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Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Sep. 28, 2019	Nov. 01, 2019
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 28, 2019
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Trading Symbol	SYNA
Entity Registrant Name	SYNAPTICS Inc
Entity Central Index Key	0000817720
Current Fiscal Year End Date	--06-27
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		33,464,178
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Title of 12(b) Security	Common Stock, par value $.001 per share
Security Exchange Name	NASDAQ
Entity File Number	000-49602
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	77-0118518
Entity Address, Address Line One	1251 McKay Drive
Entity Address, City or Town	San Jose
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95131
City Area Code	408
Local Phone Number	904-1100
Document Quarterly Report	true
Document Transition Report	false

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019
Current Assets:
Cash and cash equivalents	$ 350.8	$ 327.8
Accounts receivable, net of allowances of $2.1 at September 30, and June 30, 2019	232.2	230.0
Inventories	138.2	158.7
Prepaid expenses and other current assets	15.9	14.6
Total current assets	737.1	731.1
Property and equipment at cost, net of accumulated depreciation of $140.0 and $133.1 at September 30, 2019 and June 30, 2019, respectively	98.8	103.0
Goodwill	372.8	372.8
Acquired intangibles, net	126.6	144.8
Non-current other assets	89.0	58.1
Total assets	1,424.3	1,409.8
Current Liabilities:
Accounts payable	99.0	98.3
Accrued compensation	31.3	30.4
Income taxes payable	9.5	19.1
Other accrued liabilities	107.7	106.1
Total current liabilities	247.5	253.9
Convertible notes, net	472.8	468.3
Other long-term liabilities	49.2	30.3
Total liabilities	769.5	752.5
Stockholders' Equity:
Common stock $0.001 par value; 120,000,000 shares authorized, 64,493,058 and 64,283,948 shares issued, and 33,003,182 and 33,349,735 shares outstanding, at September 30, 2019 and June 30, 2019, respectively	0.1	0.1
Additional paid-in capital	1,277.5	1,266.1
Treasury stock: 31,489,876 and 30,934,213 common treasury shares at September 30, 2019 and June 30, 2019, respectively, at cost	(1,209.4)	(1,192.4)
Retained earnings	586.6	583.5
Total stockholders' equity	654.8	657.3
Liabilities and stockholders' equity	$ 1,424.3	$ 1,409.8

Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts receivable	$ 2.1	$ 2.1
Property and equipment, accumulated depreciation	$ 140.0	$ 133.1
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	120,000,000	120,000,000
Common stock, shares issued	64,493,058	64,283,948
Common stock, shares outstanding	33,003,182	33,349,735
Common treasury shares	31,489,876	30,934,213

Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Net revenue	$ 339.9	$ 417.6
Cost of revenue	213.7	276.7
Gross margin	126.2	140.9
Operating expenses:
Research and development	86.0	90.0
Selling, general, and administrative	27.5	33.9
Acquired intangibles amortization	2.9	2.9
Restructuring costs	6.6	8.3
Total operating expenses	123.0	135.1
Operating income	3.2	5.8
Interest and other expense, net	(3.6)	(1.9)
Income/(loss) before provision/(benefit) for income taxes and equity investment loss	(0.4)	3.9
Provision/(benefit) for income taxes	(4.9)	(0.3)
Equity investment loss	(0.5)	(0.4)
Net income	$ 4.0	$ 3.8
Net income per share:
Basic	$ 0.12	$ 0.11
Diluted	$ 0.12	$ 0.11
Shares used in computing net income per share:
Basic	33.0	35.1
Diluted	33.6	36.1

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 4.0	$ 3.8
Other comprehensive income:
Change in unrealized net gain on investment		(1.5)
Comprehensive income	$ 4.0	$ 2.3

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Millions	Total	As Adjusted [Member]	Common Stock [Member]	Common Stock [Member] As Adjusted [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] As Adjusted [Member]	Treasury Stock [Member]	Treasury Stock [Member] As Adjusted [Member]	Retained Earnings [Member]	Retained Earnings [Member] As Adjusted [Member]	Accumulated Other Comprehensive Income [Member]
Balance, value at Jun. 30, 2018	$ 729.3		$ 0.1		$ 1,195.2		$ (1,073.9)		$ 606.4		$ 1.5
Balance, shares at Jun. 30, 2018			62,889,679
Net income	3.8								3.8
Other comprehensive income	(1.5)										$ (1.5)
Issuance of common stock for share- based award compensation plans	2.1				2.1
Issuance of common stock for share-based award compensation plans, shares			140,379
Payroll taxes for deferred stock units	(0.9)				(0.9)
Purchases of treasury stock	(39.4)						(39.4)
Share-based compensation	16.7				16.7
Balance, value at Sep. 30, 2018	710.1		$ 0.1		1,213.1		(1,113.3)		610.2
Balance, shares at Sep. 30, 2018			63,030,058
Balance, value at Jun. 30, 2019	657.3	$ 656.4	$ 0.1	$ 0.1	1,266.1	$ 1,266.1	(1,192.4)	$ (1,192.4)	583.5	$ 582.6
Balance, shares at Jun. 30, 2019			64,283,948	64,283,948
Cumulative effect of changes in accounting principles at Jun. 30, 2019	(0.9)								(0.9)
Net income	4.0								4.0
Issuance of common stock for share- based award compensation plans	1.7				1.7
Issuance of common stock for share-based award compensation plans, shares			209,110
Payroll taxes for deferred stock units	(1.5)				(1.5)
Purchases of treasury stock	(17.0)						(17.0)
Share-based compensation	11.2				11.2
Balance, value at Sep. 30, 2019	$ 654.8		$ 0.1		$ 1,277.5		$ (1,209.4)		$ 586.6
Balance, shares at Sep. 30, 2019			64,493,058

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities
Net income	$ 4.0	$ 3.8
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation costs	11.2	16.7
Depreciation and amortization	7.2	10.0
Acquired intangibles amortization	18.2	20.0
Deferred taxes	(2.4)	(5.6)
Amortization of convertible debt discount and issuance costs	4.5	4.4
Amortization of debt issuance costs	0.1	0.1
Impairment recovery on investments		(2.8)
Acquired in-process research and development	3.7
Arbitration settlement		(1.9)
Equity investment loss	0.5	0.4
Foreign currency remeasurement loss		0.1
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable, net	(2.2)	(38.3)
Inventories	20.5	(30.0)
Prepaid expenses and other current assets	(1.9)	(13.8)
Other assets	(1.0)	1.1
Accounts payable	2.6	22.3
Accrued compensation	0.9	(1.6)
Income taxes payable	(9.4)	3.7
Other accrued liabilities	(9.2)	16.0
Net cash provided by operating activities	47.3	4.6
Cash flows from investing activities
Purchase of in-process research and development	(2.5)
Proceeds from sales of investments		2.8
Purchases of property and equipment	(5.0)	(6.8)
Net cash used in investing activities	(7.5)	(4.0)
Cash flows from financing activities
Purchases of treasury stock	(17.0)	(39.4)
Proceeds from issuance of shares	1.7	2.1
Payroll taxes for deferred stock and market stock units	(1.5)	(0.9)
Net cash used in financing activities	(16.8)	(38.2)
Effect of exchange rate changes on cash and cash equivalents		(0.1)
Net increase/(decrease) in cash and cash equivalents	23.0	(37.7)
Cash and cash equivalents at beginning of period	327.8	301.0
Cash and cash equivalents at end of period	350.8	263.3
Supplemental disclosures of cash flow information
Cash paid for taxes	7.1	1.7
Non-cash investing and financing activities:
Purchases of property and equipment in current liabilities	$ 1.9	$ 2.9

Basis of Presentation

3 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Basis of Presentation

1. Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission, or the SEC, and U.S. generally accepted accounting principles, or U.S. GAAP. Certain information or footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to SEC rules and regulations. In our opinion, the financial statements include all adjustments, which are of a normal and recurring nature and necessary for the fair presentation of the results of the interim periods presented. The results of operations for the interim periods are not necessarily indicative of the operating results for the full fiscal year or any future period. These financial statements should be read in conjunction with the audited consolidated financial statements and related notes included in our Annual Report on Form 10-K for the fiscal year ended June 29, 2019.

The consolidated financial statements include our financial statements and those of our wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated upon consolidation.

Our fiscal year is the 52- or 53-week period ending on the last Saturday in June. Our fiscal 2020 is a 52-week period ending June 27, 2020, and our fiscal 2019 was a 52-week period ending on June 29, 2019. The fiscal periods presented in this report are 13-weeks for the three months ended September 28, 2019, and September 29, 2018. For simplicity, the accompanying condensed consolidated financial statements have been shown as ending on calendar quarter end dates as of and for all periods presented, unless otherwise indicated.

Effective at the beginning of our first quarter of fiscal 2020, the quarter ended September 30, 2019, we adopted the requirements of Accounting Standards Update, or ASU, 2016-02, Leases, or Topic 842, issued by the Financial Accounting Standards Board, or FASB.

Use of Estimates

The preparation of consolidated financial statements in conformity with U.S. GAAP requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenue, expenses, and related disclosure of contingent assets and liabilities. On an ongoing basis, we evaluate our estimates, including those related to revenue recognition, allowance for doubtful accounts, cost of revenue, inventories, loss on purchase commitments, product warranty, accrued liabilities, share-based compensation costs, provision for income taxes, deferred income tax asset valuation allowances, uncertain tax positions, goodwill, intangible assets, investments and loss contingencies. We base our estimates on historical experience, applicable laws and regulations, and various other assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.

Foreign Currency Transactions and Foreign Exchange Contracts

The U.S. dollar is our functional and reporting currency. We remeasure our monetary assets and liabilities not denominated in the functional currency into U.S. dollar equivalents at the rate of exchange in effect on the balance sheet date. We measure and record non-monetary balance sheet accounts at the historical rate in effect at the date of transaction. We remeasure foreign currency expenses at the weighted average exchange rate in the month that the transaction occurred. Our foreign currency transactions and remeasurement gains and losses are included in selling, general, and administrative expenses in the condensed consolidated statements of income and resulted in net gains of $0.4 million in the three months ended September 30, 2019 and net losses of $0.4 million for the three months ended September 30, 2018.

Leases

We determine if a contract is a lease or contains a lease at the inception of the contract and reassess that conclusion if the contract is modified. All leases are assessed for classification as an operating lease or a finance lease. Operating lease right-of-use, or ROU, assets are included in non-current other assets on our condensed consolidated balance sheet. Operating lease liabilities are separated into a current portion, included within accrued liabilities on our condensed consolidated balance sheet, and a non-current portion, included within operating lease liabilities on our condensed consolidated balance sheet. We do not have any finance lease ROU assets or liabilities. ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. We do not obtain and control the right to use the identified asset until the lease commencement date.

Our lease liabilities are recognized at the applicable lease commencement date based on the present value of the lease payments required to be paid over the lease term. Because the interest rate implicit in the lease is not readily determinable, we generally use our incremental borrowing rate to discount the lease payments to present value. The estimated incremental borrowing rate is derived from information available at the lease commencement date. We factor in publicly available data for instruments with similar characteristics when calculating our incremental borrowing rates. Our ROU assets are also recognized at the applicable lease commencement date. The ROU asset equals the carrying amount of the related lease liability, adjusted for any lease payments made prior to lease commencement and lease incentives provided by the lessor. Variable lease payments are expensed as incurred and do not factor into the measurement of the applicable ROU asset or lease liability.

The term of our leases equals the non-cancellable period of the lease, including any rent-free periods provided by the lessor, and also include options to renew or extend the lease (including by not terminating the lease) that we are reasonably certain to exercise. We establish the term of each lease at lease commencement and reassess that term in subsequent periods when one of the triggering events outlined in Topic 842 occurs. Operating lease cost for lease payments is recognized on a straight-line basis over the lease term.

Our lease contracts often include lease and non-lease components. For our leases, we have elected the practical expedient offered by the standard to not separate lease from non-lease components and account for them as a single lease component.

We have elected, for all classes of underlying assets, not to recognize ROU assets and lease liabilities for leases with a term of twelve months or less. Lease cost for short-term leases is recognized on a straight-line basis over the lease term.

Asset Acquisition

We acquired an emerging technology startup company focused on the design of high-speed connectivity products in August 2019. The purchase price primarily included $2.5 million in cash paid at the closing, and up to $6.5 million in contingent consideration which is payable in set amounts upon meeting various milestones on dates from December 2021 through December 2023. As of September 30, 2019, we have accrued $1.3 million of the contingent consideration as that is the portion which is currently estimable and probable. The acquisition was accounted for as an asset purchase and accordingly we expensed $3.7 million of in-process research and development, recorded liabilities of approximately $1.5 million and recorded a long-term deferred tax asset of $0.3 million in the three months ended September 30, 2019.

Impact of Recently Adopted Accounting Pronouncements

3 Months Ended

Sep. 30, 2019

New Accounting Pronouncements And Changes In Accounting Principles [Abstract]

Impact of Recently Adopted Accounting Pronouncements

2. Impact of Recently Adopted Accounting Pronouncements

On June 30, 2019, we adopted Accounting Standards Codification Topic 842, or ASC 842, Leases, which requires recognition of ROU assets and lease liabilities for most leases on our consolidated balance sheet. We adopted ASC 842 using a modified retrospective transition approach as of the effective date as permitted by ASC 842. As a result, we were not required to adjust our comparative period financial information for effects of the standard or make the new required lease disclosures for the periods before the date of adoption. We elected the package of practical expedients which allows us not to reassess (1) whether existing or expired contracts, as of the adoption date, contain leases, (2) the lease classification for existing leases, and (3) whether existing initial direct costs meet the new definition. We also elected the practical expedient to not separate lease and non-lease components for our leases, and to not recognize ROU assets and liabilities for short-term leases

The standard had a material impact on our condensed consolidated balance sheet but did not have a significant impact on our condensed consolidated statements of income or cash flows. The most significant impact was the recognition of ROU assets and lease liabilities for operating leases.

The adoption of this new standard at June 30, 2019, resulted in the following changes:

•

assets increased by $27.8 million, primarily representing the recognition of ROU assets for operating leases; and

•

liabilities increased by $28.4 million, primarily representing the recognition of lease liabilities for operating leases.

Revenue Recognition

3 Months Ended

Sep. 30, 2019

Revenue From Contract With Customer [Abstract]

Revenue Recognition

3. Revenue Recognition

We adopted Accounting Standards Codification Topic 606, or ASC 606, Revenue from Contracts with Customers, at the beginning of our fiscal 2019. Our revenue is primarily generated from the sale of application specific integrated circuit chips, or ASIC chips, either directly to a customer or to a distributor. Revenues are recognized when control of the promised goods or services is transferred to our customers, in an amount that reflects the consideration we expect to receive in exchange for those goods or services. All of our revenue, except an inconsequential amount, is recognized at a point in time, either on shipment or delivery of the product, depending on customer terms and conditions. We generally warrant our products for a period of 12 months from the date of sale and estimate probable product warranty costs at the time we recognize revenue as the warranty is considered an assurance warranty and not a performance obligation. Non-product revenue is recognized over the same period of time such performance obligations are satisfied. We then select an appropriate method for measuring satisfaction of the performance obligations.

Revenue from sales to distributors is recognized upon shipment of the product to the distributors (sell-in basis). Master sales agreements are in place with certain customers, and these agreements typically contain terms and conditions with respect to payment, delivery, warranty and supply. In the absence of a master sales agreement, we consider a customer's purchase order or our standard terms and conditions to be the contract with the customer.

Our pricing terms are negotiated independently, on a stand-alone basis. In determining the transaction price, we evaluate whether the price is subject to refund or adjustment to determine the net consideration which we expect to receive for the sale of such products. In limited situations, we make sales to certain customers under arrangements where we grant stock rotation rights, price protection and price allowances; variable consideration associated with these rights is expected to be inconsequential. These adjustments and incentives are accounted for as variable consideration, classified as other current liabilities under the revenue standard and are shown as customer obligations in Note 9 Other Accrued Liabilities and Other Long-Term Liabilities. We estimate the amount of variable consideration for such arrangements based on the expected value to be provided to customers, and we do not believe that there will be significant changes to our estimates of variable consideration. When incentives, stock rotation rights, price protection, volume discounts, or price allowances are applicable, they are estimated and recorded in the period the related revenue is recognized. Stock rotation reserves are based on historical return rates and recorded as a reduction to revenue with a corresponding reduction to cost of goods sold for the estimated cost of inventory that is expected to be returned and recorded as prepaid expenses and other current assets. In limited circumstances, we enter into volume-based tiered pricing arrangements and we estimate total unit volumes under such arrangement to determine the expected transaction price for the units expected to be transferred. Such arrangements are accounted for as contract liabilities within other accrued liabilities. Sales returns liabilities are recorded as refund liabilities within other accrued liabilities.

Our accounts receivable balance is from contracts with customers and represents our unconditional right to receive consideration from customers. Payments are generally due within three months upon completion of the performance obligation and subsequent invoicing and therefore, do not include significant financing components. To date, there have been no material impairment losses on accounts receivable. There was $1.0 million in contract assets recorded on the condensed consolidated balance sheets as of September 30, 2019 and $0.9 million as of June 30, 2019. Contract assets are presented as part of prepaid expenses and other current assets. Contract liabilities and refund liabilities were $6.4 million and $38.3 million, respectively, as of September 30, 2019, and $4.5 million and $47.5 million, respectively, as of June 30, 2019. Both contract liabilities and refund liabilities are presented as part of customer obligations in Note 9 Other Accrued Liabilities and Other Long-Term Liabilities. During the three months ended September 30, 2019 and the three months ended September 30, 2018, we recognized $0.2 million and $0.4 million, respectively, in revenue related to contract liabilities outstanding as of the beginning of each such fiscal year.

We invoice customers for each delivery upon shipment and recognize revenue in accordance with delivery terms. As of September 30, 2019, we did not have any remaining unsatisfied performance obligations with an original duration greater than one year. Accordingly, under the optional exception provided by ASC 606, we do not disclose revenues allocated to future performance obligations of partially completed contracts. We have elected to account for shipping and handling costs as fulfillment costs before the customer obtains control of the goods. We continue to classify shipping and handling costs as a cost of revenue. We have elected to continue to account for collection of all taxes on a net basis.

We incur commission expense that is incremental to obtaining contracts with customers. Sales commissions (which are recorded as a selling, general and administrative expense in the condensed consolidated statements of income) are expensed when the product is shipped because such commissions are owed after shipment.

Revenue from contracts with customers disaggregated by geographic area based on customer location and groups of similar products is presented in Note 14 Segment, Customers, and Geographical Information.

Net Income Per Share

3 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Net Income Per Share

4. Net Income Per Share

The computation of basic and diluted net income per share was as follows (in millions, except per share data):

	Three Months Ended
	September 30,
	2019		2018
Numerator:
Net income	$	4.0	$	3.8
Denominator:
Shares, basic		33.0		35.1
Effect of dilutive share-based awards		0.6		1.0
Shares, diluted		33.6		36.1
Net income per share:
Basic	$	0.12	$	0.11
Diluted	$	0.12	$	0.11

Our basic net income per share amounts for each period presented have been computed using the weighted average number of shares of common stock outstanding over the period measured. Our diluted net income per share amounts for each period presented include the weighted average effect of potentially dilutive shares. We use the treasury stock method to determine the dilutive effect of our stock options, deferred stock units, or DSUs, market stock units, or MSUs, performance stock units, or PSUs, and our convertible notes.

Dilutive net income per share amounts do not include the potential weighted average effect of 1,340,521 and 1,357,565 shares of common stock related to certain share-based awards that were outstanding during the three months ended September 30, 2019 and 2018, respectively. These share-based awards were not included in the computation of diluted net income per share because their effect would have been antidilutive.

Fair Value

3 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

Fair Value

5. Fair Value

Our financial assets, measured at fair value on a recurring basis under the fair value hierarchy, consisted of money market funds within level 1 financial assets and totaled $331.0 million and $313.7 million as of September 30, 2019 and June 30, 2019, respectively. These money market funds were included in cash and cash equivalents in our condensed consolidated balance sheets.

The fair values of our accounts receivable and accounts payable approximate their carrying values because of the short-term nature of those instruments. Intangible assets, property and equipment, and goodwill are measured at fair value on a non-recurring basis if impairment is indicated.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Inventories

3 Months Ended

Sep. 30, 2019

Inventory Disclosure [Abstract]

Inventories

6. Inventories

Inventories are stated at the lower of cost (first-in, first-out method) or net realizable value and consisted of the following (in millions):

	September 30,		June 30,
	2019		2019
Raw materials and work-in-progress	$	72.1	$	110.7
Finished goods		66.1		48.0
	$	138.2	$	158.7

We record a write-down, if necessary, to reduce the carrying value of inventory to its net realizable value. The effect of these write-downs is to establish a new cost basis in the related inventory, which we do not subsequently write up. We also record a liability and charge to cost of revenue for estimated losses on inventory we are obligated to purchase from our contract manufacturers when such losses become probable from customer delays, order cancellations, or other factors.

Acquired Intangibles and Goodwill

3 Months Ended

Sep. 30, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Acquired Intangibles and Goodwill

7. Acquired Intangibles and Goodwill

Acquired Intangibles

The following table summarizes the life, the gross carrying value and the related accumulated amortization of our acquired intangible assets as of September 30, 2019 and June 30, 2019 (in millions):

			September 30, 2019							June 30, 2019
	Weighted Average Life in Years		Gross Carrying Value		Accumulated Amortization			Net Carrying Value		Gross Carrying Value		Accumulated Amortization			Net Carrying Value
Display driver technology		5.3	$	164.0	$	(155.9	)	$	8.1	$	164.0	$	(148.1	)	$	15.9
Audio and video technology		5.3		138.6		(56.1	)		82.5		138.6		(49.4	)		89.2
Customer relationships		4.1		81.8		(52.8	)		29.0		81.8		(49.9	)		31.9
Fingerprint authentication technology	Not applicable			—		—			—		47.2		(47.2	)		—
Licensed technology and other		4.2		7.7		(4.1	)		3.6		7.7		(3.6	)		4.1
Patents		8.1		4.4		(2.2	)		2.2		4.4		(2.0	)		2.4
Tradename		7.0		1.8		(0.6	)		1.2		1.8		(0.5	)		1.3
Acquired intangibles, gross		4.9	$	398.3	$	(271.7	)	$	126.6	$	445.5	$	(300.7	)	$	144.8

The total amortization expense for the acquired intangible assets was $18.2 million and $20.0 million for the three months ended September 30, 2019 and 2018, respectively. During the three months ended September 30, 2019 and 2018, $15.3 million and $17.0 million, respectively, of amortization expense was included in our condensed consolidated statements of income in cost of revenue; the remainder was included in acquired intangibles amortization.

The following table presents expected annual fiscal year aggregate amortization expense as of September 30, 2019 (in millions):

Remainder of 2020	$	33.2
2021		37.5
2022		32.9
2023		20.4
2024		2.5
2025		0.1
Future amortization	$	126.6

Goodwill

Goodwill represents the excess of the purchase price over the fair value of net tangible and identifiable intangible assets acquired. There was no change in goodwill during the three months ended September 30, 2019.

Leases

3 Months Ended

Sep. 30, 2019

Leases [Abstract]

Leases

8. Leases

Our leases mainly include our worldwide office and research and development facilities which are all classified as operating leases. Certain leases include renewal options that are under our discretion. The leases expire at various dates through fiscal year 2026, some of which include options to extend the lease for up to 5 years. For the quarter ended September 30, 2019, the Company recorded approximately $2.3 million of operating lease expense. Our short-term leases are immaterial and we do not have finance leases.

As of September 30, 2019, the components of leases and lease costs are as follows (in millions):

	September 30,
	2019
Operating lease right-of-use assets	$	25.8
Operating lease liabilities	$	8.4
Operating lease liabilities, long-term		17.8
Total operating lease liabilities	$	26.2

Supplemental cash flow information related to leases is as follows (in millions):

	Three Months Ended
	September 30,
	2019
Cash paid for operating leases included in operating cash flows	$	2.3
Supplemental non-cash information related to lease liabilities arising from obtaining right-of-use assets		2.0

As of September 30, 2019, the weighted average remaining lease term is 3.8 years, and the weighted average discount rate is 4.21%.

Future minimum lease payments for the operating lease liabilities are as follows (in millions):

	Operating
	Lease
Fiscal Year	Payments
Remainder of 2020	$	7.0
2021		8.5
2022		5.7
2023		3.4
2024		2.0
Thereafter		1.7
Total future minimum operating lease payments		28.3
Less: interest		(2.1	)
Total lease liabilities	$	26.2

As of the beginning of our fiscal quarter ended September 30, 2019, our aggregate minimum rental commitments for future fiscal years for non-cancelable operating leases with initial or remaining terms in excess of one year were as follows (in millions):

	Operating
	Lease
Fiscal Year	Payments
2020	$	7.4
2021		3.2
2022		0.9
2023		0.3
2024		0.1
Total future minimum operating lease payments	$	11.9

Other Accrued Liabilities and Other Long-Term Liabilities

3 Months Ended

Sep. 30, 2019

Payables And Accruals [Abstract]

Other Accrued Liabilities and Other Long-Term Liabilities

9. Other Accrued Liabilities and Other Long-Term Liabilities

Other accrued liabilities consisted of the following (in millions):

	September 30,		June 30,
	2019		2019
Customer Obligations	$	44.7	$	52.0
Inventory obligations		26.8		26.7
Operating lease liabilities		8.4		—
Warranty		4.0		4.0
Other		23.8		23.4
	$	107.7	$	106.1

Other long-term liabilities consisted of the following (in millions):

	September 30,		June 30,
	2019		2019
Income taxes payable, long-term	$	16.4	$	16.2
Operating lease liabilities, long-term		17.8		—
Other		15.0		14.1
	$	49.2	$	30.3

Indemnifications and Contingencies

3 Months Ended

Sep. 30, 2019

Commitments And Contingencies Disclosure [Abstract]

Indemnifications and Contingencies

10. Indemnifications and Contingencies

Indemnifications

In connection with certain agreements, we are obligated to indemnify the counterparty against third party claims alleging infringement of certain intellectual property rights by us. We have also entered into indemnification agreements with our officers and directors. Maximum potential future payments under these agreements cannot be estimated because these agreements generally do not have a maximum stated liability. However, historical costs related to these indemnification provisions have not been significant. We have not recorded any liability in our condensed consolidated financial statements for such indemnification obligations.

Contingencies

We have in the past, and may in the future, receive notices from third parties that claim our products infringe their intellectual property rights. We cannot be certain that our technologies and products do not and will not infringe issued patents or other proprietary rights of third parties.

Any infringement claims, with or without merit, could result in significant litigation costs and diversion of management and financial resources, including the payment of damages, which could have a material adverse effect on our business, financial condition, and results of operations.

Debt

3 Months Ended

Sep. 30, 2019

Debt Disclosure [Abstract]

Debt

11. Debt

Convertible Debt

Our convertible debt consists of an original $525 million aggregate principal amount of 0.50% convertible senior notes due 2022, or the Notes, which were issued in a private placement transaction. The net proceeds from the Notes, after deducting discounts, were $514.5 million.

The Notes bear interest at a rate of 0.50% per year, which is payable semi-annually in arrears, on June 15 and December 15 of each year. The Notes are senior unsecured obligations and rank senior in right of payment to any of our indebtedness that is expressly subordinated in right of payment to the Notes; equal in right of payment to any our liabilities that are not so subordinated; effectively junior in right of payment to any of our secured indebtedness to the extent of the value of the assets securing such indebtedness; and structurally junior to all indebtedness and other liabilities (including trade payables) of our subsidiaries.

The Notes mature on June 15, 2022, or the Maturity Date, unless earlier repurchased, redeemed or converted.

Holders may convert all or any portion of their Notes, in multiples of $1,000 principal amounts, at their option at any time prior to the close of business on the business day immediately preceding March 15, 2022 under certain defined circumstances.

On or after March 15, 2022 until the close of business on the business day immediately preceding the Maturity Date, holders may convert all or any portion of their Notes, in multiples of $1,000 principal amounts, at the option of the holder. Upon conversion, we will pay or deliver, at our election, shares of common stock, cash, or a combination of cash and shares of common stock.

The conversion rate for the Notes is initially 13.6947 shares of common stock per $1,000 principal amount of Notes (equivalent to an initial conversion price of approximately $73.02 per share of common stock). The conversion rate is subject to adjustment in certain circumstances.

Upon the occurrence of a fundamental change (as defined in the Notes indenture), holders of the Notes may require us to repurchase for cash all or a portion of their Notes at a fundamental change repurchase price equal to 100% of the principal amount of the Notes to be repurchased, plus accrued and unpaid interest up to, but excluding, the fundamental change repurchase date.

We may not redeem the Notes prior to June 20, 2020. We may redeem for cash all or any portion of the Notes, at our option, on or after June 20, 2020, if the last reported sale price of our common stock, as determined by us, has been at least 130% of the conversion price then in effect for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period (including the last trading day of such period) ending on, and including, the trading day immediately preceding the date on which we provide notice of redemption at a redemption price equal to 100% of the principal amount of the Notes to be redeemed, plus accrued and unpaid interest up to, but excluding, the redemption date. Our policy is to settle the principal amount of our Notes with cash upon conversion or redemption.

As of the issuance date of the Notes, we recorded $82.1 million of the principal amount to equity, representing the debt discount for the difference between our estimated nonconvertible debt borrowing rate of 4.39% and the coupon rate of the Notes of 0.50% using a five-year life, which coincides with the term of the Notes. In addition, we allocated the total of $11.1 million of debt issuance costs, consisting of the initial purchaser’s discount of $10.5 million and legal, accounting, and printing costs of $579,000, pro rata, to the equity and debt components of the Notes, or $1.9 million and $9.2 million, respectively. The debt discount and the debt issuance costs allocated to the debt component of the Notes are amortized as interest expense using the effective interest method over five years.

The contractual interest expense and amortization of discount on the Notes for the three months ended September 30, 2019, were as follows (in millions):

	Three Months Ended
	September 30,
	2019
Interest expense	$	0.7
Amortization of discount and debt issuance costs		4.5
Total interest	$	5.2

The unamortized amounts of the debt issuance costs and discount associated with the Notes as of September 30, 2019 were $5.2 million and $47.0 million, respectively.

Revolving Credit Facility

In September 2017, we entered into an Amendment and Restatement Agreement, or the Agreement, with the lenders that are party thereto, or the Lenders, and Wells Fargo Bank, National Association, as administrative agent for the Lenders. The Agreement terminated our prior term loan arrangement and provides for a revolving credit facility in a principal amount of up to $200 million, which includes a $20 million sublimit for letters of credit and a $20 million sublimit for swingline loans. Under the terms of the Agreement, we may, subject to the satisfaction of certain conditions, request increases in the revolving credit facility commitments in an aggregate principal amount of up to $100 million to the extent existing or new lenders agree to provide such increased or additional commitments, as applicable. Proceeds under the revolving credit facility are available for working capital and general corporate purposes. As of September 30, 2019, there was no balance outstanding under the revolving credit facility.

The revolving credit facility is required to be repaid in full on the earlier of (i) September 27, 2022, and (ii) the date 91 days prior to the Maturity Date of the Notes if the Notes have not been refinanced in full by such date. Debt issuance costs of $2.3 million relating to the revolving credit facility will be amortized over 60 months.

Our obligations under the Agreement are guaranteed by the material domestic subsidiaries of our Company, subject to certain exceptions (such material subsidiaries, together with our Company, collectively, the Credit Parties). The obligations of the Credit Parties under the Agreement and the other loan documents delivered in connection therewith are secured by a first priority security interest in substantially all of the existing and future personal property of the Credit Parties, including, without limitation, 65% of the voting capital stock of certain of the Credit Parties’ direct foreign subsidiaries, subject to certain exceptions.

The revolving credit facility bears interest at our election of a Base Rate plus an Applicable Margin or LIBOR plus an Applicable Margin. Swingline loans bear interest at a Base Rate plus an Applicable Margin. The Base Rate is a floating rate that is the greater of the Prime Rate, the Federal Funds Rate plus 50 basis points, or LIBOR plus 100 basis points. The Applicable Margin is based on a sliding scale which ranges from 0.25 to 100 basis points for Base Rate loans and 100 basis points to 175 basis points for LIBOR loans. We are required to pay a commitment fee on any unused commitments under the Agreement which is determined on a leverage-based sliding scale ranging from 0.175% to 0.25% per annum. Interest and fees are payable on a quarterly basis. The LIBOR index is expected to be discontinued at the end of 2021. Under our credit facility, when the LIBOR index is discontinued, we will switch to a comparable or successor rate as approved by the Administrative Agent, which is currently anticipated to be Secured Overnight Financing Rate, or SOFR.

Under the Agreement, there are various restrictive covenants, including three financial covenants which limit the consolidated total leverage ratio, or leverage ratio, the consolidated interest coverage ratio, or interest coverage ratio, a restriction which places a limit on the amount of capital expenditures that may be made in any fiscal year, a restriction that permits up to $50 million per fiscal quarter of accounts receivable financings, and sets the Specified Leverage Ratio. The leverage ratio is the ratio of debt as of the measurement date to earnings before interest, taxes, depreciation and amortization, or EBITDA, for the four consecutive quarters ending with the quarter of measurement. The current leverage ratio shall not exceed 3.50 to 1.00 provided that for the four fiscal quarters ending after the date of a material acquisition, such maximum leverage ratio shall be adjusted to 3.75 to 1.00, and thereafter, shall not be more than 3.50 to 1.00. The interest coverage ratio is EBITDA to interest expense for the four consecutive quarters ending with the quarter of measurement. The interest coverage ratio must not be less than 3.50 to 1.0 during the term of the Agreement. The Specified Leverage Ratio is the ratio used in determining, among other things, whether we are permitted to make dividends and/or prepay certain indebtedness, at a fixed ratio of 3.00 to 1.00. As of the end of the fiscal quarter, we were in compliance with the restrictive covenants.

Share-Based Compensation

3 Months Ended

Sep. 30, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Share-Based Compensation

12. Share-Based Compensation

Share-based compensation and the related tax benefit recognized in our condensed consolidated statements of income were as follows (in millions):

	Three Months Ended
	September 30,
	2019		2018
Cost of revenue	$	0.7	$	0.9
Research and development		7.5		8.3
Selling, general, and administrative		3.0		7.5
Total	$	11.2	$	16.7
Income tax benefit on share-based compensation	$	0.9	$	2.7

Historically, we have issued new shares in connection with our share-based compensation plans, however, treasury shares are also available for issuance. Any additional shares repurchased under our common stock repurchase program will be available for issuance under our share-based compensation plans.

Stock Options

Stock option activity were as follows:

	Stock			Weighted		Aggregate
	Option			Average		Intrinsic
	Awards			Exercise		Value
	Outstanding			Price		(in millions)
Balance as of June 30, 2019		1,191,929		$	59.07
Granted		—			—
Exercised		(68,057	)		24.54
Forfeited		(75,300	)		65.02
Balance as of September 30, 2019		1,048,572			60.88	$	1.0
Exercisable at September 30, 2019		1,034,044			61.01	$	1.0

The aggregate intrinsic value was determined using the closing price of our common stock on September 27, 2019 of $39.62 and excludes the impact of stock options that were not in-the-money.

Deferred Stock Units

DSU activity were as follows:

				Aggregate
	DSU			Intrinsic
	Awards			Value
	Outstanding			(in millions)
Balance as of June 30, 2019		1,878,853
Granted		200,417
Delivered		(183,256	)
Forfeited		(106,072	)
Balance as of September 30, 2019		1,789,942		$	70.9

The aggregate intrinsic value was determined using the closing price of our common stock on September 27, 2019 of $39.62.

Of the shares delivered, 42,740 shares valued at $1.5 million were withheld to meet statutory tax withholding requirements.

Market Stock Units

Our Amended and Restated 2010 Incentive Compensation Plan provides for the grant of MSU awards to our employees, consultants, and directors and our 2019 Inducement Equity Plan provides for the grant of MSU awards to certain of our employees. An MSU is a promise to deliver shares of our common stock at a future date based on the achievement of market-based performance requirements in accordance with the terms of the MSU grant agreement.

We have granted MSUs to our executive officers and other management members, which are designed to vest in three or four tranches with the target quantity for each tranche equal to one-third or one-fourth of the total MSU grant. The first tranche vests based on a one-year performance period; the second tranche vests based on a two-year performance period; the third tranche vests based on a three-year performance period; and the fourth tranche (in the case of four-year vesting) vests based on a four-year performance period. Performance is measured based on the achievement of a specified level of total stockholder return, or TSR, relative to the TSR of the S&P Semiconductor Select Industry Index, or SPSISC Index, for grants made beginning in fiscal 2018, and relative to the Philadelphia Semiconductor Index, or SOX Index, for grants made prior to fiscal 2018. The potential payout ranges from 0% to 200% of the grant target quantity and is adjusted on a two-to-one ratio based on our TSR performance relative to the SPSISC Index TSR or SOX Index TSR using the following formula:

(100% + ([Synaptics TSR — {SPSISC Index TSR or SOX Index TSR}] x 2))

For MSUs vesting over three years, the payout for the first tranche and the second tranche will not exceed 100% and the payout for the third tranche will be calculated based on the total target quantity for the entire grant multiplied by the payout factor, based on performance for the three-year performance period, less shares issued for the first tranche and the second tranche. For MSUs vesting over four years, the payout for the first tranche, the second tranche and the third tranche will not exceed 100% and the payout for the fourth tranche will be calculated based on the total target quantity for the entire grant multiplied by the payout factor, based on performance for the four-year performance period, less shares issued for the first tranche, the second tranche and the third tranche.

Delivery of shares earned, if any, will take place on the dates provided in the applicable MSU grant agreement, assuming the grantee is still an employee, consultant, or director of our company at the end of the applicable performance period. On the delivery date, we withhold shares to cover statutory tax withholding requirements and deliver a net quantity of shares to the employee, consultant, or director after such withholding. Until delivery of shares, the grantee has no rights as a stockholder with respect to any shares underlying the MSU award.

During the three months ended September 30, 2019, MSU activity and balances as of September 30, 2019 was as follows:

				Aggregate
	MSU			Intrinsic
	Awards			Value
	Outstanding			(in millions)
Balance as of June 30, 2019		210,732
Granted		185,982
Forfeited		(30,928	)
Balance as of September 30, 2019		365,786		$	14.5

The aggregate intrinsic value was determined using the closing price of our common stock on September 27, 2019 of $39.62.

We value MSUs using the Monte Carlo simulation model on the date of grant and amortize the compensation expense over the three- or four-year performance and service period on a straight-line basis. The unrecognized share-based compensation cost of our outstanding MSUs was approximately $14.5 million as of September 30, 2019, which will be recognized over a weighted average period of approximately 1.6 years.

Performance Stock Units

Our Amended and Restated 2010 Incentive Compensation Plan provides for the grant of PSU awards to our employees, consultants, and directors. A PSU is a promise to deliver shares of our common stock at a future date based on the achievement of performance-based requirements in accordance with the terms of the PSU grant agreement.

We have granted PSUs to our executive officers and other management members, which are designed to vest in three tranches with the target quantity for each tranche equal to one-third of the total PSU grant. The grants have a specific one-year performance period and vesting occurs over three service periods with the final service period ending approximately three years from the grant date. Performance is measured based on the achievement of a specified level of non-GAAP earnings per share. The potential payout ranges from 0% to 200% of the grant target quantity and is adjusted on a linear basis with a payout triggering if our non-GAAP earnings per share equals greater than 65% of the target with a maximum payout achieved at 135% of target.

Delivery of shares earned, if any, will take place on the dates provided in the applicable PSU grant agreement, assuming the grantee is still an employee, consultant, or director of our company at the end of the applicable service period. On the delivery date, we withhold shares to cover statutory tax withholding requirements and deliver a net quantity of shares to the employee, consultant, or director after such withholding. Until delivery of shares, the grantee has no rights as a stockholder with respect to any shares underlying the PSU award.

During the three months ended September 30, 2019, PSU activity and balances as of September 30, 2019 were as follows:

				Aggregate
	PSU			Intrinsic
	Awards			Value
	Outstanding			(in millions)
Balance as of June 30, 2019		192,618
Forfeited		(29,095	)
Balance as of September 30, 2019		163,523		$	6.5

The aggregate intrinsic value was determined using the closing price of our common stock on September 27, 2019 of $39.62.

We value PSUs using the aggregate intrinsic value on the date of grant adjusted for estimated performance achievement during the performance period and amortize the compensation expense over the three-year service period on a ratable basis. The unrecognized share-based compensation cost of our outstanding PSUs was approximately $1.3 million as of September 30, 2019, which will be recognized over a weighted average period of approximately 0.8 years.

Employee Stock Purchase Plan

There were no employee stock purchase plan purchases during the three-month period ended September 30, 2019.

Income Taxes

3 Months Ended

Sep. 30, 2019

Income Tax Disclosure [Abstract]

Income Taxes

13. Income Taxes

We account for income taxes under the asset and liability method. The provision for income taxes recorded in interim periods is recorded by applying the estimated annual effective tax rate to year-to-date income before provision for income taxes, excluding the effects of significant unusual or infrequently occurring discrete items. The tax effects of discrete items are recorded in the same period that the related discrete items are reported and results in a difference between the actual effective tax rate and the estimated annual effective tax rate.

The benefit for income taxes of $4.9 million and $0.3 million for the three months ended September 30, 2019 and 2018, respectively, represented estimated federal, foreign, and state income taxes. The effective tax rate for the three months ended September 30, 2019 diverged from the combined U.S. federal and state statutory tax rate primarily because of foreign deemed-paid taxes, foreign income taxed at higher tax rates, and global intangible low-taxed income, or GILTI, partially offset by the benefit of research credits and foreign tax credits. The effective tax rate for the three months ended September 30, 2018, diverged from the combined U.S. federal and state statutory tax rate, primarily because of the benefit of research credits, foreign tax credits, foreign-derived intangible income deduction, excess share-based compensation deductions, release of reserves related to uncertain tax positions and foreign income taxed at lower tax rates, partially offset by foreign withholding taxes, nondeductible amortization, the impact of accounting for qualified stock options, and GILTI.

The total liability for gross unrecognized tax benefits related to uncertain tax positions increased $1.2 million during the three months ended September 30, 2019, to $20.1 million from $18.9 million at June 30, 2019, and was included in other long-term liabilities on our condensed consolidated balance sheets. If recognized, the total gross unrecognized tax benefits would reduce the effective tax rate on income from continuing operations. Accrued interest and penalties related to unrecognized tax benefits as of September 30, 2019 were $1.7 million; this balance decreased by $0.2 million compared to June 30, 2019. We classify interest and penalties as components of income tax expense. It is reasonably possible that the amount of the liability for unrecognized tax benefits may change within the next twelve months and an estimate of the range of possible changes includes an increase in our liability of up to $2.5 million.

In June 2019, the U.S. Ninth Circuit Court of Appeals reversed the 2015 decision of the U.S. Tax Court in Altera Corp. v. Commissioner which found that the Treasury regulations addressing the treatment of stock-based compensation in a cost-sharing arrangement with a related party were invalid. As our tax filing position is consistent with the Treasury regulations, no adjustment to our financial statements is required. However, due to the uncertainties with respect to the ultimate resolution, we will continue to monitor developments in this case.

Our major tax jurisdictions are the United States, Hong Kong SAR, and Japan. From fiscal 2013 onward, we remain subject to examination by one or more of these jurisdictions. In August 2018, we received the revenue agent’s report resolving the fiscal 2014 and fiscal 2015 examination by the Internal Revenue Service with no material impact on our condensed consolidated financial statements. Our case was reviewed by the Joint Committee on Taxation, which concluded in September 2019 with no further impact to our condensed consolidated financial statements.

Segment, Customers, and Geographic Information

3 Months Ended

Sep. 30, 2019

Segment Reporting [Abstract]

Segment, Customers, and Geographic Information

14. Segment, Customers, and Geographic Information

We operate in one segment: the development, marketing, and sale of semiconductor products used in electronic devices and products. We generate our revenue from three broad product categories: the Mobile product market, the personal computing, or PC, product market, and the Internet of Things, or IoT, product market. We sell our products to original equipment manufacturers, or OEMs, and to contract manufacturers that provide manufacturing services to OEMs.

Net revenue within geographic areas based on our customers’ locations for the periods presented was as follows (in millions):

	Three Months Ended
	September 30,
	2019		2018
China	$	176.8	$	227.8
Taiwan		65.2		76.4
Japan		63.2		68.5
Other		16.5		15.4
South Korea		16.4		20.1
United States		1.8		9.4
	$	339.9	$	417.6

Net revenue from our customers for each group of similar products was as follows (in millions):

	Three Months Ended
	September 30,
	2019		2018
Mobile product applications	$	184.3	$	262.7
PC product applications		67.8		68.6
IoT product applications		87.8		86.3
	$	339.9	$	417.6

Net revenue from major customers as a percentage of total net revenue for the periods presented was as follows:

	Three Months Ended
	September 30,
	2019	2018
Customer A	12%	11%
Customer B	12%	*
Customer C	*	17%

*	Less than 10%

We extend credit based on evaluation of a customer’s financial condition, and we generally do not require collateral. Major customer accounts receivable as a percentage of total accounts receivable were as follows:

	September 30,	June 30,
	2019	2019
Customer A	19%	25%
Customer B	13%	*
Customer C	11%	16%

*	Less than 10%

Comprehensive Income

3 Months Ended

Sep. 30, 2019

Equity [Abstract]

Comprehensive Income

15. Comprehensive Income

Our comprehensive income generally consists of net income plus the effect of unrealized gains and losses on our investments, primarily due to temporary changes in market value of certain of our auction rate securities, or ARS, investments. In addition, we recognize the noncredit portion of other-than-temporary impairment on debt securities in other comprehensive income. We recognize foreign currency remeasurement adjustments and foreign currency transaction gains and losses in our condensed consolidated statements of income as the U.S. dollar is the functional currency of our foreign entities.

Restructuring Activities

3 Months Ended

Sep. 30, 2019

Restructuring And Related Activities [Abstract]

Restructuring Activities

16. Restructuring Activities

In August 2018, we committed to and initiated a restructuring of our mobile fingerprint optical business. The costs for this restructuring activity primarily related to severance costs for a reduction in headcount and related costs. These activities were complete as of June 30, 2019. In June 2019, we committed to and initiated a restructuring action intended to reduce our operating cost structure further. The costs for this restructuring action primarily related to severance costs for a reduction in headcount. Restructuring costs related to these fiscal 2019 restructuring activities were recorded to the restructuring costs line item within our consolidated statements of income. We expect to complete activities relating to the June 2019 restructuring action in the second quarter of fiscal 2020.

The restructuring liability for the fiscal 2019 initiated activity during fiscal 2019 and the three months ended September 30, 2019 were as follows (in millions):

	Employee Severance
	and Benefits
Accruals	$	17.7
Cash payments		(12.5	)
Balance as of June 30, 2019		5.2
Accruals		6.6
Cash payments		(6.8	)
Balance as of September 30, 2019	$	5.0

Basis of Presentation (Policies)

3 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Use of Estimates

Foreign Currency Transactions and Foreign Exchange Contracts

Leases

Asset Acquisition

Impact of Recently Adopted Accounting Pronouncements

The adoption of this new standard at June 30, 2019, resulted in the following changes:

•

assets increased by $27.8 million, primarily representing the recognition of ROU assets for operating leases; and

•

liabilities increased by $28.4 million, primarily representing the recognition of lease liabilities for operating leases.

Net Income Per Share (Tables)

3 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Computation of Basic and Diluted Net Income Per Share

The computation of basic and diluted net income per share was as follows (in millions, except per share data):

	Three Months Ended
	September 30,
	2019		2018
Numerator:
Net income	$	4.0	$	3.8
Denominator:
Shares, basic		33.0		35.1
Effect of dilutive share-based awards		0.6		1.0
Shares, diluted		33.6		36.1
Net income per share:
Basic	$	0.12	$	0.11
Diluted	$	0.12	$	0.11

Inventories (Tables)

3 Months Ended

Sep. 30, 2019

Inventory Disclosure [Abstract]

Inventories

Inventories are stated at the lower of cost (first-in, first-out method) or net realizable value and consisted of the following (in millions):

	September 30,		June 30,
	2019		2019
Raw materials and work-in-progress	$	72.1	$	110.7
Finished goods		66.1		48.0
	$	138.2	$	158.7

Acquired Intangibles and Goodwill (Tables)

3 Months Ended

Sep. 30, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Summary of Life, Gross Carrying Value and Related Accumulated Amortization of Acquired Intangible Assets

The following table summarizes the life, the gross carrying value and the related accumulated amortization of our acquired intangible assets as of September 30, 2019 and June 30, 2019 (in millions):

			September 30, 2019							June 30, 2019
	Weighted Average Life in Years		Gross Carrying Value		Accumulated Amortization			Net Carrying Value		Gross Carrying Value		Accumulated Amortization			Net Carrying Value
Display driver technology		5.3	$	164.0	$	(155.9	)	$	8.1	$	164.0	$	(148.1	)	$	15.9
Audio and video technology		5.3		138.6		(56.1	)		82.5		138.6		(49.4	)		89.2
Customer relationships		4.1		81.8		(52.8	)		29.0		81.8		(49.9	)		31.9
Fingerprint authentication technology	Not applicable			—		—			—		47.2		(47.2	)		—
Licensed technology and other		4.2		7.7		(4.1	)		3.6		7.7		(3.6	)		4.1
Patents		8.1		4.4		(2.2	)		2.2		4.4		(2.0	)		2.4
Tradename		7.0		1.8		(0.6	)		1.2		1.8		(0.5	)		1.3
Acquired intangibles, gross		4.9	$	398.3	$	(271.7	)	$	126.6	$	445.5	$	(300.7	)	$	144.8

Schedule of Expected Annual Aggregate Amortization Expense

The following table presents expected annual fiscal year aggregate amortization expense as of September 30, 2019 (in millions):

Remainder of 2020	$	33.2
2021		37.5
2022		32.9
2023		20.4
2024		2.5
2025		0.1
Future amortization	$	126.6

Leases (Tables)

3 Months Ended

Sep. 30, 2019

Leases [Abstract]

Schedule of Components of Leases and Lease Costs

As of September 30, 2019, the components of leases and lease costs are as follows (in millions):

	September 30,
	2019
Operating lease right-of-use assets	$	25.8
Operating lease liabilities	$	8.4
Operating lease liabilities, long-term		17.8
Total operating lease liabilities	$	26.2

Schedule of Supplemental Cash Flow Information Related to Leases

Supplemental cash flow information related to leases is as follows (in millions):

	Three Months Ended
	September 30,
	2019
Cash paid for operating leases included in operating cash flows	$	2.3
Supplemental non-cash information related to lease liabilities arising from obtaining right-of-use assets		2.0

Schedule of Future Minimum Lease Payments for Operating Leases

As of September 30, 2019, the weighted average remaining lease term is 3.8 years, and the weighted average discount rate is 4.21%.

Future minimum lease payments for the operating lease liabilities are as follows (in millions):

	Operating
	Lease
Fiscal Year	Payments
Remainder of 2020	$	7.0
2021		8.5
2022		5.7
2023		3.4
2024		2.0
Thereafter		1.7
Total future minimum operating lease payments		28.3
Less: interest		(2.1	)
Total lease liabilities	$	26.2

Schedule of Aggregate Minimum Rental Commitments for Non-cancelable Operating Leases

	Operating
	Lease
Fiscal Year	Payments
2020	$	7.4
2021		3.2
2022		0.9
2023		0.3
2024		0.1
Total future minimum operating lease payments	$	11.9

Other Accrued Liabilities and Other Long-Term Liabilities (Tables)

3 Months Ended

Sep. 30, 2019

Payables And Accruals [Abstract]

Other Accrued Liabilities

Other accrued liabilities consisted of the following (in millions):

	September 30,		June 30,
	2019		2019
Customer Obligations	$	44.7	$	52.0
Inventory obligations		26.8		26.7
Operating lease liabilities		8.4		—
Warranty		4.0		4.0
Other		23.8		23.4
	$	107.7	$	106.1

Other Long-Term Liabilities

Other long-term liabilities consisted of the following (in millions):

	September 30,		June 30,
	2019		2019
Income taxes payable, long-term	$	16.4	$	16.2
Operating lease liabilities, long-term		17.8		—
Other		15.0		14.1
	$	49.2	$	30.3

Debt (Tables)

3 Months Ended

Sep. 30, 2019

Debt Disclosure [Abstract]

Schedule of Contractual Interest Expense and Amortization of Discount on Notes

The contractual interest expense and amortization of discount on the Notes for the three months ended September 30, 2019, were as follows (in millions):

	Three Months Ended
	September 30,
	2019
Interest expense	$	0.7
Amortization of discount and debt issuance costs		4.5
Total interest	$	5.2

Share-Based Compensation (Tables)

3 Months Ended

Sep. 30, 2019

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Share-Based Compensation and Related Tax Benefit Recognized in Condensed Consolidated Statements of Operations

Share-based compensation and the related tax benefit recognized in our condensed consolidated statements of income were as follows (in millions):

	Three Months Ended
	September 30,
	2019		2018
Cost of revenue	$	0.7	$	0.9
Research and development		7.5		8.3
Selling, general, and administrative		3.0		7.5
Total	$	11.2	$	16.7
Income tax benefit on share-based compensation	$	0.9	$	2.7

Schedule of Stock Option Activity

Stock option activity were as follows:

	Stock			Weighted		Aggregate
	Option			Average		Intrinsic
	Awards			Exercise		Value
	Outstanding			Price		(in millions)
Balance as of June 30, 2019		1,191,929		$	59.07
Granted		—			—
Exercised		(68,057	)		24.54
Forfeited		(75,300	)		65.02
Balance as of September 30, 2019		1,048,572			60.88	$	1.0
Exercisable at September 30, 2019		1,034,044			61.01	$	1.0

Deferred stock units outstanding [Member]

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Schedule of Stock Units Activity

DSU activity were as follows:

				Aggregate
	DSU			Intrinsic
	Awards			Value
	Outstanding			(in millions)
Balance as of June 30, 2019		1,878,853
Granted		200,417
Delivered		(183,256	)
Forfeited		(106,072	)
Balance as of September 30, 2019		1,789,942		$	70.9

Market stock units outstanding [Member]

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Schedule of Stock Units Activity

During the three months ended September 30, 2019, MSU activity and balances as of September 30, 2019 was as follows:

				Aggregate
	MSU			Intrinsic
	Awards			Value
	Outstanding			(in millions)
Balance as of June 30, 2019		210,732
Granted		185,982
Forfeited		(30,928	)
Balance as of September 30, 2019		365,786		$	14.5

Performance stock units outstanding [Member]

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Schedule of Stock Units Activity

During the three months ended September 30, 2019, PSU activity and balances as of September 30, 2019 were as follows:

				Aggregate
	PSU			Intrinsic
	Awards			Value
	Outstanding			(in millions)
Balance as of June 30, 2019		192,618
Forfeited		(29,095	)
Balance as of September 30, 2019		163,523		$	6.5

Segment, Customers, and Geographic Information (Tables)

3 Months Ended

Sep. 30, 2019

Segment Reporting Information [Line Items]

Net Revenue within Geographic Areas Based on Customers' Locations

Net revenue within geographic areas based on our customers’ locations for the periods presented was as follows (in millions):

	Three Months Ended
	September 30,
	2019		2018
China	$	176.8	$	227.8
Taiwan		65.2		76.4
Japan		63.2		68.5
Other		16.5		15.4
South Korea		16.4		20.1
United States		1.8		9.4
	$	339.9	$	417.6

Net Revenue from External Customers

Net revenue from our customers for each group of similar products was as follows (in millions):

	Three Months Ended
	September 30,
	2019		2018
Mobile product applications	$	184.3	$	262.7
PC product applications		67.8		68.6
IoT product applications		87.8		86.3
	$	339.9	$	417.6

Sales Revenue, Net [Member]

Segment Reporting Information [Line Items]

Major Customers as Percentage of Net Revenue

Net revenue from major customers as a percentage of total net revenue for the periods presented was as follows:

	Three Months Ended
	September 30,
	2019	2018
Customer A	12%	11%
Customer B	12%	*
Customer C	*	17%

*	Less than 10%

Accounts Receivable [Member]

Segment Reporting Information [Line Items]

Major Customers as Percentage of Net Revenue

Major customer accounts receivable as a percentage of total accounts receivable were as follows:

	September 30,	June 30,
	2019	2019
Customer A	19%	25%
Customer B	13%	*
Customer C	11%	16%

*	Less than 10%

Restructuring Activities (Tables)

3 Months Ended

Sep. 30, 2019

Restructuring And Related Activities [Abstract]

Restructuring Liability Activities

The restructuring liability for the fiscal 2019 initiated activity during fiscal 2019 and the three months ended September 30, 2019 were as follows (in millions):

	Employee Severance
	and Benefits
Accruals	$	17.7
Cash payments		(12.5	)
Balance as of June 30, 2019		5.2
Accruals		6.6
Cash payments		(6.8	)
Balance as of September 30, 2019	$	5.0

Basis of Presentation - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Accounting Policies [Abstract]
Net gain (loss) on foreign currency transactions	$ 0.4	$ (0.4)
Purchase price included in cash	2.5
Purchase price in contingent consideration	6.5
Assets acquired accrued Contingent Consideration	1.3
Research and development expenses	3.7
Liabilities recorded in acquisition	$ 1.5
Period for amount payable upon meeting milestones	December 2021 through December 2023
Long-term deferred tax asset	$ 0.3

Impact of Recently Adopted Accounting Pronouncements - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
Operating lease right-of-use assets	$ 25.8	$ 27.8
Operating lease, liability	$ 26.2	$ 28.4

Revenue Recognition - Additional Information (Detail) - USD ($)	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Contract asset	$ 1,000,000.0		$ 900,000
Contract liability	6,400,000		4,500,000
Refund liability	38,300,000		$ 47,500,000
Revenue recognized related to contract liabilities	$ 200,000	$ 400,000
Description of payment terms in contract with customer	Payments are generally due within three months upon completion of the performance obligation and subsequent invoicing and therefore, do not include significant financing components.
Accounting Standards Update 2014-09 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Remaining unsatisfied performance obligation	$ 0
Maximum [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, performance obligation, payment terms	3 months

Net Income Per Share - Computation of Basic and Diluted Net Income Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Numerator:
Net income	$ 4.0	$ 3.8
Denominator:
Shares, basic	33.0	35.1
Effect of dilutive share-based awards	0.6	1.0
Shares, diluted	33.6	36.1
Net income per share:
Basic	$ 0.12	$ 0.11
Diluted	$ 0.12	$ 0.11

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Net Income Per Share - Additional Information (Detail) - shares	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Share-Based Awards [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common shares that were not included in computation of diluted net income per share	1,340,521	1,357,565

Fair Value - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019
Level 1 [Member] \| Money Market Funds [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale securities, debt securities	$ 331.0	$ 313.7

Inventories - Inventories (Detail) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019
Inventory Disclosure [Abstract]
Raw materials and work-in-progress	$ 72.1	$ 110.7
Finished goods	66.1	48.0
Total Inventories	$ 138.2	$ 158.7

Acquired Intangibles and Goodwill - Summary of Life, Gross Carrying Value and Related Accumulated Amortization of Acquired Intangible Assets (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Jun. 30, 2019
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value	$ 398.3	$ 445.5
Acquired intangibles, Accumulated Amortization	(271.7)	(300.7)
Acquired intangibles, Net Carrying Value	$ 126.6	144.8
Weighted Average Life in Years	4 years 10 months 24 days
Display Driver Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value	$ 164.0	164.0
Acquired intangibles, Accumulated Amortization	(155.9)	(148.1)
Acquired intangibles, Net Carrying Value	$ 8.1	15.9
Weighted Average Life in Years	5 years 3 months 18 days
Audio and Video Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value	$ 138.6	138.6
Acquired intangibles, Accumulated Amortization	(56.1)	(49.4)
Acquired intangibles, Net Carrying Value	$ 82.5	89.2
Weighted Average Life in Years	5 years 3 months 18 days
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value	$ 81.8	81.8
Acquired intangibles, Accumulated Amortization	(52.8)	(49.9)
Acquired intangibles, Net Carrying Value	$ 29.0	31.9
Weighted Average Life in Years	4 years 1 month 6 days
Fingerprint Authentication Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value		47.2
Acquired intangibles, Accumulated Amortization		(47.2)
Licensed Technology and Other [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value	$ 7.7	7.7
Acquired intangibles, Accumulated Amortization	(4.1)	(3.6)
Acquired intangibles, Net Carrying Value	$ 3.6	4.1
Weighted Average Life in Years	4 years 2 months 12 days
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value	$ 4.4	4.4
Acquired intangibles, Accumulated Amortization	(2.2)	(2.0)
Acquired intangibles, Net Carrying Value	$ 2.2	2.4
Weighted Average Life in Years	8 years 1 month 6 days
Tradename [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value	$ 1.8	1.8
Acquired intangibles, Accumulated Amortization	(0.6)	(0.5)
Acquired intangibles, Net Carrying Value	$ 1.2	$ 1.3
Weighted Average Life in Years	7 years

Acquired Intangibles and Goodwill - Additional Information (Detail) - USD ($)	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles amortization	$ 18,200,000	$ 20,000,000.0
Changes in goodwill	0
Cost of Revenue [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles amortization	$ 15,300,000	$ 17,000,000.0

Acquired Intangibles and Goodwill - Schedule of Expected Annual Aggregate Amortization Expense (Detail) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Remainder of 2020	$ 33.2
2021	37.5
2022	32.9
2023	20.4
2024	2.5
2025	0.1
Acquired intangibles, Net Carrying Value	$ 126.6	$ 144.8

Leases - Additional Information (Detail) $ in Millions	3 Months Ended
Leases - Additional Information (Detail) $ in Millions	Sep. 30, 2019 USD ($)
Lessee Lease Description [Line Items]
Lease Option to Extend	The leases expire at various dates through fiscal year 2026, some of which include options to extend the lease for up to 5 years.
Lease Expiration Year.	2026
Lessee, Operating Lease, Existence of Option to Extend	true
Operating Lease, Expense	$ 2.3
Operating Lease, Weighted Average Remaining Lease Term	3 years 9 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	4.21%
Maximum [Member]
Lessee Lease Description [Line Items]
Duration of Extending leases	5 years

Leases - Schedule of Components of Leases and Lease Costs (Details) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019
Leases [Abstract]
Operating lease right-of-use assets	$ 25.8	$ 27.8
Operating lease liabilities	8.4
Operating lease liabilities, long-term	17.8
Total operating lease liabilities	$ 26.2

Leases - Schedule of Supplemental Cash Flow Information Related to Leases (Details) $ in Millions	3 Months Ended
	Sep. 30, 2019 USD ($)
Leases [Abstract]
Cash paid for operating leases included in operating cash flows	$ 2.3
Supplemental non-cash information related to lease liabilities arising from obtaining right-of-use assets	$ 2.0

Leases - Schedule of Future Minimum Lease Payments for Operating Leases (Details) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019
Leases [Abstract]
Remainder of 2020	$ 7.0
2021	8.5
2022	5.7
2023	3.4
2024	2.0
Thereafter	1.7
Total	28.3
Less: interest	(2.1)
Total lease liabilities	26.2	$ 28.4
Total	$ 11.9

Leases - Aggregate Minimum Rental Commitments for Non-cancelable Operating Leases (Details) $ in Millions	Sep. 30, 2019 USD ($)
Leases [Abstract]
2020	$ 7.4
2021	3.2
2022	0.9
2023	0.3
2024	0.1
Total	$ 11.9

Other Accrued Liabilities and Other Long-Term Liabilities - Other Accrued Liabilities (Detail) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019
Payables And Accruals [Abstract]
Customer Obligations	$ 44.7	$ 52.0
Inventory obligations	26.8	26.7
Operating lease liabilities	8.4
Warranty	4.0	4.0
Other	23.8	23.4
Other accrued liabilities	$ 107.7	$ 106.1

Other Accrued Liabilities and Other Long-Term Liabilities - Other Long-Term Liabilities (Detail) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019
Payables And Accruals [Abstract]
Income taxes payable, long-term	$ 16.4	$ 16.2
Operating lease liabilities, long-term	17.8
Other	15.0	14.1
Other long-term liabilities	$ 49.2	$ 30.3

Debt - Additional Information (Detail)	3 Months Ended
Debt - Additional Information (Detail)	Sep. 30, 2019 USD ($) Day $ / shares shares	Sep. 30, 2017 USD ($)
Debt Instrument [Line Items]
Percentage of voting capital stock	65.00%
0.50% Convertible Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Debt instrument aggregate principal amounts	$ 525,000,000
Net proceeds from issuance of convertible debt	$ 514,500,000
Interest rates on borrowings	0.50%
Debt instrument maturity date	Jun. 15, 2022
Conversion of notes in multiples of principal amounts	$ 1,000
Convertible number of shares, principal amount of notes \| shares	13.6947
Initial conversion price per share of common stock \| $ / shares	$ 73.02
Note repurchase price, percentage of principal amount of notes	100.00%
Sale price of common stock, minimum threshold percentage	130.00%
Sale of common stock, threshold trading days \| Day	20
Sale of common stock, threshold consecutive trading days \| Day	30
Equity component of the principal amount of the convertible debt	$ 82,100,000
Nonconvertible debt borrowing rate	4.39%
Debt instrument term	5 years
Debt issuance costs	$ 11,100,000
Initial purchaser's discount	10,500,000
Legal, accounting, and printing costs	579,000
Convertible debt issuance costs pro rata to equity components	1,900,000
Convertible debt issuance costs pro rata to debt components	$ 9,200,000
Debt amortization period	5 years
Unamortized amounts of debt issuance costs	$ 5,200,000
Unamortized amounts of debt discount	$ 47,000,000.0
Amendment and Restatement Agreement [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt amortization period	60 months
Line of credit facility amount		$ 200,000,000
Line of credit facility allowable requests for additional borrowing		100,000,000
Outstanding principal amount	$ 0
Maturity period	Sep. 27, 2022
Repayment date, description	The revolving credit facility is required to be repaid in full on the earlier of (i) September 27, 2022, and (ii) the date 91 days prior to the Maturity Date of the Notes if the Notes have not been refinanced in full by such date.
Debt issuance cost	$ 2,300,000
Description of base rate	The revolving credit facility bears interest at our election of a Base Rate plus an Applicable Margin or LIBOR plus an Applicable Margin. Swingline loans bear interest at a Base Rate plus an Applicable Margin. The Base Rate is a floating rate that is the greater of the Prime Rate, the Federal Funds Rate plus 50 basis points, or LIBOR plus 100 basis points. The Applicable Margin is based on a sliding scale which ranges from 0.25 to 100 basis points for Base Rate loans and 100 basis points to 175 basis points for LIBOR loans.
Covenant description	Under the Agreement, there are various restrictive covenants, including three financial covenants which limit the consolidated total leverage ratio, or leverage ratio, the consolidated interest coverage ratio, or interest coverage ratio, a restriction which places a limit on the amount of capital expenditures that may be made in any fiscal year, a restriction that permits up to $50 million per fiscal quarter of accounts receivable financings, and sets the Specified Leverage Ratio. The leverage ratio is the ratio of debt as of the measurement date to earnings before interest, taxes, depreciation and amortization, or EBITDA, for the four consecutive quarters ending with the quarter of measurement. The current leverage ratio shall not exceed 3.50 to 1.00 provided that for the four fiscal quarters ending after the date of a material acquisition, such maximum leverage ratio shall be adjusted to 3.75 to 1.00, and thereafter, shall not be more than 3.50 to 1.00. The interest coverage ratio is EBITDA to interest expense for the four consecutive quarters ending with the quarter of measurement. The interest coverage ratio must not be less than 3.50 to 1.0 during the term of the Agreement. The Specified Leverage Ratio is the ratio used in determining, among other things, whether we are permitted to make dividends and/or prepay certain indebtedness, at a fixed ratio of 3.00 to 1.00. As of the end of the fiscal quarter, we were in compliance with the restrictive covenants
Maximum accounts receivable financings per quarter	$ 50,000,000
Maximum leverage ratio permitted	3.50%
Minimum interest coverage ratio	3.50%
Fixed coverage ratio	3.00%
Amendment and Restatement Agreement [Member] \| Revolving Credit Facility [Member] \| For The First Four Fiscal Quarters Ending After Date of Material Acquisition [Member]
Debt Instrument [Line Items]
Maximum leverage ratio permitted	3.75%
Amendment and Restatement Agreement [Member] \| Revolving Credit Facility [Member] \| Thereafter [Member]
Debt Instrument [Line Items]
Maximum leverage ratio permitted	3.50%
Amendment and Restatement Agreement [Member] \| Revolving Credit Facility [Member] \| Federal Funds Rates [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
Amendment and Restatement Agreement [Member] \| Revolving Credit Facility [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
Amendment and Restatement Agreement [Member] \| Revolving Credit Facility [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Commitment fee percentage of unused portion	0.175%
Amendment and Restatement Agreement [Member] \| Revolving Credit Facility [Member] \| Minimum [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
Amendment and Restatement Agreement [Member] \| Revolving Credit Facility [Member] \| Minimum [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.0025%
Amendment and Restatement Agreement [Member] \| Revolving Credit Facility [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Commitment fee percentage of unused portion	0.25%
Amendment and Restatement Agreement [Member] \| Revolving Credit Facility [Member] \| Maximum [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.75%
Amendment and Restatement Agreement [Member] \| Revolving Credit Facility [Member] \| Maximum [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
Amendment and Restatement Agreement [Member] \| Letter of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility amount		20,000,000
Amendment and Restatement Agreement [Member] \| Bridge Loan [Member]
Debt Instrument [Line Items]
Line of credit facility amount		$ 20,000,000

Debt - Schedule of Contractual Interest Expense and Amortization of Discount on Notes (Detail) - 0.50% Convertible Senior Notes due 2022 [Member] $ in Millions	3 Months Ended
	Sep. 30, 2019 USD ($)
Debt Instrument [Line Items]
Interest expense	$ 0.7
Amortization of discount and debt issuance costs	4.5
Total interest	$ 5.2

Share-Based Compensation - Share-Based Compensation and Related Tax Benefit Recognized in Condensed Consolidated Statements of Operations (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total	$ 11.2	$ 16.7
Income tax benefit on share-based compensation	0.9	2.7
Cost of Revenue [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total	0.7	0.9
Research and Development [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total	7.5	8.3
Selling, General, and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total	$ 3.0	$ 7.5

Share-Based Compensation - Schedule of Stock Option Activity (Detail) $ / shares in Units, $ in Millions	3 Months Ended
	Sep. 30, 2019 USD ($) $ / shares shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock Option Awards Outstanding, Balance as of June 30, 2019 \| shares	1,191,929
Stock Option Awards Outstanding, Exercised \| shares	(68,057)
Stock Option Awards Outstanding, Forfeited \| shares	(75,300)
Stock Option Awards Outstanding, Balance as of September 30, 2019 \| shares	1,048,572
Stock Option Awards Outstanding, Exercisable at September 30, 2019 \| shares	1,034,044
Weighted Average Exercise Price, Balance as of June 30, 2019 \| $ / shares	$ 59.07
Weighted Average Exercise Price, Exercised \| $ / shares	24.54
Weighted Average Exercise Price, Forfeited \| $ / shares	65.02
Weighted Average Exercise Price, Balance as of September 30, 2019 \| $ / shares	60.88
Weighted Average Exercise Price, Exercisable at September 30, 2019 \| $ / shares	$ 61.01
Aggregate Intrinsic Value, Balance as of September 30, 2019 \| $	$ 1.0
Aggregate Intrinsic Value, Exercisable at September 30, 2019 \| $	$ 1.0

Share-Based Compensation - Stock Options - Additional Information (Detail)	Sep. 27, 2019 $ / shares
Stock option outstanding [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Closing price of common stock used to calculate Aggregate intrinsic value of stock option outstanding	$ 39.62

Share-Based Compensation - Schedule of Stock Units Activity (Detail) $ in Millions	3 Months Ended
	Sep. 30, 2019 USD ($) shares
Deferred stock units outstanding [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock Unit Awards Outstanding, Balance as of June 30, 2019	1,878,853
Stock Unit Awards, Granted	200,417
Stock Unit Awards, Delivered	(183,256)
Stock Unit Awards, Forfeited	(106,072)
Stock Unit Awards Outstanding, Balance as of September 30, 2019	1,789,942
Aggregate Intrinsic Value, Balance as of September 30, 2019 \| $	$ 70.9
Market stock units outstanding [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock Unit Awards Outstanding, Balance as of June 30, 2019	210,732
Stock Unit Awards, Granted	185,982
Stock Unit Awards, Forfeited	(30,928)
Stock Unit Awards Outstanding, Balance as of September 30, 2019	365,786
Aggregate Intrinsic Value, Balance as of September 30, 2019 \| $	$ 14.5
Performance stock units outstanding [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock Unit Awards Outstanding, Balance as of June 30, 2019	192,618
Stock Unit Awards, Forfeited	(29,095)
Stock Unit Awards Outstanding, Balance as of September 30, 2019	163,523
Aggregate Intrinsic Value, Balance as of September 30, 2019 \| $	$ 6.5

Share-Based Compensation - Deferred Stock Units - Additional Information (Detail) - Deferred stock units outstanding [Member] - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 27, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Closing price of common stock used to calculate Aggregate intrinsic value of stock option outstanding		$ 39.62
Shares withheld to meet statutory minimum tax withholding requirements	42,740
Shares valued withheld to meet statutory minimum tax withholding requirements	$ 1.5

Share-Based Compensation - Market Stock Units - Additional Information (Detail) - Market stock units outstanding [Member] - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 27, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout adjustment ratio	200.00%
Closing price of common stock used to calculate Aggregate intrinsic value of stock option outstanding		$ 39.62
Unrecognized share-based compensation cost	$ 14.5
Unrecognized share-based compensation, period for recognition	1 year 7 months 6 days
Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout range	0.00%
Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout range	200.00%
Share-based Compensation Award, First Tranche [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period of the underlying awards	1 year
Vesting percentage of the underlying awards	33.33%
Share-based Compensation Award, First Tranche [Member] \| Maximum [Member] \| Three Year Performance
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout range	100.00%
Share-based Compensation Award, First Tranche [Member] \| Maximum [Member] \| Four Year Performance
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout range	100.00%
Share-based Compensation Award, Second Tranche [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period of the underlying awards	2 years
Vesting percentage of the underlying awards	33.33%
Share-based Compensation Award, Second Tranche [Member] \| Maximum [Member] \| Three Year Performance
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout range	100.00%
Share-based Compensation Award, Second Tranche [Member] \| Maximum [Member] \| Four Year Performance
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout range	100.00%
Share-based Compensation Award, Third Tranche [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period of the underlying awards	3 years
Vesting percentage of the underlying awards	33.33%
Share-based Compensation Award, Third Tranche [Member] \| Maximum [Member] \| Four Year Performance
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout range	100.00%
Share-based Compensation Award, Fourth Tranche [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period of the underlying awards	4 years
Vesting percentage of the underlying awards	25.00%

Share-Based Compensation - Performance Stock Units - Additional Information (Detail) - Performance stock units outstanding [Member] - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 27, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period of the underlying awards	3 years
Vesting percentage of the underlying awards	33.33%
Closing price of common stock used to calculate Aggregate intrinsic value of stock option outstanding		$ 39.62
Requisite service period	3 years
Unrecognized share-based compensation cost	$ 1.3
Unrecognized share-based compensation, period for recognition	9 months 18 days
Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout range	0.00%
Threshold percentage of earnings per share to trigger pay out	65.00%
Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout range	200.00%
Threshold percentage of earnings per share to trigger pay out	135.00%

Share-Based Compensation - Employee Stock Purchase Plan - Additional Information (Detail)	3 Months Ended
	Sep. 30, 2019 shares
Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares purchased	0

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019
Income Tax Disclosure [Line Items]
Provision/(benefit) for income taxes	$ (4.9)	$ (0.3)
Gross unrecognized tax benefits	20.1		$ 18.9
Gross unrecognized tax benefits increased (decreased) during the year	1.2
Interest and penalties accrued related to unrecognized tax benefits	1.7
Increase (decrease) in interest and penalties accrued related to unrecognized tax benefits			$ (0.2)
Maximum [Member]
Income Tax Disclosure [Line Items]
Estimated increase in unrecognized tax benefit in next twelve months	$ 2.5

Segment, Customers, and Geographic Information - Additional Information (Detail)	3 Months Ended
	Sep. 30, 2019 Segment Product
Segment Reporting [Abstract]
Number of operating segments \| Segment	1
Number of product \| Product	3

Segment, Customers, and Geographic Information - Net Revenue within Geographic Areas Based on Customers' Locations (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	$ 339.9	$ 417.6
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	176.8	227.8
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	63.2	68.5
Taiwan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	65.2	76.4
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	16.5	15.4
South Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	16.4	20.1
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	$ 1.8	$ 9.4

Segment, Customers, and Geographic Information - Net Revenue from External Customers (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Revenue from External Customer [Line Items]
Net revenue	$ 339.9	$ 417.6
Mobile Product Applications [Member]
Revenue from External Customer [Line Items]
Net revenue	184.3	262.7
PC Product Applications [Member]
Revenue from External Customer [Line Items]
Net revenue	67.8	68.6
Internet of Things Product Applications [Member]
Revenue from External Customer [Line Items]
Net revenue	$ 87.8	$ 86.3

Segment, Customers, and Geographic Information - Major Customers as Percentage of Net Revenue (Detail) - Sales Revenue, Net [Member] - Customer Concentration Risk [Member]	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Customer A [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	12.00%	11.00%
Customer B [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	12.00%
Customer C [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage		17.00%

Segment, Customers, and Geographic Information - Major Customers as Percentage of Net Revenue (Parenthetical) (Detail)	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Customer Concentration Risk [Member] \| Sales Revenue, Net [Member] \| Maximum [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	10.00%	10.00%

Segment, Customers, and Geographic Information - Major Customer Accounts Receivable as Percentage of Accounts Receivable (Detail) - Accounts Receivable [Member] - Credit Concentration Risk [Member]	3 Months Ended	12 Months Ended
	Sep. 30, 2019	Jun. 30, 2019
Customer A [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	19.00%	25.00%
Customer B [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	13.00%
Customer C [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	11.00%	16.00%

Segment, Customers, and Geographic Information - Major Customer Accounts Receivable as Percentage of Accounts Receivable (Parenthetical) (Detail)	3 Months Ended	12 Months Ended
	Sep. 30, 2019	Jun. 30, 2019
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Maximum [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	10.00%	10.00%

Restructuring Activities - Restructuring Liability Activities (Detail) - 2019 Restructuring Plan [Member] - Employee Severance and Benefits [Member] - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2019	Jun. 30, 2019
Restructuring Cost And Reserve [Line Items]
Beginning Balance	$ 5.2
Additional accruals	6.6	$ 17.7
Cash payments	(6.8)	(12.5)
Ending Balance	$ 5.0	$ 5.2

Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Sep. 28, 2019	Nov. 01, 2019
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 28, 2019
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Trading Symbol	SYNA
Entity Registrant Name	SYNAPTICS Inc
Entity Central Index Key	0000817720
Current Fiscal Year End Date	--06-27
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		33,464,178
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Title of 12(b) Security	Common Stock, par value $.001 per share
Security Exchange Name	NASDAQ
Entity File Number	000-49602
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	77-0118518
Entity Address, Address Line One	1251 McKay Drive
Entity Address, City or Town	San Jose
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95131
City Area Code	408
Local Phone Number	904-1100
Document Quarterly Report	true
Document Transition Report	false

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019
Current Assets:
Cash and cash equivalents	$ 350.8	$ 327.8
Accounts receivable, net of allowances of $2.1 at September 30, and June 30, 2019	232.2	230.0
Inventories	138.2	158.7
Prepaid expenses and other current assets	15.9	14.6
Total current assets	737.1	731.1
Property and equipment at cost, net of accumulated depreciation of $140.0 and $133.1 at September 30, 2019 and June 30, 2019, respectively	98.8	103.0
Goodwill	372.8	372.8
Acquired intangibles, net	126.6	144.8
Non-current other assets	89.0	58.1
Total assets	1,424.3	1,409.8
Current Liabilities:
Accounts payable	99.0	98.3
Accrued compensation	31.3	30.4
Income taxes payable	9.5	19.1
Other accrued liabilities	107.7	106.1
Total current liabilities	247.5	253.9
Convertible notes, net	472.8	468.3
Other long-term liabilities	49.2	30.3
Total liabilities	769.5	752.5
Stockholders' Equity:
Common stock $0.001 par value; 120,000,000 shares authorized, 64,493,058 and 64,283,948 shares issued, and 33,003,182 and 33,349,735 shares outstanding, at September 30, 2019 and June 30, 2019, respectively	0.1	0.1
Additional paid-in capital	1,277.5	1,266.1
Treasury stock: 31,489,876 and 30,934,213 common treasury shares at September 30, 2019 and June 30, 2019, respectively, at cost	(1,209.4)	(1,192.4)
Retained earnings	586.6	583.5
Total stockholders' equity	654.8	657.3
Liabilities and stockholders' equity	$ 1,424.3	$ 1,409.8

Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts receivable	$ 2.1	$ 2.1
Property and equipment, accumulated depreciation	$ 140.0	$ 133.1
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	120,000,000	120,000,000
Common stock, shares issued	64,493,058	64,283,948
Common stock, shares outstanding	33,003,182	33,349,735
Common treasury shares	31,489,876	30,934,213

Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Net revenue	$ 339.9	$ 417.6
Cost of revenue	213.7	276.7
Gross margin	126.2	140.9
Operating expenses:
Research and development	86.0	90.0
Selling, general, and administrative	27.5	33.9
Acquired intangibles amortization	2.9	2.9
Restructuring costs	6.6	8.3
Total operating expenses	123.0	135.1
Operating income	3.2	5.8
Interest and other expense, net	(3.6)	(1.9)
Income/(loss) before provision/(benefit) for income taxes and equity investment loss	(0.4)	3.9
Provision/(benefit) for income taxes	(4.9)	(0.3)
Equity investment loss	(0.5)	(0.4)
Net income	$ 4.0	$ 3.8
Net income per share:
Basic	$ 0.12	$ 0.11
Diluted	$ 0.12	$ 0.11
Shares used in computing net income per share:
Basic	33.0	35.1
Diluted	33.6	36.1

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 4.0	$ 3.8
Other comprehensive income:
Change in unrealized net gain on investment		(1.5)
Comprehensive income	$ 4.0	$ 2.3

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Millions	Total	As Adjusted [Member]	Common Stock [Member]	Common Stock [Member] As Adjusted [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] As Adjusted [Member]	Treasury Stock [Member]	Treasury Stock [Member] As Adjusted [Member]	Retained Earnings [Member]	Retained Earnings [Member] As Adjusted [Member]	Accumulated Other Comprehensive Income [Member]
Balance, value at Jun. 30, 2018	$ 729.3		$ 0.1		$ 1,195.2		$ (1,073.9)		$ 606.4		$ 1.5
Balance, shares at Jun. 30, 2018			62,889,679
Net income	3.8								3.8
Other comprehensive income	(1.5)										$ (1.5)
Issuance of common stock for share- based award compensation plans	2.1				2.1
Issuance of common stock for share-based award compensation plans, shares			140,379
Payroll taxes for deferred stock units	(0.9)				(0.9)
Purchases of treasury stock	(39.4)						(39.4)
Share-based compensation	16.7				16.7
Balance, value at Sep. 30, 2018	710.1		$ 0.1		1,213.1		(1,113.3)		610.2
Balance, shares at Sep. 30, 2018			63,030,058
Balance, value at Jun. 30, 2019	657.3	$ 656.4	$ 0.1	$ 0.1	1,266.1	$ 1,266.1	(1,192.4)	$ (1,192.4)	583.5	$ 582.6
Balance, shares at Jun. 30, 2019			64,283,948	64,283,948
Cumulative effect of changes in accounting principles at Jun. 30, 2019	(0.9)								(0.9)
Net income	4.0								4.0
Issuance of common stock for share- based award compensation plans	1.7				1.7
Issuance of common stock for share-based award compensation plans, shares			209,110
Payroll taxes for deferred stock units	(1.5)				(1.5)
Purchases of treasury stock	(17.0)						(17.0)
Share-based compensation	11.2				11.2
Balance, value at Sep. 30, 2019	$ 654.8		$ 0.1		$ 1,277.5		$ (1,209.4)		$ 586.6
Balance, shares at Sep. 30, 2019			64,493,058

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities
Net income	$ 4.0	$ 3.8
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation costs	11.2	16.7
Depreciation and amortization	7.2	10.0
Acquired intangibles amortization	18.2	20.0
Deferred taxes	(2.4)	(5.6)
Amortization of convertible debt discount and issuance costs	4.5	4.4
Amortization of debt issuance costs	0.1	0.1
Impairment recovery on investments		(2.8)
Acquired in-process research and development	3.7
Arbitration settlement		(1.9)
Equity investment loss	0.5	0.4
Foreign currency remeasurement loss		0.1
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable, net	(2.2)	(38.3)
Inventories	20.5	(30.0)
Prepaid expenses and other current assets	(1.9)	(13.8)
Other assets	(1.0)	1.1
Accounts payable	2.6	22.3
Accrued compensation	0.9	(1.6)
Income taxes payable	(9.4)	3.7
Other accrued liabilities	(9.2)	16.0
Net cash provided by operating activities	47.3	4.6
Cash flows from investing activities
Purchase of in-process research and development	(2.5)
Proceeds from sales of investments		2.8
Purchases of property and equipment	(5.0)	(6.8)
Net cash used in investing activities	(7.5)	(4.0)
Cash flows from financing activities
Purchases of treasury stock	(17.0)	(39.4)
Proceeds from issuance of shares	1.7	2.1
Payroll taxes for deferred stock and market stock units	(1.5)	(0.9)
Net cash used in financing activities	(16.8)	(38.2)
Effect of exchange rate changes on cash and cash equivalents		(0.1)
Net increase/(decrease) in cash and cash equivalents	23.0	(37.7)
Cash and cash equivalents at beginning of period	327.8	301.0
Cash and cash equivalents at end of period	350.8	263.3
Supplemental disclosures of cash flow information
Cash paid for taxes	7.1	1.7
Non-cash investing and financing activities:
Purchases of property and equipment in current liabilities	$ 1.9	$ 2.9

Basis of Presentation

3 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Basis of Presentation

1. Basis of Presentation

Use of Estimates

Foreign Currency Transactions and Foreign Exchange Contracts

Leases

Asset Acquisition

Impact of Recently Adopted Accounting Pronouncements

3 Months Ended

Sep. 30, 2019

New Accounting Pronouncements And Changes In Accounting Principles [Abstract]

Impact of Recently Adopted Accounting Pronouncements

2. Impact of Recently Adopted Accounting Pronouncements

The adoption of this new standard at June 30, 2019, resulted in the following changes:

•

assets increased by $27.8 million, primarily representing the recognition of ROU assets for operating leases; and

•

liabilities increased by $28.4 million, primarily representing the recognition of lease liabilities for operating leases.

Revenue Recognition

3 Months Ended

Sep. 30, 2019

Revenue From Contract With Customer [Abstract]

Revenue Recognition

3. Revenue Recognition

Net Income Per Share

3 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Net Income Per Share

4. Net Income Per Share

The computation of basic and diluted net income per share was as follows (in millions, except per share data):

	Three Months Ended
	September 30,
	2019		2018
Numerator:
Net income	$	4.0	$	3.8
Denominator:
Shares, basic		33.0		35.1
Effect of dilutive share-based awards		0.6		1.0
Shares, diluted		33.6		36.1
Net income per share:
Basic	$	0.12	$	0.11
Diluted	$	0.12	$	0.11

Fair Value

3 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

Fair Value

5. Fair Value

- Definition

+ References + Details

Inventories

3 Months Ended

Sep. 30, 2019

Inventory Disclosure [Abstract]

Inventories

6. Inventories

Inventories are stated at the lower of cost (first-in, first-out method) or net realizable value and consisted of the following (in millions):

	September 30,		June 30,
	2019		2019
Raw materials and work-in-progress	$	72.1	$	110.7
Finished goods		66.1		48.0
	$	138.2	$	158.7

Acquired Intangibles and Goodwill

3 Months Ended

Sep. 30, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Acquired Intangibles and Goodwill

7. Acquired Intangibles and Goodwill

Acquired Intangibles

The following table summarizes the life, the gross carrying value and the related accumulated amortization of our acquired intangible assets as of September 30, 2019 and June 30, 2019 (in millions):

			September 30, 2019							June 30, 2019
	Weighted Average Life in Years		Gross Carrying Value		Accumulated Amortization			Net Carrying Value		Gross Carrying Value		Accumulated Amortization			Net Carrying Value
Display driver technology		5.3	$	164.0	$	(155.9	)	$	8.1	$	164.0	$	(148.1	)	$	15.9
Audio and video technology		5.3		138.6		(56.1	)		82.5		138.6		(49.4	)		89.2
Customer relationships		4.1		81.8		(52.8	)		29.0		81.8		(49.9	)		31.9
Fingerprint authentication technology	Not applicable			—		—			—		47.2		(47.2	)		—
Licensed technology and other		4.2		7.7		(4.1	)		3.6		7.7		(3.6	)		4.1
Patents		8.1		4.4		(2.2	)		2.2		4.4		(2.0	)		2.4
Tradename		7.0		1.8		(0.6	)		1.2		1.8		(0.5	)		1.3
Acquired intangibles, gross		4.9	$	398.3	$	(271.7	)	$	126.6	$	445.5	$	(300.7	)	$	144.8

The following table presents expected annual fiscal year aggregate amortization expense as of September 30, 2019 (in millions):

Remainder of 2020	$	33.2
2021		37.5
2022		32.9
2023		20.4
2024		2.5
2025		0.1
Future amortization	$	126.6

Goodwill

Leases

3 Months Ended

Sep. 30, 2019

Leases [Abstract]

Leases

8. Leases

As of September 30, 2019, the components of leases and lease costs are as follows (in millions):

	September 30,
	2019
Operating lease right-of-use assets	$	25.8
Operating lease liabilities	$	8.4
Operating lease liabilities, long-term		17.8
Total operating lease liabilities	$	26.2

Supplemental cash flow information related to leases is as follows (in millions):

	Three Months Ended
	September 30,
	2019
Cash paid for operating leases included in operating cash flows	$	2.3
Supplemental non-cash information related to lease liabilities arising from obtaining right-of-use assets		2.0

As of September 30, 2019, the weighted average remaining lease term is 3.8 years, and the weighted average discount rate is 4.21%.

Future minimum lease payments for the operating lease liabilities are as follows (in millions):

	Operating
	Lease
Fiscal Year	Payments
Remainder of 2020	$	7.0
2021		8.5
2022		5.7
2023		3.4
2024		2.0
Thereafter		1.7
Total future minimum operating lease payments		28.3
Less: interest		(2.1	)
Total lease liabilities	$	26.2

	Operating
	Lease
Fiscal Year	Payments
2020	$	7.4
2021		3.2
2022		0.9
2023		0.3
2024		0.1
Total future minimum operating lease payments	$	11.9

Other Accrued Liabilities and Other Long-Term Liabilities

3 Months Ended

Sep. 30, 2019

Payables And Accruals [Abstract]

Other Accrued Liabilities and Other Long-Term Liabilities

9. Other Accrued Liabilities and Other Long-Term Liabilities

Other accrued liabilities consisted of the following (in millions):

	September 30,		June 30,
	2019		2019
Customer Obligations	$	44.7	$	52.0
Inventory obligations		26.8		26.7
Operating lease liabilities		8.4		—
Warranty		4.0		4.0
Other		23.8		23.4
	$	107.7	$	106.1

Other long-term liabilities consisted of the following (in millions):

	September 30,		June 30,
	2019		2019
Income taxes payable, long-term	$	16.4	$	16.2
Operating lease liabilities, long-term		17.8		—
Other		15.0		14.1
	$	49.2	$	30.3

Indemnifications and Contingencies

3 Months Ended

Sep. 30, 2019

Commitments And Contingencies Disclosure [Abstract]

Indemnifications and Contingencies

10. Indemnifications and Contingencies

Indemnifications

Contingencies

Debt

3 Months Ended

Sep. 30, 2019

Debt Disclosure [Abstract]

Debt

11. Debt

Convertible Debt

The Notes mature on June 15, 2022, or the Maturity Date, unless earlier repurchased, redeemed or converted.

The contractual interest expense and amortization of discount on the Notes for the three months ended September 30, 2019, were as follows (in millions):

	Three Months Ended
	September 30,
	2019
Interest expense	$	0.7
Amortization of discount and debt issuance costs		4.5
Total interest	$	5.2

The unamortized amounts of the debt issuance costs and discount associated with the Notes as of September 30, 2019 were $5.2 million and $47.0 million, respectively.

Revolving Credit Facility

Share-Based Compensation

3 Months Ended

Sep. 30, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Share-Based Compensation

12. Share-Based Compensation

Share-based compensation and the related tax benefit recognized in our condensed consolidated statements of income were as follows (in millions):

	Three Months Ended
	September 30,
	2019		2018
Cost of revenue	$	0.7	$	0.9
Research and development		7.5		8.3
Selling, general, and administrative		3.0		7.5
Total	$	11.2	$	16.7
Income tax benefit on share-based compensation	$	0.9	$	2.7

Stock Options

Stock option activity were as follows:

	Stock			Weighted		Aggregate
	Option			Average		Intrinsic
	Awards			Exercise		Value
	Outstanding			Price		(in millions)
Balance as of June 30, 2019		1,191,929		$	59.07
Granted		—			—
Exercised		(68,057	)		24.54
Forfeited		(75,300	)		65.02
Balance as of September 30, 2019		1,048,572			60.88	$	1.0
Exercisable at September 30, 2019		1,034,044			61.01	$	1.0

The aggregate intrinsic value was determined using the closing price of our common stock on September 27, 2019 of $39.62 and excludes the impact of stock options that were not in-the-money.

Deferred Stock Units

DSU activity were as follows:

				Aggregate
	DSU			Intrinsic
	Awards			Value
	Outstanding			(in millions)
Balance as of June 30, 2019		1,878,853
Granted		200,417
Delivered		(183,256	)
Forfeited		(106,072	)
Balance as of September 30, 2019		1,789,942		$	70.9

The aggregate intrinsic value was determined using the closing price of our common stock on September 27, 2019 of $39.62.

Of the shares delivered, 42,740 shares valued at $1.5 million were withheld to meet statutory tax withholding requirements.

Market Stock Units

(100% + ([Synaptics TSR — {SPSISC Index TSR or SOX Index TSR}] x 2))

During the three months ended September 30, 2019, MSU activity and balances as of September 30, 2019 was as follows:

				Aggregate
	MSU			Intrinsic
	Awards			Value
	Outstanding			(in millions)
Balance as of June 30, 2019		210,732
Granted		185,982
Forfeited		(30,928	)
Balance as of September 30, 2019		365,786		$	14.5

The aggregate intrinsic value was determined using the closing price of our common stock on September 27, 2019 of $39.62.

Performance Stock Units

During the three months ended September 30, 2019, PSU activity and balances as of September 30, 2019 were as follows:

				Aggregate
	PSU			Intrinsic
	Awards			Value
	Outstanding			(in millions)
Balance as of June 30, 2019		192,618
Forfeited		(29,095	)
Balance as of September 30, 2019		163,523		$	6.5

The aggregate intrinsic value was determined using the closing price of our common stock on September 27, 2019 of $39.62.

Employee Stock Purchase Plan

There were no employee stock purchase plan purchases during the three-month period ended September 30, 2019.

Income Taxes

3 Months Ended

Sep. 30, 2019

Income Tax Disclosure [Abstract]

Income Taxes

13. Income Taxes

Segment, Customers, and Geographic Information

3 Months Ended

Sep. 30, 2019

Segment Reporting [Abstract]

Segment, Customers, and Geographic Information

14. Segment, Customers, and Geographic Information

Net revenue within geographic areas based on our customers’ locations for the periods presented was as follows (in millions):

	Three Months Ended
	September 30,
	2019		2018
China	$	176.8	$	227.8
Taiwan		65.2		76.4
Japan		63.2		68.5
Other		16.5		15.4
South Korea		16.4		20.1
United States		1.8		9.4
	$	339.9	$	417.6

Net revenue from our customers for each group of similar products was as follows (in millions):

	Three Months Ended
	September 30,
	2019		2018
Mobile product applications	$	184.3	$	262.7
PC product applications		67.8		68.6
IoT product applications		87.8		86.3
	$	339.9	$	417.6

Net revenue from major customers as a percentage of total net revenue for the periods presented was as follows:

	Three Months Ended
	September 30,
	2019	2018
Customer A	12%	11%
Customer B	12%	*
Customer C	*	17%

*	Less than 10%

	September 30,	June 30,
	2019	2019
Customer A	19%	25%
Customer B	13%	*
Customer C	11%	16%

*	Less than 10%

Comprehensive Income

3 Months Ended

Sep. 30, 2019

Equity [Abstract]

Comprehensive Income

15. Comprehensive Income

Restructuring Activities

3 Months Ended

Sep. 30, 2019

Restructuring And Related Activities [Abstract]

Restructuring Activities

16. Restructuring Activities

The restructuring liability for the fiscal 2019 initiated activity during fiscal 2019 and the three months ended September 30, 2019 were as follows (in millions):

	Employee Severance
	and Benefits
Accruals	$	17.7
Cash payments		(12.5	)
Balance as of June 30, 2019		5.2
Accruals		6.6
Cash payments		(6.8	)
Balance as of September 30, 2019	$	5.0

Basis of Presentation (Policies)

3 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Use of Estimates

Foreign Currency Transactions and Foreign Exchange Contracts

Leases

Asset Acquisition

Impact of Recently Adopted Accounting Pronouncements

The adoption of this new standard at June 30, 2019, resulted in the following changes:

•

assets increased by $27.8 million, primarily representing the recognition of ROU assets for operating leases; and

•

liabilities increased by $28.4 million, primarily representing the recognition of lease liabilities for operating leases.

Net Income Per Share (Tables)

3 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Computation of Basic and Diluted Net Income Per Share

The computation of basic and diluted net income per share was as follows (in millions, except per share data):

	Three Months Ended
	September 30,
	2019		2018
Numerator:
Net income	$	4.0	$	3.8
Denominator:
Shares, basic		33.0		35.1
Effect of dilutive share-based awards		0.6		1.0
Shares, diluted		33.6		36.1
Net income per share:
Basic	$	0.12	$	0.11
Diluted	$	0.12	$	0.11

Inventories (Tables)

3 Months Ended

Sep. 30, 2019

Inventory Disclosure [Abstract]

Inventories

Inventories are stated at the lower of cost (first-in, first-out method) or net realizable value and consisted of the following (in millions):

	September 30,		June 30,
	2019		2019
Raw materials and work-in-progress	$	72.1	$	110.7
Finished goods		66.1		48.0
	$	138.2	$	158.7

Acquired Intangibles and Goodwill (Tables)

3 Months Ended

Sep. 30, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Summary of Life, Gross Carrying Value and Related Accumulated Amortization of Acquired Intangible Assets

The following table summarizes the life, the gross carrying value and the related accumulated amortization of our acquired intangible assets as of September 30, 2019 and June 30, 2019 (in millions):

			September 30, 2019							June 30, 2019
	Weighted Average Life in Years		Gross Carrying Value		Accumulated Amortization			Net Carrying Value		Gross Carrying Value		Accumulated Amortization			Net Carrying Value
Display driver technology		5.3	$	164.0	$	(155.9	)	$	8.1	$	164.0	$	(148.1	)	$	15.9
Audio and video technology		5.3		138.6		(56.1	)		82.5		138.6		(49.4	)		89.2
Customer relationships		4.1		81.8		(52.8	)		29.0		81.8		(49.9	)		31.9
Fingerprint authentication technology	Not applicable			—		—			—		47.2		(47.2	)		—
Licensed technology and other		4.2		7.7		(4.1	)		3.6		7.7		(3.6	)		4.1
Patents		8.1		4.4		(2.2	)		2.2		4.4		(2.0	)		2.4
Tradename		7.0		1.8		(0.6	)		1.2		1.8		(0.5	)		1.3
Acquired intangibles, gross		4.9	$	398.3	$	(271.7	)	$	126.6	$	445.5	$	(300.7	)	$	144.8

Schedule of Expected Annual Aggregate Amortization Expense

The following table presents expected annual fiscal year aggregate amortization expense as of September 30, 2019 (in millions):

Remainder of 2020	$	33.2
2021		37.5
2022		32.9
2023		20.4
2024		2.5
2025		0.1
Future amortization	$	126.6

Leases (Tables)

3 Months Ended

Sep. 30, 2019

Leases [Abstract]

Schedule of Components of Leases and Lease Costs

As of September 30, 2019, the components of leases and lease costs are as follows (in millions):

	September 30,
	2019
Operating lease right-of-use assets	$	25.8
Operating lease liabilities	$	8.4
Operating lease liabilities, long-term		17.8
Total operating lease liabilities	$	26.2

Schedule of Supplemental Cash Flow Information Related to Leases

Supplemental cash flow information related to leases is as follows (in millions):

	Three Months Ended
	September 30,
	2019
Cash paid for operating leases included in operating cash flows	$	2.3
Supplemental non-cash information related to lease liabilities arising from obtaining right-of-use assets		2.0

Schedule of Future Minimum Lease Payments for Operating Leases

As of September 30, 2019, the weighted average remaining lease term is 3.8 years, and the weighted average discount rate is 4.21%.

Future minimum lease payments for the operating lease liabilities are as follows (in millions):

	Operating
	Lease
Fiscal Year	Payments
Remainder of 2020	$	7.0
2021		8.5
2022		5.7
2023		3.4
2024		2.0
Thereafter		1.7
Total future minimum operating lease payments		28.3
Less: interest		(2.1	)
Total lease liabilities	$	26.2

Schedule of Aggregate Minimum Rental Commitments for Non-cancelable Operating Leases

	Operating
	Lease
Fiscal Year	Payments
2020	$	7.4
2021		3.2
2022		0.9
2023		0.3
2024		0.1
Total future minimum operating lease payments	$	11.9

Other Accrued Liabilities and Other Long-Term Liabilities (Tables)

3 Months Ended

Sep. 30, 2019

Payables And Accruals [Abstract]

Other Accrued Liabilities

Other accrued liabilities consisted of the following (in millions):

	September 30,		June 30,
	2019		2019
Customer Obligations	$	44.7	$	52.0
Inventory obligations		26.8		26.7
Operating lease liabilities		8.4		—
Warranty		4.0		4.0
Other		23.8		23.4
	$	107.7	$	106.1

Other Long-Term Liabilities

Other long-term liabilities consisted of the following (in millions):

	September 30,		June 30,
	2019		2019
Income taxes payable, long-term	$	16.4	$	16.2
Operating lease liabilities, long-term		17.8		—
Other		15.0		14.1
	$	49.2	$	30.3

Debt (Tables)

3 Months Ended

Sep. 30, 2019

Debt Disclosure [Abstract]

Schedule of Contractual Interest Expense and Amortization of Discount on Notes

The contractual interest expense and amortization of discount on the Notes for the three months ended September 30, 2019, were as follows (in millions):

	Three Months Ended
	September 30,
	2019
Interest expense	$	0.7
Amortization of discount and debt issuance costs		4.5
Total interest	$	5.2

Share-Based Compensation (Tables)

3 Months Ended

Sep. 30, 2019

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Share-Based Compensation and Related Tax Benefit Recognized in Condensed Consolidated Statements of Operations

Share-based compensation and the related tax benefit recognized in our condensed consolidated statements of income were as follows (in millions):

	Three Months Ended
	September 30,
	2019		2018
Cost of revenue	$	0.7	$	0.9
Research and development		7.5		8.3
Selling, general, and administrative		3.0		7.5
Total	$	11.2	$	16.7
Income tax benefit on share-based compensation	$	0.9	$	2.7

Schedule of Stock Option Activity

Stock option activity were as follows:

	Stock			Weighted		Aggregate
	Option			Average		Intrinsic
	Awards			Exercise		Value
	Outstanding			Price		(in millions)
Balance as of June 30, 2019		1,191,929		$	59.07
Granted		—			—
Exercised		(68,057	)		24.54
Forfeited		(75,300	)		65.02
Balance as of September 30, 2019		1,048,572			60.88	$	1.0
Exercisable at September 30, 2019		1,034,044			61.01	$	1.0

Deferred stock units outstanding [Member]

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Schedule of Stock Units Activity

DSU activity were as follows:

				Aggregate
	DSU			Intrinsic
	Awards			Value
	Outstanding			(in millions)
Balance as of June 30, 2019		1,878,853
Granted		200,417
Delivered		(183,256	)
Forfeited		(106,072	)
Balance as of September 30, 2019		1,789,942		$	70.9

Market stock units outstanding [Member]

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Schedule of Stock Units Activity

During the three months ended September 30, 2019, MSU activity and balances as of September 30, 2019 was as follows:

				Aggregate
	MSU			Intrinsic
	Awards			Value
	Outstanding			(in millions)
Balance as of June 30, 2019		210,732
Granted		185,982
Forfeited		(30,928	)
Balance as of September 30, 2019		365,786		$	14.5

Performance stock units outstanding [Member]

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Schedule of Stock Units Activity

During the three months ended September 30, 2019, PSU activity and balances as of September 30, 2019 were as follows:

				Aggregate
	PSU			Intrinsic
	Awards			Value
	Outstanding			(in millions)
Balance as of June 30, 2019		192,618
Forfeited		(29,095	)
Balance as of September 30, 2019		163,523		$	6.5

Segment, Customers, and Geographic Information (Tables)

3 Months Ended

Sep. 30, 2019

Segment Reporting Information [Line Items]

Net Revenue within Geographic Areas Based on Customers' Locations

Net revenue within geographic areas based on our customers’ locations for the periods presented was as follows (in millions):

	Three Months Ended
	September 30,
	2019		2018
China	$	176.8	$	227.8
Taiwan		65.2		76.4
Japan		63.2		68.5
Other		16.5		15.4
South Korea		16.4		20.1
United States		1.8		9.4
	$	339.9	$	417.6

Net Revenue from External Customers

Net revenue from our customers for each group of similar products was as follows (in millions):

	Three Months Ended
	September 30,
	2019		2018
Mobile product applications	$	184.3	$	262.7
PC product applications		67.8		68.6
IoT product applications		87.8		86.3
	$	339.9	$	417.6

Sales Revenue, Net [Member]

Segment Reporting Information [Line Items]

Major Customers as Percentage of Net Revenue

Net revenue from major customers as a percentage of total net revenue for the periods presented was as follows:

	Three Months Ended
	September 30,
	2019	2018
Customer A	12%	11%
Customer B	12%	*
Customer C	*	17%

*	Less than 10%

Accounts Receivable [Member]

Segment Reporting Information [Line Items]

Major Customers as Percentage of Net Revenue

Major customer accounts receivable as a percentage of total accounts receivable were as follows:

	September 30,	June 30,
	2019	2019
Customer A	19%	25%
Customer B	13%	*
Customer C	11%	16%

*	Less than 10%

Restructuring Activities (Tables)

3 Months Ended

Sep. 30, 2019

Restructuring And Related Activities [Abstract]

Restructuring Liability Activities

The restructuring liability for the fiscal 2019 initiated activity during fiscal 2019 and the three months ended September 30, 2019 were as follows (in millions):

	Employee Severance
	and Benefits
Accruals	$	17.7
Cash payments		(12.5	)
Balance as of June 30, 2019		5.2
Accruals		6.6
Cash payments		(6.8	)
Balance as of September 30, 2019	$	5.0

Basis of Presentation - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Accounting Policies [Abstract]
Net gain (loss) on foreign currency transactions	$ 0.4	$ (0.4)
Purchase price included in cash	2.5
Purchase price in contingent consideration	6.5
Assets acquired accrued Contingent Consideration	1.3
Research and development expenses	3.7
Liabilities recorded in acquisition	$ 1.5
Period for amount payable upon meeting milestones	December 2021 through December 2023
Long-term deferred tax asset	$ 0.3

Impact of Recently Adopted Accounting Pronouncements - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
Operating lease right-of-use assets	$ 25.8	$ 27.8
Operating lease, liability	$ 26.2	$ 28.4

Revenue Recognition - Additional Information (Detail) - USD ($)	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Contract asset	$ 1,000,000.0		$ 900,000
Contract liability	6,400,000		4,500,000
Refund liability	38,300,000		$ 47,500,000
Revenue recognized related to contract liabilities	$ 200,000	$ 400,000
Description of payment terms in contract with customer	Payments are generally due within three months upon completion of the performance obligation and subsequent invoicing and therefore, do not include significant financing components.
Accounting Standards Update 2014-09 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Remaining unsatisfied performance obligation	$ 0
Maximum [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, performance obligation, payment terms	3 months

Net Income Per Share - Computation of Basic and Diluted Net Income Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Numerator:
Net income	$ 4.0	$ 3.8
Denominator:
Shares, basic	33.0	35.1
Effect of dilutive share-based awards	0.6	1.0
Shares, diluted	33.6	36.1
Net income per share:
Basic	$ 0.12	$ 0.11
Diluted	$ 0.12	$ 0.11

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Net Income Per Share - Additional Information (Detail) - shares	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Share-Based Awards [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common shares that were not included in computation of diluted net income per share	1,340,521	1,357,565

Fair Value - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019
Level 1 [Member] \| Money Market Funds [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale securities, debt securities	$ 331.0	$ 313.7

Inventories - Inventories (Detail) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019
Inventory Disclosure [Abstract]
Raw materials and work-in-progress	$ 72.1	$ 110.7
Finished goods	66.1	48.0
Total Inventories	$ 138.2	$ 158.7

Acquired Intangibles and Goodwill - Summary of Life, Gross Carrying Value and Related Accumulated Amortization of Acquired Intangible Assets (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Jun. 30, 2019
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value	$ 398.3	$ 445.5
Acquired intangibles, Accumulated Amortization	(271.7)	(300.7)
Acquired intangibles, Net Carrying Value	$ 126.6	144.8
Weighted Average Life in Years	4 years 10 months 24 days
Display Driver Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value	$ 164.0	164.0
Acquired intangibles, Accumulated Amortization	(155.9)	(148.1)
Acquired intangibles, Net Carrying Value	$ 8.1	15.9
Weighted Average Life in Years	5 years 3 months 18 days
Audio and Video Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value	$ 138.6	138.6
Acquired intangibles, Accumulated Amortization	(56.1)	(49.4)
Acquired intangibles, Net Carrying Value	$ 82.5	89.2
Weighted Average Life in Years	5 years 3 months 18 days
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value	$ 81.8	81.8
Acquired intangibles, Accumulated Amortization	(52.8)	(49.9)
Acquired intangibles, Net Carrying Value	$ 29.0	31.9
Weighted Average Life in Years	4 years 1 month 6 days
Fingerprint Authentication Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value		47.2
Acquired intangibles, Accumulated Amortization		(47.2)
Licensed Technology and Other [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value	$ 7.7	7.7
Acquired intangibles, Accumulated Amortization	(4.1)	(3.6)
Acquired intangibles, Net Carrying Value	$ 3.6	4.1
Weighted Average Life in Years	4 years 2 months 12 days
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value	$ 4.4	4.4
Acquired intangibles, Accumulated Amortization	(2.2)	(2.0)
Acquired intangibles, Net Carrying Value	$ 2.2	2.4
Weighted Average Life in Years	8 years 1 month 6 days
Tradename [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value	$ 1.8	1.8
Acquired intangibles, Accumulated Amortization	(0.6)	(0.5)
Acquired intangibles, Net Carrying Value	$ 1.2	$ 1.3
Weighted Average Life in Years	7 years

Acquired Intangibles and Goodwill - Additional Information (Detail) - USD ($)	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles amortization	$ 18,200,000	$ 20,000,000.0
Changes in goodwill	0
Cost of Revenue [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles amortization	$ 15,300,000	$ 17,000,000.0

Acquired Intangibles and Goodwill - Schedule of Expected Annual Aggregate Amortization Expense (Detail) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Remainder of 2020	$ 33.2
2021	37.5
2022	32.9
2023	20.4
2024	2.5
2025	0.1
Acquired intangibles, Net Carrying Value	$ 126.6	$ 144.8

Leases - Additional Information (Detail) $ in Millions	3 Months Ended
Leases - Additional Information (Detail) $ in Millions	Sep. 30, 2019 USD ($)
Lessee Lease Description [Line Items]
Lease Option to Extend	The leases expire at various dates through fiscal year 2026, some of which include options to extend the lease for up to 5 years.
Lease Expiration Year.	2026
Lessee, Operating Lease, Existence of Option to Extend	true
Operating Lease, Expense	$ 2.3
Operating Lease, Weighted Average Remaining Lease Term	3 years 9 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	4.21%
Maximum [Member]
Lessee Lease Description [Line Items]
Duration of Extending leases	5 years

Leases - Schedule of Components of Leases and Lease Costs (Details) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019
Leases [Abstract]
Operating lease right-of-use assets	$ 25.8	$ 27.8
Operating lease liabilities	8.4
Operating lease liabilities, long-term	17.8
Total operating lease liabilities	$ 26.2

Leases - Schedule of Supplemental Cash Flow Information Related to Leases (Details) $ in Millions	3 Months Ended
	Sep. 30, 2019 USD ($)
Leases [Abstract]
Cash paid for operating leases included in operating cash flows	$ 2.3
Supplemental non-cash information related to lease liabilities arising from obtaining right-of-use assets	$ 2.0

Leases - Schedule of Future Minimum Lease Payments for Operating Leases (Details) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019
Leases [Abstract]
Remainder of 2020	$ 7.0
2021	8.5
2022	5.7
2023	3.4
2024	2.0
Thereafter	1.7
Total	28.3
Less: interest	(2.1)
Total lease liabilities	26.2	$ 28.4
Total	$ 11.9

Leases - Aggregate Minimum Rental Commitments for Non-cancelable Operating Leases (Details) $ in Millions	Sep. 30, 2019 USD ($)
Leases [Abstract]
2020	$ 7.4
2021	3.2
2022	0.9
2023	0.3
2024	0.1
Total	$ 11.9

Other Accrued Liabilities and Other Long-Term Liabilities - Other Accrued Liabilities (Detail) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019
Payables And Accruals [Abstract]
Customer Obligations	$ 44.7	$ 52.0
Inventory obligations	26.8	26.7
Operating lease liabilities	8.4
Warranty	4.0	4.0
Other	23.8	23.4
Other accrued liabilities	$ 107.7	$ 106.1

Other Accrued Liabilities and Other Long-Term Liabilities - Other Long-Term Liabilities (Detail) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019
Payables And Accruals [Abstract]
Income taxes payable, long-term	$ 16.4	$ 16.2
Operating lease liabilities, long-term	17.8
Other	15.0	14.1
Other long-term liabilities	$ 49.2	$ 30.3

Debt - Additional Information (Detail)	3 Months Ended
Debt - Additional Information (Detail)	Sep. 30, 2019 USD ($) Day $ / shares shares	Sep. 30, 2017 USD ($)
Debt Instrument [Line Items]
Percentage of voting capital stock	65.00%
0.50% Convertible Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Debt instrument aggregate principal amounts	$ 525,000,000
Net proceeds from issuance of convertible debt	$ 514,500,000
Interest rates on borrowings	0.50%
Debt instrument maturity date	Jun. 15, 2022
Conversion of notes in multiples of principal amounts	$ 1,000
Convertible number of shares, principal amount of notes \| shares	13.6947
Initial conversion price per share of common stock \| $ / shares	$ 73.02
Note repurchase price, percentage of principal amount of notes	100.00%
Sale price of common stock, minimum threshold percentage	130.00%
Sale of common stock, threshold trading days \| Day	20
Sale of common stock, threshold consecutive trading days \| Day	30
Equity component of the principal amount of the convertible debt	$ 82,100,000
Nonconvertible debt borrowing rate	4.39%
Debt instrument term	5 years
Debt issuance costs	$ 11,100,000
Initial purchaser's discount	10,500,000
Legal, accounting, and printing costs	579,000
Convertible debt issuance costs pro rata to equity components	1,900,000
Convertible debt issuance costs pro rata to debt components	$ 9,200,000
Debt amortization period	5 years
Unamortized amounts of debt issuance costs	$ 5,200,000
Unamortized amounts of debt discount	$ 47,000,000.0
Amendment and Restatement Agreement [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt amortization period	60 months
Line of credit facility amount		$ 200,000,000
Line of credit facility allowable requests for additional borrowing		100,000,000
Outstanding principal amount	$ 0
Maturity period	Sep. 27, 2022
Repayment date, description	The revolving credit facility is required to be repaid in full on the earlier of (i) September 27, 2022, and (ii) the date 91 days prior to the Maturity Date of the Notes if the Notes have not been refinanced in full by such date.
Debt issuance cost	$ 2,300,000
Description of base rate	The revolving credit facility bears interest at our election of a Base Rate plus an Applicable Margin or LIBOR plus an Applicable Margin. Swingline loans bear interest at a Base Rate plus an Applicable Margin. The Base Rate is a floating rate that is the greater of the Prime Rate, the Federal Funds Rate plus 50 basis points, or LIBOR plus 100 basis points. The Applicable Margin is based on a sliding scale which ranges from 0.25 to 100 basis points for Base Rate loans and 100 basis points to 175 basis points for LIBOR loans.
Covenant description	Under the Agreement, there are various restrictive covenants, including three financial covenants which limit the consolidated total leverage ratio, or leverage ratio, the consolidated interest coverage ratio, or interest coverage ratio, a restriction which places a limit on the amount of capital expenditures that may be made in any fiscal year, a restriction that permits up to $50 million per fiscal quarter of accounts receivable financings, and sets the Specified Leverage Ratio. The leverage ratio is the ratio of debt as of the measurement date to earnings before interest, taxes, depreciation and amortization, or EBITDA, for the four consecutive quarters ending with the quarter of measurement. The current leverage ratio shall not exceed 3.50 to 1.00 provided that for the four fiscal quarters ending after the date of a material acquisition, such maximum leverage ratio shall be adjusted to 3.75 to 1.00, and thereafter, shall not be more than 3.50 to 1.00. The interest coverage ratio is EBITDA to interest expense for the four consecutive quarters ending with the quarter of measurement. The interest coverage ratio must not be less than 3.50 to 1.0 during the term of the Agreement. The Specified Leverage Ratio is the ratio used in determining, among other things, whether we are permitted to make dividends and/or prepay certain indebtedness, at a fixed ratio of 3.00 to 1.00. As of the end of the fiscal quarter, we were in compliance with the restrictive covenants
Maximum accounts receivable financings per quarter	$ 50,000,000
Maximum leverage ratio permitted	3.50%
Minimum interest coverage ratio	3.50%
Fixed coverage ratio	3.00%
Amendment and Restatement Agreement [Member] \| Revolving Credit Facility [Member] \| For The First Four Fiscal Quarters Ending After Date of Material Acquisition [Member]
Debt Instrument [Line Items]
Maximum leverage ratio permitted	3.75%
Amendment and Restatement Agreement [Member] \| Revolving Credit Facility [Member] \| Thereafter [Member]
Debt Instrument [Line Items]
Maximum leverage ratio permitted	3.50%
Amendment and Restatement Agreement [Member] \| Revolving Credit Facility [Member] \| Federal Funds Rates [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
Amendment and Restatement Agreement [Member] \| Revolving Credit Facility [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
Amendment and Restatement Agreement [Member] \| Revolving Credit Facility [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Commitment fee percentage of unused portion	0.175%
Amendment and Restatement Agreement [Member] \| Revolving Credit Facility [Member] \| Minimum [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
Amendment and Restatement Agreement [Member] \| Revolving Credit Facility [Member] \| Minimum [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.0025%
Amendment and Restatement Agreement [Member] \| Revolving Credit Facility [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Commitment fee percentage of unused portion	0.25%
Amendment and Restatement Agreement [Member] \| Revolving Credit Facility [Member] \| Maximum [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.75%
Amendment and Restatement Agreement [Member] \| Revolving Credit Facility [Member] \| Maximum [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
Amendment and Restatement Agreement [Member] \| Letter of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility amount		20,000,000
Amendment and Restatement Agreement [Member] \| Bridge Loan [Member]
Debt Instrument [Line Items]
Line of credit facility amount		$ 20,000,000

Debt - Schedule of Contractual Interest Expense and Amortization of Discount on Notes (Detail) - 0.50% Convertible Senior Notes due 2022 [Member] $ in Millions	3 Months Ended
	Sep. 30, 2019 USD ($)
Debt Instrument [Line Items]
Interest expense	$ 0.7
Amortization of discount and debt issuance costs	4.5
Total interest	$ 5.2

Share-Based Compensation - Share-Based Compensation and Related Tax Benefit Recognized in Condensed Consolidated Statements of Operations (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total	$ 11.2	$ 16.7
Income tax benefit on share-based compensation	0.9	2.7
Cost of Revenue [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total	0.7	0.9
Research and Development [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total	7.5	8.3
Selling, General, and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total	$ 3.0	$ 7.5

Share-Based Compensation - Schedule of Stock Option Activity (Detail) $ / shares in Units, $ in Millions	3 Months Ended
	Sep. 30, 2019 USD ($) $ / shares shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock Option Awards Outstanding, Balance as of June 30, 2019 \| shares	1,191,929
Stock Option Awards Outstanding, Exercised \| shares	(68,057)
Stock Option Awards Outstanding, Forfeited \| shares	(75,300)
Stock Option Awards Outstanding, Balance as of September 30, 2019 \| shares	1,048,572
Stock Option Awards Outstanding, Exercisable at September 30, 2019 \| shares	1,034,044
Weighted Average Exercise Price, Balance as of June 30, 2019 \| $ / shares	$ 59.07
Weighted Average Exercise Price, Exercised \| $ / shares	24.54
Weighted Average Exercise Price, Forfeited \| $ / shares	65.02
Weighted Average Exercise Price, Balance as of September 30, 2019 \| $ / shares	60.88
Weighted Average Exercise Price, Exercisable at September 30, 2019 \| $ / shares	$ 61.01
Aggregate Intrinsic Value, Balance as of September 30, 2019 \| $	$ 1.0
Aggregate Intrinsic Value, Exercisable at September 30, 2019 \| $	$ 1.0

Share-Based Compensation - Stock Options - Additional Information (Detail)	Sep. 27, 2019 $ / shares
Stock option outstanding [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Closing price of common stock used to calculate Aggregate intrinsic value of stock option outstanding	$ 39.62

Share-Based Compensation - Schedule of Stock Units Activity (Detail) $ in Millions	3 Months Ended
	Sep. 30, 2019 USD ($) shares
Deferred stock units outstanding [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock Unit Awards Outstanding, Balance as of June 30, 2019	1,878,853
Stock Unit Awards, Granted	200,417
Stock Unit Awards, Delivered	(183,256)
Stock Unit Awards, Forfeited	(106,072)
Stock Unit Awards Outstanding, Balance as of September 30, 2019	1,789,942
Aggregate Intrinsic Value, Balance as of September 30, 2019 \| $	$ 70.9
Market stock units outstanding [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock Unit Awards Outstanding, Balance as of June 30, 2019	210,732
Stock Unit Awards, Granted	185,982
Stock Unit Awards, Forfeited	(30,928)
Stock Unit Awards Outstanding, Balance as of September 30, 2019	365,786
Aggregate Intrinsic Value, Balance as of September 30, 2019 \| $	$ 14.5
Performance stock units outstanding [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock Unit Awards Outstanding, Balance as of June 30, 2019	192,618
Stock Unit Awards, Forfeited	(29,095)
Stock Unit Awards Outstanding, Balance as of September 30, 2019	163,523
Aggregate Intrinsic Value, Balance as of September 30, 2019 \| $	$ 6.5

Share-Based Compensation - Deferred Stock Units - Additional Information (Detail) - Deferred stock units outstanding [Member] - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 27, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Closing price of common stock used to calculate Aggregate intrinsic value of stock option outstanding		$ 39.62
Shares withheld to meet statutory minimum tax withholding requirements	42,740
Shares valued withheld to meet statutory minimum tax withholding requirements	$ 1.5

Share-Based Compensation - Market Stock Units - Additional Information (Detail) - Market stock units outstanding [Member] - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 27, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout adjustment ratio	200.00%
Closing price of common stock used to calculate Aggregate intrinsic value of stock option outstanding		$ 39.62
Unrecognized share-based compensation cost	$ 14.5
Unrecognized share-based compensation, period for recognition	1 year 7 months 6 days
Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout range	0.00%
Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout range	200.00%
Share-based Compensation Award, First Tranche [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period of the underlying awards	1 year
Vesting percentage of the underlying awards	33.33%
Share-based Compensation Award, First Tranche [Member] \| Maximum [Member] \| Three Year Performance
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout range	100.00%
Share-based Compensation Award, First Tranche [Member] \| Maximum [Member] \| Four Year Performance
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout range	100.00%
Share-based Compensation Award, Second Tranche [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period of the underlying awards	2 years
Vesting percentage of the underlying awards	33.33%
Share-based Compensation Award, Second Tranche [Member] \| Maximum [Member] \| Three Year Performance
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout range	100.00%
Share-based Compensation Award, Second Tranche [Member] \| Maximum [Member] \| Four Year Performance
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout range	100.00%
Share-based Compensation Award, Third Tranche [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period of the underlying awards	3 years
Vesting percentage of the underlying awards	33.33%
Share-based Compensation Award, Third Tranche [Member] \| Maximum [Member] \| Four Year Performance
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout range	100.00%
Share-based Compensation Award, Fourth Tranche [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period of the underlying awards	4 years
Vesting percentage of the underlying awards	25.00%

Share-Based Compensation - Performance Stock Units - Additional Information (Detail) - Performance stock units outstanding [Member] - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 27, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period of the underlying awards	3 years
Vesting percentage of the underlying awards	33.33%
Closing price of common stock used to calculate Aggregate intrinsic value of stock option outstanding		$ 39.62
Requisite service period	3 years
Unrecognized share-based compensation cost	$ 1.3
Unrecognized share-based compensation, period for recognition	9 months 18 days
Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout range	0.00%
Threshold percentage of earnings per share to trigger pay out	65.00%
Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout range	200.00%
Threshold percentage of earnings per share to trigger pay out	135.00%

Share-Based Compensation - Employee Stock Purchase Plan - Additional Information (Detail)	3 Months Ended
	Sep. 30, 2019 shares
Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares purchased	0

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019
Income Tax Disclosure [Line Items]
Provision/(benefit) for income taxes	$ (4.9)	$ (0.3)
Gross unrecognized tax benefits	20.1		$ 18.9
Gross unrecognized tax benefits increased (decreased) during the year	1.2
Interest and penalties accrued related to unrecognized tax benefits	1.7
Increase (decrease) in interest and penalties accrued related to unrecognized tax benefits			$ (0.2)
Maximum [Member]
Income Tax Disclosure [Line Items]
Estimated increase in unrecognized tax benefit in next twelve months	$ 2.5

Segment, Customers, and Geographic Information - Additional Information (Detail)	3 Months Ended
	Sep. 30, 2019 Segment Product
Segment Reporting [Abstract]
Number of operating segments \| Segment	1
Number of product \| Product	3

Segment, Customers, and Geographic Information - Net Revenue within Geographic Areas Based on Customers' Locations (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	$ 339.9	$ 417.6
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	176.8	227.8
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	63.2	68.5
Taiwan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	65.2	76.4
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	16.5	15.4
South Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	16.4	20.1
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	$ 1.8	$ 9.4

Segment, Customers, and Geographic Information - Net Revenue from External Customers (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Revenue from External Customer [Line Items]
Net revenue	$ 339.9	$ 417.6
Mobile Product Applications [Member]
Revenue from External Customer [Line Items]
Net revenue	184.3	262.7
PC Product Applications [Member]
Revenue from External Customer [Line Items]
Net revenue	67.8	68.6
Internet of Things Product Applications [Member]
Revenue from External Customer [Line Items]
Net revenue	$ 87.8	$ 86.3

Segment, Customers, and Geographic Information - Major Customers as Percentage of Net Revenue (Detail) - Sales Revenue, Net [Member] - Customer Concentration Risk [Member]	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Customer A [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	12.00%	11.00%
Customer B [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	12.00%
Customer C [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage		17.00%

Segment, Customers, and Geographic Information - Major Customers as Percentage of Net Revenue (Parenthetical) (Detail)	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Customer Concentration Risk [Member] \| Sales Revenue, Net [Member] \| Maximum [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	10.00%	10.00%

Segment, Customers, and Geographic Information - Major Customer Accounts Receivable as Percentage of Accounts Receivable (Detail) - Accounts Receivable [Member] - Credit Concentration Risk [Member]	3 Months Ended	12 Months Ended
	Sep. 30, 2019	Jun. 30, 2019
Customer A [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	19.00%	25.00%
Customer B [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	13.00%
Customer C [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	11.00%	16.00%

Segment, Customers, and Geographic Information - Major Customer Accounts Receivable as Percentage of Accounts Receivable (Parenthetical) (Detail)	3 Months Ended	12 Months Ended
	Sep. 30, 2019	Jun. 30, 2019
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Maximum [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	10.00%	10.00%

Restructuring Activities - Restructuring Liability Activities (Detail) - 2019 Restructuring Plan [Member] - Employee Severance and Benefits [Member] - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2019	Jun. 30, 2019
Restructuring Cost And Reserve [Line Items]
Beginning Balance	$ 5.2
Additional accruals	6.6	$ 17.7
Cash payments	(6.8)	(12.5)
Ending Balance	$ 5.0	$ 5.2