Xilinx (XLNX) 10-Q 25 Oct 19 2020 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Sep. 28, 2019	Oct. 11, 2019
Cover page.
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 28, 2019
Document Transition Report	false
Entity File Number	000-18548
Entity Registrant Name	XILINX, INC
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	2100 Logic Drive
Entity Address, City or Town	San Jose
Entity Address, State or Province	CA
Entity Tax Identification Number	77-0188631
Entity Address, Postal Zip Code	95124
City Area Code	408
Local Phone Number	559-7778
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	XLNX
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		251,467,392
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Entity Central Index Key	0000743988
Current Fiscal Year End Date	--03-28

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Revenues	$ 833,366	$ 746,252	$ 1,682,998	$ 1,430,622
Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization	287,372	231,620	570,872	438,508
Cost of revenues	293,106	231,620	579,875	438,508
Cost, Depreciation and Amortization	5,734	0	9,003	0
Gross margin	540,260	514,632	1,103,123	992,114
Operating expenses:
Research and development	222,979	183,372	427,079	354,198
Selling, general and administrative	111,596	97,685	219,021	188,217
Amortization of acquisition-related intangibles	2,169	839	2,569	1,199
Total operating expenses	336,744	281,896	648,669	543,614
Operating income	203,516	232,736	454,454	448,500
Interest and other income, net	12,329	6,408	23,941	3,561
Income before income taxes	215,845	239,144	478,395	452,061
Provision (benefit) for income taxes	(11,148)	23,432	9,943	46,311
Net income	$ 226,993	$ 215,712	$ 468,452	$ 405,750
Net income per common share:
Basic (in dollars per share)	$ 0.90	$ 0.85	$ 1.85	$ 1.61
Diluted (in dollars per share)	0.89	0.84	1.83	1.59
Common Stock, Dividends, Per Share, Declared	$ 0.37	$ 0.36	$ 0.74	$ 0.72
Shares used in per share calculations:
Basic (in shares)	252,399	252,988	252,728	252,541
Diluted (in shares)	255,269	255,522	256,509	255,057

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 226,993	$ 215,712	$ 468,452	$ 405,750
Other comprehensive income (loss), net of tax:
Change in net unrealized gains (losses) on available-for-sale securities	1,961	(2,125)	11,716	(3,785)
Reclassification adjustment for (gains) losses on available-for-sale securities	(366)	1	(799)	(50)
Change in unrealized gains (losses) on hedging transactions	(4,442)	1,190	(4,013)	(4,430)
Reclassification adjustment for (gains) losses on hedging transactions	1,329	(1,730)	2,151	(2,171)
Cumulative translation adjustment, net	(2,146)	(2,143)	(2,781)	(4,192)
Other comprehensive income (loss)	(3,664)	(4,807)	6,274	(14,628)
Total comprehensive income	$ 223,329	$ 210,905	$ 474,726	$ 391,122

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 28, 2019	Mar. 30, 2019
Current assets:
Cash and cash equivalents at beginning of period	$ 1,603,813	$ 1,544,490
Short-term investments	912,030	1,631,194
Accounts receivable, net	335,499	335,165
Inventories	335,258	315,358
Prepaid expenses and other current assets	71,400	65,771
Total current assets	3,258,000	3,891,978
Property, plant and equipment, at cost:	960,101	902,993
Accumulated depreciation and amortization	(597,941)	(574,064)
Net property, plant and equipment	362,160	328,929
Long-term investments	0	53,433
Goodwill	620,852	340,718
Acquisition-related intangibles, net	220,057	80,723
Other assets	558,829	455,567
Total Assets	5,019,898	5,151,348
Current liabilities:
Accounts payable	107,105	117,491
Accrued payroll and related liabilities	246,310	247,268
Income taxes payable	17,176	28,718
Other accrued liabilities	135,237	81,559
Total current liabilities	505,828	475,036
Long-term Debt, Excluding Current Maturities	1,245,631	1,234,807
Long-term income taxes payable	476,641	515,192
Other long-term liabilities	95,893	64,804
Commitments and contingencies (Note 17)
Stockholders' equity:
Preferred stock, $.01 par value (none issued and outstanding)	0	0
Common stock, $.01 par value	2,515	2,539
Additional paid-in capital	978,222	1,005,411
Retained earnings	1,732,304	1,876,969
Accumulated other comprehensive loss	(17,136)	(23,410)
Total stockholders’ equity	2,695,905	2,861,509
Total Liabilities and Stockholders’ Equity	$ 5,019,898	$ 5,151,348

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 28, 2019	Mar. 30, 2019
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares issued (none issued)	0	0
Common stock, par value	$ 0.01	$ 0.01

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income	$ 468,452	$ 405,750
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of software	42,551	31,123
Amortization - others	22,050	15,477
Stock-based compensation	92,575	70,553
Benefit for deferred income taxes	11,342	4,825
Others	(19,580)	2,475
Changes in assets and liabilities:
Accounts receivable, net	5,523	9,263
Inventories	(14,675)	(6,887)
Prepaid expenses and other current assets	(1,860)	(5,744)
Other assets	(12,539)	(17,616)
Accounts payable	(19,786)	4,525
Accrued liabilities	21	13,116
Income taxes payable	(52,164)	(37,569)
Net cash provided by operating activities	521,910	489,291
Cash flows from investing activities:
Purchases of available-for-sale securities	(671,515)	(819,512)
Proceeds from sale and maturity of available-for-sale and equity securities	1,458,286	780,567
Purchases of property, plant and equipment and software	(62,842)	(40,533)
Other investing activities	(5,453)	(25,277)
Payments to Acquire Businesses, Net of Cash Acquired	(454,613)	(223,535)
Net cash provided by (used in) investing activities	263,863	(328,290)
Cash flows from financing activities:
Payments for Repurchase of Common Stock	(477,245)	(160,536)
Payment, Tax Withholding, Share-based Payment Arrangement	(71,778)	(39,494)
Proceeds from issuance of common stock through various stock plans	19,802	18,416
Payment of dividends to stockholders	(187,445)	(181,752)
Other financing activities	(9,784)	(2,325)
Net cash used in financing activities	(726,450)	(365,691)
Net increase (decrease) in cash and cash equivalents	59,323	(204,690)
Cash and cash equivalents at beginning of period	1,544,490	2,179,328
Cash and cash equivalents at end of period	1,603,813	$ 1,974,638
Supplemental disclosure of cash flow information:
Interest paid	30,513		$ 33,986
Income taxes paid, net	$ 50,332		$ 78,948

Condensed Consolidated Statemen

Condensed Consolidated Statements of Stockholders' Equity Statement - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]
Common Stock Outstanding, beginning balance (in shares) at Mar. 31, 2018		253,377
Beginning balance at Mar. 31, 2018	$ 2,360,353	$ 2,534	$ 878,672	$ 1,513,656	$ (34,509)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	405,750			405,750
Other comprehensive loss	(14,628)				(14,628)
Tax withholding related to vesting of restricted stock units and other (in shares)		2,064
Tax withholding related to vesting of restricted stock units and other	(21,078)	$ 21	(21,099)
Repurchase and retirement of common stock (in shares)		(2,422)
Repurchase and retirement of common stock, including settlement of stock repurchase agreement	(160,536)	$ (25)	(21,508)	$ (139,003)
Stock-based compensation expense	$ 70,553		70,553
Cash dividends declared	$ (0.72)			$ 0.72
Common Stock Outstanding, ending balance (in shares) at Sep. 29, 2018		253,019
Ending balance at Sep. 29, 2018	$ 2,444,886	$ 2,530	906,618	$ 1,576,476	(40,738)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends, Common Stock, Cash	181,752			181,752
Common Stock Outstanding, beginning balance (in shares) at Jun. 30, 2018		251,450
Beginning balance at Jun. 30, 2018	2,318,639	$ 2,515	894,588	1,457,467	(35,931)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	215,712			215,712
Other comprehensive loss	(4,807)				(4,807)
Tax withholding related to vesting of restricted stock units and other (in shares)		1,921
Tax withholding related to vesting of restricted stock units and other	(15,797)	$ 19	(15,816)
Repurchase and retirement of common stock (in shares)		(352)
Repurchase and retirement of common stock, including settlement of stock repurchase agreement	(12,729)	$ (4)	(7,099)	$ (5,626)
Stock-based compensation expense	$ 34,945		34,945
Cash dividends declared	$ (0.36)			$ 0.36
Common Stock Outstanding, ending balance (in shares) at Sep. 29, 2018		253,019
Ending balance at Sep. 29, 2018	$ 2,444,886	$ 2,530	906,618	$ 1,576,476	(40,738)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends, Common Stock, Cash	91,077			91,077
Common Stock Outstanding, beginning balance (in shares) at Mar. 30, 2019		253,891
Beginning balance at Mar. 30, 2019	2,861,509	$ 2,539	1,005,411	1,876,969	(23,410)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	468,452			468,452
Other comprehensive loss	6,274				6,274
Tax withholding related to vesting of restricted stock units and other (in shares)		2,018
Tax withholding related to vesting of restricted stock units and other	(51,976)	$ 20	(51,996)
Repurchase and retirement of common stock (in shares)		(4,443)
Repurchase and retirement of common stock, including settlement of stock repurchase agreement	(493,484)	$ (44)	(67,768)	$ (425,672)
Stock-based compensation expense	$ 92,575		92,575
Cash dividends declared	$ (0.74)			$ 0.74
Common Stock Outstanding, ending balance (in shares) at Sep. 28, 2019		251,466
Ending balance at Sep. 28, 2019	$ 2,695,905	$ 2,515	978,222	$ 1,732,304	(17,136)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends, Common Stock, Cash	187,445			187,445
Common Stock Outstanding, beginning balance (in shares) at Jun. 29, 2019		251,020
Beginning balance at Jun. 29, 2019	2,612,584	$ 2,510	880,305	1,743,241	(13,472)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	226,993			226,993
Other comprehensive loss	(3,664)				(3,664)
Tax withholding related to vesting of restricted stock units and other (in shares)		1,921
Tax withholding related to vesting of restricted stock units and other	(47,856)	$ 20	(47,876)
Repurchase and retirement of common stock (in shares)		(1,475)
Repurchase and retirement of common stock, including settlement of stock repurchase agreement	(48,490)	$ (15)	95,971	$ (144,446)
Stock-based compensation expense	$ 49,822		49,822
Cash dividends declared	$ (0.37)			$ 0.37
Common Stock Outstanding, ending balance (in shares) at Sep. 28, 2019		251,466
Ending balance at Sep. 28, 2019	$ 2,695,905	$ 2,515	$ 978,222	$ 1,732,304	$ (17,136)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends, Common Stock, Cash	$ 93,484			$ 93,484

Basis of Presentation

Basis of Presentation	6 Months Ended
	Sep. 28, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	Basis of Presentation The accompanying interim condensed consolidated financial statements have been prepared in conformity with United States (U.S.) generally accepted accounting principles (GAAP) for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X, and should be read in conjunction with the Xilinx, Inc. (Xilinx or the Company) consolidated financial statements filed with the U.S. Securities and Exchange Commission (SEC) on Form 10-K for the fiscal year ended March 30, 2019 . The interim financial statements are unaudited, but reflect all adjustments which are, in the opinion of management, of a normal, recurring nature necessary to provide a fair statement of results for the interim periods presented. The results of operations for the interim periods shown in this report are not necessarily indicative of the results that may be expected for the fiscal year ending March 28, 2020 or any future period. The Company uses a 52- to 53-week fiscal year ending on the Saturday nearest March 31. Fiscal 2020 and fiscal 2019 are both 52-week years ending on March 28, 2020 and March 30, 2019 , respectively. The quarters ended September 28, 2019 and September 29, 2018 each consisted of 13 weeks.

Recent Accounting Changes and A

Recent Accounting Changes and Accounting Pronouncements	6 Months Ended
	Sep. 28, 2019
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Changes and Accounting Pronouncements	Recent Accounting Changes and Accounting Pronouncements Recent Accounting Pronouncements Adopted Leases In February 2016, the Financial Accounting Standards Board (FASB) issued authoritative guidance on leases. The new authoritative guidance requires the recognition of assets and liabilities arising from lease transactions on the balance sheet and additional disclosures about the amount, timing and uncertainty of cash flows from leases. Accordingly, a lessee recognizes a lease asset for its right to use the underlying asset and a lease liability for the corresponding lease obligation. The Company adopted this authoritative guidance using modified retrospective method during first quarter of fiscal 2020 and resulted in the recognition of right-of-use assets of approximately $50.0 million and lease liabilities for operating leases of approximately $50.0 million on March 31, 2019, the beginning of fiscal 2020. The Company determines if an arrangement is a lease, or contains a lease, at the inception of the arrangement. On the commencement date, leases are evaluated for classification, and assets and liabilities are recognized based on the present value of lease payments over the lease term. The Company uses the incremental borrowing rate based on the information available at commencement in determining the present value of lease payments. Operating lease expense is generally recognized on a straight-line basis over the lease term. The Company has elected the practical expedients to not separate lease and non-lease components within lease transactions, and not to record on the balance sheet leases with a term of 12 months or less. The Company also has elected the package of practical expedients, which allows the Company not to reassess (1) whether any expired or existing contracts as of the adoption date are or contain a lease, (2) lease classification for any expired or existing leases as of the adoption date and (3) initial direct costs for any existing leases as of the adoption date. The Company did not elect to apply the hindsight practical expedient when determining lease term and assessing impairment of right-of-use assets.

Significant Customers and Conce

Significant Customers and Concentrations of Credit Risk (Notes)	6 Months Ended
	Sep. 28, 2019
Significant Customers and Concentrations of Credit Risk [Abstract]
Concentration Risk Disclosure [Text Block]	Significant Customers and Concentrations of Credit Risk Avnet, Inc. (Avnet), one of the Company’s distributors, distributes the Company’s products worldwide. As of September 28, 2019 and March 30, 2019 , Avnet accounted for 35% and 37% of the Company’s total net accounts receivable, respectively. Net revenues from Avnet accounted for 40% and 40% of the Company’s worldwide net revenues in the second quarter and first six months of fiscal 2020 , respectively. Net revenues from Avnet accounted for 46% and 49% of the Company’s worldwide net revenues in the second quarter and the first six months of fiscal 2019 , respectively. While the percentage of worldwide net revenues from Avnet fluctuates from period to period, overall the percentage is within historical ranges. For the second quarter and the first six months of fiscal 2020 , approximately 49% and 49% , respectively, of the Company's net revenues were from products sold to distributors for subsequent resale to original equipment manufacturers (OEMs) or their subcontract manufacturers. For the second quarter and the first six months of fiscal 2019 the percentages of the Company's net revenues from distributors were 56% and 60% , respectively. Xilinx is subject to concentrations of credit risk primarily in its trade accounts receivable and investments in debt securities to the extent of the amounts recorded on the condensed consolidated balance sheet. The Company attempts to mitigate the concentration of credit risk in its trade receivables through its credit evaluation process, collection terms, distributor sales to diverse end customers and through geographical dispersion of sales. Xilinx generally does not require collateral for receivables from its end customers or distributors. No other distributor accounted for more than 10% of the Company’s worldwide net revenues for the second quarter and the first six months of fiscal 2020 and 2019 . One end customer accounted for 12% and 10% of the Company's worldwide net revenues for the second quarter and the first six months of fiscal 2020 , respectively. No end customer accounted for more than 10% of the Company's worldwide net revenues for the second quarter and the first six months of fiscal 2019 . The Company mitigates concentrations of credit risk in its investments in debt securities by currently investing approximately 95% of its portfolio in AA (or its equivalent) or higher-grade securities as rated by Standard & Poor’s or Moody’s Investors Service. The Company’s methods to arrive at investment decisions are not solely based on the rating agencies’ credit ratings. Xilinx also performs additional credit due diligence and conducts regular portfolio credit reviews, including a review of counterparty credit risk related to the Company’s forward currency exchange and interest rate swap contracts. Additionally, Xilinx limits its investments in the debt securities of a single issuer based upon the issuer’s credit rating and attempts to further mitigate credit risk by diversifying risk across geographies and type of issuer. As of September 28, 2019 , all of the mortgage-backed securities in the Company's investment portfolio were issued by U.S. government-sponsored enterprises and agencies and are rated AA+ by Standard & Poor’s and Aaa by Moody’s Investors Service.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Sep. 28, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The authoritative guidance for fair value measurements established by the FASB defines fair value as the exchange price that would be received from selling an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities required or permitted to be recorded at fair value, the Company considers the principal or most advantageous market in which Xilinx would transact and also considers assumptions that market participants would use when pricing the asset or liability, such as inherent risk, transfer restrictions and risk of nonperformance. The Company determines the fair value for marketable debt securities using industry standard pricing services, data providers and other third-party sources and by internally performing valuation testing and analysis. The Company primarily uses a consensus price or weighted-average price for its fair value assessment. The Company determines the consensus price using market prices from a variety of industry standard pricing services, data providers, security master files from large financial institutions and other third-party sources and uses those multiple prices as inputs into a distribution-curve-based algorithm to determine the daily market value. The pricing services use multiple inputs to determine market prices, including reportable trades, benchmark yield curves, credit spreads and broker/dealer quotes as well as other industry and economic events. For certain securities with short maturities, such as discount commercial paper and certificates of deposit, the security is accreted from purchase price to face value at maturity. If a subsequent transaction on the same security is observed in the marketplace, the price on the subsequent transaction is used as the current daily market price and the security will be accreted to face value based on the revised price. The Company validates the consensus prices by taking random samples from each asset type and corroborating those prices using reported trade activity, benchmark yield curves, binding broker/dealer quotes or other relevant price information. There have not been any changes to the Company’s fair value methodology during the second quarter of fiscal 2020 and the Company did not adjust or override any fair value measurements as of September 28, 2019 . Fair Value Hierarchy The fair value framework requires the categorization of assets and liabilities into three levels based upon the assumptions (inputs) used to price the assets or liabilities. The guidance for fair value measurements requires that assets and liabilities carried at fair value be classified and disclosed in one of the following categories: Level 1 — Quoted (unadjusted) prices in active markets for identical assets or liabilities. The Company’s Level 1 assets consist of U.S. government securities and money market funds. Level 2 — Observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the asset or liability. The Company’s Level 2 assets consist of financial institution securities, non-financial institution securities, U.S. agency securities, foreign government and agency securities, mortgage-backed securities, debt mutual funds, asset-backed securities and commercial mortgage-backed securities. The Company’s Level 2 assets and liabilities also include foreign currency forward contracts and interest rate swap contracts. Level 3 — Unobservable inputs to the valuation methodology that are supported by little or no market activity and that are significant to the measurement of the fair value of the assets or liabilities. Level 3 assets and liabilities include those whose fair value measurements are determined using pricing models, discounted cash flow methodologies or similar valuation techniques, as well as significant management judgment or estimation. The Company has no Level 3 assets and liabilities measured at fair value on a recurring basis. Assets and Liabilities Measured at Fair Value on a Recurring Basis In instances where the inputs used to measure fair value fall into different levels of the fair value hierarchy, the fair value measurement has been determined based on the lowest level input that is significant to the fair value measurement in its entirety. The Company’s assessment of the significance of a particular item to the fair value measurement in its entirety requires judgment, including the consideration of inputs specific to the asset or liability. The following tables present information about the Company’s assets and liabilities measured at fair value on a recurring basis as of September 28, 2019 and March 30, 2019 : September 28, 2019 (In thousands) Quoted Significant Significant Total Fair Assets Cash equivalents: Money market funds $ 648,128 $ — $ — $ 648,128 Financial institution securities — 205,479 — 205,479 Non-financial institution securities — 228,792 — 228,792 U.S. government and agency securities 114,800 41,491 — 156,291 Foreign government and agency securities — 199,733 — 199,733 Short-term investments: Financial institution securities — 225,000 — 225,000 Non-financial institution securities — 45,422 — 45,422 U.S. government and agency securities 20,479 28,103 — 48,582 Foreign government and agency securities — 29,875 — 29,875 Mortgage-backed securities — 446,303 — 446,303 Asset-backed securities — 26,360 — 26,360 Commercial mortgage-backed securities — 73,293 — 73,293 Debt mutual fund — 17,195 — 17,195 Total assets measured at fair value $ 783,407 $ 1,567,046 $ — $ 2,350,453 Liabilities Derivative financial instruments, net $ — $ 1,090 $ — $ 1,090 Total liabilities measured at fair value $ — $ 1,090 $ — $ 1,090 Net assets measured at fair value $ 783,407 $ 1,565,956 $ — $ 2,349,363 March 30, 2019 (In thousands) Quoted Significant Significant Total Fair Assets Cash equivalents: Money market funds $ 428,150 $ — $ — $ 428,150 Financial institution securities — 287,945 — 287,945 Non-financial institution securities — 461,884 — 461,884 U.S. government and agency securities 149,578 53,520 — 203,098 Foreign government and agency securities — 99,750 — 99,750 Short-term investments: Financial institution securities — 249,850 — 249,850 Non-financial institution securities — 240,040 — 240,040 U.S. government and agency securities 93,149 37,838 — 130,987 Foreign government and agency securities — 114,705 — 114,705 Mortgage-backed securities — 670,770 — 670,770 Debt mutual fund — 31,934 — 31,934 Asset-backed securities — 76,369 — 76,369 Commercial mortgage-backed securities — 116,539 — 116,539 Long-term investments: Debt mutual fund — 53,433 — 53,433 Total assets measured at fair value $ 670,877 $ 2,494,577 $ — $ 3,165,454 Liabilities Derivative financial instruments, net $ — $ 9,009 $ — $ 9,009 Total liabilities measured at fair value $ — $ 9,009 $ — $ 9,009 Net assets measured at fair value $ 670,877 $ 2,485,568 $ — $ 3,156,445 For certain of the Company’s financial instruments, including cash held in banks, accounts receivable and accounts payable, the carrying amounts approximate fair value due to their short maturities, and are therefore excluded from the fair value tables above. Financial Instruments Not Recorded at Fair Value on a Recurring Basis The Company's $500.0 million principal amount of 3.000% notes due March 15, 2021 (2021 Notes) and $750.0 million principal amount of 2.950% senior notes due June 1, 2024 (2024 Notes) are measured at fair value on a quarterly basis for disclosure purposes. The fair values of the 2021 Notes and 2024 Notes as of September 28, 2019 were approximately $505.6 million and $768.8 million , respectively, based on the last trading price for the period (classified as Level 2 in fair value hierarchy due to relatively low trading volume). Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis As of September 28, 2019 , the Company had non-marketable equity securities in private companies of $71.1 million , which were classified as Level 3 assets. The Company’s investments in non-marketable securities of private companies are recorded at fair value if the Company recognizes an observable price adjustment or an impairment. Such impairment losses or observable price adjustments were not material during all periods presented. The Company’s investments in non-financial assets such as property, plant and equipment, goodwill and acquisition-related intangibles, are recorded at cost (net of accumulated depreciation or amortization, where applicable). These non-financial assets are reduced to fair value when impaired.

Financial Instruments

Financial Instruments	6 Months Ended
	Sep. 28, 2019
Investments, All Other Investments [Abstract]
Financial Instruments	Financial Instruments The following is a summary of cash equivalents and available-for-sale securities as of the end of the periods presented: September 28, 2019 March 30, 2019 (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Money market funds $ 648,128 $ — $ — $ 648,128 $ 428,150 $ — $ — $ 428,150 Financial institution securities 430,479 — — 430,479 537,795 — — 537,795 Non-financial institution securities 274,264 10 (60 ) 274,214 702,483 3 (562 ) 701,924 U.S. government and agency securities 204,866 30 (23 ) 204,873 334,185 39 (139 ) 334,085 Foreign government and agency securities 229,608 — — 229,608 214,455 — — 214,455 Mortgage-backed securities 448,154 1,567 (3,418 ) 446,303 684,596 809 (14,635 ) 670,770 Asset-backed securities 26,388 18 (46 ) 26,360 76,852 — (483 ) 76,369 Commercial mortgage- backed securities 73,691 41 (439 ) 73,293 118,115 42 (1,618 ) 116,539 $ 2,335,578 $ 1,666 $ (3,986 ) $ 2,333,258 $ 3,096,631 $ 893 $ (17,437 ) $ 3,080,087 Financial institution securities include securities issued or managed by financial institutions in various forms, such as commercial paper and time deposits. Substantially all time deposits were issued by institutions outside the U.S. as of September 28, 2019 and March 30, 2019 . The following tables show the fair values and gross unrealized losses of the Company’s investments, aggregated by investment category, for individual securities that have been in a continuous unrealized loss position for the length of time specified, as of September 28, 2019 and March 30, 2019 : September 28, 2019 Less Than 12 Months 12 Months or Greater Total (In thousands) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Non-financial institution securities $ 3,705 $ (10 ) $ 4,184 $ (50 ) $ 7,889 $ (60 ) U.S. government and agency securities 9,981 (2 ) 13,127 (21 ) 23,108 (23 ) Mortgage-backed securities 76,433 (277 ) 236,370 (3,141 ) 312,803 (3,418 ) Asset-backed securities 3,180 (4 ) 18,583 (42 ) 21,763 (46 ) Commercial mortgage- backed securities 11,879 (24 ) 45,714 (415 ) 57,593 (439 ) $ 105,178 $ (317 ) $ 317,978 $ (3,669 ) $ 423,156 $ (3,986 ) March 30, 2019 Less Than 12 Months 12 Months or Greater Total (In thousands) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Non-financial institution securities $ 4,767 $ (4 ) $ 51,044 $ (558 ) $ 55,811 $ (562 ) U.S. government and agency securities — — 13,542 (139 ) 13,542 (139 ) Mortgage-backed securities 34,595 (480 ) 597,394 (14,155 ) 631,989 (14,635 ) Asset-backed securities — — 76,103 (483 ) 76,103 (483 ) Commercial mortgage- backed securities 1,354 (3 ) 112,294 (1,615 ) 113,648 (1,618 ) $ 40,716 $ (487 ) $ 850,377 $ (16,950 ) $ 891,093 $ (17,437 ) As of September 28, 2019 , the gross unrealized losses that had been outstanding for both less than twelve months and more than twelve months were primarily related to mortgage-backed securities, which was primarily due to the general rising of the interest-rate environment although the percentage of such losses to the total estimated fair value of the mortgage-backed securities was relatively insignificant. The Company reviewed the investment portfolio and determined that the gross unrealized losses on these investments as of September 28, 2019 and March 30, 2019 were temporary in nature as evidenced by the fluctuations in the gross unrealized losses within the investment categories. The marketable debt securities (financial institution securities, non-financial institution securities, U.S. and foreign government and agency securities, asset-backed securities, mortgage-backed securities and commercial mortgage-backed securities) are highly rated by the credit rating agencies, there have been no defaults on any of these securities and the Company has received interest payments as they become due. Therefore, the Company believes that it will be able to collect both principal and interest amount due to the Company. Additionally, in the past several years a portion of the Company's investment in the mortgage-backed securities was redeemed or prepaid by the debtors at par. Furthermore, the aggregate of individual unrealized losses that had been outstanding for twelve months or more was not significant as of September 28, 2019 and March 30, 2019 . The Company neither intends to sell these investments nor concludes that it is more-likely-than-not that it will have to sell them until recovery of their carrying values. The amortized cost and estimated fair value of marketable debt securities, by contractual maturity, are shown in the table below. Actual maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations without call or prepayment penalties. September 28, 2019 (In thousands) Amortized Estimated Due in one year or less $ 1,134,474 $ 1,134,470 Due after one year through five years 50,267 50,118 Due after five years through ten years 100,199 100,173 Due after ten years 402,510 400,369 $ 1,687,450 $ 1,685,130 As of September 28, 2019 , $550.7 million of marketable debt securities with contractual maturities of greater than one year were classified as short-term investments. Additionally, the above table does not include investments in money market funds and debt mutual funds because these investments do not have specific contractual maturities. Certain information related to available-for-sale securities is as follows: Three Months Ended Six Months Ended (In thousands) September 28, 2019 September 29, 2018 September 28, 2019 September 29, 2018 Proceeds from sale of available-for-sale securities $ 143,529 $ 7 $ 299,623 $ 903 Gross realized gains on sale of available-for-sale securities $ 607 $ — $ 1,212 $ 96 Gross realized losses on sale of available-for-sale securities (133 ) (1 ) (172 ) (48 ) Net realized gains (losses) on sale of available-for-sale securities $ 474 $ (1 ) $ 1,040 $ 48 Amortization of premiums on available-for-sale securities $ 1,636 $ 2,645 $ 2,347 $ 5,136 The cost of securities matured or sold is based on the specific identification method. The Company records the change in the fair value of its investment in debt mutual funds as part of its interest and other income, net. The change in fair value was a net increase of $4.1 million and $5.6 million for the three months and six months ended September 28, 2019 and resulted in a gain within interest and other income, net for the period. The change in fair value was a net decrease of $73 thousand and $6.3 million for the three months and six months ended September 29, 2018

Derivative Financial Instrument

Derivative Financial Instruments	6 Months Ended
	Sep. 28, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments The Company’s primary objective for holding derivative financial instruments is to manage foreign currency exchange rate risk and interest rate risk. As a result of the use of derivative financial instruments, the Company is exposed to the risk that counterparties to derivative contracts may fail to meet their contractual obligations. The Company manages counterparty credit risk in derivative contracts by reviewing counterparty creditworthiness on a regular basis, establishing collateral requirement and limiting exposure to any single counterparty. The right of set-off that exists with certain transactions enables the Company to net amounts due to and from the counterparty, reducing the maximum loss from credit risk in the event of counterparty default. In May 2017, the Company entered into interest rate swap contracts with certain independent financial institutions to manage interest rate risks related to fixed interest rate expenses from its 2024 Notes and floating interest rate income from its investments in marketable debt securities. The interest rate swap contracts were designated and qualified as fair value hedges of the 2024 Notes and were separately accounted for as a derivative. The interest rate swap contracts and the 2024 Notes were initially measured at fair value. Changes in fair values of the interest rate swap contracts and the 2024 Notes were recorded in the Company’s consolidated balance sheets. During the first quarter of fiscal 2020, the Company sold the interest rate swap contracts for an immaterial gain. The gain has been amortized as a reduction to interest expense over the remaining life of the 2024 Notes. As a result of the sale, the Company recorded the net change in fair value of the interest rate swap contracts of $11.7 million in the Company's condensed consolidated balance sheets. See “Note 10. Debt and Credit Facility” for more discussion related to interest rate swap contracts. There was no ineffectiveness during all periods presented.

Stock-Based Compensation Plans

Stock-Based Compensation Plans	6 Months Ended
	Sep. 28, 2019
Share-based Payment Arrangement [Abstract]
Stock-Based Compensation Plans	Stock-Based Compensation Plans The Company’s equity incentive plans are broad-based, long-term retention programs that cover employees, consultants and non-employee directors of the Company. These plans are intended to attract and retain talented employees, consultants and non-employee directors and to provide such persons with a proprietary interest in the Company. Stock-Based Compensation The following table summarizes stock-based compensation expense related to stock awards granted under the Company’s equity incentive plans and rights to acquire stock granted under the Company’s Employee Stock Purchase Plan (ESPP): Three Months Ended Six Months Ended (In thousands) September 28, 2019 September 29, 2018 September 28, 2019 September 29, 2018 Stock-based compensation included in: Cost of revenues $ 2,812 $ 2,249 $ 5,425 $ 4,284 Research and development 29,702 20,047 54,576 40,977 Selling, general and administrative 17,308 12,649 32,574 25,292 $ 49,822 $ 34,945 $ 92,575 $ 70,553 Employee Stock Option Plans The types of awards allowed under the 2007 Equity Incentive Plan (2007 Equity Plan) include incentive stock options, non-qualified stock options, restricted stock units (RSUs), restricted stock and stock appreciation rights. To date, the Company has issued a mix of non-qualified stock options and RSUs under the 2007 Equity Plan; however, there was no issuance of stock options during the first six months of fiscal 2020 and the entire fiscal 2019 . The Company's stock-based compensation expenses related to options during the first six months of fiscal 2020 and the number of options outstanding as of September 28, 2019 were not material. On August 8, 2019, the stockholders approved an amendment to increase the authorized number of shares reserved for issuance under the 2007 Equity Plan by 6.0 million shares. As of September 28, 2019 , 14.9 million shares remained available for grant under the 2007 Equity Plan. RSU Awards A summary of the Company’s RSU activity and related information is as follows: RSUs Outstanding (Shares in thousands) Number of Shares Weighted-Average Grant-Date Fair Value Per Share March 31, 2018 6,989 $ 51.39 Granted 3,559 $ 66.94 Vested (2,681 ) $ 49.05 Cancelled (536 ) $ 55.09 March 30, 2019 7,331 $ 59.54 Granted 2,556 $ 111.20 Vested (2,405 ) $ 53.40 Cancelled (172 ) $ 69.99 September 28, 2019 7,310 $ 79.38 The estimated fair values of RSUs were calculated based on the market price of Xilinx common stock on the date of grant, reduced by the present value of dividends expected to be paid on Xilinx common stock prior to vesting. The per share weighted-average fair value of RSUs granted during the second quarter of fiscal 2020 was $113.02 ( $62.79 for the second quarter of fiscal 2019 ), which were calculated based on estimates at the date of grant using the following weighted-average assumptions: Three Months Ended Six Months Ended September 28, 2019 September 29, 2018 September 28, 2019 September 29, 2018 Risk-free interest rate 1.8 % 2.7 % 1.8 % 2.7 % Dividend yield 1.3 % 2.2 % 1.3 % 2.2 % For the majority of RSUs granted, the number of shares of common stock issued on the date the RSU awards vest is net of the minimum statutory withholding requirements that the Company pays in cash to the appropriate taxing authorities on behalf of the Company's employees. During the first six months of fiscal 2020 and 2019 , the Company withheld $71.8 million and $39.5 million worth of RSU awards, respectively, to satisfy the employees’ tax obligations. During the second quarter and the first six months of fiscal 2020 , the Company realized excess tax benefits of $32.2 million and $34.3 million , respectively, primarily from RSU vesting. During the second quarter and the first six months of fiscal 2019 , the excess tax benefits were $7.8 million and $8.7 million , respectively, primarily from RSU vesting. These tax benefits were recorded in the condensed consolidated statements of income as a component of the provision (benefit) for income taxes. Employee Stock Purchase Plan Under the Company’s ESPP, shares are only issued during the second and fourth quarters of each fiscal year. Employees purchased 241 thousand shares for $ 19.7 million during the second quarter of fiscal 2020 and 359 thousand shares for $ 18.0 million during the second quarter of fiscal 2019 . The per-share weighted-average fair value of stock purchase rights granted under the ESPP during the second quarter of fiscal 2020 and 2019 was $33.79 and $19.06 , respectively. The fair values of stock purchase plan rights granted in the second quarter of fiscal 2020 and 2019 were estimated using the Black-Scholes option pricing model at the date of grant using the following assumptions: 2020 2019 Expected life of options (years) 1.25 1.25 Expected stock price volatility 0.37 0.29 Risk-free interest rate 1.9 % 2.5 % Dividend yield 1.3 % 2.0 % The next scheduled purchase under the ESPP is in the fourth quarter of fiscal 2020 . On August 8, 2019, the stockholders approved an amendment to increase the authorized number of shares reserved for issuance under the ESPP by 2.0 million shares. As of September 28, 2019 , 13.1 million

Net Income Per Common Share

Net Income Per Common Share	6 Months Ended
	Sep. 28, 2019
Earnings Per Share [Abstract]
Net Income Per Common Share	Net Income Per Common Share The computation of basic net income per common share for all periods presented is derived from information on the condensed consolidated statements of income, and there are no reconciling items in the numerator used to compute the diluted net income per common share. The following table summarizes the computation of basic and diluted net income per common share: Three Months Ended Six Months Ended (In thousands, except per share amounts) September 28, 2019 September 29, 2018 September 28, 2019 September 29, 2018 Net income available to common stockholders $ 226,993 $ 215,712 $ 468,452 $ 405,750 Weighted average common shares outstanding-basic 252,399 252,988 252,728 252,541 Dilutive effect of employee equity incentive plans 2,870 2,534 3,781 2,516 Weighted average common shares outstanding-diluted 255,269 255,522 256,509 255,057 Basic net income per common share $ 0.90 $ 0.85 $ 1.85 $ 1.61 Diluted net income per common share $ 0.89 $ 0.84 $ 1.83 $ 1.59 The total shares used in the denominator of the diluted net income per common share calculation include potentially dilutive common equivalent shares outstanding that are not included in basic net income per common share calculation. The diluted shares were calculated by applying the treasury stock method to the impact of the equity incentive plans. Certain shares of outstanding stock options and RSUs were excluded from diluted net income per common share calculation by applying the treasury stock method, as their inclusion would have been anti-dilutive. These excluded options and RSUs were immaterial for the second quarter and the first six months of fiscal 2020 , but could be dilutive in the future if the Company’s average share price increases and is greater than the combined exercise prices and the unamortized fair values of these options and RSUs.

Inventories

Inventories	6 Months Ended
	Sep. 28, 2019
Inventory Disclosure [Abstract]
Inventory Disclosure [Text Block]	Inventories Inventories are stated at the lower of actual cost (determined using the first-in, first-out method), or market (estimated net realizable value) and are comprised of the following: (In thousands) September 28, 2019 March 30, 2019 Raw materials $ 42,186 $ 39,727 Work-in-process 244,757 213,784 Finished goods 48,315 61,847 $ 335,258 $ 315,358

Debt and Credit Facility

Debt and Credit Facility	6 Months Ended
	Sep. 28, 2019
Debt Disclosure [Abstract]
Debt Disclosure [Text Block]	Debt and Credit Facility 2021 Notes On March 12, 2014, the Company issued the 2021 Notes at a discounted price of 99.281% of par. Interest on the 2021 Notes is payable semi-annually on March 15 and September 15. The Company received net proceeds of $495.4 million from issuance of the 2021 Notes, after the debt discount and deduction of debt issuance costs. The debt discounts and issuance costs are amortized to interest expense over the terms of the 2021 Notes. As of September 28, 2019 , the remaining term of the 2021 Notes is 1.5 years. The following table summarizes the carrying value of the 2021 Notes as of September 28, 2019 and March 30, 2019 : (In thousands) September 28, 2019 March 30, 2019 Principal amount of the 2021 Notes $ 500,000 $ 500,000 Unamortized discount of the 2021 Notes (792 ) (1,063 ) Unamortized debt issuance costs associated with 2021 Notes (345 ) (467 ) Carrying value of the 2021 Notes $ 498,863 $ 498,470 Interest expense related to the 2021 Notes was included in interest and other income, net on the condensed consolidated statements of income as follows: Three Months Ended Six Months Ended (In thousands) September 28, 2019 September 29, 2018 September 28, 2019 September 29, 2018 Contractual coupon interest $ 3,750 $ 3,750 $ 7,500 $ 7,500 Amortization of debt issuance costs 61 61 122 122 Amortization of debt discount, net 136 131 271 263 Total interest expense related to the 2021 Notes $ 3,947 $ 3,942 $ 7,893 $ 7,885 2024 Notes On May 30, 2017, the Company issued the 2024 Notes at a discounted price of 99.887% of par. Interest on the 2024 Notes is payable semi-annually on June 1 and December 1. The Company received $745.2 million from the issuance of the 2024 Notes, after the debt discount and deduction of debt issuance costs. The debt discounts and issuance costs are amortized to interest expense over the term of the 2024 Notes. As of September 28, 2019 , the remaining term of the 2024 Notes is approximately 4.7 years. In relation to the issuance of the 2024 Notes, the Company entered into interest rate swap contracts with certain independent financial institutions, whereby the Company paid on a semi-annual basis, a variable interest rate equal to the three-month London Interbank Offered Rate (LIBOR) plus 91.43 bps , and received on a semi-annual basis, interest income at a fixed interest rate of 2.950% . The Company did not incur any interest expense for the three months ended September 28, 2019 but incurred a net interest expense of $923 thousand for the six months ended September 28, 2019 , from the interest rate swap contracts, which was included in interest and other income, net on the condensed consolidated statements of income. The Company incurred a net interest expense of $642 thousand and $1.5 million for the three and six months ended September 29, 2018 , respectively, from the interest rate swap contracts, which was included in interest and other income, net on the condensed consolidated statements of income. During the first quarter of fiscal 2020 , the Company sold the interest rate swap contracts for an immaterial gain. The gain has been amortized as a reduction to interest expense over the remaining life of the 2024 Notes. The following table summarizes the carrying value of the 2024 Notes as of September 28, 2019 and March 30, 2019 : (In thousands) September 28, 2019 March 30, 2019 Principal amount of the 2024 Notes $ 750,000 $ 750,000 Unamortized discount of the 2024 Notes (584 ) (642 ) Unamortized debt issuance costs associated with 2024 Notes (2,648 ) (2,932 ) Carrying Value of the 2024 Notes $ 746,768 $ 746,426 Fair value hedge adjustment — interest rate swap contracts — (10,089 ) Net carrying value of the 2024 Notes $ 746,768 $ 736,337 Interest expense related to the 2024 Notes was included in interest and other income (expense), net on the condensed consolidated statements of income as follows: Three Months Ended Six Months Ended (In thousands) September 28, 2019 September 29, 2018 September 28, 2019 September 29, 2018 Contractual coupon interest (including interest rate swap, net) $ 5,444 $ 6,174 $ 11,986 $ 12,556 Amortization of debt issuance costs 142 142 284 284 Amortization of debt discount, net 29 27 58 56 Total interest expense related to the 2024 Notes $ 5,615 $ 6,343 $ 12,328 $ 12,896 Revolving Credit Facility On December 7, 2016 , the Company entered into a $400.0 million senior unsecured revolving credit facility that, upon certain conditions, may be extended by an additional $150.0 million , with a syndicate of banks (expiring in December 2021 ). Borrowings under the credit facility will bear interest at a benchmark rate plus an applicable margin based upon the Company’s credit rating. In connection with the credit facility, the Company is required to maintain certain financial and nonfinancial covenants. As of September 28, 2019 , the Company had made no borrowings under this credit facility and was not in violation of any of the covenants.

Common Stock Repurchase Program

Common Stock Repurchase Program	6 Months Ended
	Sep. 28, 2019
Stockholders' Equity Note [Abstract]
Common Stock and Debentures Repurchase Program [Text Block]	Common Stock Repurchase Program The Board of Directors (Board) has approved stock repurchase programs enabling the Company to repurchase its common stock in the open market or through negotiated transactions with independent financial institutions. On May 16, 2018, the Board authorized a repurchase program to repurchase the Company's common stock and debentures up to $500.0 million (2018 Repurchase Program). The 2018 Repurchase Program has no stated expiration date. Through September 28, 2019 , the Company had used $430.9 million of the $500.0 million authorized under the 2018 Repurchase Program, leaving $69.1 million available for future repurchases. The Company’s current policy is to retire all repurchased shares, and consequently, no treasury shares were held as of September 28, 2019 and March 30, 2019 . During the first six months of fiscal 2020 , the Company repurchased a total of 4.4 million shares for $477.2 million through a combination of open market and accelerated share repurchase program. Through open market, the Company repurchased 2.7 million shares of common stock for a total of $277.2 million . Additionally, the Company entered into a stock repurchase agreement with an independent financial institution to repurchase shares under the 2018 Repurchase Program. Under the agreement, the Company provided the financial institution with an up-front payment totaling $300.0 million during the first quarter of fiscal 2020. The financial institution delivered to the Company a certain number of shares based upon the volume weighted-average price, during an averaging period, less a specified discount. Under this arrangement, the Company received 1.7 million shares of common stock during the first six months of fiscal 2020 for $200.0 million . Accordingly, the Company received the balance of $100.0 million back from the financial institution during the second quarter of fiscal 2020 . The shares received by the Company were retired, accounted for as a reduction to stockholders' equity in the condensed consolidated balance sheets and treated as a repurchase of common stock for purposes of calculating earnings per share. During the first six months of fiscal 2019 , the Company repurchased 2.4 million shares of common stock in the open market with independent financial institutions for a total of $160.5 million .

Interest and Other Expense, Net

Interest and Other Expense, Net	6 Months Ended
	Sep. 28, 2019
Other Income and Expenses [Abstract]
Interest and Other Expense, Net	Interest and Other Income, Net The components of interest and other income, net are as follows: Three Months Ended Six Months Ended (In thousands) September 28, 2019 September 29, 2018 September 28, 2019 September 29, 2018 Interest income $ 13,813 $ 17,350 $ 31,801 $ 34,748 Interest expense (9,562 ) (13,164 ) (20,693 ) (26,536 ) Other income (expense), net 8,078 2,222 12,833 (4,651 ) Total interest and other income, net $ 12,329 $ 6,408 $ 23,941 $ 3,561

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	6 Months Ended
	Sep. 28, 2019
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Loss Comprehensive income (loss) is defined as the change in equity of a company during a period from transactions and other events and circumstances from non-owner sources. The components of the Company's accumulated other comprehensive loss are as follows: (In thousands) September 28, 2019 March 30, 2019 Accumulated unrealized losses on available-for-sale securities, net of tax $ (1,808 ) $ (12,725 ) Accumulated unrealized gains (losses) on hedging transactions, net of tax (1,767 ) 95 Accumulated cumulative translation adjustment, net of tax (13,561 ) (10,780 ) Total accumulated other comprehensive loss $ (17,136 ) $ (23,410 ) The related tax effects of other comprehensive income (loss) were not material for all periods presented.

Income Taxes

Income Taxes	6 Months Ended
	Sep. 28, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company recorded a tax benefit of $11.1 million and a tax provision of $9.9 million for the second quarter and the first six months of fiscal 2020 , respectively, representing effective tax rates of (5.2)% and 2.1% , respectively. The Company recorded tax provisions of $23.4 million and $46.3 million for the second quarter and the first six months of fiscal 2019 , respectively, representing effective tax rates of 9.8% and 10.2% , respectively. The difference between the U.S. federal statutory tax rate of 21% and the Company's effective tax rate in all periods presented was primarily due to the beneficial impact of income earned in lower tax rate jurisdictions and excess tax benefits with respect to stock-based compensation, which was partially offset by U.S. tax on global intangible low-taxed income. The Company’s total gross unrecognized tax benefits as of September 28, 2019 , determined in accordance with FASB authoritative guidance for measuring uncertain tax positions, increased by $18.3 million in the second quarter of fiscal 2020 to $167.1 million . The total amount of unrecognized tax benefits that, if realized in a future period, would favorably affect the effective tax rate was $51.2 million as of September 28, 2019 . Another $85.5 million would increase additional paid-in capital. The $85.5 million relates to an additional deduction claimed on federal and state amended tax returns (refund claim) for fiscal 2014 for repurchase premium paid in that year in connection with the early redemption of the Company’s 3.125% Junior Convertible debenture due March 15, 2037. After the close of the second quarter of fiscal 2020, the Company received written notification from the Internal Revenue Service that the Joint Committee on Taxation had completed its review of the Company's refund claim and had taken no exception. Accordingly, the unrecognized tax benefit of $85.5 million will be realized in the third quarter of fiscal 2020. It is reasonably possible that other changes to the Company's unrecognized tax benefits could be significant in the next twelve months due to tax audit settlements and lapses of statutes of limitation. As a result of uncertainties regarding tax audit settlements and their possible outcomes, an estimate of the range of increase or decrease that could occur in the next twelve months cannot be made. The Company’s policy is to include interest and penalties related to income tax liabilities within the provision (benefit) for income taxes on the condensed consolidated statements of income. The balance of accrued interest and penalties recorded in the condensed consolidated balance sheets and the amounts of interest and penalties included in the Company's provision (benefit) for income taxes were not material for all periods presented. The statutes of limitations have closed for U.S. federal income tax purposes for years through fiscal 2014, for U.S. state income tax purposes for years through fiscal 2010, and for Ireland income tax purposes for years through fiscal 2014. On July 27, 2015, the United States Tax Court (Tax Court) issued its opinion in Altera Corp. v. Commissioner, and, in a 15-0 decision, concluded that related parties in a cost sharing arrangement are not required to share expenses related to stock-based compensation. The Commissioner appealed the Tax Court decision to the Ninth Circuit Court of Appeals (Ninth Circuit). The Ninth Circuit overturned the Tax Court’s decision in an opinion issued on July 24, 2018, but subsequently withdrew it. After rehearing the arguments on October 16, 2018, the Ninth Circuit issued a subsequent opinion on June 7, 2019. In a 2-1 decision, the Ninth Circuit overturned the Tax Court’s decision. On July 22, 2019, Altera filed a petition for an en banc rehearing with the Ninth Circuit, which will consist of a panel of 11 judges. In the case of a denial of a Ninth Circuit en banc rehearing or a decision against Altera following an en banc rehearing, Altera can appeal to the United States Supreme Court for review. Since the Altera decision is not yet final, we believe the law to be unsettled and continue to record tax benefits as we exclude stock-based compensation costs from our cost sharing arrangement. As of the fiscal year ended March 30, 2019, the potential impact of a final adverse decision to the consolidated statement of income could be as much as $45.0 million for prior years' taxes and interest. We will continue to monitor developments in the Altera case and the potential effect on our consolidated financial statements.

Leases and Commitments

Leases and Commitments	6 Months Ended
	Sep. 28, 2019
Commitments and Contingencies Disclosure [Abstract]
Leases and Commitments	Leases and Commitments Xilinx leases some of its facilities and office buildings under non-cancelable operating leases that expire at various dates through August 2029 . Additionally, Xilinx entered into a land lease in conjunction with the Company’s building in Singapore, which will expire in November 2035 and the lease cost was settled in an up-front payment in June 2006. Some of the operating leases for facilities and office buildings require payment of operating costs, including property taxes, repairs, maintenance and insurance. Most of the Company’s leases contain renewal options for varying terms. T hese renewal terms can extend the lease term from 1 to 15 years, and are included in the lease term when it is reasonably certain that the Company will exercise the option. The following table presents the maturities of lease liabilities as of September 28, 2019 : Fiscal (In thousands) 2020 (remaining six months) $ 6,631 2021 11,382 2022 10,100 2023 6,778 2024 6,118 Thereafter 35,505 Total lease payments 76,514 Less: Imputed interest (17,507 ) Total lease liabilities $ 59,007 The Company's leases were included as a component of the following condensed consolidated balance sheet lines: (In thousands) September 28, 2019 Other assets $ 57,328 Other accrued liabilities 10,218 Other long-term liabilities 48,789 The components of lease costs were as follows: Three Months Ended Six Months Ended (In thousands) September 28, 2019 September 28, 2019 Operating lease cost $ 4,334 $ 8,606 Lease income (671 ) (1,467 ) Total lease cost $ 3,663 $ 7,139 Other information related to leases was as follows: Three Months Ended Six Months Ended (In thousands) September 28, 2019 September 28, 2019 Cash paid for operating leases included in operating cash flows $ 2,947 $ 6,079 September 28, 2019 Weighted-average remaining lease term - operating leases (in years) 7.9 Weighted-average remaining discount rate - operating leases 5.8 % Other commitments as of September 28, 2019 totaled $143.2 million and consisted of purchases of inventory and other non-cancelable purchase obligations related to subcontractors that manufacture silicon wafers and provide assembly and some test services. The Company expects to receive and pay for these materials and services in the next three to six months, as the products meet delivery and quality specifications. Additionally, as of September 28, 2019 , the Company also had $1.5 million of non-cancelable license obligations to providers of electronic design automation software and hardware/software maintenance, $4.2 million related to renovation of properties and $34.4 million commitments primarily related to open purchase orders from ordinary operations. These commitments expire at various dates through August 2024

Product Warranty and Indemnific

Product Warranty and Indemnification (Notes)	6 Months Ended
	Sep. 28, 2019
Product Warranties Disclosures [Abstract]
Product Warranty Disclosure [Text Block]	Product Warranty and Indemnification The Company generally sells products with a limited warranty for product quality. The Company provides an accrual for known product issues if a loss is probable and can be reasonably estimated. As of the end of the second quarter of fiscal 2020 and the end of fiscal 2019 , the accrual balances of the product warranty liability were immaterial. The Company offers, subject to certain terms and conditions, to indemnify customers and distributors for costs and damages awarded against these parties in the event the Company’s hardware products are found to infringe third-party intellectual property rights, including patents, copyrights or trademarks, and to compensate certain customers for limited specified costs they actually incur in the event the Company's hardware products experience epidemic failure. To a lesser extent, the Company may from time-to-time offer limited indemnification with respect to its software products. The terms and conditions of these indemnity obligations are limited by contract, which obligations are typically perpetual from the effective date of the agreement. The Company has historically received only a limited number of requests for indemnification under these provisions and has not made any significant payments pursuant to these provisions. The Company cannot estimate the maximum amount of potential future payments, if any, that the Company may be required to make as a result of these obligations due to the limited history of indemnification claims and the unique facts and circumstances that are likely to be involved in each particular claim and indemnification provision. However, there can be no assurances that the Company will not incur any financial liabilities in the future as a result of these obligations.

Contingencies

Contingencies	6 Months Ended
	Sep. 28, 2019
Loss Contingency [Abstract]
Contingencies	Contingencies Other Matters On June 11, 2015, John P. Neblett, as Chapter 7 Trustee of Valley Forge Composite Technologies, Inc., filed a complaint against Xilinx and others in the U.S. Bankruptcy Court for the Middle District of Pennsylvania (Bankruptcy No. 1:13-bk-05253-JJT). The complaint alleges causes of actions against Xilinx for negligence and civil conspiracy relating to alleged violations of U.S. export laws. It seeks at least $50.0 million in damages, together with punitive damages, from the defendants. On September 21, 2015, the action was withdrawn from the U.S. Bankruptcy Court for the Middle District of Pennsylvania and transferred to the U.S. District Court for the Eastern District of Kentucky. On November 2, 2015, Xilinx, along with other defendants, filed a motion to dismiss the complaint. On November 3, 2015, Xilinx filed a motion for sanctions pursuant to Federal Rule of Civil Procedure 11. On June 27, 2016, the Court denied both motions. On September 11, 2017, Xilinx, along with other defendants, filed motions for summary judgment seeking to dispose of all claims against them. On July 3, 2018, the Court granted both of Xilinx’s Motions for Summary Judgment, disposing of all claims asserted against Xilinx. On August 1, 2018, the Trustee filed a Notice of Appeal. On August 9, 2018, the Court of Appeals for the Sixth Circuit issued an Order to Show Cause requesting that the appellant address a possible jurisdictional defect. On August 29, 2018, the appellant responded to the Order to Show Cause. On September 10, 2018, appellees, including Xilinx, filed a joint reply. On January 7, 2019, the Court of Appeals issued an order dismissing the appeal for lack of jurisdiction. On February 19, 2019, the District Court issued an order permitting any party seeking to certify the case for appeal to file a motion. On March 11, 2019, defendant Avnet filed a motion to certify the case for appeal. On May 14, 2019 the Court denied Avnet’s motion. On June 4, 2019, Avnet and the counterclaim and crossclaim defendants stipulated to dismissal of Avnet’s remaining counterclaims and crossclaims. The Court entered final judgment on June 25, 2019. On July 22, 2019, the Trustee filed his notice of appeal and filed his opening appellate brief on September 17, 2019. From time to time, the Company is involved in various disputes and litigation matters that arise in the ordinary course of its business. These include disputes and lawsuits related to intellectual property, mergers and acquisitions, licensing, contract law, tax, regulatory, distribution arrangements, employee relations and other matters. Periodically, the Company reviews the status of each matter and assesses its potential financial exposure. If the potential loss from any claim or legal proceeding is considered probable and a range of possible losses can be estimated, the Company accrues a liability for the estimated loss. Legal proceedings are subject to uncertainties, and the outcomes are difficult to predict. Because of such uncertainties, accruals are based only on the best information available at the time. As additional information becomes available, the Company continues to reassess the potential liability related to pending claims and litigation and may revise estimates.

Goodwill and Acquisition-Relate

Goodwill and Acquisition-Related Intangibles	6 Months Ended
	Sep. 28, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Acquisition-Related Intangibles	Goodwill and Acquisition-Related Intangibles A summary of the goodwill and acquisitions-related intangibles balances as of September 28, 2019 and March 30, 2019 was as follows: Weighted-Average (In thousands) September 28, 2019 March 30, 2019 Amortization Life Goodwill $ 620,852 $ 340,718 Core technology, gross $ 201,216 $ 107,250 Less accumulated amortization (91,614 ) (82,611 ) Core technology, net 109,602 24,639 4.4 years Other intangibles, gross 95,759 51,016 Less accumulated amortization (50,211 ) (47,642 ) Other intangibles, net 45,548 3,374 4.3 years In-process research and development 64,907 52,710 Total acquisition-related intangibles, gross 361,882 210,976 Less total accumulated amortization (141,825 ) (130,253 ) Total acquisition-related intangibles, net $ 220,057 $ 80,723 Based on the carrying value of acquisition-related intangibles recorded as of September 28, 2019 , and assuming no subsequent acquisition or impairment of the underlying assets, the annual amortization expense for acquisition-related intangibles is expected to be as follows: Fiscal (In thousands) 2020 (remaining six months) $ 18,359 2021 36,696 2022 34,217 2023 32,207 2024 27,860 Thereafter 5,811 Total $ 155,150

Segment Information

Segment Information	6 Months Ended
	Sep. 28, 2019
Segment Reporting [Abstract]
Segment Information	Segment Information Xilinx designs, develops and markets programmable logic semiconductor devices and the related software design tools. The Company operates and tracks its results in one operating segment. Xilinx sells its products to OEMs and to electronic components distributors who resell these products to OEMs or subcontract manufacturers. Net revenues by geography for the periods indicated were as follows: Three Months Ended Six Months Ended (In thousands) September 28, 2019 September 29, 2018 September 28, 2019 September 29, 2018 North America $ 233,576 $ 207,837 $ 432,407 $ 401,280 Asia Pacific 422,891 326,875 854,072 630,767 Europe 123,845 153,493 277,133 285,422 Japan 53,054 58,047 119,386 113,153 Total net revenues $ 833,366 $ 746,252 $ 1,682,998 $ 1,430,622 Geographic revenue information for the second quarter of fiscal 2020 and 2019 reflects the geographic location of the distributors or OEMs who purchased the Company's products. This may differ from the geographic location of the end customers.

Business Combination

Business Combination	6 Months Ended
	Sep. 28, 2019
Business Combinations [Abstract]
Business Combination	Business Combination In July 2019, the Company completed the acquisition of Solarflare by acquiring all of its outstanding ordinary shares. Solarflare is a leading provider of high-performance, low latency networking solutions for customers spanning FinTech to cloud computing. This acquisition enables the Company to combine its industry leading solutions with Solarflare's ultra-low latency network interface card (NIC) technology and onload application acceleration software, to enable new converged SmartNIC solutions. Total purchase consideration to acquire Solarflare was approximately $400.0 million , including $8.4 million of fair value from the Company's preexisting investment in Solarflare and net of $6.8 million of cash acquired. The Company incurred $4.2 million of acquisition related costs, which was recorded as operating expenses in the Company's condensed consolidated statements of income. Additionally, the Company was required to assess the fair value of its preexisting investment in Solarflare and, as a result, recorded an immaterial gain in its condensed consolidated statements of income as part of interest and other income, net. The Company allocated the purchase price to tangible and identified intangible assets acquired and liabilities assumed based on estimated fair values. As additional information becomes available, such as the finalization of the estimated fair value of tax-related items, the Company may further update the preliminary purchase price allocation during the remainder of the measurement period (up to one year from the acquisition date). The preliminary fair values of the assets acquired and liabilities assumed in the acquisition of Solarflare, by major class, were recognized as follows: Amount (In thousands) Cash and cash equivalents $ 6,765 Tangible assets 19,631 Deferred tax assets 44,016 Identifiable intangible assets 106,000 Goodwill 239,197 Current liabilities (10,624 ) Non-current liabilities (4,238 ) Total $ 400,747 The goodwill of $239.2 million arising from the acquisition is attributed to the expected synergies and other benefits that will be generated from the combination of the Company and Solarflare. The goodwill recognized is not deductible for tax purposes. The identified intangible assets assumed in the acquisition of Solarflare were recognized as follows, based upon the preliminary fair values as of the closing date of the acquisition. Amount Amortization Life (In thousands) Trade names & trademarks $ 2,000 2.0 years Developed technology 34,000 5.0 years Customer relationships 40,000 5.0 years In-process research and development 30,000 N/A Total identifiable intangible assets $ 106,000

Subsequent Events (Notes)

Subsequent Events (Notes)	6 Months Ended
	Sep. 28, 2019
Subsequent Events [Abstract]
Subsequent Events [Text Block]	On October 22, 2019 , the Board declared a cash dividend of $0.37 per common share for the third quarter of fiscal 2020 . The dividend is payable on December 3, 2019 to stockholders of record on November 12, 2019 . On October 23, 2019, the Board increased the Company’s authorization to repurchase its common stock and debentures by $1.00 billion

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Sep. 28, 2019
Fair Value Disclosures [Abstract]
Assets and liabilities measured at fair value on a recurring basis	The following tables present information about the Company’s assets and liabilities measured at fair value on a recurring basis as of September 28, 2019 and March 30, 2019 : September 28, 2019 (In thousands) Quoted Significant Significant Total Fair Assets Cash equivalents: Money market funds $ 648,128 $ — $ — $ 648,128 Financial institution securities — 205,479 — 205,479 Non-financial institution securities — 228,792 — 228,792 U.S. government and agency securities 114,800 41,491 — 156,291 Foreign government and agency securities — 199,733 — 199,733 Short-term investments: Financial institution securities — 225,000 — 225,000 Non-financial institution securities — 45,422 — 45,422 U.S. government and agency securities 20,479 28,103 — 48,582 Foreign government and agency securities — 29,875 — 29,875 Mortgage-backed securities — 446,303 — 446,303 Asset-backed securities — 26,360 — 26,360 Commercial mortgage-backed securities — 73,293 — 73,293 Debt mutual fund — 17,195 — 17,195 Total assets measured at fair value $ 783,407 $ 1,567,046 $ — $ 2,350,453 Liabilities Derivative financial instruments, net $ — $ 1,090 $ — $ 1,090 Total liabilities measured at fair value $ — $ 1,090 $ — $ 1,090 Net assets measured at fair value $ 783,407 $ 1,565,956 $ — $ 2,349,363 March 30, 2019 (In thousands) Quoted Significant Significant Total Fair Assets Cash equivalents: Money market funds $ 428,150 $ — $ — $ 428,150 Financial institution securities — 287,945 — 287,945 Non-financial institution securities — 461,884 — 461,884 U.S. government and agency securities 149,578 53,520 — 203,098 Foreign government and agency securities — 99,750 — 99,750 Short-term investments: Financial institution securities — 249,850 — 249,850 Non-financial institution securities — 240,040 — 240,040 U.S. government and agency securities 93,149 37,838 — 130,987 Foreign government and agency securities — 114,705 — 114,705 Mortgage-backed securities — 670,770 — 670,770 Debt mutual fund — 31,934 — 31,934 Asset-backed securities — 76,369 — 76,369 Commercial mortgage-backed securities — 116,539 — 116,539 Long-term investments: Debt mutual fund — 53,433 — 53,433 Total assets measured at fair value $ 670,877 $ 2,494,577 $ — $ 3,165,454 Liabilities Derivative financial instruments, net $ — $ 9,009 $ — $ 9,009 Total liabilities measured at fair value $ — $ 9,009 $ — $ 9,009 Net assets measured at fair value $ 670,877 $ 2,485,568 $ — $ 3,156,445
Changes in Level 3 instruments measured at fair value on a recurring basis	Financial Instruments Not Recorded at Fair Value on a Recurring Basis The Company's $500.0 million principal amount of 3.000% notes due March 15, 2021 (2021 Notes) and $750.0 million principal amount of 2.950% senior notes due June 1, 2024 (2024 Notes) are measured at fair value on a quarterly basis for disclosure purposes. The fair values of the 2021 Notes and 2024 Notes as of September 28, 2019 were approximately $505.6 million and $768.8 million , respectively, based on the last trading price for the period (classified as Level 2 in fair value hierarchy due to relatively low trading volume).

Financial Instruments (Tables)

Financial Instruments (Tables)	6 Months Ended
	Sep. 28, 2019
Investments, All Other Investments [Abstract]
Available-for-sale securities	The following is a summary of cash equivalents and available-for-sale securities as of the end of the periods presented: September 28, 2019 March 30, 2019 (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Money market funds $ 648,128 $ — $ — $ 648,128 $ 428,150 $ — $ — $ 428,150 Financial institution securities 430,479 — — 430,479 537,795 — — 537,795 Non-financial institution securities 274,264 10 (60 ) 274,214 702,483 3 (562 ) 701,924 U.S. government and agency securities 204,866 30 (23 ) 204,873 334,185 39 (139 ) 334,085 Foreign government and agency securities 229,608 — — 229,608 214,455 — — 214,455 Mortgage-backed securities 448,154 1,567 (3,418 ) 446,303 684,596 809 (14,635 ) 670,770 Asset-backed securities 26,388 18 (46 ) 26,360 76,852 — (483 ) 76,369 Commercial mortgage- backed securities 73,691 41 (439 ) 73,293 118,115 42 (1,618 ) 116,539 $ 2,335,578 $ 1,666 $ (3,986 ) $ 2,333,258 $ 3,096,631 $ 893 $ (17,437 ) $ 3,080,087
Fair values and gross unrealized losses of the investments	The following tables show the fair values and gross unrealized losses of the Company’s investments, aggregated by investment category, for individual securities that have been in a continuous unrealized loss position for the length of time specified, as of September 28, 2019 and March 30, 2019 : September 28, 2019 Less Than 12 Months 12 Months or Greater Total (In thousands) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Non-financial institution securities $ 3,705 $ (10 ) $ 4,184 $ (50 ) $ 7,889 $ (60 ) U.S. government and agency securities 9,981 (2 ) 13,127 (21 ) 23,108 (23 ) Mortgage-backed securities 76,433 (277 ) 236,370 (3,141 ) 312,803 (3,418 ) Asset-backed securities 3,180 (4 ) 18,583 (42 ) 21,763 (46 ) Commercial mortgage- backed securities 11,879 (24 ) 45,714 (415 ) 57,593 (439 ) $ 105,178 $ (317 ) $ 317,978 $ (3,669 ) $ 423,156 $ (3,986 ) March 30, 2019 Less Than 12 Months 12 Months or Greater Total (In thousands) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Non-financial institution securities $ 4,767 $ (4 ) $ 51,044 $ (558 ) $ 55,811 $ (562 ) U.S. government and agency securities — — 13,542 (139 ) 13,542 (139 ) Mortgage-backed securities 34,595 (480 ) 597,394 (14,155 ) 631,989 (14,635 ) Asset-backed securities — — 76,103 (483 ) 76,103 (483 ) Commercial mortgage- backed securities 1,354 (3 ) 112,294 (1,615 ) 113,648 (1,618 ) $ 40,716 $ (487 ) $ 850,377 $ (16,950 ) $ 891,093 $ (17,437 )
Amortized cost and estimated fair value of marketable debt securities	September 28, 2019 (In thousands) Amortized Estimated Due in one year or less $ 1,134,474 $ 1,134,470 Due after one year through five years 50,267 50,118 Due after five years through ten years 100,199 100,173 Due after ten years 402,510 400,369 $ 1,687,450 $ 1,685,130
Information on sale of available-for-sale securities	Certain information related to available-for-sale securities is as follows: Three Months Ended Six Months Ended (In thousands) September 28, 2019 September 29, 2018 September 28, 2019 September 29, 2018 Proceeds from sale of available-for-sale securities $ 143,529 $ 7 $ 299,623 $ 903 Gross realized gains on sale of available-for-sale securities $ 607 $ — $ 1,212 $ 96 Gross realized losses on sale of available-for-sale securities (133 ) (1 ) (172 ) (48 ) Net realized gains (losses) on sale of available-for-sale securities $ 474 $ (1 ) $ 1,040 $ 48 Amortization of premiums on available-for-sale securities $ 1,636 $ 2,645 $ 2,347 $ 5,136

Stock-Based Compensation Plans

Stock-Based Compensation Plans (Tables)	6 Months Ended
	Sep. 28, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-Based compensation expense	The following table summarizes stock-based compensation expense related to stock awards granted under the Company’s equity incentive plans and rights to acquire stock granted under the Company’s Employee Stock Purchase Plan (ESPP): Three Months Ended Six Months Ended (In thousands) September 28, 2019 September 29, 2018 September 28, 2019 September 29, 2018 Stock-based compensation included in: Cost of revenues $ 2,812 $ 2,249 $ 5,425 $ 4,284 Research and development 29,702 20,047 54,576 40,977 Selling, general and administrative 17,308 12,649 32,574 25,292 $ 49,822 $ 34,945 $ 92,575 $ 70,553
Schedule of Share-based compensation, restricted stock units, valuation assumption [Table Text Block]	The per share weighted-average fair value of RSUs granted during the second quarter of fiscal 2020 was $113.02 ( $62.79 for the second quarter of fiscal 2019 ), which were calculated based on estimates at the date of grant using the following weighted-average assumptions: Three Months Ended Six Months Ended September 28, 2019 September 29, 2018 September 28, 2019 September 29, 2018 Risk-free interest rate 1.8 % 2.7 % 1.8 % 2.7 % Dividend yield 1.3 % 2.2 % 1.3 % 2.2 %
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions	The fair values of stock purchase plan rights granted in the second quarter of fiscal 2020 and 2019 were estimated using the Black-Scholes option pricing model at the date of grant using the following assumptions: 2020 2019 Expected life of options (years) 1.25 1.25 Expected stock price volatility 0.37 0.29 Risk-free interest rate 1.9 % 2.5 % Dividend yield 1.3 % 2.0 %
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Summary of restricted stock unit activity and related information	A summary of the Company’s RSU activity and related information is as follows: RSUs Outstanding (Shares in thousands) Number of Shares Weighted-Average Grant-Date Fair Value Per Share March 31, 2018 6,989 $ 51.39 Granted 3,559 $ 66.94 Vested (2,681 ) $ 49.05 Cancelled (536 ) $ 55.09 March 30, 2019 7,331 $ 59.54 Granted 2,556 $ 111.20 Vested (2,405 ) $ 53.40 Cancelled (172 ) $ 69.99 September 28, 2019 7,310 $ 79.38

Net Income Per Common Share Net

Net Income Per Common Share Net Income Per Common Share (Tables)	6 Months Ended
	Sep. 28, 2019
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	The following table summarizes the computation of basic and diluted net income per common share: Three Months Ended Six Months Ended (In thousands, except per share amounts) September 28, 2019 September 29, 2018 September 28, 2019 September 29, 2018 Net income available to common stockholders $ 226,993 $ 215,712 $ 468,452 $ 405,750 Weighted average common shares outstanding-basic 252,399 252,988 252,728 252,541 Dilutive effect of employee equity incentive plans 2,870 2,534 3,781 2,516 Weighted average common shares outstanding-diluted 255,269 255,522 256,509 255,057 Basic net income per common share $ 0.90 $ 0.85 $ 1.85 $ 1.61 Diluted net income per common share $ 0.89 $ 0.84 $ 1.83 $ 1.59

Inventories Inventories (Tables

Inventories Inventories (Tables)	6 Months Ended
	Sep. 28, 2019
Inventory Disclosure [Abstract]
Schedule of Inventory, Current [Table Text Block]	Inventories are stated at the lower of actual cost (determined using the first-in, first-out method), or market (estimated net realizable value) and are comprised of the following: (In thousands) September 28, 2019 March 30, 2019 Raw materials $ 42,186 $ 39,727 Work-in-process 244,757 213,784 Finished goods 48,315 61,847 $ 335,258 $ 315,358

Debt and Credit Facility (Table

Debt and Credit Facility (Tables)	6 Months Ended
	Sep. 28, 2019
2019 and 2021 Notes Payable [Member]
Schedule of Debt Instruments [Line Items]
Carrying values of liability and equity components of debentures	The following table summarizes the carrying value of the 2021 Notes as of September 28, 2019 and March 30, 2019 : (In thousands) September 28, 2019 March 30, 2019 Principal amount of the 2021 Notes $ 500,000 $ 500,000 Unamortized discount of the 2021 Notes (792 ) (1,063 ) Unamortized debt issuance costs associated with 2021 Notes (345 ) (467 ) Carrying value of the 2021 Notes $ 498,863 $ 498,470
Interest Expense Related to Debentures [Table Text Block]	Interest expense related to the 2021 Notes was included in interest and other income, net on the condensed consolidated statements of income as follows: Three Months Ended Six Months Ended (In thousands) September 28, 2019 September 29, 2018 September 28, 2019 September 29, 2018 Contractual coupon interest $ 3,750 $ 3,750 $ 7,500 $ 7,500 Amortization of debt issuance costs 61 61 122 122 Amortization of debt discount, net 136 131 271 263 Total interest expense related to the 2021 Notes $ 3,947 $ 3,942 $ 7,893 $ 7,885
Two Point and Nine Five Percent 2024 Senior Debentures [Member]
Schedule of Debt Instruments [Line Items]
Carrying values of liability and equity components of debentures	The following table summarizes the carrying value of the 2024 Notes as of September 28, 2019 and March 30, 2019 : (In thousands) September 28, 2019 March 30, 2019 Principal amount of the 2024 Notes $ 750,000 $ 750,000 Unamortized discount of the 2024 Notes (584 ) (642 ) Unamortized debt issuance costs associated with 2024 Notes (2,648 ) (2,932 ) Carrying Value of the 2024 Notes $ 746,768 $ 746,426 Fair value hedge adjustment — interest rate swap contracts — (10,089 ) Net carrying value of the 2024 Notes $ 746,768 $ 736,337
Interest Expense Related to Debentures [Table Text Block]	Interest expense related to the 2024 Notes was included in interest and other income (expense), net on the condensed consolidated statements of income as follows: Three Months Ended Six Months Ended (In thousands) September 28, 2019 September 29, 2018 September 28, 2019 September 29, 2018 Contractual coupon interest (including interest rate swap, net) $ 5,444 $ 6,174 $ 11,986 $ 12,556 Amortization of debt issuance costs 142 142 284 284 Amortization of debt discount, net 29 27 58 56 Total interest expense related to the 2024 Notes $ 5,615 $ 6,343 $ 12,328 $ 12,896

Interest And Other Expense, N_2

Interest And Other Expense, Net (Tables)	6 Months Ended
	Sep. 28, 2019
Other Income and Expenses [Abstract]
Components of interest and other expense, net	The components of interest and other income, net are as follows: Three Months Ended Six Months Ended (In thousands) September 28, 2019 September 29, 2018 September 28, 2019 September 29, 2018 Interest income $ 13,813 $ 17,350 $ 31,801 $ 34,748 Interest expense (9,562 ) (13,164 ) (20,693 ) (26,536 ) Other income (expense), net 8,078 2,222 12,833 (4,651 ) Total interest and other income, net $ 12,329 $ 6,408 $ 23,941 $ 3,561

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Sep. 28, 2019
Equity [Abstract]
Components of accumulated other comprehensive income (loss)	The components of the Company's accumulated other comprehensive loss are as follows: (In thousands) September 28, 2019 March 30, 2019 Accumulated unrealized losses on available-for-sale securities, net of tax $ (1,808 ) $ (12,725 ) Accumulated unrealized gains (losses) on hedging transactions, net of tax (1,767 ) 95 Accumulated cumulative translation adjustment, net of tax (13,561 ) (10,780 ) Total accumulated other comprehensive loss $ (17,136 ) $ (23,410 )

Leases and Commitments (Tables)

Leases and Commitments (Tables)	6 Months Ended
	Sep. 28, 2019
Commitments and Contingencies Disclosure [Abstract]
Future minimum lease payments under non-cancelable operating leases	: Fiscal (In thousands) 2020 (remaining six months) $ 6,631 2021 11,382 2022 10,100 2023 6,778 2024 6,118 Thereafter 35,505 Total lease payments 76,514 Less: Imputed interest (17,507 ) Total lease liabilities $ 59,007
Operating Lease, Assets And Liabilities	The Company's leases were included as a component of the following condensed consolidated balance sheet lines: (In thousands) September 28, 2019 Other assets $ 57,328 Other accrued liabilities 10,218 Other long-term liabilities 48,789
Lease, Cost	The components of lease costs were as follows: Three Months Ended Six Months Ended (In thousands) September 28, 2019 September 28, 2019 Operating lease cost $ 4,334 $ 8,606 Lease income (671 ) (1,467 ) Total lease cost $ 3,663 $ 7,139 Other information related to leases was as follows: Three Months Ended Six Months Ended (In thousands) September 28, 2019 September 28, 2019 Cash paid for operating leases included in operating cash flows $ 2,947 $ 6,079
Schedule of Weighted-Average Remaining Lease Term and Discount Rate	September 28, 2019 Weighted-average remaining lease term - operating leases (in years) 7.9 Weighted-average remaining discount rate - operating leases 5.8 %

Goodwill and Acquisition-Rela_2

Goodwill and Acquisition-Related Intangibles (Tables)	6 Months Ended
	Sep. 28, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Gross and net amounts of goodwill and of acquisition-related intangibles	A summary of the goodwill and acquisitions-related intangibles balances as of September 28, 2019 and March 30, 2019 was as follows: Weighted-Average (In thousands) September 28, 2019 March 30, 2019 Amortization Life Goodwill $ 620,852 $ 340,718 Core technology, gross $ 201,216 $ 107,250 Less accumulated amortization (91,614 ) (82,611 ) Core technology, net 109,602 24,639 4.4 years Other intangibles, gross 95,759 51,016 Less accumulated amortization (50,211 ) (47,642 ) Other intangibles, net 45,548 3,374 4.3 years In-process research and development 64,907 52,710 Total acquisition-related intangibles, gross 361,882 210,976 Less total accumulated amortization (141,825 ) (130,253 ) Total acquisition-related intangibles, net $ 220,057 $ 80,723
Schedule of expected annual amortization expense for acquisition-related intangibles	Based on the carrying value of acquisition-related intangibles recorded as of September 28, 2019 , and assuming no subsequent acquisition or impairment of the underlying assets, the annual amortization expense for acquisition-related intangibles is expected to be as follows: Fiscal (In thousands) 2020 (remaining six months) $ 18,359 2021 36,696 2022 34,217 2023 32,207 2024 27,860 Thereafter 5,811 Total $ 155,150

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Sep. 28, 2019
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	Net revenues by geography for the periods indicated were as follows: Three Months Ended Six Months Ended (In thousands) September 28, 2019 September 29, 2018 September 28, 2019 September 29, 2018 North America $ 233,576 $ 207,837 $ 432,407 $ 401,280 Asia Pacific 422,891 326,875 854,072 630,767 Europe 123,845 153,493 277,133 285,422 Japan 53,054 58,047 119,386 113,153 Total net revenues $ 833,366 $ 746,252 $ 1,682,998 $ 1,430,622

Business Combination (Tables)

Business Combination (Tables)	6 Months Ended
	Sep. 28, 2019
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The preliminary fair values of the assets acquired and liabilities assumed in the acquisition of Solarflare, by major class, were recognized as follows: Amount (In thousands) Cash and cash equivalents $ 6,765 Tangible assets 19,631 Deferred tax assets 44,016 Identifiable intangible assets 106,000 Goodwill 239,197 Current liabilities (10,624 ) Non-current liabilities (4,238 ) Total $ 400,747
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination	The identified intangible assets assumed in the acquisition of Solarflare were recognized as follows, based upon the preliminary fair values as of the closing date of the acquisition. Amount Amortization Life (In thousands) Trade names & trademarks $ 2,000 2.0 years Developed technology 34,000 5.0 years Customer relationships 40,000 5.0 years In-process research and development 30,000 N/A Total identifiable intangible assets $ 106,000

Recent Accounting Changes and_2

Recent Accounting Changes and Accounting Pronouncements Recent Accounting Standards (Details) - USD ($) $ in Thousands	Sep. 28, 2019	Jun. 29, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease asset	$ 57,328
Total lease liabilities	$ 59,007
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease asset		$ 50,000
Total lease liabilities		$ 50,000

Significant Customers and Con_2

Significant Customers and Concentrations of Credit Risk (Details) - Customer	3 Months Ended		6 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018	Mar. 30, 2019
Concentration Risk [Line Items]
Percentage of Accounts Receivable Accounted From Company Distributor One	35.00%		35.00%		37.00%
Percentage of net revenues through resale of product from Company Distributor One	40.00%	46.00%	40.00%	49.00%
Number Of Distributors Accounted For Net Revenues	0		0	0
Number of End Customers Accounted For 10% or More of Net Revenues	1	0	1	0
Percentage of end customer accounted for more than 10% of revenue	12.00%		10.00%
Percentage of higher grade security investment in debt securities	95.00%		95.00%
Distribution For Subsequent Resale To OEMs [Member] | Revenue Benchmark [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	49.00%	56.00%	49.00%	60.00%

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands	Sep. 28, 2019	Mar. 30, 2019
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Available-for-sale Securities, Noncurrent	$ 0	$ 53,433
Fair Value, Recurring [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	2,350,453	3,165,454
Fair Value, Net Asset (Liability)	2,349,363	3,156,445
Fair Value, Recurring [Member] | Derivative Financial Instruments, Assets [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Financial Liabilities Fair Value Disclosure	1,090	9,009
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	783,407	670,877
Fair Value, Net Asset (Liability)	783,407	670,877
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Derivative Financial Instruments, Assets [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Financial Liabilities Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	1,567,046	2,494,577
Fair Value, Net Asset (Liability)	1,565,956	2,485,568
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Derivative Financial Instruments, Assets [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Financial Liabilities Fair Value Disclosure	1,090	9,009
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	0	0
Fair Value, Net Asset (Liability)	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Derivative Financial Instruments, Assets [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Financial Liabilities Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Cash And Cash Equivalents [Member] | Money Market Funds [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	648,128	428,150
Fair Value, Recurring [Member] | Cash And Cash Equivalents [Member] | Financial institution securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	205,479	287,945
Fair Value, Recurring [Member] | Cash And Cash Equivalents [Member] | Non-financial institution securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	228,792	461,884
Fair Value, Recurring [Member] | Cash And Cash Equivalents [Member] | U.S. Government and Agency Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	156,291	203,098
Fair Value, Recurring [Member] | Cash And Cash Equivalents [Member] | Foreign Government and Agency Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	199,733	99,750
Fair Value, Recurring [Member] | Cash And Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	648,128	428,150
Fair Value, Recurring [Member] | Cash And Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] | Financial institution securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Cash And Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] | Non-financial institution securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Cash And Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] | U.S. Government and Agency Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	114,800	149,578
Fair Value, Recurring [Member] | Cash And Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] | Foreign Government and Agency Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Cash And Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] | Money Market Funds [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Cash And Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] | Financial institution securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	205,479	287,945
Fair Value, Recurring [Member] | Cash And Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] | Non-financial institution securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	228,792	461,884
Fair Value, Recurring [Member] | Cash And Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. Government and Agency Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	41,491	53,520
Fair Value, Recurring [Member] | Cash And Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] | Foreign Government and Agency Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	199,733	99,750
Fair Value, Recurring [Member] | Cash And Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member] | Money Market Funds [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Cash And Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member] | Financial institution securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Cash And Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member] | Non-financial institution securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Cash And Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member] | U.S. Government and Agency Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Cash And Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member] | Foreign Government and Agency Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Financial institution securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	225,000	249,850
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Non-financial institution securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	45,422	240,040
Fair Value, Recurring [Member] | Short-Term Investments [Member] | U.S. Government and Agency Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	48,582	130,987
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Foreign Government and Agency Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	29,875	114,705
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Mortgage-Backed Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	446,303	670,770
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Debt Mutual Fund [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	17,195	31,934
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Asset-backed Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	26,360	76,369
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Commercial Mortgage Backed Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	73,293	116,539
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 1 [Member] | Financial institution securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 1 [Member] | Non-financial institution securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 1 [Member] | U.S. Government and Agency Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	20,479	93,149
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 1 [Member] | Foreign Government and Agency Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 1 [Member] | Mortgage-Backed Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 1 [Member] | Debt Mutual Fund [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 1 [Member] | Asset-backed Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 1 [Member] | Commercial Mortgage Backed Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 2 [Member] | Financial institution securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	225,000	249,850
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 2 [Member] | Non-financial institution securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	45,422	240,040
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. Government and Agency Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	28,103	37,838
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 2 [Member] | Foreign Government and Agency Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	29,875	114,705
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage-Backed Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	446,303	670,770
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 2 [Member] | Debt Mutual Fund [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	17,195	31,934
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 2 [Member] | Asset-backed Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	26,360	76,369
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial Mortgage Backed Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	73,293	116,539
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 3 [Member] | Financial institution securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 3 [Member] | Non-financial institution securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 3 [Member] | U.S. Government and Agency Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 3 [Member] | Foreign Government and Agency Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 3 [Member] | Mortgage-Backed Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 3 [Member] | Debt Mutual Fund [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 3 [Member] | Asset-backed Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial Mortgage Backed Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure	0	0
Fair Value, Recurring [Member] | Long-Term Investments [Member] | Debt Mutual Fund [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure		53,433
Fair Value, Recurring [Member] | Long-Term Investments [Member] | Fair Value, Inputs, Level 1 [Member] | Debt Mutual Fund [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure		0
Fair Value, Recurring [Member] | Long-Term Investments [Member] | Fair Value, Inputs, Level 2 [Member] | Debt Mutual Fund [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure		53,433
Fair Value, Recurring [Member] | Long-Term Investments [Member] | Fair Value, Inputs, Level 3 [Member] | Debt Mutual Fund [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure		0
Other Noncurrent Liabilities [Member] | Fair Value, Recurring [Member] | Derivative Financial Instruments, Assets [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Financial Liabilities Fair Value Disclosure	1,090	9,009
Other Noncurrent Liabilities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Derivative Financial Instruments, Assets [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Financial Liabilities Fair Value Disclosure	0	0
Other Noncurrent Liabilities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Derivative Financial Instruments, Assets [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Financial Liabilities Fair Value Disclosure	1,090	9,009
Other Noncurrent Liabilities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Derivative Financial Instruments, Assets [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Financial Liabilities Fair Value Disclosure	$ 0	$ 0

Fair Value Measurements (Deta_2

Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Sep. 28, 2019	Mar. 30, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Noncurrent	$ 0	$ 53,433
Cost Method Investments, Fair Value Disclosure	71,100
Three Point Zero Percent 2021 Senior Debentures [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Face Amount	$ 500,000
Debt Instrument, Interest Rate, Stated Percentage	3.00%
Debt Instrument, Maturity Date	Mar. 15, 2021
Fair value of convertible notes	$ 505,600
Two Point and Nine Five Percent 2024 Senior Debentures [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Face Amount	$ 750,000
Debt Instrument, Interest Rate, Stated Percentage	2.95%
Debt Instrument, Maturity Date	Jun. 1, 2024
Fair value of convertible notes	$ 768,800
Three Point Zero Percent 2021 Senior Debentures [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Face Amount	500,000	500,000
Two Point and Nine Five Percent 2024 Senior Debentures [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Face Amount	$ 750,000	$ 750,000
Debt Instrument, Interest Rate, Stated Percentage	2.95%

Financial Instruments (Details)

Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 28, 2019	Mar. 30, 2019
Available-for-sale securities
Amortized Cost	$ 2,335,578	$ 3,096,631
Gross Unrealized Gains	1,666	893
Gross Unrealized Losses	(3,986)	(17,437)
Estimated Fair Value	2,333,258	3,080,087
Money Market Funds [Member]
Available-for-sale securities
Amortized Cost	648,128	428,150
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	648,128	428,150
Financial institution securities [Member]
Available-for-sale securities
Amortized Cost	430,479	537,795
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	430,479	537,795
Non-financial institution securities [Member]
Available-for-sale securities
Amortized Cost	274,264	702,483
Gross Unrealized Gains	10	3
Gross Unrealized Losses	(60)	(562)
Estimated Fair Value	274,214	701,924
U.S. Government and Agency Securities [Member]
Available-for-sale securities
Amortized Cost	204,866	334,185
Gross Unrealized Gains	30	39
Gross Unrealized Losses	(23)	(139)
Estimated Fair Value	204,873	334,085
Foreign Government and Agency Securities [Member]
Available-for-sale securities
Amortized Cost	229,608	214,455
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	229,608	214,455
Mortgage-Backed Securities [Member]
Available-for-sale securities
Amortized Cost	448,154	684,596
Gross Unrealized Gains	1,567	809
Gross Unrealized Losses	(3,418)	(14,635)
Estimated Fair Value	446,303	670,770
Asset-backed Securities [Member]
Available-for-sale securities
Amortized Cost	26,388	76,852
Gross Unrealized Gains	18	0
Gross Unrealized Losses	(46)	(483)
Estimated Fair Value	26,360	76,369
Commercial Mortgage Backed Securities [Member]
Available-for-sale securities
Amortized Cost	73,691	118,115
Gross Unrealized Gains	41	42
Gross Unrealized Losses	(439)	(1,618)
Estimated Fair Value	$ 73,293	$ 116,539

Financial Instruments (Details

Financial Instruments (Details 1) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018	Mar. 30, 2019
Debt Securities, Available-for-sale [Line Items]
Equity Securities, FV-NI, Unrealized Gain (Loss)	$ 4,100	$ (73)	$ 5,600	$ (6,300)
Available-for-Sale Securities, Less Than 12 Months, Fair Value	105,178		105,178		$ 40,716
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses	(317)		(317)		(487)
Available-for-Sale Securities, 12 Months or Greater, Fair Value	317,978		317,978		850,377
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses	(3,669)		(3,669)		(16,950)
Available-for-Sale Securities, Fair Value, Total	423,156		423,156		891,093
Available-for-Sale Securities, Gross Unrealized Losses, Total	(3,986)		(3,986)		(17,437)
Non-financial institution securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-Sale Securities, Less Than 12 Months, Fair Value	3,705		3,705		4,767
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses	(10)		(10)		(4)
Available-for-Sale Securities, 12 Months or Greater, Fair Value	4,184		4,184		51,044
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses	(50)		(50)		(558)
Available-for-Sale Securities, Fair Value, Total	7,889		7,889		55,811
Available-for-Sale Securities, Gross Unrealized Losses, Total	(60)		(60)		(562)
U.S. Government and Agency Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-Sale Securities, Less Than 12 Months, Fair Value	9,981		9,981		0
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses	(2)		(2)		0
Available-for-Sale Securities, 12 Months or Greater, Fair Value	13,127		13,127		13,542
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses	(21)		(21)		(139)
Available-for-Sale Securities, Fair Value, Total	23,108		23,108		13,542
Available-for-Sale Securities, Gross Unrealized Losses, Total	(23)		(23)		(139)
Mortgage-Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-Sale Securities, Less Than 12 Months, Fair Value	76,433		76,433		34,595
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses	(277)		(277)		(480)
Available-for-Sale Securities, 12 Months or Greater, Fair Value	236,370		236,370		597,394
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses	(3,141)		(3,141)		(14,155)
Available-for-Sale Securities, Fair Value, Total	312,803		312,803		631,989
Available-for-Sale Securities, Gross Unrealized Losses, Total	(3,418)		(3,418)		(14,635)
Asset-backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-Sale Securities, Less Than 12 Months, Fair Value	3,180		3,180		0
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses	(4)		(4)		0
Available-for-Sale Securities, 12 Months or Greater, Fair Value	18,583		18,583		76,103
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses	(42)		(42)		(483)
Available-for-Sale Securities, Fair Value, Total	21,763		21,763		76,103
Available-for-Sale Securities, Gross Unrealized Losses, Total	(46)		(46)		(483)
Commercial Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-Sale Securities, Less Than 12 Months, Fair Value	11,879		11,879		1,354
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses	(24)		(24)		(3)
Available-for-Sale Securities, 12 Months or Greater, Fair Value	45,714		45,714		112,294
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses	(415)		(415)		(1,615)
Available-for-Sale Securities, Fair Value, Total	57,593		57,593		113,648
Available-for-Sale Securities, Gross Unrealized Losses, Total	$ (439)		$ (439)		$ (1,618)

Financial Instruments (Detail_2

Financial Instruments (Details 2) $ in Thousands	Sep. 28, 2019USD ($)
Amortized Cost
Due in one year or less	$ 1,134,474
Due after one year through five years	50,267
Due after five years through ten years	100,199
Due after ten years	402,510
Amortized Cost Total	1,687,450
Estimated Fair Value
Due in one year or less	1,134,470
Due after one year through five years	50,118
Due after five years through ten years	100,173
Due after ten years	400,369
Estimated Fair Value Total	1,685,130
Marketable debt securities with contractual maturities greater than one year but classified as short-term investment	$ 550,700

Financial Instruments (Detail_3

Financial Instruments (Details 3) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Investments, All Other Investments [Abstract]
Equity Securities, FV-NI, Unrealized Gain (Loss)	$ (4,100)	$ 73	$ (5,600)	$ 6,300
Proceeds from sale of available-for-sale securities	143,529	7	299,623	903
Gross realized gains on sale of available-for-sale securities	607	0	1,212	96
Gross realized losses on sale of available-for-sale securities	(133)	(1)	(172)	(48)
Net realized gains (losses) on sale of available-for-sale securities	474	(1)	1,040	48
Amortization of premiums on available-for-sale securities	$ 1,636	$ 2,645	$ 2,347	$ 5,136

Derivative Financial Instrume_2

Derivative Financial Instruments (Details Textual) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 29, 2019	Sep. 28, 2019
Derivative [Line Items]
Gain (Loss) on Fair Value Hedge Ineffectiveness, Net		$ 0
Interest Rate Swap [Member]
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability	$ 11,700,000

Stock-Based Compensation Plan_2

Stock-Based Compensation Plans (Details) - USD ($) $ in Thousands, shares in Millions	3 Months Ended		6 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Stock Based compensation expense
Stock-based compensation effect on income before taxes	$ 49,822	$ 34,945	$ 92,575	$ 70,553
Cost of Revenues [Member]
Stock Based compensation expense
Stock-based compensation effect on income before taxes	2,812	2,249	5,425	4,284
Research and Development [Member]
Stock Based compensation expense
Stock-based compensation effect on income before taxes	29,702	20,047	54,576	40,977
Selling, General and Administrative Expenses [Member]
Stock Based compensation expense
Stock-based compensation effect on income before taxes	$ 17,308	$ 12,649	$ 32,574	$ 25,292
Equity Plan 2007 [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized			6
Employee Stock Purchase Plan [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized			2

Stock-Based Compensation Plan_3

Stock-Based Compensation Plans Stock-Based Compensation Plans (Details 1)	3 Months Ended		6 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	1.80%	2.70%	1.80%	2.70%
Weighted average assumptions in estimation of fair value of stock options
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate	1.30%	2.20%	1.30%	2.20%

Stock-Based Compensation Plan_4

Stock-Based Compensation Plans Stock-Based Compensation Plans (Details 3) - Restricted Stock Units (RSUs) [Member] - $ / shares shares in Thousands	3 Months Ended		6 Months Ended	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Mar. 30, 2019
Number of Shares
Number of Shares, Beginning Balance (shares)			7,331	6,989
Number of Shares, Granted (shares)			2,556	3,559
Number of Shares, Vested (shares)			2,405	2,681
Number of Shares, Forfeited/Cancelled (shares)			172	536
Number of Shares, Ending Balance (shares)	7,310		7,310	7,331
Weighted-Average Grant-Date Fair Value Per Share
Weighted-Average Grant-Date Fair Value, Beginning Balance (usd per share)			$ 59.54	$ 51.39
Weighted-Average Grant-Date Fair Value, Granted (usd per share)	$ 113.02	$ 62.79	111.20	66.94
Weighted-Average Grant-Date Fair Value, Vested (usd per share)			53.40	49.05
Weighted-Average Grant-Date Fair Value, Forfeited/Cancelled (usd per share)			69.99	55.09
Weighted-Average Grant-Date Fair Value, Ending Balance (usd per share)	$ 79.38		$ 79.38	$ 59.54

Stock-Based Compensation Plan_5

Stock-Based Compensation Plans (Details 4)	3 Months Ended		6 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate (as a percent)	1.80%	2.70%	1.80%	2.70%
Dividend yield (as a percent)	1.30%	2.20%	1.30%	2.20%
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life of options (years)	1 year 3 months	1 year 3 months
Expected stock price volatility (as a percent)	37.00%	29.00%
Risk-free interest rate (as a percent)	1.90%	2.50%
Dividend yield (as a percent)	1.30%	2.00%

Stock-Based Compensation Plan_6

Stock-Based Compensation Plans (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018	Mar. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	$ 47,856	$ 15,797	$ 51,976	$ 21,078
Share-based Payment Arrangement, Expense, Tax Benefit	$ 32,200	$ 7,800	$ 34,300	8,700
Options, grants in period (shares)					0
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-Average Grant-Date Fair Value, Granted (usd per share)	$ 113.02	$ 62.79	$ 111.20		$ 66.94
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation			$ 71,800	$ 39,500
Equity Plan 2007 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized			6,000,000
Shares available for grant (shares)	14,900,000		14,900,000
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized			2,000,000
Weighted-Average Grant-Date Fair Value, Granted (usd per share)	$ 33.79	$ 19.06
ESPP shares issued during period (shares)	241,000	359,000
Value of ESPP shares issued during period	$ 19,700	$ 18,000
Shares available for grant (shares)	13,100,000		13,100,000

Net Income Per Common Share N_2

Net Income Per Common Share Net Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Debt Conversion [Line Items]
Net income	$ 226,993	$ 215,712	$ 468,452	$ 405,750
Weighted Average Number of Shares Outstanding, Basic	252,399	252,988	252,728	252,541
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	2,870	2,534	3,781	2,516
Weighted Average Number of Shares Outstanding, Diluted	255,269	255,522	256,509	255,057
Earnings Per Share, Basic	$ 0.90	$ 0.85	$ 1.85	$ 1.61
Earnings Per Share, Diluted	$ 0.89	$ 0.84	$ 1.83	$ 1.59

Inventories Inventories (Detail

Inventories Inventories (Details) - USD ($) $ in Thousands	Sep. 28, 2019	Mar. 30, 2019
Inventory Disclosure [Abstract]
Inventory, Raw Materials, Gross	$ 42,186	$ 39,727
Inventory, Work in Process, Gross	244,757	213,784
Inventory, Finished Goods, Gross	48,315	61,847
Inventory, Net	$ 335,258	$ 315,358

Debt and Credit Facility (Detai

Debt and Credit Facility (Details 1) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018	Mar. 29, 2014	Mar. 30, 2019	May 30, 2017	Mar. 12, 2014
Debt Instrument [Line Items]
Net interest rate received (paid) from interest rate swap		$ 642,000	$ 923,000	$ 1,500,000
Debt Instrument, Description of Variable Rate Basis			three-month London Interbank Offered Rate (LIBOR) plus 91.43 bps
Line of Credit Facility, Maximum Borrowing Capacity	$ 400,000,000		$ 400,000,000
AdditionalborrowingcapacityfromRevolvingCreditFacility	150,000,000		150,000,000
Line of Credit Facility, Average Outstanding Amount	0
Long-term Debt, Excluding Current Maturities	1,245,631,000		1,245,631,000			$ 1,234,807,000
Two Point and Nine Five Percent 2024 Senior Debentures [Member]
Debt Instrument [Line Items]
Discount Percent of Par							99.887%
Debt Instrument, Face Amount	$ 750,000,000		$ 750,000,000			750,000,000
Debt Instrument, Interest Rate, Stated Percentage	2.95%		2.95%
Debt Instrument, Unamortized Discount	$ (584,000)		$ (584,000)			(642,000)
Debt Issuance Costs, Noncurrent, Net	2,648,000		2,648,000			2,932,000
Long Term Debt, Carrying Value before Hedging Adjustment	746,768,000		746,768,000			746,426,000
Derivative, Amount of Hedged Item	0		0			(10,089,000)
Interest Expense, Debt, Excluding Amortization	5,444,000	6,174,000	11,986,000	12,556,000
Amortization of Debt Issuance Costs	142,000	142,000	284,000	284,000
Amortization of Debt Discount (Premium)	29,000	27,000	58,000	56,000
Interest Expense, Debt	$ 5,615,000	6,343,000	12,328,000	12,896,000
Proceeds from Issuance of Long-term Debt		745,200,000
Debt instrument, long term debt, remaining discount amortization period	4 years 8 months 12 days
Long-term Debt, Excluding Current Maturities	$ 746,768,000		746,768,000			736,337,000
Three Point Zero Percent 2021 Senior Debentures [Member]
Debt Instrument [Line Items]
Discount Percent of Par								99.281%
Debt Instrument, Face Amount	500,000,000		500,000,000			500,000,000
Debt Instrument, Unamortized Discount	(792,000)		(792,000)			(1,063,000)
Debt Issuance Costs, Noncurrent, Net	345,000		345,000			467,000
Interest Expense, Debt, Excluding Amortization	3,750,000	3,750,000	7,500,000	7,500,000
Amortization of Debt Issuance Costs	61,000	61,000	122,000	122,000
Amortization of Debt Discount (Premium)	136,000	131,000	271,000	263,000
Interest Expense, Debt	$ 3,947,000	$ 3,942,000	7,893,000	$ 7,885,000
Proceeds from Issuance of Long-term Debt					$ 495,400,000
Debt instrument, long term debt, remaining discount amortization period	1 year 6 months
Long-term Debt, Excluding Current Maturities	$ 498,863,000		$ 498,863,000			$ 498,470,000

Debt and Credit Facility (Det_2

Debt and Credit Facility (Details 2) - USD ($) $ in Thousands	Sep. 28, 2019	Mar. 30, 2019
Debt Disclosure [Abstract]
Long-term Debt, Excluding Current Maturities	$ 1,245,631	$ 1,234,807

Common Stock Repurchase Progr_2

Common Stock Repurchase Program (Details) - USD ($)	3 Months Ended	6 Months Ended
	Sep. 28, 2019	Sep. 28, 2019	Sep. 29, 2018	Jun. 29, 2019	Mar. 30, 2019	May 16, 2018
Accelerated Share Repurchases [Line Items]
Preferred stock, shares issued (none issued)	0	0			0
Preferred Stock, Shares Outstanding	0	0			0
Stock repurchased during period		$ 477,200,000	$ 160,500,000
Stock Repurchased During Period through Open Market, Shares		2,700,000
Stock Repurchased During Period through Open Market, Value		$ 277,200,000
Treasury shares	0	0			0
Stock Repurchased During Period, Shares		(4,400,000)	(2,400,000)
Repurchase Program Two Thousand Eighteen [Domain]
Accelerated Share Repurchases [Line Items]
Amount authorized for common stock repurchase						$ 500,000,000
Stock repurchased during period		$ 430,900,000
Total amount available for future repurchases	$ 69,100,000	$ 69,100,000
2018 Repurchase Program
Accelerated Share Repurchases [Line Items]
Accelerated Share Repurchases, Settlement (Payment) or Receipt				$ 300,000,000
Stock Repurchased During Period through ASR		1,700,000
Repurchase and retirement of common stock		$ 200,000,000
ASR Program, Remaining Repurchase Amount	$ 100,000,000

Interest and Other Expense, N_3

Interest and Other Expense, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Other Income and Expenses [Abstract]
Net interest rate received (paid) from interest rate swap		$ (642)	$ (923)	$ (1,500)
Components of interest and other expense
Interest income	$ 13,813	17,350	31,801	34,748
Interest expense	(9,562)	(13,164)	(20,693)	(26,536)
Other income (expense), net	8,078	2,222	12,833	(4,651)
Interest and other expense, net	$ 12,329	$ 6,408	$ 23,941	$ 3,561

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	Sep. 28, 2019	Mar. 30, 2019
Components of accumulated other comprehensive income (loss)
Accumulated unrealized losses on available-for-sale securities, net of tax	$ (1,808)	$ (12,725)
Accumulated unrealized losses on hedging transactions, net of tax	(1,767)	95
Accumulated cumulative translation adjustment, net of tax	(13,561)	(10,780)
Accumulated other comprehensive income (loss)	$ (17,136)	$ (23,410)

Income Taxes (Details Textual)

Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018	Mar. 30, 2019
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit)	$ (11,148)	$ 23,432	$ 9,943	$ 46,311
Effective Income Tax Rate Reconciliation, Percent	(5.20%)	9.80%	2.10%	10.20%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Unrecognized Tax Benefits, Period Increase (Decrease)	$ 18,300
Unrecognized Tax Benefits	167,100		$ 167,100
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	51,200		51,200
Unrecognized Tax Benefits That Would Impact Additional Paid-in Capital	$ 85,500		$ 85,500
Potential Impact of Adverse Decision for Prior Years Cost Sharing SBC					$ 45,000

Leases and Commitments - Sched

Leases and Commitments - Schedule of Maturity of lease liability (Details) $ in Thousands	Sep. 28, 2019USD ($)
Fiscal
2020 (remaining six months)	$ 6,631
2020	11,382
2021	10,100
2022	6,778
2023	6,118
Thereafter	35,505
Total	76,514
Less: Imputed interest	(17,507)
Total lease liabilities	$ 59,007

Leases and Commitments Narrativ

Leases and Commitments Narrative (Details) $ in Millions	3 Months Ended
	Sep. 28, 2019USD ($)
Other Commitments [Line Items]
Other commitments	$ 143.2
Electronic Design Automation Software And Hardware/Software Maintenance [Member]
Other Commitments [Line Items]
Other commitments	1.5
Property Renovation [Member]
Other Commitments [Line Items]
Other commitments	4.2
Open purchase Orders From Ordinary Operations [Member]
Other Commitments [Line Items]
Other commitments	$ 34.4
Maximum [Member]
Other Commitments [Line Items]
Purchase Commitments, Period for Payment	6 months
Minimum [Member]
Other Commitments [Line Items]
Purchase Commitments, Period for Payment	3 months

Leases and Commitments - Lease

Leases and Commitments - Lease Assets and Liabilities (Details) $ in Thousands	Sep. 28, 2019USD ($)
Leases [Abstract]
Other assets	$ 57,328
Other accrued liabilities	10,218
Other long-term liabilities	$ 48,789

Leases and Commitments - Compon

Leases and Commitments - Components of lease cost (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Sep. 28, 2019USD ($)	Sep. 28, 2019USD ($)
Leases [Abstract]
Operating lease cost	$ 4,334	$ 8,606
Lease income	59,007	59,007
Sublease Income	(671)	(1,467)
Total lease cost	$ 3,663	$ 7,139

Leases and Commitments - Other

Leases and Commitments - Other information (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Sep. 28, 2019USD ($)	Sep. 28, 2019USD ($)
Leases [Abstract]
Cash paid for operating leases included in operating cash flows	$ 2,947	$ 6,079
Weighted-average remaining lease term - operating leases (in years)	7 years 10 months 24 days	7 years 10 months 24 days
Weighted-average remaining discount rate - operating leases (as a percent)	5.80%	5.80%

Contingencies Contingencies (De

Contingencies Contingencies (Details) $ in Millions	3 Months Ended
	Sep. 28, 2019USD ($)
Commitments and Contingencies Disclosure [Abstract]
Loss Contingency, Damages Sought, Value	$ 50

Goodwill and Acquisition-Rela_3

Goodwill and Acquisition-Related Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 28, 2019	Mar. 30, 2019
Gross and net amounts of goodwill and of acquisition-related intangibles
Goodwill	$ 620,852	$ 340,718
Total acquisition-related intangibles, gross	361,882	210,976
Less accumulated amortization	(141,825)	(130,253)
Acquisition-related intangibles, net	220,057	80,723
Total	155,150
Core Technology [Member]
Gross and net amounts of goodwill and of acquisition-related intangibles
Total acquisition-related intangibles, gross	201,216	107,250
Less accumulated amortization	(91,614)	(82,611)
Total	$ 109,602	24,639
Weighted-Average Amortization Life	4 years 4 months 24 days
Other Intangibles [Member]
Gross and net amounts of goodwill and of acquisition-related intangibles
Total acquisition-related intangibles, gross	$ 95,759	51,016
Less accumulated amortization	(50,211)	(47,642)
Total	$ 45,548	3,374
Weighted-Average Amortization Life	4 years 3 months 18 days
In-process research and development
Gross and net amounts of goodwill and of acquisition-related intangibles
In-process research and development	$ 64,907	$ 52,710

Goodwill and Acquisition-Rela_4

Goodwill and Acquisition-Related Intangibles (Details 1) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of acquisition-related intangibles	$ 2,169	$ 839	$ 2,569	$ 1,199
Schedule of expected annual amortization expense for acquisition-related intangibles
2020 (remaining six months)	18,359		18,359
2021	36,696		36,696
2022	34,217		34,217
2023	32,207		32,207
2024	27,860		27,860
Thereafter	5,811		5,811
Total	$ 155,150		$ 155,150

Segment Information (Details)

Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Segment Reporting Information [Line Items]
Revenues	$ 833,366	$ 746,252	$ 1,682,998	$ 1,430,622
North America
Segment Reporting Information [Line Items]
Revenues	233,576	207,837	432,407	401,280
Asia Pacific
Segment Reporting Information [Line Items]
Revenues	422,891	326,875	854,072	630,767
Europe
Segment Reporting Information [Line Items]
Revenues	123,845	153,493	277,133	285,422
Japan
Segment Reporting Information [Line Items]
Revenues	$ 53,054	$ 58,047	$ 119,386	$ 113,153

Business Combination - Narrativ

Business Combination - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 28, 2019	Mar. 30, 2019
Business Acquisition [Line Items]
Goodwill	$ 620,852	$ 340,718
Solarflare
Business Acquisition [Line Items]
Consideration transferred including equity interest in acquiree held prior to combination	400,000
Fair value of equity interest in acquiree	8,400
Cash acquired	6,765
Acquisition related costs	4,200
Goodwill	$ 239,197

Business Combination - Assets A

Business Combination - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Sep. 28, 2019	Mar. 30, 2019
Business Acquisition [Line Items]
Goodwill	$ 620,852	$ 340,718
Solarflare
Business Acquisition [Line Items]
Cash and cash equivalents	6,765
Tangible assets	19,631
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets	44,016
Identifiable intangible assets	106,000
Goodwill	239,197
Current liabilities	(10,624)
Non-current liabilities	(4,238)
Total	$ 400,747

Business Combination - Intangib

Business Combination - Intangible Assets Acquired (Details) - Solarflare $ in Thousands	3 Months Ended
	Sep. 28, 2019USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Total identifiable intangible assets	$ 106,000
In-process research and development
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets acquired	30,000
Trade names & trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 2,000
Amortization Life	2 years
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 34,000
Amortization Life	5 years
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 40,000
Amortization Life	5 years

Subsequent Events (Details)

Subsequent Events (Details) - Subsequent Event [Member] - $ / shares shares in Millions	Oct. 23, 2019	Oct. 22, 2019
Subsequent Event [Line Items]
Common Stock, Dividends, Per Share, Declared		$ 0.37
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	1,000

Uncategorized Items - xlnx09282

Label	Element	Value
Accounting Standards Update 2016-16 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (13,776,000)
Accounting Standards Update 2016-16 [Member] | Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	(13,776,000)
Accounting Standards Update 2016-07 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	0
Accounting Standards Update 2016-07 [Member] | Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	(8,399,000)
Accounting Standards Update 2016-07 [Member] | AOCI Attributable to Parent [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 8,399,000