Xilinx (XLNX) 10-Q 29 Jan 16 2016 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Jan. 02, 2016	Jan. 15, 2016
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jan. 2, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
Entity Registrant Name	XILINX INC
Entity Central Index Key	743,988
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--04-02
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		255,539,932

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 02, 2016	Dec. 27, 2014	Jan. 02, 2016	Dec. 27, 2014
Net revenues	$ 566,235	$ 593,549	$ 1,642,815	$ 1,810,445
Cost of revenues	178,514	179,638	496,108	538,445
Gross margin	387,721	413,911	1,146,707	1,272,000
Operating expenses:
Research and development	141,378	133,455	398,246	393,803
Selling, general and administrative	84,470	88,076	251,374	274,472
Amortization of acquisition-related intangibles	1,769	2,371	5,306	7,167
Total operating expenses	227,617	223,902	654,926	675,442
Operating income	160,104	190,009	491,781	596,558
Interest and other expense, net	5,053	4,007	24,793	15,960
Income before income taxes	155,051	186,002	466,988	580,598
Provision for income taxes	24,232	17,536	61,155	67,005
Net income	$ 130,819	$ 168,466	$ 405,833	$ 513,593
Net income per common share:
Basic (in dollars per share)	$ 0.51	$ 0.64	$ 1.58	$ 1.93
Diluted (in dollars per share)	0.49	0.62	1.51	1.85
Cash dividends per common share	$ 0.31	$ 0.29	$ 0.93	$ 0.87
Shares used in per share calculations:
Basic (in shares)	256,450	262,881	257,491	266,299
Diluted (in shares)	269,611	273,795	268,716	277,709

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 02, 2016	Dec. 27, 2014	Jan. 02, 2016	Dec. 27, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 130,819	$ 168,466	$ 405,833	$ 513,593
Other comprehensive income (loss), net of tax:
Change in net unrealized gains (losses) on available-for-sale securities	(7,911)	(409)	(13,091)	3,822
Reclassification adjustment for (gains) losses on available-for-sale securities	8	(1,868)	(188)	(3,187)
Change in net unrealized losses on hedging transactions	(696)	(3,896)	(1,074)	(6,957)
Reclassification adjustment for losses on hedging transactions	2,166	1,786	6,110	768
Cumulative translation adjustment, net	(451)	(1,475)	(1,997)	(1,882)
Other comprehensive loss	(6,884)	(5,862)	(10,240)	(7,436)
Total comprehensive income	$ 123,935	$ 162,604	$ 395,593	$ 506,157

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jan. 02, 2016	Mar. 28, 2015	[1]
Current assets:
Cash and cash equivalents	$ 898,264	$ 892,572
Short-term investments	2,498,272	2,410,489
Accounts receivable, net	203,176	246,615
Inventories	195,969	231,328
Deferred tax assets	96,827	79,519
Prepaid expenses and other current assets	115,786	74,528
Total current assets	4,008,294	3,935,051
Property, plant and equipment, at cost	797,866	804,623
Accumulated depreciation and amortization	(517,625)	(503,585)
Net property, plant and equipment	280,241	301,038
Long-term investments	224,614	266,902
Goodwill	159,296	159,296
Acquisition-related intangibles, net	7,446	12,752
Other assets	218,266	223,026
Total Assets	4,898,157	4,898,065
Current liabilities:
Accounts payable	74,602	80,113
Accrued payroll and related liabilities	156,316	156,600
Income taxes payable	7,782	19,693
Deferred income on shipments to distributors	47,016	66,071
Other accrued liabilities	62,850	64,676
Current portion of long-term debt	584,343	576,053
Total current liabilities	932,909	963,206
Long-term debt	995,584	994,839
Deferred tax liabilities	347,995	289,868
Long-term income taxes payable	15,198	13,245
Other long-term liabilities	1,110	1,366
Commitments and contingencies	0	0
Temporary equity (Note 10)	15,657	23,947
Stockholders' equity:
Preferred stock, $.01 par value (none issued)	0	0
Common stock, $.01 par value	2,552	2,583
Additional paid-in capital	710,303	653,882
Retained earnings	1,898,238	1,966,278
Accumulated other comprehensive loss	(21,389)	(11,149)
Total stockholders’ equity	2,589,704	2,611,594
Total Liabilities, Temporary Equity and Stockholders’ Equity	$ 4,898,157	$ 4,898,065
[1]	Derived from audited financial statements

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Jan. 02, 2016	Mar. 28, 2015
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		9 Months Ended
		Jan. 02, 2016	Dec. 27, 2014
Cash flows from operating activities:
Net income		$ 405,833	$ 513,593
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation		38,768	40,857
Amortization		13,149	15,556
Stock-based compensation		84,464	79,900
Net gain on sale of available-for-sale securities		(599)	(5,508)
Amortization of debt discounts		9,033	9,014
Provision for deferred income taxes		49,435	19,712
Excess tax benefit from stock-based compensation		(12,326)	(16,669)
Changes in assets and liabilities:
Accounts receivable, net		43,439	80,337
Inventories		35,050	(12,299)
Prepaid expenses and other current assets		(148)	(11,703)
Other assets		(3,291)	(322)
Accounts payable		(5,511)	(91,464)
Accrued liabilities		4,909	1,640
Income taxes payable		(35,982)	5,710
Deferred income on shipments to distributors		(19,055)	(3,613)
Net cash provided by operating activities		607,168	624,741
Cash flows from investing activities:
Purchases of available-for-sale securities		(2,253,840)	(2,112,128)
Proceeds from sale and maturity of available-for-sale securities		2,183,296	2,646,410
Purchases of property, plant and equipment		(19,169)	(23,682)
Other investing activities		(5,700)	(7,440)
Net cash provided by (used in) investing activities		(95,413)	503,160
Cash flows from financing activities:
Repurchases of common stock		(299,998)	(476,012)
Proceeds from issuance of common stock through various stock plans, net		21,720	19,338
Payment of dividends to stockholders		(240,111)	(230,550)
Excess tax benefit from stock-based compensation		12,326	16,669
Net cash used in financing activities		(506,063)	(670,555)
Net increase in cash and cash equivalents		5,692	457,346
Cash and cash equivalents at beginning of period	[1]	892,572	973,677
Cash and cash equivalents at end of period		898,264	1,431,023
Supplemental disclosure of cash flow information:
Interest paid		28,563	28,776
Income taxes paid, net		$ 47,562	$ 41,252
[1]	Derived from audited financial statements

Basis of Presentation

Basis of Presentation	9 Months Ended
	Jan. 02, 2016
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 28, 2015 . 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 April 2, 2016 or any future period. The Company uses a 52- to 53-week fiscal year ending on the Saturday nearest March 31. Fiscal 2016 will be a 53-week year ending on April 2, 2016 , while fiscal 2015 was a 52-week year ending on March 28, 2015 . The third quarter of fiscal 2016 was a 14-week quarter ended on January 2, 2016 . The third quarter of fiscal 2015 was a 13-week quarter ended on December 27, 2014 .

Recent Accounting Changes and A

Recent Accounting Changes and Accounting Pronouncements	9 Months Ended
	Jan. 02, 2016
Accounting Changes and Error Corrections [Abstract]
Accounting Changes and Error Corrections [Text Block]	Recent Accounting Changes and Accounting Pronouncements In April 2014, the Financial Accounting Standards Board (FASB) issued the authoritative guidance that outlines a new global revenue recognition standard that replaces virtually all existing US GAAP guidance on contracts with customers and the related other assets and deferred costs. The guidance provides a five-step process for recognizing revenue that depicts the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The standard also requires expanded qualitative and quantitative disclosures relating to the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. In July 2015, FASB approved the deferral of the effective date of this guidance by one year. As a result, this guidance will be effective for the Company beginning in fiscal year 2019, with an option to early adopt in fiscal year 2018. The new standard is required to be applied retrospectively to each prior reporting period presented, or retrospectively with the cumulative effect of initially applying it recognized at the date of initial application. The Company is currently evaluating the impact of this new guidance on its consolidated financial statements, including selection of the transition method and the adoption date. In May 2015, the FASB issued the authoritative guidance that eliminates current requirement to categorize within the fair value hierarchy investments whose fair values are measured at net asset value using the practical expedient approach. Instead, entities will be required to disclose the fair values of such investments so that financial statement users can reconcile amounts reported in the fair value hierarchy table and the amounts reported on the balance sheet. This guidance is effective for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015, which for Xilinx would be the first quarter of fiscal year 2017 and should be applied using a retrospective approach. Earlier adoption is permitted. This guidance does not affect the underlying accounting for such investments. In July 2015, the FASB issued the authoritative guidance that requires an entity to measure inventory at the lower of cost or net realizable value (NRV). NRV is the estimated selling price in the ordinary course of business, less reasonably predictable cost of completion, disposal, and transportation. This guidance is effective for reporting periods beginning after December 15, 2016, including interim periods within those fiscal years, which for Xilinx would be the first quarter of fiscal year 2018. The amendments should be applied prospectively with earlier application permitted as of the beginning of an interim or annual reporting period. T he Company is currently evaluating the impact of this new guidance on its consolidated financial statements. In August 2015, the FASB issued the authoritative guidance that clarifies the guidance regarding presentation and subsequent measurement of debt issuance costs related to line-of-credit arrangements. This guidance clarifies that an entity may defer and present debt issuance costs as an asset and subsequently amortize the deferred debt issuance costs ratably over the term of the line-of-credit arrangement, regardless of whether there are any outstanding borrowings on the line-of-credit arrangement. The Company does not expect the adoption of this guidance to have significant impact on its consolidated financial statements. In September 2015, the FASB issued the authoritative guidance regarding simplifying the accounting for measurement-period adjustments in business combinations. This guidance eliminates the requirement for an acquirer in a business combination to account for adjustments it makes to the provisional amounts recorded for assets and liabilities retrospectively. Instead the acquirer must recognize these measurement-period adjustments during the period in which it determines the amounts, including the effect on earnings of any amounts they would have recorded in previous periods if the accounting had been completed at the acquisition date. This guidance is effective for public business entities for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. The Company will adopt this guidance in the first quarter of fiscal year 2017. In November 2015, the FASB issued the authoritative guidance regarding balance sheet classification of deferred taxes. The guidance requires companies to classify all deferred tax assets and liabilities as non-current on the balance sheet instead of separating deferred taxes into current and non-current amounts. This guidance is effective for public business entities for financial statements issued for annual periods beginning after December 15, 2016, and interim periods within those annual periods. The amendments can be applied retrospectively or prospectively with earlier application permitted as of the beginning of an interim or annual reporting period. This guidance will be effective for Xilinx beginning in the first quarter of fiscal year 2018. The Company is currently evaluating the impact of this new guidance on its consolidated financial statements. In January 2016, the FASB issued the final guidance regarding how companies measure equity investments that do not result in consolidation and are not accounted for under the equity method and how they present changes in the fair value of financial liabilities measured under the fair value option that are attributable to their own credit. The new guidance also changes certain disclosure requirements and other aspects of current US GAAP. It does not change the guidance for classifying and measuring investments in debt securities and loans. Early adoption is permitted. The guidance is effective for public business entities for annual periods beginning after December 15, 2017, and interim periods therein, which for Xilinx would be the first quarter of fiscal year 2019. The Company is currently evaluating the impact of this new guidance on its consolidated financial statements.

Significant Customers and Conce

Significant Customers and Concentrations of Credit Risk (Notes)	9 Months Ended
	Jan. 02, 2016
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 January 2, 2016 and March 28, 2015 , Avnet accounted for 51% and 67% of the Company’s total net accounts receivable, respectively. For the third quarter and first nine months of fiscal 2016 , resale of product through Avnet accounted for 49% and 50% of the Company’s worldwide net revenues, respectively. For the third quarter and the first nine months of fiscal 2015 , resale of product through Avnet accounted for 40% and 42% of the Company’s worldwide net revenues, 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 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 from distributors. No end customer accounted for more than 10% of the Company’s worldwide net revenues for the third quarter as well as the first nine months of fiscal 2016 and 2015 . The Company mitigates concentrations of credit risk in its investments in debt securities by currently investing approximately 88% of its portfolio in AA 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 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 January 2, 2016 , approximately 33% of the portfolio consisted of mortgage-backed securities. All of the mortgage-backed securities in the 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	9 Months Ended
	Jan. 02, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The 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. For certain other securities, such as student loan auction rate securities, the Company performs its own valuation analysis using a discounted cash flow pricing model. 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 first nine months of fiscal 2016 and the Company did not adjust or override any fair value measurements as of January 2, 2016 . 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 and agency 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, municipal bonds, U.S. government and agency securities, foreign government and agency securities, mortgage-backed securities, debt mutual funds, bank loans, asset-backed securities and commercial mortgage-backed securities. The Company’s Level 2 assets and liabilities also include foreign currency forward contracts and commodity 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’s Level 3 assets and liabilities include student loan auction rate securities. 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 January 2, 2016 and March 28, 2015 : January 2, 2016 (In thousands) Quoted Significant Significant Total Fair Assets Cash equivalents: Money market funds $ 222,433 $ — $ — $ 222,433 Financial institution securities — 63,995 — 63,995 Non-financial institution securities — 319,224 — 319,224 U.S. government and agency securities 25,007 55,486 — 80,493 Foreign government and agency securities — 54,997 — 54,997 Short-term investments: Financial institution securities — 264,950 — 264,950 Non-financial institution securities — 353,443 — 353,443 Municipal bonds — 59,019 — 59,019 U.S. government and agency securities 102,967 114,857 — 217,824 Foreign government and agency securities — 81,378 — 81,378 Asset-backed securities — 206,793 — 206,793 Mortgage-backed securities — 987,110 — 987,110 Debt mutual funds — 34,883 — 34,883 Bank loans — 102,652 — 102,652 Commercial mortgage-backed securities — 190,220 — 190,220 Long-term investments: Auction rate securities — — 10,111 10,111 Asset-backed securities — 6,874 — 6,874 Municipal bonds — 7,176 — 7,176 Mortgage-backed securities — 147,038 — 147,038 Debt mutual fund — 53,234 — 53,234 Commercial mortgage-backed securities — 181 — 181 Total assets measured at fair value $ 350,407 $ 3,103,510 $ 10,111 $ 3,464,028 Liabilities Derivative financial instruments, net $ — $ 2,638 $ — $ 2,638 Total liabilities measured at fair value $ — $ 2,638 $ — $ 2,638 Net assets measured at fair value $ 350,407 $ 3,100,872 $ 10,111 $ 3,461,390 March 28, 2015 (In thousands) Quoted Significant Significant Total Fair Assets Cash equivalents: Money market funds $ 235,583 $ — $ — $ 235,583 Financial institution securities — 229,999 — 229,999 Non-financial institution securities — 89,995 — 89,995 U.S. government and agency securities — 200,392 — 200,392 Foreign government and agency securities — 37,996 — 37,996 Short-term investments: Financial institution securities — 75,000 — 75,000 Non-financial institution securities — 339,029 — 339,029 Municipal Bonds — 40,006 — 40,006 U.S. government and agency securities 256,514 301,010 — 557,524 Foreign government and agency securities — 159,936 — 159,936 Mortgage-backed securities — 859,330 — 859,330 Debt mutual fund — 38,608 — 38,608 Bank loans — 98,100 — 98,100 Asset-backed securities — 204,510 — 204,510 Commercial mortgage-backed securities — 38,446 — 38,446 Long-term investments: Auction rate securities — — 10,312 10,312 Municipal bonds — 9,650 — 9,650 Mortgage-backed securities — 180,906 — 180,906 Debt mutual fund — 56,592 — 56,592 Asset-backed securities — 7,948 — 7,948 Commercial mortgage-backed securities — 1,494 — 1,494 Total assets measured at fair value $ 492,097 $ 2,968,947 $ 10,312 $ 3,471,356 Liabilities Derivative financial instruments, net $ — $ 9,251 $ — $ 9,251 Total liabilities measured at fair value $ — $ 9,251 $ — $ 9,251 Net assets measured at fair value $ 492,097 $ 2,959,696 $ 10,312 $ 3,462,105 Changes in Level 3 Instruments Measured at Fair Value on a Recurring Basis The following table is a reconciliation of all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3): Three Months Ended Nine Months Ended (In thousands) January 2, 2016 December 27, 2014 January 2, 2016 December 27, 2014 Balance as of beginning of period $ 10,413 $ 20,608 $ 10,312 $ 20,160 Total realized and unrealized gains (losses): Included in other comprehensive income (loss) (302 ) 717 (201 ) 1,165 Sales and settlements, net (1) — (11,000 ) — (11,000 ) Balance as of end of period $ 10,111 $ 10,325 $ 10,111 $ 10,325 (1) During the first nine months of fiscal 2015 , the Company redeemed $11.0 million of student loan auction rate securities for cash at par value. There was no redemption during the first nine months of fiscal 2016 . As of January 2, 2016 , marketable securities measured at fair value using Level 3 inputs were comprised of $10.1 million of student loan auction rate securities. There was no material change to the input assumptions of the pricing model for these student loan auction securities. Financial Instruments Not Recorded at Fair Value on a Recurring Basis The Company’s 2.625% Senior Convertible Debentures due June 15, 2017 (2017 Convertible Notes), 2.125% Notes due 2019 (2019 Notes) and 3.000% Notes due 2021 (2021 Notes) are measured at fair value on a quarterly basis for disclosure purposes. The fair values of the 2017 Convertible Notes, 2019 Notes and 2021 Notes as of January 2, 2016 were approximately $976.5 million , $497.3 million and $503.4 million , respectively, based on the last trading price of the respective debentures for the period (classified as Level 2 in fair value hierarchy due to relatively low trading volume).

Financial Instruments

Financial Instruments	9 Months Ended
	Jan. 02, 2016
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: January 2, 2016 March 28, 2015 (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 $ 222,433 $ — $ — $ 222,433 $ 235,583 $ — $ — $ 235,583 Financial institution securities 328,945 — — 328,945 304,999 — — 304,999 Non-financial institution securities 673,436 38 (807 ) 672,667 429,005 25 (6 ) 429,024 Auction rate securities 10,500 — (389 ) 10,111 10,500 — (188 ) 10,312 Municipal bonds 65,920 577 (302 ) 66,195 49,064 744 (152 ) 49,656 U.S. government and agency securities 298,492 21 (196 ) 298,317 757,954 91 (129 ) 757,916 Foreign government and agency securities 136,384 — (9 ) 136,375 197,932 — — 197,932 Mortgage-backed securities 1,138,412 6,504 (10,768 ) 1,134,148 1,035,598 8,809 (4,171 ) 1,040,236 Asset-backed securities 213,908 635 (876 ) 213,667 211,487 1,130 (159 ) 212,458 Debt mutual funds 101,350 — (13,233 ) 88,117 101,350 — (6,150 ) 95,200 Bank loans 102,724 31 (103 ) 102,652 98,131 29 (60 ) 98,100 Commercial mortgage- backed securities 193,033 26 (2,658 ) 190,401 40,132 133 (325 ) 39,940 $ 3,485,537 $ 7,832 $ (29,341 ) $ 3,464,028 $ 3,471,735 $ 10,961 $ (11,340 ) $ 3,471,356 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 January 2, 2016 and March 28, 2015 : January 2, 2016 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 $ 113,246 $ (807 ) $ — $ — $ 113,246 $ (807 ) Auction rate securities — — 10,111 (389 ) 10,111 (389 ) Municipal bonds 24,009 (148 ) 3,408 (154 ) 27,417 (302 ) U.S. government and agency securities 167,906 (196 ) — — 167,906 (196 ) Foreign government and agency securities 9,986 (9 ) — — 9,986 (9 ) Mortgage-backed securities 822,404 (9,365 ) 55,649 (1,403 ) 878,053 (10,768 ) Asset-backed securities 154,782 (749 ) 25,470 (127 ) 180,252 (876 ) Debt mutual funds 17,628 (2,372 ) 70,489 (10,861 ) 88,117 (13,233 ) Bank loans 41,534 (64 ) 31,080 (39 ) 72,614 (103 ) Commercial mortgage- backed securities 182,372 (2,038 ) 1,512 (620 ) 183,884 (2,658 ) $ 1,533,867 $ (15,748 ) $ 197,719 $ (13,593 ) $ 1,731,586 $ (29,341 ) March 28, 2015 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 $ 7,190 $ (6 ) $ — $ — $ 7,190 $ (6 ) Auction rate securities — — 10,312 (188 ) 10,312 (188 ) Municipal bonds 10,014 (94 ) 1,931 (58 ) 11,945 (152 ) U.S. government and agency securities 451,296 (129 ) — — 451,296 (129 ) Mortgage-backed securities 442,786 (2,901 ) 48,263 (1,270 ) 491,049 (4,171 ) Asset-backed securities 75,009 (159 ) — — 75,009 (159 ) Debt mutual funds 38,608 (1,392 ) 56,592 (4,758 ) 95,200 (6,150 ) Bank loans 65,085 (60 ) — — 65,085 (60 ) Commercial mortgage- backed securities 5,984 (268 ) 944 (57 ) 6,928 (325 ) $ 1,095,972 $ (5,009 ) $ 118,042 $ (6,331 ) $ 1,214,014 $ (11,340 ) As of January 2, 2016 , the gross unrealized losses that had been outstanding for less than twelve months were primarily related to mortgage-backed securities, debt mutual funds and commercial mortgage-backed securities due to the general rising of the interest-rate environment and foreign currency movement. The gross unrealized losses that had been outstanding for more than twelve months were primarily related to debt mutual funds and mortgage-backed securities, which were primarily due to the same reasons stated above. The percentage of the losses to the total estimated fair value of the Company's investments was insignificant. The Company reviewed the investment portfolio and determined that the gross unrealized losses on these investments as of January 2, 2016 and March 28, 2015 were temporary in nature as evidenced by the fluctuations in the gross unrealized losses within the investment categories. These investments are highly rated by the credit rating agencies and there have been no defaults on any of these securities, and we have received interest payments as they become due. Additionally, in the past several years a portion of the Company's investment in the mortgage-backed securities were 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 January 2, 2016 and March 28, 2015 . 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 Company also believes that it will be able to collect both principal and interest amounts due to the Company at maturity, given the high credit quality of these investments and any related underlying collateral. The amortized cost and estimated fair value of marketable debt securities (financial institution securities, non-financial institution securities, auction rate securities, municipal bonds, U.S. and foreign government and agency securities, mortgage-backed securities, asset-backed securities, bank loans and commercial mortgage-backed securities), by contractual maturity, are shown below. Actual maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations without call or prepayment penalties. January 2, 2016 (In thousands) Amortized Estimated Due in one year or less $ 1,232,756 $ 1,232,713 Due after one year through five years 503,374 501,371 Due after five years through ten years 272,546 271,353 Due after ten years 1,153,078 1,148,041 $ 3,161,754 $ 3,153,478 As of January 2, 2016 , $1.78 billion of marketable debt securities with contractual maturities of greater than one year were classified as short-term investments. Additionally, the above table did not include investments in money market and mutual funds because these funds do not have specific contractual maturities. Certain information related to available-for-sale securities is as follows: Three Months Ended Nine Months Ended (In thousands) January 2, 2016 December 27, 2014 January 2, 2016 December 27, 2014 Proceeds from sale of available-for-sale securities $ 82,396 $ 478,562 $ 203,426 $ 774,406 Gross realized gains on sale of available-for-sale securities $ 203 $ 4,759 $ 1,038 $ 7,838 Gross realized losses on sale of available-for-sale securities (221 ) (1,663 ) (439 ) (2,330 ) Net realized gains (losses) on sale of available-for-sale securities $ (18 ) $ 3,096 $ 599 $ 5,508 Amortization of premiums on available-for-sale securities $ 6,906 $ 5,913 $ 20,417 $ 18,559 The cost of securities matured or sold is based on the specific identification method.

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Jan. 02, 2016
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. As of January 2, 2016 and March 28, 2015 , the Company had the following outstanding forward currency exchange contracts (in notional amount), which were derivative financial instruments: (In thousands and U.S. dollars) January 2, 2016 March 28, 2015 Singapore Dollar $ 26,620 $ 43,901 Euro 18,262 29,973 Indian Rupee 22,754 22,228 British Pound 11,749 12,946 Japanese Yen 3,338 4,994 $ 82,723 $ 114,042 As part of the Company’s strategy to reduce volatility of operating expenses due to foreign exchange rate fluctuations, the Company employs a hedging program with a forward outlook of up to two years for major foreign-currency-denominated operating expenses. The outstanding forward currency exchange contracts expire at various dates through February 2017 . The majority of net unrealized losses, which approximate the fair market value of the outstanding forward currency exchange contracts, are expected to be realized into net income within the next twelve months . As of January 2, 2016 , all of the forward foreign currency exchange contracts were designated and qualified as cash flow hedges and the effective portion of the gain or loss on the forward contracts was reported as a component of other comprehensive income (loss) and reclassified into net income in the same period during which the hedged transaction affects earnings. The estimated amount of such gains or losses as of January 2, 2016 that is expected to be reclassified into earnings was not material. The ineffective portion of the gains or losses on the forward contracts was included in the net income for all periods presented. The Company may enter into forward foreign currency exchange contracts to hedge firm commitments such as acquisitions and capital expenditures. Gains and losses on foreign currency forward contracts that are designated as hedges of anticipated transactions, for which a firm commitment has been attained and the hedged relationship has been effective, are deferred and included in income or expenses in the same period that the underlying transaction is settled. Gains and losses on any instruments not meeting the above criteria are recognized in income or expenses in the consolidated statements of income as they are incurred. The Company had the following derivative instruments as of January 2, 2016 and March 28, 2015 , located on the condensed consolidated balance sheet, utilized for risk management purposes detailed above: Foreign Exchange Contracts Asset Derivatives Liability Derivatives (In thousands) Balance Sheet Location Fair Value Balance Sheet Location Fair Value January 2, 2016 Prepaid expenses and other current assets $ 446 Other accrued liabilities $ 3,084 March 28, 2015 Prepaid expenses and other current assets $ — Other accrued liabilities $ 9,320 The Company does not offset or net the fair value amounts of derivative financial instruments in its condensed consolidated balance sheets. The potential effect of rights of set-off associated with the derivative financial instruments was not material to the Company's condensed consolidated balance sheet for all periods presented. The following table summarizes the effect of derivative instruments on the condensed consolidated statements of income for the third quarter and the first nine months of fiscal 2016 and 2015 : Three Months Ended Nine Months Ended (In thousands) January 2, 2016 December 27, 2014 January 2, 2016 December 27, 2014 Amount of losses recognized in other comprehensive income on derivative (effective portion of cash flow hedging) $ (1,470 ) $ (2,110 ) $ (5,035 ) $ (6,189 ) Amount of losses reclassified from accumulated other comprehensive income into income (effective portion) * $ (2,166 ) $ (1,786 ) $ (6,110 ) $ (768 ) Amount of gains (losses) recorded (ineffective portion) * $ 7 $ (3 ) $ (15 ) $ (16 ) * Recorded in Interest and Other Expense location within the condensed consolidated statements of income.

Stock-Based Compensation Plans

Stock-Based Compensation Plans	9 Months Ended
	Jan. 02, 2016
Disclosure of Compensation Related Costs, Share-based Payments [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 Nine Months Ended (In thousands) January 2, 2016 December 27, 2014 January 2, 2016 December 27, 2014 Stock-based compensation included in: Cost of revenues $ 2,145 $ 2,339 $ 5,872 $ 6,408 Research and development 16,935 14,909 44,561 40,245 Selling, general and administrative 12,383 11,806 34,031 33,247 $ 31,463 $ 29,054 $ 84,464 $ 79,900 During the first nine months of fiscal 2016 and 2015 , the tax benefits realized for the tax deduction from option exercises and other awards credited to additional paid-in capital were $8.5 million and $12.3 million , respectively. Employee Stock Option Plans A summary of the Company’s option plans activity and related information is as follows: Options Outstanding (Shares in thousands) Number of Shares Weighted-Average Exercise Price Per Share March 29, 2014 5,280 $ 25.22 Exercised (2,009 ) $ 25.80 Forfeited/cancelled/expired (24 ) $ 32.22 March 28, 2015 3,247 $ 24.81 Exercised (1,503 ) $ 24.43 Forfeited/cancelled/expired (12 ) $ 31.99 January 2, 2016 1,732 $ 25.09 Options exercisable at: January 2, 2016 1,705 $ 24.96 March 28, 2015 3,173 $ 24.59 The types of awards allowed under the 2007 Equity Incentive Plan (2007 Equity Plan) include incentive stock options, non-qualified stock options, restricted stock unit (RSU) awards, 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. As of January 2, 2016 , 13.0 million shares remained available for grant under the 2007 Equity Plan. The total pre-tax intrinsic value of options exercised during the three and nine months ended January 2, 2016 was $8.3 million and $31.6 million , respectively. The total pre-tax intrinsic value of options exercised during the three and nine months ended December 27, 2014 was $11.7 million and $27.7 million , respectively. This intrinsic value represents the difference between the exercise price and the fair market value of the Company’s common stock on the date of exercise. The Company's stock-based compensation expense relating to options during the first nine months of fiscal 2016 and 2015 was not material. 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 29, 2014 6,901 $ 35.08 Granted 3,201 $ 43.11 Vested (2,698 ) $ 33.82 Cancelled (531 ) $ 32.91 March 28, 2015 6,873 $ 39.07 Granted 2,889 $ 41.24 Vested (2,287 ) $ 37.16 Cancelled (517 ) $ 39.77 January 2, 2016 6,958 $ 40.54 The estimated fair values of RSU awards 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 third quarter of fiscal 2016 was $43.41 ( $40.76 for the third quarter of fiscal 2015 ), and for the first nine months of fiscal 2016 was $41.24 ( $43.76 for the first nine months of fiscal 2015 ), which were calculated based on estimates at the date of grant using the following weighted-average assumptions: Three Months Ended Nine Months Ended January 2, 2016 December 27, 2014 January 2, 2016 December 27, 2014 Risk-free interest rate 1.3 % 1.3 % 1.3 % 0.7 % Dividend yield 2.7 % 2.7 % 2.8 % 2.4 % 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 we pay in cash to the appropriate taxing authorities on behalf of our employees. In the condensed consolidated statement of cash flows, these amounts have been included as a reduction in the cash proceeds from issuance of common stock under our various stock plans. During the first nine months of fiscal 2016 and 2015 , we withheld $29.8 million and $33.2 million worth of RSU awards, respectively, to satisfy the employees’ tax obligations. Employee Stock Purchase Plan Under the ESPP, shares are only issued during the second and fourth quarters of each fiscal year. Employees purchased 438 thousand shares for $14.5 million during the second quarter of fiscal 2016 and 446 thousand shares for $14.9 million in the second quarter of fiscal 2015 . The per-share weighted-average fair value of stock purchase rights granted under the ESPP during the second quarter of fiscal 2016 and 2015 was $9.78 and $9.75 , respectively. The fair values of stock purchase plan rights granted in the second quarter of fiscal 2016 and 2015 were estimated using the Black-Scholes option pricing model at the date of grant using the following assumptions: 2016 2015 Expected life of options (years) 1.25 1.25 Expected stock price volatility 0.25 0.25 Risk-free interest rate 0.4 % 0.2 % Dividend yield 3.0 % 2.8 % The next scheduled purchase under the ESPP is in the fourth quarter of fiscal 2016. As of January 2, 2016 , 10.1 million shares were available for future issuance under the ESPP.

Net Income Per Common Share

Net Income Per Common Share	9 Months Ended
	Jan. 02, 2016
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 the information on the condensed consolidated statements of income, and there are no reconciling items in the numerator used to compute diluted net income per common share. The following table summarizes the computation of basic and diluted net income per common share: Three Months Ended Nine Months Ended (In thousands, except per share amounts) January 2, 2016 December 27, 2014 January 2, 2016 December 27, 2014 Net income available to common stockholders $ 130,819 $ 168,466 $ 405,833 $ 513,593 Weighted average common shares outstanding-basic 256,450 262,881 257,491 266,299 Dilutive effect of employee equity incentive plans 2,538 3,138 2,416 3,463 Dilutive effect of 2017 Convertible Notes and warrants 10,623 7,776 8,809 7,947 Weighted average common shares outstanding-diluted 269,611 273,795 268,716 277,709 Basic earnings per common share $ 0.51 $ 0.64 $ 1.58 $ 1.93 Diluted earnings per common share $ 0.49 $ 0.62 $ 1.51 $ 1.85 The total shares used in the denominator of the diluted net income per common share calculation includes potentially dilutive common equivalent shares outstanding that are not included in basic net income per common share by applying the treasury stock method to the impact of the equity incentive plans and to the incremental shares issuable assuming conversion of the Company's convertible debt and warrants (see "Note 10. Debt and Credit Facility" for more discussion of the Company's debt and warrants). Outstanding stock options and RSUs under the Company's stock award plans to purchase approximately 222 thousand and 3.7 million shares, for the third quarter and the first nine months of fiscal 2016 , respectively, were excluded from diluted net income per common share by applying the treasury stock method, as their inclusion would have been anti-dilutive. These options and RSUs 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. To hedge against potential dilution upon conversion of the 2017 Convertible Notes, the Company also purchased call options on its common stock from the hedge counter-parties. The call options give the Company the right to purchase up to 20.5 million shares of its common stock at $29.26 per share. These call options are not considered for purposes of calculating the total shares outstanding under the basic and diluted net income per share, as their effect would be anti-dilutive. Upon exercise, the call options would serve to neutralize the dilutive effect of the 2017 Convertible Notes and potentially reduce the weighted number of diluted shares used in per share calculations.

Inventories

Inventories	9 Months Ended
	Jan. 02, 2016
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 NRV) and are comprised of the following: (In thousands) January 2, 2016 March 28, 2015 Raw materials $ 13,707 $ 14,174 Work-in-process 141,529 183,472 Finished goods 40,733 33,682 $ 195,969 $ 231,328

Debt and Credit Facility

Debt and Credit Facility	9 Months Ended
	Jan. 02, 2016
Debt Disclosure [Abstract]
Debt and Credit Facility [Text Block]	Debt and Credit Facility 2017 Convertible Notes As of January 2, 2016 , the Company had $600.0 million principal amount of 2017 Convertible Notes outstanding. The 2017 Convertible Notes are senior in right of payment to the Company’s existing and future unsecured indebtedness that is expressly subordinated in right of payment to the 2017 Convertible Notes, and are ranked equally with all of our other existing and future unsecured senior indebtedness, including the 2019 and 2021 Notes discussed below. The Company may not redeem the 2017 Convertible Notes prior to maturity. The 2017 Convertible Notes are convertible, subject to certain conditions, into shares of Xilinx common stock at a conversion rate of 34.1754 shares of common stock per $1 thousand principal amount of the 2017 Convertible Notes, representing an effective conversion price of approximately $29.26 per share of common stock. The conversion rate is subject to adjustment for certain events as outlined in the indenture governing the 2017 Convertible Notes, but will not be adjusted for accrued interest. One of the conditions allowing holders of the 2017 Convertible Notes to convert during any fiscal quarter is if the last reported sale price of the Company's common stock for at least 20 trading days during a period of 30 consecutive trading days ending on the last trading day of the preceding fiscal quarter is greater than or equal to 130% of the conversion price on each applicable trading day. This condition was met as of January 2, 2016 and as a result, the 2017 Convertible Notes were convertible at the option of the holders. As of January 2, 2016 , the 2017 Convertible Notes were classified as a current liability on the Company's condensed consolidated balance sheet. Additionally, a portion of the equity component attributable to the conversion feature of the 2017 Convertible Notes was classified in temporary stockholders' equity. The amount classified as temporary equity was equal to the difference between the principal amount and carrying value of the 2017 Convertible Notes. Upon conversion, the Company would pay the holders of the 2017 Convertible Notes cash up to the aggregate principal amount of the 2017 Convertible Notes. If the conversion value exceeds the principal amount, the Company would deliver shares of its common stock in respect to the remainder of its conversion obligation in excess of the aggregate principal amount (conversion spread). Accordingly, there is no adjustment to the numerator in the net income per common share computation for the cash settled portion of the 2017 Convertible Notes, as that portion of the debt liability will always be settled in cash. The conversion spread is included in the denominator for the computation of diluted net income per common share, using the treasury stock method. The carrying values of the liability and equity components of the 2017 Convertible Notes are reflected in the Company’s condensed consolidated balance sheets as follows: (In thousands) January 2, 2016 March 28, 2015 Liability component: Principal amount of the 2017 Convertible Notes $ 600,000 $ 600,000 Unamortized discount of liability component (22,021 ) (33,679 ) Hedge accounting adjustment – sale of interest rate swap 6,364 9,732 Net carrying value of the 2017 Convertible Notes $ 584,343 $ 576,053 Equity component (including temporary equity) – net carrying value $ 66,415 $ 66,415 The remaining unamortized debt discount, net of the hedge accounting adjustment from the previous sale of the interest rate swap, is being amortized as additional non-cash interest expense over the expected remaining term of the 2017 Convertible Notes. As of January 2, 2016 , the remaining term of the 2017 Convertible Notes is 1.5 years. As of January 2, 2016 , the if-converted value of the 2017 Convertible Notes was $990.8 million . Interest expense related to the 2017 Convertible Notes was included in interest and other expense, net on the condensed consolidated statements of income as follows: Three Months Ended Nine Months Ended (In thousands) January 2, 2016 December 27, 2014 January 2, 2016 December 27, 2014 Contractual coupon interest $ 3,938 $ 3,938 $ 11,813 $ 11,813 Amortization of debt issuance costs 362 362 1,086 1,086 Amortization of debt discount, net 2,763 2,763 8,289 8,289 Total interest expense related to the 2017 Convertible Notes $ 7,063 $ 7,063 $ 21,188 $ 21,188 To hedge against potential dilution upon conversion of the 2017 Convertible Notes, the Company purchased call options on its common stock from the hedge counter parties. The call options give the Company the right to purchase up to 20.5 million shares of its common stock at $29.26 per share. The call options will terminate upon the earlier of the maturity of the 2017 Convertible Notes or the last day any of the 2017 Convertible Notes remain outstanding. To reduce the hedging cost, under separate transactions the Company sold warrants to the hedge counter parties, which give the hedge counter parties the right to purchase up to 20.5 million shares of the Company’s common stock at $41.45 per share. These warrants expire on a gradual basis over a specified period starting on September 13, 2017. 2019 and 2021 Notes On March 12, 2014, the Company issued $500.0 million principal amount of 2019 Notes and $500.0 million principal amount of 2021 Notes with maturity dates of March 15, 2019 and March 15, 2021 respectively. The 2019 and 2021 Notes were offered to the public at a discounted price of 99.477% and 99.281% of par, respectively. Interest on the 2019 and 2021 Notes is payable semiannually on March 15 and September 15. The Company received net proceeds of $990.1 million from issuance of the 2019 and 2021 Notes, after the debt discounts and deduction of debt issuance costs. The debt discounts and issuance costs are amortized to interest expense over the terms of the 2019 and 2021 Notes. The following table summarizes the carrying value of the 2019 and 2021 Notes as of January 2, 2016 and March 28, 2015 : (In thousands) January 2, 2016 March 28, 2015 Principal amount of the 2019 Notes $ 500,000 $ 500,000 Unamortized discount of the 2019 Notes (1,689 ) (2,073 ) Principal amount of the 2021 Notes 500,000 500,000 Unamortized discount of the 2021 Notes (2,727 ) (3,088 ) Total carrying value $ 995,584 $ 994,839 Interest expense related to the 2019 and 2021 Notes was included in interest and other expense, net on the condensed consolidated statements of income as follows: Three Months Ended Nine Months Ended (In thousands) January 2, 2016 December 27, 2014 January 2, 2016 December 27, 2014 Contractual coupon interest $ 6,406 $ 6,406 $ 19,219 $ 19,219 Amortization of debt issuance costs 146 146 439 436 Amortization of debt discount, net 251 244 745 725 Total interest expense related to the 2019 and 2021 Notes $ 6,803 $ 6,796 $ 20,403 $ 20,380 Revolving Credit Facility On December 7, 2011 , the Company entered into a $250.0 million senior unsecured revolving credit facility with a syndicate of banks (expiring in December 2016 ). 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 January 2, 2016 , 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	9 Months Ended
	Jan. 02, 2016
Common Stock Repurchase Program [Abstract]
Common Stock and Debentures Repurchase Program [Text Block]	Common Stock Repurchase Program The Board of Directors 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. In November 2014, the Board authorized the repurchase of $800.0 million of the Company's common stock (2014 Repurchase Program). The 2014 Repurchase Program has no stated expiration date. Through January 2, 2016 , the Company had used $452.6 million of the $800.0 million authorized under the 2014 Repurchase Program, leaving $347.4 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 January 2, 2016 and March 28, 2015 . During the first nine months of fiscal 2016 , the Company repurchased 6.7 million shares of common stock in the open market for a total of $300.0 million . During the first nine months of fiscal 2015 , the Company repurchased 11.0 million shares of common stock in the open market for a total of $475.0 million .

Interest and Other Expense, Net

Interest and Other Expense, Net	9 Months Ended
	Jan. 02, 2016
Other Income and Expenses [Abstract]
Interest and Other Expense, Net	Interest and Other Expense, Net The components of interest and other expense, net are as follows: Three Months Ended Nine Months Ended (In thousands) January 2, 2016 December 27, 2014 January 2, 2016 December 27, 2014 Interest income $ 12,640 $ 11,375 $ 28,739 $ 28,268 Interest expense (13,866 ) (13,859 ) (41,591 ) (41,567 ) Other expense, net (3,827 ) (1,523 ) (11,941 ) (2,661 ) $ (5,053 ) $ (4,007 ) $ (24,793 ) $ (15,960 )

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	9 Months Ended
	Jan. 02, 2016
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 accumulated other comprehensive loss are as follows: (In thousands) January 2, 2016 March 28, 2015 Accumulated unrealized losses on available-for-sale securities, net of tax $ (13,517 ) $ (238 ) Accumulated unrealized losses on hedging transactions, net of tax (2,487 ) (7,523 ) Accumulated cumulative translation adjustment, net of tax (5,385 ) (3,388 ) Accumulated other comprehensive loss $ (21,389 ) $ (11,149 ) The related tax effects of other comprehensive loss were not material for all periods presented.

Income Taxes

Income Taxes	9 Months Ended
	Jan. 02, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company recorded tax provisions of $24.2 million and $61.2 million for the third quarter and the first nine months of fiscal 2016 , respectively, representing an effective tax rate of 16% and 13% , respectively. The Company recorded tax provisions of $17.5 million and $67.0 million for the third quarter and the first nine months of fiscal 2015 , respectively, representing effective tax rates of 9% and 12% , respectively. The difference between the U.S. federal statutory tax rate of 35% and the Company’s effective tax rate in all periods is primarily due to income earned in lower tax rate jurisdictions, for which no U.S. income tax has been provided, as the Company intends to permanently reinvest these earnings outside of the U.S. The Company’s total gross unrecognized tax benefits as of January 2, 2016 , determined in accordance with FASB authoritative guidance for measuring uncertain tax positions, increased by $2.4 million in the third quarter of fiscal 2016 to $32.4 million . The total amount of unrecognized tax benefits that, if realized in a future period, would favorably affect the effective tax rate was $14.8 million as of January 2, 2016 . It is reasonably possible that changes to our 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 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 for income taxes were not material for all periods presented. The Company is no longer subject to U.S. federal audits by taxing authorities for years through fiscal 2011. The Company is no longer subject to U.S. state audits for years through fiscal 2010. The Company is no longer subject to tax audits in Ireland for years through fiscal 2011. The Company is currently under examination by the IRS for fiscal years 2012 through 2014. The Company believes that its allowances for income tax contingencies are adequate and does not anticipate a significant change in its income tax contingencies as a result of the IRS audit.

Commitments

Commitments	9 Months Ended
	Jan. 02, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments	Commitments Xilinx leases some of its facilities and office buildings under non-cancelable operating leases that expire at various dates through October 2021 . 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. Approximate future minimum lease payments under non-cancelable operating leases are as follows: Fiscal (In thousands) 2016 (remaining three months) $ 1,220 2017 4,268 2018 3,061 2019 2,812 2020 2,000 Thereafter 2,210 Total $ 15,571 Aggregate future rental income to be received from owned property, totaled $2.7 million as of January 2, 2016 . Rent expense, net of rental income, under all operating leases was $1.2 million and $3.3 million for the three and nine months ended January 2, 2016 , respectively. Rent expense, net of rental income, under all operating leases was $792 thousand and $2.4 million for the three and nine months ended December 27, 2014 , respectively. Rental income was not material for the third quarter and the first nine months of fiscal 2016 and 2015 . Other commitments as of January 2, 2016 totaled $95.5 million and consisted of purchases of inventory and other non-cancelable purchase obligations related to subcontractors that manufacture silicon wafers and provide assembly and 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. As of January 2, 2016 , the Company had $49.4 million of non-cancelable license obligations to providers of electronic design automation software and hardware/software maintenance expiring at various dates through December 2018 . As of January 2, 2016 , the Company also had open purchase obligations totaling $24.4 million related to the renovation of one of its properties.

Product Warranty and Indemnific

Product Warranty and Indemnification	9 Months Ended
	Jan. 02, 2016
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 third quarter of fiscal 2016 and the end of fiscal 2015 , the accrual balance of the product warranty liability was 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 our 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	9 Months Ended
	Jan. 02, 2016
Loss Contingency [Abstract]
Contingencies	Contingencies Patent Litigation On November 7, 2014, the Company filed a complaint for declaratory judgment against Papst Licensing GmbH & Co., KG (Papst) in the U.S. District Court for the Northern District of California (Xilinx, Inc. v. Papst Licensing GmbH & Co., KG, Case No. 3:14-CV-04963) (the California Action). On the same date, a patent infringement lawsuit was filed by Papst against the Company in the U.S. District Court for the District of Delaware (Papst Licensing GmbH & Co., KG v. Xilinx, Inc., Case No. 1:14-CV-01376) (the Delaware Action). Both the California Action and the Delaware Action pertain to the same two patents. In the Delaware Action, Papst seeks unspecified damages, interest and costs. On July 9, 2015, the Court in the California Action granted Papst’s motion to dismiss for lack of personal jurisdiction and the California Action was dismissed. The Company has filed its opening brief, accompanied by three amicus briefs supported by industry and academia, in its appeal of the dismissal of the California Action to the U.S. Court of Appeals for the Federal Circuit. On September 1, 2015, the Court in the Delaware Action granted the Company’s motion to transfer the Delaware Action to the U.S. District Court for the Northern District of California. Papst has filed an objection to that order. The Company is unable to estimate its range of possible loss, if any, in this matter at this time. On July 17, 2014, a patent infringement lawsuit was filed by PLL Technologies, Inc. (PTI) against the Company in the U.S. District Court for the District of Delaware (PLL Technologies, Inc. v. Xilinx, Inc., Case No. 1:14-CV-00945). On April 28, 2015, the United States Patent Trial and Appeal Board (PTAB) granted Xilinx’s request for inter partes review (IPR) with respect to all claims in the litigation. An oral hearing in the IPR was held before the PTAB on January 26, 2016. On May 5, 2015, the Court ordered the litigation be stayed pending final resolution of the IPR. The lawsuit pertains to one patent and PTI seeks unspecified damages, interest and costs. The Company is unable to estimate its range of possible loss, if any, in this matter at this time. On May 22, 2015, a patent infringement lawsuit was filed by QuickCompile IP, LLC (QuickCompile) against the Company in the U.S. District Court for the Eastern District of Texas (QuickCompile IP, LLC v. Xilinx, Inc., Case No. 2:15-CV-00820). The lawsuit pertains to two patents and QuickCompile seeks unspecified damages, interest and costs. The Company is unable to estimate its range of possible loss, if any, in this matter at this time. The Company intends to continue to protect and defend our Intellectual Property (IP) vigorously. 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. The Court has not yet adjudicated either motion. The Company is unable to estimate its range of possible loss, if any, in this matter at this time. 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	9 Months Ended
	Jan. 02, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Acquisition-Related Intangibles	Goodwill and Acquisition-Related Intangibles As of January 2, 2016 and March 28, 2015 , the gross and net amounts of goodwill and of acquisition-related intangibles for all acquisitions were as follows: Weighted-Average (In thousands) January 2, 2016 March 28, 2015 Amortization Life Goodwill $ 159,296 $ 159,296 Core technology, gross 77,640 77,640 5.6 years Less accumulated amortization (70,244 ) (64,988 ) Core technology, net 7,396 12,652 Other intangibles, gross 46,606 46,606 2.7 years Less accumulated amortization (46,556 ) (46,506 ) Other intangibles, net 50 100 Total acquisition-related intangibles, gross 124,246 124,246 Less accumulated amortization (116,800 ) (111,494 ) Total acquisition-related intangibles, net $ 7,446 $ 12,752 Amortization expense for acquisition-related intangibles for the three and nine months ended January 2, 2016 was $1.8 million and $5.3 million , respectively. Based on the carrying value of acquisition-related intangibles recorded as of January 2, 2016 , and assuming no subsequent impairment of the underlying assets, the annual amortization expense for acquisition-related intangibles is expected to be as follows: Fiscal (In thousands) 2016 (remaining three months) $ 1,244 2017 4,761 2018 1,374 2019 67 Total $ 7,446

Subsequent Events (Notes)

Subsequent Events (Notes)	9 Months Ended
	Jan. 02, 2016
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Subsequent Events On January 19, 2016 , the Company’s Board of Directors declared a cash dividend of $0.31 per common share for the fourth quarter of fiscal 2016 . The dividend is payable on March 16, 2016 to stockholders of record on March 2, 2016 .

Restructuring Charges (Notes)

Restructuring Charges (Notes)	9 Months Ended
	Jan. 02, 2016
Restructuring and Related Activities [Abstract]
Restructuring and Related Activities Disclosure [Text Block]	Restructuring Charges During the fourth quarter of fiscal 2015, the Company announced restructuring measures designed to realign resources and drive overall operating efficiencies. These measures impacted approximately 120 positions, or 3% of the Company's global workforce, in various geographies and functions worldwide. The reorganization plan was substantially completed by the end of the first quarter of fiscal 2016. The Company recorded total restructuring charges of $24.5 million in the fourth quarter of fiscal 2015, primarily related to severance pay expenses and write-offs of acquisition-related intangibles. As of the end of the third quarter of fiscal 2016 , the balance of the restructuring accrual was $3.0 million , which is expected to be paid within the next few quarters.

Derivative Financial Instrume27

Derivative Financial Instruments Derivative Financial Instruments (Policies)	9 Months Ended
	Jan. 02, 2016
Accounting Policies [Abstract]
Derivatives, Policy [Policy Text Block]	Gains and losses on foreign currency forward contracts that are designated as hedges of anticipated transactions, for which a firm commitment has been attained and the hedged relationship has been effective, are deferred and included in income or expenses in the same period that the underlying transaction is settled. Gains and losses on any instruments not meeting the above criteria are recognized in income or expenses in the consolidated statements of income as they are incurred.

Stock-Based Compensation Plans

Stock-Based Compensation Plans (Policies)	9 Months Ended
	Jan. 02, 2016
Accounting Policies [Abstract]
Share based compensation, Restricted Stock and Restricted Stock Units Policy [Policy Text Block]	The estimated fair values of RSU awards 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.

Inventories Inventories (Polici

Inventories Inventories (Policies)	9 Months Ended
	Jan. 02, 2016
Inventory Disclosure [Abstract]
Inventory, Policy [Policy Text Block]	Inventories are stated at the lower of actual cost (determined using the first-in, first-out method), or market (estimated NRV)

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Jan. 02, 2016
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 January 2, 2016 and March 28, 2015 : January 2, 2016 (In thousands) Quoted Significant Significant Total Fair Assets Cash equivalents: Money market funds $ 222,433 $ — $ — $ 222,433 Financial institution securities — 63,995 — 63,995 Non-financial institution securities — 319,224 — 319,224 U.S. government and agency securities 25,007 55,486 — 80,493 Foreign government and agency securities — 54,997 — 54,997 Short-term investments: Financial institution securities — 264,950 — 264,950 Non-financial institution securities — 353,443 — 353,443 Municipal bonds — 59,019 — 59,019 U.S. government and agency securities 102,967 114,857 — 217,824 Foreign government and agency securities — 81,378 — 81,378 Asset-backed securities — 206,793 — 206,793 Mortgage-backed securities — 987,110 — 987,110 Debt mutual funds — 34,883 — 34,883 Bank loans — 102,652 — 102,652 Commercial mortgage-backed securities — 190,220 — 190,220 Long-term investments: Auction rate securities — — 10,111 10,111 Asset-backed securities — 6,874 — 6,874 Municipal bonds — 7,176 — 7,176 Mortgage-backed securities — 147,038 — 147,038 Debt mutual fund — 53,234 — 53,234 Commercial mortgage-backed securities — 181 — 181 Total assets measured at fair value $ 350,407 $ 3,103,510 $ 10,111 $ 3,464,028 Liabilities Derivative financial instruments, net $ — $ 2,638 $ — $ 2,638 Total liabilities measured at fair value $ — $ 2,638 $ — $ 2,638 Net assets measured at fair value $ 350,407 $ 3,100,872 $ 10,111 $ 3,461,390 March 28, 2015 (In thousands) Quoted Significant Significant Total Fair Assets Cash equivalents: Money market funds $ 235,583 $ — $ — $ 235,583 Financial institution securities — 229,999 — 229,999 Non-financial institution securities — 89,995 — 89,995 U.S. government and agency securities — 200,392 — 200,392 Foreign government and agency securities — 37,996 — 37,996 Short-term investments: Financial institution securities — 75,000 — 75,000 Non-financial institution securities — 339,029 — 339,029 Municipal Bonds — 40,006 — 40,006 U.S. government and agency securities 256,514 301,010 — 557,524 Foreign government and agency securities — 159,936 — 159,936 Mortgage-backed securities — 859,330 — 859,330 Debt mutual fund — 38,608 — 38,608 Bank loans — 98,100 — 98,100 Asset-backed securities — 204,510 — 204,510 Commercial mortgage-backed securities — 38,446 — 38,446 Long-term investments: Auction rate securities — — 10,312 10,312 Municipal bonds — 9,650 — 9,650 Mortgage-backed securities — 180,906 — 180,906 Debt mutual fund — 56,592 — 56,592 Asset-backed securities — 7,948 — 7,948 Commercial mortgage-backed securities — 1,494 — 1,494 Total assets measured at fair value $ 492,097 $ 2,968,947 $ 10,312 $ 3,471,356 Liabilities Derivative financial instruments, net $ — $ 9,251 $ — $ 9,251 Total liabilities measured at fair value $ — $ 9,251 $ — $ 9,251 Net assets measured at fair value $ 492,097 $ 2,959,696 $ 10,312 $ 3,462,105
Changes in Level 3 instruments measured at fair value on a recurring basis	The following table is a reconciliation of all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3): Three Months Ended Nine Months Ended (In thousands) January 2, 2016 December 27, 2014 January 2, 2016 December 27, 2014 Balance as of beginning of period $ 10,413 $ 20,608 $ 10,312 $ 20,160 Total realized and unrealized gains (losses): Included in other comprehensive income (loss) (302 ) 717 (201 ) 1,165 Sales and settlements, net (1) — (11,000 ) — (11,000 ) Balance as of end of period $ 10,111 $ 10,325 $ 10,111 $ 10,325

Financial Instruments (Tables)

Financial Instruments (Tables)	9 Months Ended
	Jan. 02, 2016
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: January 2, 2016 March 28, 2015 (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 $ 222,433 $ — $ — $ 222,433 $ 235,583 $ — $ — $ 235,583 Financial institution securities 328,945 — — 328,945 304,999 — — 304,999 Non-financial institution securities 673,436 38 (807 ) 672,667 429,005 25 (6 ) 429,024 Auction rate securities 10,500 — (389 ) 10,111 10,500 — (188 ) 10,312 Municipal bonds 65,920 577 (302 ) 66,195 49,064 744 (152 ) 49,656 U.S. government and agency securities 298,492 21 (196 ) 298,317 757,954 91 (129 ) 757,916 Foreign government and agency securities 136,384 — (9 ) 136,375 197,932 — — 197,932 Mortgage-backed securities 1,138,412 6,504 (10,768 ) 1,134,148 1,035,598 8,809 (4,171 ) 1,040,236 Asset-backed securities 213,908 635 (876 ) 213,667 211,487 1,130 (159 ) 212,458 Debt mutual funds 101,350 — (13,233 ) 88,117 101,350 — (6,150 ) 95,200 Bank loans 102,724 31 (103 ) 102,652 98,131 29 (60 ) 98,100 Commercial mortgage- backed securities 193,033 26 (2,658 ) 190,401 40,132 133 (325 ) 39,940 $ 3,485,537 $ 7,832 $ (29,341 ) $ 3,464,028 $ 3,471,735 $ 10,961 $ (11,340 ) $ 3,471,356
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 January 2, 2016 and March 28, 2015 : January 2, 2016 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 $ 113,246 $ (807 ) $ — $ — $ 113,246 $ (807 ) Auction rate securities — — 10,111 (389 ) 10,111 (389 ) Municipal bonds 24,009 (148 ) 3,408 (154 ) 27,417 (302 ) U.S. government and agency securities 167,906 (196 ) — — 167,906 (196 ) Foreign government and agency securities 9,986 (9 ) — — 9,986 (9 ) Mortgage-backed securities 822,404 (9,365 ) 55,649 (1,403 ) 878,053 (10,768 ) Asset-backed securities 154,782 (749 ) 25,470 (127 ) 180,252 (876 ) Debt mutual funds 17,628 (2,372 ) 70,489 (10,861 ) 88,117 (13,233 ) Bank loans 41,534 (64 ) 31,080 (39 ) 72,614 (103 ) Commercial mortgage- backed securities 182,372 (2,038 ) 1,512 (620 ) 183,884 (2,658 ) $ 1,533,867 $ (15,748 ) $ 197,719 $ (13,593 ) $ 1,731,586 $ (29,341 ) March 28, 2015 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 $ 7,190 $ (6 ) $ — $ — $ 7,190 $ (6 ) Auction rate securities — — 10,312 (188 ) 10,312 (188 ) Municipal bonds 10,014 (94 ) 1,931 (58 ) 11,945 (152 ) U.S. government and agency securities 451,296 (129 ) — — 451,296 (129 ) Mortgage-backed securities 442,786 (2,901 ) 48,263 (1,270 ) 491,049 (4,171 ) Asset-backed securities 75,009 (159 ) — — 75,009 (159 ) Debt mutual funds 38,608 (1,392 ) 56,592 (4,758 ) 95,200 (6,150 ) Bank loans 65,085 (60 ) — — 65,085 (60 ) Commercial mortgage- backed securities 5,984 (268 ) 944 (57 ) 6,928 (325 ) $ 1,095,972 $ (5,009 ) $ 118,042 $ (6,331 ) $ 1,214,014 $ (11,340 )
Amortized cost and estimated fair value of marketable debt securities	The amortized cost and estimated fair value of marketable debt securities (financial institution securities, non-financial institution securities, auction rate securities, municipal bonds, U.S. and foreign government and agency securities, mortgage-backed securities, asset-backed securities, bank loans and commercial mortgage-backed securities), by contractual maturity, are shown below. Actual maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations without call or prepayment penalties. January 2, 2016 (In thousands) Amortized Estimated Due in one year or less $ 1,232,756 $ 1,232,713 Due after one year through five years 503,374 501,371 Due after five years through ten years 272,546 271,353 Due after ten years 1,153,078 1,148,041 $ 3,161,754 $ 3,153,478
Information on sale of available-for-sale securities	Certain information related to available-for-sale securities is as follows: Three Months Ended Nine Months Ended (In thousands) January 2, 2016 December 27, 2014 January 2, 2016 December 27, 2014 Proceeds from sale of available-for-sale securities $ 82,396 $ 478,562 $ 203,426 $ 774,406 Gross realized gains on sale of available-for-sale securities $ 203 $ 4,759 $ 1,038 $ 7,838 Gross realized losses on sale of available-for-sale securities (221 ) (1,663 ) (439 ) (2,330 ) Net realized gains (losses) on sale of available-for-sale securities $ (18 ) $ 3,096 $ 599 $ 5,508 Amortization of premiums on available-for-sale securities $ 6,906 $ 5,913 $ 20,417 $ 18,559

Derivative Financial Instrume32

Derivative Financial Instruments (Tables)	9 Months Ended
	Jan. 02, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Forward currency exchange contracts outstanding	As of January 2, 2016 and March 28, 2015 , the Company had the following outstanding forward currency exchange contracts (in notional amount), which were derivative financial instruments: (In thousands and U.S. dollars) January 2, 2016 March 28, 2015 Singapore Dollar $ 26,620 $ 43,901 Euro 18,262 29,973 Indian Rupee 22,754 22,228 British Pound 11,749 12,946 Japanese Yen 3,338 4,994 $ 82,723 $ 114,042
Derivative Instruments Located on Condensed Consolidated Balance Sheet	The Company had the following derivative instruments as of January 2, 2016 and March 28, 2015 , located on the condensed consolidated balance sheet, utilized for risk management purposes detailed above: Foreign Exchange Contracts Asset Derivatives Liability Derivatives (In thousands) Balance Sheet Location Fair Value Balance Sheet Location Fair Value January 2, 2016 Prepaid expenses and other current assets $ 446 Other accrued liabilities $ 3,084 March 28, 2015 Prepaid expenses and other current assets $ — Other accrued liabilities $ 9,320
Effect Of Derivative Instruments On Condensed Consolidated Statements Of Income	The following table summarizes the effect of derivative instruments on the condensed consolidated statements of income for the third quarter and the first nine months of fiscal 2016 and 2015 : Three Months Ended Nine Months Ended (In thousands) January 2, 2016 December 27, 2014 January 2, 2016 December 27, 2014 Amount of losses recognized in other comprehensive income on derivative (effective portion of cash flow hedging) $ (1,470 ) $ (2,110 ) $ (5,035 ) $ (6,189 ) Amount of losses reclassified from accumulated other comprehensive income into income (effective portion) * $ (2,166 ) $ (1,786 ) $ (6,110 ) $ (768 ) Amount of gains (losses) recorded (ineffective portion) * $ 7 $ (3 ) $ (15 ) $ (16 ) * Recorded in Interest and Other Expense location within the condensed consolidated statements of income.

Stock-Based Compensation Plan33

Stock-Based Compensation Plans (Tables)	9 Months Ended
	Jan. 02, 2016
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 Nine Months Ended (In thousands) January 2, 2016 December 27, 2014 January 2, 2016 December 27, 2014 Stock-based compensation included in: Cost of revenues $ 2,145 $ 2,339 $ 5,872 $ 6,408 Research and development 16,935 14,909 44,561 40,245 Selling, general and administrative 12,383 11,806 34,031 33,247 $ 31,463 $ 29,054 $ 84,464 $ 79,900
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	The per share weighted-average fair value of RSUs granted during the third quarter of fiscal 2016 was $43.41 ( $40.76 for the third quarter of fiscal 2015 ), and for the first nine months of fiscal 2016 was $41.24 ( $43.76 for the first nine months of fiscal 2015 ), which were calculated based on estimates at the date of grant using the following weighted-average assumptions: Three Months Ended Nine Months Ended January 2, 2016 December 27, 2014 January 2, 2016 December 27, 2014 Risk-free interest rate 1.3 % 1.3 % 1.3 % 0.7 % Dividend yield 2.7 % 2.7 % 2.8 % 2.4 %
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]	The fair values of stock purchase plan rights granted in the second quarter of fiscal 2016 and 2015 were estimated using the Black-Scholes option pricing model at the date of grant using the following assumptions: 2016 2015 Expected life of options (years) 1.25 1.25 Expected stock price volatility 0.25 0.25 Risk-free interest rate 0.4 % 0.2 % Dividend yield 3.0 % 2.8 %
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Summary of option plans activity	A summary of the Company’s option plans activity and related information is as follows: Options Outstanding (Shares in thousands) Number of Shares Weighted-Average Exercise Price Per Share March 29, 2014 5,280 $ 25.22 Exercised (2,009 ) $ 25.80 Forfeited/cancelled/expired (24 ) $ 32.22 March 28, 2015 3,247 $ 24.81 Exercised (1,503 ) $ 24.43 Forfeited/cancelled/expired (12 ) $ 31.99 January 2, 2016 1,732 $ 25.09 Options exercisable at: January 2, 2016 1,705 $ 24.96 March 28, 2015 3,173 $ 24.59
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 29, 2014 6,901 $ 35.08 Granted 3,201 $ 43.11 Vested (2,698 ) $ 33.82 Cancelled (531 ) $ 32.91 March 28, 2015 6,873 $ 39.07 Granted 2,889 $ 41.24 Vested (2,287 ) $ 37.16 Cancelled (517 ) $ 39.77 January 2, 2016 6,958 $ 40.54

Net Income Per Common Share Net

Net Income Per Common Share Net Income Per Common Share (Tables)	9 Months Ended
	Jan. 02, 2016
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 Nine Months Ended (In thousands, except per share amounts) January 2, 2016 December 27, 2014 January 2, 2016 December 27, 2014 Net income available to common stockholders $ 130,819 $ 168,466 $ 405,833 $ 513,593 Weighted average common shares outstanding-basic 256,450 262,881 257,491 266,299 Dilutive effect of employee equity incentive plans 2,538 3,138 2,416 3,463 Dilutive effect of 2017 Convertible Notes and warrants 10,623 7,776 8,809 7,947 Weighted average common shares outstanding-diluted 269,611 273,795 268,716 277,709 Basic earnings per common share $ 0.51 $ 0.64 $ 1.58 $ 1.93 Diluted earnings per common share $ 0.49 $ 0.62 $ 1.51 $ 1.85

Inventories Inventories (Tables

Inventories Inventories (Tables)	9 Months Ended
	Jan. 02, 2016
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 NRV) and are comprised of the following: (In thousands) January 2, 2016 March 28, 2015 Raw materials $ 13,707 $ 14,174 Work-in-process 141,529 183,472 Finished goods 40,733 33,682 $ 195,969 $ 231,328

Debt and Credit Facility (Table

Debt and Credit Facility (Tables)	9 Months Ended
	Jan. 02, 2016
Two And Six Two Five Percent Senior Convertible Debentures [Member]
Schedule of Debt Instruments [Line Items]
Carrying values of liability and equity components of debentures	The carrying values of the liability and equity components of the 2017 Convertible Notes are reflected in the Company’s condensed consolidated balance sheets as follows: (In thousands) January 2, 2016 March 28, 2015 Liability component: Principal amount of the 2017 Convertible Notes $ 600,000 $ 600,000 Unamortized discount of liability component (22,021 ) (33,679 ) Hedge accounting adjustment – sale of interest rate swap 6,364 9,732 Net carrying value of the 2017 Convertible Notes $ 584,343 $ 576,053 Equity component (including temporary equity) – net carrying value $ 66,415 $ 66,415
Interest Expense Related to Debentures [Table Text Block]	Interest expense related to the 2017 Convertible Notes was included in interest and other expense, net on the condensed consolidated statements of income as follows: Three Months Ended Nine Months Ended (In thousands) January 2, 2016 December 27, 2014 January 2, 2016 December 27, 2014 Contractual coupon interest $ 3,938 $ 3,938 $ 11,813 $ 11,813 Amortization of debt issuance costs 362 362 1,086 1,086 Amortization of debt discount, net 2,763 2,763 8,289 8,289 Total interest expense related to the 2017 Convertible Notes $ 7,063 $ 7,063 $ 21,188 $ 21,188
2019 and 2021 Notes Payable [Member]
Schedule of Debt Instruments [Line Items]
Schedule of Long-term Debt Instruments [Table Text Block]	The following table summarizes the carrying value of the 2019 and 2021 Notes as of January 2, 2016 and March 28, 2015 : (In thousands) January 2, 2016 March 28, 2015 Principal amount of the 2019 Notes $ 500,000 $ 500,000 Unamortized discount of the 2019 Notes (1,689 ) (2,073 ) Principal amount of the 2021 Notes 500,000 500,000 Unamortized discount of the 2021 Notes (2,727 ) (3,088 ) Total carrying value $ 995,584 $ 994,839
Interest Expense Related to Debentures [Table Text Block]	Interest expense related to the 2019 and 2021 Notes was included in interest and other expense, net on the condensed consolidated statements of income as follows: Three Months Ended Nine Months Ended (In thousands) January 2, 2016 December 27, 2014 January 2, 2016 December 27, 2014 Contractual coupon interest $ 6,406 $ 6,406 $ 19,219 $ 19,219 Amortization of debt issuance costs 146 146 439 436 Amortization of debt discount, net 251 244 745 725 Total interest expense related to the 2019 and 2021 Notes $ 6,803 $ 6,796 $ 20,403 $ 20,380

Interest And Other Expense, N37

Interest And Other Expense, Net (Tables)	9 Months Ended
	Jan. 02, 2016
Other Income and Expenses [Abstract]
Components of interest and other expense, net	The components of interest and other expense, net are as follows: Three Months Ended Nine Months Ended (In thousands) January 2, 2016 December 27, 2014 January 2, 2016 December 27, 2014 Interest income $ 12,640 $ 11,375 $ 28,739 $ 28,268 Interest expense (13,866 ) (13,859 ) (41,591 ) (41,567 ) Other expense, net (3,827 ) (1,523 ) (11,941 ) (2,661 ) $ (5,053 ) $ (4,007 ) $ (24,793 ) $ (15,960 )

Accumulated Other Comprehensi38

Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Jan. 02, 2016
Equity [Abstract]
Components of accumulated other comprehensive income (loss)	The components of accumulated other comprehensive loss are as follows: (In thousands) January 2, 2016 March 28, 2015 Accumulated unrealized losses on available-for-sale securities, net of tax $ (13,517 ) $ (238 ) Accumulated unrealized losses on hedging transactions, net of tax (2,487 ) (7,523 ) Accumulated cumulative translation adjustment, net of tax (5,385 ) (3,388 ) Accumulated other comprehensive loss $ (21,389 ) $ (11,149 )

Commitments (Tables)

Commitments (Tables)	9 Months Ended
	Jan. 02, 2016
Commitments and Contingencies Disclosure [Abstract]
Future minimum lease payments under non-cancelable operating leases	Approximate future minimum lease payments under non-cancelable operating leases are as follows: Fiscal (In thousands) 2016 (remaining three months) $ 1,220 2017 4,268 2018 3,061 2019 2,812 2020 2,000 Thereafter 2,210 Total $ 15,571

Goodwill and Acquisition-Rela40

Goodwill and Acquisition-Related Intangibles (Tables)	9 Months Ended
	Jan. 02, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Gross and net amounts of goodwill and of acquisition-related intangibles	As of January 2, 2016 and March 28, 2015 , the gross and net amounts of goodwill and of acquisition-related intangibles for all acquisitions were as follows: Weighted-Average (In thousands) January 2, 2016 March 28, 2015 Amortization Life Goodwill $ 159,296 $ 159,296 Core technology, gross 77,640 77,640 5.6 years Less accumulated amortization (70,244 ) (64,988 ) Core technology, net 7,396 12,652 Other intangibles, gross 46,606 46,606 2.7 years Less accumulated amortization (46,556 ) (46,506 ) Other intangibles, net 50 100 Total acquisition-related intangibles, gross 124,246 124,246 Less accumulated amortization (116,800 ) (111,494 ) Total acquisition-related intangibles, net $ 7,446 $ 12,752
Schedule of expected annual amortization expense for acquisition-related intangibles	Based on the carrying value of acquisition-related intangibles recorded as of January 2, 2016 , and assuming no subsequent impairment of the underlying assets, the annual amortization expense for acquisition-related intangibles is expected to be as follows: Fiscal (In thousands) 2016 (remaining three months) $ 1,244 2017 4,761 2018 1,374 2019 67 Total $ 7,446

Significant Customers and Con41

Significant Customers and Concentrations of Credit Risk (Details) - Customer	3 Months Ended		9 Months Ended
	Jan. 02, 2016	Dec. 27, 2014	Jan. 02, 2016	Dec. 27, 2014	Mar. 28, 2015
Significant Customers and Concentrations of Credit Risk [Abstract]
Percentage of Accounts Receivable Accounted From Company Distributor One	51.00%		51.00%		67.00%
Percentage of net revenues through resale of product from Company Distributor One	49.00%	40.00%	50.00%	42.00%
Number of End Customers Accounted For 10% or More of Net Revenues	0	0	0	0
Percentage of higher grade securities investment in debt securities	88.00%		88.00%
Percentage of Mortgage Backed Securities In Investment Portfolio	33.00%		33.00%

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Jan. 02, 2016	Dec. 27, 2014	Jan. 02, 2016	Dec. 27, 2014	Sep. 26, 2015	Mar. 28, 2015	Sep. 27, 2014	Mar. 29, 2014
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		$ 10,111	$ 10,325	$ 10,111	$ 10,325	$ 10,413	$ 10,312	$ 20,608	$ 20,160
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		(302)	717	(201)	1,165
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements)	[1]	0	$ (11,000)	0	$ (11,000)
Fair Value, Measurements, Recurring [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure, Recurring		3,464,028		3,464,028			3,471,356
Derivative Liability		2,638		2,638			9,251
Fair Value Assets Measured On Recurring Basis Net		3,461,390		3,461,390			3,462,105
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure, Recurring		350,407		350,407			492,097
Derivative Liability		0		0			0
Fair Value Assets Measured On Recurring Basis Net		350,407		350,407			492,097
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure, Recurring		3,103,510		3,103,510			2,968,947
Derivative Liability		2,638		2,638			9,251
Fair Value Assets Measured On Recurring Basis Net		3,100,872		3,100,872			2,959,696
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure, Recurring		10,111		10,111			10,312
Derivative Liability		0		0			0
Fair Value Assets Measured On Recurring Basis Net		10,111		10,111			10,312
Fair Value, Measurements, 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, Recurring		222,433		222,433			235,583
Fair Value, Measurements, 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, Recurring		63,995		63,995			229,999
Fair Value, Measurements, 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, Recurring		319,224		319,224			89,995
Fair Value, Measurements, 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, Recurring		80,493		80,493			200,392
Fair Value, Measurements, 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, Recurring		54,997		54,997			37,996
Fair Value, Measurements, 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, Recurring		222,433		222,433			235,583
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, 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, Recurring		25,007		25,007			0
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, 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, Recurring		63,995		63,995			229,999
Fair Value, Measurements, 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, Recurring		319,224		319,224			89,995
Fair Value, Measurements, 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, Recurring		55,486		55,486			200,392
Fair Value, Measurements, 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, Recurring		54,997		54,997			37,996
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, 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, Recurring		264,950		264,950			75,000
Fair Value, Measurements, 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, Recurring		353,443		353,443			339,029
Fair Value, Measurements, Recurring [Member] | Short-Term Investments [Member] | Municipal Bonds [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure, Recurring		59,019		59,019			40,006
Fair Value, Measurements, 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, Recurring		217,824		217,824			557,524
Fair Value, Measurements, 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, Recurring		81,378		81,378			159,936
Fair Value, Measurements, 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, Recurring		206,793		206,793			204,510
Fair Value, Measurements, 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, Recurring		987,110		987,110			859,330
Fair Value, Measurements, 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, Recurring		34,883		34,883			38,608
Fair Value, Measurements, Recurring [Member] | Short-Term Investments [Member] | Bank Loans [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure, Recurring		102,652		102,652			98,100
Fair Value, Measurements, 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, Recurring		190,220		190,220			38,446
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 1 [Member] | Municipal Bonds [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure, Recurring		0		0			0
Fair Value, Measurements, 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, Recurring		102,967		102,967			256,514
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 1 [Member] | Bank Loans [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure, Recurring		0		0			0
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, 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, Recurring		264,950		264,950			75,000
Fair Value, Measurements, 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, Recurring		353,443		353,443			339,029
Fair Value, Measurements, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 2 [Member] | Municipal Bonds [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure, Recurring		59,019		59,019			40,006
Fair Value, Measurements, 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, Recurring		114,857		114,857			301,010
Fair Value, Measurements, 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, Recurring		81,378		81,378			159,936
Fair Value, Measurements, 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, Recurring		206,793		206,793			204,510
Fair Value, Measurements, 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, Recurring		987,110		987,110			859,330
Fair Value, Measurements, 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, Recurring		34,883		34,883			38,608
Fair Value, Measurements, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 2 [Member] | Bank Loans [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure, Recurring		102,652		102,652			98,100
Fair Value, Measurements, 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, Recurring		190,220		190,220			38,446
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 3 [Member] | Municipal Bonds [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure, Recurring		0		0			0
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, Recurring [Member] | Short-Term Investments [Member] | Fair Value, Inputs, Level 3 [Member] | Bank Loans [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure, Recurring		0		0			0
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, Recurring [Member] | Long-Term Investments [Member] | Student loan auction rate securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure, Recurring		10,111		10,111			10,312
Fair Value, Measurements, Recurring [Member] | Long-Term Investments [Member] | Municipal Bonds [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure, Recurring		7,176		7,176			9,650
Fair Value, Measurements, Recurring [Member] | Long-Term Investments [Member] | Asset-backed Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure, Recurring		6,874		6,874			7,948
Fair Value, Measurements, Recurring [Member] | Long-Term Investments [Member] | Mortgage-Backed Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure, Recurring		147,038		147,038			180,906
Fair Value, Measurements, 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, Recurring		53,234		53,234			56,592
Fair Value, Measurements, Recurring [Member] | Long-Term Investments [Member] | Commercial Mortgage Backed Securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure, Recurring		181		181			1,494
Fair Value, Measurements, Recurring [Member] | Long-Term Investments [Member] | Fair Value, Inputs, Level 1 [Member] | Student loan auction rate securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure, Recurring		0		0			0
Fair Value, Measurements, Recurring [Member] | Long-Term Investments [Member] | Fair Value, Inputs, Level 1 [Member] | Municipal Bonds [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure, Recurring		0		0			0
Fair Value, Measurements, Recurring [Member] | Long-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, Recurring		0		0			0
Fair Value, Measurements, Recurring [Member] | Long-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, Recurring		0		0			0
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, Recurring [Member] | Long-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, Recurring		0		0			0
Fair Value, Measurements, Recurring [Member] | Long-Term Investments [Member] | Fair Value, Inputs, Level 2 [Member] | Student loan auction rate securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure, Recurring		0		0			0
Fair Value, Measurements, Recurring [Member] | Long-Term Investments [Member] | Fair Value, Inputs, Level 2 [Member] | Municipal Bonds [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure, Recurring		7,176		7,176			9,650
Fair Value, Measurements, Recurring [Member] | Long-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, Recurring		6,874		6,874			7,948
Fair Value, Measurements, Recurring [Member] | Long-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, Recurring		147,038		147,038			180,906
Fair Value, Measurements, 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, Recurring		53,234		53,234			56,592
Fair Value, Measurements, Recurring [Member] | Long-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, Recurring		181		181			1,494
Fair Value, Measurements, Recurring [Member] | Long-Term Investments [Member] | Fair Value, Inputs, Level 3 [Member] | Student loan auction rate securities [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure, Recurring		10,111		10,111			10,312
Fair Value, Measurements, Recurring [Member] | Long-Term Investments [Member] | Fair Value, Inputs, Level 3 [Member] | Municipal Bonds [Member]
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets, Fair Value Disclosure, Recurring		0		0			0
Fair Value, Measurements, Recurring [Member] | Long-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, Recurring		0		0			0
Fair Value, Measurements, Recurring [Member] | Long-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, Recurring		0		0			0
Fair Value, Measurements, 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, Recurring		0		0			0
Fair Value, Measurements, Recurring [Member] | Long-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, Recurring		$ 0		$ 0			$ 0
[1]	During the first nine months of fiscal 2015, the Company redeemed $11.0 million of student loan auction rate securities for cash at par value. There was no redemption during the first nine months of fiscal 2016.

Fair Value Measurements (Deta43

Fair Value Measurements (Details 1) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Jan. 02, 2016	Dec. 27, 2014	Jan. 02, 2016	Dec. 27, 2014
Changes in Level 3 instruments measured at fair value on a recurring basis
Balance as of beginning of period		$ 10,413	$ 20,608	$ 10,312	$ 20,160
Total realized and unrealized gains (losses) included in other comprehensive income		(302)	717	(201)	1,165
Sales and settlements, net	[1]	0	(11,000)	0	(11,000)
Balance as of end of period		$ 10,111	$ 10,325	$ 10,111	$ 10,325
[1]	During the first nine months of fiscal 2015, the Company redeemed $11.0 million of student loan auction rate securities for cash at par value. There was no redemption during the first nine months of fiscal 2016.

Fair Value Measurements (Deta44

Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	Jan. 02, 2016	Mar. 28, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Noncurrent	$ 224,614	$ 266,902	[1]
Available-for-sale Securities	3,464,028	$ 3,471,356
Senior Notes [Member] | 2.125% 2019 Senior Debentures [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of debentures	497,300
Senior Notes [Member] | 3.0% 2021 Senior Debentures [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of debentures	503,400
Convertible Notes [Member] | Two And Six Two Five Percent Senior Convertible Debentures [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of debentures	$ 976,500
[1]	Derived from audited financial statements

Financial Instruments (Details)

Financial Instruments (Details) - USD ($) $ in Thousands	Jan. 02, 2016	Mar. 28, 2015
Available-for-sale securities
Amortized Cost	$ 3,485,537	$ 3,471,735
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	7,832	10,961
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(29,341)	(11,340)
Estimated Fair Value	3,464,028	3,471,356
Money Market Funds [Member]
Available-for-sale securities
Amortized Cost	222,433	235,583
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	0	0
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	0	0
Estimated Fair Value	222,433	235,583
Financial institution securities [Member]
Available-for-sale securities
Amortized Cost	328,945	304,999
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	0	0
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	0	0
Estimated Fair Value	328,945	304,999
Non-financial institution securities [Member]
Available-for-sale securities
Amortized Cost	673,436	429,005
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	38	25
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(807)	(6)
Estimated Fair Value	672,667	429,024
Auction Rate Securities [Member]
Available-for-sale securities
Amortized Cost	10,500	10,500
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	0	0
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(389)	(188)
Estimated Fair Value	10,111	10,312
Municipal Bonds [Member]
Available-for-sale securities
Amortized Cost	65,920	49,064
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	577	744
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(302)	(152)
Estimated Fair Value	66,195	49,656
U.S. Government and Agency Securities [Member]
Available-for-sale securities
Amortized Cost	298,492	757,954
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	21	91
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(196)	(129)
Estimated Fair Value	298,317	757,916
Foreign Government and Agency Securities [Member]
Available-for-sale securities
Amortized Cost	136,384	197,932
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	0	0
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(9)	0
Estimated Fair Value	136,375	197,932
Mortgage-Backed Securities [Member]
Available-for-sale securities
Amortized Cost	1,138,412	1,035,598
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	6,504	8,809
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(10,768)	(4,171)
Estimated Fair Value	1,134,148	1,040,236
Asset-backed Securities [Member]
Available-for-sale securities
Amortized Cost	213,908	211,487
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	635	1,130
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(876)	(159)
Estimated Fair Value	213,667	212,458
Debt Mutual Fund [Member]
Available-for-sale securities
Amortized Cost	101,350	101,350
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	0	0
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(13,233)	(6,150)
Estimated Fair Value	88,117	95,200
Bank Loans [Member]
Available-for-sale securities
Amortized Cost	102,724	98,131
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	31	29
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(103)	(60)
Estimated Fair Value	102,652	98,100
Commercial Mortgage Backed Securities [Member]
Available-for-sale securities
Amortized Cost	193,033	40,132
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	26	133
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(2,658)	(325)
Estimated Fair Value	$ 190,401	$ 39,940

Financial Instruments (Details

Financial Instruments (Details 1) - USD ($) $ in Thousands	Jan. 02, 2016	Mar. 28, 2015
Fair values and gross unrealized losses of the investments
Available-for-Sale Securities, Less Than 12 Months, Fair Value	$ 1,533,867	$ 1,095,972
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses	(15,748)	(5,009)
Available-for-Sale Securities, 12 Months or Greater, Fair Value	197,719	118,042
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses	(13,593)	(6,331)
Available-for-Sale Securities, Fair Value, Total	1,731,586	1,214,014
Available-for-Sale Securities, Gross Unrealized Losses, Total	(29,341)	(11,340)
Non-financial institution securities [Member]
Fair values and gross unrealized losses of the investments
Available-for-Sale Securities, Less Than 12 Months, Fair Value	113,246	7,190
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses	(807)	(6)
Available-for-Sale Securities, 12 Months or Greater, Fair Value	0	0
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses	0	0
Available-for-Sale Securities, Fair Value, Total	113,246	7,190
Available-for-Sale Securities, Gross Unrealized Losses, Total	(807)	(6)
Auction Rate Securities [Member]
Fair values and gross unrealized losses of the investments
Available-for-Sale Securities, Less Than 12 Months, Fair Value	0	0
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses	0	0
Available-for-Sale Securities, 12 Months or Greater, Fair Value	10,111	10,312
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses	(389)	(188)
Available-for-Sale Securities, Fair Value, Total	10,111	10,312
Available-for-Sale Securities, Gross Unrealized Losses, Total	(389)	(188)
Municipal Bonds [Member]
Fair values and gross unrealized losses of the investments
Available-for-Sale Securities, Less Than 12 Months, Fair Value	24,009	10,014
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses	(148)	(94)
Available-for-Sale Securities, 12 Months or Greater, Fair Value	3,408	1,931
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses	(154)	(58)
Available-for-Sale Securities, Fair Value, Total	27,417	11,945
Available-for-Sale Securities, Gross Unrealized Losses, Total	(302)	(152)
U.S. Government and Agency Securities [Member]
Fair values and gross unrealized losses of the investments
Available-for-Sale Securities, Less Than 12 Months, Fair Value	167,906	451,296
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses	(196)	(129)
Available-for-Sale Securities, 12 Months or Greater, Fair Value	0	0
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses	0	0
Available-for-Sale Securities, Fair Value, Total	167,906	451,296
Available-for-Sale Securities, Gross Unrealized Losses, Total	(196)	(129)
Foreign Government Debt Securities [Member]
Fair values and gross unrealized losses of the investments
Available-for-Sale Securities, Less Than 12 Months, Fair Value	9,986
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses	(9)
Available-for-Sale Securities, 12 Months or Greater, Fair Value	0
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses	0
Available-for-Sale Securities, Fair Value, Total	9,986
Available-for-Sale Securities, Gross Unrealized Losses, Total	(9)
Mortgage-Backed Securities [Member]
Fair values and gross unrealized losses of the investments
Available-for-Sale Securities, Less Than 12 Months, Fair Value	822,404	442,786
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses	(9,365)	(2,901)
Available-for-Sale Securities, 12 Months or Greater, Fair Value	55,649	48,263
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses	(1,403)	(1,270)
Available-for-Sale Securities, Fair Value, Total	878,053	491,049
Available-for-Sale Securities, Gross Unrealized Losses, Total	(10,768)	(4,171)
Asset-backed Securities [Member]
Fair values and gross unrealized losses of the investments
Available-for-Sale Securities, Less Than 12 Months, Fair Value	154,782	75,009
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses	(749)	(159)
Available-for-Sale Securities, 12 Months or Greater, Fair Value	25,470	0
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses	(127)	0
Available-for-Sale Securities, Fair Value, Total	180,252	75,009
Available-for-Sale Securities, Gross Unrealized Losses, Total	(876)	(159)
Debt Mutual Fund [Member]
Fair values and gross unrealized losses of the investments
Available-for-Sale Securities, Less Than 12 Months, Fair Value	17,628	38,608
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses	(2,372)	(1,392)
Available-for-Sale Securities, 12 Months or Greater, Fair Value	70,489	56,592
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses	(10,861)	(4,758)
Available-for-Sale Securities, Fair Value, Total	88,117	95,200
Available-for-Sale Securities, Gross Unrealized Losses, Total	(13,233)	(6,150)
Bank Loans [Member]
Fair values and gross unrealized losses of the investments
Available-for-Sale Securities, Less Than 12 Months, Fair Value	41,534	65,085
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses	(64)	(60)
Available-for-Sale Securities, 12 Months or Greater, Fair Value	31,080	0
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses	(39)	0
Available-for-Sale Securities, Fair Value, Total	72,614	65,085
Available-for-Sale Securities, Gross Unrealized Losses, Total	(103)	(60)
Commercial Mortgage Backed Securities [Member]
Fair values and gross unrealized losses of the investments
Available-for-Sale Securities, Less Than 12 Months, Fair Value	182,372	5,984
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses	(2,038)	(268)
Available-for-Sale Securities, 12 Months or Greater, Fair Value	1,512	944
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses	(620)	(57)
Available-for-Sale Securities, Fair Value, Total	183,884	6,928
Available-for-Sale Securities, Gross Unrealized Losses, Total	$ (2,658)	$ (325)

Financial Instruments (Detail47

Financial Instruments (Details 2) $ in Thousands	Jan. 02, 2016USD ($)
Investments, All Other Investments [Abstract]
Marketable debt securities with contractual maturities greater than one year but classified as short-term investment	$ 1,780,000
Amortized cost and estimated fair value of marketable debt securities
Amortized Cost Due in one year or less	1,232,756
Amortized Cost Due after one year through five years	503,374
Amortized Cost Due after five years through ten years	272,546
Amortized Cost Due after ten years	1,153,078
Amortized Cost Total	3,161,754
Estimated Fair Value Due in one year or less	1,232,713
Estimated Fair Value Due after one year through five years	501,371
Estimated Fair Value Due after five years through ten years	271,353
Estimated Fair Value Due after ten years	1,148,041
Estimated Fair Value Total	$ 3,153,478

Financial Instruments (Detail48

Financial Instruments (Details 3) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 02, 2016	Dec. 27, 2014	Jan. 02, 2016	Dec. 27, 2014
Investments, All Other Investments [Abstract]
Proceeds from Sale of Available-for-sale Securities	$ 82,396	$ 478,562	$ 203,426	$ 774,406
Information on sale of available-for-sale securities
Gross realized gains on sale of available-for-sale securities	203	4,759	1,038	7,838
Gross realized losses on sale of available-for-sale securities	(221)	(1,663)	(439)	(2,330)
Net realized gains (losses) on sale of available-for-sale securities	(18)	3,096	599	5,508
Amortization of premiums on available-for-sale securities	$ 6,906	$ 5,913	$ 20,417	$ 18,559

Derivative Financial Instrume49

Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Jan. 02, 2016	Mar. 28, 2015
Derivative [Line Items]
Derivative Asset, Notional Amount	$ 82,723	$ 114,042
Singapore Dollar [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	26,620	43,901
Euro [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	18,262	29,973
Indian Rupee [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	22,754	22,228
British Pound [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	11,749	12,946
Japanese Yen [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	$ 3,338	$ 4,994

Derivative Financial Instrume50

Derivative Financial Instruments (Details 1) - USD ($) $ in Thousands	Jan. 02, 2016	Mar. 28, 2015
Prepaid expenses and other current assets
Derivative Instruments located on Condensed Consolidated Balance sheet
Asset Derivatives, Fair Value	$ 446	$ 0
Other accrued liabilities
Derivative Instruments located on Condensed Consolidated Balance sheet
Liability Derivatives, Fair Value	$ 3,084	$ 9,320

Derivative Financial Instrume51

Derivative Financial Instruments (Details 2) - Cash Flow Hedging [Member] - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Jan. 02, 2016	Dec. 27, 2014	Jan. 02, 2016	Dec. 27, 2014
Foreign Exchange Contracts [Member]
Effect of derivative instruments located on condensed consolidated Statements of Income
Amount of losses recognized in other comprehensive income on derivative (effective portion of cash flow hedging)		$ (1,470)	$ (2,110)	$ (5,035)	$ (6,189)
Other Nonoperating Income (Expense) [Member]
Effect of derivative instruments located on condensed consolidated Statements of Income
Amount of (gains) losses reclassified from accumulated other comprehensive income into income (effective portion)	[1]	(2,166)	(1,786)	(6,110)	(768)
Amount of gains (losses) recorded (ineffective portion)	[1]	$ 7	$ (3)	$ (15)	$ (16)
[1]	Recorded in Interest and Other Expense location within the condensed consolidated statements of income.

Derivative Financial Instrume52

Derivative Financial Instruments (Details Textual)	9 Months Ended
	Jan. 02, 2016
Derivative [Line Items]
Hedging Program number of years	2 years
Maturity of Foreign Currency Derivatives	Feb. 13, 2017
Number of Months Net Unrealized Gains/Losses are expected to be realized into Net Income	12 months

Stock-Based Compensation Plan53

Stock-Based Compensation Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 02, 2016	Dec. 27, 2014	Jan. 02, 2016	Dec. 27, 2014
Stock Based compensation expense
Stock-based compensation effect on income before taxes	$ 31,463	$ 29,054	$ 84,464	$ 79,900
Cost of Sales [Member]
Stock Based compensation expense
Stock-based compensation effect on income before taxes	2,145	2,339	5,872	6,408
Research and Development [Member]
Stock Based compensation expense
Stock-based compensation effect on income before taxes	16,935	14,909	44,561	40,245
Selling, General and Administrative Expenses [Member]
Stock Based compensation expense
Stock-based compensation effect on income before taxes	$ 12,383	$ 11,806	$ 34,031	$ 33,247

Stock-Based Compensation Plan54

Stock-Based Compensation Plans (Details 1)	3 Months Ended		9 Months Ended
	Jan. 02, 2016	Dec. 27, 2014	Jan. 02, 2016	Dec. 27, 2014
Weighted average assumptions in estimation of fair value of stock options
Risk-free interest rate	1.30%	1.30%	1.30%	0.70%
Dividend yield	2.70%	2.70%	2.80%	2.40%

Stock-Based Compensation Plan55

Stock-Based Compensation Plans (Details 2) - $ / shares shares in Thousands	9 Months Ended	12 Months Ended
	Jan. 02, 2016	Mar. 28, 2015
Summary of options activity
Number of Shares, Beginning Balance	3,247	5,280
Number of Shares, Exercised	(1,503)	(2,009)
Number of Shares, Forfeited/Cancelled/Expired	(12)	(24)
Number of Shares, Ending Balance	1,732	3,247
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	1,705	3,173
Weighted-Average Exercise Price Per Share, Beginning Balance	$ 24.81	$ 25.22
Weighted-Average Exercise Price Per Share, Exercised	24.43	25.80
Weighted-Average Exercise Price Per Share, Forfeited/Cancelled/Expired	31.99	32.22
Weighted-Average Exercise Price Per Share, Ending Balance Balance	25.09	24.81
Weighted-Average Exercise Price Per Share, Options Exercisable	$ 24.96	$ 24.59

Stock-Based Compensation Plan56

Stock-Based Compensation Plans (Details 3) - $ / shares shares in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Jan. 02, 2016	Dec. 27, 2014	Jan. 02, 2016	Dec. 27, 2014	Mar. 28, 2015
Summary Of Restricted Stock Unit Activity and Related Information
Number of Shares, Beginning Balance			6,873	6,901	6,901
Number of Shares, Granted			2,889		3,201
Number of Shares, Vested			(2,287)		(2,698)
Number of Shares, Forfeited/Cancelled			(517)		(531)
Number of Shares, Ending Balance	6,958		6,958		6,873
Weighted-Average Grant-Date Fair Value, Beginning Balance			$ 39.07	$ 35.08	$ 35.08
Weighted-Average Grant-Date Fair Value, Granted					43.11
Weighted-Average Grant-Date Fair Value, Vested			37.16		33.82
Weighted-Average Grant-Date Fair Value, Forfeited/Cancelled			39.77		32.91
Weighted-Average Grant-Date Fair Value, Ending Balance	$ 40.54		40.54		$ 39.07
Restricted Stock Units (RSUs) [Member]
Summary Of Restricted Stock Unit Activity and Related Information
Weighted-Average Grant-Date Fair Value, Granted	$ 43.41	$ 40.76	$ 41.24	$ 43.76

Stock-Based Compensation Plan57

Stock-Based Compensation Plans (Details Textual) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended				9 Months Ended		12 Months Ended
	Jan. 02, 2016	Sep. 26, 2015	Dec. 27, 2014	Sep. 27, 2014	Jan. 02, 2016	Dec. 27, 2014	Mar. 28, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Payments Related to Tax Withholding for Share-based Compensation					$ 29.8	$ 33.2
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net					8.5	12.3
Weighted-Average Grant-Date Fair Value, Granted							$ 43.11
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 8.3		$ 11.7		$ 31.6	$ 27.7
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	1.30%		1.30%		1.30%	0.70%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate	2.70%		2.70%		2.80%	2.40%
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-Average Grant-Date Fair Value, Granted	$ 43.41		$ 40.76		$ 41.24	$ 43.76
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Shares, Employee Stock Purchase Plans		438		446
Stock Issued During Period, Value, Employee Stock Purchase Plan		$ 14.5		$ 14.9
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term		1 year 3 months		1 year 3 months
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate		24.50%		25.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate		0.40%		0.20%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate		3.00%		2.80%
Equity Plan Two Thousand Seven [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Available for Grant	13,000				13,000
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-Average Grant-Date Fair Value, Granted		$ 9.78		$ 9.75
Shares Available for Grant	10,100				10,100

Net Income Per Common Share (De

Net Income Per Common Share (Details) shares in Thousands	3 Months Ended	9 Months Ended
	Jan. 02, 2016$ / sharesshares	Jan. 02, 2016shares
Schedule of Debt Instruments [Line Items]
Antidilutive shares excluded from computation of dilutive net income per common share	222	3,700
Two And Six Two Five Percent Senior Convertible Debentures [Member]
Schedule of Debt Instruments [Line Items]
Maximum number of common shares to be purchased under call option	20,500	20,500
Price Per Share To Be Purchase By Company Under Call Option | $ / shares	$ 29.2608

Net Income Per Common Share N59

Net Income Per Common Share Net Income Per Common Share (Details 2) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 02, 2016	Dec. 27, 2014	Jan. 02, 2016	Dec. 27, 2014
Earnings Per Share [Abstract]
Net income	$ 130,819	$ 168,466	$ 405,833	$ 513,593
Weighted Average Number of Shares Outstanding, Basic	256,450	262,881	257,491	266,299
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	2,538	3,138	2,416	3,463
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities and Warrants	10,623	7,776	8,809	7,947
Weighted Average Number of Shares Outstanding, Diluted	269,611	273,795	268,716	277,709
Earnings Per Share, Basic	$ 0.51	$ 0.64	$ 1.58	$ 1.93
Earnings Per Share, Diluted	$ 0.49	$ 0.62	$ 1.51	$ 1.85

Inventories Inventories (Detail

Inventories Inventories (Details) - USD ($) $ in Thousands	Jan. 02, 2016	Mar. 28, 2015
Inventory Disclosure [Abstract]
Inventory, Raw Materials, Gross	$ 13,707	$ 14,174
Inventory, Work in Process, Gross	141,529	183,472
Inventory, Finished Goods, Gross	40,733	33,682
Inventory, Net	$ 195,969	$ 231,328	[1]
[1]	Derived from audited financial statements

Debt and Credit Facility (Detai

Debt and Credit Facility (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Jan. 02, 2016	Jan. 02, 2016	Mar. 29, 2014	Mar. 28, 2015
Debt Instrument [Line Items]
Long-term Debt, Excluding Current Maturities	$ 995,584	$ 995,584		$ 994,839	[1]
2019 and 2021 Notes Payable [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Long-term Debt			$ 990,100
3.0% 2021 Senior Debentures [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 500,000	500,000
Debt Instrument, Unamortized Discount	(2,727)	$ (2,727)		(3,088)
Debt instrument, Maturity Date		Mar. 15, 2021
Discount Percent of Par			99.281%
2.125% 2019 Senior Debentures [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 500,000	500,000
Debt Instrument, Unamortized Discount	$ (1,689)	$ (1,689)		(2,073)
Debt instrument, Maturity Date		Mar. 15, 2019
Discount Percent of Par			99.477%
Two And Six Two Five Percent Senior Convertible Debentures [Member]
Debt Instrument [Line Items]
Price Per Share To Be Purchase By Company Under Call Option	$ 29.2608
Debt Instrument, Face Amount	$ 600,000	$ 600,000		600,000
Debt Instrument, Unamortized Discount	(22,021)	(22,021)		(33,679)
Debt Instrument Carrying Amount Of Liability Component	584,343	584,343		576,053
Equity component - net carrying value	$ 66,415	$ 66,415		$ 66,415
[1]	Derived from audited financial statements

Debt and Credit Facility (Det62

Debt and Credit Facility (Details 1) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Jan. 02, 2016	Dec. 27, 2014	Jan. 02, 2016	Dec. 27, 2014	Mar. 29, 2014	Mar. 28, 2015
Debt Instrument [Line Items]
Amortization of Debt Discount (Premium)			$ 9,033,000	$ 9,014,000
Line of Credit Facility, Expiration Date			Dec. 31, 2016
Line of Credit Facility, Maximum Borrowing Capacity	$ 250,000,000		$ 250,000,000
Line of Credit Facility, Average Outstanding Amount			0
2019 and 2021 Notes Payable [Member]
Debt Instrument [Line Items]
Interest Expense, Debt, Excluding Amortization	6,406,000	$ 6,406,000	19,219,000	19,219,000
Amortization of Financing Costs	146,000	146,000	439,000	436,000
Amortization of Debt Discount (Premium)	251,000	244,000	745,000	725,000
Interest Expense, Debt	6,803,000	$ 6,796,000	20,403,000	$ 20,380,000
Proceeds from Issuance of Long-term Debt					$ 990,100,000
2.125% 2019 Senior Debentures [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount					$ 500,000,000	$ 500,000,000
Debt Instrument, Unamortized Discount	$ 1,689,000		$ 1,689,000			$ 2,073,000

Debt and Credit Facility (Det63

Debt and Credit Facility (Details 2) $ / shares in Units, shares in Millions	3 Months Ended		9 Months Ended		17 Months Ended
	Jan. 02, 2016USD ($)$ / sharesshares	Dec. 27, 2014USD ($)	Jan. 02, 2016USD ($)$ / sharesshares	Dec. 27, 2014USD ($)	Jun. 15, 2017	Mar. 28, 2015USD ($)
Short-term Debt [Line Items]
Amortization of Debt Discount (Premium)			$ 9,033,000	$ 9,014,000
Two And Six Two Five Percent Senior Convertible Debentures [Member]
Short-term Debt [Line Items]
Maximum number of common shares to be purchased under call option | shares	20.5		20.5
Debt Instrument, Convertible, Remaining Discount Amortization Period					1 year 5 months 13 days
Debt Instrument, Face Amount	$ 600,000,000		$ 600,000,000			$ 600,000,000
Debt Instrument, Convertible, Conversion Ratio	34.1754
Debt Instrument, Unamortized Discount	$ 22,021,000		22,021,000			33,679,000
Hedge Accounting Adjustment - Sale Of Interest Rate Swap	6,364,000		6,364,000			9,732,000
Debt Instrument Carrying Amount Of Liability Component	584,343,000		584,343,000			576,053,000
Debt Instrument, Convertible, Carrying Amount of Equity Component	66,415,000		66,415,000			$ 66,415,000
Interest Expense, Debt, Excluding Amortization	3,938,000	$ 3,938,000	11,813,000	11,813,000
Amortization of Financing Costs	362,000	362,000	1,086,000	1,086,000
Amortization of Debt Discount (Premium)	2,763,000	2,763,000	8,289,000	8,289,000
Interest Expense, Debt	7,063,000	$ 7,063,000	$ 21,188,000	$ 21,188,000
Base conversion, block amount of senior convertible debenture	$ 1,000
Warrants, number of shares the holders have the right to purchase | shares	20.5		20.5
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares	$ 41.45		$ 41.45
Convertible debt, conversion price | $ / shares	$ 29.2608		$ 29.2608
Debt Instrument, Convertible, If-converted Value in Excess of Principal	$ 990,800,000		$ 990,800,000

Common Stock Repurchase Progr64

Common Stock Repurchase Program (Details) - USD ($)	9 Months Ended		14 Months Ended
	Jan. 02, 2016	Dec. 27, 2014	Jan. 02, 2016	Mar. 28, 2015
Accelerated Share Repurchases [Line Items]
Treasury shares	0		0	0
Stock Repurchased During Period, Shares	6,700,000
Payments for Repurchase of Common Stock	$ 299,998,000	$ 476,012,000
Repurchase Program Two Thousand Fourteen [Member]
Accelerated Share Repurchases [Line Items]
Amount authorized for common stock repurchase		800,000,000
Stock Repurchased and Retired During Period, Value	300,000,000		$ 452,600,000
Total amount available for future repurchases	$ 347,400,000		$ 347,400,000
Repurchase Program 2012 [Member]
Accelerated Share Repurchases [Line Items]
Stock Repurchased and Retired During Period, Value		$ 475,000,000
Stock Repurchased and Retired During Period, Shares		11,000,000

Interest and Other Expense, N65

Interest and Other Expense, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 02, 2016	Dec. 27, 2014	Jan. 02, 2016	Dec. 27, 2014
Components of interest and other expense
Interest income	$ 12,640	$ 11,375	$ 28,739	$ 28,268
Interest expense	(13,866)	(13,859)	(41,591)	(41,567)
Other income (expense), net	(3,827)	(1,523)	(11,941)	(2,661)
Interest and other expense, net	$ (5,053)	$ (4,007)	$ (24,793)	$ (15,960)

Accumulated Other Comprehensi66

Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	Jan. 02, 2016	Mar. 28, 2015
Components of accumulated other comprehensive income (loss)
Accumulated unrealized losses on available-for-sale securities, net of tax	$ (13,517)	$ (238)
Accumulated unrealized losses on hedging transactions, net of tax	(2,487)	(7,523)
Accumulated cumulative translation adjustment, net of tax	(5,385)	(3,388)
Accumulated other comprehensive loss	$ (21,389)	$ (11,149)	[1]
[1]	Derived from audited financial statements

Income Taxes (Details Textual)

Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 02, 2016	Dec. 27, 2014	Jan. 02, 2016	Dec. 27, 2014
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit)	$ 24,232	$ 17,536	$ 61,155	$ 67,005
Effective Income Tax Rate Reconciliation, Percent	16.00%	9.00%	13.00%	12.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			35.00%
Unrecognized Tax Benefits, Period Increase (Decrease)	$ 2,400
Unrecognized Tax Benefits	32,400		$ 32,400
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 14,800		$ 14,800

Commitments (Details)

Commitments (Details) $ in Thousands	Jan. 02, 2016USD ($)
Future Minimum Lease Payments Under Non-Cancelable Operating Leases [Abstract]
2016 (remaining 3 months)	$ 1,220
2,017	4,268
2,018	3,061
2,019	2,812
2,020	2,000
Thereafter	2,210
Total	$ 15,571

Commitments (Details Textual)

Commitments (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 02, 2016	Dec. 27, 2014	Jan. 02, 2016	Dec. 27, 2014
Commitments [Line Items]
Lease Expiration Date			Oct. 31, 2021
Aggregate future rental income to be received	$ 2,700		$ 2,700
Rent expense, net of rental income	1,200	$ 792	3,300	$ 2,400
Other commitments	95,500		95,500
Non-cancelable license obligations	49,400		$ 49,400
Software and Maintenance License Obligations Expiration Date			Dec. 14, 2018
Purchase Obligation	$ 24,400		$ 24,400
Minimum [Member]
Commitments [Line Items]
Purchase Commitments, Period for Payment			3 months
Maximum [Member]
Commitments [Line Items]
Purchase Commitments, Period for Payment			6 months
Capital Lease Obligations [Member]
Commitments [Line Items]
Lease Expiration Date			Nov. 30, 2035

Contingencies (Details)

Contingencies (Details) $ in Millions	9 Months Ended
	Jan. 02, 2016USD ($)
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value	$ 50

Goodwill and Acquisition-Rela71

Goodwill and Acquisition-Related Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 02, 2016	Mar. 28, 2015
Gross and net amounts of goodwill and of acquisition-related intangibles
Goodwill	$ 159,296	$ 159,296	[1]
Total acquisition-related intangibles, gross	124,246	124,246
Less accumulated amortization	(116,800)	(111,494)
Total	7,446	12,752
Core Technology [Member]
Gross and net amounts of goodwill and of acquisition-related intangibles
Total acquisition-related intangibles, gross	77,640	77,640
Less accumulated amortization	(70,244)	(64,988)
Total	$ 7,396	12,652
Weighted-Average Amortization Life	5 years 7 months 18 days
Other Intangibles [Member]
Gross and net amounts of goodwill and of acquisition-related intangibles
Total acquisition-related intangibles, gross	$ 46,606	46,606
Less accumulated amortization	(46,556)	(46,506)
Total	$ 50	$ 100
Weighted-Average Amortization Life	2 years 8 months 12 days
[1]	Derived from audited financial statements

Goodwill and Acquisition-Rela72

Goodwill and Acquisition-Related Intangibles (Details 1) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 02, 2016	Dec. 27, 2014	Jan. 02, 2016	Dec. 27, 2014	Mar. 28, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of acquisition-related intangibles	$ 1,769	$ 2,371	$ 5,306	$ 7,167
Schedule of expected annual amortization expense for acquisition-related intangibles
2016 (remaining three months)	1,244		1,244
2,017	4,761		4,761
2,018	1,374		1,374
2,019	67		67
Total	$ 7,446		$ 7,446		$ 12,752

Subsequent Events (Details)

Subsequent Events (Details)	Jan. 19, 2016$ / shares
Subsequent Events [Abstract]
Common Stock, Dividends, Per Share, Declared	$ 0.31

Restructuring Charges (Details)

Restructuring Charges (Details) $ in Millions	3 Months Ended
	Mar. 28, 2015USD ($)position	Jan. 02, 2016USD ($)
Restructuring and Related Activities [Abstract]
Restructuring and Related Cost, Expected Number of Positions Eliminated | position	120
Restructuring and Related Cost, Number of Positions Eliminated, Period Percent	3.00%
Restructuring Charges	$ 24.5
Restructuring Reserve		$ 3