Xilinx (XLNX) 10-K 16 May 14 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Mar. 29, 2014	9-May-14	Sep. 28, 2013
Document and Entity Information [Abstract]	'	'	'
Document Type	'10-K	'	'
Amendment Flag	'false	'	'
Document Period End Date	29-Mar-14	'	'
Document Fiscal Year Focus	'2014	'	'
Document Fiscal Period Focus	'FY	'	'
Entity Registrant Name	'XILINX INC	'	'
Entity Central Index Key	'0000743988	'	'
Entity Well-known Seasoned Issuer	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Current Fiscal Year End Date	'--03-29	'	'
Entity Filer Category	'Large Accelerated Filer	'	'
Entity Common Stock, Shares Outstanding	'	268,794,081	'
Common Stock, par value (in dollars per share)	$0.01	'	'
Entity Public Float	'	'	$10,272,092,000

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Net revenues	$2,382,531	$2,168,652	$2,240,736
Cost of revenues	743,253	737,206	786,078
Gross margin	1,639,278	1,431,446	1,454,658
Operating expenses:	'	'	'
Research and development	492,447	475,522	435,276
Selling, general and administrative	378,607	365,684	365,272
Amortization of acquisition-related intangibles	9,887	9,508	7,568
Restructuring charges	0	0	3,369
Litigation and contingencies	9,410	0	15,400
Total operating expenses	890,351	850,714	826,885
Operating income	748,927	580,732	627,773
Loss on Extinguishment of Debt	9,848	0	0
Interest and other expense, net	29,553	33,726	30,722
Income before income taxes	709,526	547,006	597,051
Provision for income taxes	79,138	59,470	66,972
Net income	$630,388	$487,536	$530,079
Net income per common share:	'	'	'
Basic (in dollars per share)	$2.37	$1.86	$2.01
Diluted (in dollars per share)	$2.19	$1.79	$1.95
Shares used in per share calculations:	'	'	'
Basic (in shares)	266,431	261,652	263,783
Diluted (in shares)	287,396	272,573	272,157

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Statement of Comprehensive Income [Abstract]	'	'	'
Net income	$630,388	$487,536	$530,079
Other comprehensive income (loss), net of tax:	'	'	'
Change in net unrealized gains (losses) on available-for-sale securities	-11,241	3,343	7,159
Reclassification adjustment for gains on available-for-sale securities	-167	-1,740	-1,062
Net change in unrealized gains (losses) on hedging transactions	459	-1,059	-3,665
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	1,707	2,792	-4,659
Cumulative translation adjustment, net	34	-1,940	-1,026
Other comprehensive income (loss)	-9,208	1,396	-3,253
Total comprehensive income	$621,180	$488,932	$526,826

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Mar. 29, 2014	Mar. 30, 2013
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$973,677	$623,558
Short-term investments	1,483,644	1,091,187
Accounts receivable, net of allowances for doubtful accounts and customer returns of $3,355 and $3,425 in 2014 and 2013, respectively	267,833	229,175
Inventories	233,999	201,250
Deferred tax assets	56,166	60,709
Prepaid expenses and other current assets	51,828	91,760
Total current assets	3,067,147	2,297,639
Property, plant and equipment, at cost:	'	'
Land	93,701	93,701
Buildings	311,411	303,958
Machinery and equipment	358,193	340,402
Furniture and fixtures	46,725	46,735
Gross property, plant and equipment	810,030	784,796
Accumulated depreciation and amortization	-454,941	-419,109
Net property, plant and equipment	355,089	365,687
Long-term investments	1,190,775	1,651,033
Goodwill	159,296	158,990
Acquisition-related intangibles, net	28,867	36,054
Other assets	236,175	220,048
Total Assets	5,037,349	4,729,451
Current liabilities:	'	'
Accounts payable	149,695	72,766
Accrued payroll and related liabilities	157,373	124,195
Income taxes payable	12,936	60,632
Deferred income on shipments to distributors	55,099	53,358
Other accrued liabilities	49,256	75,837
Long-term Debt, Current Maturities	565,001	0
Total current liabilities	989,360	386,788
Long-term Debt, Excluding Current Maturities	993,870	922,666
Deferred tax liabilities	253,433	415,442
Long-term income taxes payable	11,470	37,579
Other long-term liabilities	1,535	3,680
Commitments and contingencies	'	'
Temporary Equity, Carrying Amount, Attributable to Parent	34,999	0
Stockholders' equity:	'	'
Preferred stock, $.01 par value; 2,000 shares authorized; none issued and outstanding	0	0
Common stock, $.01 par value; 2,000,000 shares authorized; 268,637 and 263,649 shares issued and outstanding in 2014 and 2013, respectively	2,686	2,636
Additional paid-in capital	805,073	1,276,278
Retained earnings	1,945,471	1,675,722
Accumulated other comprehensive income (loss)	-548	8,660
Total stockholders’ equity	2,752,682	2,963,296
Total Liabilities, Temporary Equity and Stockholders’ Equity	$5,037,349	$4,729,451

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 29, 2014	Mar. 30, 2013
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]	'	'
Allowance for doubtful accounts	$3,355	$3,425
Preferred stock, par value	$0.01	$0.01
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	2,000,000,000	2,000,000,000
Common stock, shares issued	268,637,000	263,649,000
Common stock, shares outstanding	268,637,000	263,649,000

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Cash flows from operating activities:	'	'	'
Net income	$630,388	$487,536	$530,079
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Depreciation	55,464	56,327	55,658
Amortization	19,808	17,233	16,690
Stock-based compensation	94,314	77,862	67,418
Loss on Extinguishment of Debt	9,848	0	0
Net (gain) loss on sale of available-for-sale securities	332	-2,815	-2,515
Amortization of debt discount on convertible debentures	16,319	15,880	15,545
Provision (benefit) for deferred income taxes	53,854	-44,100	79,326
Excess tax benefit from stock-based compensation	-30,754	-10,156	-11,957
Others	-1,618	2,779	44
Changes in assets and liabilities:	'	'	'
Accounts receivable, net	-38,658	-14,210	71,499
Inventories	-32,333	3,889	60,121
Prepaid expenses and other current assets	-4,754	5,000	-7,401
Other assets	-21,335	-13,932	1,427
Accounts payable	76,929	-5,846	-20,640
Accrued liabilities (including restructuring activities)	19,659	-2,319	14,198
Income taxes payable	-44,287	97,053	-9,992
Deferred income on shipments to distributors	1,741	-13,644	-32,761
Net cash provided by operating activities	804,917	656,537	826,739
Cash flows from investing activities:	'	'	'
Purchases of available-for-sale securities	-3,843,395	-3,910,398	-4,333,508
Proceeds from sale and maturity of available-for-sale securities	3,900,858	3,514,224	3,481,501
Purchases of property, plant and equipment	-44,865	-30,265	-70,071
Other investing activities	16,048	-85,076	-38,819
Net cash provided by (used in) investing activities	28,646	-511,515	-960,897
Cash flows from financing activities:	'	'	'
Repayments of Convertible Debt	-1,234,086	0	0
Cash Payments For Repurchase Of Common Stock	241,076	197,689	219,638
Proceeds from issuance of common stock through various stock plans, net	238,158	107,716	108,663
Payment of dividends to stockholders	-267,343	-230,469	-200,361
Proceeds from Issuance of Long-term Debt	'	0	0
Excess tax benefit from stock-based compensation	30,754	10,156	11,957
Net cash used in financing activities	-483,444	-310,286	-299,379
Net increase (decrease) in cash and cash equivalents	350,119	-165,264	-433,537
Cash and cash equivalents at beginning of period	623,558	788,822	1,222,359
Cash and cash equivalents at end of period	973,677	623,558	788,822
Supplemental disclosure of cash flow information:	'	'	'
Interest paid	36,847	37,301	37,301
Income taxes paid (refunded), net	$68,215	$6,975	($2,447)

Consolidated_Statements_of_Sto

Consolidated Statements of Stockholders' Equity (USD $)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
In Thousands, unless otherwise specified
Total stockholders' equity, beginning balance at Apr. 02, 2011	$2,414,617	$2,646	$1,163,410	$1,238,044	$10,517
Common stock, shares outstanding, beginning balance at Apr. 02, 2011	'	264,602	'	'	'
Components of comprehensive income:	'	'	'	'	'
Net income	530,079	'	'	530,079	'
Other comprehensive income (loss)	-3,253	'	'	'	-3,253
Total comprehensive income	526,826	'	'	'	'
Issuance of common shares under employee stock plans, Shares	'	6,040	'	'	'
Issuance of common shares under employee stock plans, Value	108,663	61	108,602	'	'
Repurchase and retirement of common stock, Shares	'	-7,030	'	'	'
Repurchase and retirement of common stock, Value	-219,638	-71	-154,132	-65,435	'
Stock-based compensation expense	67,418	'	67,418	'	'
Stock-based compensation capitalized in inventory	242	'	242	'	'
Cash dividends declared	-200,361	'	'	-200,361	'
Tax benefit from stock-based compensation	9,918	'	9,918	'	'
Total stockholders' equity, ending balance at Mar. 31, 2012	2,707,685	2,636	1,195,458	1,502,327	7,264
Common stock, shares outstanding, ending balance at Mar. 31, 2012	'	263,612	'	'	'
Components of comprehensive income:	'	'	'	'	'
Net income	487,536	'	'	487,536	'
Other comprehensive income (loss)	1,396	'	'	'	1,396
Total comprehensive income	488,932	'	'	'	'
Issuance of common shares under employee stock plans, Shares	'	6,191	'	'	'
Issuance of common shares under employee stock plans, Value	107,716	61	107,655	'	'
Repurchase and retirement of common stock, Shares	'	-6,154	'	'	'
Repurchase and retirement of common stock, Value	-197,689	-61	-113,956	-83,672	'
Stock-based compensation expense	77,862	'	77,862	'	'
Stock-based compensation capitalized in inventory	275	'	275	'	'
Cash dividends declared	-230,469	'	'	-230,469	'
Tax benefit from stock-based compensation	8,984	'	8,984	'	'
Total stockholders' equity, ending balance at Mar. 30, 2013	2,963,296	2,636	1,276,278	1,675,722	8,660
Common stock, shares outstanding, ending balance at Mar. 30, 2013	263,649	263,649	'	'	'
Components of comprehensive income:	'	'	'	'	'
Net income	630,388	'	'	'	'
Other comprehensive income (loss)	-9,208	'	'	'	-9,208
Total comprehensive income	621,180	'	'	'	'
Issuance of common shares under employee stock plans, Shares	'	10,124	'	'	'
Issuance of common shares under employee stock plans, Value	238,158	101	238,057	'	'
Repurchase and retirement of common stock, Shares	'	-5,136	'	'	'
Repurchase and retirement of common stock, Value	'	-51	-148,747	-93,296	'
Payments for Repurchase of Common Stock	242,094	'	'	'	'
Stock-based compensation expense	94,314	'	94,314	'	'
Stock-based compensation capitalized in inventory	416	'	416	'	'
Temporary equity reclassification	'	'	-34,999	'	'
Extinguishment of Debt, Amount	'	'	-646,650	'	'
Cash dividends declared	-267,343	'	'	-267,343	'
Tax benefit from stock-based compensation	26,404	'	26,404	'	'
Total stockholders' equity, ending balance at Mar. 29, 2014	$2,752,682	$2,686	$805,073	$1,945,471	($548)
Common stock, shares outstanding, ending balance at Mar. 29, 2014	268,637	268,637	'	'	'

Consolidated_Statements_of_Sto1

Consolidated Statements of Stockholders' Equity (Parenthetical) (Retained Earnings [Member], USD $)	12 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Cash dividends per share (in dollars per share)	$1	$0.88	$0.76

Nature_of_Operations

Nature of Operations	12 Months Ended
	Mar. 29, 2014
Nature of Operations [Abstract]	'
Nature of Operations	'
	Nature of Operations
	Xilinx, Inc. (Xilinx or the Company) designs, develops and markets programmable devices and associated technologies, including advanced ICs in the form of PLDs, software design tools and predefined system functions delivered as IP. In addition to its programmable platforms, the Company provides design services, customer training, field engineering and technical support. The wafers used to manufacture its products are obtained primarily from independent wafer manufacturers located in Taiwan and Korea. The Company is dependent on these foundries to produce and deliver silicon wafers on a timely basis. The Company is also dependent on subcontractors, primarily located in the Asia Pacific region, to provide semiconductor assembly, test and shipment services. Xilinx is a global company with sales offices throughout the world. The Company derives over one-half of its revenues from international sales, primarily in the Asia Pacific region, Europe and Japan.

Summary_of_Significant_Account

Summary of Significant Accounting Policies and Concentrations of Risk	12 Months Ended
	Mar. 29, 2014
Summary of Significant Accounting Policies and Concentrations of Risk [Abstract]	'
Summary of Significant Accounting Policies and Concentrations of Risk	'
	Summary of Significant Accounting Policies and Concentrations of Risk
	Basis of Presentation
	The accompanying consolidated financial statements include the accounts of Xilinx and its wholly-owned subsidiaries after elimination of all intercompany transactions. The Company uses a 52- to 53-week fiscal year ending on the Saturday nearest March 31. Fiscal 2014, 2013 and 2012 were 52-week years ended on March 29, 2014, March 30, 2013 and March 31, 2012, respectively. Fiscal 2015 will be a 52-week year ending on March 28, 2015.
	Use of Estimates
	The preparation of financial statements in conformity with accounting principles generally accepted in the U.S. requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent liabilities at the date of the financial statements and the reported amounts of net revenues and expenses during the reporting period. Such estimates relate to, among others, the useful lives of assets, assessment of recoverability of property, plant and equipment, long-lived assets including acquisition-related intangible assets and goodwill, inventory write-downs, allowances for doubtful accounts, customer returns, deferred tax assets, stock-based compensation, potential reserves relating to litigation and tax matters, valuation of certain investments and derivative financial instruments as well as other accruals or reserves. Actual results may differ from those estimates and such differences may be material to the financial statements.
	Cash Equivalents and Investments
	Cash equivalents consist of highly liquid investments with original maturities from the date of purchase of three months or less. These investments consist of non-financial institution securities, U.S. and foreign government and agency securities, money market funds, and financial institution securities. Short-term investments consist of U.S. and foreign government and agency securities, mortgage-backed securities, financial institution securities, non-financial institution securities, a debt mutual fund and municipal bonds with original maturities greater than three months and remaining maturities less than one year from the balance sheet date. Long-term investments consist of mortgage-backed securities, non-financial institution securities, a debt mutual fund, U.S. government and agency securities, auction rate securities and municipal bonds with remaining maturities greater than one year, unless the investments are specifically identified to fund current operations, in which case they are classified as short-term investments. As of March 29, 2014 and March 30, 2013, long-term investments also included approximately $20.2 million and $28.7 million, respectively, of auction rate securities that experienced failed auctions in the fourth quarter of fiscal 2008. These auction rate securities are secured primarily by pools of student loans originated under Federal Family Education Loan Program (FFELP) that are substantially guaranteed by the U. S. Department of Education. Equity investments are also classified as long-term investments since they are not intended to fund current operations.
	The Company maintains its cash balances with various banks with high quality ratings, and with investment banking and asset management institutions. The Company manages its liquidity risk by investing in a variety of money market funds, high-grade commercial paper, corporate bonds, municipal bonds, U.S. and foreign government and agency securities and debt mutual funds. This diversification of investments is consistent with its policy to maintain liquidity and ensure the ability to collect principal. The Company maintains an offshore investment portfolio denominated in U.S. dollars. All investments are made pursuant to corporate investment policy guidelines. Investments include Euro commercial paper, Euro dollar bonds, Euro dollar floating rate notes, offshore time deposits, U.S. and foreign government and agency securities, and mortgage-backed securities issued by U.S. government-sponsored enterprises and agencies.
	Management classifies investments as available-for-sale or held-to-maturity at the time of purchase and re-evaluates such designation at each balance sheet date, although classification is not generally changed. Securities are classified as held-to-maturity when the Company has the positive intent and the ability to hold the securities until maturity. Held-to-maturity securities are carried at cost adjusted for amortization of premiums and accretion of discounts to maturity. Such amortization, as well as any interest on the securities, is included in interest income. No investments were classified as held-to-maturity as of March 29, 2014 or March 30, 2013. Available-for-sale securities are carried at fair value with the unrealized gains or losses, net of tax, included as a component of accumulated other comprehensive income (loss) in stockholders’ equity. See "Note 3. Fair Value Measurements" for information relating to the determination of fair value. Realized gains and losses on available-for-sale securities are included in interest and other expense, net, and declines in value judged to be other than temporary are included in impairment loss on investments. The cost of securities matured or sold is based on the specific identification method.
	In determining whether a decline in value of non-marketable equity investments in private companies is other than temporary, the assessment is made by considering available evidence including the general market conditions in the investee’s industry, the investee’s product development status, the investee’s ability to meet business milestones and the financial condition and near-term prospects of the individual investee, including the rate at which the investee is using its cash, the investee’s need for possible additional funding at a lower valuation and bona fide offers to purchase the investee from a prospective acquirer. When a decline in value is deemed to be other than temporary, the Company recognizes an impairment loss in the current period’s operating results to the extent of the decline.
	Accounts Receivable
	The allowance for doubtful accounts reflects the Company’s best estimate of probable losses inherent in the accounts receivable balance. The Company determines the allowance based on the aging of Xilinx’s accounts receivable, historical experience, known troubled accounts, management judgment and other currently available evidence. Xilinx writes off accounts receivable against the allowance when Xilinx determines a balance is uncollectible and no longer actively pursues collection of the receivable. The amounts of accounts receivable written off were insignificant for all periods presented.
	Inventories
	Inventories are stated at the lower of actual cost (determined using the first-in, first-out method), or market (estimated net realizable value) and are comprised of the following:
	(In thousands)	29-Mar-14		30-Mar-13
	Raw materials	$	15,306	$	12,484
	Work-in-process	192,067		165,034
	Finished goods	26,626		23,732
		$	233,999	$	201,250
	The Company reviews and sets standard costs quarterly to approximate current actual manufacturing costs. The Company’s manufacturing overhead standards for product costs are calculated assuming full absorption of actual spending over actual volumes, adjusted for excess capacity. Given the cyclicality of the market, the obsolescence of technology and product lifecycles, the Company writes down inventory based on forecasted demand and technological obsolescence. These forecasts are developed based on inputs from the Company’s customers, including bookings and extended but uncommitted demand forecasts, and internal analyses such as customer historical purchasing trends and actual and anticipated design wins, as well as market and economic conditions, technology changes, new product introductions and changes in strategic direction. These factors require estimates that may include uncertain elements. The estimates of future demand that the Company uses in the valuation of inventory are the basis for its published revenue forecasts, which are also consistent with our short-term manufacturing plans. The differences between the Company’s demand forecast and the actual demand in the recent past have not resulted in any material write down in the Company’s inventory. If the Company’s demand forecast for specific products is greater than actual demand and the Company fails to reduce manufacturing output accordingly, the Company could be required to write down additional inventory, which would have a negative impact on the Company’s gross margin.
	Property, Plant and Equipment
	Property, plant and equipment are recorded at cost, net of accumulated depreciation. Depreciation for financial reporting purposes is computed using the straight-line method over the estimated useful lives of the assets of three to five years for machinery, equipment, furniture and fixtures and 15 to 30 years for buildings. Depreciation expense totaled $55.5 million, $56.3 million and $55.7 million for fiscal 2014, 2013 and 2012, respectively.
	Impairment of Long-Lived Assets Including Acquisition-Related Intangibles
	The Company evaluates the carrying value of long-lived assets and certain identifiable intangible assets to be held and used for impairment if indicators of potential impairment exist. Impairment indicators are reviewed on a quarterly basis. When indicators of impairment exist and assets are held for use, the Company estimates future undiscounted cash flows attributable to the assets. In the event such cash flows are not expected to be sufficient to recover the recorded value of the assets, the assets are written down to their estimated fair values based on the expected discounted future cash flows attributable to the assets or based on appraisals. When assets are removed from operations and held for sale, Xilinx estimates impairment losses as the excess of the carrying value of the assets over their fair value.
	Goodwill
	Goodwill is not amortized but is subject to impairment tests on an annual basis, or more frequently if indicators of potential impairment exist, using a fair-value-based approach. Based on the impairment review performed during the fourth quarter of fiscal 2014, there was no impairment of goodwill in fiscal 2014. Unless there are indicators of impairment, the Company’s next impairment review for goodwill will be performed and completed in the fourth quarter of fiscal 2015. To date, no impairment indicators have been identified.
	Revenue Recognition
	Sales to distributors are made under agreements providing distributor price adjustments and rights of return under certain circumstances. Revenue and costs relating to distributor sales are deferred until products are sold by the distributors to the distributors’ end customers. For fiscal 2014, approximately 56% of the Company’s net revenues were from products sold to distributors for subsequent resale to OEMs or their subcontract manufacturers. Revenue recognition depends on notification from the distributor that product has been sold to the distributor’s end customer. Also reported by the distributor are product resale price, quantity and end customer shipment information, as well as inventory on hand. Reported distributor inventory on hand is reconciled to deferred revenue balances monthly. The Company maintains system controls to validate distributor data and to verify that the reported information is accurate. Deferred income on shipments to distributors reflects the estimated effects of distributor price adjustments and the amount of gross margin expected to be realized when distributors sell through product purchased from the Company. Accounts receivable from distributors are recognized and inventory is relieved when title to inventories transfers, typically upon shipment from Xilinx at which point the Company has a legally enforceable right to collection under normal payment terms.
	As of March 29, 2014, the Company had $75.2 million of deferred revenue and $20.1 million of deferred cost of revenues recognized as a net $55.1 million of deferred income on shipments to distributors. As of March 30, 2013, the Company had $71.3 million of deferred revenue and $17.9 million of deferred cost of revenues recognized as a net $53.4 million of deferred income on shipments to distributors. The deferred income on shipments to distributors that will ultimately be recognized in the Company’s consolidated statement of income will be different than the amount shown on the consolidated balance sheet due to actual price adjustments issued to the distributors when the product is sold to their end customers.
	Revenue from sales to the Company’s direct customers is recognized upon shipment provided that persuasive evidence of a sales arrangement exists, the price is fixed, title has transferred, collection of resulting receivables is reasonably assured, and there are no customer acceptance requirements and no remaining significant obligations. For each of the periods presented, there were no significant formal acceptance provisions with the Company’s direct customers.
	Revenue from software licenses is deferred and recognized as revenue over the term of the licenses of one year. Revenue from support services is recognized when the service is performed. Revenue from Support Products, which includes software and services sales, was less than 5% of net revenues for all of the periods presented.
	Allowances for end customer sales returns are recorded based on historical experience and for known pending customer returns or allowances.
	Foreign Currency Translation
	The U.S. dollar is the functional currency for the Company’s Ireland and Singapore subsidiaries. Monetary assets and liabilities that are not denominated in the functional currency are remeasured into U.S. dollars, and the resulting gains or losses are included in the consolidated statements of income under interest and other expense, net. The remeasurement gains or losses were immaterial for all fiscal periods presented.
	The local currency is the functional currency for each of the Company’s other wholly-owned foreign subsidiaries. Assets and liabilities are translated from foreign currencies into U.S. dollars at month-end exchange rates and statements of income are translated at the average monthly exchange rates. Exchange gains or losses arising from translation of foreign currency denominated assets and liabilities (i.e., cumulative translation adjustment) are included as a component of accumulated other comprehensive income (loss) in stockholders’ equity.
	Derivative Financial Instruments
	To reduce financial risk, the Company periodically enters into financial arrangements as part of the Company’s ongoing asset and liability management activities. Xilinx uses derivative financial instruments to hedge fair values of underlying assets and liabilities or future cash flows which are exposed to foreign currency or commodity price fluctuations. The Company does not enter into derivative financial instruments for trading or speculative purposes. See "Note 5. Derivative Financial Instruments" for detailed information about the Company’s derivative financial instruments.
	Research and Development Expenses
	Research and development costs are current period expenses and charged to expense as incurred.
	Stock-Based Compensation
	The Company has equity incentive plans that are more fully discussed in "Note 6. Stock-Based Compensation Plans." The authoritative guidance of accounting for share-based payment requires the Company to measure the cost of all employee equity awards that are expected to be exercised based on the grant-date fair value of those awards and to record that cost as compensation expense over the period during which the employee is required to perform service in exchange for the award (over the vesting period of the award). In addition, the Company is required to record compensation expense (as previous awards continue to vest) for the unvested portion of previously granted awards that remain outstanding at the date of adoption. The authoritative guidance of accounting for share-based payment requires cash flows resulting from excess tax benefits to be classified as a part of cash flows from financing activities. Excess tax benefits are realized tax benefits from tax deductions for exercised options in excess of the deferred tax asset attributable to stock compensation costs for such options. The exercise price of employee stock options is equal to the market price of Xilinx common stock (defined as the closing trading price reported by The NASDAQ Global Select Market) on the date of grant. Additionally, Xilinx’s employee stock purchase plan is deemed a compensatory plan under the authoritative guidance of accounting for share-based payment. Accordingly, the employee stock purchase plan is included in the computation of stock-based compensation expense.
	The Company uses the straight-line attribution method to recognize stock-based compensation costs over the requisite service period of the award. Upon exercise, cancellation or expiration of stock options, deferred tax assets for options with multiple vesting dates are eliminated for each vesting period on a first-in, first-out basis as if each award had a separate vesting period. To calculate the excess tax benefits available for use in offsetting future tax shortfalls as of the date of implementation, the Company followed the alternative transition method.
	Income Taxes
	All income tax amounts reflect the use of the liability method under the accounting for income taxes, as interpreted by FASB authoritative guidance for measuring uncertain tax positions. Under this method, deferred tax assets and liabilities are determined based on the expected future tax consequences of temporary differences between the carrying amounts of assets and liabilities for financial and income tax reporting purposes.
	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 both fiscal 2014 and 2013, 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.
	Concentrations of Credit Risk
	Avnet, Inc. (Avnet), one of the Company’s distributors, distributes the Company’s products worldwide. As of March 29, 2014 and March 30, 2013, Avnet accounted for 55% and 64% of the Company’s total net accounts receivable, respectively. Resale of product through Avnet accounted for 46%, 46% and 48% of the Company’s worldwide net revenues in fiscal 2014, 2013 and 2012, respectively. The percentage of accounts receivable due from Avnet and the percentage of worldwide net revenues from Avnet are consistent with historical patterns.
	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 any of the periods presented.
	The Company mitigates concentrations of credit risk in its investments in debt securities by currently investing more than 84% 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 March 29, 2014, approximately 34% 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.
	The global credit and capital markets have continued to experience adverse conditions that have negatively impacted the values of various types of investment and non-investment grade securities, and have experienced volatility and disruption due to instability in the global financial system, uncertainty related to global economic conditions and concerns regarding sovereign financial stability. Therefore, there is a risk that the Company may incur other-than-temporary impairment charges for certain types of investments should credit market conditions deteriorate or the underlying assets fail to perform as anticipated. See "Note 4. Financial Instruments" for a table of the Company’s available-for-sale securities.
	Dependence on Independent Manufacturers and Subcontractors
	The Company does not directly manufacture the finished silicon wafers used to manufacture its products. Xilinx receives a majority of its finished wafers from independent wafer manufacturers located in Taiwan. The Company is also dependent on a limited number of subcontractors, primarily located in the Asia Pacific region, to provide semiconductor assembly, test and shipment services.
	Recent Accounting Pronouncements
	Beginning in its fiscal 2014, the Company adopted the authoritative guidance established by the FASB that sets requirements for presentation for significant items reclassified out of the accumulated other comprehensive income (loss) to net income in their entirety during the period, and for items not reclassified to net income in their entirety during the period. This guidance does not affect the underlying accounting for components of other comprehensive income (loss).
	In January 2014, the FASB issued the authoritative guidance that permits reporting entities to make an accounting policy election to account for their investments in qualified affordable housing projects using the proportional amortization method if certain conditions are met. If the conditions are met, the guidance permits an entity to amortize the initial cost of the investment in proportion to the amount of tax credits and the other tax benefits received and recognize the net investment performance in the income statement as a component of income tax. The guidance will be effective for public companies for fiscal years and interim periods within those years beginning after December 15, 2014, which for Xilinx is for its first quarter of fiscal year 2016, and should be applied retrospectively for all periods presented. The Company does not expect this guidance to have significant impact on its consolidated financial statements.

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Mar. 29, 2014
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 fiscal 2014 and the Company did not adjust or override any fair value measurements as of March 29, 2014.
	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. agency securities, foreign government and agency securities, mortgage-backed securities and debt mutual funds. 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 and the embedded derivative related to the Company’s debentures.
	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 March 29, 2014 and March 30, 2013:
			March 29, 2014
	(In thousands)		Quoted			Significant			Significant		Total Fair
			Prices in			Other			Unobservable		Value
			Active			Observable			Inputs
			Markets for			Inputs			(Level 3)
			Identical			(Level 2)
			Instruments
			(Level 1)
	Assets
	Cash and cash equivalents:
	Money market funds		$	213,988		$	—		$	—	$	213,988
	Financial institution securities		—			131,990			—		131,990
	Non-financial institution securities		—			319,970			—		319,970
	U.S. government and agency securities		69,998			—			—		69,998
	Foreign government and agency securities		—			194,984			—		194,984
	Short-term investments:
	Financial institution securities		—			234,916			—		234,916
	Non-financial institution securities		—			226,828			—		226,828
	Municipal bonds		—			15,780			—		15,780
	U.S. government and agency securities		349,023			89,422			—		438,445
	Foreign government and agency securities		—			159,951			—		159,951
	Mortgage-backed securities		—			387,508			—		387,508
	Debt mutual fund		—			20,216			—		20,216
	Long-term investments:
	Non-financial institution securities		—			209,274			—		209,274
	Auction rate securities		—			—			20,160		20,160
	Municipal bonds		—			15,986			—		15,986
	U.S. government and agency securities		4,950			36,126			—		41,076
	Mortgage-backed securities		—			847,581			—		847,581
	Debt mutual fund		—			56,698			—		56,698
	Derivative financial instruments, net		—			1,713			—		1,713
	Total assets measured at fair value		$	637,959		$	2,948,943		$	20,160	$	3,607,062
			30-Mar-13
	(In thousands)		Quoted			Significant			Significant		Total Fair
			Prices in			Other			Unobservable		Value
			Active			Observable			Inputs
			Markets for			Inputs			(Level 3)
			Identical			(Level 2)
			Instruments
			(Level 1)
	Assets
	Cash and cash equivalents:
	Money market funds		$	108,311		$	—		$	—	$	108,311
	Financial institution securities		—			124,988			—		124,988
	Non-financial institution securities		—			163,674			—		163,674
	U.S. government and agency securities		95,039			—			—		95,039
	Foreign government and agency securities		—			54,989			—		54,989
	Short-term investments:
	Financial institution securities		—			179,933			—		179,933
Non-financial institution securities		—			200,670			—		200,670
Municipal Bonds		—			3,706			—		3,706
U.S. government and agency securities		416,887			75,011			—		491,898
Foreign government and agency securities		—			214,912			—		214,912
Mortgage-backed securities		—			68			—		68
Long-term investments:
Non-financial institution securities		—			235,275			—		235,275
Auction rate securities		—			—			28,700		28,700
Municipal bonds		—			21,234			—		21,234
U.S. government and agency securities		55,142			55,143			—		110,285
Mortgage-backed securities		—			1,192,612			—		1,192,612
Debt mutual fund		—			62,927			—		62,927
Total assets measured at fair value		$	675,379		$	2,585,142		$	28,700	$	3,289,221
Liabilities
Derivative financial instruments, net		$	—		$	1,615		$	—	$	1,615
Convertible debentures — embedded derivative		—			—			1,090		1,090
Total liabilities measured at fair value		$	—		$	1,615		$	1,090	$	2,705
Net assets measured at fair value		$	675,379		$	2,583,527		$	27,610	$	3,286,516
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):
		Years Ended
(In thousands)		March 29, 2014			March 30, 2013
Balance as of beginning of period		$	27,610		$	27,998
Total realized and unrealized gains (losses):
Included in interest and other expense, net		1,090			(159		)
Included in other comprehensive income (loss)		1,760			471
Sales and settlements, net (1)		(10,300		)	(700		)
Balance as of end of period		$	20,160		$	27,610
-1	During fiscal 2014 and 2013, the Company redeemed $10.3 million and $700 thousand of student loan auction rate securities, respectively, for cash at par value.
The amount of total gains or (losses) included in net income attributable to the change in unrealized gains or (losses) relating to assets and liabilities still held as of the end of the period are summarized as follows:
(In thousands)		March 29, 2014			March 30, 2013			March 31, 2012
Included in interest and other expense, net		$	—		$	(159	)	$	14
As of March 29, 2014, marketable securities measured at fair value using Level 3 inputs were comprised of $20.2 million of student loan auction rate securities. Auction failures during the fourth quarter of fiscal 2008 and the lack of market activity and liquidity required that the Company’s student loan auction rate securities be measured using observable market data and Level 3 inputs. The fair values of the Company’s student loan auction rate securities were based on the Company’s assessment of the underlying collateral and the creditworthiness of the issuers of the securities. Substantially all of the underlying assets that secure the student loan auction rate securities are pools of student loans originated under FFELP, which are substantially guaranteed by the U.S. Department of Education. The fair values of the Company’s student loan auction rate securities were determined using a discounted cash flow pricing model that incorporated financial inputs such as projected cash flows, discount rates, expected interest rates to be paid to investors and an estimated liquidity discount. The most significant assumptions of the model are the weighted-average life over which cash flows were projected of eight years (given the collateral composition of the securities) and the discount rates ranging from 2.12% to 2.80% that were applied to the pricing model (based on market data and information for comparable- or similar-term student loan asset-backed securities). A hypothetical 20% increase or decrease of the weighted-average life over which cash flows were projected and 100 basis points (one percentage point) increase or decrease in the discount rates would not have a material effect on the fair values of the Company’s student loan auction rate securities. The Company does not intend to sell, nor does it believe it is more likely than not that it would be required to sell, the student loan auction rate securities before anticipated recovery, which could be at final maturity that ranges from June 2043 to May 2047.
The 2037 Convertible Notes, which were redeemed on March 12, 2014 (see "Note 13. Debt and Credit Facility"), included embedded features that qualify as an embedded derivative, and was separately accounted for as a discount on the 2037 Convertible Notes. Its fair value was established at the inception of the 2037 Convertible Notes. Prior to the redemption, each quarter, the change in the fair value of the embedded derivative, if any, was recorded in the consolidated statements of income. The Company used a derivative valuation model to derive the value of the embedded derivative. Key inputs into this valuation model were the Company’s current stock price, risk-free interest rates, the stock dividend yield, the stock volatility and the 2037 Convertible Notes’ credit spread over London Interbank Offered Rate. The first three inputs were based on observable market data and were considered Level 2 inputs while the last two inputs required management judgment and were Level 3 inputs.
Financial Instruments Not Recorded at Fair Value on a Recurring Basis
The Company’s 2017 Convertible Notes, 2019 Notes and 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 March 29, 2014 were approximately $1.12 billion, $498.3 million and $497.8 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	12 Months Ended
	Mar. 29, 2014
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:
		March 29, 2014													30-Mar-13
	(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	$	213,988		$	—		$	—		$	213,988			$	108,311		$	—	$	—		$	108,311
	Financial institution
	securities	366,906			—			—			366,906				304,921			—		—			304,921
	Non-financial institution
	securities	753,888			3,428			(1,244		)	756,072				594,561			5,193		(135		)	599,619
	Auction rate securities	21,500			—			(1,340		)	20,160				31,900			—		(3,200		)	28,700
	Municipal bonds	31,367			604			(205		)	31,766				24,496			514		(70		)	24,940
	U.S. government and
	agency securities	548,568			1,135			(184		)	549,519				696,836			431		(45		)	697,222
	Foreign government and
	agency securities	354,935			—			—			354,935				269,901			—		—			269,901
	Mortgage-backed securities	1,234,237			11,380			(10,528		)	1,235,089				1,180,156			17,601		(5,077		)	1,192,680
	Debt mutual funds	81,350			216			(4,652		)	76,914				61,350			1,577		—			62,927
		$	3,606,739		$	16,763		$	(18,153	)	$	3,605,349			$	3,272,432		$	25,316	$	(8,527	)	$	3,289,221
	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 March 29, 2014 and March 30, 2013:
		March 29, 2014
		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	$	112,470		$	(1,167	)	$	4,488		$	(77	)	$	116,958		$	(1,244	)
	Auction rate securities	—			—			20,160			(1,340		)	20,160			(1,340		)
	Municipal bonds	5,917			(166		)	1,743			(39		)	7,660			(205		)
	U.S. government and
	agency securities	118,125			(184		)	—			—			118,125			(184		)
	Mortgage-backed securities	457,903			(7,225		)	132,376			(3,303		)	590,279			(10,528		)
	Debt mutual fund	56,698			(4,652		)	—			—			56,698			(4,652		)
		$	751,113		$	(13,394	)	$	158,767		$	(4,759	)	$	909,880		$	(18,153	)
		30-Mar-13
		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	$	27,114		$	(135	)	$	—		$	—		$	27,114		$	(135	)
	Auction rate securities	—			—			28,701			(3,200		)	28,701			(3,200		)
	Municipal bonds	8,927			(70		)	60			—			8,987			(70		)
	U.S. government and
	agency securities	388,696			(45		)	—			—			388,696			(45		)
	Mortgage-backed securities	367,561			(4,930		)	11,029			(147		)	378,590			(5,077		)
		$	792,298		$	(5,180	)	$	39,790		$	(3,347	)	$	832,088		$	(8,527	)
	As of March 29, 2014, the gross unrealized losses that had been outstanding for less than twelve months were primarily related to mortgage-backed securities and a debt mutual fund due to the general rising of the interest-rate environment, although the percentage of such losses to the total estimated fair value of the mortgage-backed securities and the debt mutual fund was relatively insignificant. The gross unrealized losses that had been outstanding for more than twelve months were primarily related to mortgage-backed securities, which were primarily due to the general rising of the interest-rate environment, and failed auction rate securities, which were due to adverse conditions in the global credit markets during the past five years.
	The Company reviewed the investment portfolio and determined that the gross unrealized losses on these investments as of March 29, 2014 and March 30, 2013 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 auction rate securities and 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 March 29, 2014 and March 30, 2013. 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 and 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.
		March 29, 2014
	(In thousands)	Amortized			Estimated
		Cost			Fair Value
	Due in one year or less	$	1,614,563		$	1,614,735
	Due after one year through five years	437,854			440,661
	Due after five years through ten years	231,266			232,909
	Due after ten years	1,027,718			1,026,142
		$	3,311,401		$	3,314,447
	As of March 29, 2014, $585.9 million 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:
	(In thousands)	March 29, 2014			March 30, 2013			March 31, 2012
	Gross realized gains on sale of available-for-sale securities	$	2,080		$	3,488		$	2,916
	Gross realized losses on sale of available-for-sale securities	(2,412		)	(673		)	(401		)
	Net realized gains (losses) on sale of available-for-sale securities	$	(332	)	$	2,815		$	2,515
	Amortization of premiums on available-for-sale securities	$	27,293		$	25,123		$	13,302
	The cost of securities matured or sold is based on the specific identification method.

Derivative_Financial_Instrumen

Derivative Financial Instruments	12 Months Ended
	Mar. 29, 2014
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 March 29, 2014 and March 30, 2013, the Company had the following outstanding forward currency exchange contracts (in notional amount), which were derivative financial instruments:
	(In thousands and U.S. dollars)	March 29, 2014			30-Mar-13
	Singapore Dollar	$	60,551		$	70,197
	Euro	46,062			39,865
	Indian Rupee	18,631			16,941
	British Pound	12,056			11,602
	Japanese Yen	9,273			10,891
		$	146,573		$	149,496
	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 2016. The 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 two years.
	As of March 29, 2014, 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 March 29, 2014 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 March 29, 2014 and March 30, 2013, located on the 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
	March 29, 2014	Prepaid expenses and other current assets	$	2,648		Other accrued liabilities	$	935
	30-Mar-13	Prepaid expenses and other current assets	$	1,179		Other accrued liabilities	$	2,794
	The Company does not offset or net the fair value amounts of derivative financial instruments in its consolidated balance sheets. The potential effect of rights of set-off associated with the derivative financial instruments was not material to the Company's consolidated balance sheet for all periods presented.
	The following table summarizes the effect of derivative instruments on the consolidated statements of income for fiscal 2014 and 2013:
		Foreign Exchange Contracts
	(In thousands)	2014			2013
	Amount of gains recognized in other comprehensive income on derivative (effective portion of cash flow hedging)	$	2,167		$	1,734
	Amount of losses reclassified from accumulated other comprehensive income into income (effective portion) *	$	(1,707	)	$	(2,793	)
	Amount of losses recorded (ineffective portion) *	$	(13	)	$	(5	)
	*	Recorded in Interest and Other Expense location within the consolidated statements of income.

StockBased_Compensation_Plans

Stock-Based Compensation Plans	12 Months Ended
	Mar. 29, 2014
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 ESPP:
	(In thousands)	March 29, 2014				March 30, 2013				March 31, 2012
	Stock-based compensation included in:
	Cost of revenues	$	7,602			$	6,356			$	5,630
	Research and development	46,197				37,937				32,310
	Selling, general and administrative	40,515				33,569				29,478
	Stock-based compensation effect on income before taxes	94,314				77,862				67,418
	Income tax effect	(27,327		)		(22,137		)		(19,214		)
	Net stock-based compensation effect on net income	$	66,987			$	55,725			$	48,204
	In accordance with the authoritative guidance on accounting for share-based payments, the Company adjusts stock-based compensation on a quarterly basis for changes to the estimate of expected equity award forfeitures based on actual forfeiture experience. The effect of adjusting the forfeiture rate for all expense amortization was recognized in the period the forfeiture estimate was changed, and was not material for all periods presented.
	As of March 29, 2014 and March 30, 2013, the ending inventory balances included $2.4 million and $2.0 million of capitalized stock-based compensation, respectively. During fiscal 2014, 2013 and 2012, the tax benefit realized for the tax deduction from option exercises and other awards, including amounts credited to additional paid-in capital, totaled $67.0 million, $32.6 million and $31.2 million, respectively.
	The fair values of stock options and stock purchase plan rights under the Company’s equity incentive plans and ESPP were estimated as of the grant date using the Black-Scholes option pricing model. The Company’s expected stock price volatility assumption for stock options is estimated using implied volatility of the Company’s traded options. The expected life of options granted is based on the historical exercise activity as well as the expected disposition of all options outstanding. The expected life of options granted also considers the actual contractual term.
	The Company's stock-based compensation expense relating to options granted during fiscal 2014, 2013, and 2012 were not material.
	The weighted-average fair value per share of stock purchase rights granted under the ESPP during fiscal 2014, 2013 and 2012 were $11.11, $8.61 and $9.42, respectively. These fair values per share were estimated at the date of grant using the following weighted-average assumptions:
		Employee Stock Purchase Plan
		2014			2013			2012
	Expected life of options (years)	1.3			1.3			1.3
	Expected stock price volatility	0.24			0.26			0.29
	Risk-free interest rate	0.2	%		0.2	%		0.2	%
	Dividend yield	2.4	%		2.7	%		2.4	%
	The estimated fair values of restricted stock unit (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 fiscal 2014, 2013 and 2012 were $38.90, $31.58 and $33.69, respectively. The weighted average fair value of RSUs granted in fiscal 2013, 2012 and 2011 were calculated based on estimates at the date of grant using the following weighted-average assumptions:
		2014			2013			2012
	Risk-free interest rate	0.7	%		0.4	%		0.7	%
	Dividend yield	2.5	%		2.7	%		2.2	%
	Options outstanding that have vested and are expected to vest in future periods as of March 29, 2014 are as follows:
	(Shares and intrinsic value in thousands)		Number of Shares			Weighted-Average Exercise Price Per Share		Weighted-Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value (1)
	Vested (i.e., exercisable)		4,935			$24.87		2.2		$	142,968
	Expected to vest		326			$30.36		4.1		$	7,648
	Total vested and expected to vest		5,261			$25.21		2.3		$	150,616
	Total outstanding		5,280			$25.22		2.3		$	151,139
	-1	These amounts represent the difference between the exercise price and $53.84, the closing price per share of Xilinx’s stock on March 29, 2014, for all in-the-money options outstanding.
	Options outstanding that are expected to vest are net of estimated future option forfeitures in accordance with the authoritative guidance of accounting for share-based payment, which are estimated when compensation costs are recognized. Options with a fair value of $4.7 million completed vesting during fiscal 2014. As of March 29, 2014, total unrecognized stock-based compensation costs related to stock options and Employee Stock Purchase Plan were $2.4 million and $20.9 million, respectively. The total unrecognized stock-based compensation cost for stock options and Employee Stock Purchase Plan is expected to be recognized over a weighted-average period of 1.2 years and 1.1 years, respectively.
	Employee Stock Option Plans
	Under the Company’s stock option plans (Option Plans), options reserved for future issuance of common shares to employees and directors of the Company total 20.3 million shares as of March 29, 2014, including 15.0 million shares available for future grants under the 2007 Equity Incentive Plan (2007 Equity Plan). Options to purchase shares of the Company’s common stock under the Option Plans are granted at 100% of the fair market value of the stock on the date of grant. The contractual term for stock awards granted under the 2007 Equity Plan is seven years from the grant date. Prior to April 1, 2007, stock options granted by the Company generally expire ten years from the grant date. Stock awards granted to existing and newly hired employees generally vest over a four-year period from the date of grant.
	A summary of shares available for grant under the 2007 Equity Plan is as follows:
	(Shares in thousands)		Shares Available for Grant
	April 2, 2011		13,164
	Additional shares reserved		4,500
	Stocks options granted		(207	)
	Stock options cancelled		70
	RSUs granted		(2,977	)
	RSUs cancelled		358
	March 31, 2012		14,908
	Additional shares reserved		3,500
	Stocks options granted		(92	)
	Stock options cancelled		209
	RSUs granted		(3,018	)
	RSUs cancelled		483
	March 30, 2013		15,990
	Additional shares reserved		2,000
	Stocks options granted		(8	)
	Stock options cancelled		26
	RSUs granted		(3,297	)
	RSUs cancelled		326
	March 29, 2014		15,037
	The types of awards allowed under the 2007 Equity Plan include incentive stock options, non-qualified stock options, RSUs, restricted stock and stock appreciation rights. To date, the Company has issued a mix of non-qualified stock options and RSUs under the 2007 Equity Plan.
	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
	2-Apr-11	24,969			$	29.11
Granted	207			$	34.79
Exercised	(3,622	)		$	24.7
Forfeited/cancelled/expired	(3,766	)		$	37.35
31-Mar-12	17,788			$	28.32
Granted	92			$	33.83
Exercised	(3,564	)		$	24.68
Forfeited/cancelled/expired	(1,563	)		$	39.54
30-Mar-13	12,753			$	28.01
Granted	8			$	41.08
Exercised	(7,421	)		$	29.95
Forfeited/cancelled/expired	(60	)		$	35.61
March 29, 2014	5,280			$	25.22
Options exercisable at:
March 29, 2014	4,935			$	24.87
March 30, 2013	11,639			$	28.07
The total pre-tax intrinsic value of options exercised during fiscal 2014 and 2013 was $119.6 million and $38.9 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.
Since the Company adopted the policy of retiring all repurchased shares of its common stock, new shares are issued upon employees’ exercise of their stock options.
The following information relates to options outstanding and exercisable under the Option Plans as of March 29, 2014:
		Options Outstanding							Options Exercisable
					Weighted-		Weighted-					Weighted-
(Shares in thousands)					Average		Average					Average
					Remaining		Exercise					Exercise
		Options			Contractual Term		Price Per		Options			Price Per
Range of Exercise Prices		Outstanding			(Years)		Share		Exercisable			Share
$15.95 - $19.79		78			1.97		$18.15		78			$18.15
$20.14 - $29.93		4,766			2.21		$24.46		4,604			$24.41
$30.04 - $38.56		355			4.14		$33.54		180			$32.88
$40.11 - $40.37		81			0.11		$40.11		73			$40.11
		5,280			2.3		$25.22		4,935			$24.87
RSU Awards
A summary of the Company’s RSU activity and related information is as follows:
	RSUs Outstanding
(Shares and intrinsic value in thousands)	Number of Shares			Weighted-Average Grant-Date Fair Value Per Share				Weighted Average Remaining Contractual Term (Years)		Average Intrinsic Value (1)
2-Apr-11	4,215			$	23.19
Granted	2,977			$	33.69
Vested (2)	(1,543	)		$	23.11
Cancelled	(410	)		$	25.18
31-Mar-12	5,239			$	29.01
Granted	3,018			$	31.58
Vested (2)	(1,778	)		$	27.01
Cancelled	(483	)		$	29.69
30-Mar-13	5,996			$	30.83
Granted	3,297			$	38.9
Vested (2)	(2,066	)		$	29.25
Cancelled	(326	)		$	32.28
March 29, 2014	6,901			$	35.08			2.38		$	371,578
Expected to vest as of March 29, 2014	6,339			$	35.22			3.38		$	341,289
-1	Aggregate intrinsic value for RSUs represents the closing price per share of Xilinx’s stock on March 29, 2014 of $53.84, multiplied by the number of RSUs outstanding or expected to vest as of March 29, 2014.
-2	The number of RSUs vested includes shares that the Company withheld on behalf of employees to satisfy the statutory tax withholding requirements.
RSUs with a fair value of $60.4 million were vested during fiscal 2014. As of March 29, 2014, total unrecognized stock-based compensation costs related to non-vested RSUs was $185.1 million. The total unrecognized stock-based compensation cost for RSUs is expected to be recognized over a weighted-average period of 2.6 years.
Employee Stock Purchase Plan
Under the Company’s ESPP, qualified employees can obtain a 24-month purchase right to purchase the Company’s common stock at the end of each six-month exercise period. Participation is limited to 15% of the employee’s annual earnings up to a maximum of $21 thousand in a calendar year. Approximately 78% of all eligible employees participate in the ESPP. The purchase price of the stock is 85% of the lower of the fair market value at the beginning of the 24-month offering period or at the end of each six-month exercise period. Employees purchased 1.2 million shares for $37.9 million in fiscal 2014, 1.3 million shares for $34.5 million in fiscal 2013, and 1.2 million shares for $33.1 million in fiscal 2012. The next scheduled purchase under the ESPP is in the second quarter of fiscal 2015. As of March 29, 2014, 9.7 million shares were available for future issuance out of the 50.5 million shares authorized.

Balance_Sheet_Information

Balance Sheet Information	12 Months Ended
	Mar. 29, 2014
Payables and Accruals [Abstract]	'
Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block]	'
	Balance Sheet Information
	The following tables disclose the current liabilities that individually exceed 5% of the respective consolidated balance sheet amounts in each fiscal year. Individual balances that are less than 5% of the respective consolidated balance sheet amounts are aggregated and disclosed as "other."
	(In thousands)	2014		2013
	Accrued payroll and related liabilities:
	Accrued compensation	$	90,865	$	66,967
	Deferred compensation plan liability	59,569		50,412
	Other	6,939		6,816
		$	157,373	$	124,195

Restructuring_Charges

Restructuring Charges	12 Months Ended
	Mar. 29, 2014
Restructuring Charges [Abstract]	'
Restructuring Charges	'
	Restructuring Charges
	During the second quarter of fiscal 2012, the Company implemented restructuring measures designed to consolidate its research and development activities in the U.S. and to reduce its global workforce by 46 net positions, or less than 2%. The Company completed this restructuring plan and recorded total restructuring charges of $3.4 million in the second quarter of fiscal 2012, which was predominantly related to severance costs and benefits expenses. These charges have been shown separately as restructuring charges on the consolidated statements of income and were paid in full as of March 29, 2014.

Commitments

Commitments	12 Months Ended
	Mar. 29, 2014
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)
	2015	$	5,904
	2016	3,922
	2017	2,214
	2018	1,931
	2019	1,555
	Thereafter	3,500
	Total	$	19,026
	Aggregate future rental income to be received, which includes rents from both owned and leased property, totaled $4.5 million as of March 29, 2014. Rent expense, net of rental income, under all operating leases was $3.1 million for fiscal 2014, $3.9 million for fiscal 2013, and $3.1 million for fiscal 2012. Rental income was not material for fiscal 2014, 2013 or 2012.
	Other commitments as of March 29, 2014 totaled $143.8 million and consisted of purchases of inventory and other non-cancelable purchase obligations related to subcontractors that manufacture silicon wafers and provide assembly and some test services. The Company expects to receive and pay for these materials and services in the next three to six months, as the products meet delivery and quality specifications. As of March 29, 2014, the Company also had $24.5 million of non-cancelable license obligations to providers of electronic design automation software and hardware/software maintenance expiring at various dates through December 2016.
	The Company committed up to $5.0 million to acquire, in the future, rights to intellectual property until July 2023. License payments will be amortized over the useful life of the intellectual property acquired.

Net_Income_Per_Common_Share

Net Income Per Common Share	12 Months Ended
	Mar. 29, 2014
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 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:
	(In thousands, except per share amounts)	2014		2013		2012
	Net income available to common stockholders	$	630,388	$	487,536	$	530,079
	Weighted average common shares outstanding-basic	266,431		261,652		263,783
	Dilutive effect of employee equity incentive plans	4,508		4,146		4,493
	Dilutive effect of 2017 Convertible Notes and warrants	8,544		2,924		1,708
	Dilutive effect of 2037 Convertible Notes	7,913		3,851		2,173
	Weighted average common shares outstanding-diluted	287,396		272,573		272,157
	Basic earnings per common share	$	2.37	$	1.86	$	2.01
	Diluted earnings per common share	$	2.19	$	1.79	$	1.95
	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 13. Debt and Credit Facility" for more discussion of our debt and warrants).
	Outstanding stock options and RSUs under the Company's stock award plans and warrants to purchase approximately 5.1 million, 27.9 million and 30.6 million shares, for fiscal 2014, 2013 or 2012 respectively, were excluded from diluted net income per common share by applying the treasury stock method, as their inclusion would have been antidilutive. These options, RSUs and warrants 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, RSUs and warrants.
	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 counterparties. The call options give the Company the right to purchase up to 20.0 million shares of its common stock at $29.97 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.

Interest_and_Other_Expense_Net

Interest and Other Expense, Net	12 Months Ended
	Mar. 29, 2014
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:
	(In thousands)	March 29, 2014			March 30, 2013			March 31, 2012
	Interest income	$	28,079		$	25,574		$	23,697
	Interest expense	(54,035		)	(55,069		)	(54,576		)
	Other income (expense), net	(3,597		)	(4,231		)	157
		$	(29,553	)	$	(33,726	)	$	(30,722	)

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income	12 Months Ended
	Mar. 29, 2014
Equity [Abstract]	'
Accumulated Other Comprehensive Income (Loss)	'
	Accumulated Other Comprehensive Income (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 income (loss) are as follows:
	(In thousands)	2014			2013
	Accumulated unrealized gains (losses) on available-for-sale securities, net of tax	$	(889	)	$	10,519
	Accumulated unrealized gains (losses) on hedging transactions, net of tax	798			(1,368		)
	Accumulated cumulative translation adjustment, net of tax	(457		)	(491		)
	Accumulated other comprehensive income (loss)	$	(548	)	$	8,660
	The related tax effects of other comprehensive income (loss) were not material for all periods presented.

Debt_and_Credit_Facility

Debt and Credit Facility	12 Months Ended
	Mar. 29, 2014
Debt Disclosure [Abstract]	'
Debt and Credit Facility [Text Block]	'
	Debt and Credit Facility
	2017 Convertible Notes
	As of March 29, 2014, 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 33.3681 shares of common stock per $1 thousand principal amount of the 2017 Convertible Notes, representing an effective conversion price of approximately $29.97 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 March 29, 2014 and as a result, the 2017 Convertible Notes were convertible at the option of the holders. As of March 29, 2014, the 2017 Convertible Notes were classified as a current liability on the Company's 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 would be 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 will be 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 consolidated balance sheets as follows:
	(In thousands)	2014				2013
	Liability component:
	Principal amount of the 2017 Convertible Notes	$	600,000			$	600,000
	Unamortized discount of liability component	(49,223		)		(64,767		)
	Hedge accounting adjustment – sale of interest rate swap	14,224				18,716
	Net carrying value of the 2017 Convertible Notes	$	565,001			$	553,949
	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 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 March 29, 2014, the remaining term of the 2017 Convertible Notes is 3.2 years.
	Interest expense related to the 2017 Convertible Notes was included in interest and other expense, net on the consolidated statements of income as follows:
	(In thousands)	March 29, 2014				March 30, 2013			March 31, 2012
	Contractual coupon interest	$	15,750			$	15,750		$	15,750
	Amortization of debt issuance costs	1,448				1,448			1,448
	Amortization of debt discount, net	11,052				11,052			11,052
	Total interest expense related to the 2017 Convertible Notes	$	28,250			$	28,250		$	28,250
	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 counterparties. The call options give the Company the right to purchase up to 20.0 million shares of its common stock at $29.97 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 counterparties, which give the hedge counterparties the right to purchase up to 20.0 million shares of the Company’s common stock at $42.46 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 lives of the 2019 and 2021 Notes.
	The following table summarizes the carrying value of the 2019 and 2021 Notes as of March 29, 2014.
	(In thousands)		March 29, 2014
	Principal amount of the 2019 Notes		$	500,000
	Unamortized discount of the 2019 Notes		(2,574		)
	Principal amount of the 2021 Notes		500,000
	Unamortized discount of the 2021 Notes		(3,556		)
	Total senior notes		$	993,870
	Interest expense related to the 2019 and 2021 Notes was included in interest and other expense, net on the consolidated statements of income as follows:
	(In thousands)		March 29, 2014
	Contractual coupon interest		$	1,210
	Amortization of debt issuance costs		52
	Amortization of debt discount, net		80
	Total interest expense related to the 2019 and 2021 Notes		$	1,342
	2037 Convertible Notes
	On March 12, 2014, the Company paid $1.23 billion in cash to redeem all of the outstanding $689.6 million (principal amount) of its 2037 Convertible Notes. In accordance with the authoritative guidance for convertible debentures issued by the FASB, the redemption payment was allocated between the liability ($377.6 million) and equity ($856.5 million) components of the convertible debentures, using the equivalent rate that reflected the borrowing rate for a similar non-convertible debt prior to the redemption. As a result, the Company recognized a loss on extinguishment of convertible debentures of $9.8 million, net of the unamortized debt discount ($315.4 million), the write-off of the unamortized debt issuance costs ($5.1 million) and unamortized embedded derivative valuation ($1.3 million).
	Prior to the redemption, interest expense related to the 2037 Convertible Notes was included in interest and other expense, net on the consolidated statements of income, and was recognized as follows:
	(In thousands)	March 29, 2014				March 30, 2013			March 31, 2012
	Contractual coupon interest	$	20,065			$	21,551		$	21,551
	Amortization of debt issuance costs	223				223			223
	Amortization of embedded derivative	58				58			58
	Amortization of debt discount	5,187				4,828			4,493
	Fair value adjustment of embedded derivative	(1,090		)		159			(14		)
	Total interest expense related to the 2037 Convertible Notes	$	24,443			$	26,819		$	26,311
	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 March 29, 2014, the Company had made no borrowings under this credit facility and was not in violation of any of the covenants.

Stockholders_Equity

Stockholders' Equity	12 Months Ended
	Mar. 29, 2014
Stockholders' Equity Note [Abstract]	'
Stockholders' Equity	'
	Stockholders’ Equity
	Preferred Stock
	The Company’s Certificate of Incorporation authorized 2.0 million shares of undesignated preferred stock. The preferred stock may be issued in one or more series. The Board of Directors is authorized to determine or alter the rights, preferences, privileges and restrictions granted to, or imposed upon, any wholly unissued series of preferred stock. As of March 29, 2014 and March 30, 2013, no preferred shares were issued or outstanding.
	Common Stock and Debentures Repurchase Programs
	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. The last approval was the 2012 Repurchase program, which was authorized by the Board in August 2012 to repurchase $750.0 million of the Company’s common stock. The 2012 Repurchase Program has no stated expiration date.
	Through March 29, 2014, the Company has used $252.7 million of the $750.0 million authorized under the 2012 Repurchase Program, leaving $497.3 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 March 29, 2014 and March 30, 2013.
	During fiscal 2014, the Company repurchased 5.2 million shares of common stock in the open market for a total of $242.1 million. During fiscal 2013, the Company repurchased 6.2 million shares of common stock in the open market for a total of $197.7 million.

Income_Taxes

Income Taxes	12 Months Ended
	Mar. 29, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income Taxes
	The provision for income taxes consists of the following:
	(In thousands)	March 29, 2014			March 30, 2013			March 31, 2012
	Federal:
	Current	$	16,692		$	97,108		$	(17,333	)
	Deferred	48,021			(45,465		)	74,911
		64,713			51,643			57,578
	State:
	Current	1,333			1,007			(2,999		)
	Deferred	5,954			1,742			6,591
		7,287			2,749			3,592
	Foreign:
	Current	7,264			5,455			7,978
	Deferred	(126		)	(377		)	(2,176		)
		7,138			5,078			5,802
	Total	$	79,138		$	59,470		$	66,972
	The domestic and foreign components of income before income taxes were as follows:
	(In thousands)	March 29, 2014			March 30, 2013			March 31, 2012
	Domestic	$	83,617		$	45,617		$	74,959
	Foreign	625,909			501,389			522,092
	Income before income taxes	$	709,526		$	547,006		$	597,051
	The tax benefits associated with stock-based compensation recorded in additional paid-in capital were $26.4 million, $9.0 million and $9.9 million, for fiscal 2014, 2013 and 2012, respectively.
	As of March 29, 2014, the Company had federal and state net operating loss carryforwards of approximately $21.7 million. If unused, these carryforwards will expire at various dates through 2030. All of the federal and state net operating loss carryforwards are subject to change of ownership limitations provided by the Internal Revenue Code and similar state provisions. The Company had state research tax credit carryforwards of approximately $136.0 million. The credits have no expiration date. Some of the state credit carryforwards are subject to change of ownership limitations provided by state provisions similar to that of the Internal Revenue Code. The state credit carryforwards include $64.5 million that is not likely to be recovered and has been reduced by a valuation allowance.
	Unremitted foreign earnings that are considered to be permanently invested outside the U.S., and on which no U.S. taxes have been provided, are approximately $2.40 billion as of March 29, 2014. The residual U.S. tax liability, if such amounts were remitted, would be approximately $800.3 million.
	The provision for income taxes reconciles to the amount derived by applying the Federal statutory income tax rate to income before provision for taxes as follows:
	(In thousands)	March 29, 2014			March 30, 2013			March 31, 2012
	Income before provision for taxes	$	709,526		$	547,006		$	597,051
	Federal statutory tax rate	35		%	35		%	35		%
	Computed expected tax	248,334			191,452			208,968
	State taxes, net of federal benefit	4,664			1,787			2,162
	Foreign earnings at lower tax rates	(143,336		)	(107,730		)	(117,013		)
	Tax credits	(23,389		)	(26,305		)	(29,633		)
	Other	(7,135		)	266			2,488
	Provision for income taxes	$	79,138		$	59,470		$	66,972
	The Company has manufacturing operations in Singapore where the Company has been granted "Pioneer Status" that is effective through fiscal 2021. The Pioneer Status reduces the Company’s tax on the majority of Singapore income from 17% to zero. The benefits of Pioneer Status in Singapore for fiscal 2014, fiscal 2013 and fiscal 2012 were approximately $60.3 million ($0.21 per diluted share), $41.0 million ($0.15 per diluted share), and $43.5 million ($0.16 per diluted share), respectively, on income considered permanently reinvested outside the U.S. The tax effect of operations in low tax jurisdictions on the Company’s overall tax rate is reflected in the table above.
	The major components of deferred tax assets and liabilities consisted of the following as of March 29, 2014 and March 30, 2013:
	(In thousands)	2014			2013 (1)
	Deferred tax assets:
	Stock-based compensation	$	21,142		$	27,481
	Deferred income on shipments to distributors	8,097			10,043
	Accrued expenses	26,864			33,859
	Tax credit carryforwards	79,272			62,723
	Intangible and fixed assets	—			11,638
	Deferred compensation plan	22,280			18,769
	Other	13,420			14,948
	Subtotal	171,075			179,461
	Valuation allowance	(43,004		)	(26,401		)
	Total deferred tax assets	128,071			153,060
	Deferred tax liabilities:
	Unremitted foreign earnings	(253,231		)	(244,341		)
	Convertible debt	(4,670		)	(198,943		)
	Other	(5,493		)	(8,181		)
	Total deferred tax liabilities	(263,394		)	(451,465		)
	Total net deferred tax liabilities	$	(135,323	)	$	(298,405	)
	(1) Reclassifications related to the federal impacts of state deferred tax assets and liabilities were made to conform to the current year presentation. There was no impact to net income or the balance sheet for the change in presentation in this prior-year period.
	Long-term deferred tax assets of $61.9 million and $56.4 million as of March 29, 2014 and March 30, 2013, respectively, were included in other assets on the consolidated balance sheet.
	As of March 29, 2014, gross deferred tax assets were offset by valuation allowances of $43.0 million, which were associated with state tax credit carryforwards and foreign net operating loss carryforwards.
	During the year ended March 29, 2014, there was a decrease in long-term deferred tax liabilities of $209.9 million related to the redemption of the Company's 2037 Convertible Notes. See "Loss on Extinguishment of Convertible Debentures" in Management's Discussion and Analysis for further disclosure of the underlying changes.
	The aggregate changes in the balance of gross unrecognized tax benefits for fiscal 2014 and 2013 were as follows:
	(In thousands)	2014			2013
	Balance as of beginning of fiscal year	$	69,957		$	65,038
	Increases in tax positions for prior years	163			2,208
	Decreases in tax positions for prior years	(35,615		)	(4,281		)
Increases in tax positions for current year	3,687			17,660
Settlements	(6,030		)	(44		)
Lapses in statutes of limitation	(5,764		)	(10,624		)
Balance as of end of fiscal year	$	26,398		$	69,957
If the remaining balance of $26.4 million and $70.0 million of unrecognized tax benefits as of March 29, 2014 and March 30, 2013, respectively, were realized in a future period, it would result in a tax benefit of $11.0 million and $32.3 million, respectively, thereby reducing the effective tax rate.
The Company’s policy is to include interest and penalties related to income tax liabilities within the provision for income taxes on the consolidated statements of income. The balances of accrued interest and penalties recorded in the consolidated balance sheets and the amounts of interest and penalties included in the Company’s provisions for income taxes were not material for any period presented.
The Company is no longer subject to U.S. federal audits by taxing authorities for years through fiscal 2010. The Company is no longer subject to U.S. state audits for years through fiscal 2004, except for fiscals 1996 through 2001 which are still open for audit purposes. The Company is no longer subject to tax audits in Ireland for years through fiscal 2009.
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.

Segment_Information

Segment Information	12 Months Ended
	Mar. 29, 2014
Segment Reporting [Abstract]	'
Segment Information	'
	Segment Information
	Xilinx designs, develops and markets programmable logic semiconductor devices and the related software design tools. The Company operates and tracks its results in one operating segment. Xilinx sells its products to OEMs and to electronic components distributors who resell these products to OEMs or subcontract manufacturers.
	Geographic revenue information for fiscal 2014, 2013 and 2012 reflects the geographic location of the distributors or OEMs who purchased the Company’s products. This may differ from the geographic location of the end customers. Long-lived assets include property, plant and equipment, which were based on the physical location of the asset as of the end of each fiscal year.
	Net revenues by geographic region were as follows:
	(In thousands)	29-Mar-14		30-Mar-13		31-Mar-12
	North America:
	United States	$	610,276	$	558,309	$	596,388
	Other	97,416		97,251		88,037
	Total North America	707,692		655,560		684,425
	Asia Pacific:
	China	564,814		428,892		418,036
	Other	375,013		324,920		326,462
	Total Asia Pacific	939,827		753,812		744,498
	Europe	519,829		548,375		589,802
	Japan	215,183		210,905		222,011
	Worldwide total	$	2,382,531	$	2,168,652	$	2,240,736
	Net long-lived assets by country at fiscal year-ends were as follows:
	(In thousands)	2014		2013		2012
	United States	$	237,229	$	240,429	$	254,811
	Foreign:
	Ireland	48,043		50,627		53,255
	Singapore	51,569		56,481		66,806
	Other	18,248		18,150		20,110
	Total foreign	117,860		125,258		140,171
	Worldwide total	$	355,089	$	365,687	$	394,982

Litigation_Settlements_and_Con

Litigation Settlements and Contingencies	12 Months Ended
	Mar. 29, 2014
Loss Contingency [Abstract]	'
Litigation Settlements and Contingencies	'
	Litigation Settlements and Contingencies
	Patent Litigation
	On February 14, 2011, the Company filed a complaint for declaratory judgment of patent non-infringement and invalidity against Intellectual Ventures in the U.S. District Court for the Northern District of California. On September 30, 2011, the Company amended its complaint in this case to eliminate certain defendants and patents from the action (Xilinx, Inc. v. Intellectual Ventures I LLC and Intellectual Ventures II LLC, Case No CV11-0671) (California Case I). The lawsuit pertained to one patent and sought judgment of non-infringement by Xilinx and judgment that the patent is invalid and unenforceable, as well as costs and attorneys’ fees.
	On February 15, 2011, Intellectual Ventures added the Company as a defendant in its complaint for patent infringement previously filed against Altera, Microsemi and Lattice in the U.S. District Court for the District of Delaware (Intellectual Ventures I LLC and Intellectual Ventures II LLC v. Altera Corporation, Microsemi Corporation, Lattice Semiconductor Corporation and Xilinx, Inc., Case No. 10-CV-1065) (Delaware Case). The lawsuit pertained to five patents, four of which we were alleged to be infringing. Intellectual Ventures sought unspecified damages, interest and attorneys’ fees. Altera, Microsemi and Lattice were previously dismissed from the case with prejudice.
	On October 17, 2011, Xilinx filed a complaint for patent non-infringement and invalidity and violation of California Business and Professions Code Section 17200 in the U.S. District Court for the Northern District of California against Intellectual Ventures and related entities as well as additional defendants (Xilinx, Inc. v. Intellectual Ventures, LLC. Intellectual Ventures Management, LLC, Detelle Relay KG, LLC, Roldan Block NY LLC, Latrosse Technologies LLC, TR Technologies Foundation LLC, Taichi Holdings, LLC, Noregin Assets N.V., LLC and Intellectual Venture Funding LLC Case No CV-04407) (California Case II). By order dated January 25, 2012, the Court granted with leave to amend defendants' motion to dismiss our claim for violation of California Business and Professions Code section 17200. The Company amended its complaint to remove the claim for violation of California Business and Professions Code section 17200. The remainder of the lawsuit pertained to two patents and sought judgments of non-infringement by Xilinx and judgments that the patents are invalid and unenforceable, as well as costs and attorneys’ fees.
	On May 1, 2014, the Company entered into a confidential settlement agreement with Intellectual Ventures. Under the terms of the settlement, Intellectual Ventures agreed to dismiss with prejudice all outstanding patent litigation against Xilinx. On May 2, 2014, the U.S. District Court for the Northern District of California dismissed California Case I and California Case II and the U.S. District Court for the District of Delaware dismissed the Delaware Case.
	On November 5, 2012, a patent infringement lawsuit was filed by Mosaid against us in the U.S. District Court for the Eastern District of Texas (Mosaid Technologies Inc. v. Xilinx, Inc., Case No. 6:12-CV-00847). The lawsuit pertains to five patents and Mosaid seeks unspecified damages, costs, fees, royalties and injunctive relief and the proceedings are in their early stages. The Company is unable to estimate our range of possible loss in this matter at this time.
	Litigation Settlement
	On December 19, 2013, the Company entered into a Settlement and License Agreement with PACT XPP Technologies, AG (PACT). Under the settlement, the parties agreed to dismiss with prejudice all outstanding patent litigation between Xilinx, Avnet, Inc. and PACT and Xilinx agreed to pay PACT a lump sum of $33.5 million. In addition, the Company received license rights to all patents owned or controlled by PACT. On December 23, 2013, the trial court dismissed the suit and on December 27, 2013, the court of appeals dismissed the appeal.
	The Company previously recorded charges of $15.4 million in fiscal 2012. Due to the $33.5 million settlement, the Company recorded an additional $9.4 million in fiscal 2014 as a current period charge to the consolidated statements of income. The remainder of the settlement of $8.7 million will be amortized to cost of revenues in subsequent periods.
	Other Matters
	Except as stated above, there are no pending legal proceedings of a material nature to which the Company is a party or of which any of its property is the subject.
	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.

Business_Combination

Business Combination	12 Months Ended
	Mar. 29, 2014
Business Combination [Abstract]	'
Business Combination	'
	Business Combination
	During the second quarter of fiscal 2013, the Company purchased substantially all of the assets and assumed certain liabilities of Modesat Communications, a wireless mobile backhaul solutions company that specializes in the development of microwave modem solutions for the mobile backhaul market. This acquisition aligns with the Company’s strategy to expand its new adjacent markets in communication infrastructure by delivering industry leading wireless backhaul solutions to the Company’s top tier customers. The acquisition was accounted for under the purchase method of accounting. The financial impact of this acquisition was not material to the Company.

Goodwill_and_AcquisitionRelate

Goodwill and Acquisition-Related Intangibles	12 Months Ended
	Mar. 29, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Acquisition-Related Intangibles	'
	Goodwill and Acquisition-Related Intangibles
	As of March 29, 2014 and March 30, 2013, the gross and net amounts of goodwill and of acquisition-related intangibles for all acquisitions were as follows:
								Weighted-Average
	(In thousands)	2014			2013			Amortization Life
	Goodwill	$	159,296		$	158,990
	In-process research and development	$	—		$	—
	Core technology, gross	91,860			89,360			5.7 years
	Less accumulated amortization	(63,267		)	(54,201		)
	Core technology, net	28,593			35,159
	Other intangibles, gross	46,716			46,516			2.7 years
	Less accumulated amortization	(46,442		)	(45,621		)
	Other intangibles, net	274			895
	Total acquisition-related intangibles, gross	138,576			135,876
	Less accumulated amortization	(109,709		)	(99,822		)
	Total acquisition-related intangibles, net	$	28,867		$	36,054
	Amortization expense for acquisition-related intangibles for fiscal 2014, 2013 and 2012 were $9.9 million, $9.5 million and $7.6 million, respectively. Based on the carrying value of acquisition-related intangibles recorded as of March 29, 2014, 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)
	2015	$	9,537
	2016	8,936
	2017	7,131
	2018	2,660
	2019	603
	Total	$	28,867

Employee_Benefit_Plans

Employee Benefit Plans	12 Months Ended
	Mar. 29, 2014
Postemployment Benefits [Abstract]	'
Employee Benefit Plans	'
	Employee Benefit Plans
	Xilinx offers various retirement benefit plans for U.S. and non-U.S. employees. Total contributions to these plans were $13.2 million, $12.2 million and $12.0 million in fiscal 2014, 2013 and 2012, respectively. For employees in the U.S., Xilinx instituted a Company matching program pursuant to which the Company will match contributions to Xilinx’s 401(k) Plan (the 401(k) Plan) based on the amount of salary deferral contributions the participant makes to the 401(k) Plan. Xilinx will match up to 50% of the first 8% of an employee’s compensation that the employee contributed to their 401(k) account. The maximum Company contribution per year is $4,500 per employee. As permitted under Section 401(k) of the Internal Revenue Code, the 401(k) Plan allows tax deferred salary deductions for eligible employees. The Compensation Committee of the Board of Directors administers the 401(k) Plan. Participants in the 401(k) Plan may make salary deferrals of up to 25% of the eligible annual salary, limited by the maximum dollar amount allowed by the Internal Revenue Code. Participants who have reached the age of 50 before the close of the plan year may be eligible to make catch-up salary deferral contributions, up to 25% of eligible annual salary, limited by the maximum dollar amount allowed by the Internal Revenue Code.
	The Company allows its U.S.-based officers, director-level employees and its board members to defer a portion of their compensation under the Deferred Compensation Plan (the Plan). The Compensation Committee administers the Plan. As of March 29, 2014, there were more than 143 participants in the Plan who self-direct their contributions into investment options offered by the Plan. The Plan does not allow Plan participants to invest directly in Xilinx’s stock. In the event Xilinx becomes insolvent, Plan assets are subject to the claims of the Company’s general creditors. There are no Plan provisions that provide for any guarantees or minimum return on investments. As of March 29, 2014, Plan assets were $50.6 million and obligations were $59.6 million. As of March 30, 2013, Plan assets were $43.3 million and obligations were $50.4 million.

Schedule_II_Valuation_and_Qual

Schedule II - Valuation and Qualifying Accounts	12 Months Ended
	Mar. 29, 2014
Valuation and Qualifying Accounts [Abstract]	'
Schedule II - Valuation and Qualifying Accounts	'
	XILINX, INC.
	SCHEDULE II
	VALUATION AND QUALIFYING ACCOUNTS
	(In thousands)
	Description		Beginning		Additions		Deductions(a)		End of Year
			of Year
	For the year ended March 31, 2012:
	Allowance for doubtful accounts		$	3,579	$	180	$	313	$	3,446
	Allowance for deferred tax assets (b)		$	11,814	$	7,635	$	623	$	18,826
	For the year ended March 30, 2013:
	Allowance for doubtful accounts		$	3,446	$	—	$	21	$	3,425
	Allowance for deferred tax assets (b)		$	18,826	$	7,575	$	—	$	26,401
	For the year ended March 29, 2014:
	Allowance for doubtful accounts		$	3,425	$	2	$	72	$	3,355
	Allowance for deferred tax assets		$	26,401	$	19,771	$	3,168	$	43,004
	(a)	Represents amounts written off or released against the allowances accounts.
	(b)	Adjustments for the federal impact of the state allowance for deferred tax assets have been made to conform to the current year presentation as in "Note 15. Income Taxes." There was no impact to net income or the balance sheet for the change in presentation for the prior-year periods.
	Supplementary Financial Data
	Quarterly Data (Unaudited)
	(In thousands, except per share amounts)
	Year ended March 29, 2014 (1)		First		Second		Third		Fourth
			Quarter		Quarter		Quarter		Quarter
	Net revenues		$	578,955	$	598,937	$	586,816	$	617,823
	Gross margin		399,255		416,121		406,024		417,878
	Income before income taxes (2)		182,979		152,765		197,932		175,850
	Net income		157,023		141,461		175,877		156,027
	Net income per common share: (3)
	Basic		$	0.59	$	0.53	$	0.66	$	0.58
	Diluted		$	0.56	$	0.49	$	0.61	$	0.53
	Shares used in per share calculations:
	Basic		264,153		268,478		267,780		268,134
	Diluted		280,291		290,685		288,195		294,536
	Cash dividends declared per common share		$	0.25	$	0.25	$	0.25	$	0.25
	-1	Xilinx uses a 52- to 53-week fiscal year ending on the Saturday nearest March 31. Fiscal 2014 was a 52-week year and each quarter was a 13-week quarter.
	-2	Income before income taxes for the second quarter of fiscal 2014 included litigation and contingencies charge of $28,600, for the third quarter of fiscal 2014 included reversal of litigation and contingencies charge of$19,190 and for the fourth quarter of fiscal 2014 included loss on extinguishment of convertible debentures of $9,848.
	-3	Net income per common share is computed independently for each of the quarters presented. Therefore, the sum of the quarterly per common share information may not equal the annual net income per common share.
	(In thousands, except per share amounts)
	Year ended March 30, 2013 (1)		First		Second		Third		Fourth
			Quarter		Quarter		Quarter		Quarter
	Net revenues		$	582,784	$	543,933	$	509,767	$	532,168
	Gross margin		384,373		356,220		339,274		351,579
	Income before income taxes		154,905		138,083		115,693		138,325
	Net income		129,831		123,437		103,648		130,620
	Net income per common share: (2)
	Basic		$	0.49	$	0.47	$	0.4	$	0.5
	Diluted		$	0.47	$	0.46	$	0.38	$	0.47
	Shares used in per share calculations:
	Basic		263,055		260,605		260,690		263,035
	Diluted		273,820		270,265		271,174		277,090
	Cash dividends declared per common share		$	0.22	$	0.22	$	0.22	$	0.22
	-1	Xilinx uses a 52- to 53-week fiscal year ending on the Saturday nearest March 31. Fiscal 2013 was a 52-week year and each quarter was a 13-week quarter.
	-2	Net income per common share is computed independently for each of the quarters presented. Therefore, the sum of the quarterly per common share information may not equal the annual net income per common share.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies and Concentrations of Risk (Policies)	12 Months Ended
	Mar. 29, 2014
Accounting Policies [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	The accompanying consolidated financial statements include the accounts of Xilinx and its wholly-owned subsidiaries after elimination of all intercompany transactions. The Company uses a 52- to 53-week fiscal year ending on the Saturday nearest March 31. Fiscal 2014, 2013 and 2012 were 52-week years ended on March 29, 2014, March 30, 2013 and March 31, 2012, respectively. Fiscal 2015 will be a 52-week year ending on March 28, 2015.
Use of Estimates	'
	Use of Estimates
	The preparation of financial statements in conformity with accounting principles generally accepted in the U.S. requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent liabilities at the date of the financial statements and the reported amounts of net revenues and expenses during the reporting period. Such estimates relate to, among others, the useful lives of assets, assessment of recoverability of property, plant and equipment, long-lived assets including acquisition-related intangible assets and goodwill, inventory write-downs, allowances for doubtful accounts, customer returns, deferred tax assets, stock-based compensation, potential reserves relating to litigation and tax matters, valuation of certain investments and derivative financial instruments as well as other accruals or reserves. Actual results may differ from those estimates and such differences may be material to the financial statements.
Cash Equivalents and Investments	'
	Cash Equivalents and Investments
	Cash equivalents consist of highly liquid investments with original maturities from the date of purchase of three months or less. These investments consist of non-financial institution securities, U.S. and foreign government and agency securities, money market funds, and financial institution securities. Short-term investments consist of U.S. and foreign government and agency securities, mortgage-backed securities, financial institution securities, non-financial institution securities, a debt mutual fund and municipal bonds with original maturities greater than three months and remaining maturities less than one year from the balance sheet date. Long-term investments consist of mortgage-backed securities, non-financial institution securities, a debt mutual fund, U.S. government and agency securities, auction rate securities and municipal bonds with remaining maturities greater than one year, unless the investments are specifically identified to fund current operations, in which case they are classified as short-term investments. As of March 29, 2014 and March 30, 2013, long-term investments also included approximately $20.2 million and $28.7 million, respectively, of auction rate securities that experienced failed auctions in the fourth quarter of fiscal 2008. These auction rate securities are secured primarily by pools of student loans originated under Federal Family Education Loan Program (FFELP) that are substantially guaranteed by the U. S. Department of Education. Equity investments are also classified as long-term investments since they are not intended to fund current operations.
	The Company maintains its cash balances with various banks with high quality ratings, and with investment banking and asset management institutions. The Company manages its liquidity risk by investing in a variety of money market funds, high-grade commercial paper, corporate bonds, municipal bonds, U.S. and foreign government and agency securities and debt mutual funds. This diversification of investments is consistent with its policy to maintain liquidity and ensure the ability to collect principal. The Company maintains an offshore investment portfolio denominated in U.S. dollars. All investments are made pursuant to corporate investment policy guidelines. Investments include Euro commercial paper, Euro dollar bonds, Euro dollar floating rate notes, offshore time deposits, U.S. and foreign government and agency securities, and mortgage-backed securities issued by U.S. government-sponsored enterprises and agencies.
	Management classifies investments as available-for-sale or held-to-maturity at the time of purchase and re-evaluates such designation at each balance sheet date, although classification is not generally changed. Securities are classified as held-to-maturity when the Company has the positive intent and the ability to hold the securities until maturity. Held-to-maturity securities are carried at cost adjusted for amortization of premiums and accretion of discounts to maturity. Such amortization, as well as any interest on the securities, is included in interest income. No investments were classified as held-to-maturity as of March 29, 2014 or March 30, 2013. Available-for-sale securities are carried at fair value with the unrealized gains or losses, net of tax, included as a component of accumulated other comprehensive income (loss) in stockholders’ equity. See "Note 3. Fair Value Measurements" for information relating to the determination of fair value. Realized gains and losses on available-for-sale securities are included in interest and other expense, net, and declines in value judged to be other than temporary are included in impairment loss on investments. The cost of securities matured or sold is based on the specific identification method.
	In determining whether a decline in value of non-marketable equity investments in private companies is other than temporary, the assessment is made by considering available evidence including the general market conditions in the investee’s industry, the investee’s product development status, the investee’s ability to meet business milestones and the financial condition and near-term prospects of the individual investee, including the rate at which the investee is using its cash, the investee’s need for possible additional funding at a lower valuation and bona fide offers to purchase the investee from a prospective acquirer. When a decline in value is deemed to be other than temporary, the Company recognizes an impairment loss in the current period’s operating results to the extent of the decline.
Accounts Receivable	'
	Accounts Receivable
	The allowance for doubtful accounts reflects the Company’s best estimate of probable losses inherent in the accounts receivable balance. The Company determines the allowance based on the aging of Xilinx’s accounts receivable, historical experience, known troubled accounts, management judgment and other currently available evidence. Xilinx writes off accounts receivable against the allowance when Xilinx determines a balance is uncollectible and no longer actively pursues collection of the receivable. The amounts of accounts receivable written off were insignificant for all periods presented.
Inventories	'
	Inventories
	Inventories are stated at the lower of actual cost (determined using the first-in, first-out method), or market (estimated net realizable value) and are comprised of the following:
	(In thousands)	29-Mar-14		30-Mar-13
	Raw materials	$	15,306	$	12,484
	Work-in-process	192,067		165,034
	Finished goods	26,626		23,732
		$	233,999	$	201,250
	The Company reviews and sets standard costs quarterly to approximate current actual manufacturing costs. The Company’s manufacturing overhead standards for product costs are calculated assuming full absorption of actual spending over actual volumes, adjusted for excess capacity. Given the cyclicality of the market, the obsolescence of technology and product lifecycles, the Company writes down inventory based on forecasted demand and technological obsolescence. These forecasts are developed based on inputs from the Company’s customers, including bookings and extended but uncommitted demand forecasts, and internal analyses such as customer historical purchasing trends and actual and anticipated design wins, as well as market and economic conditions, technology changes, new product introductions and changes in strategic direction. These factors require estimates that may include uncertain elements. The estimates of future demand that the Company uses in the valuation of inventory are the basis for its published revenue forecasts, which are also consistent with our short-term manufacturing plans. The differences between the Company’s demand forecast and the actual demand in the recent past have not resulted in any material write down in the Company’s inventory. If the Company’s demand forecast for specific products is greater than actual demand and the Company fails to reduce manufacturing output accordingly, the Company could be required to write down additional inventory, which would have a negative impact on the Company’s gross margin.
Property, Plant and Equipment	'
	Property, Plant and Equipment
	Property, plant and equipment are recorded at cost, net of accumulated depreciation. Depreciation for financial reporting purposes is computed using the straight-line method over the estimated useful lives of the assets of three to five years for machinery, equipment, furniture and fixtures and 15 to 30 years for buildings. Depreciation expense totaled $55.5 million, $56.3 million and $55.7 million for fiscal 2014, 2013 and 2012, respectively.
Impairment of Long-Lived Assets Including Acquisition-Related Intangibles	'
	Impairment of Long-Lived Assets Including Acquisition-Related Intangibles
	The Company evaluates the carrying value of long-lived assets and certain identifiable intangible assets to be held and used for impairment if indicators of potential impairment exist. Impairment indicators are reviewed on a quarterly basis. When indicators of impairment exist and assets are held for use, the Company estimates future undiscounted cash flows attributable to the assets. In the event such cash flows are not expected to be sufficient to recover the recorded value of the assets, the assets are written down to their estimated fair values based on the expected discounted future cash flows attributable to the assets or based on appraisals. When assets are removed from operations and held for sale, Xilinx estimates impairment losses as the excess of the carrying value of the assets over their fair value.
Goodwill	'
	Goodwill
	Goodwill is not amortized but is subject to impairment tests on an annual basis, or more frequently if indicators of potential impairment exist, using a fair-value-based approach. Based on the impairment review performed during the fourth quarter of fiscal 2014, there was no impairment of goodwill in fiscal 2014. Unless there are indicators of impairment, the Company’s next impairment review for goodwill will be performed and completed in the fourth quarter of fiscal 2015. To date, no impairment indicators have been identified.
Revenue Recognition	'
	Revenue Recognition
	Sales to distributors are made under agreements providing distributor price adjustments and rights of return under certain circumstances. Revenue and costs relating to distributor sales are deferred until products are sold by the distributors to the distributors’ end customers. For fiscal 2014, approximately 56% of the Company’s net revenues were from products sold to distributors for subsequent resale to OEMs or their subcontract manufacturers. Revenue recognition depends on notification from the distributor that product has been sold to the distributor’s end customer. Also reported by the distributor are product resale price, quantity and end customer shipment information, as well as inventory on hand. Reported distributor inventory on hand is reconciled to deferred revenue balances monthly. The Company maintains system controls to validate distributor data and to verify that the reported information is accurate. Deferred income on shipments to distributors reflects the estimated effects of distributor price adjustments and the amount of gross margin expected to be realized when distributors sell through product purchased from the Company. Accounts receivable from distributors are recognized and inventory is relieved when title to inventories transfers, typically upon shipment from Xilinx at which point the Company has a legally enforceable right to collection under normal payment terms.
	As of March 29, 2014, the Company had $75.2 million of deferred revenue and $20.1 million of deferred cost of revenues recognized as a net $55.1 million of deferred income on shipments to distributors. As of March 30, 2013, the Company had $71.3 million of deferred revenue and $17.9 million of deferred cost of revenues recognized as a net $53.4 million of deferred income on shipments to distributors. The deferred income on shipments to distributors that will ultimately be recognized in the Company’s consolidated statement of income will be different than the amount shown on the consolidated balance sheet due to actual price adjustments issued to the distributors when the product is sold to their end customers.
	Revenue from sales to the Company’s direct customers is recognized upon shipment provided that persuasive evidence of a sales arrangement exists, the price is fixed, title has transferred, collection of resulting receivables is reasonably assured, and there are no customer acceptance requirements and no remaining significant obligations. For each of the periods presented, there were no significant formal acceptance provisions with the Company’s direct customers.
	Revenue from software licenses is deferred and recognized as revenue over the term of the licenses of one year. Revenue from support services is recognized when the service is performed. Revenue from Support Products, which includes software and services sales, was less than 5% of net revenues for all of the periods presented.
	Allowances for end customer sales returns are recorded based on historical experience and for known pending customer returns or allowances.
Foreign Currency Translation	'
	Foreign Currency Translation
	The U.S. dollar is the functional currency for the Company’s Ireland and Singapore subsidiaries. Monetary assets and liabilities that are not denominated in the functional currency are remeasured into U.S. dollars, and the resulting gains or losses are included in the consolidated statements of income under interest and other expense, net. The remeasurement gains or losses were immaterial for all fiscal periods presented.
	The local currency is the functional currency for each of the Company’s other wholly-owned foreign subsidiaries. Assets and liabilities are translated from foreign currencies into U.S. dollars at month-end exchange rates and statements of income are translated at the average monthly exchange rates. Exchange gains or losses arising from translation of foreign currency denominated assets and liabilities (i.e., cumulative translation adjustment) are included as a component of accumulated other comprehensive income (loss) in stockholders’ equity.
Derivative Financial Instruments	'
	Derivative Financial Instruments
	To reduce financial risk, the Company periodically enters into financial arrangements as part of the Company’s ongoing asset and liability management activities. Xilinx uses derivative financial instruments to hedge fair values of underlying assets and liabilities or future cash flows which are exposed to foreign currency or commodity price fluctuations. The Company does not enter into derivative financial instruments for trading or speculative purposes. See "Note 5. Derivative Financial Instruments" for detailed information about the Company’s derivative financial instruments.
	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.
Research and Development Expenses	'
	Research and Development Expenses
	Research and development costs are current period expenses and charged to expense as incurred.
Stock-Based Compensation	'
	Stock-Based Compensation
	The Company has equity incentive plans that are more fully discussed in "Note 6. Stock-Based Compensation Plans." The authoritative guidance of accounting for share-based payment requires the Company to measure the cost of all employee equity awards that are expected to be exercised based on the grant-date fair value of those awards and to record that cost as compensation expense over the period during which the employee is required to perform service in exchange for the award (over the vesting period of the award). In addition, the Company is required to record compensation expense (as previous awards continue to vest) for the unvested portion of previously granted awards that remain outstanding at the date of adoption. The authoritative guidance of accounting for share-based payment requires cash flows resulting from excess tax benefits to be classified as a part of cash flows from financing activities. Excess tax benefits are realized tax benefits from tax deductions for exercised options in excess of the deferred tax asset attributable to stock compensation costs for such options. The exercise price of employee stock options is equal to the market price of Xilinx common stock (defined as the closing trading price reported by The NASDAQ Global Select Market) on the date of grant. Additionally, Xilinx’s employee stock purchase plan is deemed a compensatory plan under the authoritative guidance of accounting for share-based payment. Accordingly, the employee stock purchase plan is included in the computation of stock-based compensation expense.
	The Company uses the straight-line attribution method to recognize stock-based compensation costs over the requisite service period of the award. Upon exercise, cancellation or expiration of stock options, deferred tax assets for options with multiple vesting dates are eliminated for each vesting period on a first-in, first-out basis as if each award had a separate vesting period. To calculate the excess tax benefits available for use in offsetting future tax shortfalls as of the date of implementation, the Company followed the alternative transition method.
Income Taxes	'
	Income Taxes
	All income tax amounts reflect the use of the liability method under the accounting for income taxes, as interpreted by FASB authoritative guidance for measuring uncertain tax positions. Under this method, deferred tax assets and liabilities are determined based on the expected future tax consequences of temporary differences between the carrying amounts of assets and liabilities for financial and income tax reporting purposes.
Product Warranty and Indemnification	'
	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 both fiscal 2014 and 2013, 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.

Derivative_Financial_Instrumen1

Derivative Financial Instruments Derivative Financial Instruments (Policies)	12 Months Ended
	Mar. 29, 2014
Accounting Policies [Abstract]	'
Derivatives, Policy [Policy Text Block]	'
	Derivative Financial Instruments
	To reduce financial risk, the Company periodically enters into financial arrangements as part of the Company’s ongoing asset and liability management activities. Xilinx uses derivative financial instruments to hedge fair values of underlying assets and liabilities or future cash flows which are exposed to foreign currency or commodity price fluctuations. The Company does not enter into derivative financial instruments for trading or speculative purposes. See "Note 5. Derivative Financial Instruments" for detailed information about the Company’s derivative financial instruments.
	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.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies and Concentrations of Risk (Tables)	12 Months Ended
	Mar. 29, 2014
Inventory Disclosure [Abstract]	'
Schedule of Inventories	'
	Inventories are stated at the lower of actual cost (determined using the first-in, first-out method), or market (estimated net realizable value) and are comprised of the following:
	(In thousands)	29-Mar-14		30-Mar-13
	Raw materials	$	15,306	$	12,484
	Work-in-process	192,067		165,034
	Finished goods	26,626		23,732
		$	233,999	$	201,250

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Mar. 29, 2014
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 March 29, 2014 and March 30, 2013:
			March 29, 2014
	(In thousands)		Quoted			Significant			Significant		Total Fair
			Prices in			Other			Unobservable		Value
			Active			Observable			Inputs
			Markets for			Inputs			(Level 3)
			Identical			(Level 2)
			Instruments
			(Level 1)
	Assets
	Cash and cash equivalents:
	Money market funds		$	213,988		$	—		$	—	$	213,988
	Financial institution securities		—			131,990			—		131,990
	Non-financial institution securities		—			319,970			—		319,970
	U.S. government and agency securities		69,998			—			—		69,998
	Foreign government and agency securities		—			194,984			—		194,984
	Short-term investments:
	Financial institution securities		—			234,916			—		234,916
	Non-financial institution securities		—			226,828			—		226,828
	Municipal bonds		—			15,780			—		15,780
	U.S. government and agency securities		349,023			89,422			—		438,445
	Foreign government and agency securities		—			159,951			—		159,951
	Mortgage-backed securities		—			387,508			—		387,508
	Debt mutual fund		—			20,216			—		20,216
	Long-term investments:
	Non-financial institution securities		—			209,274			—		209,274
	Auction rate securities		—			—			20,160		20,160
	Municipal bonds		—			15,986			—		15,986
	U.S. government and agency securities		4,950			36,126			—		41,076
	Mortgage-backed securities		—			847,581			—		847,581
	Debt mutual fund		—			56,698			—		56,698
	Derivative financial instruments, net		—			1,713			—		1,713
	Total assets measured at fair value		$	637,959		$	2,948,943		$	20,160	$	3,607,062
			30-Mar-13
	(In thousands)		Quoted			Significant			Significant		Total Fair
			Prices in			Other			Unobservable		Value
			Active			Observable			Inputs
			Markets for			Inputs			(Level 3)
			Identical			(Level 2)
			Instruments
			(Level 1)
	Assets
	Cash and cash equivalents:
	Money market funds		$	108,311		$	—		$	—	$	108,311
	Financial institution securities		—			124,988			—		124,988
	Non-financial institution securities		—			163,674			—		163,674
	U.S. government and agency securities		95,039			—			—		95,039
	Foreign government and agency securities		—			54,989			—		54,989
	Short-term investments:
	Financial institution securities		—			179,933			—		179,933
	Non-financial institution securities		—			200,670			—		200,670
	Municipal Bonds		—			3,706			—		3,706
	U.S. government and agency securities		416,887			75,011			—		491,898
	Foreign government and agency securities		—			214,912			—		214,912
	Mortgage-backed securities		—			68			—		68
	Long-term investments:
	Non-financial institution securities		—			235,275			—		235,275
	Auction rate securities		—			—			28,700		28,700
	Municipal bonds		—			21,234			—		21,234
	U.S. government and agency securities		55,142			55,143			—		110,285
	Mortgage-backed securities		—			1,192,612			—		1,192,612
	Debt mutual fund		—			62,927			—		62,927
	Total assets measured at fair value		$	675,379		$	2,585,142		$	28,700	$	3,289,221
Liabilities
Derivative financial instruments, net		$	—		$	1,615		$	—	$	1,615
Convertible debentures — embedded derivative		—			—			1,090		1,090
Total liabilities measured at fair value		$	—		$	1,615		$	1,090	$	2,705
Net assets measured at fair value		$	675,379		$	2,583,527		$	27,610	$	3,286,516
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):
			Years Ended
	(In thousands)		March 29, 2014			March 30, 2013
	Balance as of beginning of period		$	27,610		$	27,998
	Total realized and unrealized gains (losses):
	Included in interest and other expense, net		1,090			(159		)
	Included in other comprehensive income (loss)		1,760			471
	Sales and settlements, net (1)		(10,300		)	(700		)
	Balance as of end of period		$	20,160		$	27,610
	-1	During fiscal 2014 and 2013, the Company redeemed $10.3 million and $700 thousand of student loan auction rate securities, respectively, for cash at par value.
Gains or (losses) included in net income attributable to change in unrealized gains or losses relating to assets and liabilities	'
	The amount of total gains or (losses) included in net income attributable to the change in unrealized gains or (losses) relating to assets and liabilities still held as of the end of the period are summarized as follows:
	(In thousands)		March 29, 2014			March 30, 2013			March 31, 2012
	Included in interest and other expense, net		$	—		$	(159	)	$	14

Financial_Instruments_Tables

Financial Instruments (Tables)	12 Months Ended
	Mar. 29, 2014
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:
		March 29, 2014													30-Mar-13
	(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	$	213,988		$	—		$	—		$	213,988			$	108,311		$	—	$	—		$	108,311
	Financial institution
	securities	366,906			—			—			366,906				304,921			—		—			304,921
	Non-financial institution
	securities	753,888			3,428			(1,244		)	756,072				594,561			5,193		(135		)	599,619
	Auction rate securities	21,500			—			(1,340		)	20,160				31,900			—		(3,200		)	28,700
	Municipal bonds	31,367			604			(205		)	31,766				24,496			514		(70		)	24,940
	U.S. government and
	agency securities	548,568			1,135			(184		)	549,519				696,836			431		(45		)	697,222
	Foreign government and
	agency securities	354,935			—			—			354,935				269,901			—		—			269,901
	Mortgage-backed securities	1,234,237			11,380			(10,528		)	1,235,089				1,180,156			17,601		(5,077		)	1,192,680
	Debt mutual funds	81,350			216			(4,652		)	76,914				61,350			1,577		—			62,927
		$	3,606,739		$	16,763		$	(18,153	)	$	3,605,349			$	3,272,432		$	25,316	$	(8,527	)	$	3,289,221
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 March 29, 2014 and March 30, 2013:
		March 29, 2014
		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	$	112,470		$	(1,167	)	$	4,488		$	(77	)	$	116,958		$	(1,244	)
	Auction rate securities	—			—			20,160			(1,340		)	20,160			(1,340		)
	Municipal bonds	5,917			(166		)	1,743			(39		)	7,660			(205		)
	U.S. government and
	agency securities	118,125			(184		)	—			—			118,125			(184		)
	Mortgage-backed securities	457,903			(7,225		)	132,376			(3,303		)	590,279			(10,528		)
	Debt mutual fund	56,698			(4,652		)	—			—			56,698			(4,652		)
		$	751,113		$	(13,394	)	$	158,767		$	(4,759	)	$	909,880		$	(18,153	)
		30-Mar-13
		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	$	27,114		$	(135	)	$	—		$	—		$	27,114		$	(135	)
	Auction rate securities	—			—			28,701			(3,200		)	28,701			(3,200		)
	Municipal bonds	8,927			(70		)	60			—			8,987			(70		)
	U.S. government and
	agency securities	388,696			(45		)	—			—			388,696			(45		)
	Mortgage-backed securities	367,561			(4,930		)	11,029			(147		)	378,590			(5,077		)
		$	792,298		$	(5,180	)	$	39,790		$	(3,347	)	$	832,088		$	(8,527	)
Amortized cost and estimated fair value of marketable debt securities	'
		March 29, 2014
	(In thousands)	Amortized			Estimated
		Cost			Fair Value
	Due in one year or less	$	1,614,563		$	1,614,735
	Due after one year through five years	437,854			440,661
	Due after five years through ten years	231,266			232,909
	Due after ten years	1,027,718			1,026,142
		$	3,311,401		$	3,314,447
Information on sale of available-for-sale securities	'
	Certain information related to available-for-sale securities is as follows:
	(In thousands)	March 29, 2014			March 30, 2013			March 31, 2012
	Gross realized gains on sale of available-for-sale securities	$	2,080		$	3,488		$	2,916
	Gross realized losses on sale of available-for-sale securities	(2,412		)	(673		)	(401		)
	Net realized gains (losses) on sale of available-for-sale securities	$	(332	)	$	2,815		$	2,515
	Amortization of premiums on available-for-sale securities	$	27,293		$	25,123		$	13,302

Derivative_Financial_Instrumen2

Derivative Financial Instruments (Tables)	12 Months Ended
	Mar. 29, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Forward currency exchange contracts outstanding	'
	As of March 29, 2014 and March 30, 2013, the Company had the following outstanding forward currency exchange contracts (in notional amount), which were derivative financial instruments:
	(In thousands and U.S. dollars)	March 29, 2014			30-Mar-13
	Singapore Dollar	$	60,551		$	70,197
	Euro	46,062			39,865
	Indian Rupee	18,631			16,941
	British Pound	12,056			11,602
	Japanese Yen	9,273			10,891
		$	146,573		$	149,496
Derivative Instruments Located on Condensed Consolidated Balance Sheet	'
	The Company had the following derivative instruments as of March 29, 2014 and March 30, 2013, located on the 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
	March 29, 2014	Prepaid expenses and other current assets	$	2,648		Other accrued liabilities	$	935
	30-Mar-13	Prepaid expenses and other current assets	$	1,179		Other accrued liabilities	$	2,794
Effect Of Derivative Instruments On Condensed Consolidated Statements Of Income	'
	The following table summarizes the effect of derivative instruments on the consolidated statements of income for fiscal 2014 and 2013:
		Foreign Exchange Contracts
	(In thousands)	2014			2013
	Amount of gains recognized in other comprehensive income on derivative (effective portion of cash flow hedging)	$	2,167		$	1,734
	Amount of losses reclassified from accumulated other comprehensive income into income (effective portion) *	$	(1,707	)	$	(2,793	)
	Amount of losses recorded (ineffective portion) *	$	(13	)	$	(5	)
	*	Recorded in Interest and Other Expense location within the consolidated statements of income.

StockBased_Compensation_Plans_

Stock-Based Compensation Plans (Tables)	12 Months Ended
	Mar. 29, 2014
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 ESPP:
	(In thousands)	March 29, 2014				March 30, 2013				March 31, 2012
	Stock-based compensation included in:
	Cost of revenues	$	7,602			$	6,356			$	5,630
	Research and development	46,197				37,937				32,310
	Selling, general and administrative	40,515				33,569				29,478
	Stock-based compensation effect on income before taxes	94,314				77,862				67,418
	Income tax effect	(27,327		)		(22,137		)		(19,214		)
	Net stock-based compensation effect on net income	$	66,987			$	55,725			$	48,204
Employee stock purchase plan, valuation assumptions	'
	These fair values per share were estimated at the date of grant using the following weighted-average assumptions:
		Employee Stock Purchase Plan
		2014			2013			2012
	Expected life of options (years)	1.3			1.3			1.3
	Expected stock price volatility	0.24			0.26			0.29
	Risk-free interest rate	0.2	%		0.2	%		0.2	%
	Dividend yield	2.4	%		2.7	%		2.4	%
Summary of restricted stock unit activity and related information	'
	The per share weighted-average fair value of RSUs granted during fiscal 2014, 2013 and 2012 were $38.90, $31.58 and $33.69, respectively. The weighted average fair value of RSUs granted in fiscal 2013, 2012 and 2011 were calculated based on estimates at the date of grant using the following weighted-average assumptions:
		2014			2013			2012
	Risk-free interest rate	0.7	%		0.4	%		0.7	%
	Dividend yield	2.5	%		2.7	%		2.2	%
Stock options, vested and expected to vest, outstanding	'
	Options outstanding that have vested and are expected to vest in future periods as of March 29, 2014 are as follows:
	(Shares and intrinsic value in thousands)		Number of Shares			Weighted-Average Exercise Price Per Share		Weighted-Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value (1)
	Vested (i.e., exercisable)		4,935			$24.87		2.2		$	142,968
	Expected to vest		326			$30.36		4.1		$	7,648
	Total vested and expected to vest		5,261			$25.21		2.3		$	150,616
	Total outstanding		5,280			$25.22		2.3		$	151,139
	-1	These amounts represent the difference between the exercise price and $53.84, the closing price per share of Xilinx’s stock on March 29, 2014, for all in-the-money options outstanding.
Shares available for grant under stock option plan	'
	A summary of shares available for grant under the 2007 Equity Plan is as follows:
	(Shares in thousands)		Shares Available for Grant
	April 2, 2011		13,164
	Additional shares reserved		4,500
	Stocks options granted		(207	)
	Stock options cancelled		70
	RSUs granted		(2,977	)
	RSUs cancelled		358
	March 31, 2012		14,908
	Additional shares reserved		3,500
	Stocks options granted		(92	)
	Stock options cancelled		209
	RSUs granted		(3,018	)
	RSUs cancelled		483
	March 30, 2013		15,990
	Additional shares reserved		2,000
	Stocks options granted		(8	)
	Stock options cancelled		26
	RSUs granted		(3,297	)
	RSUs cancelled		326
	March 29, 2014		15,037
Stock options outstanding and exercisable under stock option plans, by exercise price range	'
	The following information relates to options outstanding and exercisable under the Option Plans as of March 29, 2014:
			Options Outstanding							Options Exercisable
						Weighted-		Weighted-					Weighted-
	(Shares in thousands)					Average		Average					Average
						Remaining		Exercise					Exercise
			Options			Contractual Term		Price Per		Options			Price Per
	Range of Exercise Prices		Outstanding			(Years)		Share		Exercisable			Share
	$15.95 - $19.79		78			1.97		$18.15		78			$18.15
	$20.14 - $29.93		4,766			2.21		$24.46		4,604			$24.41
	$30.04 - $38.56		355			4.14		$33.54		180			$32.88
	$40.11 - $40.37		81			0.11		$40.11		73			$40.11
			5,280			2.3		$25.22		4,935			$24.87
Employee Stock Option [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 and intrinsic value in thousands)	Number of Shares			Weighted-Average Grant-Date Fair Value Per Share				Weighted Average Remaining Contractual Term (Years)		Average Intrinsic Value (1)
	2-Apr-11	4,215			$	23.19
	Granted	2,977			$	33.69
	Vested (2)	(1,543	)		$	23.11
	Cancelled	(410	)		$	25.18
	31-Mar-12	5,239			$	29.01
	Granted	3,018			$	31.58
	Vested (2)	(1,778	)		$	27.01
	Cancelled	(483	)		$	29.69
	30-Mar-13	5,996			$	30.83
	Granted	3,297			$	38.9
	Vested (2)	(2,066	)		$	29.25
	Cancelled	(326	)		$	32.28
	March 29, 2014	6,901			$	35.08			2.38		$	371,578
	Expected to vest as of March 29, 2014	6,339			$	35.22			3.38		$	341,289
	-1	Aggregate intrinsic value for RSUs represents the closing price per share of Xilinx’s stock on March 29, 2014 of $53.84, multiplied by the number of RSUs outstanding or expected to vest as of March 29, 2014.
	-2	The number of RSUs vested includes shares that the Company withheld on behalf of employees to satisfy the statutory tax withholding requirements.
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
	2-Apr-11	24,969			$	29.11
	Granted	207			$	34.79
	Exercised	(3,622	)		$	24.7
	Forfeited/cancelled/expired	(3,766	)		$	37.35
	31-Mar-12	17,788			$	28.32
	Granted	92			$	33.83
	Exercised	(3,564	)		$	24.68
	Forfeited/cancelled/expired	(1,563	)		$	39.54
	30-Mar-13	12,753			$	28.01
	Granted	8			$	41.08
	Exercised	(7,421	)		$	29.95
	Forfeited/cancelled/expired	(60	)		$	35.61
	March 29, 2014	5,280			$	25.22
	Options exercisable at:
	March 29, 2014	4,935			$	24.87
	March 30, 2013	11,639			$	28.07

Balance_Sheet_Information_Tabl

Balance Sheet Information (Tables)	12 Months Ended
	Mar. 29, 2014
Payables and Accruals [Abstract]	'
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]	'
	The following tables disclose the current liabilities that individually exceed 5% of the respective consolidated balance sheet amounts in each fiscal year. Individual balances that are less than 5% of the respective consolidated balance sheet amounts are aggregated and disclosed as "other."
	(In thousands)	2014		2013
	Accrued payroll and related liabilities:
	Accrued compensation	$	90,865	$	66,967
	Deferred compensation plan liability	59,569		50,412
	Other	6,939		6,816
		$	157,373	$	124,195

Commitments_Tables

Commitments (Tables)	12 Months Ended
	Mar. 29, 2014
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)
	2015	$	5,904
	2016	3,922
	2017	2,214
	2018	1,931
	2019	1,555
	Thereafter	3,500
	Total	$	19,026

Net_Income_Per_Common_Share_Ea

Net Income Per Common Share Earnings Per Share (Tables)	12 Months Ended
	Mar. 29, 2014
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:
	(In thousands, except per share amounts)	2014		2013		2012
	Net income available to common stockholders	$	630,388	$	487,536	$	530,079
	Weighted average common shares outstanding-basic	266,431		261,652		263,783
	Dilutive effect of employee equity incentive plans	4,508		4,146		4,493
	Dilutive effect of 2017 Convertible Notes and warrants	8,544		2,924		1,708
	Dilutive effect of 2037 Convertible Notes	7,913		3,851		2,173
	Weighted average common shares outstanding-diluted	287,396		272,573		272,157
	Basic earnings per common share	$	2.37	$	1.86	$	2.01
	Diluted earnings per common share	$	2.19	$	1.79	$	1.95

Recovered_Sheet1

Interest And Other Expense, Net (Tables)	12 Months Ended
	Mar. 29, 2014
Other Income and Expenses [Abstract]	'
Components of interest and other expense, net	'
	The components of interest and other expense, net are as follows:
	(In thousands)	March 29, 2014			March 30, 2013			March 31, 2012
	Interest income	$	28,079		$	25,574		$	23,697
	Interest expense	(54,035		)	(55,069		)	(54,576		)
	Other income (expense), net	(3,597		)	(4,231		)	157
		$	(29,553	)	$	(33,726	)	$	(30,722	)

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Mar. 29, 2014
Equity [Abstract]	'
Components of accumulated other comprehensive income (loss)	'
	The components of accumulated other comprehensive income (loss) are as follows:
	(In thousands)	2014			2013
	Accumulated unrealized gains (losses) on available-for-sale securities, net of tax	$	(889	)	$	10,519
	Accumulated unrealized gains (losses) on hedging transactions, net of tax	798			(1,368		)
	Accumulated cumulative translation adjustment, net of tax	(457		)	(491		)
	Accumulated other comprehensive income (loss)	$	(548	)	$	8,660

Debt_and_Credit_Facility_Table

Debt and Credit Facility (Tables)	12 Months Ended
	Mar. 29, 2014
Schedule of Debt Instruments [Line Items]	'
Interest Expense Related to Debentures [Table Text Block]	'
	Prior to the redemption, interest expense related to the 2037 Convertible Notes was included in interest and other expense, net on the consolidated statements of income, and was recognized as follows:
	(In thousands)	March 29, 2014				March 30, 2013			March 31, 2012
	Contractual coupon interest	$	20,065			$	21,551		$	21,551
	Amortization of debt issuance costs	223				223			223
	Amortization of embedded derivative	58				58			58
	Amortization of debt discount	5,187				4,828			4,493
	Fair value adjustment of embedded derivative	(1,090		)		159			(14		)
	Total interest expense related to the 2037 Convertible Notes	$	24,443			$	26,819		$	26,311
Two And Six Two Five Percent Senior Convertible Debentures [Member] | 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 consolidated balance sheets as follows:
	(In thousands)	2014				2013
	Liability component:
	Principal amount of the 2017 Convertible Notes	$	600,000			$	600,000
	Unamortized discount of liability component	(49,223		)		(64,767		)
	Hedge accounting adjustment – sale of interest rate swap	14,224				18,716
	Net carrying value of the 2017 Convertible Notes	$	565,001			$	553,949
	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 consolidated statements of income as follows:
	(In thousands)	March 29, 2014				March 30, 2013			March 31, 2012
	Contractual coupon interest	$	15,750			$	15,750		$	15,750
	Amortization of debt issuance costs	1,448				1,448			1,448
	Amortization of debt discount, net	11,052				11,052			11,052
	Total interest expense related to the 2017 Convertible Notes	$	28,250			$	28,250		$	28,250
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 March 29, 2014.
	(In thousands)		March 29, 2014
	Principal amount of the 2019 Notes		$	500,000
	Unamortized discount of the 2019 Notes		(2,574		)
	Principal amount of the 2021 Notes		500,000
	Unamortized discount of the 2021 Notes		(3,556		)
	Total senior notes		$	993,870
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 consolidated statements of income as follows:
	(In thousands)		March 29, 2014
	Contractual coupon interest		$	1,210
	Amortization of debt issuance costs		52
	Amortization of debt discount, net		80
	Total interest expense related to the 2019 and 2021 Notes		$	1,342

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Mar. 29, 2014
Income Tax Disclosure [Abstract]	'
Schedule of Provision for Income Taxes	'
	The provision for income taxes consists of the following:
	(In thousands)	March 29, 2014			March 30, 2013			March 31, 2012
	Federal:
	Current	$	16,692		$	97,108		$	(17,333	)
	Deferred	48,021			(45,465		)	74,911
		64,713			51,643			57,578
	State:
	Current	1,333			1,007			(2,999		)
	Deferred	5,954			1,742			6,591
		7,287			2,749			3,592
	Foreign:
	Current	7,264			5,455			7,978
	Deferred	(126		)	(377		)	(2,176		)
		7,138			5,078			5,802
	Total	$	79,138		$	59,470		$	66,972
Schedule of Income before Income Tax, Domestic and Foreign	'
	The domestic and foreign components of income before income taxes were as follows:
	(In thousands)	March 29, 2014			March 30, 2013			March 31, 2012
	Domestic	$	83,617		$	45,617		$	74,959
	Foreign	625,909			501,389			522,092
	Income before income taxes	$	709,526		$	547,006		$	597,051
Schedule of Effective Income Tax Rate Reconciliation	'
	The provision for income taxes reconciles to the amount derived by applying the Federal statutory income tax rate to income before provision for taxes as follows:
	(In thousands)	March 29, 2014			March 30, 2013			March 31, 2012
	Income before provision for taxes	$	709,526		$	547,006		$	597,051
	Federal statutory tax rate	35		%	35		%	35		%
	Computed expected tax	248,334			191,452			208,968
	State taxes, net of federal benefit	4,664			1,787			2,162
	Foreign earnings at lower tax rates	(143,336		)	(107,730		)	(117,013		)
	Tax credits	(23,389		)	(26,305		)	(29,633		)
	Other	(7,135		)	266			2,488
	Provision for income taxes	$	79,138		$	59,470		$	66,972
Schedule of Deferred Tax Assets and Liabilities	'
	The major components of deferred tax assets and liabilities consisted of the following as of March 29, 2014 and March 30, 2013:
	(In thousands)	2014			2013 (1)
	Deferred tax assets:
	Stock-based compensation	$	21,142		$	27,481
	Deferred income on shipments to distributors	8,097			10,043
	Accrued expenses	26,864			33,859
	Tax credit carryforwards	79,272			62,723
	Intangible and fixed assets	—			11,638
	Deferred compensation plan	22,280			18,769
	Other	13,420			14,948
	Subtotal	171,075			179,461
	Valuation allowance	(43,004		)	(26,401		)
	Total deferred tax assets	128,071			153,060
	Deferred tax liabilities:
	Unremitted foreign earnings	(253,231		)	(244,341		)
	Convertible debt	(4,670		)	(198,943		)
	Other	(5,493		)	(8,181		)
	Total deferred tax liabilities	(263,394		)	(451,465		)
	Total net deferred tax liabilities	$	(135,323	)	$	(298,405	)
Schedule of Changes to Unrecognized Income Tax Benefits	'
	The aggregate changes in the balance of gross unrecognized tax benefits for fiscal 2014 and 2013 were as follows:
	(In thousands)	2014			2013
	Balance as of beginning of fiscal year	$	69,957		$	65,038
	Increases in tax positions for prior years	163			2,208
	Decreases in tax positions for prior years	(35,615		)	(4,281		)
	Increases in tax positions for current year	3,687			17,660
	Settlements	(6,030		)	(44		)
	Lapses in statutes of limitation	(5,764		)	(10,624		)
	Balance as of end of fiscal year	$	26,398		$	69,957

Segment_Information_Tables

Segment Information (Tables)	12 Months Ended
	Mar. 29, 2014
Segment Reporting [Abstract]	'
Schedule of Segment Reporting Information, by Segment	'
	Net revenues by geographic region were as follows:
	(In thousands)	29-Mar-14		30-Mar-13		31-Mar-12
	North America:
	United States	$	610,276	$	558,309	$	596,388
	Other	97,416		97,251		88,037
	Total North America	707,692		655,560		684,425
	Asia Pacific:
	China	564,814		428,892		418,036
	Other	375,013		324,920		326,462
	Total Asia Pacific	939,827		753,812		744,498
	Europe	519,829		548,375		589,802
	Japan	215,183		210,905		222,011
	Worldwide total	$	2,382,531	$	2,168,652	$	2,240,736
	Net long-lived assets by country at fiscal year-ends were as follows:
	(In thousands)	2014		2013		2012
	United States	$	237,229	$	240,429	$	254,811
	Foreign:
	Ireland	48,043		50,627		53,255
	Singapore	51,569		56,481		66,806
	Other	18,248		18,150		20,110
	Total foreign	117,860		125,258		140,171
	Worldwide total	$	355,089	$	365,687	$	394,982

Goodwill_and_AcquisitionRelate1

Goodwill and Acquisition-Related Intangibles (Tables)	12 Months Ended
	Mar. 29, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Gross and net amounts of goodwill and of acquisition-related intangibles	'
	As of March 29, 2014 and March 30, 2013, the gross and net amounts of goodwill and of acquisition-related intangibles for all acquisitions were as follows:
								Weighted-Average
	(In thousands)	2014			2013			Amortization Life
	Goodwill	$	159,296		$	158,990
	In-process research and development	$	—		$	—
	Core technology, gross	91,860			89,360			5.7 years
	Less accumulated amortization	(63,267		)	(54,201		)
	Core technology, net	28,593			35,159
	Other intangibles, gross	46,716			46,516			2.7 years
	Less accumulated amortization	(46,442		)	(45,621		)
	Other intangibles, net	274			895
	Total acquisition-related intangibles, gross	138,576			135,876
	Less accumulated amortization	(109,709		)	(99,822		)
	Total acquisition-related intangibles, net	$	28,867		$	36,054
Schedule of expected annual amortization expense for acquisition-related intangibles	'
	Based on the carrying value of acquisition-related intangibles recorded as of March 29, 2014, 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)
	2015	$	9,537
	2016	8,936
	2017	7,131
	2018	2,660
	2019	603
	Total	$	28,867

Nature_of_Operations_Details

Nature of Operations (Details) (Asia Pacific, Europe, and Japan [Member], Sales Revenue, Goods, Net [Member], Geographic Concentration Risk [Member])	12 Months Ended
	Mar. 29, 2014
Asia Pacific, Europe, and Japan [Member] | Sales Revenue, Goods, Net [Member] | Geographic Concentration Risk [Member]	'
Concentration Risk [Line Items]	'
Concentration risk, international sales (more than)	50.00%

Summary_of_Significant_Account3

Summary of Significant Accounting Policies and Concentrations of Risk (Investments) (Details) (USD $)	Mar. 29, 2014	Mar. 30, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Long-term investments	$1,190,775	$1,651,033
Auction Rate Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Long-term investments	$20,160	$28,700

Summary_of_Significant_Account4

Summary of Significant Accounting Policies and Concentrations of Risk (Inventory) (Details) (USD $)	Mar. 29, 2014	Mar. 30, 2013
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]	'	'
Raw materials	$15,306	$12,484
Work-in-process	192,067	165,034
Finished goods	26,626	23,732
Total inventories	$233,999	$201,250

Summary_of_Significant_Account5

Summary of Significant Accounting Policies and Concentrations of Risk (PPE) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Property, Plant and Equipment [Line Items]	'	'	'
Depreciation	$55,464	$56,327	$55,658
Machinery, Equipment, Furniture And Fixtures [Member] | Minimum [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, plant and equipment, estimated useful life	'3 years	'	'
Machinery, Equipment, Furniture And Fixtures [Member] | Maximum [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, plant and equipment, estimated useful life	'5 years	'	'
Buildings [Member] | Minimum [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, plant and equipment, estimated useful life	'15 years	'	'
Buildings [Member] | Maximum [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Property, plant and equipment, estimated useful life	'30 years	'	'

Summary_of_Significant_Account6

Summary of Significant Accounting Policies and Concentrations of Risk (Concentrations) (Details)	12 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
	Customer	Customer	Customer
Concentration Risk [Line Items]	'	'	'
Percentage of total accounts receivable accounted from Avnet	55.00%	64.00%	'
Percentage of net revenues through resale of product from Avnet	46.00%	46.00%	48.00%
Number of end customers accounted for net revenues	0	0	0
Percent of Worldwide Net revenues Accounted From End Customer	10.00%	10.00%	10.00%
Percentage of mortgage-backed securities in total investment portfolio	34.00%	'	'
Minimum [Member]	'	'	'
Concentration Risk [Line Items]	'	'	'
Percentage of higher grade securities investment in debt securities (more than)	84.00%	'	'
Sales Revenue, Goods, Net [Member] | Support Products [Member] | Maximum [Member]	'	'	'
Concentration Risk [Line Items]	'	'	'
Concentration risk, revenue (less than)	5.00%	5.00%	5.00%
Auction Rate Securities [Member] | Minimum [Member]	'	'	'
Concentration Risk [Line Items]	'	'	'
Student Loan Auction Rate Securities Maturity Date	'June 2043	'	'
Auction Rate Securities [Member] | Maximum [Member]	'	'	'
Concentration Risk [Line Items]	'	'	'
Student Loan Auction Rate Securities Maturity Date	'May 2047	'	'

Summary_of_Significant_Account7

Summary of Significant Accounting Policies and Concentrations of Risk (Other) (Details) (USD $)	12 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Summary of Significant Accounting Policies and Concentrations of Risk [Abstract]	'	'	'
Percent of Worldwide Net revenues Accounted From End Customer	10.00%	10.00%	10.00%
Held-to-maturity Securities	$0	$0	'
Impairment of goodwill	0	'	'
Percentage of net revenues from products sold to distributors	56.00%	'	'
Deferred revenue	75,200,000	71,300,000	'
Net deferred cost of revenues	20,100,000	17,900,000	'
Deferred income on shipments to distributors	$55,099,000	$53,358,000	'

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (USD $)	Mar. 29, 2014	Mar. 30, 2013
In Thousands, unless otherwise specified
Assets and Liabilities Measured at Fair Value on a Recurring Basis	'	'
Derivative Asset	$1,713	'
Fair Value, Inputs, Level 1 [Member]	'	'
Assets and Liabilities Measured at Fair Value on a Recurring Basis	'	'
Derivative Asset	0	'
Fair Value, Inputs, Level 2 [Member]	'	'
Assets and Liabilities Measured at Fair Value on a Recurring Basis	'	'
Derivative Asset	1,713	'
Fair Value, Inputs, Level 3 [Member]	'	'
Assets and Liabilities Measured at Fair Value on a Recurring Basis	'	'
Derivative Asset	0	'
Fair Value, Measurements, Recurring [Member]	'	'
Assets and Liabilities Measured at Fair Value on a Recurring Basis	'	'
Total assets measured at fair value	3,607,062	3,289,221
Derivative financial instruments, net	'	1,615
Fair Value Liabilities, Convertible debentures - embedded derivative	'	1,090
Total liabilities measured at fair value	'	2,705
Net assets measured at fair value	'	3,286,516
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]	'	'
Assets and Liabilities Measured at Fair Value on a Recurring Basis	'	'
Total assets measured at fair value	637,959	675,379
Derivative financial instruments, net	'	0
Fair Value Liabilities, Convertible debentures - embedded derivative	'	0
Total liabilities measured at fair value	'	0
Net assets measured at fair value	'	675,379
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]	'	'
Assets and Liabilities Measured at Fair Value on a Recurring Basis	'	'
Total assets measured at fair value	2,948,943	2,585,142
Derivative financial instruments, net	'	1,615
Fair Value Liabilities, Convertible debentures - embedded derivative	'	0
Total liabilities measured at fair value	'	1,615
Net assets measured at fair value	'	2,583,527
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]	'	'
Assets and Liabilities Measured at Fair Value on a Recurring Basis	'	'
Total assets measured at fair value	20,160	28,700
Derivative financial instruments, net	'	0
Fair Value Liabilities, Convertible debentures - embedded derivative	'	1,090
Total liabilities measured at fair value	'	1,090
Net assets measured at fair value	'	27,610
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	'	'
Total assets measured at fair value	213,988	108,311
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	'	'
Total assets measured at fair value	131,990	124,988
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	'	'
Total assets measured at fair value	319,970	163,674
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	'	'
Total assets measured at fair value	69,998	95,039
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	'	'
Total assets measured at fair value	194,984	54,989
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	'	'
Total assets measured at fair value	213,988	108,311
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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	69,998	95,039
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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	131,990	124,988
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	'	'
Total assets measured at fair value	319,970	163,674
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	'	'
Total assets measured at fair value	0	0
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	'	'
Total assets measured at fair value	194,984	54,989
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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	234,916	179,933
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	'	'
Total assets measured at fair value	226,828	200,670
Fair Value, Measurements, Recurring [Member] | Short-Term Investments [Member] | Municipal Bonds [Member]	'	'
Assets and Liabilities Measured at Fair Value on a Recurring Basis	'	'
Total assets measured at fair value	15,780	3,706
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	'	'
Total assets measured at fair value	438,445	491,898
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	'	'
Total assets measured at fair value	159,951	214,912
Fair Value, Measurements, Recurring [Member] | Short-Term Investments [Member] | Mortgage-Backed Securities [Member]	'	'
Assets and Liabilities Measured at Fair Value on a Recurring Basis	'	'
Total assets measured at fair value	387,508	68
Fair Value, Measurements, Recurring [Member] | Short-Term Investments [Member] | Debt Mutual Fund [Member]	'	'
Assets and Liabilities Measured at Fair Value on a Recurring Basis	'	'
Total assets measured at fair value	20,216	'
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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	349,023	416,887
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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	234,916	179,933
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	'	'
Total assets measured at fair value	226,828	200,670
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	'	'
Total assets measured at fair value	15,780	3,706
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	'	'
Total assets measured at fair value	89,422	75,011
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	'	'
Total assets measured at fair value	159,951	214,912
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	'	'
Total assets measured at fair value	387,508	68
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	'	'
Total assets measured at fair value	20,216	'
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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	0	'
Fair Value, Measurements, Recurring [Member] | Long-Term Investments [Member] | Non-financial institution securities [Member]	'	'
Assets and Liabilities Measured at Fair Value on a Recurring Basis	'	'
Total assets measured at fair value	209,274	235,275
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	'	'
Total assets measured at fair value	20,160	28,700
Fair Value, Measurements, Recurring [Member] | Long-Term Investments [Member] | Municipal Bonds [Member]	'	'
Assets and Liabilities Measured at Fair Value on a Recurring Basis	'	'
Total assets measured at fair value	15,986	21,234
Fair Value, Measurements, Recurring [Member] | Long-Term Investments [Member] | U.S. Government and Agency Securities [Member]	'	'
Assets and Liabilities Measured at Fair Value on a Recurring Basis	'	'
Total assets measured at fair value	41,076	110,285
Fair Value, Measurements, Recurring [Member] | Long-Term Investments [Member] | Mortgage-Backed Securities [Member]	'	'
Assets and Liabilities Measured at Fair Value on a Recurring Basis	'	'
Total assets measured at fair value	847,581	1,192,612
Fair Value, Measurements, Recurring [Member] | Long-Term Investments [Member] | Debt Mutual Fund [Member]	'	'
Assets and Liabilities Measured at Fair Value on a Recurring Basis	'	'
Total assets measured at fair value	56,698	62,927
Fair Value, Measurements, Recurring [Member] | Long-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	'	'
Total assets measured at fair value	0	0
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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	0	0
Fair Value, Measurements, Recurring [Member] | Long-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	'	'
Total assets measured at fair value	4,950	55,142
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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	0	0
Fair Value, Measurements, Recurring [Member] | Long-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	'	'
Total assets measured at fair value	209,274	235,275
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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	15,986	21,234
Fair Value, Measurements, Recurring [Member] | Long-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	'	'
Total assets measured at fair value	36,126	55,143
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	'	'
Total assets measured at fair value	847,581	1,192,612
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	'	'
Total assets measured at fair value	56,698	62,927
Fair Value, Measurements, Recurring [Member] | Long-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	'	'
Total assets measured at fair value	0	0
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	'	'
Total assets measured at fair value	20,160	28,700
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	'	'
Total assets measured at fair value	0	0
Fair Value, Measurements, Recurring [Member] | Long-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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	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	'	'
Total assets measured at fair value	$0	$0

Fair_Value_Measurements_Detail1

Fair Value Measurements (Details 1) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014		Mar. 30, 2013
Changes in Level 3 instruments measured at fair value on a recurring basis	'		'
Balance as of beginning of period	$27,610		$27,998
Gains (losses) included in interest and other expense, net	1,090		-159
Gains (losses) included in other comprehensive income (loss)	1,760		471
Sales and settlements, net	-10,300	[1]	-700	[1]
Balance as of end of period	$20,160		$27,610
[1]	During fiscal 2014 and 2013, the Company redeemed $10.3 million and $700 thousand of student loan auction rate securities, respectively, for cash at par value.

Fair_Value_Measurements_Detail2

Fair Value Measurements (Details 2) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Gains or (losses) included in net income attributable to change in unrealized gains or losses relating to assets and liabilities	'	'	'
Interest and other expense, net	$0	($159)	$14

Fair_Value_Measurements_Detail3

Fair Value Measurements (Details Textual) (USD $)	12 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Noncurrent	$1,190,775,000	$1,651,033,000
Available-for-sale Securities	3,605,349,000	3,289,221,000
Hypothetical change in percentage input to valuation model of level 3 assets	1.00%	'
Two And One Two Five Percent 2019 Senior Debentures [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of debentures	498,300,000	'
Three Point Zero Percent 2021 Senior Debentures [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of debentures	497,800,000	'
Minimum [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Discount rate on fair value of student loan auction rate securities range	2.12%	'
Maximum [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Discount rate on fair value of student loan auction rate securities range	2.80%	'
Auction Rate Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Available-for-sale Securities, Noncurrent	20,160,000	28,700,000
Weighted average life over which cash flows are projected for student loan auction rate securities	'8 years	'
Hypothetical increase or decrease percentage of the weighted average life assumption	20.00%	'
Auction Rate Securities [Member] | Minimum [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Student Loan Auction Rate Securities Maturity Date	'June 2043	'
Auction Rate Securities [Member] | Maximum [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Student Loan Auction Rate Securities Maturity Date	'May 2047	'
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	$1,120,000,000	'

Financial_Instruments_Details

Financial Instruments (Details) (USD $)	Mar. 29, 2014	Mar. 30, 2013
In Thousands, unless otherwise specified
Available-for-sale securities	'	'
Amortized Cost	$3,606,739	$3,272,432
Available-for-sale Securities, Gross Unrealized Gains (Instant)	16,763	25,316
Available-for-sale Securities, Gross Unrealized Losses (Instant)	-18,153	-8,527
Available-for-sale Securities, Noncurrent	1,190,775	1,651,033
Estimated Fair Value	3,605,349	3,289,221
Money Market Funds [Member]	'	'
Available-for-sale securities	'	'
Amortized Cost	213,988	108,311
Available-for-sale Securities, Gross Unrealized Gains (Instant)	0	0
Available-for-sale Securities, Gross Unrealized Losses (Instant)	0	0
Estimated Fair Value	213,988	108,311
financial institution securities [Member]	'	'
Available-for-sale securities	'	'
Amortized Cost	366,906	304,921
Available-for-sale Securities, Gross Unrealized Gains (Instant)	0	0
Available-for-sale Securities, Gross Unrealized Losses (Instant)	0	0
Estimated Fair Value	366,906	304,921
Non-financial institution securities [Member]	'	'
Available-for-sale securities	'	'
Amortized Cost	753,888	594,561
Available-for-sale Securities, Gross Unrealized Gains (Instant)	3,428	5,193
Available-for-sale Securities, Gross Unrealized Losses (Instant)	-1,244	-135
Estimated Fair Value	756,072	599,619
Auction Rate Securities [Member]	'	'
Available-for-sale securities	'	'
Amortized Cost	21,500	31,900
Available-for-sale Securities, Gross Unrealized Gains (Instant)	0	0
Available-for-sale Securities, Gross Unrealized Losses (Instant)	-1,340	-3,200
Available-for-sale Securities, Noncurrent	20,160	28,700
Municipal Bonds [Member]	'	'
Available-for-sale securities	'	'
Amortized Cost	31,367	24,496
Available-for-sale Securities, Gross Unrealized Gains (Instant)	604	514
Available-for-sale Securities, Gross Unrealized Losses (Instant)	-205	-70
Estimated Fair Value	31,766	24,940
U.S. Government and Agency Securities [Member]	'	'
Available-for-sale securities	'	'
Amortized Cost	548,568	696,836
Available-for-sale Securities, Gross Unrealized Gains (Instant)	1,135	431
Available-for-sale Securities, Gross Unrealized Losses (Instant)	-184	-45
Estimated Fair Value	549,519	697,222
Foreign Government and Agency Securities [Member]	'	'
Available-for-sale securities	'	'
Amortized Cost	354,935	269,901
Available-for-sale Securities, Gross Unrealized Gains (Instant)	0	0
Available-for-sale Securities, Gross Unrealized Losses (Instant)	0	0
Estimated Fair Value	354,935	269,901
Mortgage-Backed Securities [Member]	'	'
Available-for-sale securities	'	'
Amortized Cost	1,234,237	1,180,156
Available-for-sale Securities, Gross Unrealized Gains (Instant)	11,380	17,601
Available-for-sale Securities, Gross Unrealized Losses (Instant)	-10,528	-5,077
Estimated Fair Value	1,235,089	1,192,680
Debt Mutual Fund [Member]	'	'
Available-for-sale securities	'	'
Amortized Cost	81,350	61,350
Available-for-sale Securities, Gross Unrealized Gains (Instant)	216	1,577
Available-for-sale Securities, Gross Unrealized Losses (Instant)	-4,652	0
Estimated Fair Value	$76,914	$62,927

Financial_Instruments_Details_

Financial Instruments (Details 1) (USD $)	Mar. 29, 2014	Mar. 30, 2013
In Thousands, unless otherwise specified
Fair values and gross unrealized losses of the investments	'	'
Available-for-Sale Securities, Less Than 12 Months, Fair Value	$751,113	$792,298
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses	-13,394	-5,180
Available-for-Sale Securities, 12 Months or Greater, Fair Value	158,767	39,790
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses	-4,759	-3,347
Available-for-Sale Securities, Fair Value, Total	909,880	832,088
Available-for-Sale Securities, Gross Unrealized Losses, Total	-18,153	-8,527
Non-financial institution securities [Member]	'	'
Fair values and gross unrealized losses of the investments	'	'
Available-for-Sale Securities, Less Than 12 Months, Fair Value	112,470	27,114
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses	-1,167	-135
Available-for-Sale Securities, 12 Months or Greater, Fair Value	4,488	0
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses	-77	0
Available-for-Sale Securities, Fair Value, Total	116,958	27,114
Available-for-Sale Securities, Gross Unrealized Losses, Total	-1,244	-135
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	20,160	28,701
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses	-1,340	-3,200
Available-for-Sale Securities, Fair Value, Total	20,160	28,701
Available-for-Sale Securities, Gross Unrealized Losses, Total	-1,340	-3,200
Municipal Bonds [Member]	'	'
Fair values and gross unrealized losses of the investments	'	'
Available-for-Sale Securities, Less Than 12 Months, Fair Value	5,917	8,927
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses	-166	-70
Available-for-Sale Securities, 12 Months or Greater, Fair Value	1,743	60
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses	-39	0
Available-for-Sale Securities, Fair Value, Total	7,660	8,987
Available-for-Sale Securities, Gross Unrealized Losses, Total	-205	-70
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	118,125	388,696
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses	-184	-45
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	118,125	388,696
Available-for-Sale Securities, Gross Unrealized Losses, Total	-184	-45
Mortgage-Backed Securities [Member]	'	'
Fair values and gross unrealized losses of the investments	'	'
Available-for-Sale Securities, Less Than 12 Months, Fair Value	457,903	367,561
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses	-7,225	-4,930
Available-for-Sale Securities, 12 Months or Greater, Fair Value	132,376	11,029
Available-for-Sale Securities, 12 Months or Greater, Gross Unrealized Losses	-3,303	-147
Available-for-Sale Securities, Fair Value, Total	590,279	378,590
Available-for-Sale Securities, Gross Unrealized Losses, Total	-10,528	-5,077
Debt Mutual Fund [Member]	'	'
Fair values and gross unrealized losses of the investments	'	'
Available-for-Sale Securities, Less Than 12 Months, Fair Value	56,698	'
Available-for-Sale Securities, Less Than 12 Months, Gross Unrealized Losses	-4,652	'
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	56,698	'
Available-for-Sale Securities, Gross Unrealized Losses, Total	($4,652)	'

Financial_Instruments_Details_1

Financial Instruments (Details 2) (USD $)	Mar. 29, 2014
Investments, All Other Investments [Abstract]	'
Marketable debt securities with contractual maturities greater than one year but classified as short-term investment	$585,900,000
Amortized cost and estimated fair value of marketable debt securities	'
Amortized Cost Due in one year or less	1,614,563,000
Amortized Cost Due after one year through five years	437,854,000
Amortized Cost Due after five years through ten years	231,266,000
Amortized Cost Due after ten years	1,027,718,000
Amortized Cost Total	3,311,401,000
Estimated Fair Value Due in one year or less	1,614,735,000
Estimated Fair Value Due after one year through five years	440,661,000
Estimated Fair Value Due after five years through ten years	232,909,000
Estimated Fair Value Due after ten years	1,026,142,000
Estimated Fair Value Total	$3,314,447,000

Financial_Instruments_Details_2

Financial Instruments (Details 3) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Information on sale of available-for-sale securities	'	'	'
Gross realized gains on sale of available-for-sale securities	$2,080	$3,488	$2,916
Gross realized losses on sale of available-for-sale securities	-2,412	-673	-401
Net realized gains (losses) on sale of available-for-sale securities	-332	2,815	2,515
Amortization of premiums on available-for-sale securities	$27,293	$25,123	$13,302

Derivative_Financial_Instrumen3

Derivative Financial Instruments (Details) (USD $)	Mar. 29, 2014	Mar. 30, 2013
In Thousands, unless otherwise specified
Derivative [Line Items]	'	'
Derivative Asset, Notional Amount	$146,573	$149,496
Singapore Dollar [Member]	'	'
Derivative [Line Items]	'	'
Derivative Asset, Notional Amount	60,551	70,197
Euro [Member]	'	'
Derivative [Line Items]	'	'
Derivative Asset, Notional Amount	46,062	39,865
Indian Rupee [Member]	'	'
Derivative [Line Items]	'	'
Derivative Asset, Notional Amount	18,631	16,941
British Pound [Member]	'	'
Derivative [Line Items]	'	'
Derivative Asset, Notional Amount	12,056	11,602
Japanese Yen [Member]	'	'
Derivative [Line Items]	'	'
Derivative Asset, Notional Amount	$9,273	$10,891

Derivative_Financial_Instrumen4

Derivative Financial Instruments (Details 1) (USD $)	Mar. 29, 2014	Mar. 30, 2013
In Thousands, unless otherwise specified
Prepaid expenses and other current assets	'	'
Derivative Instruments located on Condensed Consolidated Balance sheet	'	'
Asset Derivatives, Fair Value	$2,648	$1,179
Other accrued liabilities	'	'
Derivative Instruments located on Condensed Consolidated Balance sheet	'	'
Liability Derivatives, Fair Value	$935	$2,794

Derivative_Financial_Instrumen5

Derivative Financial Instruments (Details 2) (Cash Flow Hedging [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014		Mar. 30, 2013
Foreign Exchange Contracts [Member]	'		'
Effect of derivative instruments located on condensed consolidated Statements of Income	'		'
Amount of gains recognized in other comprehensive income on derivative (effective portion of cash flow hedging)	$2,167		$1,734
Interest And Other Expense, Net [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)	-1,707	[1]	-2,793	[1]
Amount of gains (losses) recorded (ineffective portion)	($13)	[1]	($5)	[1]
[1]	Recorded in Interest and Other Expense location within the consolidated statements of income.

Derivative_Financial_Instrumen6

Derivative Financial Instruments (Details Textual) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 30, 2013
		Fair Value, Measurements, Recurring [Member]	Fair Value, Measurements, Recurring [Member]
			Fair Value, Inputs, Level 3 [Member]
Derivative [Line Items]	'	'	'
Hedging Program number of years	'2 years	'	'
Maturity of Foreign Currency Derivatives	28-Feb-16	'	'
Embedded Derivative, Fair Value of Embedded Derivative Liability	'	$1,090	$1,090

StockBased_Compensation_Plans_1

Stock-Based Compensation Plans (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Stock Based compensation expense	'	'	'
Income tax effect	($67,000)	($32,600)	($31,200)
Employee Stock Purchase Plan [Member]	'	'	'
Stock Based compensation expense	'	'	'
Stock-based compensation effect on income before taxes	94,314	77,862	67,418
Income tax effect	-27,327	-22,137	-19,214
Net stock-based compensation effect on net income	66,987	55,725	48,204
Employee Stock Purchase Plan [Member] | Cost of Revenues [Member]	'	'	'
Stock Based compensation expense	'	'	'
Stock-based compensation effect on income before taxes	7,602	6,356	5,630
Employee Stock Purchase Plan [Member] | Research and Development [Member]	'	'	'
Stock Based compensation expense	'	'	'
Stock-based compensation effect on income before taxes	46,197	37,937	32,310
Employee Stock Purchase Plan [Member] | Selling, General and Administrative Expenses [Member]	'	'	'
Stock Based compensation expense	'	'	'
Stock-based compensation effect on income before taxes	$40,515	$33,569	$29,478

StockBased_Compensation_Plans_2

Stock-Based Compensation Plans (Details 1)	12 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Employee Stock Purchase Plan [Member]	'	'	'
Weighted average assumptions in estimation of fair value per share of stock	'	'	'
Expected Term	'1 year 3 months 18 days	'1 year 3 months 18 days	'1 year 3 months 18 days
Expected Volatility	24.00%	26.00%	29.00%
Risk-free interest rate	0.20%	0.20%	0.20%
Dividend yield	2.40%	2.70%	2.40%
Restricted Stock Units (RSUs) [Member]	'	'	'
Weighted average assumptions in estimation of fair value per share of stock	'	'	'
Risk-free interest rate	0.70%	0.40%	0.70%
Dividend yield	2.50%	2.70%	2.20%

StockBased_Compensation_Plans_3

Stock-Based Compensation Plans (Details 2) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 29, 2014		Mar. 30, 2013	Mar. 31, 2012	Apr. 02, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'	'	'
Common stock, closing price per share	$53.84		'	'	'
Employee Stock Option [Member]	'		'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'	'	'
Number of Shares, Vested	4,935		11,639	'	'
Number of Shares, Expected to vest	326		'	'	'
Number of Shares, Total vested and expected to vest	5,261		'	'	'
Number of Shares, Total outstanding	5,280		12,753	17,788	24,969
Weighted-Average Exercise Price Per Share, Vested (in dollars per share)	$24.87		$28.07	'	'
Weighted-Average Exercise Price Per Share, Expected to vest (in dollars per share)	$30.36		'	'	'
Weighted-Average Exercise Price Per Share, Total vested and expected to vest (in dollars per share)	$25.21		'	'	'
Weighted-Average Exercise Price Per Share, Total outstanding (in dollars per share)	$25.22		$28.01	$28.32	$29.11
Weighted-Average Remaining Contractual Term, Vested (in years)	'2 years 2 months 13 days		'	'	'
Weighted Average Remaining Contractual Term, Expected to vest (in years)	'4 years 1 month 6 days		'	'	'
Weighted Average Remaining Contractual Term, Total vested and expected to vest (in years)	'2 years 3 months 19 days		'	'	'
Weighted Average Remaining Contractual Term, Total outstanding (in years)	'2 years 3 months 19 days		'	'	'
Aggregate Intrinsic Value, Vested	$142,968	[1]	'	'	'
Aggregate Intrinsic Value, Expected to vest	7,648	[1]	'	'	'
Aggregate Intrinsic Value, Total vested and expected to vest	150,616	[1]	'	'	'
Aggregate Intrinsic Value, Total outstanding	$151,139	[1]	'	'	'
[1]	These amounts represent the difference between the exercise price and $53.84, the closing price per share of Xilinx’s stock on March 29, 2014, for all in-the-money options outstanding.

StockBased_Compensation_Plans_4

Stock-Based Compensation Plans (Details 3)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Shares Available for Grant Under Option Plan [Roll Forward]	'	'	'
Shares Available for Grant, Ending Balance	20,300	'	'
2007 Equity Plan [Member]	'	'	'
Shares Available for Grant Under Option Plan [Roll Forward]	'	'	'
Shares Available for Grant, Beginning Balance	15,990	14,908	13,164
Shares Available for Grant, Additional share reserved	2,000	3,500	4,500
Shares Available for Grant, Stock options granted	-8	-92	-207
Shares Available for Grant, Stock options cancelled	26	209	70
Shares Available for Grant, RSUs granted	-3,297	-3,018	-2,977
Shares Available for Grant, RSUs cancelled	326	483	358
Shares Available for Grant, Ending Balance	15,037	15,990	14,908

StockBased_Compensation_Plans_5

Stock-Based Compensation Plans (Details 4) (Employee Stock Option [Member], USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Employee Stock Option [Member]	'	'	'
Summary of option plans activity	'	'	'
Number of Shares, Beginning balance	12,753	17,788	24,969
Number of Shares, Exercised	-7,421	-3,564	-3,622
Number of Shares, Forfeited/cancelled/expired	-60	-1,563	-3,766
Number of Shares, Ending balance	5,280	12,753	17,788
Number of Shares, Options exercisable	4,935	11,639	'
Weighted-Average Exercise Price Per Share, Beginning balance	$28.01	$28.32	$29.11
Weighted-Average Exercise Price Per Share, Granted	$41.08	$33.83	$34.79
Weighted-Average Exercise Price Per Share, Exercised	$29.95	$24.68	$24.70
Weighted-Average Exercise Price Per Share, Forfeited/cancelled/expired	$35.61	$39.54	$37.35
Weighted-Average Exercise Price Per Share, Ending balance	$25.22	$28.01	$28.32
Weighted-Average Exercise Price Per Share, Options exercisable	$24.87	$28.07	'

StockBased_Compensation_Plans_6

Stock-Based Compensation Plans (Details 5) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012	Apr. 02, 2011
Exercise Price Range One [Member]	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'
Exercise price range, lower range limit	$15.95	'	'	'
Exercise price range, upper range limit	$19.79	'	'	'
Exercise Price Range Two [Member]	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'
Exercise price range, lower range limit	$20.14	'	'	'
Exercise price range, upper range limit	$29.93	'	'	'
Exercise Price Range Three [Member]	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'
Exercise price range, lower range limit	$30.04	'	'	'
Exercise price range, upper range limit	$38.51	'	'	'
Exercise Price Range Four [Member]	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'
Exercise price range, lower range limit	$40.11	'	'	'
Exercise price range, upper range limit	$41.81	'	'	'
Employee Stock Option [Member]	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'
Options Outstanding	5,280	12,753	17,788	24,969
Options Outstanding, Weighted Average Remaining Contractual Term (in years)	'2 years 3 months 19 days	'	'	'
Options Outstanding, Weighted Average Exercise Price Per Share (in dollars per share)	$25.22	$28.01	$28.32	$29.11
Options Exercisable	4,935	11,639	'	'
Options Exercisable, Weighted Average Exercise Price Per Share (in dollars per share)	$24.87	$28.07	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants In Period, Weighted Average Exercise Price1	$41.08	$33.83	$34.79	'
Employee Stock Option [Member] | Exercise Price Range One [Member]	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'
Options Outstanding	78	'	'	'
Options Outstanding, Weighted Average Remaining Contractual Term (in years)	'1 year 11 months 21 days	'	'	'
Options Outstanding, Weighted Average Exercise Price Per Share (in dollars per share)	$18.15	'	'	'
Options Exercisable	78	'	'	'
Options Exercisable, Weighted Average Exercise Price Per Share (in dollars per share)	$18.15	'	'	'
Employee Stock Option [Member] | Exercise Price Range Two [Member]	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'
Options Outstanding	4,766	'	'	'
Options Outstanding, Weighted Average Remaining Contractual Term (in years)	'2 years 2 months 16 days	'	'	'
Options Outstanding, Weighted Average Exercise Price Per Share (in dollars per share)	$24.46	'	'	'
Options Exercisable	4,604	'	'	'
Options Exercisable, Weighted Average Exercise Price Per Share (in dollars per share)	$24.41	'	'	'
Employee Stock Option [Member] | Exercise Price Range Three [Member]	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'
Options Outstanding	355	'	'	'
Options Outstanding, Weighted Average Remaining Contractual Term (in years)	'4 years 1 month 21 days	'	'	'
Options Outstanding, Weighted Average Exercise Price Per Share (in dollars per share)	$33.54	'	'	'
Options Exercisable	180	'	'	'
Options Exercisable, Weighted Average Exercise Price Per Share (in dollars per share)	$32.88	'	'	'
Employee Stock Option [Member] | Exercise Price Range Four [Member]	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'
Options Outstanding	81	'	'	'
Options Outstanding, Weighted Average Remaining Contractual Term (in years)	'0 years 1 month 10 days	'	'	'
Options Outstanding, Weighted Average Exercise Price Per Share (in dollars per share)	$40.11	'	'	'
Options Exercisable	73	'	'	'
Options Exercisable, Weighted Average Exercise Price Per Share (in dollars per share)	$40.11	'	'	'

StockBased_Compensation_Plans_7

Stock-Based Compensation Plans (Details 6) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 29, 2014		Mar. 30, 2013		Mar. 31, 2012
Summary of restricted stock unit activity and related information	'		'		'
Common stock, closing price per share	$53.84		'		'
Restricted Stock Units (RSUs) [Member]	'		'		'
Summary of restricted stock unit activity and related information	'		'		'
Number of Shares, Beginning balance	5,996		5,239		4,215
Number of Shares, Granted	3,297		3,018		2,977
Number of Shares, Vested	-2,066	[1]	-1,778	[1]	-1,543	[1]
Number of Shares, Cancelled	-326		-483		-410
Number of Shares, Ending balance	6,901		5,996		5,239
Number of Shares, Expected to vest	6,339		'		'
Weighted-Average Grant-Date Fair Value Per Share, Beginning balance (in dollars per share)	$30.83		$29.01		$23.19
Weighted-Average Grant-Date Fair Value Per Share, Granted (in dollars per share)	$38.90		$31.58		$33.69
Weighted-Average Grant-Date Fair Value Per Share, Vested (in dollars per share)	$29.25	[1]	$27.01	[1]	$23.11	[1]
Weighted-Average Grant-Date Fair Value Per Share, Cancelled (in dollars per share)	$32.28		$29.69		$25.18
Weighted-Average Grant-Date Fair Value Per Share, Ending balance (in dollars per share)	$35.08		$30.83		$29.01
Weighted-Average Grant-Date Fair Value Per Share, Expected to vest (in dollars per share)	$35.22		'		'
Weighted Average Remaining Contractual Term (in years)	'2 years 4 months 18 days		'		'
Weighted Average Remaining Contractual Term, Expected to vest (in years)	'3 years 4 months 18 days		'		'
Aggregate Intrinsic Value	$371,578	[2]	'		'
Aggregate Intrinsic Value, Expected to vest	$341,289	[2]	'		'
[1]	The number of RSUs vested includes shares that the Company withheld on behalf of employees to satisfy the statutory tax withholding requirements.
[2]	Aggregate intrinsic value for RSUs represents the closing price per share of Xilinx’s stock on March 29, 2014 of $53.84, multiplied by the number of RSUs outstanding or expected to vest as of March 29, 2014.

StockBased_Compensation_Plans_8

Stock-Based Compensation Plans (Details Textual) (USD $)

12 Months Ended

12 Months Ended

Mar. 29, 2014

Mar. 30, 2013

Mar. 31, 2012

Mar. 29, 2014

Mar. 30, 2013

Mar. 29, 2014

Mar. 30, 2013

Mar. 31, 2012

Mar. 29, 2014

Mar. 29, 2014

Mar. 30, 2013

Mar. 31, 2012

Mar. 29, 2014

Mar. 30, 2013

Mar. 31, 2012

Apr. 02, 2011

Mar. 29, 2014

Employee Stock Option [Member]

Employee Stock Option [Member]

Employee Stock Purchase Plan [Member]

Employee Stock Purchase Plan [Member]

Employee Stock Purchase Plan [Member]

Employee Stock Purchase Plan [Member]

Restricted Stock Units [Member]

Restricted Stock Units [Member]

Restricted Stock Units [Member]

2007 Equity Plan [Member]

2007 Equity Plan [Member]

2007 Equity Plan [Member]

2007 Equity Plan [Member]

Prior to April 1, 2007 [Member]

Maximum [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Capitalized stock-based compensation, included in inventory

$2,400,000

$2,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Tax benefit associated with stock option exercises and other awards

67,000,000

32,600,000

31,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Weighted average fair value per share of stock options granted

'

'

'

'

'

$11.11

$8.61

$9.42

'

'

'

'

'

'

'

'

'

Weighted average fair value per share of RSUs and stock purchase rights granted

'

'

'

'

'

'

'

'

'

$38.90

$31.58

$33.69

'

'

'

'

'

Fair value of options vested during the period

'

'

'

4,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Nonvested awards, stock-based compensation cost not yet recognized

'

'

'

2,400,000

'

20,900,000

'

'

'

185,100,000

'

'

'

'

'

'

'

Nonvested awards, stock-based compensation cost not yet recognized, weighted-average recognition period

'

'

'

'1 year 2 months 6 days

'

'1 year 1 month 24 days

'

'

'

'2 years 7 months 18 days

'

'

'7 years

'

'

'

'10 years

Shares available for grant

20,300,000

'

'

'

'

9,700,000

'

'

'

'

'

'

15,037,000

15,990,000

14,908,000

13,164,000

'

Percentage of fair market value of stock on the grant date

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Award vesting period

'4 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Pre-tax intrinsic value of options exercised in period

'

'

'

119,600,000

38,900,000

'

'

'

'

'

'

'

'

'

'

'

'

Fair value of restricted stock units vested during the period

'

'

'

'

'

'

'

'

'

60,400,000

'

'

'

'

'

'

'

Stock Purchase Plan, Exercise period

'

'

'

'

'

'6 months

'

'

'

'

'

'

'

'

'

'

'

Percentage Of Participation Of Employee Annual Earnings

'

'

'

'

'

'

'

'

15.00%

'

'

'

'

'

'

'

'

Employee Stock Purchase Plan annual earnings Maximum

'

'

'

'

'

'

'

'

21,000

'

'

'

'

'

'

'

'

Percentage of Employee Stock Purchase Plan participation

'

'

'

'

'

78.00%

'

'

'

'

'

'

'

'

'

'

'

Percentage Of Employee Stock Purchase plan Lower Fair Market Value

'

'

'

'

'

85.00%

'

'

'

'

'

'

'

'

'

'

'

Stock offering period

'

'

'

'

'

'24 months

'

'

'

'

'

'

'

'

'

'

'

Number of shares authorized, employee stock purchase plan

'

'

'

'

'

50,500,000

'

'

'

'

'

'

'

'

'

'

'

Stock Issued During Period, Shares, Employee Stock Purchase Plans

'

'

'

'

'

1,200,000

1,300,000

1,200,000

'

'

'

'

'

'

'

'

'

Stock Issued During Period, Value, Employee Stock Purchase Plan

'

'

'

'

'

$37,900,000

$34,500,000

$33,100,000

'

'

'

'

'

'

'

'

'

Balance_Sheet_Information_Paya

Balance Sheet Information Payables and Accruals (Details) (USD $)	Mar. 29, 2014	Mar. 30, 2013
In Thousands, unless otherwise specified
Payables and Accruals [Abstract]	'	'
Accrued Salaries	$90,865	$66,967
Deferred Compensation Liability, Current	59,569	50,412
Other Employee Related Liabilities, Current	6,939	6,816
Employee-related Liabilities, Current	$157,373	$124,195

Restructuring_Charges_Details

Restructuring Charges (Details) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Oct. 01, 2011	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
	position
Restructuring Charges [Abstract]	'	'	'	'
Number of positions eliminated in restructuring	46	'	'	'
Number of positions eliminated in restructuring, percent (less than)	2.00%	'	'	'
Restructuring charges	'	$0	$0	$3,369

Commitments_Details

Commitments (Details) (USD $)	Mar. 29, 2014
In Thousands, unless otherwise specified
Future Minimum Lease Payments Under Non-Cancelable Operating Leases	'
2014	$5,904
2015	3,922
2016	2,214
2017	1,931
2018	1,555
Thereafter	3,500
Total	$19,026

Commitments_Details_Textual

Commitments (Details Textual) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Loss Contingencies [Line Items]	'	'	'
Lease Expiration Date	31-Oct-21	'	'
Aggregate future rental income to be received	$4.50	'	'
Rent expense, net of rental income	3.1	3.9	3.1
Other commitments	143.8	'	'
Non-cancelable license obligations	24.5	'	'
Software and Maintenance License Obligations Expiration Date	31-Dec-16	'	'
Maximum future commitment to acquire licenses to intellectual property until July 2023	$5	'	'
Commitments To Acquire Rights to Intellectual Property Expiration Date	31-Jul-23	'	'
Minimum [Member]	'	'	'
Loss Contingencies [Line Items]	'	'	'
Purchase Commitments, Period for Payment	'3 months	'	'
Maximum [Member]	'	'	'
Loss Contingencies [Line Items]	'	'	'
Purchase Commitments, Period for Payment	'6 months	'	'

Net_Income_Per_Common_Share_De

Net Income Per Common Share (Details)	12 Months Ended
In Millions, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Debt Instrument [Line Items]	'	'	'
Antidilutive shares excluded from computation of dilutive net income per common share	5.1	27.9	30.6

Net_Income_Per_Common_Share_Ea1

Net Income Per Common Share Earnings Per Common Share (Details) (USD $)

3 Months Ended

12 Months Ended

In Thousands, except Per Share data, unless otherwise specified

Mar. 29, 2014

Dec. 28, 2013

Sep. 28, 2013

Jun. 29, 2013

Mar. 30, 2013

Dec. 29, 2012

Sep. 29, 2012

Jun. 30, 2012

Mar. 29, 2014

Mar. 30, 2013

Mar. 31, 2012

Earnings Per Share [Abstract]

'

'

'

'

'

'

'

'

'

'

'

Net income

$156,027

[1]

$175,877

[1]

$141,461

[1]

$157,023

[1]

$130,620

[2]

$103,648

[2]

$123,437

[2]

$129,831

[2]

$630,388

$487,536

$530,079

Weighted Average Number of Shares Outstanding, Basic

268,134

[1]

267,780

[1]

268,478

[1]

264,153

[1]

263,035

[2]

260,690

[2]

260,605

[2]

263,055

[2]

266,431

261,652

263,783

Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements

'

'

'

'

'

'

'

'

4,508

4,146

4,493

Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities and Warrants

'

'

'

'

'

'

'

'

8,544

2,924

1,708

Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities

'

'

'

'

'

'

'

'

7,913

3,851

2,173

Weighted Average Number of Shares Outstanding, Diluted

294,536

[1]

288,195

[1]

290,685

[1]

280,291

[1]

277,090

[2]

271,174

[2]

270,265

[2]

273,820

[2]

287,396

272,573

272,157

Earnings Per Share, Basic

$0.58

[1],[3]

$0.66

[1],[3]

$0.53

[1],[3]

$0.59

[1],[3]

$0.50

[2],[4]

$0.40

[2],[4]

$0.47

[2],[4]

$0.49

[2],[4]

$2.37

$1.86

$2.01

Earnings Per Share, Diluted

$0.53

[1],[3]

$0.61

[1],[3]

$0.49

[1],[3]

$0.56

[1],[3]

$0.47

[2],[4]

$0.38

[2],[4]

$0.46

[2],[4]

$0.47

[2],[4]

$2.19

$1.79

$1.95

[1]

Xilinx uses a 52- to 53-week fiscal year ending on the Saturday nearest March 31. Fiscal 2014 was a 52-week year and each quarter was a 13-week quarter.

[2]

Xilinx uses a 52- to 53-week fiscal year ending on the Saturday nearest March 31. Fiscal 2013 was a 52-week year and each quarter was a 13-week quarter.

[3]

Income before income taxes for the second quarter of fiscal 2014 included litigation and contingencies charge of $28,600, for the third quarter of fiscal 2014 included reversal of litigation and contingencies charge of$19,190 and for the fourth quarter of fiscal 2014 included loss on extinguishment of convertible debentures of $9,848.

[4]

Net income per common share is computed independently for each of the quarters presented. Therefore, the sum of the quarterly per common share information may not equal the annual net income per common share.

Net_Income_Per_Common_Share_Ne

Net Income Per Common Share Net Income Per Common Share (Details 1) (Two And Six Two Five Percent Senior Convertible Debentures [Member], USD $)	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 30, 2013	Mar. 29, 2014
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	'	20
Price Per Share To Be Purchase By Company Under Call Option	$29.97	'

Interest_and_Other_Expense_Net1

Interest and Other Expense, Net (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Components of interest and other expense	'	'	'
Interest income	$28,079	$25,574	$23,697
Interest expense	-54,035	-55,069	-54,576
Other income (expense), net	-3,597	-4,231	157
Interest and other expense, net	($29,553)	($33,726)	($30,722)

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income (Details) (USD $)	Mar. 29, 2014	Mar. 30, 2013
In Thousands, unless otherwise specified
Components of accumulated other comprehensive income (loss)	'	'
Accumulated unrealized gains (losses) on available-for-sale securities, net of tax	($889)	$10,519
Accumulated unrealized gain (losses) on hedging transactions, net of tax	798	-1,368
Accumulated cumulative translation adjustment, net of tax	-457	-491
Accumulated other comprehensive income (loss)	($548)	$8,660

Debt_and_Credit_Facility_Detai

Debt and Credit Facility (Details) (USD $)	12 Months Ended						12 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012	Mar. 29, 2014	Mar. 12, 2014	Mar. 30, 2013	Mar. 29, 2014	Mar. 29, 2014	Mar. 29, 2014
				Three And One Two Five Percent Junior Subordinated Convertible Debentures [Member]	Three And One Two Five Percent Junior Subordinated Convertible Debentures [Member]	Two And Six Two Five Percent Senior Convertible Debentures [Member]	Two And One Two Five Percent 2019 Senior Debentures [Member]	Three Point Zero Percent 2021 Senior Debentures [Member]	Two And One Two Five Percent 2019 Senior Debentures [Member]
Debt Instrument [Line Items]	'	'	'	'	'	'	'	'	'
Debt Instrument, Face Amount	'	'	'	'	$689,600,000	$600,000,000	'	$500,000,000	$500,000,000
Debt Instrument, Unamortized Discount	'	'	'	'	315,400,000	64,767,000	'	3,556,000	2,574,000
Unamortized Debt Issuance Expense	'	'	'	'	5,100,000	'	'	'	'
Debt Instrument Carrying Amount Of Liability Component	'	'	'	'	377,600,000	553,949,000	'	'	'
2019 Debt instrument, Maturity Date	15-Mar-19	'	'	'	'	'	'	'	'
2021 Debt instrument, Maturity Date	15-Mar-21	'	'	'	'	'	'	'	'
Equity component - net carrying value	'	'	'	'	856,500,000	66,415,000	'	'	'
Discount Percent of Par	'	'	'	'	'	'	'	99.28%	99.48%
Proceeds from Issuance of Long-term Debt	'	0	0	'	'	'	990,149,000	'	'
Extinguishment of Debt, Amount	'	'	'	1,230,000,000	'	'	'	'	'
Unamortized discount of embedded derivative from date of issuance	'	'	'	'	-1,300,000	'	'	'	'
Loss on Extinguishment of Debt	9,848,000	0	0	9,800,000	'	'	'	'	'
Long-term Debt, Excluding Current Maturities	$993,870,000	$922,666,000	'	'	'	'	'	'	'

Debt_and_Credit_Facility_Detai1

Debt and Credit Facility (Details 1) (USD $)	12 Months Ended							12 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012	Mar. 30, 2013	Mar. 31, 2012	Mar. 29, 2014	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012	Mar. 12, 2014
				Two And Six Two Five Percent Senior Convertible Debentures [Member]	Two And Six Two Five Percent Senior Convertible Debentures [Member]	2019 and 2021 Notes Payable [Member]	Two And One Two Five Percent 2019 Senior Debentures [Member]	Three And One Two Five Percent Junior Subordinated Convertible Debentures [Member]	Three And One Two Five Percent Junior Subordinated Convertible Debentures [Member]	Three And One Two Five Percent Junior Subordinated Convertible Debentures [Member]
Debt Instrument [Line Items]	'	'	'	'	'	'	'	'	'	'
Debt Instrument, Face Amount	'	'	'	$600,000,000	'	'	$500,000,000	'	'	$689,600,000
Hedge Accounting Adjustment - Sale Of Interest Rate Swap	'	'	'	18,716,000	'	'	'	'	'	'
Interest Expense, Debt, Excluding Amortization	'	'	'	15,750,000	15,750,000	1,210,000	'	21,551,000	21,551,000	'
Debt Instrument, Unamortized Discount	'	'	'	64,767,000	'	'	2,574,000	'	'	315,400,000
Amortization of Financing Costs	'	'	'	1,448,000	1,448,000	52,000	'	223,000	223,000	'
Amortization of embedded derivative	'	'	'	'	'	'	'	58,000	58,000	'
Amortization of Debt Discount (Premium)	16,319,000	15,880,000	15,545,000	11,052,000	11,052,000	80,000	'	4,828,000	4,493,000	'
Fair value adjustment of embedded derivative	'	'	'	'	'	'	'	159,000	-14,000	'
Interest Expense, Debt	'	'	'	28,250,000	28,250,000	1,342,000	'	26,819,000	26,311,000	'
Proceeds from Issuance of Long-term Debt	'	0	0	'	'	990,149,000	'	'	'	'
Line of Credit Facility, Expiration Date	31-Dec-16	'	'	'	'	'	'	'	'	'
Line of Credit Facility, Maximum Borrowing Capacity	250,000,000	'	'	'	'	'	'	'	'	'
Line of Credit Facility, Average Outstanding Amount	$0	'	'	'	'	'	'	'	'	'

Debt_and_Credit_Facility_Detai2

Debt and Credit Facility (Details 2) (USD $)	12 Months Ended
Share data in Millions, except Per Share data, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Short-term Debt [Line Items]	'	'	'
Amortization of Debt Discount (Premium)	$16,319,000	$15,880,000	$15,545,000
Three And One Two Five Percent Junior Subordinated Convertible Debentures [Member]	'	'	'
Short-term Debt [Line Items]	'	'	'
Interest Expense, Debt, Excluding Amortization	20,065,000	'	'
Amortization of Financing Costs	223,000	'	'
Amortization of embedded derivative	58,000	'	'
Amortization of Debt Discount (Premium)	5,187,000	'	'
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net	1,090,000	'	'
Interest Expense, Debt	24,443,000	'	'
Two And Six Two Five Percent Senior Convertible Debentures [Member]	'	'	'
Short-term Debt [Line Items]	'	'	'
Debt Instrument, Convertible, Remaining Discount Amortization Period	'3 years 2 months 12 days	'	'
Debt Instrument, Face Amount	600,000,000	'	'
Debt Instrument, Convertible, Conversion Ratio	33.3681	'	'
Debt Instrument, Unamortized Discount	49,223,000	'	'
Hedge Accounting Adjustment - Sale Of Interest Rate Swap	14,224,000	'	'
Debt Instrument Carrying Amount Of Liability Component	565,001,000	'	'
Debt Instrument, Convertible, Carrying Amount of Equity Component	66,415,000	'	'
Interest Expense, Debt, Excluding Amortization	15,750,000	'	'
Amortization of Financing Costs	1,448,000	'	'
Amortization of Debt Discount (Premium)	11,052,000	'	'
Interest Expense, Debt	28,250,000	'	'
Base conversion, block amount of senior convertible debenture	$1,000	'	'
Warrants, number of shares the holders have the right to purchase	20	'	'
Class of Warrant or Right, Exercise Price of Warrants or Rights	42.46	'	'
Convertible debt, conversion price	$29.97	'	'

Stockholders_Equity_Details

Stockholders' Equity (Details) (USD $)	12 Months Ended			1 Months Ended	12 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012	Aug. 31, 2012	Mar. 29, 2014	Mar. 29, 2014
				Repurchase Program 2012 [Member]	Repurchase Program 2012 [Member]	Undesignated [Member]
Accelerated Share Repurchases [Line Items]	'	'	'	'	'	'
Preferred stock, shares authorized	2,000,000	2,000,000	'	'	'	2,000,000
Preferred stock, shares issued	0	0	'	'	'	'
Preferred stock, shares outstanding	0	0	'	'	'	'
Amount authorized for common stock repurchase	'	'	'	$750,000,000	'	'
Stock Repurchased and Retired During Period, Value	'	197,689,000	219,638,000	'	252,700,000	'
Total amount available for future repurchases	'	'	'	'	497,300,000	'
Treasury shares	0	0	'	'	'	'
Stock Repurchased During Period, Shares	-5,200,000	-6,200,000	'	'	'	'
Payments for Repurchase of Common Stock	242,094,000	'	'	'	'	'
Cash Payments For Repurchase Of Common Stock	$241,076,000	$197,689,000	$219,638,000	'	'	'

Income_Taxes_Details

Income Taxes (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Federal:	'	'	'
Current	$16,692	$97,108	($17,333)
Deferred	48,021	-45,465	74,911
Federal income tax expense (benefit), Total	64,713	51,643	57,578
State:	'	'	'
Current	1,333	1,007	-2,999
Deferred	5,954	1,742	6,591
State income tax expense (benefit), Total	7,287	2,749	3,592
Foreign:	'	'	'
Current	7,264	5,455	7,978
Deferred	-126	-377	-2,176
Foreign income tax expense (benefit), Total	7,138	5,078	5,802
Total	$79,138	$59,470	$66,972

Income_Taxes_Details_1

Income Taxes (Details 1) (USD $)

3 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Mar. 29, 2014

Dec. 28, 2013

Sep. 28, 2013

Jun. 29, 2013

Mar. 30, 2013

Dec. 29, 2012

Sep. 29, 2012

Jun. 30, 2012

Mar. 29, 2014

Mar. 30, 2013

Mar. 31, 2012

Income Tax Disclosure [Abstract]

'

'

'

'

'

'

'

'

'

'

'

Domestic

'

'

'

'

'

'

'

'

$83,617

$45,617

$74,959

Foreign

'

'

'

'

'

'

'

'

625,909

501,389

522,092

Income before income taxes

$175,850

[1]

$197,932

[1]

$152,765

[1]

$182,979

[1]

$138,325

[2]

$115,693

[2]

$138,083

[2]

$154,905

[2]

$709,526

$547,006

$597,051

[1]

Xilinx uses a 52- to 53-week fiscal year ending on the Saturday nearest March 31. Fiscal 2014 was a 52-week year and each quarter was a 13-week quarter.

[2]

Xilinx uses a 52- to 53-week fiscal year ending on the Saturday nearest March 31. Fiscal 2013 was a 52-week year and each quarter was a 13-week quarter.

Income_Taxes_Details_2

Income Taxes (Details 2) (USD $)

3 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Mar. 29, 2014

Dec. 28, 2013

Sep. 28, 2013

Jun. 29, 2013

Mar. 30, 2013

Dec. 29, 2012

Sep. 29, 2012

Jun. 30, 2012

Mar. 29, 2014

Mar. 30, 2013

Mar. 31, 2012

Income Tax Disclosure [Abstract]

'

'

'

'

'

'

'

'

'

'

'

Income before provision for taxes

$175,850

[1]

$197,932

[1]

$152,765

[1]

$182,979

[1]

$138,325

[2]

$115,693

[2]

$138,083

[2]

$154,905

[2]

$709,526

$547,006

$597,051

Federal statutory tax rate

'

'

'

'

'

'

'

'

35.00%

35.00%

35.00%

Computed expected tax

'

'

'

'

'

'

'

'

248,334

191,452

208,968

State taxes, net of federal benefit

'

'

'

'

'

'

'

'

4,664

1,787

2,162

Foreign earnings at lower tax rates

'

'

'

'

'

'

'

'

-143,336

-107,730

-117,013

Tax credits

'

'

'

'

'

'

'

'

-23,389

-26,305

-29,633

Other

'

'

'

'

'

'

'

'

-7,135

266

2,488

Total

'

'

'

'

'

'

'

'

$79,138

$59,470

$66,972

[1]

Xilinx uses a 52- to 53-week fiscal year ending on the Saturday nearest March 31. Fiscal 2014 was a 52-week year and each quarter was a 13-week quarter.

[2]

Xilinx uses a 52- to 53-week fiscal year ending on the Saturday nearest March 31. Fiscal 2013 was a 52-week year and each quarter was a 13-week quarter.

Income_Taxes_Details_3

Income Taxes (Details 3) (USD $)	Mar. 29, 2014	Mar. 30, 2013
In Thousands, unless otherwise specified
Deferred tax assets:	'	'
Stock-based compensation	$21,142	$27,481
Deferred income on shipments to distributors	8,097	10,043
Accrued expenses	26,864	33,859
Tax credit carryforwards	79,272	62,723
Intangible and fixed assets	0	11,638
Deferred compensation plan	22,280	18,769
Other	13,420	14,948
Deferred tax assets, gross	171,075	179,461
Valuation allowance	-43,004	-26,401
Total deferred tax assets	128,071	153,060
Deferred tax liabilities:	'	'
Unremitted foreign earnings	-253,231	-244,341
Convertible debt	-4,670	-198,943
Other	-5,493	-8,181
Deferred Tax Liabilities, Gross	-263,394	-451,465
Deferred Tax Liabilities, Net	($135,323)	($298,405)

Income_Taxes_Details_4

Income Taxes (Details 4) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Apr. 02, 2011
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]	'	'	'
Balance as of beginning of fiscal year	$69,957	'	$65,038
Increases in tax positions for prior years	163	2,208	'
Decreases in tax positions for prior years	-35,615	-4,281	'
Increases in tax positions for current year	3,687	17,660	'
Settlements	-6,030	-44	'
Lapse in statute of limitations	-5,764	-10,624	'
Balance as of end of fiscal year	$26,398	$69,957	$65,038

Income_Taxes_Details_Textual

Income Taxes (Details Textual) (USD $)	12 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012	Apr. 02, 2011
Income Taxes (Textual) [Abstract]	'	'	'	'
Gross unrecognized tax benefits balance	$26,398,000	$69,957,000	'	$65,038,000
Unrecognized tax benefits that would impact effective tax rate	11,000,000	32,300,000	'	'
Tax benefit (expense) associated with stock option exercises and employee stock purchase plan	67,000,000	32,600,000	31,200,000	'
Net operating loss carryforwards	21,700,000	'	'	'
Net operating loss carryforwards, Expiration dates	31-Dec-30	'	'	'
Tax credit carryforwards	136,000,000	'	'	'
Hypothetical US tax liability if unremitted foreign earnings were remitted	800,300,000	'	'	'
Long-term deferred tax assets	61,900,000	56,400,000	'	'
Deferred tax assets, valuation allowance	43,004,000	26,401,000	'	'
Deferred Tax Liability; Decrease Due to Debt Extinguishment	209,900,000	'	'	'
State [Member]	'	'	'	'
Income Taxes (Textual) [Abstract]	'	'	'	'
Net operating loss carryforwards, valuation allowance	64,500,000	'	'	'
Singapore [Member]	'	'	'	'
Income Taxes (Textual) [Abstract]	'	'	'	'
Statutory tax rate prior to income tax holiday	17.00%	'	'	'
Effective tax rate following income tax holiday	0.00%	'	'	'
Benefit from income tax holiday	60,300,000	41,000,000	43,500,000	'
Benefit from income tax holiday, per share (in dollars per share)	$0.21	$0.15	$0.16	'
Permanently Invested Outside U.S. [Member]	'	'	'	'
Income Taxes (Textual) [Abstract]	'	'	'	'
Unremitted foreign earnings	2,400,000,000	'	'	'
Additional Paid-in Capital [Member]	'	'	'	'
Income Taxes (Textual) [Abstract]	'	'	'	'
Tax benefit (expense) associated with stock option exercises and employee stock purchase plan	$26,400,000	$9,000,000	$9,900,000	'

Segment_Information_Details

Segment Information (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Segment Reporting Information [Line Items]	'	'	'
Net revenues	$2,382,531	$2,168,652	$2,240,736
Net long-lived assets	355,089	365,687	394,982
North America [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Net revenues	707,692	655,560	684,425
United States [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Net revenues	610,276	558,309	596,388
Net long-lived assets	237,229	240,429	254,811
North America, Other [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Net revenues	97,416	97,251	88,037
Foreign Country [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Net long-lived assets	117,860	125,258	140,171
China [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Net revenues	564,814	428,892	418,036
Asia Pacific, Other [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Net revenues	375,013	324,920	326,462
Ireland [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Net long-lived assets	48,043	50,627	53,255
Singapore [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Net long-lived assets	51,569	56,481	66,806
Asia Pacific [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Net revenues	939,827	753,812	744,498
Europe [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Net revenues	519,829	548,375	589,802
Japan [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Net revenues	215,183	210,905	222,011
Foreign, Other [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Net long-lived assets	$18,248	$18,150	$20,110

Litigation_Settlements_and_Con1

Litigation Settlements and Contingencies (Details) (USD $)	3 Months Ended		12 Months Ended
	Dec. 28, 2013	Sep. 28, 2013	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Loss Contingencies [Line Items]	'	'	'	'	'
Remainder Litigation Settlement, Amount	$8,700,000	'	'	'	'
Contingencies (Textual) [Abstract]	'	'	'	'	'
Loss contingency, damages sought, value	19,190,000	28,600,000	9,410,000	0	15,400,000
Litigation Settlement, Amount	$33,500,000	'	'	'	'

Goodwill_and_AcquisitionRelate2

Goodwill and Acquisition-Related Intangibles (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013
Gross and net amounts of goodwill and of acquisition-related intangibles	'	'
Goodwill	$159,296	$158,990
In-process research and development	0	0
Total acquisition-related intangibles, gross	138,576	135,876
Less accumulated amortization	-109,709	-99,822
Total	28,867	36,054
Core Technology [Member]	'	'
Gross and net amounts of goodwill and of acquisition-related intangibles	'	'
Total acquisition-related intangibles, gross	91,860	89,360
Less accumulated amortization	-63,267	-54,201
Total	28,593	35,159
Weighted-Average Amortization Life	'5 years 8 months 18 days	'
Other Intangibles [Member]	'	'
Gross and net amounts of goodwill and of acquisition-related intangibles	'	'
Total acquisition-related intangibles, gross	46,716	46,516
Less accumulated amortization	-46,442	-45,621
Total	$274	$895
Weighted-Average Amortization Life	'2 years 8 months 12 days	'

Goodwill_and_AcquisitionRelate3

Goodwill and Acquisition-Related Intangibles (Details 1) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]	'	'	'
Amortization of acquisition-related intangibles	$9,887	$9,508	$7,568
Schedule of expected annual amortization expense for acquisition-related intangibles	'	'	'
2015	9,537	'	'
2016	8,936	'	'
2017	7,131	'	'
2018	2,660	'	'
2019	603	'	'
Total	$28,867	$36,054	'

Employee_Benefit_Plans_Details

Employee Benefit Plans (Details) (USD $)	12 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
	participant
Postemployment Benefits [Abstract]	'	'	'
Total contribution to the employee benefit plans	$13,200,000	$12,200,000	$12,000,000
Employer matching contribution limit, as a percentage of employee contribution	50.00%	'	'
First part of employee compensation that the employee contributed to their 401(k) accounts	8.00%	'	'
The maximum company contribution per employee	4,500	'	'
Participants' age limit eligible to make catch up salary deferral contribution	'50 years	'	'
Percentage of salary deferrals of the eligible annual salary	25.00%	'	'
Number of participants in the plan who self direct their contribution into investment option (more than)	143	'	'
Employee benefit plan assets	50,600,000	43,300,000	'
Employee benefit plan obligations	$59,600,000	$50,400,000	'

Schedule_II_Valuation_and_Qual1

Schedule II - Valuation and Qualifying Accounts (Allowances) (Details) (USD $)

3 Months Ended

12 Months Ended

12 Months Ended

In Thousands, except Per Share data, unless otherwise specified

Mar. 29, 2014

Dec. 28, 2013

Sep. 28, 2013

Jun. 29, 2013

Mar. 30, 2013

Dec. 29, 2012

Sep. 29, 2012

Jun. 30, 2012

Mar. 29, 2014

Mar. 30, 2013

Mar. 31, 2012

Mar. 29, 2014

Mar. 30, 2013

Mar. 31, 2012

Apr. 03, 2010

Mar. 29, 2014

Mar. 30, 2013

Mar. 31, 2012

Apr. 03, 2010

Allowance for Doubtful Accounts [Member]

Allowance for Doubtful Accounts [Member]

Allowance for Doubtful Accounts [Member]

Allowance for Doubtful Accounts [Member]

Allowance for Deferred Tax Assets [Member]

Allowance for Deferred Tax Assets [Member]

Allowance for Deferred Tax Assets [Member]

Allowance for Deferred Tax Assets [Member]

Valuation and Qualifying Accounts Disclosure [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Valuation Allowances and Reserves, Beginning of Year

'

'

'

'

'

'

'

'

'

'

'

$3,425

'

$3,446

$3,579

$26,401

'

$18,826

$11,814

Valuation Allowances And Reserves Additions

'

'

'

'

'

'

'

'

'

'

'

2

0

180

'

19,771

7,575

7,635

'

Valuation Allowances and Reserves, Deductions

'

'

'

'

'

'

'

'

'

'

'

72

[1]

21

[1]

313

[1]

'

3,168

[1]

0

[1]

623

[1]

'

Valuation Allowances and Reserves, End of Year

'

'

'

'

'

'

'

'

'

'

'

3,355

3,425

'

3,579

43,004

26,401

'

11,814

Supplementary Financial Data [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net revenues

617,823

[2]

586,816

[2]

598,937

[2]

578,955

[2]

532,168

[3]

509,767

[3]

543,933

[3]

582,784

[3]

2,382,531

2,168,652

2,240,736

'

'

'

'

'

'

'

'

Gross margin

417,878

[2]

406,024

[2]

416,121

[2]

399,255

[2]

351,579

[3]

339,274

[3]

356,220

[3]

384,373

[3]

1,639,278

1,431,446

1,454,658

'

'

'

'

'

'

'

'

Net income

156,027

[2]

175,877

[2]

141,461

[2]

157,023

[2]

130,620

[3]

103,648

[3]

123,437

[3]

129,831

[3]

630,388

487,536

530,079

'

'

'

'

'

'

'

'

Net income per common share:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Earnings Per Share, Basic

$0.58

[2],[4]

$0.66

[2],[4]

$0.53

[2],[4]

$0.59

[2],[4]

$0.50

[3],[5]

$0.40

[3],[5]

$0.47

[3],[5]

$0.49

[3],[5]

$2.37

$1.86

$2.01

'

'

'

'

'

'

'

'

Earnings Per Share, Diluted

$0.53

[2],[4]

$0.61

[2],[4]

$0.49

[2],[4]

$0.56

[2],[4]

$0.47

[3],[5]

$0.38

[3],[5]

$0.46

[3],[5]

$0.47

[3],[5]

$2.19

$1.79

$1.95

'

'

'

'

'

'

'

'

Shares used in per share calculations:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Weighted Average Number of Shares Outstanding, Basic

268,134

[2]

267,780

[2]

268,478

[2]

264,153

[2]

263,035

[3]

260,690

[3]

260,605

[3]

263,055

[3]

266,431

261,652

263,783

'

'

'

'

'

'

'

'

Weighted Average Number of Shares Outstanding, Diluted

294,536

[2]

288,195

[2]

290,685

[2]

280,291

[2]

277,090

[3]

271,174

[3]

270,265

[3]

273,820

[3]

287,396

272,573

272,157

'

'

'

'

'

'

'

'

Cash dividends per common share (in dollars per share)

$0.25

[2]

$0.25

[2]

$0.25

[2]

$0.25

[2]

$0.22

[3]

$0.22

[3]

$0.22

[3]

$0.22

[3]

'

'

'

'

'

'

'

'

'

'

'

Restructuring charges

'

'

'

'

'

'

'

'

0

0

3,369

'

'

'

'

'

'

'

'

Litigation charges

'

19,190

28,600

'

'

'

'

'

9,410

0

15,400

'

'

'

'

'

'

'

'

Gains (Losses) on Extinguishment of Debt

'

'

'

'

'

'

'

'

($9,848)

$0

$0

'

'

'

'

'

'

'

'

[1]

Represents amounts written off or released against the allowances accounts.

[2]

Xilinx uses a 52- to 53-week fiscal year ending on the Saturday nearest March 31. Fiscal 2014 was a 52-week year and each quarter was a 13-week quarter.

[3]

Xilinx uses a 52- to 53-week fiscal year ending on the Saturday nearest March 31. Fiscal 2013 was a 52-week year and each quarter was a 13-week quarter.

[4]

Income before income taxes for the second quarter of fiscal 2014 included litigation and contingencies charge of $28,600, for the third quarter of fiscal 2014 included reversal of litigation and contingencies charge of$19,190 and for the fourth quarter of fiscal 2014 included loss on extinguishment of convertible debentures of $9,848.

[5]

Net income per common share is computed independently for each of the quarters presented. Therefore, the sum of the quarterly per common share information may not equal the annual net income per common share.