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Stockholders' Equity (Details) (USD $)
12 Months Ended
Mar. 28, 2015
Mar. 29, 2014
Mar. 30, 2013
Aug. 13, 2012
Nov. 17, 2014
Share Repurchases [Line Items]          
Preferred stock, shares authorized 2,000,000us-gaap_PreferredStockSharesAuthorized 2,000,000us-gaap_PreferredStockSharesAuthorized      
Preferred stock, shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued      
Preferred stock, shares outstanding 0us-gaap_PreferredStockSharesOutstanding 0us-gaap_PreferredStockSharesOutstanding      
Treasury shares 0us-gaap_TreasuryStockShares 0us-gaap_TreasuryStockShares      
Stock Repurchased During Period, Shares 15,300,000us-gaap_StockRepurchasedDuringPeriodShares 5,200,000us-gaap_StockRepurchasedDuringPeriodShares      
Stock Repurchased and Retired During Period, Value $ 649,990,000us-gaap_StockRepurchasedAndRetiredDuringPeriodValue $ 242,094,000us-gaap_StockRepurchasedAndRetiredDuringPeriodValue $ 197,689,000us-gaap_StockRepurchasedAndRetiredDuringPeriodValue    
Repurchase Program 2012 [Member]          
Share Repurchases [Line Items]          
Amount authorized for common stock repurchase       750,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount1
/ us-gaap_AcceleratedShareRepurchasesDateAxis
= xlnx_RepurchaseProgramTwoThousandTwelveMember
 
Total amount available for future repurchases 0us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
/ us-gaap_AcceleratedShareRepurchasesDateAxis
= xlnx_RepurchaseProgramTwoThousandTwelveMember
       
Repurchase Program Two Thousand Fourteen [Member]          
Share Repurchases [Line Items]          
Amount authorized for common stock repurchase         800,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount1
/ us-gaap_AcceleratedShareRepurchasesDateAxis
= xlnx_RepurchaseProgramTwoThousandFourteenMember
Total amount available for future repurchases 647,400,000us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
/ us-gaap_AcceleratedShareRepurchasesDateAxis
= xlnx_RepurchaseProgramTwoThousandFourteenMember
       
Repurchases of Common Stock $ 152,600,000us-gaap_StockRepurchasedDuringPeriodValue
/ us-gaap_AcceleratedShareRepurchasesDateAxis
= xlnx_RepurchaseProgramTwoThousandFourteenMember