Income Taxes (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended																12 Months Ended
	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.