Stock-Based Compensation Plans (Details 2) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Mar. 28, 2015		Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, closing price per share	$ 42.32
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Vested	3,173		4,935
Number of Shares, Expected to vest	70
Number of Shares, Total vested and expected to vest	3,243
Number of Shares, Total outstanding	3,247		5,280	12,753	17,788
Weighted-Average Exercise Price Per Share, Vested (in dollars per share)	$ 24.59		$ 24.87
Weighted-Average Exercise Price Per Share, Expected to vest (in dollars per share)	$ 34.32
Weighted-Average Exercise Price Per Share, Total vested and expected to vest (in dollars per share)	$ 24.80
Weighted-Average Exercise Price Per Share, Total outstanding (in dollars per share)	$ 24.81		$ 25.22	$ 28.01	$ 28.32
Weighted-Average Remaining Contractual Term, Vested (in years)	1 year 6 months 3 days
Weighted Average Remaining Contractual Term, Expected to vest (in years)	3 years 9 months 28 days
Weighted Average Remaining Contractual Term, Total vested and expected to vest (in years)	1 year 6 months 22 days
Weighted Average Remaining Contractual Term, Total outstanding (in years)	1 year 6 months 25 days
Aggregate Intrinsic Value, Vested	$ 56,276	[1]
Aggregate Intrinsic Value, Expected to vest	561	[1]
Aggregate Intrinsic Value, Total vested and expected to vest	56,837	[1]
Aggregate Intrinsic Value, Total outstanding	$ 56,873	[1]

[1] These amounts represent the difference between the exercise price and $42.32, the closing price per share of Xilinx’s stock on March 28, 2015, for all in-the-money options outstanding.