Stock-Based Compensation Plans (Details 3) - Restricted Stock Units (RSUs) [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		12 Months Ended
		Mar. 31, 2018	Apr. 01, 2017	Apr. 02, 2016
Summary of restricted stock unit activity and related information
Number of Shares, Beginning balance		6,988	6,619	6,873
Number of Shares, Granted		3,718	3,398	3,088
Number of Shares, Vested	[1]	(3,016)	(2,619)	(2,691)
Number of Shares, Cancelled		(701)	(410)	(651)
Number of Shares, Ending balance		6,989	6,988	6,619
Number of Shares, Expected to vest		5,585
Weighted-Average Grant-Date Fair Value Per Share, Beginning balance (in dollars per share)		$ 42.93	$ 40.74	$ 39.07
Weighted-Average Grant-Date Fair Value Per Share, Granted (in dollars per share)		60.18	44.38	41.19
Weighted-Average Grant-Date Fair Value Per Share, Vested (in dollars per share)	[1]	43.30	39.49	37.23
Weighted-Average Grant-Date Fair Value Per Share, Cancelled (in dollars per share)		48.16	41.63	39.77
Weighted-Average Grant-Date Fair Value Per Share, Ending balance (in dollars per share)		51.39	$ 42.93	$ 40.74
Weighted-Average Grant-Date Fair Value Per Share, Expected to vest (in dollars per share)		$ 51.46
Weighted Average Remaining Contractual Term (in years)		2 years 4 months 13 days
Weighted Average Remaining Contractual Term, Expected to vest (in years)		2 years 4 months 10 days
Aggregate Intrinsic Value	[2]	$ 504,733
Aggregate Intrinsic Value, Expected to vest	[2]	$ 403,490

[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 31, 2018 of $72.24, multiplied by the number of RSUs outstanding or expected to vest as of March 31, 2018.