Condensed Consolidated Statements of Stockholders' Equity Statement - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]
Common Stock Outstanding, beginning balance (in shares) at Mar. 31, 2018		253,377
Beginning balance at Mar. 31, 2018	$ 2,360,353	$ 2,534	$ 878,672	$ 1,513,656	$ (34,509)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	645,109			645,109
Other comprehensive income	(5,683)				(5,683)
Tax withholding related to vesting of restricted stock units and other (in shares)		2,174
Issuance of common shares under employee stock plans, net	(23,593)	$ 22	(23,615)
Repurchase and retirement of common stock (in shares)		(2,436)
Repurchase and retirement of common stock	(161,549)	$ (25)	(21,508)	(140,016)
Stock-based compensation expense	109,194		109,194
Cash dividends declared	(272,860)			(272,860)
Common Stock Outstanding, ending balance (in shares) at Dec. 29, 2018		253,115
Ending balance at Dec. 29, 2018	$ 2,637,195	$ 2,531	942,743	$ 1,723,714	(31,793)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared (in dollars per share)	$ 1.08			$ (0.72)
Common Stock Outstanding, beginning balance (in shares) at Sep. 29, 2018		253,019
Beginning balance at Sep. 29, 2018	$ 2,444,886	$ 2,530	906,618	$ 1,576,476	(40,738)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	239,360			239,360
Other comprehensive income	8,945				8,945
Tax withholding related to vesting of restricted stock units and other (in shares)		110
Issuance of common shares under employee stock plans, net	(2,515)	$ 1	(2,516)
Repurchase and retirement of common stock (in shares)		(14)
Repurchase and retirement of common stock	(1,015)	$ 0	0	(1,015)
Stock-based compensation expense	38,641		38,641
Cash dividends declared	(91,107)			(91,107)
Common Stock Outstanding, ending balance (in shares) at Dec. 29, 2018		253,115
Ending balance at Dec. 29, 2018	$ 2,637,195	$ 2,531	942,743	$ 1,723,714	(31,793)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared (in dollars per share)	$ 0.36			$ (0.36)
Common Stock Outstanding, beginning balance (in shares) at Mar. 30, 2019		253,891
Beginning balance at Mar. 30, 2019	$ 2,861,509	$ 2,539	1,005,411	$ 1,876,969	(23,410)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	630,463			630,463
Other comprehensive income	11,305				11,305
Tax withholding related to vesting of restricted stock units and other (in shares)		2,171
Issuance of common shares under employee stock plans, net	(55,541)	$ 22	(55,563)
Repurchase and retirement of common stock (in shares)		(7,227)
Repurchase and retirement of common stock	(750,818)	$ (72)	(68,900)	(681,846)
Stock-based compensation expense	142,732		142,732
Cash dividends declared	(280,376)			(280,376)
Additional tax benefit recognized relating to fiscal 2014 redemption of convertible debt	81,888		81,888
Common Stock Outstanding, ending balance (in shares) at Dec. 28, 2019		248,835
Ending balance at Dec. 28, 2019	$ 2,641,162	$ 2,489	1,105,568	$ 1,545,210	(12,105)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared (in dollars per share)	$ 1.11			$ (0.74)
Common Stock Outstanding, beginning balance (in shares) at Sep. 28, 2019		251,466
Beginning balance at Sep. 28, 2019	$ 2,695,905	$ 2,515	978,222	$ 1,732,304	(17,136)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	162,012			162,012
Other comprehensive income	5,031				5,031
Tax withholding related to vesting of restricted stock units and other (in shares)		153
Issuance of common shares under employee stock plans, net	(3,565)	$ 2	(3,567)
Repurchase and retirement of common stock (in shares)		(2,784)
Repurchase and retirement of common stock	(257,335)	$ (28)	(1,132)	(256,175)
Stock-based compensation expense	50,157		50,157
Cash dividends declared	(92,931)			(92,931)
Additional tax benefit recognized relating to fiscal 2014 redemption of convertible debt	81,888		81,888
Common Stock Outstanding, ending balance (in shares) at Dec. 28, 2019		248,835
Ending balance at Dec. 28, 2019	$ 2,641,162	$ 2,489	$ 1,105,568	$ 1,545,210	$ (12,105)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared (in dollars per share)	$ 0.37			$ (0.37)