Net Income Per Common Share Net Income Per Common Share (Details 2) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016
Earnings Per Share [Abstract]
Net income		$ 167,532	$ 164,192	$ 334,777	$ 327,241
Weighted Average Number of Shares Outstanding, Basic		248,094	253,466	247,960	253,056
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements		2,532	2,126	2,949	2,319
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities	[1]	0	9,587	2,986	8,736
Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants		7,591	5,194	7,844	3,774
Weighted Average Number of Shares Outstanding, Diluted		258,217	270,373	261,739	267,885
Earnings Per Share, Basic		$ 0.68	$ 0.65	$ 1.35	$ 1.29
Earnings Per Share, Diluted		$ 0.65	$ 0.61	$ 1.28	$ 1.22

[1] Three Months Ended Six Months Ended(In thousands, except per share amounts)September 30, 2017 October 1, 2016 September 30, 2017 October 1, 2016Net income available to common stockholders$167,532 $164,192 $334,777 $327,241Weighted average common shares outstanding-basic248,094 253,466 247,960 253,056Dilutive effect of employee equity incentive plans2,532 2,126 2,949 2,319Dilutive effect of 2017 Convertible Notes— 9,587 2,986 8,736Dilutive effect of warrants7,591 5,194 7,844 3,774Weighted average common shares outstanding-diluted258,217 270,373 261,739 267,885Basic earnings per common share$0.68 $0.65 $1.35 $1.29Diluted earnings per common share$0.65 $0.61 $1.28 $1.22