Net Income Per Common Share Net Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jul. 01, 2017
Debt Conversion [Line Items]
Net income	$ 190,038	$ 157,244	[1]
Weighted Average Number of Shares Outstanding, Basic	252,682	247,911
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	3,253	3,817
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities and Warrants	0	14,069
Weighted Average Number of Shares Outstanding, Diluted	255,935	265,797
Antidilutive shares excluded from computation of dilutive net income per common share	366	152
Earnings Per Share, Basic	$ 0.75	$ 0.63	[1]
Earnings Per Share, Diluted	$ 0.74	$ 0.59	[1]
Two And Six Two Five Percent Senior Convertible Debentures [Member]
Debt Conversion [Line Items]
Debt Instrument, Face Amount		$ 600,000
Debt Instrument, Interest Rate, Stated Percentage		2.625%
Debt Instrument, Maturity Date		Jun. 15, 2017

[1] Prior year balances have been restated to reflect the retrospective application of the new revenue recognition accounting standard. Please refer to "Note 2. Recent Accounting Changes and Accounting Pronouncements."