Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 171,516	$ 141,461	$ 345,127	$ 298,484
Other comprehensive income (loss), net of tax:
Change in net unrealized gains (losses) on available-for-sale securities	(3,728)	2,995	4,231	(13,930)
Reclassification adjustment for (gains) losses on available-for-sale securities	(927)	155	(1,318)	(167)
Change in net unrealized gains (losses) on hedging transactions	(3,602)	1,353	(3,060)	(155)
Reclassification adjustment for (gains) losses on hedging transactions	(211)	1,389	(1,018)	2,095
Cumulative translation adjustment, net	(578)	(371)	(407)	(1,064)
Other comprehensive income (loss)	(9,046)	5,521	(1,572)	(13,221)
Total comprehensive income	$ 162,470	$ 146,982	$ 343,555	$ 285,263