Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Dec. 27, 2014	Dec. 28, 2013	Dec. 27, 2014	Dec. 28, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 168,466us-gaap_NetIncomeLoss	$ 175,877us-gaap_NetIncomeLoss	$ 513,593us-gaap_NetIncomeLoss	$ 474,361us-gaap_NetIncomeLoss
Other comprehensive income (loss), net of tax:
Change in net unrealized gains (losses) on available-for-sale securities	(409)	(2,901)	3,822	(16,831)
Reclassification adjustment for (gains) losses on available-for-sale securities	(1,868)	(21)	(3,187)	(188)
Change in net unrealized losses on hedging transactions	(3,896)	(96)	(6,957)	(251)
Reclassification adjustment for (gains) losses on hedging transactions	1,786	(259)	768	1,836
Cumulative translation adjustment, net	(1,475)	290	(1,882)	(774)
Other comprehensive income (loss)	(5,862)	(2,987)	(7,436)	(16,208)
Total comprehensive income	$ 162,604us-gaap_ComprehensiveIncomeNetOfTax	$ 172,890us-gaap_ComprehensiveIncomeNetOfTax	$ 506,157us-gaap_ComprehensiveIncomeNetOfTax	$ 458,153us-gaap_ComprehensiveIncomeNetOfTax

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.

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Amount after tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).

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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

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