Marketable Securities (Schedule of Cost and Estimated Fair Value of Available-for-sale Securities by Contractual Maturity) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 28, 2015	Mar. 29, 2014
Marketable Securities [Abstract]
Within 1 year, Amortized Cost	$ 124,275	$ 263,418
After 1 year, Amortized Cost	60,116	89,422
Within 1 year, Estimated Fair Value	124,246	263,417
After 1 year, Estimated Fair Value	60,072	89,243
Amortized Cost	184,391	352,840
Estimated Fair Value	$ 184,318	$ 352,660

Amount of available-for-sale debt securities at cost, net of adjustments, maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

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Amount of available-for-sale debt securities at fair value maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year.

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Amount of available-for-sale debt securities at cost, net of adjustments, maturing in the next fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

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Amount of available-for-sale debt securities at fair value maturing in the next fiscal year following the latest fiscal year.

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Amount of debt securities categorized neither as held-to-maturity nor trading.

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