Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Fair Value Measurements (Details Textual) (USD $)			1 Months Ended
Fair Value Measurements (Details Textual) (USD $)	Sep. 28, 2013	Mar. 30, 2013	Mar. 31, 2007 3.125% Junior Convertible Debentures [Member]	Sep. 28, 2013 3.125% Junior Convertible Debentures [Member]	Sep. 28, 2013 2.625% Senior Convertible Debentures [Member]	Sep. 28, 2013 Auction Rate Securities [Member]	Mar. 30, 2013 Auction Rate Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	$ 3,656,386,000	$ 3,289,221,000				$ 22,636,000	$ 28,700,000
Debt Instruments [Abstract]
Interest rate of debentures	3.125%		3.125%		2.625%
Convertible debentures due date			Mar. 15, 2037
Fair value of debentures				$ 1,110,000,000	$ 973,800,000