Convertible Debentures and Revolving Credit Facility (Narrative) (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	12 Months Ended					3 Months Ended	12 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Apr. 02, 2011	Mar. 30, 2013 2.625% Senior Convertible Debentures [Member]	Mar. 31, 2012 2.625% Senior Convertible Debentures [Member]	Mar. 30, 2013 3.125% Junior Convertible Debentures [Member]	Mar. 30, 2013 3.125% Junior Convertible Debentures [Member]	Mar. 31, 2012 3.125% Junior Convertible Debentures [Member]
Debt Instrument [Line Items]
Stated Interest rate of debentures	3.125%			2.625%		3.125%	3.125%
Principal amount of debentures				$ 600,000,000	$ 600,000,000	$ 689,635,000	$ 689,635,000	$ 689,635,000
Convertible debt, conversion ratio				33.3681			33.9021
Base conversion, block amount of senior convertible debenture				1,000
Convertible debt, conversion price				$ 29.97		$ 29.50	$ 29.50
Debenture, remaining discount amortization period				4 years 2 months 12 days			24 years
Principal required to be repurchased upon fundamental change (percent)				100.00%		100.00%	100.00%
Maximum number of common shares to be purchased under call option				20.0
Purchase of call options	0	0	112,319,000
Warrants, number of shares the holders have the right to purchase				20.0
Warrants, exercise price				42.46
Proceeds from issuance of warrants	0	0	46,908,000
Base conversion, block amount of junior convertible debenture							1,000
Effective interest rate						7.20%	7.20%
Minimum closing price of common stock as percentage of conversion price							130.00%
Number of minimum trading days for closing price of common stock							20 days
Number of consecutive trading days for closing price of common stock							30 days
Revolving credit facility, maximum borrowing capacity						250,000,000	250,000,000
Revolving credit facility, average outstanding amount						$ 0