Common Stock Repurchase Program (Details) (USD $) In Millions, except Share data, unless otherwise specified			1 Months Ended	9 Months Ended		31 Months Ended	1 Months Ended	3 Months Ended	5 Months Ended	9 Months Ended
	Dec. 29, 2012	Mar. 31, 2012	Jun. 30, 2010 Repurchase Program 2010 [Member]	Dec. 29, 2012 Repurchase Program 2010 [Member]	Dec. 31, 2011 Repurchase Program 2010 [Member]	Dec. 29, 2012 Repurchase Program 2010 [Member]	Aug. 31, 2012 Repurchase Program Two Thousand Twelve [Member]	Dec. 29, 2012 Repurchase Program Two Thousand Twelve [Member]	Dec. 29, 2012 Repurchase Program Two Thousand Twelve [Member]	Dec. 29, 2012 Repurchase Program Two Thousand Twelve [Member]
Accelerated Share Repurchases [Line Items]
Amount authorized for common stock repurchase			$ 500.0				$ 750.0
Total amount of common shares repurchased				187.1	219.6	500.0			10.6	10.6
Total amount available for future repurchases								$ 739.4
Treasury Stock, Shares	0	0
Number of common shares repurchased				5,800,000	7,000,000					322,000