Discontinued Operations (Narrative) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		1 Months Ended	3 Months Ended	12 Months Ended
	Mar. 29, 2013	Mar. 30, 2012	Jan. 31, 2012 ASI And KEO	Mar. 30, 2012 ASI And KEO	Dec. 31, 2011 ASI And KEO
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of business	$ 0	$ 337.5	$ 337.0
Revenue of divested business	4,444.7	4,316.2			275.0
After-tax gain on sale of business				93.7
After-tax gain on sale of business, per diluted share (dollars per share)				$ 0.13
Loss from business during phase-out period, net of tax				$ 0.8