Acquisitions (Pro Forma Adjustments Affecting Net Earnings) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Acquisitions [Abstract]
Depreciation and amortization of purchased assets, pre-tax	$ (0.5)	$ (6.0)
Acquisition-related expenses, pre-tax	1.5	40.5
Restructuring and impairment charges, pre-tax	88.3	(108.6)
Inventory fair value adjustment, pre-tax	3.6	(3.8)
Other pro forma adjustments, pre-tax	(7.1)	4.0
Income taxes	$ (34.5)	$ 50.1