Acquisitions (Pro Forma Adjustments Affecting Net Earnings) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Acquisitions [Abstract]
Depreciation and amortization of purchased assets, pre-tax		$ (0.9)
Acquisition-related expenses, pre-tax		0.3
Restructuring and impairment charges, pre-tax		(0.4)
Inventory fair value adjustment, pre-tax	0.3	(0.3)
Other pro forma adjustments, pre-tax	0.1	9.2
Income taxes	$ (0.1)	$ 1.6