Divestitures and Discontinued Operations (Schedule of Other Discontinued Operations) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Discontinued operations, net of tax	$ (56.8)	$ (117.5)	$ (36.6)
Other Discontinued Operations [Member]
Retained costs, net of tax	(31.8)	(45.0)	12.4
Net gain (loss) on disposals, net of tax	(15.6)	(0.1)	(24.0)
Discontinued operations, net of tax	$ (47.4)	$ (45.1)	$ (11.6)