Divestitures and Discontinued Operations (Net Revenues and After-Tax Earnings) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Net revenues	$ 0	$ 18.4	$ 0	$ 52.9
Discontinued operations, net of tax	(12.3)	(10.2)	(6.7)	(49.7)
Integration business divestiture [Member]
Net revenues	0	18.4	0	52.9
After-tax earnings (loss) from operations	(0.8)	(1.6)	(1.1)	(1.6)
Gain (loss) on sale, net of tax	0	0	0	0	(5.0)
Discontinued operations, net of tax	$ (0.8)	$ (1.6)	$ (1.1)	$ (1.6)