Divestitures and Discontinued Operations (Discontinued Operations by Business Net of Tax) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued operations, net of tax	$ (12.3)	$ (10.2)	$ (6.7)	$ (49.7)
Integration business divestiture [Member]
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued operations, net of tax	(0.8)	(1.6)	(1.1)	(1.6)
Other Discontinued Operations [Member]
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued operations, net of tax	$ (11.5)	$ (8.6)	$ (5.6)	$ (48.1)