Divestitures and Discontinued Operations (Net Revenues and After-Tax Earnings) (Details) (USD $) In Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010		Sep. 30, 2011	Sep. 30, 2010
Net revenues	$ 0	$ 24.2		$ 0	$ 62.4
Discontinued operations, net of tax	(8.6)	(39.5)		(48.1)	(117.7)
Energy Systems Divestiture [Member]
Net revenues	0	3.9		0	5.7
After-tax earnings (loss) from operations	(0.3)	(9.5)	[1]	0	(12.5)	[1]
Gain (loss) on sale, net of tax	(0.2)	0		0	0
Discontinued operations, net of tax	(0.5)	(9.5)		0	(12.5)
Discontinued Operation, After-Tax Impairment Loss		8.3
KOXKA Divestiture [Member]
Net revenues	0	20.3		0	56.7
After-tax earnings (loss) from operations	(0.3)	(19.5)	[2]	(1.0)	(68.9)	[2]
Gain (loss) on sale, net of tax	0	0		0	0
Discontinued operations, net of tax	(0.3)	(19.5)		(1.0)	(68.9)
Discontinued Operation, After-Tax Impairment Loss		$ 15.1			$ 53.9

[1] Included in discontinued operations for Energy Systems for the three and nine months ended September 30, 2010 is an after-tax impairment loss of $8.3 million related to the initial write-down of the net assets to their estimated fair value.

[2] Included in discontinued operations for KOXKA for the three and nine months ended September 30, 2010 is an after-tax impairment loss of $15.1 million and $53.9 million, respectively, related to the write-down of the net assets to their estimated fair value.