Divestitures and Discontinued Operations (Net Revenues and After-Tax Earnings) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Net revenues	$ 72.2		$ 143.6		$ 186.1
Discontinued operations, net of tax	(56.8)		(117.5)		(36.6)
Integrated Systems and Services divestiture [Member]
Net revenues	72.2		78.0		92.7
After-tax earnings (loss) from operations	(1.3)	[1]	(0.8)		(3.0)
Gain (loss) on sale, net of tax	(5.0)		0		0
Discontinued operations, net of tax	(6.3)		(0.8)		(3.0)
KOXKA Divestiture [Member]
Net revenues	0		56.7		82.5
After-tax earnings (loss) from operations	(3.3)		(53.1)	[2]	(17.7)
Gain (loss) on sale, net of tax	0		(0.9)		0
Discontinued operations, net of tax	(3.3)		(54.0)		(17.7)
Energy Systems Divestiture [Member]
Net revenues	0		8.9		10.9
After-tax earnings (loss) from operations	(0.4)		(14.4)	[3]	(4.3)
Gain (loss) on sale, net of tax	0.6		(3.2)		0
Discontinued operations, net of tax	$ 0.2		$ (17.6)		$ (4.3)

[1] WARNING: Unable to load text selection TextSelection:26607D2E381FAB3F85F0CF0006D420D3

[2] ncluded in discontinued operations for KOXKA for 2010 is an after-tax impairment loss of $53.9 million related to the write-down of the net assets to their estimated fair value. Also included in 2010 is a $12.2 million tax benefit resulting from a reduction in the Company’s deferred tax asset valuation allowance for net operating losses.

[3] Included in discontinued operations for Energy Systems in 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.