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Schedule of Income Tax Provision (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Components Of Income Tax Expense Benefit Continuing Operations Abstract
Current: Federal	$ 0.5	$ (60.7)	$ (47.9)
Current: State	(1.5)	(0.4)	(4.0)
Current: Foreign	14.4	9.4	9.8
Total Current	13.4	(51.7)	(42.1)
Deferred: Federal	(115.8)	(90.9)	34.1
Deferred: State	(3.5)	30.4	(0.2)
Deferred: Foreign	(1.0)	0.1	(0.5)
Total Deferred	(120.3)	(60.4)	33.4
Income tax benefit from continuing operations	(106.9)	(112.1)	(8.7)
Income tax benefit from discontinued operations	0.0	0.0	(0.3)
Total company income tax benefit	$ (106.9)	$ (112.1)	$ (9.0)

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