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Represents the period of cumulative pre-tax loss position.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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No definition available.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income tax settlements. Including, but not limited to, domestic tax settlement, foreign tax settlement, state and local tax settlement, and other tax settlements.

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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Income Taxes
Net deferred income tax liability	$ 120.2		$ 120.2		$ 107.9
Valuation allowance	817.9		$ 817.9		$ 844.3
Income tax benefit from settlement of uncertain tax positions	$ 9.8
Percent of pretax income
Actual effective income tax rate (as a percent)	(25.56%)	87.84%	8.00%	86.41%
Correction of the failed spin-off-leaseback accounting treatment
Income Taxes
Period of cumulative pre-tax loss position			3 years
Rocket Games
Income Taxes
Income tax benefit due to change in valuation allowance after recording acquired deferred tax liabilities	$ 12.0