Income Taxes - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Examination [Line Items]
Undistributed earnings of foreign subsidiaries	$ 337.0	$ 337.0	$ 390.0
Provision for tax on undistributed foreign earnings	29.7	(26.8)	(5.0)	$ 3.7
Valuation allowance	363.2	363.2	303.8
Increase in valuation allowance		(59.4)	(284.1)
State operating loss carry forward	380.0	380.0
State tax credits	777.0	777.0
Foreign operating loss carry forward	697.0	697.0
Deferred tax asset	589.9	589.9	570.1
Valuation allowance on foreign tax credit carryovers	24.2	24.2
Research and development credits	16.7	16.7
Alternative minimum tax credits	1.8	1.8
State tax credits (net of federal tax)	3.5	$ 3.5
Tax carry-forward period		10 years
Unrecognized tax benefit	128.3	$ 128.3	112.2	27.7	$ 25.6
Reduction in effective tax rate	40.1	40.1
Total unrecognized benefits expected to revers within the next twelve months	11.4	11.4
Interest and penalties related to unrecognized tax benefits		(5.5)	4.9	$ 1.0
Accrued interest and penalties related to unrecognized tax benefits	13.3	13.3	17.5
Domestic
Income Tax Examination [Line Items]
Provision for tax on undistributed foreign earnings	4.8
Net deferred tax assets	133.0	133.0
State and Local Jurisdiction
Income Tax Examination [Line Items]
Deferred tax asset	37.7	37.7
Foreign
Income Tax Examination [Line Items]
Provision for tax on undistributed foreign earnings	24.9
Deferred tax asset	189.0	189.0
Foreign Net Operating Loss Carry Forwards
Income Tax Examination [Line Items]
Valuation allowance	$ 161.0	161.0
Deferred Tax Asset, Valuation Allowance Overstatement
Income Tax Examination [Line Items]
Quantifying misstatement		99.8
Valuation Allowance of Deferred Tax Assets
Income Tax Examination [Line Items]
Charges to costs and expense		(68.4)	(72.6)
Other adjustments to valuation allowance		$ 9.0	$ (211.5)