Income Taxes - Additional Information (Details) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 31, 2018 USD ($) Jurisdiction	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Income Tax Disclosure [Abstract]
Provisional income tax expense (benefit)	$ 107.8
Deferred tax asset, provisional income tax expense		$ 81.1
Valuation allowance		26.1
Withholding tax on unremitted earnings		0.6
U.S. tax reform		12.5	$ (107.8)	$ 0.0
Tax loss carryforwards related to the impact of the Netherlands enacted rate change		$ 113.6	$ 155.7
Number of foreign income tax jurisdictions | Jurisdiction		45