Income Taxes (Details) - USD ($) $ in Millions		1 Months Ended	3 Months Ended		4 Months Ended
	Jan. 01, 2018	Feb. 28, 2018	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018
Operating Loss Carryforwards [Line Items]
Effective income tax rate reconciliation, percent			22.00%	26.00%
Tax Cuts And Jobs Act Of 2017, incomplete accounting, provisional income tax expense (benefit)					$ (6.2)
Tax Cuts And Jobs Act Of 2017, change in tax rate, income tax (expense) Benefit			$ (0.5)		(10.8)
Tax Cuts And Jobs Act Of 2017, transition tax for accumulated foreign earnings, income tax expense (benefit)			0.8		$ 4.6
Tax Cuts And Jobs Act Of 2017, incomplete accounting, global intangible low-taxed income, provisional income tax expense (benefit)			1.9
Tax Cuts and Jobs Act of 2017, reclassification from AOCI to retained earnings		$ 10.9
Accounting Standards Update 2016-16
Operating Loss Carryforwards [Line Items]
Deferred tax assets, net	$ 2.9
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Effective Income Tax Rate Reconciliation, change in enacted tax rate, amount			$ 0.1
Federal Ministry of Finance, Germany | Accounting Standards Update 2016-16
Operating Loss Carryforwards [Line Items]
Increase (decrease) in prepaid taxes	$ 3.6