Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Mar. 31, 2018	Sep. 30, 2018
Retained Earnings Adjustments [Line Items]
Unrecognized tax benefits		$ 0.3
Deferred Other Tax Expense (Benefit)		4.3
Tax Cuts and Jobs Act of 2017, Change in Tax Rate, Income Tax Expense (Benefit)		3.0
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act of 2017, Transition Tax on Accumulated Foreign Earnings, Amount		2.7
Tax Cuts and Jobs Act of 2017, Change in Tax Rate, Deferred Tax Asset, Income Tax Expense		$ 0.1
Accounting Standards Update 2016-16 [Member]
Retained Earnings Adjustments [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax	$ 5.1
Accounting Standards Update 2018-02 [Member]
Retained Earnings Adjustments [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax	$ (22.7)