Income Taxes (Details Textual) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Excluding discrete items [Line Items]
Provision (benefit) for income taxes	$ 28.3	$ 15.5
Effective Income Tax Rate Reconciliation, Percent	26.00%	28.90%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent		35.00%
Tax on Unremitted Foreign Earnings			$ 25.2
Deferred Income Tax Expense (Benefit)	$ (0.2)	$ 1.5
The Tax Cut and Jobs Act of 2018 [Member]
Excluding discrete items [Line Items]
Deferred Income Tax Expense (Benefit)			$ 10.1