Income Taxes (Details Textual) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Excluding discrete items [Line Items]
Provision (benefit) for income taxes	$ 25.0	$ 21.1	$ 83.5	$ 28.5
Effective Income Tax Rate Reconciliation, Percent	25.70%	28.10%	25.40%	14.10%
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)			$ 2.2	$ 7.5
The Tax Cut and Jobs Act of 2018 [Member]
Excluding discrete items [Line Items]
Deferred Income Tax Expense (Benefit)					$ 10.1
Restatement Adjustment [Member]
Excluding discrete items [Line Items]
Income Tax Examination, Increase (Decrease) in Liability from Prior Year			1.9
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount			$ 2.5