Income Taxes (Textuals) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accrued liabilities for interest and penalties	$ 0.2	$ 0.1
Total gross unrecognized tax benefits	3.9	3.2	$ 6.2
Estimated reduction in the liability for unrecognized tax benefits	0.4
Discrete tax charge, Tax Cuts and Jobs Act of 2017	2.5	48.8
Income tax expense (benefit)	41.4	80.9	54.4
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Transition Tax for Accumulated Foreign Earnings, Provisional Income Tax Expense	$ 20.4	27.9
Net impact to the 2018 effective tax rate	1.45%
Discrete tax charge, change in enacted rate, domestic		11.4
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount	$ 7.5
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	4.0
Tax on undistributed earnings of subsidiaries	6.6	9.8
Restructuring and related charges	9.1	0.0	26.4
Discrete tax benefit, restructuring charges			9.0
Pension curtailment gain	0.0	0.0	2.1
Discrete tax charge, pension curtailment			0.8
Discrete tax charge, change in enacted rate, foreign			$ 1.0
Undistributed earnings of foreign subsidiaries	79.7
Accounting Standards Update 2016-09 [Member]
Income tax expense (benefit)	$ 14.3	$ 33.1