Income Taxes - Schedule of Income Taxes and Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income before income taxes:
U.S.	$ 222.9	$ 155.5	$ 149.1
International	110.6	167.7	188.5
Income before income taxes, and equity in earnings of affiliated companies	333.5	323.2	337.6
Current:
U.S.	18.3	18.9	(9.5)
International	14.9	20.3	37.1
Current provision for income taxes	33.2	39.2	27.6
Deferred:
U.S.	26.8	(1.9)	54.3
International	2.5	5.2	8.4
Deferred provision for income taxes	29.3	3.3	62.7
Total provision for income taxes	$ 62.5	$ 42.5	$ 90.3