Debt - Components of Debt (Details) - USD ($) $ in Millions		Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Debt payable—unconsolidated affiliate		$ 41.4	$ 39.5
Deferred payment obligation		0.0	30.0
Total debt		1,568.4	1,584.1
Debt payable within one year		46.5	76.5
Debt payable after one year		$ 1,521.9	$ 1,507.6
Weighted average interest rates on total debt		4.70%	4.60%
5.125% Senior Notes, Due 2021
Debt Instrument [Line Items]
Interest rate (percent)		5.125%	5.125%
Unamortized discount and debt issuance costs		$ 6.2	$ 7.3
Total debt		693.8	692.7
Term Loan B (USD)
Debt Instrument [Line Items]
Unamortized discount and debt issuance costs		4.7	5.7
Total debt		$ 403.7	$ 402.7
5.625% Senior Notes, Due 2024
Debt Instrument [Line Items]
Interest rate (percent)		5.625%	5.625%
Unamortized discount and debt issuance costs		$ 3.6	$ 4.0
Total debt		296.4	296.0
Term Loan B (EUR)
Debt Instrument [Line Items]
Unamortized discount and debt issuance costs		1.0	1.3
Total debt		93.1	82.5
Other borrowings
Debt Instrument [Line Items]
Total debt	[1]	$ 40.0	$ 40.7

[1] (1) Represents borrowings under various lines of credit and other borrowings, primarily by non-U.S. subsidiaries.