Fair Value Measurements and Risk - Carrying Amounts and Fair Values of Debt (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt		$ 1,603.0		$ 1,603.0		$ 1,584.1
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt		1,603.0		1,603.0		1,584.1
Other borrowings		120.1		120.1		110.2
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt		1,676.7		1,676.7		1,633.2
Other borrowings		120.1		120.1		110.2
Term Loan B (USD)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unamortized discount and debt issuance costs		5.1		5.1		5.7
Term Loan B (USD) | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt	[1]	403.3		403.3		402.7
Term Loan B (USD) | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt		402.8		402.8		408.2
Term Loan B (EUR)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unamortized discount and debt issuance costs		1.1		1.1		1.3
Term Loan B (EUR) | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt	[1]	89.9		89.9		82.5
Term Loan B (EUR) | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt		89.9		89.9		82.0
5.125% Senior Notes, Due 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unamortized discount and debt issuance costs		6.6		6.6		7.3
Total debt		$ 693.4		$ 693.4		$ 692.7
Interest rate (percent)		5.125%		5.125%		5.125%
5.125% Senior Notes, Due 2021 | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt	[2]	$ 693.4		$ 693.4		$ 692.7
5.125% Senior Notes, Due 2021 | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt		745.4		745.4		721.3
5.625% Senior Notes, Due 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unamortized discount and debt issuance costs		3.7		3.7		4.0
Total debt		$ 296.3		$ 296.3		$ 296.0
Interest rate (percent)		5.625%		5.625%		5.625%
5.625% Senior Notes, Due 2024 | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt	[2]	$ 296.3		$ 296.3		$ 296.0
5.625% Senior Notes, Due 2024 | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt		318.5		318.5		$ 311.5
Net Investment Hedging
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		$ 0.0	$ 0.0	$ 0.0	$ 0.0

[1] (2)Carrying amounts are net of unamortized debt issuance costs and discounts of $5.1 million and $1.1 million as of June 30, 2017, and $5.7 million and $1.3 million as of December 31, 2016, related to the U.S. dollar term loan and euro term loan, respectively.

[2] (1)Carrying amounts are net of unamortized debt issuance costs of $6.6 million and $3.7 million as of June 30, 2017, and $7.3 million and $4.0 million as of December 31, 2016, related to the 5.125% senior notes due 2021 and 5.625% senior notes due 2024, respectively.