Pension, Post-Retirement and Post-Employment Plans - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Domestic
Net periodic benefit expense:
Service cost	$ 0.0	$ 0.0	$ 0.0
Interest cost	10.1	6.8	6.9
Plan curtailment	0.0	0.0	0.0
Plan settlements	22.9	0.0	0.0
Domestic | Pension & SERP Benefits
Net periodic benefit expense:
Service cost	0.0	0.0	0.0
Interest cost	10.1	6.8	6.9
Expected return on plan assets	(11.6)	(9.9)	(9.7)
Amortization of prior service cost	0.0	0.0	0.0
Amortization of actuarial net loss	0.0	0.0	0.0
Plan curtailment	0.0	0.0	0.0
Plan settlements	1.7	0.0	0.0
Net periodic cost (benefit)	0.2	(3.1)	(2.8)
Foreign
Net periodic benefit expense:
Service cost	1.8	1.4	0.8
Interest cost	3.1	2.8	3.0
Plan curtailment	0.1	0.0	0.0
Plan settlements	2.5	0.0	0.5
Foreign | Pension & SERP Benefits
Net periodic benefit expense:
Service cost	1.8	1.4	0.8
Interest cost	3.1	2.8	3.0
Expected return on plan assets	(2.6)	(2.7)	(3.5)
Amortization of prior service cost	0.6	0.0	0.0
Amortization of actuarial net loss	0.2	0.0	0.0
Plan curtailment	(0.1)	0.0	0.0
Plan settlements	0.2	0.0	0.0
Net periodic cost (benefit)	$ 3.2	$ 1.5	$ 0.3