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Pension and Other Post-Employment Plans - Schedule of Net Periodic Pension Expense (Benefit) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]      
Pension settlement charges $ 0.0 $ 0.0 $ 6.1
U.S. Benefit Plan      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 0.0 0.0 0.0
Interest cost 6.8 6.4 7.6
Expected return on plan assets (8.7) (8.7) (9.6)
Amortization of prior service costs 0.0 0.0 0.0
Amortization of actuarial losses 2.6 3.0 2.5
Pension settlement charges 0.0 0.0 6.1
Net periodic pension expense (benefit) 0.7 0.7 6.6
Non-U.S. Benefit Plan      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 0.2 0.2 0.2
Interest cost 1.4 1.3 1.4
Expected return on plan assets (2.0) (2.2) (2.1)
Amortization of prior service costs 0.1 0.0 0.0
Amortization of actuarial losses 0.7 0.6 0.6
Pension settlement charges 0.0 0.0 0.0
Net periodic pension expense (benefit) $ 0.4 $ (0.1) $ 0.1