Postretirement and Other Benefits (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
United States
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amortization of accumulated other comprehensive loss related to benefit plans	$ 3.2
United States | Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	0.0	$ 0.0
Interest cost	0.9	1.2
Expected return on plan assets	(1.2)	(1.5)
Amortizations and other	0.8	0.5
Net periodic benefit cost	0.5	0.2
United States | OPEB Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	0.0	0.0
Interest cost	0.0	0.0
Expected return on plan assets	0.0	0.0
Amortizations and other	0.0	0.0
Net periodic benefit cost	0.0	0.0
French
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amortization of accumulated other comprehensive loss related to benefit plans	0.9
French | Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	0.3	0.2
Interest cost	0.0	0.1
Expected return on plan assets	0.0	0.0
Amortizations and other	0.3	0.2
Net periodic benefit cost	$ 0.6	$ 0.5