Employee Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Pension Plans | U.S. Pension Plans
Components of periodic benefit costs
Service cost - benefits earned during the period	$ 0.0	$ 0.0	$ 0.0	$ 0.0
Interest cost of projected benefit obligations	1.3	1.3	3.9	3.9
Expected return on plan assets	(1.1)	(1.5)	(3.3)	(4.5)
Amortization of prior service cost	0.0	0.0	0.0	0.0
Amortization of actuarial net loss	0.8	0.8	2.4	2.4
Pension settlement charge	0.0	4.5	0.0	4.5
Net periodic benefit costs	1.0	5.1	3.0	6.3
Pension Plans | Non-U.S. Pension Plans
Components of periodic benefit costs
Service cost - benefits earned during the period	0.5	0.5	1.5	1.5
Interest cost of projected benefit obligations	0.5	0.5	1.5	1.5
Expected return on plan assets	(0.3)	(0.4)	(0.9)	(1.2)
Amortization of prior service cost	0.0	0.0	0.0	0.0
Amortization of actuarial net loss	0.3	0.4	0.9	1.2
Pension settlement charge	0.0	0.0	0.0	0.0
Net periodic benefit costs	1.0	1.0	3.0	3.0
Postretirement Health and Other Plans
Components of periodic benefit costs
Service cost - benefits earned during the period	0.1	0.1	0.3	0.3
Interest cost of projected benefit obligations	0.1	0.2	0.5	0.6
Expected return on plan assets	0.0	0.0	0.0	0.0
Amortization of prior service cost	(0.7)	(0.7)	(2.1)	(2.1)
Amortization of actuarial net loss	0.0	0.2	0.0	0.6
Pension settlement charge	0.0	0.0	0.0	0.0
Net periodic benefit costs	$ (0.5)	$ (0.2)	$ (1.3)	$ (0.6)