Employee Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 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	2.6	2.6
Expected return on plan assets	(1.1)	(1.5)	(2.2)	(3.0)
Amortization of prior service cost	0.0	0.0	0.0	0.0
Amortization of actuarial net loss	0.8	0.8	1.6	1.6
Net periodic benefit costs	1.0	0.6	2.0	1.2
Pension Plans | Non-U.S. Pension Plans
Components of periodic benefit costs
Service cost - benefits earned during the period	0.5	0.5	1.0	1.0
Interest cost of projected benefit obligations	0.5	0.5	1.0	1.0
Expected return on plan assets	(0.3)	(0.4)	(0.6)	(0.8)
Amortization of prior service cost	0.0	0.0	0.0	0.0
Amortization of actuarial net loss	0.3	0.4	0.6	0.8
Net periodic benefit costs	1.0	1.0	2.0	2.0
Postretirement Health and Other Plans
Components of periodic benefit costs
Service cost - benefits earned during the period	0.1	0.1	0.2	0.2
Interest cost of projected benefit obligations	0.2	0.2	0.4	0.4
Expected return on plan assets	0.0	0.0	0.0	0.0
Amortization of prior service cost	(0.7)	(0.7)	(1.4)	(1.4)
Amortization of actuarial net loss	0.0	0.2	0.0	0.4
Net periodic benefit costs	$ (0.4)	$ (0.2)	$ (0.8)	$ (0.4)