Benefit Plans - Summary (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Pension Benefits | United States
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 1.8	$ 0.0	$ 4.1	$ 0.0
Interest cost	2.8	0.5	6.8	1.6
Expected return on plan assets	(4.0)	(0.5)	(9.5)	(1.6)
Recognition of:
Unrecognized prior service cost	0.0	0.0	0.0	0.0
Unrecognized net actuarial loss	0.0	0.0	0.0	0.1
Total recognized in other comprehensive (loss) income	0.6	0.0	1.4	0.1
Pension Benefits | Foreign Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	1.2	0.4	3.1	1.2
Interest cost	1.6	1.9	4.6	5.7
Expected return on plan assets	(2.8)	(2.5)	(8.2)	(7.7)
Recognition of:
Unrecognized prior service cost	0.0	0.0	0.1	0.1
Unrecognized net actuarial loss	0.8	0.5	2.2	1.5
Total recognized in other comprehensive (loss) income	0.8	0.3	1.8	0.8
Other Postretirement Benefits
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	0.0	0.0	0.0	0.0
Interest cost	0.2	0.0	0.5	0.1
Expected return on plan assets	0.0	0.0	0.0	0.0
Recognition of:
Unrecognized prior service cost	0.0	0.0	0.0	0.0
Unrecognized net actuarial loss	0.0	0.0	0.0	0.0
Total recognized in other comprehensive (loss) income	$ 0.2	$ 0.0	$ 0.5	$ 0.1