Profit Sharing, Retirement Savings Plans and Defined Benefit Pension Plans - Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Loss (Income) (Details) - Pension Plan - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Current year actuarial loss	$ 40.0	$ 19.9
Prior year service cost occurring during the year	0.8	0.1
Amortization of actuarial loss	(6.1)	(5.1)
Amortization of prior service cost	(0.2)	(0.2)
Settlement	(1.8)	(0.4)
Total recognized in other comprehensive loss	32.7	14.3
U.S.
Defined Benefit Plan Disclosure [Line Items]
Current year actuarial loss	18.6	3.0
Prior year service cost occurring during the year	0.0	0.1
Amortization of actuarial loss	(1.5)	(1.4)
Amortization of prior service cost	0.0	0.0
Settlement	0.0	0.0
Total recognized in other comprehensive loss	17.1	1.7
International
Defined Benefit Plan Disclosure [Line Items]
Current year actuarial loss	21.4	16.9
Prior year service cost occurring during the year	0.8	0.0
Amortization of actuarial loss	(4.6)	(3.7)
Amortization of prior service cost	(0.2)	(0.2)
Settlement	(1.8)	(0.4)
Total recognized in other comprehensive loss	$ 15.6	$ 12.6