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, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Current year actuarial loss	$ 19.9	$ 39.8
Prior year service cost occurring during the year	0.1	4.2
Amortization of actuarial loss	(5.1)	(3.3)
Amortization of prior service cost	(0.2)	0.0
Other adjustments	0.0	(0.2)
Settlement	(0.4)	(4.3)
Total recognized in other comprehensive loss	14.3	36.2
U.S.
Defined Benefit Plan Disclosure [Line Items]
Current year actuarial loss	3.0	8.6
Prior year service cost occurring during the year	0.1	0.0
Amortization of actuarial loss	(1.4)	(0.9)
Amortization of prior service cost	0.0	0.0
Other adjustments	0.0	(0.1)
Settlement	0.0	(1.6)
Total recognized in other comprehensive loss	1.7	6.0
International
Defined Benefit Plan Disclosure [Line Items]
Current year actuarial loss	16.9	31.2
Prior year service cost occurring during the year	0.0	4.2
Amortization of actuarial loss	(3.7)	(2.4)
Amortization of prior service cost	(0.2)	0.0
Other adjustments	0.0	(0.1)
Settlement	(0.4)	(2.7)
Total recognized in other comprehensive loss	$ 12.6	$ 30.2