Profit Sharing, Retirement Savings Plans and Defined Benefit Pension Plans - Components of Net Periodic Benefit Costs (Income) (Details) - Pension Plan - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 4.6	$ 3.9	$ 4.3
Interest cost	16.5	21.9	21.7
Expected return on plan assets	(28.4)	(32.0)	(37.9)
Other adjustments	0.0	0.0	0.1
Amortization of net prior service cost	0.2	0.2	0.0
Amortization of net actuarial loss	6.1	5.1	3.3
Net periodic benefit (income) cost	(1.0)	(0.9)	(8.5)
Cost of settlement	1.8	0.4	4.4
Total benefit cost (income)	0.8	(0.5)	(4.1)
U.S.
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.1	0.1	0.1
Interest cost	5.3	6.9	6.5
Expected return on plan assets	(9.0)	(7.3)	(8.7)
Other adjustments	0.0	0.0	0.1
Amortization of net prior service cost	0.0	0.0	0.0
Amortization of net actuarial loss	1.5	1.4	0.9
Net periodic benefit (income) cost	(2.1)	1.1	(1.1)
Cost of settlement	0.0	0.0	1.6
Total benefit cost (income)	(2.1)	1.1	0.5
International
Defined Benefit Plan Disclosure [Line Items]
Service cost	4.5	3.8	4.2
Interest cost	11.2	15.0	15.2
Expected return on plan assets	(19.4)	(24.7)	(29.2)
Other adjustments	0.0	0.0	0.0
Amortization of net prior service cost	0.2	0.2	0.0
Amortization of net actuarial loss	4.6	3.7	2.4
Net periodic benefit (income) cost	1.1	(2.0)	(7.4)
Cost of settlement	1.8	0.4	2.8
Total benefit cost (income)	$ 2.9	$ (1.6)	$ (4.6)