Profit Sharing, Retirement Savings Plans and Defined Benefit Pension Plans - Amounts Included in Consolidated Balance Sheets (Details) - Pension Plan - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Other non-current assets	$ 54.3	$ 44.2
Other current liabilities	(4.0)	(3.4)
Other non-current liabilities	(201.0)	(178.5)
Net amount recognized	(150.7)	(137.7)
U.S.
Defined Benefit Plan Disclosure [Line Items]
Other non-current assets	0.0	0.0
Other current liabilities	0.0	0.0
Other non-current liabilities	(60.6)	(57.0)
Net amount recognized	(60.6)	(57.0)
International
Defined Benefit Plan Disclosure [Line Items]
Other non-current assets	54.3	44.2
Other current liabilities	(4.0)	(3.4)
Other non-current liabilities	(140.4)	(121.5)
Net amount recognized	$ (90.1)	$ (80.7)