Profit Sharing, Retirement Savings Plans and Defined Benefit Pension Plans - Amounts Included in Consolidated Balance Sheets (Details) - Pension Plan - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Other non-current assets	$ 44.2	$ 26.3
Other current liabilities	(3.4)	(2.3)
Other non-current liabilities	(178.5)	(171.9)
Net amount recognized	(137.7)	(147.9)
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	(57.0)	(62.1)
Net amount recognized	(57.0)	(62.1)
International
Defined Benefit Plan Disclosure [Line Items]
Other non-current assets	44.2	26.3
Other current liabilities	(3.4)	(2.3)
Other non-current liabilities	(121.5)	(109.8)
Net amount recognized	$ (80.7)	$ (85.8)