Financial Instruments - Fair Values of Derivative Instruments in Consolidated Balance Sheet (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Asset derivatives	$ 43.1	$ 12.0
Liability derivatives	1.0	0.7
Derivatives designated as hedging instruments
Derivatives, Fair Value [Line Items]
Asset derivatives	42.4	10.1
Liability derivatives	0.0	0.0
Derivatives designated as hedging instruments | Interest rate swap asset | Interest rate contracts
Derivatives, Fair Value [Line Items]
Asset derivatives	42.4	10.1
Derivatives designated as hedging instruments | Other accrued & current liabilities | Interest rate contracts
Derivatives, Fair Value [Line Items]
Liability derivatives	0.0	0.0
Derivatives not designated as hedging instruments
Derivatives, Fair Value [Line Items]
Asset derivatives	0.7	1.9
Liability derivatives	1.0	0.7
Derivatives not designated as hedging instruments | Other accrued & current liabilities | Foreign exchange forward contracts
Derivatives, Fair Value [Line Items]
Liability derivatives	1.0	0.7
Derivatives not designated as hedging instruments | Other current assets | Foreign exchange forward contracts
Derivatives, Fair Value [Line Items]
Asset derivatives	$ 0.7	$ 1.9