Financial Instruments - Fair Values of Derivative Instruments in Consolidated Balance Sheet (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Asset derivatives	$ 73.5	$ 69.2
Liability derivatives	17.9	17.4
Derivatives designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Asset derivatives	73.1	65.7
Liability derivatives	16.3	17.1
Derivatives designated as hedging instruments: | Other current assets | Interest rate swaps
Derivatives, Fair Value [Line Items]
Asset derivatives	73.1	65.7
Derivatives designated as hedging instruments: | Other current assets | Cross-currency swaps
Derivatives, Fair Value [Line Items]
Asset derivatives	0.0	0.0
Derivatives designated as hedging instruments: | Other accrued & current liabilities | Interest rate swaps
Derivatives, Fair Value [Line Items]
Liability derivatives	0.0	0.0
Derivatives designated as hedging instruments: | Other accrued & current liabilities | Cross-currency swaps
Derivatives, Fair Value [Line Items]
Liability derivatives	16.3	17.1
Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Asset derivatives	0.4	3.5
Liability derivatives	1.6	0.3
Derivatives not designated as hedging instruments: | Other current assets | Foreign exchange forward contracts
Derivatives, Fair Value [Line Items]
Asset derivatives	0.4	3.5
Derivatives not designated as hedging instruments: | Other accrued & current liabilities | Foreign exchange forward contracts
Derivatives, Fair Value [Line Items]
Liability derivatives	$ 1.6	$ 0.3