Financial Instruments, Hedging Activities and Fair Value Measurements - Instruments Designated as Cash Flow Hedges in AOCI (Details) - Level 2 - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives used in hedging	$ 0.3	$ 98.1
Cash Flow Hedging | Interest rate caps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives used in hedging	0.0	2.6
Cash Flow Hedging | Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives used in hedging	26.3	60.0
Cash Flow Hedging | Foreign currency forward contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives used in hedging	0.0	0.3
Net Investment Hedging | Cross-currency swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives used in hedging	$ (26.0)	$ 35.2