Financial Instruments and Fair Value Measurements - Summary of Derivative Financial Instruments (Details) $ in Millions	Mar. 31, 2022 USD ($) derivative Rate	Dec. 31, 2021 USD ($)	Feb. 29, 2020 derivative
Derivative [Line Items]
Notional Amount	$ 2,444.1	$ 2,731.9
Fair Value - asset (liability)	44.0	(41.1)
Designated as hedging instrument | Cash flow hedge
Derivative [Line Items]
Notional Amount	1,082.7	1,092.4
Fair Value - asset (liability)	$ 21.3	(26.4)
Interest rate swap | Cash flow hedge
Derivative [Line Items]
Number of Instruments | derivative	1
Interest rate swap | Designated as hedging instrument | Cash flow hedge
Derivative [Line Items]
Number of Instruments | derivative	1
Notional Amount	$ 250.0	250.0
Weighted Average Strike Rate	3.04%
Fair Value - asset (liability)	$ (3.2)	(11.9)
Cross-currency swaps | Designated as hedging instrument | Cash flow hedge
Derivative [Line Items]
Number of Instruments | derivative	4
Notional Amount	$ 166.3	166.3
Fair Value - asset (liability)	$ (7.2)	(13.8)
GBP cross-currency swaps | Designated as hedging instrument | Cash flow hedge
Derivative [Line Items]
Number of Instruments | derivative	4
Notional Amount	$ 166.3
GBP cross-currency swaps | Designated as hedging instrument | Cash flow hedge | Minimum
Derivative [Line Items]
Fixed strike rate	4.82%
GBP cross-currency swaps | Designated as hedging instrument | Cash flow hedge | Maximum
Derivative [Line Items]
Fixed strike rate	10.96%
GBP cross-currency swaps | Designated as hedging instrument | Cash flow hedge | Weighted Average
Derivative [Line Items]
Weighted Average Strike Rate	9.78%
Foreign currency forwards | Designated as hedging instrument | Cash flow hedge
Derivative [Line Items]
Number of Instruments | derivative	29
Notional Amount	$ 166.4	176.1
Fair Value - asset (liability)	$ 10.3	7.6
Weighted average forward exchange rate | Rate	141.00%
Forward-starting swaps | Designated as hedging instrument | Cash flow hedge
Derivative [Line Items]
Number of Instruments | derivative	6
Forward-starting swap, derivative | Designated as hedging instrument | Cash flow hedge
Derivative [Line Items]
Number of Instruments | derivative	4
Notional Amount	$ 300.0	300.0
Weighted Average Strike Rate	1.86%
Fair Value - asset (liability)	$ 14.9	(3.2)
Forward-starting swaps, hybrid debt | Designated as hedging instrument | Cash flow hedge
Derivative [Line Items]
Number of Instruments | derivative	2
Notional Amount	$ 200.0	200.0
Weighted Average Strike Rate	1.93%
Fair Value - asset (liability)	$ 6.5	(5.1)
Currency exchange swaps | Not designated as hedging instrument
Derivative [Line Items]
Number of Instruments | derivative	4
Notional Amount	$ 1,361.4	1,639.5
Fair Value - asset (liability)	$ 22.7	$ (14.7)
GBP currency exchange swap | Not designated as hedging instrument
Derivative [Line Items]
Number of Instruments | derivative	2
Notional Amount	$ 1,090.0
Weighted average forward exchange rate | Rate	134.00%
EUR currency exchange swap | Not designated as hedging instrument
Derivative [Line Items]
Number of Instruments | derivative	2
Notional Amount	$ 268.3
Weighted average forward exchange rate | Rate	111.00%
Treasury rate locks | Designated as hedging instrument | Cash flow hedge
Derivative [Line Items]
Number of Instruments | derivative			5