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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

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