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Financial Instruments - Schedule of Effect of Risk Management (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Cash flow hedges: |  |  |  |
Total | $ 36.9 | $ 15.8 | $ 125.7 | $ (46.1)
Hedged Fixed Rate Debt |  |  |  |
Cash flow hedges: |  |  |  |
Effective portion of risk-management instruments that was recognized in other comprehensive income (loss) | 42.0 | 10.6 | 173.8 | (121.2)
Cross-currency interest rate swaps |  |  |  |
Cash flow hedges: |  |  |  |
Effective portion of risk-management instruments that was recognized in other comprehensive income (loss) | 2.3 | (7.8) | 19.3 | (19.6)
Effective portion of risk-management instruments that was recognized in other comprehensive income (loss) | 1.9 | 21.9 | 15.6 | 14.1
Foreign Exchange Contract |  |  |  |
Cash flow hedges: |  |  |  |
Effective portion of risk-management instruments that was recognized in other comprehensive income (loss) | 32.7 | 27.7 | 131.8 | (18.4)
Forward-starting interest rate swaps |  |  |  |
Cash flow hedges: |  |  |  |
Effective portion of risk-management instruments that was recognized in other comprehensive income (loss) | 0.0 | 33.3 | 77.4 | 57.1
Designated as Hedging Instrument | Hedged Fixed Rate Debt |  |  |  |
Fair value hedges: |  |  |  |
Effect from hedged fixed-rate debt | (2.3) | (34.4) | (19.0) | 0.9
Designated as Hedging Instrument | Interest Rate Contracts |  |  |  |
Fair value hedges: |  |  |  |
Effect from interest rate contracts | 2.3 | 34.4 | 19.0 | (0.9)
Cash flow hedges: |  |  |  |
Effective portion of losses on interest rate contracts reclassified from accumulated other comprehensive loss | 2.0 | 3.3 | 4.4 | 7.1
Designated as Hedging Instrument | Cross-currency interest rate swaps |  |  |  |
Cash flow hedges: |  |  |  |
Effective portion of losses on interest rate contracts reclassified from accumulated other comprehensive loss | 3.3 | (17.1) | 87.3 | (30.0)
Not Designated as Hedging Instrument | Foreign Exchange Contract |  |  |  |
Cash flow hedges: |  |  |  |
Net (gains) losses on foreign currency exchange contracts not designated as hedging instruments | $ 31.6 | $ 29.6 | $ 34.0 | $ (23.2)

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