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Financial Instruments (Schedule of Effect of Risk Management) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Cash flow hedges: |  |
Total | $ 88.8 | $ (61.9)
Hedged Fixed Rate Debt |  |
Cash flow hedges: |  |
Effective portion of risk-management instruments that was recognized in other comprehensive income (loss) | 131.8 | (131.8)
Cross-currency interest rate swaps |  |
Cash flow hedges: |  |
Effective portion of risk-management instruments that was recognized in other comprehensive income (loss) | 17.0 | (11.8)
Effective portion of risk-management instruments that was recognized in other comprehensive income (loss) | 13.7 | (7.8)
Foreign Exchange Contract |  |
Cash flow hedges: |  |
Effective portion of risk-management instruments that was recognized in other comprehensive income (loss) | 99.1 | (46.1)
Forward-starting interest rate swaps |  |
Cash flow hedges: |  |
Effective portion of risk-management instruments that was recognized in other comprehensive income (loss) | 77.4 | 23.8
Designated as Hedging Instrument | Hedged Fixed Rate Debt |  |
Fair value hedges: |  |
Effect from hedged fixed-rate debt | (16.7) | 35.3
Designated as Hedging Instrument | Interest Rate Contracts |  |
Fair value hedges: |  |
Effect from interest rate contracts | 16.7 | (35.3)
Cash flow hedges: |  |
Effective portion of losses on interest rate contracts reclassified from accumulated other comprehensive loss | 2.4 | 3.8
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 | 84.0 | (12.9)
Not Designated as Hedging Instrument | Foreign Exchange Contract |  |
Cash flow hedges: |  |
Net (gains) losses on foreign currency exchange contracts not designated as hedging instruments | $ 2.4 | $ (52.8)

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