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Accounting for Derivative Instruments and Hedging Activities (Details) £ in Millions, $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2024 USD ($) | Mar. 31, 2023 USD ($) | Mar. 31, 2024 GBP (£) | Mar. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
Gain (Loss) On Financial Instruments, Net |  |  |  |  |
Change in fair value of cross-currency derivative instruments | $ (20) | $ 5 |  |  |
Foreign currency remeasurement of Sterling Notes to U.S. dollars | 16 | (32) |  |  |
Gain (loss) on financial instruments, net | $ (4) | $ (27) |  |  |
Cross Currency Derivatives |  |  |  |  |
Derivatives: |  |  |  |  |
Notional amount | £ |  |  | £ 1,275 |  |
Level 2 | Cross Currency Derivatives |  |  |  |  |
Derivatives: |  |  |  |  |
Derivative Liability |  |  |  | $ 460 | $ 440

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