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Accounting for Derivative Instruments and Hedging Activities (Details) £ in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)	Mar. 31, 2025 GBP (£)	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Gain (Loss) On Financial Instruments, Net
Change in fair value of cross-currency derivative instruments	$ (13)	$ (20)
Foreign currency remeasurement of Sterling Notes to U.S. dollars	(52)	16
Loss on financial instruments, net	$ (65)	$ (4)
Cross Currency Derivatives
Derivatives:
Notional amount | £			£ 1,275
Level 2 | Cross Currency Derivatives
Derivatives:
Derivative Liability				$ 517	$ 504

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