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Derivatives and Risk Management Activities - Net Unrealized Gain/(Loss) Recognized in AOCI (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024	Dec. 31, 2023
Derivative assets and liabilities
Deferred losses on hedges remaining in other comprehensive income	$ 14,060	$ 14,878	$ 14,316	$ 14,972
Derivative Instruments
Derivative assets and liabilities
Deferred losses on hedges remaining in other comprehensive income	(44)	(66)	(44)	$ (81)
Interest rate derivatives, net	(1)	13
Net gain (loss) deferred in AOCI	(44)
Other current assets
Derivative assets and liabilities
Net fair value of interest rate hedges	1
Other long-term assets, net
Derivative assets and liabilities
Net fair value of interest rate hedges	24		$ 27
Interest rate derivatives
Derivative assets and liabilities
Interest rate derivatives, net	$ (1)	$ 13