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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, 2023	Mar. 31, 2022	Dec. 31, 2022
Other current assets
Derivative assets and liabilities
Net fair value of interest rate hedges	$ 71		$ 75
Other long-term assets, net
Derivative assets and liabilities
Net fair value of interest rate hedges	44		$ 45
AOCI cash flow hedge
Derivative assets and liabilities
Net loss deferred in AOCI	110
Interest rate derivatives
Derivative assets and liabilities
Unrealized gain/(loss) on hedges	$ (5)	$ 32