Financial Risk Management Activities - Schedule of Derivative Transactions Designated and Effective as Cash Flow Hedges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	$ (6)	$ 18	$ 24	$ 32
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	1	(243)	(2)	(260)
Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion	4	3	11	3
Cash Flow Hedges [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	3	2	8	2	$ 3
Interest Rate Swap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	(6)	18	24	32
Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion	$ 4	$ 3	$ 11	$ 3