Hedging Activities and Fair Value Measurements, Liability Balance Sheet Offsetting (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Interest rate derivatives [Member]
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	$ 31
Gross Amounts Offset in the Balance Sheet	0
Amounts of Liabilities Presented in the Balance Sheet	31
Financial Instruments	0
Cash Collateral Received	0
Cash Collateral Paid	0
Amounts That Would Have Been Presented On Net Basis	31
Commodity Derivatives [Member]
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	471	$ 412
Gross Amounts Offset in the Balance Sheet	0	0
Amounts of Liabilities Presented in the Balance Sheet	471	412
Financial Instruments	(450)	(411)
Cash Collateral Received	1	0
Cash Collateral Paid	(21)	0
Amounts That Would Have Been Presented On Net Basis	$ 1	$ 1