Hedging Activities and Fair Value Measurements, Liability Balance Sheet Offsetting (Details) - Commodity Derivatives [Member] - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	$ 382	$ 412
Gross Amounts Offset in the Balance Sheet	0	0
Amounts of Liabilities Presented in the Balance Sheet	382	412
Financial Instruments	(373)	(411)
Cash Collateral Received	0	0
Cash Collateral Paid	(9)	0
Amounts That Would Have Been Presented On Net Basis	$ 0	$ 1