Hedging Activities and Fair Value Measurements, Asset Balance Sheet Offsetting (Details) - Commodity Derivatives [Member] - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	$ 382	$ 450
Gross Amounts Offset in the Balance Sheet	0	0
Amounts of Assets Presented in the Balance Sheet	382	450
Financial Instruments	(381)	(450)
Cash Collateral Received	0	0
Cash Collateral Paid	0	0
Amounts That Would Have Been Presented On Net Basis	$ 1	$ 0