Hedging Activities and Fair Value Measurements, Asset Balance Sheet Offsetting (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Interest rate derivatives [Member]
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets		$ 26
Gross Amounts Offset in the Balance Sheet		0
Amounts of Assets Presented in the Balance Sheet		26
Financial Instruments		0
Cash Collateral Received		0
Cash Collateral Paid		0
Amounts That Would Have Been Presented On Net Basis		26
Commodity Derivatives [Member]
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	$ 450	486
Gross Amounts Offset in the Balance Sheet	0	0
Amounts of Assets Presented in the Balance Sheet	450	486
Financial Instruments	(450)	(411)
Cash Collateral Received	0	0
Cash Collateral Paid	0	(74)
Amounts That Would Have Been Presented On Net Basis	$ 0	$ 1