Derivatives and Risk Management Activities - Offsetting Asset and Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Derivative Asset Positions
Effect of Collateral Netting	$ 373	$ 259
Commodity Derivatives
Derivative Asset Positions
Effect of Collateral Netting	373	259
Derivative Liability Positions
Gross Position - Asset	261	100
Gross Position - Liability	(410)	(243)
Net Carrying Value Presented on the Balance Sheet, Total	224	116
Other current assets | Commodity Derivatives
Derivative Asset Positions
Gross Position - Asset	230	90
Gross Position - Liability	(331)	(210)
Effect of Collateral Netting	373	259
Net Carrying Value Presented on the Balance Sheet	272	139
Other long-term assets, net | Commodity Derivatives
Derivative Asset Positions
Gross Position - Asset	12	3
Net Carrying Value Presented on the Balance Sheet	12	3
Other current liabilities | Commodity Derivatives
Derivative Liability Positions
Gross Position - Asset	11	4
Gross Position - Liability	(51)	(24)
Net Carrying Value Presented on the Balance Sheet	(40)	(20)
Other long-term liabilities and deferred credits | Commodity Derivatives
Derivative Liability Positions
Gross Position - Asset	8	3
Gross Position - Liability	(28)	(9)
Net Carrying Value Presented on the Balance Sheet	$ (20)	$ (6)