Components of Accumulated Other Comprehensive Loss, Net - EEGH - Reclassifications from AOCI (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Loss, Net [Line Items]
Interest expense		$ 2,118	$ 2,021	$ 1,912
Other, net		(17)	88	97
Income (loss) before income tax expense (benefit) and equity income (loss)		5,294	7,471	2,414
Income tax (benefit) expense		(1,132)	308	(598)
Net income		6,189	7,014	2,968
EEGH
Accumulated Other Comprehensive Loss, Net [Line Items]
Net income from discontinued operations	[1]	0	0	141
Interest expense		151	339	324
Other, net		1	42	43
Income (loss) before income tax expense (benefit) and equity income (loss)		725	207	759
Income tax (benefit) expense		117	(24)	101
Net income		652	273	842
EEGH | Cash flow hedge | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Loss, Net [Line Items]
Income (loss) before income tax expense (benefit) and equity income (loss)		27	132	7
Income tax (benefit) expense		(7)	(34)	(2)
Net income		20	98	5
EEGH | Cash flow hedge | Commodity derivatives | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Loss, Net [Line Items]
Net income from discontinued operations				(4)
EEGH | Cash flow hedge | Interest rate contracts | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Loss, Net [Line Items]
Interest expense		6	157	5
EEGH | Cash flow hedge | Foreign currency exchange rate derivatives | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Loss, Net [Line Items]
Other, net		$ 21	(25)	6
EEGH | Unrecognized Amounts on Retirement Benefits | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Loss, Net [Line Items]
Other, net			6	7
Income (loss) before income tax expense (benefit) and equity income (loss)			6	7
Income tax (benefit) expense			(2)	(2)
Net income			$ 4	$ 5

[1] Includes income tax expense of $33 million for the year ended December 31, 2019.