Components of Accumulated Other Comprehensive Loss, Net - EEGH (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	$ 51,651	$ 50,424	$ 50,639	$ 50,589
Other comprehensive income (loss)	264	(430)	304	(448)
Balance	52,960	51,191	52,960	51,191
EEGH
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	8,005	7,590	7,888	7,494
Other comprehensive income (loss)	7	(1)	4	4
Balance	8,044	7,717	8,044	7,717
Accumulated Other Comprehensive (Loss) Income, Net
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	(2,109)	(1,358)	(2,149)	(1,340)
Other comprehensive income (loss)	264	(430)	304	(448)
Balance	(1,845)	(1,788)	(1,845)	(1,788)
Accumulated Other Comprehensive (Loss) Income, Net | EEGH
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	(45)	(38)	(42)	(43)
Other comprehensive income (loss)	7	(1)	4	4
Balance	(38)	(39)	(38)	(39)
Unrecognized Amounts on Retirement Benefits
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance			(390)	(318)
Other comprehensive income (loss)			(11)	40
Balance	(401)	(278)	(401)	(278)
Unrecognized Amounts on Retirement Benefits | EEGH
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance			(1)	(6)
Other comprehensive income (loss)			(1)	1
Balance	(2)	(5)	(2)	(5)
Unrealized Losses on Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance			135	59
Other comprehensive income (loss)			(16)	103
Balance	119	162	119	162
Unrealized Losses on Cash Flow Hedges | EEGH
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance			(43)	(42)
Other comprehensive income (loss)			5	3
Balance	(38)	(39)	(38)	(39)
Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance			(2)	(5)
Other comprehensive income (loss)			0	0
Balance	(2)	(5)	(2)	(5)
Noncontrolling Interest | EEGH
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance			(2)	(5)
Other comprehensive income (loss)			0	0
Balance	$ (2)	$ (5)	$ (2)	$ (5)