Components of Accumulated Other Comprehensive Loss, Net - EEGH (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 50,589	$ 46,977	$ 32,578
Other comprehensive income (loss)	(806)	217	154
Ending balance	50,639	50,589	46,977
Accumulated Other Comprehensive Income (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(1,340)	(1,552)	(1,706)
Other comprehensive income (loss)	(809)	212	154
Ending balance	(2,149)	(1,340)	(1,552)
Unrecognized Amounts on Retirement Benefits
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(318)	(492)	(417)
Other comprehensive income (loss)	(72)	174	(65)
Ending balance	(390)	(318)	(492)
Unrealized Gains (Losses) on Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	59	(8)	7
Other comprehensive income (loss)	76	67	(15)
Ending balance	135	59	(8)
Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(5)	(10)	0
Ending balance	(2)	(5)	(10)
Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	3,895	3,967	129
Other comprehensive income (loss)	3	5	0
Ending balance	3,807	3,895	3,967
EEGH
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	7,494	6,995	10,229
Other comprehensive income (loss)	4	15	124
Ending balance	7,888	7,494	6,995
EEGH | Accumulated Other Comprehensive Income (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(43)	(53)	(187)
Other comprehensive income (loss)	1	10	134
Ending balance	(42)	(43)	(53)
EEGH | Unrecognized Amounts on Retirement Benefits
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(6)	(12)	(106)
Other comprehensive income (loss)	5	6	94
Ending balance	(1)	(6)	(12)
EEGH | Unrealized Gains (Losses) on Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(42)	(51)	(81)
Other comprehensive income (loss)	(1)	9	30
Ending balance	(43)	(42)	(51)
EEGH | Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(5)	(10)	0
Other comprehensive income (loss)			(10)
Ending balance	(2)	(5)	(10)
EEGH | Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	4,036	4,091	1,385
Other comprehensive income (loss)	3	5	(10)
Ending balance	$ 3,947	$ 4,036	$ 4,091