Income Taxes (NOL and Carryforwards) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Carryforwards
Loss carryforwards		$ 3,235
Credit carryforwards		554
Deferred tax expense		(177)	$ 43	$ (296)
Capistrano Wind
Carryforwards
Deferred tax expense		121	223
Increase (decrease) to previously recorded tax expense	$ (125)
Expire in 2022
Carryforwards
Loss carryforwards		10
Credit carryforwards		0
Expire between 2024 to 2027
Carryforwards
Loss carryforwards		26
Credit carryforwards		0
Expire between 2029 to 2043
Carryforwards
Loss carryforwards		1,670
Credit carryforwards		544
No expiration date
Carryforwards
Loss carryforwards		1,529
Credit carryforwards		10
SCE
Carryforwards
Loss carryforwards		2,351
Credit carryforwards		60
Deferred tax expense		(111)	$ 62	$ (263)
SCE | Expire in 2022
Carryforwards
Loss carryforwards		6
Credit carryforwards		0
SCE | Expire between 2024 to 2027
Carryforwards
Loss carryforwards		25
Credit carryforwards		0
SCE | Expire between 2029 to 2043
Carryforwards
Loss carryforwards		870
Credit carryforwards		60
SCE | No expiration date
Carryforwards
Loss carryforwards		1,450
Credit carryforwards		$ 0