Variable Interest Entities (Recovery Funding) (Details) - USD ($) $ in Millions	Jul. 12, 2019	Jun. 30, 2022	Mar. 31, 2022	Feb. 28, 2022	Dec. 31, 2021	Feb. 28, 2021
Variable Interest Entity [Line Items]
Other current assets		$ 166			$ 249
Regulatory assets: Non-current		7,854			7,660
Regulatory liabilities: Current		(523)			(603)
Current portion of long-term debt		(2,175)			(1,077)
Other current liabilities		(1,641)			(1,667)
Long-term debt		(25,143)			(24,170)
SCE Recovery Funding LLC
Variable Interest Entity [Line Items]
Other current assets		23			19
Regulatory assets: Non-current		845			325
Regulatory liabilities: Current		(8)			(14)
Current portion of long-term debt		(32)			(14)
Other current liabilities		(1)			(1)
Long-term debt		(823)			(314)
SCE
Variable Interest Entity [Line Items]
Capital expenditures excluded	$ 1,600
Other current assets		156			222
Regulatory assets: Non-current		7,854			7,660
Regulatory liabilities: Current		(523)			(603)
Current portion of long-term debt		(1,075)			(377)
Other current liabilities		(1,633)			(1,631)
Long-term debt		(23,103)			(21,733)
SCE | Series 2022-A senior secured recovery bonds
Variable Interest Entity [Line Items]
Debt			$ 533	$ 533
SCE | Series 2021-A senior secured recovery bonds
Variable Interest Entity [Line Items]
Debt						$ 338
SCE | SCE Recovery Funding LLC
Variable Interest Entity [Line Items]
Regulatory assets: Non-current		845			325
Long-term debt		$ (823)			$ (314)