Fair Value Measurements (Debt) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Fair Value of Long-Term Debt Recorded at Carrying Value
Carrying Value	$ 31,656	$ 29,639
Fair Value	29,616	26,824
SCE
Fair Value of Long-Term Debt Recorded at Carrying Value
Carrying Value	28,180	26,258
Fair Value	$ 26,104	$ 23,469

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant