Fair Value Measurements (Debt) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Fair Value of Long-Term Debt Recorded at Carrying Value
Carrying Value	$ 29,639	$ 25,247
Fair Value	26,824	27,718
SCE
Fair Value of Long-Term Debt Recorded at Carrying Value
Carrying Value	26,258	22,110
Fair Value	$ 23,469	$ 24,375

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

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