Revenue - Summary of SCE (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Revenue
Total operating revenue	$ 3,811	$ 4,078
SCE
Revenue
Total revenue from contracts with customer	3,769	3,770
Alternative revenue program and other	33	294
Total operating revenue	3,802	4,064
Receivables from contracts with customers	2,600		$ 2,900
Accrued unbilled revenues	804		$ 845
SCE \| Commercial
Revenue
Total revenue from contracts with customer	1,548	1,479
SCE \| Residential
Revenue
Total revenue from contracts with customer	1,579	1,562
SCE \| Other
Revenue
Total revenue from contracts with customer	$ 642	$ 729

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