Fair Value Measurements (Debt) (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Fair Value of Long-Term Debt Recorded at Carrying Value
Carrying Value	$ 34,797	$ 33,013
Fair Value	32,091	31,315
SCE
Fair Value of Long-Term Debt Recorded at Carrying Value
Carrying Value	29,777	28,494
Fair Value	$ 27,013	$ 26,712