Summary of Significant Accounting Policies (Dividends) (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	Feb. 22, 2024	Dec. 31, 2023	Dec. 31, 2019	Dec. 31, 2018	Nov. 30, 2023
Significant Accounting Policies [Line Items]
Dividend increase (decrease) (as a percent)		5.80%
Dividends (in dollars per share)	$ 0.78	$ 3.12			$ 2.95
Minimum
Significant Accounting Policies [Line Items]
Dividend target payout ratio		45.00%
Maximum
Significant Accounting Policies [Line Items]
Dividend target payout ratio		55.00%
SCE
Significant Accounting Policies [Line Items]
Weighted-average equity component authorization (as a percent)		52.00%	48.00%	45.20%
Wildfire related charge incurred after tax				$ 1,800
Weighted-average common equity component authorization period				37 months
Weighted-average common equity component of total capitalization percent (below)				48.70%
Spot rate equity ratio				47.70%
Waiver threshold percent				47.70%
Dividends	$ 360
SCE | Minimum
Significant Accounting Policies [Line Items]
Weighted-average equity component authorization (as a percent)				48.00%