Schedule I - Condensed Financial Information of Parent (Notes) (Details) $ / shares in Units, $ in Millions	1 Months Ended		3 Months Ended		12 Months Ended
	Dec. 31, 2023 USD ($) $ / shares shares	Nov. 30, 2023 USD ($) $ / shares shares	Jun. 30, 2024 $ / shares shares	Mar. 31, 2024 $ / shares shares	Dec. 31, 2024 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($)	Dec. 31, 2018 USD ($)	May 31, 2024 USD ($)
Debt and Credit Agreements
Commitment					$ 4,850
Outstanding borrowings					1,705
Amount available					3,139
Equity
Gain on shares acquired					$ 1	$ 16
Redemption amount (in dollars per share) | $ / shares					$ 1,000
Redemption amount following change in criteria (in dollars per share) | $ / shares					$ 1,020
Related Party Transactions
Other current liabilities	$ 1,538				$ 1,439	1,538
Other deferred credits and other long-term liabilities	3,258				$ 3,566	3,258
SCE
Basis of Presentation
Weighted-average equity component authorization (as a percent)					52.00%			45.20%
Weighted-average common equity component authorization period								37 months
Wildfire related charge incurred after tax								$ 1,800
Spot rate equity ratio								47.70%
Waiver threshold percent								47.70%
Weighted-average common equity component of total capitalization percent								48.70%
Debt and Credit Agreements
Covenant debt to total capitalization ratio					0.65
Actual debt to capitalization ratio					0.58
Related Party Transactions
Other current liabilities	1,535				$ 1,495	1,535
Other deferred credits and other long-term liabilities	$ 3,206				3,518	3,206
Multi-year credit facilities | SCE
Debt and Credit Agreements
Commitment					3,350
Outstanding borrowings					1,260
Amount available					$ 2,084
Contingent maximum available borrowing									$ 4,000
Preferred Stock
Equity
Liquidation value (in dollars per share) | $ / shares					$ 1,000
Series A Preferred Stock
Equity
Average price shares acquired (in dollars per share) | $ / shares	$ 971	$ 925
Preferred stock, shares outstanding (in shares) | shares					1,159,317
Preferred stock, dividend rate, (as a percent)					5.375%
Common stock repurchased | shares	29,186	61,497
Preferred stock current redemption amount	$ 28	$ 57				$ 28
Series B Preferred Stock
Equity
Average price shares acquired (in dollars per share) | $ / shares	$ 955	$ 904	$ 967	$ 952
Preferred stock, shares outstanding (in shares) | shares	532,454				503,454	532,454
Preferred stock, dividend rate, (as a percent)					5.00%
Common stock repurchased | shares	133,323	84,223	9,000	20,000
Preferred stock current redemption amount	$ 127	$ 76				$ 127
At-the-market Program (ATM)
Equity
Aggregate sale price					$ 500
Parent Company
Basis of Presentation
Cash dividends received from consolidated subsidiaries					(1,400)	1,400	$ 1,300
Related Party Transactions
Other current liabilities	598				639	598
Other deferred credits and other long-term liabilities	362				350	362
Parent Company | Related Party
Related Party Transactions
Expenses from services provided by SCE					2	2	2
Interest expense from loans due to affiliates					2	2	$ 3
Prepaid insurance	400				571	400
Other current liabilities	185				186	185
Other deferred credits and other long-term liabilities	$ 112				98	$ 112
Parent Company | 4.95% Senior Notes Due 2025
Debt and Credit Agreements
Long-term debt					$ 400
Interest rate on debt (as a percent)					4.95%
Parent Company | 4.70% Senior notes due 2025
Debt and Credit Agreements
Long-term debt					$ 400
Interest rate on debt (as a percent)					4.70%
Parent Company | 5.75% Senior Notes Due 2027
Debt and Credit Agreements
Long-term debt					$ 600
Interest rate on debt (as a percent)					5.75%
Parent Company | 4.125% Senior Notes Due 2028
Debt and Credit Agreements
Long-term debt					$ 550
Interest rate on debt (as a percent)					4.125%
Parent Company | 5.25% Senior Notes Due 2028
Debt and Credit Agreements
Long-term debt					$ 600
Interest rate on debt (as a percent)					5.25%
Parent Company | 6.95% senior notes due in 2029
Debt and Credit Agreements
Long-term debt					$ 550
Interest rate on debt (as a percent)					6.95%
Parent Company | 5.45% Senior note due 2029
Debt and Credit Agreements
Long-term debt					$ 500
Interest rate on debt (as a percent)					5.45%
Parent Company | 5.25% Senior Notes Due 2032
Debt and Credit Agreements
Long-term debt					$ 550
Interest rate on debt (as a percent)					5.25%
Parent Company | 8.125% Junior Subordinated Notes Due 2053
Debt and Credit Agreements
Long-term debt					$ 500
Interest rate on debt (as a percent)					8.125%
Parent Company | 7.875% junior subordinated notes due 2054
Debt and Credit Agreements
Long-term debt					$ 450
Interest rate on debt (as a percent)					7.875%