Schedule I - Condensed Financial Information of Parent (Notes) (Details) $ / shares in Units, $ in Millions	1 Months Ended			12 Months Ended
	Dec. 31, 2023 USD ($) $ / shares shares	Nov. 30, 2023 USD ($) shares	Oct. 31, 2023 $ / shares	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($)	Dec. 31, 2019	Dec. 31, 2018 USD ($)	May 31, 2023 USD ($)
Debt and Credit Agreements
Commitment	$ 4,850.0			$ 4,850.0
Outstanding borrowings	1,804.0			1,804.0
Amount available	3,017.0			$ 3,017.0
Equity
Gain on shares acquired	$ 16.0
Redemption amount (in dollars per share) | $ / shares	$ 1,000			$ 1,000
Redemption amount following change in criteria (in dollars per share) | $ / shares	$ 1,020			$ 1,020
Related Party Transactions
Interest expense from loans due to affiliates				$ 1,612.0	$ 1,169.0	$ 925.0
Other current liabilities	$ 1,751.0			1,751.0	1,601.0
Other deferred credits and other long-term liabilities	$ 3,258.0			$ 3,258.0	$ 2,988.0
SCE
Basis of Presentation
Weighted-average equity component authorization (as a percent)				52.00%			48.00%	45.20%
Weighted-average common equity component authorization period								37 months
Wildfire related charge incurred after tax								$ 1,800.0
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			0.65
Actual debt to capitalization ratio	0.56			0.56
Equity
Shares repurchased | shares				0	0
Related Party Transactions
Interest expense from loans due to affiliates				$ 1,356.0	$ 1,005.0	791.0
Other current liabilities	$ 1,713.0			1,713.0	1,578.0
Other deferred credits and other long-term liabilities	3,206.0			3,206.0	$ 2,919.0
Multi-year credit facilities | SCE
Debt and Credit Agreements
Commitment	3,350.0			3,350.0
Outstanding borrowings	1,558.0			1,558.0
Amount available	1,763.0			1,763.0
Contingent maximum available borrowing	$ 4,000.0			$ 4,000.0
Multi-year credit facilities | SOFR | SCE
Debt and Credit Agreements
Variable rate on debt (as a percent)				1.08%
Preferred stock
Equity
Liquidation value (in dollars per share) | $ / shares	$ 1,000			$ 1,000
Preferred stock | SCE
Equity
Preferred stock, shares outstanding | shares	0			0	0
Series A
Equity
Preferred stock, dividend rate, (as a percent)				5.375%
Shares repurchased | shares	29,186	61,497
Preferred stock current redemption amount	$ 28.0	$ 57.0		$ 28.0
Preferred stock, shares outstanding | shares	1,159,317			1,159,317	1,250,000
Series B
Equity
Preferred stock, dividend rate, (as a percent)				5.00%
Shares repurchased | shares	133,323	84,223
Preferred stock current redemption amount	$ 127.0	$ 76.0		$ 127.0
Preferred stock, shares outstanding | shares	532,454			532,454	750,000
At-the-market Program (ATM)
Equity
Aggregate sale price	$ 500.0			$ 500.0
Stock compensation awards
Equity
Stock issued (in shares) | shares				1,151,964	1,253,049
Proceeds received, net of offering costs				$ 58.0	$ 57.0
In lieu of dividend payment
Equity
Stock issued (in shares) | shares				259,109	273,642
Proceeds received, net of offering costs				$ 18.0	$ 18.0
401(K)
Equity
Stock issued (in shares) | shares				144,200	157,000
Proceeds received, net of offering costs				$ 10.0	$ 10.0
Voluntary Cash Purchase
Equity
Stock issued (in shares) | shares				105,218	109,750
Proceeds received, net of offering costs				$ 7.0	$ 7.0
Employee Stock Purchase Plan
Equity
Stock issued (in shares) | shares				55,923	36,912
Proceeds received, net of offering costs				$ 4.0	$ 2.0
Edison International
Basis of Presentation
Cash dividends received from consolidated subsidiaries				$ 1,400.0	1,300.0	975.0
Debt and Credit Agreements
Covenant debt to total capitalization ratio	0.70			0.70
Actual debt to capitalization ratio	0.63			0.63
Equity
Gain on shares acquired	$ 16.0
Redemption amount (in dollars per share) | $ / shares	$ 1,000			$ 1,000
Redemption amount following change in criteria (in dollars per share) | $ / shares	$ 1,020			$ 1,020
Related Party Transactions
Other current liabilities	$ 598.0			$ 598.0	575.0
Other deferred credits and other long-term liabilities	362.0			362.0	394.0
Edison International | Related Party
Related Party Transactions
Expenses from services provided by SCE				2.0	2.0	2.0
Interest expense from loans due to affiliates				2.0	3.0	$ 5.0
Prepaid insurance	400.0			400.0	389.0
Other current liabilities	185.0			185.0	166.0
Long-term insurance receivables from affiliates					8.0
Other deferred credits and other long-term liabilities	112.0			112.0	$ 130.0
Edison International | 3.55% Senior note due 2024
Debt and Credit Agreements
Long-term debt	$ 500.0			$ 500.0
Interest rate on debt (as a percent)	3.55%			3.55%
Edison International | 4.95% Senior notes due 2025
Debt and Credit Agreements
Long-term debt	$ 400.0			$ 400.0
Interest rate on debt (as a percent)	4.95%			4.95%
Edison International | 4.70% Senior notes due 2025
Debt and Credit Agreements
Long-term debt	$ 400.0			$ 400.0
Interest rate on debt (as a percent)	4.70%			4.70%
Edison International | 5.75% Senior notes due 2027
Debt and Credit Agreements
Long-term debt	$ 600.0			$ 600.0
Interest rate on debt (as a percent)	5.75%			5.75%
Edison International | 4.125% Senior notes due 2028
Debt and Credit Agreements
Long-term debt	$ 550.0			$ 550.0
Interest rate on debt (as a percent)	4.125%			4.125%
Edison International | 5.25% Senior Notes due 2028
Debt and Credit Agreements
Long-term debt	$ 600.0			$ 600.0
Interest rate on debt (as a percent)	5.25%			5.25%
Edison International | 6.95% senior notes due in 2029
Debt and Credit Agreements
Long-term debt	$ 550.0			$ 550.0
Interest rate on debt (as a percent)	6.95%			6.95%
Edison International | 8.125% Junior subordinated notes due 2053
Debt and Credit Agreements
Long-term debt	$ 500.0			$ 500.0
Interest rate on debt (as a percent)	8.125%			8.125%
Edison International | 7.875% junior subordinated notes due 2054
Debt and Credit Agreements
Long-term debt	$ 450.0			$ 450.0
Interest rate on debt (as a percent)	7.875%			7.875%
Edison International | Multi-year credit facilities
Debt and Credit Agreements
Commitment	$ 1,500.0			$ 1,500.0
Outstanding borrowings	246.0			246.0
Amount available	$ 1,254.0			$ 1,254.0
Contingent maximum available borrowing									$ 2,000.0
Edison International | Preferred stock
Equity
Liquidation value (in dollars per share) | $ / shares	$ 1,000			$ 1,000
Edison International | Series A
Equity
Preferred stock, dividend rate, (as a percent)			5.375%
Redemption price (in dollars per share) | $ / shares	$ 971		$ 925	$ 971
Shares repurchased | shares	29,186	61,497
Preferred stock current redemption amount	$ 28.0	$ 57.0		$ 28.0
Preferred stock, shares outstanding | shares	1,159,317			1,159,317
Edison International | Series B
Equity
Preferred stock, dividend rate, (as a percent)			5.00%
Redemption price (in dollars per share) | $ / shares	$ 955		$ 904	$ 955
Shares repurchased | shares	133,323	84,223
Preferred stock current redemption amount	$ 127.0	$ 76.0		$ 127.0
Preferred stock, shares outstanding | shares	532,454			532,454
Edison International | At-the-market Program (ATM)
Equity
Aggregate sale price	$ 500.0			$ 500.0
Edison International | Stock compensation awards
Equity
Stock issued (in shares) | shares				1,151,964	1,253,049
Proceeds received, net of offering costs				$ 58.0	$ 57.0
Edison International | In lieu of dividend payment
Equity
Stock issued (in shares) | shares				259,109	273,642
Proceeds received, net of offering costs				$ 18.0	$ 18.0
Edison International | 401(K)
Equity
Stock issued (in shares) | shares				144,200	157,000
Proceeds received, net of offering costs				$ 10.0	$ 10.0
Edison International | Voluntary Cash Purchase
Equity
Stock issued (in shares) | shares				105,218	109,750
Proceeds received, net of offering costs				$ 7.0	$ 7.0
Edison International | Employee Stock Purchase Plan
Equity
Stock issued (in shares) | shares				55,923	36,912
Proceeds received, net of offering costs				$ 4.0	$ 2.0