Schedule I - Condensed Financial Information of Parent (Notes) (Details) $ / shares in Units, $ in Millions	1 Months Ended		3 Months Ended	12 Months Ended
	Nov. 30, 2022 USD ($)	Apr. 30, 2022 USD ($)	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($)	Dec. 31, 2019	Dec. 31, 2018 USD ($)	Sep. 30, 2022 USD ($)	May 31, 2022 USD ($)
Debt and Credit Agreements
Commitment			$ 4,850	$ 4,850
Outstanding borrowings			285	285
Amount available			$ 4,134	$ 4,134
Equity
Equity contribution					$ 900
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	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	0.65
Actual debt to capitalization ratio			0.56	0.56
Related Party Transactions
Long-term receivables due from affiliate			$ 334	$ 334
Multi-year credit facilities | SCE
Debt and Credit Agreements
Commitment			3,350	3,350
Outstanding borrowings			195	195
Amount available			2,724	2,724
Contingent maximum available borrowing			4,000	$ 4,000
Multi-year credit facilities | SOFR | SCE
Debt and Credit Agreements
Basis points				1.08%
0.55% term loan due 2023 | SCE
Debt and Credit Agreements
Outstanding borrowings			$ 730	$ 730
0.55% term loan due 2023 | SOFR | SCE
Debt and Credit Agreements
Basis points				0.55%
Series A
Debt and Credit Agreements
Stock issued (in shares) | shares					1,250,000
Equity
Stock issued (in shares) | shares					1,250,000
Preferred stock, dividend rate, (as a percent)					5.375%
Margin rate for dividend rate reset (as a percent)					4.698%
Series B
Debt and Credit Agreements
Stock issued (in shares) | shares					750,000
Equity
Stock issued (in shares) | shares					750,000
Preferred stock, dividend rate, (as a percent)					5.00%
Margin rate for dividend rate reset (as a percent)					3.901%
At-the-market Program (ATM)
Debt and Credit Agreements
Stock issued (in shares) | shares				0
Equity
Aggregate sale price									$ 500
Stock issued (in shares) | shares				0
Stock compensation awards
Debt and Credit Agreements
Stock issued (in shares) | shares				1,253,049	629,092
Equity
Stock issued (in shares) | shares				1,253,049	629,092
Proceeds received, net of offering costs				$ 57	$ 25
In lieu of dividend payment
Debt and Credit Agreements
Stock issued (in shares) | shares				273,642	293,031
Equity
Stock issued (in shares) | shares				273,642	293,031
Proceeds received, net of offering costs				$ 18	$ 17
401(K)
Debt and Credit Agreements
Stock issued (in shares) | shares				157,000	522,400
Equity
Stock issued (in shares) | shares				157,000	522,400
Proceeds received, net of offering costs				$ 10	$ 30
Optional cash investments
Debt and Credit Agreements
Stock issued (in shares) | shares				109,750	26,475
Equity
Stock issued (in shares) | shares				109,750	26,475
Proceeds received, net of offering costs				$ 7	$ 2
Employee Stock Purchase Plan
Debt and Credit Agreements
Stock issued (in shares) | shares				36,912
Equity
Stock issued (in shares) | shares				36,912
Proceeds received, net of offering costs				$ 2
Edison International
Basis of Presentation
Cash dividends received from consolidated subsidiaries				$ 1,300	975	$ 1,300
Debt and Credit Agreements
Covenant debt to total capitalization ratio			0.70	0.70
Actual debt to capitalization ratio			0.64	0.64
Equity
Proceeds received, net of offering costs				$ 2,000
Liquidation value (in dollars per share) | $ / shares			$ 1,000	$ 1,000
Equity contribution				$ 900
Related Party Transactions
Expenses from services provided by SCE				2	2	2
Interest expense from loans due to affiliates				3	5	$ 4
Current receivables due from affiliates			$ 389	389	361
Current payables due to affiliates			166	166	211
Long-term receivables due from affiliate			8	8	52
Long-term payables due to affiliates			130	130	$ 227
Edison International | 2.95% Senior notes due 2023
Debt and Credit Agreements
Long-term debt			$ 400	$ 400
Interest rate on debt (as a percent)			2.95%	2.95%
Edison International | 3.55% Senior note due 2024
Debt and Credit Agreements
Long-term debt			$ 500	$ 500
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	$ 400
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	$ 400
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	$ 600
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	$ 550
Interest rate on debt (as a percent)			4.125%	4.125%
Edison International | 6.95% senior notes due in 2029
Debt and Credit Agreements
Long-term debt			$ 550	$ 550
Interest rate on debt (as a percent)			6.95%	6.95%
Edison International | Multi-year credit facilities
Debt and Credit Agreements
Commitment			$ 1,500	$ 1,500
Outstanding borrowings			90	90
Amount available			$ 1,410	$ 1,410
Contingent maximum available borrowing										$ 2,000
Edison International | 0.70% term loan due April 2023
Debt and Credit Agreements
Debt, face amount		$ 600
Edison International | 0.70% term loan due April 2023 | SOFR
Debt and Credit Agreements
Basis points		0.70%
Edison International | 0.95% term loan due in November 2023
Debt and Credit Agreements
Debt, face amount	$ 400
Edison International | 0.95% term loan due in November 2023 | SOFR
Debt and Credit Agreements
Basis points	0.95%
Edison International | Series A
Debt and Credit Agreements
Stock issued (in shares) | shares				1,250,000
Equity
Stock issued (in shares) | shares				1,250,000
Preferred stock, dividend rate, (as a percent)				5.375%
Margin rate for dividend rate reset (as a percent)			4.698%	4.698%
Edison International | Series B
Debt and Credit Agreements
Stock issued (in shares) | shares				750,000
Equity
Stock issued (in shares) | shares				750,000
Preferred stock, dividend rate, (as a percent)				5.00%
Margin rate for dividend rate reset (as a percent)			3.901%	3.901%
Edison International | At-the-market Program (ATM)
Debt and Credit Agreements
Stock issued (in shares) | shares			0	0
Equity
Aggregate sale price									$ 500,000
Stock issued (in shares) | shares			0	0