Equity - Summarizes Preference Stocks (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 01, 2024	May 31, 2024
Equity
Gain on shares acquired	$ 1	$ 16
Redemption amount (in dollars per share)	$ 1,000
Redemption amount following change in criteria (in dollars per share)	$ 1,020
Preferred stock, shares authorized (in shares)	50,000,000	50,000,000
Preference stocks summary
Dividends (in dollars per share)			$ 3.31
Preferred stock (50,000,000 shares authorized; 1,159,317 shares of Series A and 503,454 and 532,454 shares of Series B issued and outstanding at respective dates)	$ 1,645	$ 1,673
Edison International's preference stock of utility	$ 2,175	$ 2,443
Preferred Stock
Equity
Liquidation value (in dollars per share)	$ 1,000
6.95% Series N
Equity
Preferred stock, dividend rate, (as a percent)	6.95%	6.95%
SCE
Preference stocks summary
Preferred stock (50,000,000 shares authorized; 1,159,317 shares of Series A and 503,454 and 532,454 shares of Series B issued and outstanding at respective dates)	$ 2,220	$ 2,495
SCE | Preferred Stock
Equity
Preferred stock, shares issued (in shares)	0
Dividends in arrears preferred stock	$ 0
Preference stocks summary
Preferred stock (50,000,000 shares authorized; 1,159,317 shares of Series A and 503,454 and 532,454 shares of Series B issued and outstanding at respective dates)	2,220	2,495
Less: issuance costs	$ (45)	$ (52)
SCE | Series E Preferred Stock
Equity
Preferred stock, shares outstanding (in shares)	0	0
Preference stocks summary
Preferred stock, variable dividend rate, (as a percent)	4.199%	4.199%
Redemption price (in dollars per share)	$ 1,000	$ 1,000
Dividends (in dollars per share)	$ 24.418	$ 24.418
Preferred stock (50,000,000 shares authorized; 1,159,317 shares of Series A and 503,454 and 532,454 shares of Series B issued and outstanding at respective dates)	$ 0	$ 350
SCE | Series G Preferred Stock
Equity
Preferred stock, shares outstanding (in shares)	88,004	88,004
Preferred stock, dividend rate, (as a percent)	5.10%	5.10%
Preference stocks summary
Redemption price (in dollars per share)	$ 2,500	$ 2,500
Dividends (in dollars per share)	$ 127.500	$ 127.500
Preferred stock (50,000,000 shares authorized; 1,159,317 shares of Series A and 503,454 and 532,454 shares of Series B issued and outstanding at respective dates)	$ 220	$ 220
SCE | Series H Preferred Stock
Equity
Preferred stock, shares outstanding (in shares)	0	0
Preferred stock, dividend rate, (as a percent)	2.99%	2.99%
Preference stocks summary
Redemption price (in dollars per share)	$ 2,500	$ 2,500
Dividends (in dollars per share)	$ 187.776	$ 187.776
Preferred stock (50,000,000 shares authorized; 1,159,317 shares of Series A and 503,454 and 532,454 shares of Series B issued and outstanding at respective dates)	$ 0	$ 275
SCE | 5.375% Series J
Equity
Preferred stock, shares outstanding (in shares)	130,004	130,004
Preferred stock, dividend rate, (as a percent)	5.375%	5.375%
Preference stocks summary
Redemption price (in dollars per share)	$ 2,500	$ 2,500
Dividends (in dollars per share)	$ 134.375	$ 134.375
Preferred stock (50,000,000 shares authorized; 1,159,317 shares of Series A and 503,454 and 532,454 shares of Series B issued and outstanding at respective dates)	$ 325	$ 325
SCE | 5.45% Series K
Equity
Preferred stock, shares outstanding (in shares)	120,004	120,004
Preferred stock, dividend rate, (as a percent)	5.45%	5.45%
Preference stocks summary
Redemption price (in dollars per share)	$ 2,500	$ 2,500
Dividends (in dollars per share)	$ 136.250	$ 136.250
Preferred stock (50,000,000 shares authorized; 1,159,317 shares of Series A and 503,454 and 532,454 shares of Series B issued and outstanding at respective dates)	$ 300	$ 300
SCE | 5.00% Series L
Equity
Preferred stock, shares outstanding (in shares)	190,004	190,004
Preferred stock, dividend rate, (as a percent)	5.00%	5.00%
Preference stocks summary
Redemption price (in dollars per share)	$ 2,500	$ 2,500
Dividends (in dollars per share)	$ 125.000	$ 125.000
Preferred stock (50,000,000 shares authorized; 1,159,317 shares of Series A and 503,454 and 532,454 shares of Series B issued and outstanding at respective dates)	$ 475	$ 475
SCE | 7.50% Series M
Equity
Preferred stock, shares outstanding (in shares)	220,004	220,004
Preference stocks summary
Redemption price (in dollars per share)	$ 2,500	$ 2,500
Dividends (in dollars per share)	$ 199.479	$ 199.479
Preferred stock (50,000,000 shares authorized; 1,159,317 shares of Series A and 503,454 and 532,454 shares of Series B issued and outstanding at respective dates)	$ 550	$ 550
SCE | 6.95% Series N
Equity
Preferred stock, shares outstanding (in shares)	140,004	140,004
Preferred stock, dividend rate, (as a percent)	7.50%	7.50%
Preference stocks summary
Redemption price (in dollars per share)	$ 2,500	$ 2,500
Dividends (in dollars per share)	$ 102.319	$ 102.319
Preferred stock (50,000,000 shares authorized; 1,159,317 shares of Series A and 503,454 and 532,454 shares of Series B issued and outstanding at respective dates)	$ 350	$ 0
SCE | Series N Preference Stock
Preference stocks summary
Preferred stock (50,000,000 shares authorized; 1,159,317 shares of Series A and 503,454 and 532,454 shares of Series B issued and outstanding at respective dates)				$ 350