Consolidated Statements of Changes in Equity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Increase (decrease) in Stockholders' Equity
Beginning balance	$ 17,694	$ 17,549	$ 17,522	$ 17,675	$ 17,632	$ 17,789	$ 17,522	$ 17,789
Net income (loss)	212	409	365	(74)	292	136	986	354
Other comprehensive income		1	2	1	4	2	3	7
Common stock issued, net of issuance cost	19	35	15	28	27	12
Common stock dividends declared	(283)	(283)	(282)	(267)	(267)	(267)
Preferred stock dividend declared	(53)		(52)	(53)		(21)
Dividends to noncontrolling interests	(30)	(29)	(29)	(27)	(25)	(26)
Noncash stock-based compensation	12	12	8	10	12	7
Ending Balance	$ 17,571	$ 17,694	$ 17,549	$ 17,293	$ 17,675	$ 17,632	17,571	17,293
Dividends declared per common share (in dollars per share)	$ 0.7375	$ 0.7375	$ 0.7375	$ 0.7000	$ 0.7000	$ 0.7000
Series A
Increase (decrease) in Stockholders' Equity
Preferred stock dividends (in dollars per share)	26.875		26.875	26.875		26.875
Series B
Increase (decrease) in Stockholders' Equity
Preferred stock dividends (in dollars per share)	$ 25.00		$ 25.00	$ 25.00		$ 17.08333
Preferred stock
Increase (decrease) in Stockholders' Equity
Beginning balance	$ 1,978	$ 1,978	$ 1,978	$ 1,977	$ 1,977	$ 1,977	1,978	1,977
Ending Balance	1,978	1,978	1,978	1,977	1,977	1,977	1,978	1,977
Common Stock, Including APIC
Increase (decrease) in Stockholders' Equity
Beginning balance	6,270	6,223	6,200	6,129	6,090	6,071	6,200	6,071
Common stock issued, net of issuance cost	19	35	15	28	27	12
Noncash stock-based compensation	12	12	8	10	12	7
Ending Balance	6,301	6,270	6,223	6,167	6,129	6,090	6,301	6,167
Accumulated Other Comprehensive Loss
Increase (decrease) in Stockholders' Equity
Beginning balance	(8)	(9)	(11)	(48)	(52)	(54)	(11)	(54)
Other comprehensive income		1	2	1	4	2
Ending Balance	(8)	(8)	(9)	(47)	(48)	(52)	(8)	(47)
Retained Earnings
Increase (decrease) in Stockholders' Equity
Beginning balance	7,553	7,456	7,454	7,716	7,716	7,894	7,454	7,894
Net income (loss)	182	380	336	(101)	267	110
Common stock dividends declared	(283)	(283)	(282)	(267)	(267)	(267)
Preferred stock dividend declared	(53)		(52)	(53)		(21)
Ending Balance	7,399	7,553	7,456	7,295	7,716	7,716	7,399	7,295
Equity Attributable to Common Shareholders
Increase (decrease) in Stockholders' Equity
Beginning balance	15,793	15,648	15,621	15,774	15,731	15,888	15,621	15,888
Net income (loss)	182	380	336	(101)	267	110
Other comprehensive income		1	2	1	4	2
Common stock issued, net of issuance cost	19	35	15	28	27	12
Common stock dividends declared	(283)	(283)	(282)	(267)	(267)	(267)
Preferred stock dividend declared	(53)		(52)	(53)		(21)
Noncash stock-based compensation	12	12	8	10	12	7
Ending Balance	15,670	15,793	15,648	15,392	15,774	15,731	15,670	15,392
Noncontrolling Interest
Increase (decrease) in Stockholders' Equity
Beginning balance	1,901	1,901	1,901	1,901	1,901	1,901	1,901	1,901
Net income (loss)	30	29	29	27	25	26
Dividends to noncontrolling interests	(30)	(29)	(29)	(27)	(25)	(26)
Ending Balance	$ 1,901	$ 1,901	$ 1,901	$ 1,901	$ 1,901	$ 1,901	1,901	1,901
Noncontrolling Interest | Minimum
Increase (decrease) in Stockholders' Equity
Preferred stock dividends (in dollars per share)	$ 25.1276	$ 24.273	$ 22.281	$ 17.8564	$ 14.017	$ 11.160
Noncontrolling Interest | Maximum
Increase (decrease) in Stockholders' Equity
Preferred stock dividends (in dollars per share)	$ 35.937	$ 35.937	$ 35.937	$ 35.937	$ 35.937	$ 35.937
SCE
Increase (decrease) in Stockholders' Equity
Beginning balance	$ 20,881	$ 20,807	$ 20,789	$ 20,337	$ 19,652	$ 19,835	20,789	19,835
Net income (loss)	269	449	399	(53)	327	173	1,117	447
Other comprehensive income				1	3	1		5
Capital contribution from Edison International Parent					700
Common stock dividends declared	(350)	(350)	(350)	(325)	(325)	(325)
Preferred stock dividend declared	(30)	(29)	(29)	(27)	(25)	(26)
Stock-based compensation	(1)	(3)	(8)	(2)	(1)	(9)
Noncash stock-based compensation	6	7	6	5	6	3
Ending Balance	$ 20,775	$ 20,881	$ 20,807	$ 19,936	$ 20,337	$ 19,652	20,775	19,936
Dividends declared per common share (in dollars per share)	$ 0.8048	$ 0.8048	$ 0.8048	$ 0.7473	$ 0.7473	$ 0.7473
SCE | Minimum
Increase (decrease) in Stockholders' Equity
Preferred stock dividends (in dollars per share)	25.1276	24.273	22.281	17.8564	14.017	11.160
SCE | Maximum
Increase (decrease) in Stockholders' Equity
Preferred stock dividends (in dollars per share)	$ 35.937	$ 35.937	$ 35.937	$ 35.937	$ 35.937	$ 35.937
SCE | Preferred stock
Increase (decrease) in Stockholders' Equity
Beginning balance	$ 1,945	$ 1,945	$ 1,945	$ 1,945	$ 1,945	$ 1,945	1,945	1,945
Ending Balance	1,945	1,945	1,945	1,945	1,945	1,945	1,945	1,945
SCE | Common stock
Increase (decrease) in Stockholders' Equity
Beginning balance	2,168	2,168	2,168	2,168	2,168	2,168	2,168	2,168
Ending Balance	2,168	2,168	2,168	2,168	2,168	2,168	2,168	2,168
SCE | Additional Paid-in Capital
Increase (decrease) in Stockholders' Equity
Beginning balance	8,442	8,438	8,441	7,732	7,028	7,033	8,441	7,033
Capital contribution from Edison International Parent					700
Stock-based compensation	(1)	(3)	(8)	(2)	(1)	(9)
Noncash stock-based compensation	6	7	5	5	5	4
Ending Balance	8,447	8,442	8,438	7,735	7,732	7,028	8,447	7,735
SCE | Accumulated Other Comprehensive Loss
Increase (decrease) in Stockholders' Equity
Beginning balance	(8)	(8)	(8)	(28)	(31)	(32)	(8)	(32)
Other comprehensive income				1	3	1
Ending Balance	(8)	(8)	(8)	(27)	(28)	(31)	(8)	(27)
SCE | Retained Earnings
Increase (decrease) in Stockholders' Equity
Beginning balance	8,334	8,264	8,243	8,520	8,542	8,721	8,243	8,721
Net income (loss)	269	449	399	(53)	327	173
Common stock dividends declared	(350)	(350)	(350)	(325)	(325)	(325)
Preferred stock dividend declared	(30)	(29)	(29)	(27)	(25)	(26)
Noncash stock-based compensation			1		1	(1)
Ending Balance	$ 8,223	$ 8,334	$ 8,264	$ 8,115	$ 8,520	$ 8,542	$ 8,223	$ 8,115