Consolidated Statements of Changes in Equity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 17,675	$ 17,632	$ 17,789	$ 17,313	$ 17,223	$ 15,949	$ 17,789	$ 15,949
Net (loss) income	(74)	292	136	(297)	361	290
Other comprehensive income	1	4	2	2	2	2	7	6
Common stock issued, net of issuance cost	28	27	12	10	14	21
Preferred stock issued, net of issuance cost						1,237
Preferred stock issuance cost					(2)
Common stock dividends declared	(267)	(267)	(267)	(252)	(252)	(251)
Preferred stock dividend declared	(53)		(21)	(17)	(17)	(4)
Dividends to noncontrolling interests	(27)	(25)	(26)	(27)	(26)	(27)
Noncash stock-based compensation	10	12	7	10	10	6
Ending balance	$ 17,293	$ 17,675	$ 17,632	$ 16,742	$ 17,313	$ 17,223	17,293	16,742
Dividends declared per common share (in dollars per share)	$ 0.7000	$ 0.7000	$ 0.7000	$ 0.6625	$ 0.6625	$ 0.6625
Preferred stock dividends (in dollars per share)				$ 3.4375	$ 13.2882	$ 3.434
Series A
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred stock dividends (in dollars per share)	26.875		26.875
Series B
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred stock dividends (in dollars per share)	$ 25.000		$ 17.08333
Preferred stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 1,977	$ 1,977	$ 1,977	$ 1,235	$ 1,237		1,977
Preferred stock issued, net of issuance cost						$ 1,237
Preferred stock issuance cost					(2)
Ending balance	1,977	1,977	1,977	1,235	1,235	1,237	1,977	1,235
Common Stock, Including APIC
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	6,129	6,090	6,071	6,013	5,989	5,962	6,071	5,962
Common stock issued, net of issuance cost	28	27	12	10	14	21
Noncash stock-based compensation	10	12	7	10	10	6
Ending balance	6,167	6,129	6,090	6,033	6,013	5,989	6,167	6,033
Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(48)	(52)	(54)	(65)	(67)	(69)	(54)	(69)
Other comprehensive income	1	4	2	2	2	2
Ending balance	(47)	(48)	(52)	(63)	(65)	(67)	(47)	(63)
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	7,716	7,716	7,894	8,229	8,163	8,155	7,894	8,155
Net (loss) income	(101)	267	110	(324)	335	263
Common stock dividends declared	(267)	(267)	(267)	(252)	(252)	(251)
Preferred stock dividend declared	(53)		(21)	(17)	(17)	(4)
Ending balance	7,295	7,716	7,716	7,636	8,229	8,163	7,295	7,636
Equity Attributable to Common Shareholders
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	15,774	15,731	15,888	15,412	15,322	14,048	15,888	14,048
Net (loss) income	(101)	267	110	(324)	335	263
Other comprehensive income	1	4	2	2	2	2
Common stock issued, net of issuance cost	28	27	12	10	14	21
Preferred stock issued, net of issuance cost						1,237
Preferred stock issuance cost					(2)
Common stock dividends declared	(267)	(267)	(267)	(252)	(252)	(251)
Preferred stock dividend declared	(53)		(21)	(17)	(17)	(4)
Noncash stock-based compensation	10	12	7	10	10	6
Ending balance	15,392	15,774	15,731	14,841	15,412	15,322	15,392	14,841
Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,901	1,901	1,901	1,901	1,901	1,901	1,901	1,901
Net (loss) income	27	25	26	27	26	27
Dividends to noncontrolling interests	(27)	(25)	(26)	(27)	(26)	(27)
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 [Roll Forward]
Preferred stock dividends (in dollars per share)					$ 15.625
Preference stock dividends (in dollars per share)	$ 17.8564	$ 14.017	$ 11.160	$ 15.625		$ 15.625
Noncontrolling Interest | Maximum
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred stock dividends (in dollars per share)					$ 35.936
Preference stock dividends (in dollars per share)	$ 35.937	$ 35.937	$ 35.937	$ 35.936		$ 35.936
SCE
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 20,337	$ 19,652	$ 19,835	$ 19,887	$ 19,522	$ 18,650	19,835	18,650
Net (loss) income	(53)	327	173	(257)	385	323
Other comprehensive income	1	3	1	2	1	2	5	5
Capital contribution from Edison International Parent		700		83	325	900
Common stock dividends declared	(325)	(325)	(325)	(325)	(325)	(325)
Preferred stock dividend declared	(27)	(25)	(26)	(27)	(26)	(27)
Stock-based compensation	(2)	(1)	(9)			(4)
Noncash stock-based compensation	5	6	3	5	5	3
Ending balance	$ 19,936	$ 20,337	$ 19,652	$ 19,368	$ 19,887	$ 19,522	19,936	19,368
Dividends declared per common share (in dollars per share)	$ 0.7473	$ 0.7473	$ 0.7473		$ 0.7473	$ 0.7473
SCE | Minimum
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred stock dividends (in dollars per share)					15.625
Preference stock dividends (in dollars per share)	17.8564	14.017	11.160	$ 15.625		15.625
SCE | Maximum
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred stock dividends (in dollars per share)					$ 35.936
Preference stock dividends (in dollars per share)	$ 35.937	$ 35.937	$ 35.937	$ 35.936		$ 35.936
SCE | Preferred stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
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 [Roll Forward]
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 [Roll Forward]
Beginning balance	7,732	7,028	7,033	6,616	6,286	5,387	7,033	5,387
Capital contribution from Edison International Parent		700		83	325	900
Stock-based compensation	(2)	(1)	(9)			(4)
Noncash stock-based compensation	5	5	4	5	5	3
Ending balance	7,735	7,732	7,028	6,704	6,616	6,286	7,735	6,704
SCE | Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(28)	(31)	(32)	(38)	(39)	(41)	(32)	(41)
Other comprehensive income	1	3	1	2	1	2
Ending balance	(27)	(28)	(31)	(36)	(38)	(39)	(27)	(36)
SCE | Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	8,520	8,542	8,721	9,196	9,162	9,191	8,721	9,191
Net (loss) income	(53)	327	173	(257)	385	323
Common stock dividends declared	(325)	(325)	(325)	(325)	(325)	(325)
Preferred stock dividend declared	(27)	(25)	(26)	(27)	(26)	(27)
Noncash stock-based compensation		1	(1)
Ending balance	$ 8,115	$ 8,520	$ 8,542	$ 8,587	$ 9,196	$ 9,162	$ 8,115	$ 8,587