Consolidated Statements of Changes in Equity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 17,632	$ 17,789	$ 17,223	$ 15,949	$ 17,789	$ 15,949
Net income	292	136	361	290
Other comprehensive income (loss)	4	2	2	2	6	4
Common stock issued, net of issuance cost	27	12	14	21
Preferred stock issued, net of issuance cost				1,237
Preferred stock issuance cost			(2)
Common stock dividends declared	(267)	(267)	(252)	(251)
Preferred stock dividend declared		(21)	(17)	(4)
Dividends to noncontrolling interests	(25)	(26)	(26)	(27)
Noncash stock-based compensation	12	7	10	6
Ending balance	$ 17,675	$ 17,632	$ 17,313	$ 17,223	17,675	17,313
Dividends declared per common share (in dollars per share)	$ 0.7000	$ 0.7000	$ 0.6625	$ 0.6625
Preferred stock dividends (in dollars per share)			$ 13.2882	$ 3.434
Series A
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred stock dividends (in dollars per share)		26.875
Series B
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred stock dividends (in dollars per share)		$ 17.08333
Preferred stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 1,977	$ 1,977	$ 1,237		1,977
Preferred stock issued, net of issuance cost				$ 1,237
Preferred stock issuance cost			(2)
Ending balance	1,977	1,977	1,235	1,237	1,977	1,235
Common Stock, Including APIC
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	6,090	6,071	5,989	5,962	6,071	5,962
Common stock issued, net of issuance cost	27	12	14	21
Noncash stock-based compensation	12	7	10	6
Ending balance	6,129	6,090	6,013	5,989	6,129	6,013
Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(52)	(54)	(67)	(69)	(54)	(69)
Other comprehensive income (loss)	4	2	2	2
Ending balance	(48)	(52)	(65)	(67)	(48)	(65)
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	7,716	7,894	8,163	8,155	7,894	8,155
Net income	267	110	335	263
Common stock dividends declared	(267)	(267)	(252)	(251)
Preferred stock dividend declared		(21)	(17)	(4)
Ending balance	7,716	7,716	8,229	8,163	7,716	8,229
Equity Attributable to Common Shareholders
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	15,731	15,888	15,322	14,048	15,888	14,048
Net income	267	110	335	263
Other comprehensive income (loss)	4	2	2	2
Common stock issued, net of issuance cost	27	12	14	21
Preferred stock issued, net of issuance cost				1,237
Preferred stock issuance cost			(2)
Common stock dividends declared	(267)	(267)	(252)	(251)
Preferred stock dividend declared		(21)	(17)	(4)
Noncash stock-based compensation	12	7	10	6
Ending balance	15,774	15,731	15,412	15,322	15,774	15,412
Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,901	1,901	1,901	1,901	1,901	1,901
Net income	25	26	26	27
Dividends to noncontrolling interests	(25)	(26)	(26)	(27)
Ending balance	$ 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)	$ 14.017	$ 11.160		$ 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		$ 35.936
SCE
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 19,652	$ 19,835	$ 19,522	$ 18,650	19,835	18,650
Net income	327	173	385	323
Other comprehensive income (loss)	3	1	1	2	4	3
Capital contribution from Edison International Parent	700		325	900
Common stock dividends declared	(325)	(325)	(325)	(325)
Preferred stock dividend declared	(25)	(26)	(26)	(27)
Stock-based compensation	(1)	(9)		(4)
Noncash stock-based compensation	6	3	5	3
Ending balance	$ 20,337	$ 19,652	$ 19,887	$ 19,522	20,337	19,887
Dividends declared per common share (in dollars per share)	$ 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)	14.017	11.160		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		$ 35.936
SCE | Preferred stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 1,945	$ 1,945	$ 1,945	$ 1,945	1,945	1,945
Ending balance	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
Ending balance	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	7,028	7,033	6,286	5,387	7,033	5,387
Capital contribution from Edison International Parent	700		325	900
Stock-based compensation	(1)	(9)		(4)
Noncash stock-based compensation	5	4	5	3
Ending balance	7,732	7,028	6,616	6,286	7,732	6,616
SCE | Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(31)	(32)	(39)	(41)	(32)	(41)
Other comprehensive income (loss)	3	1	1	2
Ending balance	(28)	(31)	(38)	(39)	(28)	(38)
SCE | Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	8,542	8,721	9,162	9,191	8,721	9,191
Net income	327	173	385	323
Common stock dividends declared	(325)	(325)	(325)	(325)
Preferred stock dividend declared	(25)	(26)	(26)	(27)
Noncash stock-based compensation	1	(1)
Ending balance	$ 8,520	$ 8,542	$ 9,196	$ 9,162	$ 8,520	$ 9,196