Consolidated Statements of Changes in Equity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 17,789	$ 15,949
Net income	136	290
Other comprehensive income (loss)	2	2
Common stock issued, net of issuance cost	12	21
Preferred stock issued, net of issuance cost		1,237
Common stock dividends declared	(267)	(251)
Preferred stock dividend declared	(21)	(4)
Dividends to noncontrolling interests	(26)	(27)
Noncash stock-based compensation	7	6
Ending balance	$ 17,632	$ 17,223
Dividends declared per common share (in dollars per share)	$ 0.7000	$ 0.6625
Preferred stock dividends (in dollars per share)		$ 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
Preferred stock issued, net of issuance cost		$ 1,237
Ending balance	1,977	1,237
Common Stock, Including APIC
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	6,071	5,962
Common stock issued, net of issuance cost	12	21
Noncash stock-based compensation	7	6
Ending balance	6,090	5,989
Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(54)	(69)
Other comprehensive income (loss)	2	2
Ending balance	(52)	(67)
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	7,894	8,155
Net income	110	263
Common stock dividends declared	(267)	(251)
Preferred stock dividend declared	(21)	(4)
Ending balance	7,716	8,163
Equity Attributable to Common Shareholders
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	15,888	14,048
Net income	110	263
Other comprehensive income (loss)	2	2
Common stock issued, net of issuance cost	12	21
Preferred stock issued, net of issuance cost		1,237
Common stock dividends declared	(267)	(251)
Preferred stock dividend declared	(21)	(4)
Noncash stock-based compensation	7	6
Ending balance	15,731	15,322
Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,901	1,901
Net income	26	27
Dividends to noncontrolling interests	(26)	(27)
Ending balance	$ 1,901	$ 1,901
Noncontrolling Interest | Minimum
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preference stock dividends (in dollars per share)	$ 11.160	$ 15.625
Noncontrolling Interest | Maximum
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preference stock dividends (in dollars per share)	$ 35.936	$ 35.936
SCE
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 19,835	$ 18,650
Net income	173	323
Other comprehensive income (loss)	1	2
Capital contribution from Edison International Parent		900
Common stock dividends declared	(325)	(325)
Preferred stock dividend declared	(26)	(27)
Stock-based compensation	(9)	(4)
Noncash stock-based compensation	3	3
Ending balance	$ 19,652	$ 19,522
Dividends declared per common share (in dollars per share)	$ 0.7473	$ 0.7473
SCE | Minimum
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preference stock dividends (in dollars per share)	11.160	15.625
SCE | Maximum
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preference stock dividends (in dollars per share)	$ 35.937	$ 35.936
SCE | Preferred stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 1,945	$ 1,945
Ending balance	1,945	1,945
SCE | Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	2,168	2,168
Ending balance	2,168	2,168
SCE | Additional Paid-in Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	7,033	5,387
Capital contribution from Edison International Parent		900
Stock-based compensation	(9)	(4)
Noncash stock-based compensation	4	3
Ending balance	7,028	6,286
SCE | Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(32)	(41)
Other comprehensive income (loss)	1	2
Ending balance	(31)	(39)
SCE | Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	8,721	9,191
Net income	173	323
Common stock dividends declared	(325)	(325)
Preferred stock dividend declared	(26)	(27)
Noncash stock-based compensation	(1)
Ending balance	$ 8,542	$ 9,162