Schedule I - Condensed Financial Information of Parent (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Assets:
Cash and cash equivalents	$ 914	$ 390
Other current assets	397	249
Total current assets	7,070	5,491
Other long-term assets	1,237	1,485
Total assets	78,041	74,745
Liabilities and equity:
Short-term debt	2,015	2,354
Current portion of long-term debt	2,614	1,077
Other current liabilities	1,601	1,667
Total current liabilities	10,347	8,609
Long-term debt	27,025	24,170
Other long-term liabilities	2,988	3,105
Total equity	17,522	17,789	$ 15,949	$ 15,496
Total liabilities and equity	78,041	74,745
Condensed Statements of Income:
Interest income from affiliates	17,220	14,905	13,578
Operating, interest and other expenses	15,737	13,428	12,361
Operating income	1,483	1,477	1,217
Income before income taxes	662	789	566
Income tax (benefit) expense	(162)	(136)	(305)
Net income	824	925	871
Preferred stock dividend requirement of Edison International	74	60
Less: Preferred and preference stock dividend requirements	105	60
Net income attributable to Edison International common shareholders	612	759	739
Condensed Statements of Comprehensive Income
Net income	824	925	871
Other comprehensive income, net of tax	43	15
Comprehensive income attributable to Edison International	760	834	739
Condensed Statements of Cash Flows:
Net cash provided by operating activities	3,216	11	1,263
Cash flows from financing activities:
Long-term debt issued	5,971	5,412	3,073
Long-term debt repaid	(1,085)	(1,037)	(1,099)
Short-term debt issued	1,000	2,654	2,994
Short-term debt repaid	(1,543)	(2,255)	(1,126)
Common stock issued	13	32	912
Preferred stock issued, net		1,977
Commercial paper borrowing (repayments), net	(317)	(254)	304
Common stock dividends paid	(1,050)	(988)	(928)
Preferred and preference stock dividends paid	(99)	(35)
Net cash provided by financing activities	2,881	5,445	3,727
Net cash used in investing activities	(5,574)	(5,151)	(4,971)
Net increase in cash, cash equivalents and restricted cash	523	305	19
Cash, cash equivalents and restricted cash at beginning of period	394	89	70
Cash, cash equivalents and restricted cash at end of period	917	394	89
Edison International
Assets:
Cash and cash equivalents	4	52
Other current assets	447	403
Total current assets	451	455
Investments in subsidiaries	19,922	18,924
Deferred income taxes	626	697
Other long-term assets	62	68
Total assets	21,061	20,144
Liabilities and equity:
Short-term debt	1,090	0
Current portion of long-term debt	400	700
Other current liabilities	575	583
Total current liabilities	2,065	1,283
Long-term debt	2,981	2,438
Other long-term liabilities	394	535
Total equity	15,621	15,888
Total liabilities and equity	21,061	20,144
Condensed Statements of Income:
Interest income from affiliates	3	0	1
Operating, interest and other expenses	209	176	189
Operating income	(206)	(176)	(188)
Equity in earnings (loss) of subsidiaries	867	956	851
Income before income taxes	661	780	663
Income tax (benefit) expense	(56)	(39)	(76)
Net income	717	819	739
Preferred stock dividend requirement of Edison International	105	60	0
Net income attributable to Edison International common shareholders	612	759	739
Condensed Statements of Comprehensive Income
Net income	717	819	739
Other comprehensive income, net of tax	43	15	0
Comprehensive income attributable to Edison International	760	834	739
Condensed Statements of Cash Flows:
Net cash provided by operating activities	1,133	817	1,171
Cash flows from financing activities:
Long-term debt issued	945	0	400
Long-term debt issuance costs	(6)	0	(3)
Long-term debt repaid	(700)	0	(400)
Short-term debt issued	1,000	0	800
Short-term debt repaid	0	0	(800)
Common stock issued	13	32	912
Preferred stock issued, net	0	1,977	0
Payable due to affiliates	(14)	(13)	135
Commercial paper borrowing (repayments), net	89	(130)	129
Payments for stock-based compensation	(8)	(3)	(3)
Receipts from stock-based compensation	72	31	21
Common stock dividends paid	(1,050)	(988)	(928)
Preferred and preference stock dividends paid	(99)	(35)	0
Net cash provided by financing activities	242	871	263
Capital contributions to affiliate	(1,426)	(1,639)	(1,446)
Dividends from affiliate	3	0	0
Net cash used in investing activities	(1,423)	(1,639)	(1,446)
Net increase in cash, cash equivalents and restricted cash	(48)	49	(12)
Cash, cash equivalents and restricted cash at beginning of period	52	3	15
Cash, cash equivalents and restricted cash at end of period	$ 4	$ 52	$ 3