Compensation and Benefit Plans (Pension Assets Fair Value) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Domestic mortgage backed securities
Pension and Other Postretirement Benefits
Actual plan asset allocations, percentage		20.00%
Pension Plans
Pension and Other Postretirement Benefits
Fair value of plan assets	$ 3,545	$ 4,323
Receivables and payables, net	(83)	(27)
Net plan assets available for benefits	$ 3,462	$ 4,296	$ 4,171
Publicly traded equity investments located in the US (percent)	61.00%	62.00%
Pension Plans | Level 1
Pension and Other Postretirement Benefits
Fair value of plan assets	$ 728	$ 748
Pension Plans | Level 2
Pension and Other Postretirement Benefits
Fair value of plan assets	1,317	1,782
Pension Plans | NAV
Pension and Other Postretirement Benefits
Fair value of plan assets	1,500	1,793
Pension Plans | Government and agency securities
Pension and Other Postretirement Benefits
Fair value of plan assets	574	1,135
Pension Plans | Government and agency securities | Level 1
Pension and Other Postretirement Benefits
Fair value of plan assets	281	217
Pension Plans | Government and agency securities | Level 2
Pension and Other Postretirement Benefits
Fair value of plan assets	293	918
Pension Plans | Government and agency securities | NAV
Pension and Other Postretirement Benefits
Fair value of plan assets	0
Pension Plans | Corporate stocks
Pension and Other Postretirement Benefits
Fair value of plan assets	$ 230	$ 470
Pension Plans | Corporate stocks | Russell Indexes
Pension and Other Postretirement Benefits
Performance percentage benchmark, percentage	36.00%	44.00%
Pension Plans | Corporate stocks | MSCI
Pension and Other Postretirement Benefits
Performance percentage benchmark, percentage	64.00%	56.00%
Pension Plans | Corporate stocks | Level 1
Pension and Other Postretirement Benefits
Fair value of plan assets	$ 227	$ 466
Pension Plans | Corporate stocks | Level 2
Pension and Other Postretirement Benefits
Fair value of plan assets	3	4
Pension Plans | Corporate stocks | NAV
Pension and Other Postretirement Benefits
Fair value of plan assets	0
Pension Plans | Corporate bonds
Pension and Other Postretirement Benefits
Fair value of plan assets	973	815
Pension Plans | Corporate bonds | Level 1
Pension and Other Postretirement Benefits
Fair value of plan assets	$ 0
Actual plan asset allocations, percentage	56.00%
Pension Plans | Corporate bonds | Level 2
Pension and Other Postretirement Benefits
Fair value of plan assets	$ 973	815
Pension Plans | Corporate bonds | NAV
Pension and Other Postretirement Benefits
Fair value of plan assets	0
Pension Plans | Collateralized mortgage obligations and other asset backed securities
Pension and Other Postretirement Benefits
Fair value of plan assets	67	61
Pension Plans | Common/collective funds
Pension and Other Postretirement Benefits
Fair value of plan assets	$ 658	$ 964
Pension Plans | Common/collective funds | Standard and Poor's 500
Pension and Other Postretirement Benefits
Performance percentage benchmark, percentage	41.00%	41.00%
Pension Plans | Common/collective funds | Russell 1000 Index
Pension and Other Postretirement Benefits
Performance percentage benchmark, percentage		10.00%
Pension Plans | Common/collective funds | MSCI all country world index exUS
Pension and Other Postretirement Benefits
Performance percentage benchmark, percentage	46.00%	38.00%
Pension Plans | Common/collective funds | Non-index U.S. equity fund
Pension and Other Postretirement Benefits
Performance percentage benchmark, percentage	11.00%	9.00%
Pension Plans | Common/collective funds | Level 1
Pension and Other Postretirement Benefits
Fair value of plan assets	$ 0
Pension Plans | Common/collective funds | Level 2
Pension and Other Postretirement Benefits
Fair value of plan assets	0
Pension Plans | Common/collective funds | NAV
Pension and Other Postretirement Benefits
Fair value of plan assets	658	$ 964
Pension Plans | Partnerships/joint ventures
Pension and Other Postretirement Benefits
Fair value of plan assets	$ 613	688
Actual plan asset allocations, percentage	18.00%
Pension Plans | Partnerships/joint ventures | Level 1
Pension and Other Postretirement Benefits
Fair value of plan assets	$ 0
Pension Plans | Partnerships/joint ventures | Level 2
Pension and Other Postretirement Benefits
Fair value of plan assets	0
Pension Plans | Partnerships/joint ventures | NAV
Pension and Other Postretirement Benefits
Fair value of plan assets	613	688
Pension Plans | Other investment entities
Pension and Other Postretirement Benefits
Fair value of plan assets	63	110
Pension Plans | Other investment entities | Level 1
Pension and Other Postretirement Benefits
Fair value of plan assets	0
Pension Plans | Other investment entities | Level 2
Pension and Other Postretirement Benefits
Fair value of plan assets	0
Pension Plans | Other investment entities | NAV
Pension and Other Postretirement Benefits
Fair value of plan assets	63	110
Pension Plans | Registered investment companies
Pension and Other Postretirement Benefits
Fair value of plan assets	365	88
Pension Plans | Registered investment companies | Level 1
Pension and Other Postretirement Benefits
Fair value of plan assets	206	$ 57
Actual plan asset allocations, percentage		63.00%
Pension Plans | Registered investment companies | Level 2
Pension and Other Postretirement Benefits
Fair value of plan assets	0
Pension Plans | Registered investment companies | NAV
Pension and Other Postretirement Benefits
Fair value of plan assets	159	$ 31
Pension Plans | Interest-bearing cash
Pension and Other Postretirement Benefits
Fair value of plan assets	14	8
Pension Plans | Interest-bearing cash | Level 1
Pension and Other Postretirement Benefits
Fair value of plan assets	14	8
Pension Plans | Interest-bearing cash | Level 2
Pension and Other Postretirement Benefits
Fair value of plan assets	0
Pension Plans | Interest-bearing cash | NAV
Pension and Other Postretirement Benefits
Fair value of plan assets	0
Pension Plans | Other investments
Pension and Other Postretirement Benefits
Fair value of plan assets	55	45
Pension Plans | Other investments | Level 1
Pension and Other Postretirement Benefits
Fair value of plan assets	0
Pension Plans | Other investments | Level 2
Pension and Other Postretirement Benefits
Fair value of plan assets	48	$ 45
Pension Plans | Other investments | NAV
Pension and Other Postretirement Benefits
Fair value of plan assets	$ 7
Pension Plans | Private equity and venture capital funds including branded consumer products, clean and information technology and healthcare
Pension and Other Postretirement Benefits
Actual plan asset allocations, percentage	76.00%	62.00%
Pension Plans | Asset backed securities including distressed mortgages
Pension and Other Postretirement Benefits
Actual plan asset allocations, percentage		17.00%
Pension Plans | Publicly traded fixed income securities
Pension and Other Postretirement Benefits
Actual plan asset allocations, percentage		15.00%
Pension Plans | Broad range of financial assets in all global markets
Pension and Other Postretirement Benefits
Actual plan asset allocations, percentage	2.00%	3.00%
Pension Plans | Emerging market equity securities
Pension and Other Postretirement Benefits
Actual plan asset allocations, percentage		71.00%
Pension Plans | Domestic mortgage backed securities
Pension and Other Postretirement Benefits
Actual plan asset allocations, percentage	64.00%
Pension Plans | High yield debt securities
Pension and Other Postretirement Benefits
Actual plan asset allocations, percentage	36.00%
Pension Plans | Equity Funds
Pension and Other Postretirement Benefits
Actual plan asset allocations, percentage	22.00%
Pension Plans | Fixed Income Funds
Pension and Other Postretirement Benefits
Actual plan asset allocations, percentage	21.00%	35.00%
SCE | Pension Plans
Pension and Other Postretirement Benefits
Net plan assets available for benefits	$ 3,275	$ 4,061	$ 3,940