Compensation and Benefit Plans (Pension Assets Fair Value) (Details) - Pension Plans - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension and Other Postretirement Benefits
Fair value of plan assets	$ 3,574	$ 3,545
Receivables and payables, net	35	(83)
Net plan assets available for benefits	$ 3,609	$ 3,462	$ 4,296
Publicly traded equity investments located in the US (percent)	62.00%	61.00%
Level 1
Pension and Other Postretirement Benefits
Fair value of plan assets	$ 654	$ 728
Level 2
Pension and Other Postretirement Benefits
Fair value of plan assets	1,460	1,317
NAV
Pension and Other Postretirement Benefits
Fair value of plan assets	1,460	1,500
Government and agency securities
Pension and Other Postretirement Benefits
Fair value of plan assets	608	574
Government and agency securities | Level 1
Pension and Other Postretirement Benefits
Fair value of plan assets	256	281
Government and agency securities | Level 2
Pension and Other Postretirement Benefits
Fair value of plan assets	352	293
Government and agency securities | NAV
Pension and Other Postretirement Benefits
Fair value of plan assets	0
Corporate stocks
Pension and Other Postretirement Benefits
Fair value of plan assets	$ 181	$ 230
Corporate stocks | Russell Indexes
Pension and Other Postretirement Benefits
Performance percentage benchmark, percentage	36.00%	36.00%
Corporate stocks | MSCI
Pension and Other Postretirement Benefits
Performance percentage benchmark, percentage	64.00%	64.00%
Corporate stocks | Level 1
Pension and Other Postretirement Benefits
Fair value of plan assets	$ 176	$ 227
Corporate stocks | Level 2
Pension and Other Postretirement Benefits
Fair value of plan assets	5	3
Corporate stocks | NAV
Pension and Other Postretirement Benefits
Fair value of plan assets	0
Corporate bonds
Pension and Other Postretirement Benefits
Fair value of plan assets	1,057	$ 973
Corporate bonds | Level 1
Pension and Other Postretirement Benefits
Fair value of plan assets	$ 0
Actual plan asset allocations, percentage	57.00%	56.00%
Corporate bonds | Level 2
Pension and Other Postretirement Benefits
Fair value of plan assets	$ 1,057	$ 973
Corporate bonds | NAV
Pension and Other Postretirement Benefits
Fair value of plan assets	0
Collateralized mortgage obligations and other asset backed securities
Pension and Other Postretirement Benefits
Fair value of plan assets	78	67
Common/collective funds
Pension and Other Postretirement Benefits
Fair value of plan assets	$ 584	$ 658
Common/collective funds | Standard and Poor's 500
Pension and Other Postretirement Benefits
Performance percentage benchmark, percentage	41.00%	41.00%
Common/collective funds | MSCI all country world index exUS
Pension and Other Postretirement Benefits
Performance percentage benchmark, percentage	40.00%	46.00%
Common/collective funds | Non-index U.S. equity fund
Pension and Other Postretirement Benefits
Performance percentage benchmark, percentage	16.00%	11.00%
Common/collective funds | Level 1
Pension and Other Postretirement Benefits
Fair value of plan assets	$ 0
Common/collective funds | Level 2
Pension and Other Postretirement Benefits
Fair value of plan assets	0
Common/collective funds | NAV
Pension and Other Postretirement Benefits
Fair value of plan assets	584	$ 658
Partnerships/joint ventures
Pension and Other Postretirement Benefits
Fair value of plan assets	$ 657	613
Actual plan asset allocations, percentage	17.00%
Partnerships/joint ventures | Level 1
Pension and Other Postretirement Benefits
Fair value of plan assets	$ 0
Partnerships/joint ventures | Level 2
Pension and Other Postretirement Benefits
Fair value of plan assets	0
Partnerships/joint ventures | NAV
Pension and Other Postretirement Benefits
Fair value of plan assets	657	613
Other investment entities
Pension and Other Postretirement Benefits
Fair value of plan assets	58	63
Other investment entities | Level 1
Pension and Other Postretirement Benefits
Fair value of plan assets	0
Other investment entities | Level 2
Pension and Other Postretirement Benefits
Fair value of plan assets	0
Other investment entities | NAV
Pension and Other Postretirement Benefits
Fair value of plan assets	58	63
Registered investment companies
Pension and Other Postretirement Benefits
Fair value of plan assets	365	365
Registered investment companies | Level 1
Pension and Other Postretirement Benefits
Fair value of plan assets	212	206
Registered investment companies | Level 2
Pension and Other Postretirement Benefits
Fair value of plan assets	0
Registered investment companies | NAV
Pension and Other Postretirement Benefits
Fair value of plan assets	153	159
Interest-bearing cash
Pension and Other Postretirement Benefits
Fair value of plan assets	10	14
Interest-bearing cash | Level 1
Pension and Other Postretirement Benefits
Fair value of plan assets	10	14
Interest-bearing cash | Level 2
Pension and Other Postretirement Benefits
Fair value of plan assets	0
Interest-bearing cash | NAV
Pension and Other Postretirement Benefits
Fair value of plan assets	0
Other investments
Pension and Other Postretirement Benefits
Fair value of plan assets	54	55
Other investments | Level 1
Pension and Other Postretirement Benefits
Fair value of plan assets	0
Other investments | Level 2
Pension and Other Postretirement Benefits
Fair value of plan assets	46	48
Other investments | NAV
Pension and Other Postretirement Benefits
Fair value of plan assets	$ 8	$ 7
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	74.00%	76.00%
Asset backed securities including distressed mortgages
Pension and Other Postretirement Benefits
Actual plan asset allocations, percentage		18.00%
Broad range of financial assets in all global markets
Pension and Other Postretirement Benefits
Actual plan asset allocations, percentage	5.00%	2.00%
Domestic mortgage backed securities
Pension and Other Postretirement Benefits
Actual plan asset allocations, percentage	68.00%	64.00%
High yield debt securities
Pension and Other Postretirement Benefits
Actual plan asset allocations, percentage	32.00%	36.00%
Equity Funds
Pension and Other Postretirement Benefits
Actual plan asset allocations, percentage	28.00%	22.00%
Fixed Income Funds
Pension and Other Postretirement Benefits
Actual plan asset allocations, percentage	13.00%	21.00%
SCE
Pension and Other Postretirement Benefits
Net plan assets available for benefits	$ 3,415	$ 3,275	$ 4,061