Compensation and Benefit Plans - Pension Assets Fair Value (Details) - Pension Plan - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pension and Other Postretirement Benefits
Total	$ 3,682	$ 3,574
Receivables and payables, net	(74)	35
Net plan assets available for benefits	$ 3,608	$ 3,609	$ 3,462
Publicly traded equity investments located in the US (percent)	64.00%	62.00%
Level 1
Pension and Other Postretirement Benefits
Total	$ 644	$ 654
Level 2
Pension and Other Postretirement Benefits
Total	1,498	1,460
NAV
Pension and Other Postretirement Benefits
Total	1,540	1,460
U.S. government and agency securities
Pension and Other Postretirement Benefits
Total	597	608
U.S. government and agency securities | Level 1
Pension and Other Postretirement Benefits
Total	244	256
U.S. government and agency securities | Level 2
Pension and Other Postretirement Benefits
Total	353	352
U.S. government and agency securities | NAV
Pension and Other Postretirement Benefits
Total	0	0
Corporate stocks
Pension and Other Postretirement Benefits
Total	$ 152	$ 181
Corporate stocks | Russell Indexes
Pension and Other Postretirement Benefits
Performance percentage benchmark, percentage	33.00%	36.00%
Corporate stocks | MSCI
Pension and Other Postretirement Benefits
Performance percentage benchmark, percentage	67.00%	64.00%
Corporate stocks | Level 1
Pension and Other Postretirement Benefits
Total	$ 148	$ 176
Corporate stocks | Level 2
Pension and Other Postretirement Benefits
Total	4	5
Corporate stocks | NAV
Pension and Other Postretirement Benefits
Total	0	0
Corporate bonds
Pension and Other Postretirement Benefits
Total	1,084	1,057
Corporate bonds | Level 1
Pension and Other Postretirement Benefits
Total	$ 0	$ 0
Actual plan asset allocations, percentage	56.00%	57.00%
Corporate bonds | Level 2
Pension and Other Postretirement Benefits
Total	$ 1,084	$ 1,057
Corporate bonds | NAV
Pension and Other Postretirement Benefits
Total	0	0
Common/collective funds
Pension and Other Postretirement Benefits
Total	$ 652	$ 584
Common/collective funds | Standard and Poor's 500
Pension and Other Postretirement Benefits
Performance percentage benchmark, percentage	38.00%	41.00%
Common/collective funds | MSCI all country world index exUS
Pension and Other Postretirement Benefits
Performance percentage benchmark, percentage	38.00%	40.00%
Common/collective funds | Non-index U.S. equity fund
Pension and Other Postretirement Benefits
Performance percentage benchmark, percentage	19.00%	16.00%
Common/collective funds | Level 1
Pension and Other Postretirement Benefits
Total	$ 0	$ 0
Common/collective funds | Level 2
Pension and Other Postretirement Benefits
Total	0	0
Common/collective funds | NAV
Pension and Other Postretirement Benefits
Total	652	584
Partnerships/joint ventures
Pension and Other Postretirement Benefits
Total	$ 680	657
Actual plan asset allocations, percentage	16.00%
Partnerships/joint ventures | Level 1
Pension and Other Postretirement Benefits
Total	$ 0	0
Partnerships/joint ventures | Level 2
Pension and Other Postretirement Benefits
Total	0	0
Partnerships/joint ventures | NAV
Pension and Other Postretirement Benefits
Total	680	657
Other investment entities
Pension and Other Postretirement Benefits
Total	58	58
Other investment entities | Level 1
Pension and Other Postretirement Benefits
Total	0	0
Other investment entities | Level 2
Pension and Other Postretirement Benefits
Total	0	0
Other investment entities | NAV
Pension and Other Postretirement Benefits
Total	58	58
Registered investment companies
Pension and Other Postretirement Benefits
Total	380	365
Registered investment companies | Level 1
Pension and Other Postretirement Benefits
Total	238	212
Registered investment companies | Level 2
Pension and Other Postretirement Benefits
Total	0	0
Registered investment companies | NAV
Pension and Other Postretirement Benefits
Total	142	153
Interest-bearing cash
Pension and Other Postretirement Benefits
Total	14	10
Interest-bearing cash | Level 1
Pension and Other Postretirement Benefits
Total	14	10
Interest-bearing cash | Level 2
Pension and Other Postretirement Benefits
Total	0	0
Interest-bearing cash | NAV
Pension and Other Postretirement Benefits
Total	0	0
Other
Pension and Other Postretirement Benefits
Total	65	54
Other | Level 1
Pension and Other Postretirement Benefits
Total	0	0
Other | Level 2
Pension and Other Postretirement Benefits
Total	57	46
Other | NAV
Pension and Other Postretirement Benefits
Total	8	8
Collateralized mortgage obligations and other asset backed securities
Pension and Other Postretirement Benefits
Total	$ 77	$ 78
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	69.00%	74.00%
Asset backed securities including distressed mortgages
Pension and Other Postretirement Benefits
Actual plan asset allocations, percentage		17.00%
Broad range of financial assets in all global markets
Pension and Other Postretirement Benefits
Actual plan asset allocations, percentage	5.00%	5.00%
Fixed Income
Pension and Other Postretirement Benefits
Actual plan asset allocations, percentage	9.00%	0.00%
Domestic mortgage backed securities
Pension and Other Postretirement Benefits
Actual plan asset allocations, percentage	70.00%	68.00%
High yield debt securities
Pension and Other Postretirement Benefits
Actual plan asset allocations, percentage	30.00%	32.00%
Fixed Income Funds
Pension and Other Postretirement Benefits
Actual plan asset allocations, percentage	10.00%	13.00%
Equity Funds
Pension and Other Postretirement Benefits
Actual plan asset allocations, percentage	34.00%	28.00%
SCE
Pension and Other Postretirement Benefits
Net plan assets available for benefits	$ 3,416	$ 3,415	$ 3,275