XML 116 R99.htm IDEA: XBRL DOCUMENT v3.20.4
Compensation and Benefit Plans (Plan Assets - Fair Value Levels) (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Pension Plans      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets $ 4,194 $ 3,777  
Fair value NAV 1,746 1,294  
Receivables and payables, net (23) (22)  
Net plan assets available for benefits 4,171 3,755 $ 3,321
Pension Plans | Level 1      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 797 833  
Pension Plans | Level 2      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 1,651 1,650  
Pension Plans | SCE      
Pension and Other Postretirement Benefits [Line Items]      
Net plan assets available for benefits 3,940 3,541 3,124
Pension Plans | U.S. government and agency securities      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 1,157 1,138  
Fair value NAV 0 0  
Pension Plans | U.S. government and agency securities | Level 1      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 151 146  
Pension Plans | U.S. government and agency securities | Level 2      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 1,006 992  
Pension Plans | Corporate stocks      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 575 554  
Fair value NAV $ 0 $ 0  
Pension Plans | Corporate stocks | Russell Indexes      
Pension and Other Postretirement Benefits [Line Items]      
Performance percentage benchmark, percentage 40.00% 40.00%  
Pension Plans | Corporate stocks | MSCI index      
Pension and Other Postretirement Benefits [Line Items]      
Performance percentage benchmark, percentage 60.00% 60.00%  
Pension Plans | Corporate stocks | Level 1      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets $ 570 $ 547  
Pension Plans | Corporate stocks | Level 2      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 5 7  
Pension Plans | Corporate bonds      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 601 572  
Fair value NAV 0 0  
Pension Plans | Corporate bonds | Level 1      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 0 0  
Pension Plans | Corporate bonds | Level 2      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 601 572  
Pension Plans | Common/collective funds      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 1,017 693  
Fair value NAV $ 1,017 $ 693  
Pension Plans | Common/collective funds | Standard And Poors 500 Index      
Pension and Other Postretirement Benefits [Line Items]      
Performance percentage benchmark, percentage 37.00% 35.00%  
Pension Plans | Common/collective funds | Russell 1000 index      
Pension and Other Postretirement Benefits [Line Items]      
Performance percentage benchmark, percentage 13.00% 17.00%  
Pension Plans | Common/collective funds | MSCI All Country World Index      
Pension and Other Postretirement Benefits [Line Items]      
Performance percentage benchmark, percentage 40.00% 28.00%  
Pension Plans | Common/collective funds | MSCI All Country World Index exUS      
Pension and Other Postretirement Benefits [Line Items]      
Performance percentage benchmark, percentage 8.00% 12.00%  
Pension Plans | Common/collective funds | Level 1      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets $ 0 $ 0  
Pension Plans | Common/collective funds | Level 2      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 0 0  
Pension Plans | Partnerships/joint ventures      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 569 471  
Fair value NAV $ 569 $ 471  
Pension Plans | Partnerships/joint ventures | Private equity      
Pension and Other Postretirement Benefits [Line Items]      
Actual plan asset allocations, percentage 49.00% 51.00%  
Pension Plans | Partnerships/joint ventures | ABS Including Distressed Mortgages and Commercial and Residential Loans      
Pension and Other Postretirement Benefits [Line Items]      
Actual plan asset allocations, percentage 23.00% 17.00%  
Pension Plans | Partnerships/joint ventures | Publicly Traded Fixed Income Securities      
Pension and Other Postretirement Benefits [Line Items]      
Actual plan asset allocations, percentage 19.00% 19.00%  
Pension Plans | Partnerships/joint ventures | Broad range of financial assets in all global markets      
Pension and Other Postretirement Benefits [Line Items]      
Actual plan asset allocations, percentage 4.00% 8.00%  
Pension Plans | Partnerships/joint ventures | Level 1      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets $ 0 $ 0  
Pension Plans | Partnerships/joint ventures | Level 2      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 0 0  
Pension Plans | Other investment entities      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 137 130  
Fair value NAV 137 130  
Pension Plans | Other investment entities | Level 1      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 0 0  
Pension Plans | Other investment entities | Level 2      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 0 0  
Pension Plans | Registered investment companies      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 92 133  
Fair value NAV 23 0  
Pension Plans | Registered investment companies | Level 1      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 69 133  
Pension Plans | Registered investment companies | Level 2      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 0 0  
Pension Plans | Interest-bearing cash      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 7 7  
Fair value NAV 0 0  
Pension Plans | Interest-bearing cash | Level 1      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 7 7  
Pension Plans | Interest-bearing cash | Level 2      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 0 0  
Pension Plans | Other      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 39 79  
Fair value NAV 0 0  
Pension Plans | Other | Level 1      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 0 0  
Pension Plans | Other | Level 2      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 39 79  
Pension Plans | Collateralized mortgage obligations and other asset backed securities      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 54 45  
PBOP      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 2,713 2,484  
Receivables and payables, net 4 (19)  
Net plan assets available for benefits 2,717 2,465 2,133
PBOP | Level 1      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 669 696  
PBOP | Level 2      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 1,270 1,068  
PBOP | NAV      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 774 720  
PBOP | SCE      
Pension and Other Postretirement Benefits [Line Items]      
Net plan assets available for benefits 2,717 2,464 $ 2,133
PBOP | U.S. government and agency securities      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 410 449  
PBOP | U.S. government and agency securities | Level 1      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 380 386  
PBOP | U.S. government and agency securities | Level 2      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 30 63  
PBOP | U.S. government and agency securities | NAV      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 0 0  
PBOP | Corporate stocks      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets $ 227 $ 244  
PBOP | Corporate stocks | Russell Indexes      
Pension and Other Postretirement Benefits [Line Items]      
Performance percentage benchmark, percentage 70.00% 68.00%  
PBOP | Corporate stocks | MSCI All Country World Index      
Pension and Other Postretirement Benefits [Line Items]      
Performance percentage benchmark, percentage 30.00% 32.00%  
PBOP | Corporate stocks | Level 1      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets $ 224 $ 242  
PBOP | Corporate stocks | Level 2      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 3 2  
PBOP | Corporate stocks | NAV      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 0 0  
PBOP | Corporate notes and bonds      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 1,079 885  
PBOP | Corporate notes and bonds | Level 1      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 0 0  
PBOP | Corporate notes and bonds | Level 2      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 1,079 885  
PBOP | Corporate notes and bonds | NAV      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 0 0  
PBOP | Common/collective funds      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets $ 693 $ 652  
PBOP | Common/collective funds | MSCI All Country World Index Investable Market Index      
Pension and Other Postretirement Benefits [Line Items]      
Actual plan asset allocations, percentage 70.00% 74.00%  
PBOP | Common/collective funds | Non-index U.S. equity fund      
Pension and Other Postretirement Benefits [Line Items]      
Actual plan asset allocations, percentage 22.00% 19.00%  
PBOP | Common/collective funds | Level 1      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets $ 0 $ 0  
PBOP | Common/collective funds | Level 2      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 0 0  
PBOP | Common/collective funds | NAV      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 693 652  
PBOP | Partnerships/joint ventures      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets $ 81 $ 68  
PBOP | Partnerships/joint ventures | Private equity      
Pension and Other Postretirement Benefits [Line Items]      
Actual plan asset allocations, percentage 46.00% 55.00%  
PBOP | Partnerships/joint ventures | Broad range of financial assets in all global markets      
Pension and Other Postretirement Benefits [Line Items]      
Actual plan asset allocations, percentage 18.00% 15.00%  
PBOP | Partnerships/joint ventures | Asset backed securities including distressed mortgages      
Pension and Other Postretirement Benefits [Line Items]      
Actual plan asset allocations, percentage 36.00% 28.00%  
PBOP | Partnerships/joint ventures | Level 1      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets $ 0 $ 0  
PBOP | Partnerships/joint ventures | Level 2      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 0 0  
PBOP | Partnerships/joint ventures | NAV      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 81 68  
PBOP | Registered investment companies      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 65 66  
PBOP | Registered investment companies | Level 1      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 65 66  
PBOP | Registered investment companies | Level 2      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 0 0  
PBOP | Registered investment companies | NAV      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 0 0  
PBOP | Interest-bearing cash      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 26 17  
PBOP | Interest-bearing cash | Level 1      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 0 0  
PBOP | Interest-bearing cash | Level 2      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 26 17  
PBOP | Interest-bearing cash | NAV      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 0 0  
PBOP | Other      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 132 103  
PBOP | Other | Municipal securities      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 61 66  
PBOP | Other | Level 1      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 0 2  
PBOP | Other | Level 2      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 132 101  
PBOP | Other | NAV      
Pension and Other Postretirement Benefits [Line Items]      
Fair value of plan assets 0 0  
PBOP | Collateralized mortgage obligations and other asset backed securities      
Pension and Other Postretirement Benefits [Line Items]      
Receivables and payables, net $ 170 $ 49