v3.26.1
Fair Value Measurements - Schedule of Fair Value by Level within the Fair Value Hierarchy (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Liabilities at fair value    
Nuclear decommissioning trusts $ 4,457 $ 4,535
SCE    
Assets at fair value    
Derivative contracts, netting and collateral (1) 0
Derivative contracts, total 18 48
Money market funds and other 82 56
Nuclear decommissioning trusts 4,529 4,786
Total assets 4,629 4,890
Liabilities at fair value    
Derivative contracts, netting and collateral (35) (57)
Derivative contracts, total 0 0
Total liabilities 0 0
Net assets 4,629 4,890
Net assets , netting and collateral $ 34 $ 57
Percentage of equity investments located in the United States (as a percent) 70.00% 71.00%
Collateralized mortgage obligations and other asset backed securities $ 58 $ 60
Receivable (payables), net, related to investments (72) (251)
Nuclear decommissioning trusts 4,457 4,535
SCE | Level 1    
Assets at fair value    
Derivative contracts 0 0
Money market funds and other 15 34
Nuclear decommissioning trusts 2,890 3,081
Total assets 2,905 3,115
Liabilities at fair value    
Derivative contracts 0 0
Total liabilities 0 0
Net assets 2,905 3,115
SCE | Level 2    
Assets at fair value    
Derivative contracts 1 0
Money market funds and other 67 22
Nuclear decommissioning trusts 1,639 1,705
Total assets 1,707 1,727
Liabilities at fair value    
Derivative contracts 35 57
Total liabilities 35 57
Net assets 1,672 1,670
SCE | Level 3    
Assets at fair value    
Derivative contracts 18 48
Money market funds and other 0 0
Nuclear decommissioning trusts 0 0
Total assets 18 48
Liabilities at fair value    
Derivative contracts 0 0
Total liabilities 0 0
Net assets 18 48
SCE | Stocks    
Assets at fair value    
Nuclear decommissioning trusts 1,848 1,909
SCE | Stocks | Level 1    
Assets at fair value    
Nuclear decommissioning trusts 1,848 1,909
SCE | Stocks | Level 2    
Assets at fair value    
Nuclear decommissioning trusts 0 0
SCE | Stocks | Level 3    
Assets at fair value    
Nuclear decommissioning trusts 0 0
SCE | Fixed Income    
Assets at fair value    
Nuclear decommissioning trusts 2,475 2,646
SCE | Fixed Income | Level 1    
Assets at fair value    
Nuclear decommissioning trusts 874 981
SCE | Fixed Income | Level 2    
Assets at fair value    
Nuclear decommissioning trusts 1,601 1,665
SCE | Fixed Income | Level 3    
Assets at fair value    
Nuclear decommissioning trusts 0 0
SCE | Short-term investments, primarily cash equivalents    
Assets at fair value    
Nuclear decommissioning trusts 206 231
SCE | Short-term investments, primarily cash equivalents | Level 1    
Assets at fair value    
Nuclear decommissioning trusts 168 191
SCE | Short-term investments, primarily cash equivalents | Level 2    
Assets at fair value    
Nuclear decommissioning trusts 38 40
SCE | Short-term investments, primarily cash equivalents | Level 3    
Assets at fair value    
Nuclear decommissioning trusts $ 0 $ 0