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Fair Value Measurements (Fair Value by Level) (Details) - USD ($) $ in Millions | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Assets at fair value |  |
Nuclear decommissioning trusts | $ 4,566 | $ 4,562
Southern California Edison |  |
Assets at fair value |  |
Nuclear decommissioning trusts | $ 4,566 | $ 4,562
Liabilities at fair value |  |
Percentage of equity investments located in the United States | 71.00% | 72.00%
Collateralized mortgage obligations and other asset backed securities | $ 71 | $ 46
Payables, net, related to investments | 140 | 111
Southern California Edison | Fair Value, Measurements, Recurring |  |
Assets at fair value |  |
Netting and Collateral | (6) | (15)
Derivative contracts, net | 34 | 87
Money market funds and other | 233 | 18
Nuclear decommissioning trusts | 4,706 | 4,673
Total assets | 4,973 | 4,778
Liabilities at fair value |  |
Netting and Collateral | (34) | (15)
Derivative contracts | 33 | 1
Total liabilities | 33 | 1
Total assets, netting and collateral | 28 | 0
Net assets | 4,940 | 4,777
Southern California Edison | Fair Value, Measurements, Recurring | Stocks |  |
Assets at fair value |  |
Nuclear decommissioning trusts | 1,710 | 1,765
Southern California Edison | Fair Value, Measurements, Recurring | Fixed Income |  |
Assets at fair value |  |
Nuclear decommissioning trusts | 2,682 | 2,762
Southern California Edison | Fair Value, Measurements, Recurring | Short-term investments, primarily cash equivalents |  |
Assets at fair value |  |
Nuclear decommissioning trusts | 314 | 146
Southern California Edison | Fair Value, Measurements, Recurring | Level 1 |  |
Assets at fair value |  |
Derivative contracts | 0 | 0
Money market funds and other | 219 | 4
Nuclear decommissioning trusts | 2,530 | 2,601
Total assets | 2,749 | 2,605
Liabilities at fair value |  |
Derivative contracts | 0 | 0
Total liabilities | 0 | 0
Net assets | 2,749 | 2,605
Southern California Edison | Fair Value, Measurements, Recurring | Level 1 | Stocks |  |
Assets at fair value |  |
Nuclear decommissioning trusts | 1,710 | 1,765
Southern California Edison | Fair Value, Measurements, Recurring | Level 1 | Fixed Income |  |
Assets at fair value |  |
Nuclear decommissioning trusts | 520 | 738
Southern California Edison | Fair Value, Measurements, Recurring | Level 1 | Short-term investments, primarily cash equivalents |  |
Assets at fair value |  |
Nuclear decommissioning trusts | 300 | 98
Southern California Edison | Fair Value, Measurements, Recurring | Level 2 |  |
Assets at fair value |  |
Derivative contracts | 4 | 19
Money market funds and other | 14 | 14
Nuclear decommissioning trusts | 2,176 | 2,072
Total assets | 2,194 | 2,105
Liabilities at fair value |  |
Derivative contracts | 65 | 11
Total liabilities | 65 | 11
Net assets | 2,129 | 2,094
Southern California Edison | Fair Value, Measurements, Recurring | Level 2 | Stocks |  |
Assets at fair value |  |
Nuclear decommissioning trusts | 0 | 0
Southern California Edison | Fair Value, Measurements, Recurring | Level 2 | Fixed Income |  |
Assets at fair value |  |
Nuclear decommissioning trusts | 2,162 | 2,024
Southern California Edison | Fair Value, Measurements, Recurring | Level 2 | Short-term investments, primarily cash equivalents |  |
Assets at fair value |  |
Nuclear decommissioning trusts | 14 | 48
Southern California Edison | Fair Value, Measurements, Recurring | Level 3 |  |
Assets at fair value |  |
Derivative contracts | 36 | 83
Money market funds and other | 0 | 0
Nuclear decommissioning trusts | 0 | 0
Total assets | 36 | 83
Liabilities at fair value |  |
Derivative contracts | 2 | 5
Total liabilities | 2 | 5
Net assets | 34 | 78
Southern California Edison | Fair Value, Measurements, Recurring | Level 3 | Stocks |  |
Assets at fair value |  |
Nuclear decommissioning trusts | 0 | 0
Southern California Edison | Fair Value, Measurements, Recurring | Level 3 | Fixed Income |  |
Assets at fair value |  |
Nuclear decommissioning trusts | 0 | 0
Southern California Edison | Fair Value, Measurements, Recurring | Level 3 | Short-term investments, primarily cash equivalents |  |
Assets at fair value |  |
Nuclear decommissioning trusts | $ 0 | $ 0

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