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TAXES - Details of General Taxes (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
General Taxes |  |  |
KWH excise | $ 183 | $ 191 | $ 198
State gross receipts | 182 | 185 | 192
Real and personal property | 541 | 504 | 478
Social security and unemployment | 112 | 100 | 103
Other | 28 | 28 | 22
Total general taxes | $ 1,046 | $ 1,008 | $ 993

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