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OTHER CONTINGENCIES AND COMMITMENTS (Transmission Owner Rate) (Details) - USD ($) $ in Millions | Mar. 17, 2022 | Dec. 20, 2018 | Mar. 31, 2024
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Transmission Owner Rate Case Revenue |  |  |
Loss Contingencies [Line Items] |  |  |
Regulatory liabilities |  |  | $ 484
Regulatory assets |  |  | $ 233
Pacific Gas & Electric Co (Utility) | Electric |  |  |
Loss Contingencies [Line Items] |  |  |
Requested return on equity rate | 9.26% |  |
Requested return on equity rate, incentive component | 0.50% |  |
Actual return on equity rate | 9.76% |  |
Requested revenue rate |  | 98.85% |

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