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SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - WILDFIRE FUND (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jul. 31, 2019 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2019 | Sep. 30, 2019
Loss Contingencies [Line Items] |  |  |  |  |
Noncurrent portion of the Wildfire Fund asset |  | $ 269.0 | $ 303.0 |  |
SDG&E |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Initial liability cap |  | 1,300.0 |  |  |
Initial shareholder contributions |  |  |  |  | $ 322.5
Additional annual contributions, aggregate value |  | 129.0 |  |  |
Wildfire fund asset |  |  |  | $ 451.5 |
Annual contributions |  | $ 12.9 |  |  |
Amortization of wildfire fund asset |  | 15 years |  |  |
Current portion of Wildfire fund |  | $ 28.0 | 29.0 |  |
Noncurrent portion of the Wildfire Fund asset |  | 269.0 | 303.0 |  |
Wildfire fund obligations in current liabilities |  | 13.0 | 13.0 |  |
Noncurrent Wildfire Fund obligation |  | 42.0 | $ 53.0 |  |
Wildfire Fund |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Wildfire fund, threshold amount to seek payment | $ 1,000.0 |  |  |  |
Wildfire fund, threshold percentage of equity portion of electric transmission | 20.00% |  |  |  |
Liquidity fund, maximum borrowing capacity |  | 10,500.0 |  |  |
Initial shareholder contributions |  | 7,500.0 |  |  |
Additional annual contributions, aggregate value |  | $ 3,000.0 |  |  |
Period of annual contributions |  | 10 years |  |  |

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