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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2024 USD ($) numberOfSegment facility | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Public Utility, Property, Plant and Equipment [Line Items] |  |  |
Number of reportable segments | numberOfSegment | 1 |  |
Restricted cash and cash equivalents | $ 273 | $ 297 | $ 213
Self insurance contributions | 911 |  |
Liability insurance coverage, cash and cash equivalents | 8 |  |
Wildfire self-insurance asset | $ 905 | 0 |
Period for probable revenue recovery | 24 months |  |
Pacific Gas & Electric Co (Utility) |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |
Restricted cash and cash equivalents | $ 272 | 294 | $ 213
Wildfire self-insurance asset | $ 905 | $ 0 |
Composite depreciation rate | 3.61% | 3.56% | 3.74%
AFUDC debt recorded | $ 111 | $ 82 | $ 81
AFUDC equity recorded | $ 184 | $ 179 | $ 184
Pacific Gas & Electric Co (Utility) | Diablo Canyon |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |
Number of generation facilities | facility | 2 |  |

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