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DEBT (Narrative) (Details) - USD ($) $ in Millions |  |  |  |  | 3 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 20, 2022 | Apr. 04, 2022 | Mar. 31, 2022 | Feb. 18, 2022 | Mar. 31, 2022 | Mar. 31, 2021 | Feb. 28, 2022 | Dec. 31, 2021 | May 11, 2021 | Apr. 23, 2021 | Apr. 30, 2020
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Repayments of long term debt |  |  |  |  | $ 7 | $ 7 |  |  |  |  |
Customer Harm Threshold, post-emergence transaction, stress test cost |  |  |  |  |  |  | $ 7,500 |  |  |  |
Customer Harm Threshold, post-emergence transaction, recovery bonds issued |  |  |  |  |  |  | $ 7,500 |  |  |  |
Proceeds from the Sale of Long-term Debt |  |  |  | $ 1,000 |  |  |  |  |  |  |
Nothern California Wild Fire |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Customer Harm Threshold, post-emergence transaction, securitized |  |  |  |  |  |  |  |  | $ 7,500 | $ 7,500 | $ 7,500
Customer Harm Threshold, post-emergence transaction, debt retirement |  |  |  |  |  |  |  |  |  |  | $ 6,000
2020 Utility Term Loan Credit Agreement | Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Repayments of long term debt |  |  | $ 298 |  |  |  |  |  |  |  |
364-Day 2022A Tranche Loans | Pacific Gas & Electric Co (Utility) | Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Long-term debt, gross |  | $ 500 |  |  |  |  |  |  |  |  |
Credit spread adjustment |  | 0.10% |  |  |  |  |  |  |  |  |
364-Day 2022A Tranche Loans | Pacific Gas & Electric Co (Utility) | Subsequent Event | SOFR |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  | 1.25% |  |  |  |  |  |  |  |  |
364-Day 2022A Tranche Loans | Pacific Gas & Electric Co (Utility) | Subsequent Event | Base Rate |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  | 0.25% |  |  |  |  |  |  |  |  |
364-Day 2022B Tranche Loans | Pacific Gas & Electric Co (Utility) | Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Long-term debt, gross | $ 125 |  |  |  |  |  |  |  |  |  |
Credit spread adjustment | 0.10% |  |  |  |  |  |  |  |  |  |
364-Day 2022B Tranche Loans | Pacific Gas & Electric Co (Utility) | Subsequent Event | SOFR |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 1.25% |  |  |  |  |  |  |  |  |  |
364-Day 2022B Tranche Loans | Pacific Gas & Electric Co (Utility) | Subsequent Event | Base Rate |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 0.25% |  |  |  |  |  |  |  |  |  |
2-Year 2022B Tranche Loans | Pacific Gas & Electric Co (Utility) | Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Long-term debt, gross | $ 400 |  |  |  |  |  |  |  |  |  |
Credit spread adjustment | 0.10% |  |  |  |  |  |  |  |  |  |
2-Year 2022B Tranche Loans | Pacific Gas & Electric Co (Utility) | Subsequent Event | SOFR |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 1.25% |  |  |  |  |  |  |  |  |  |
2-Year 2022B Tranche Loans | Pacific Gas & Electric Co (Utility) | Subsequent Event | Base Rate |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 0.25% |  |  |  |  |  |  |  |  |  |
First Mortgage Bonds, Stated Maturity 2024 | Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  | $ 1,000 |  |  |  |  |  |  |
Interest rate |  |  |  | 3.25% |  |  |  |  |  |  |
First Mortgage Bonds, Stated Maturity 2029 | Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  | $ 400 |  |  |  |  |  |  |
Interest rate |  |  |  | 4.20% |  |  |  |  |  |  |
First Mortgage Bonds, Stated Maturity 2032 | Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  | $ 450 |  |  |  |  |  |  |
Interest rate |  |  |  | 4.40% |  |  |  |  |  |  |
First Mortgage Bonds, Stated Maturity 2052 | Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  | $ 550 |  |  |  |  |  |  |
Interest rate |  |  |  | 5.25% |  |  |  |  |  |  |
Receivables Securitization Program | Pacific Gas & Electric Co (Utility) |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Long-term debt, gross |  |  | $ 1,000 |  | $ 1,000 |  |  | $ 974 |  |  |
Receivables Securitization Program | Pacific Gas & Electric Co (Utility) | Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Increase (Decrease), Net | $ 500 |  |  |  |  |  |  |  |  |  |

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