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OTHER CONTINGENCIES AND COMMITMENTS (Interim Rate Relief Subject to Refund) (Details) - WMCE Interim Rate Relief - USD ($) $ in Millions | Sep. 21, 2021 | Jun. 30, 2022 | Oct. 23, 2020 | Sep. 30, 2020
--- | --- | --- | --- | ---
Loss Contingencies [Line Items] |  |  |  |
Expenses and capital expenditures, disallowed costs |  |  |  | $ 1,180
Expenses and capital expenditures, capital expenditures |  |  |  | 801
Cost recovery, increase to revenue requirement |  |  |  | $ 1,280
Interim rate relief |  |  | $ 447 |
Cost recovery, remaining revenue requirement |  |  | $ 868 |
Additional revenue requirement | $ 591 |  |  |
Additional amortization period | 24 months |  |  |
Fire hazard prevention memorandum account |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Cost recovery |  | $ 293 |  |
Fire risk and wildfire mitigation memorandum account |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Cost recovery |  | 740 |  |
Catastrophic event memorandum account |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Cost recovery |  | $ 251 |  |

X
- Definition Gain Contingency, Cost Recovery + References No definition available. + Details
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X
- Definition Loss Contingency, Capital Expenditures For Future Recovery + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Loss Contingency, Cost Recovery, Additional Revenue Requirement + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Loss Contingency, Cost Recovery, Increase To Revenue Requirement + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Loss Contingency, Cost Recovery, Remaining Revenue Requirement + References No definition available. + Details
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Namespace Prefix: | pcg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Loss Contingency, Expenses and Capital Expenditures, Capital Expenditures + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Loss Contingency, Expenses and Capital Expenditures, Disallowed Costs + References No definition available. + Details
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Namespace Prefix: | pcg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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Period Type: |

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- Details
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- Details
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Namespace Prefix: |
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Period Type: |