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WILDFIRE-RELATED CONTINGENCIES (Insurance Receivable) (Details) - USD ($) $ in Millions |  | 6 Months Ended
--- | --- | ---
Jul. 14, 2022 | Jun. 30, 2022
Insurance Receivable [Roll Forward] |  |
Insurance Receivable, Beginning Balance |  | $ 1,247
Accrued insurance recoveries |  | 0
Reimbursements |  | (123)
Insurance Receivable, Ending Balance |  | 1,124
2021 Dixie fire |  |
Insurance Receivable [Roll Forward] |  |
Insurance Receivable, Beginning Balance |  | 563
Accrued insurance recoveries |  | (8)
Reimbursements |  | 0
Insurance Receivable, Ending Balance |  | 555
Insurance receivable |  | 555
2020 Zogg fire |  |
Insurance Receivable [Roll Forward] |  |
Insurance Receivable, Beginning Balance |  | 270
Accrued insurance recoveries |  | 8
Reimbursements |  | (98)
Insurance Receivable, Ending Balance |  | 180
Insurance receivable |  | 346
2020 Zogg fire | Subsequent Event |  |
Insurance Receivable [Roll Forward] |  |
Reimbursements | $ (19) |
2019 Kincade fire |  |
Insurance Receivable [Roll Forward] |  |
Insurance Receivable, Beginning Balance |  | 414
Accrued insurance recoveries |  | 0
Reimbursements |  | (25)
Insurance Receivable, Ending Balance |  | 389
Insurance receivable |  | $ 430

X
- Definition Increase (Decrease) in Estimated Insurance Recoveries + References No definition available. + Details
Name: | pcg_IncreaseDecreaseInEstimatedInsuranceRecoveries
Namespace Prefix: | pcg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Insurance Receivable [Roll Forward] + References No definition available. + Details
Name: | pcg_InsuranceReceivableRollForward
Namespace Prefix: | pcg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Insurance Settlements Receivable, Reimbursements + References No definition available. + Details
Name: | pcg_InsuranceSettlementsReceivableReimbursements
Namespace Prefix: | pcg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Liability Insurance Coverage, Insurance Receivable + References No definition available. + Details
Name: | pcg_LiabilityInsuranceCoverageInsuranceReceivable
Namespace Prefix: | pcg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Amount due in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy. + References No definition available. + Details
Name: | us-gaap_InsuranceSettlementsReceivable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=pcg_DixieFire2021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=pcg_ZoggFire2020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=pcg_KincadeFire2019Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |