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WILDFIRE-RELATED CONTINGENCIES (Insurance Receivable) (Details) $ in Millions | 9 Months Ended
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Sep. 30, 2023 USD ($)
Insurance Receivable [Roll Forward] |
Insurance Receivable, Beginning Balance | $ 794
Accrued insurance recoveries | 13
Reimbursements | (369)
Insurance Receivable, Ending Balance | 438
2022 Mosquito fire |
Insurance Receivable [Roll Forward] |
Insurance Receivable, Beginning Balance | 45
Accrued insurance recoveries | 13
Reimbursements | 0
Insurance Receivable, Ending Balance | 58
Insurance receivable | 58
2021 Dixie fire |
Insurance Receivable [Roll Forward] |
Insurance Receivable, Beginning Balance | 530
Accrued insurance recoveries | (3)
Reimbursements | (200)
Insurance Receivable, Ending Balance | 327
Insurance receivable | 527
2020 Zogg fire |
Insurance Receivable [Roll Forward] |
Insurance Receivable, Beginning Balance | 118
Accrued insurance recoveries | 3
Reimbursements | (68)
Insurance Receivable, Ending Balance | 53
Insurance receivable | 373
2019 Kincade fire |
Insurance Receivable [Roll Forward] |
Insurance Receivable, Beginning Balance | 101
Accrued insurance recoveries | 0
Reimbursements | (101)
Insurance Receivable, Ending Balance | 0
Insurance receivable | $ 430

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- 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_MosquitoFire2022Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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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_LossContingenciesByNatureOfContingencyAxis=pcg_KincadeFire2019Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |