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BANKRUPTCY FILING (Chapter 11 Claims Process) (Details) claim in Thousands	Sep. 30, 2021 USD ($) claim	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
Proofs of claims | claim	100
Claims expected to be received	$ 143,000,000
Disputed claims and customer refunds	0	$ 242,000,000
Current regulatory liabilities expected to be refunded	$ 419,000,000
Subrogation Wildfire Trust and Fire Victim Trust
Debt Instrument [Line Items]
Proofs of claims | claim	80

X

- Definition

Claim Settlements Receivable

+ References

No definition available.

+ Details

Name:	pcg_ClaimSettlementsReceivable
Namespace Prefix:	pcg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

If the amount of accrued interest is greater than the amount of interest ultimately determined to be owed on the remaining net disputed claims, the Utility would refund to customers any excess interest collected.

+ References

No definition available.

+ Details

Name:	pcg_DisputedClaimsAndCustomerRefunds
Namespace Prefix:	pcg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Plan of Reorganization, Proofs of Claim

+ References

No definition available.

+ Details

Name:	pcg_PlanOfReorganizationProofsOfClaims
Namespace Prefix:	pcg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Regulatory Liability, Current, Expected To Be Refunded

+ References

No definition available.

+ Details

Name:	pcg_RegulatoryLiabilityCurrentExpectedToBeRefunded
Namespace Prefix:	pcg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- 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

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=pcg_SubrogationWildfireTrustAndFireVictimTrustMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: