EMPLOYEE BENEFIT PLANS (Schedule of Estimated Benefits Expected to Be Paid) (Details) $ in Millions	Dec. 31, 2022 USD ($)
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
2023	$ 907
2024	996
2025	1,028
2026	1,057
2027	1,082
Thereafter in the succeeding five years	5,702
PBOP Plans
Defined Benefit Plan Disclosure [Line Items]
2023	97
2024	98
2025	100
2026	94
2027	94
Thereafter in the succeeding five years	475
Federal Subsidy
Defined Benefit Plan Disclosure [Line Items]
2023	(4)
2024	(4)
2025	(4)
2026	(4)
2027	(4)
Thereafter in the succeeding five years	$ (4)

Defined Benefit Plan, Expected Future Benefit, Five Fiscal Years Thereafter

No definition available.

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

- Definition

Defined Benefit Plan, Expected Future Receipt, Year Five

+ References

No definition available.

+ Details

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

- Definition

Defined Benefit Plan, Expected Future Receipt, Year Four

+ References

No definition available.

+ Details

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

- Definition

Defined Benefit Plan, Expected Future Receipt, Year One

+ References

No definition available.

+ Details

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

- Definition

Defined Benefit Plan, Expected Future Receipt, Year Three

+ References

No definition available.

+ Details

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

- Definition

Defined Benefit Plan, Expected Future Receipt, Year Two

+ References

No definition available.

+ Details

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

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

- Definition

Amount of benefit for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following current fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

+ Details

Name:	us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of benefit for defined benefit plan expected to be paid in next fiscal year following current fiscal year.

+ References

+ Details

Name:	us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of benefit for defined benefit plan expected to be paid in fifth fiscal year following current fiscal year.

+ References

+ Details

Name:	us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of benefit for defined benefit plan expected to be paid in fourth fiscal year following current fiscal year.

+ References

+ Details

Name:	us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of benefit for defined benefit plan expected to be paid in third fiscal year following current fiscal year.

+ References

+ Details

Name:	us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of benefit for defined benefit plan expected to be paid in second fiscal year following current fiscal year.

+ References

+ Details

Name:	us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RetirementPlanTypeAxis=us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RetirementPlanTypeAxis=pcg_FederalSubsidyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: