OTHER CONTINGENCIES AND COMMITMENTS (Tax Matters) (Details) $ in Millions	9 Months Ended
Sep. 30, 2023 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Deductibility in question, repair costs for gas transmission and distribution lines	$ 850
Deductibility in question, customer bill credits	$ 400

Repair Costs, Gas Transmission and Distribution Lines, Amount of Deduction in Question

No definition available.

Name:	pcg_RepairCostsGasTransmissionAndDistributionLinesAmountOfDeductionInQuestion
Namespace Prefix:	pcg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration