EQUITY (Ownership Restrictions in PG&E Corporation’s Amended Articles) (Details)	Mar. 31, 2021
PG&E Corporation \| Minimum
Schedule Of Changes In Equity [Line Items]
Percentage of equity security ownership with board of director approval	4.75%

Sale of Stock, Percentage of Equity Security Ownership without Board of Director Approval

No definition available.

Name:	pcg_SaleOfStockPercentageOfEquitySecurityOwnershipWithBoardOfDirectorApproval
Namespace Prefix:	pcg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant