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WILDFIRE-RELATED CONTINGENCIES (Regulatory Recovery) (Details) $ in Millions | 9 Months Ended
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Sep. 30, 2021 USD ($)
Loss Contingencies [Line Items] |
Probable of recovery | $ 1,156
FERC |
Loss Contingencies [Line Items] |
Probable of recovery | 98
WEMA |
Loss Contingencies [Line Items] |
Probable of recovery | $ 339

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- Definition Regulatory Asset, Probable of Recovery + References No definition available. + Details
Name: | pcg_RegulatoryAssetProbableOfRecovery
Namespace Prefix: | pcg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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- Details
Name: | pcg_RecoverySourceAxis=pcg_FERCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | pcg_RecoverySourceAxis=pcg_WEMAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |