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Income Taxes (Schedule Of Income Tax Provision) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Current, Federal $ (84)us-gaap_CurrentFederalTaxExpenseBenefit $ (218)us-gaap_CurrentFederalTaxExpenseBenefit $ (74)us-gaap_CurrentFederalTaxExpenseBenefit
Current, State (41)us-gaap_CurrentStateAndLocalTaxExpenseBenefit (26)us-gaap_CurrentStateAndLocalTaxExpenseBenefit 33us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Deferred, Federal 396us-gaap_DeferredFederalIncomeTaxExpenseBenefit 552us-gaap_DeferredFederalIncomeTaxExpenseBenefit 374us-gaap_DeferredFederalIncomeTaxExpenseBenefit
Deferred, State 78us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit (35)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit (92)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Tax credits (4)us-gaap_IncomeTaxCreditsAndAdjustments (5)us-gaap_IncomeTaxCreditsAndAdjustments (4)us-gaap_IncomeTaxCreditsAndAdjustments
Income Tax Provision 345us-gaap_IncomeTaxExpenseBenefit 268us-gaap_IncomeTaxExpenseBenefit 237us-gaap_IncomeTaxExpenseBenefit
Pacific Gas And Electric Company [Member]      
Current, Federal (84)us-gaap_CurrentFederalTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_SubsidiaryOfCommonParentMember
(222)us-gaap_CurrentFederalTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_SubsidiaryOfCommonParentMember
(52)us-gaap_CurrentFederalTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_SubsidiaryOfCommonParentMember
Current, State (29)us-gaap_CurrentStateAndLocalTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_SubsidiaryOfCommonParentMember
(23)us-gaap_CurrentStateAndLocalTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_SubsidiaryOfCommonParentMember
41us-gaap_CurrentStateAndLocalTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_SubsidiaryOfCommonParentMember
Deferred, Federal 426us-gaap_DeferredFederalIncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_SubsidiaryOfCommonParentMember
604us-gaap_DeferredFederalIncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_SubsidiaryOfCommonParentMember
404us-gaap_DeferredFederalIncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_SubsidiaryOfCommonParentMember
Deferred, State 75us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_SubsidiaryOfCommonParentMember
(28)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_SubsidiaryOfCommonParentMember
(91)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_SubsidiaryOfCommonParentMember
Tax credits (4)us-gaap_IncomeTaxCreditsAndAdjustments
/ dei_LegalEntityAxis
= us-gaap_SubsidiaryOfCommonParentMember
(5)us-gaap_IncomeTaxCreditsAndAdjustments
/ dei_LegalEntityAxis
= us-gaap_SubsidiaryOfCommonParentMember
(4)us-gaap_IncomeTaxCreditsAndAdjustments
/ dei_LegalEntityAxis
= us-gaap_SubsidiaryOfCommonParentMember
Income Tax Provision $ 384us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_SubsidiaryOfCommonParentMember
$ 326us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_SubsidiaryOfCommonParentMember
$ 298us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_SubsidiaryOfCommonParentMember