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Commitments And Contingencies (Gas Supply, Transportation And Storage) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Pacific Gas And Electric Company [Member]      
Long-term Purchase Commitment [Line Items]      
Cost of natural gas purchases $ 1,400us-gaap_CostOfNaturalGasPurchases
/ dei_LegalEntityAxis
= us-gaap_SubsidiaryOfCommonParentMember		 $ 1,600us-gaap_CostOfNaturalGasPurchases
/ dei_LegalEntityAxis
= us-gaap_SubsidiaryOfCommonParentMember		 $ 1,300us-gaap_CostOfNaturalGasPurchases
/ dei_LegalEntityAxis
= us-gaap_SubsidiaryOfCommonParentMember
Natural Gas [Member]      
Long-term Purchase Commitment [Line Items]      
Long Term Contract For Purchase Commitments Expiration Beginning Date 2015    
Long Term Contract For Purchase Commitments Expiration Ending Date 2026