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Commitments And Contingencies (Environmental Remediation Liability Composed) (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Topock natural gas compressor station $ 291pcg_TopockNaturalGasCompressorStation [1] $ 264pcg_TopockNaturalGasCompressorStation [1]
Hinkley natural gas compressor station 158pcg_HinkleyNaturalGasCompressorStation [1] 190pcg_HinkleyNaturalGasCompressorStation [1]
Former manufactured gas plant sites owned by the Utility or third parties 257pcg_FormerManufacturedGasPlantSitesOwnedByUtilityOrThirdParties 184pcg_FormerManufacturedGasPlantSitesOwnedByUtilityOrThirdParties
Utility-owned generation facilities (other than for fossil fuel-fired), other facilities, and third-party disposal sites 150pcg_UtilityOwnedGenerationFacilitiesOtherThanForFossilFuelFiredOtherFacilitiesAndThirdPartyDisposalSites 160pcg_UtilityOwnedGenerationFacilitiesOtherThanForFossilFuelFiredOtherFacilitiesAndThirdPartyDisposalSites
Fossil fuel-fired generation facilities and sites 98pcg_FossilFuelFiredGenerationFacilitiesFormerlyOwnedByUtility 102pcg_FossilFuelFiredGenerationFacilitiesFormerlyOwnedByUtility
Total environmental remediation liability $ 954pcg_EnvironmentalRemediationLiability $ 900pcg_EnvironmentalRemediationLiability
[1] See Natural Gas Compressor Station Sites below.