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Must be disclosed if the amount (a) is included in the determination of segment assets reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in the determination of segment assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 28 -Subparagraph b falsefalseSegment reporting information, Expenditures for Property, Plant & Equipment16false0sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipmentsrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse1.001.00falsefalsefalsefalsefalse2truetruefalse1.001.00falsefalsefalsefalsefalse3truetruefalse1.001.00falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Expenditures for Property, Plant & Equipment17false0us-gaap_SegmentReportingInformationAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse3028300000030283000000falsefalsefalsefalsefalse2truefalsefalse2851200000028512000000falsefalsefalsefalsefalse3truefalsefalse2640000000026400000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of total assets attributed to the reportable segment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 falsefalseSegment reporting information, Assets18false0sre_SegmentReportingInformationPercentageOfAssetssrefalsenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse1.001.00falsefalsefalsefalsefalse2truetruefalse1.001.00falsefalsefalsefalsefalse3truetruefalse1.001.00falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Assets19true0sre_EntityWideDisclosureOnGeographicAreasLineItemssrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseEntity-Wide Disclosure On Geographic Areas [Line Items]20false0us-gaap_EntityWideDisclosureOnGeographicAreasLongLivedAssetsInIndividualForeignCountriesAmountus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse2282700000022827000000falsefalsefalsefalsefalse2truefalsefalse2260400000022604000000falsefalsefalsefalsefalse3truefalsefalse2011300000020113000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets located in foreign countries. An entity also may provide subtotals of geographic information about groups of countries; accordingly, this element also may be used to provide the amount of such long-lived assets for a group of countries.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 38 -Subparagraph b falsefalseEntity-Wide Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries, Amount21false0sre_EntityWideDisclosureOnGeographicAreasLongLivedAssetsInIndividualForeignCountriesPercentagesrefalsenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse1.001.00falsefalsefalsefalsefalse2truetruefalse1.001.00falsefalsefalsefalsefalse3truetruefalse1.001.00falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseEntity-Wide Disclosure On Geographic Areas, Long Lived Assets In Individual Foreign Countries, Percentage22false0us-gaap_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributedToIndividualForeignCountriesAmountus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse90030000009003000000falsefalsefalsefalsefalse2truefalsefalse81060000008106000000falsefalsefalsefalsefalse3truefalsefalse1075800000010758000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of revenue from external customers attributed to an individual foreign country from which revenue is material. 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Must be disclosed if the amount (a) is included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or lossReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph c falsefalseSegment reporting information, Interest Income31false0us-gaap_SegmentReportingInformationDepreciationDepletionAndAmortizationExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse381000000381000000falsefalsefalsefalsefalse2truefalsefalse329000000329000000falsefalsefalsefalsefalse3truefalsefalse298000000298000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of depreciation, depletion, and amortization expense for the reportable segment. Must be disclosed if the amount (a) is included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or lossReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph e falsefalseSegment reporting information, Depreciation and Amortization32false0sre_SegmentReportingInformationPercentageOfDepreciationAndAmortizationsrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.440.44falsefalsefalsefalsefalse2truetruefalse0.420.42falsefalsefalsefalsefalse3truetruefalse0.430.43falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Depreciation and Amortization33false0us-gaap_SegmentReportingInformationIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse173000000173000000falsefalsefalsefalsefalse2truefalsefalse177000000177000000falsefalsefalsefalsefalse3truefalsefalse161000000161000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of income tax expense or benefit attributed to the reportable segment. 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Must be disclosed if the amount (a) is included in the determination of segment assets reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in the determination of segment assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 28 -Subparagraph b falsefalseSegment reporting information, Expenditures for Property, Plant & Equipment38false0sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipmentsrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.590.59falsefalsefalsefalsefalse2truetruefalse0.500.50falsefalsefalsefalsefalse3truetruefalse0.430.43falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Expenditures for Property, Plant & Equipment39false0us-gaap_SegmentReportingInformationAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse1207700000012077000000falsefalsefalsefalsefalse2truefalsefalse1022900000010229000000falsefalsefalsefalsefalse3truefalsefalse90790000009079000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of total assets attributed to the reportable segment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 falsefalseSegment reporting information, Assets40false0sre_SegmentReportingInformationPercentageOfAssetssrefalsenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.400.40falsefalsefalsefalsefalse2truetruefalse0.360.36falsefalsefalsefalsefalse3truetruefalse0.340.34falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Assets42false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosuresegmentinformationdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse7falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : So Cal Gas Segment [Member] 1/1/2010 - 12/31/2010 USD ($) $FROM_Jan01_2010_TO_Dec31_2010_us-gaap_SegmentReportingInformationBySegmentAxis_SoCalGasSegmentMemberhttp://www.sec.gov/CIK0001032208duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseSo Cal Gas Segment [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldisre_SoCalGasSegmentMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$8falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : So Cal Gas Segment [Member] 1/1/2009 - 12/31/2009 USD ($) $FROM_Jan01_2009_TO_Dec31_2009_us-gaap_SegmentReportingInformationBySegmentAxis_SoCalGasSegmentMemberhttp://www.sec.gov/CIK0001032208duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseSo Cal Gas Segment [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldisre_SoCalGasSegmentMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$9falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : So Cal Gas Segment [Member] 1/1/2008 - 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All considered to be "operating revenue" for purposes of the taxonomy.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph a, b, c falsefalseSegment reporting information, Revenues46false0sre_SegmentReportingInformationPercentageOfRevenuessrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.420.42falsefalsefalsefalsefalse2truetruefalse0.410.41falsefalsefalsefalsefalse3truetruefalse0.440.44falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Total Consolidated Revenues47false0us-gaap_SegmentReportingInformationInterestExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse6600000066000000falsefalsefalsefalsefalse2truefalsefalse6800000068000000falsefalsefalsefalsefalse3truefalsefalse6200000062000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of interest expense for the reportable segment. Must be disclosed if the amount (a) is included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or lossReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph d falsefalseSegment reporting information, Interest Expense48false0us-gaap_SegmentReportingInformationInterestIncomeus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse10000001000000falsefalsefalsefalsefalse2truefalsefalse30000003000000falsefalsefalsefalsefalse3truefalsefalse1100000011000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of interest revenue for the reportable segment. Must be disclosed if the amount (a) is included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or lossReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph c falsefalseSegment reporting information, Interest Income49false0us-gaap_SegmentReportingInformationDepreciationDepletionAndAmortizationExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse309000000309000000falsefalsefalsefalsefalse2truefalsefalse293000000293000000falsefalsefalsefalsefalse3truefalsefalse280000000280000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of depreciation, depletion, and amortization expense for the reportable segment. Must be disclosed if the amount (a) is included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or lossReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph e falsefalseSegment reporting information, Depreciation and Amortization50false0sre_SegmentReportingInformationPercentageOfDepreciationAndAmortizationsrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.360.36falsefalsefalsefalsefalse2truetruefalse0.380.38falsefalsefalsefalsefalse3truetruefalse0.410.41falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Depreciation and Amortization51false0us-gaap_SegmentReportingInformationIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse176000000176000000falsefalsefalsefalsefalse2truefalsefalse144000000144000000falsefalsefalsefalsefalse3truefalsefalse140000000140000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of income tax expense or benefit attributed to the reportable segment. Must be disclosed if the amount (a) is included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or lossReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph h falsefalseSegment reporting information, Income Tax Expense (Benefit)52false0us-gaap_SegmentReportingInformationProfitLossus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse286000000286000000[1]falsefalsefalsefalsefalse2truefalsefalse273000000273000000[1]falsefalsefalsefalsefalse3truefalsefalse244000000244000000[1]falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of profit or loss recognized by the reportable segment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 falsefalseSegment reporting information, Earnings (Losses)53false0sre_SegmentReportingInformationPercentageOfEarningsLossessrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.390.39[1]falsefalsefalsefalsefalse2truetruefalse0.250.25[1]falsefalsefalsefalsefalse3truetruefalse0.220.22[1]falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Earnings (Losses)54true0us-gaap_SegmentReportingInformationAdditionalInformationAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseSegment Reporting Information, Additional Information [Abstract]55false0us-gaap_SegmentReportingInformationExpendituresForAdditionsToLongLivedAssetsus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse503000000503000000falsefalsefalsefalsefalse2truefalsefalse480000000480000000falsefalsefalsefalsefalse3truefalsefalse454000000454000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryTotal expenditures for additions to long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets of the reportable segment. Must be disclosed if the amount (a) is included in the determination of segment assets reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in the determination of segment assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 28 -Subparagraph b falsefalseSegment reporting information, Expenditures for Property, Plant & Equipment56false0sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipmentsrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.240.24falsefalsefalsefalsefalse2truetruefalse0.250.25falsefalsefalsefalsefalse3truetruefalse0.220.22falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Expenditures for Property, Plant & Equipment57false0us-gaap_SegmentReportingInformationAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse79860000007986000000falsefalsefalsefalsefalse2truefalsefalse72870000007287000000falsefalsefalsefalsefalse3truefalsefalse73510000007351000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of total assets attributed to the reportable segment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 falsefalseSegment reporting information, Assets58false0sre_SegmentReportingInformationPercentageOfAssetssrefalsenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.260.26falsefalsefalsefalsefalse2truetruefalse0.250.25falsefalsefalsefalsefalse3truetruefalse0.280.28falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Assets60false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosuresegmentinformationdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse10falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : Sempra Commodities Segment [Member] 1/1/2010 - 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Must be disclosed if the amount (a) is included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or lossReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph c falsefalseSegment reporting information, Interest Income67false0us-gaap_SegmentReportingInformationDepreciationDepletionAndAmortizationExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse60000006000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of depreciation, depletion, and amortization expense for the reportable segment. Must be disclosed if the amount (a) is included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or lossReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph e falsefalseSegment reporting information, Depreciation and Amortization68false0sre_SegmentReportingInformationPercentageOfDepreciationAndAmortizationsrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsetruefalse00falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalse3truetruefalse0.010.01falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Depreciation and Amortization69false0us-gaap_SegmentReportingInformationIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse-191000000-191000000falsefalsefalsefalsefalse2truefalsefalse103000000103000000falsefalsefalsefalsefalse3truefalsefalse202000000202000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of income tax expense or benefit attributed to the reportable segment. Must be disclosed if the amount (a) is included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or lossReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph h falsefalseSegment reporting information, Income Tax Expense (Benefit)70false0us-gaap_SegmentReportingInformationProfitLossus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse-155000000-155000000falsefalsefalsefalsefalse2truefalsefalse338000000338000000falsefalsefalsefalsefalse3truefalsefalse347000000347000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of profit or loss recognized by the reportable segment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 falsefalseSegment reporting information, Earnings (Losses)71false0sre_SegmentReportingInformationPercentageOfEarningsLossessrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse-0.21-0.21falsefalsefalsefalsefalse2truetruefalse0.300.30falsefalsefalsefalsefalse3truetruefalse0.310.31falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Earnings (Losses)72true0us-gaap_SegmentReportingInformationAdditionalInformationAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseSegment Reporting Information, Additional Information [Abstract]73false0us-gaap_SegmentReportingInformationExpendituresForAdditionsToLongLivedAssetsus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse2100000021000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryTotal expenditures for additions to long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets of the reportable segment. Must be disclosed if the amount (a) is included in the determination of segment assets reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in the determination of segment assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 28 -Subparagraph b falsefalseSegment reporting information, Expenditures for Property, Plant & Equipment74false0sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipmentsrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsetruefalse00falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalse3truetruefalse0.010.01falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Expenditures for Property, Plant & Equipment75false0us-gaap_SegmentReportingInformationAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse19810000001981000000falsefalsefalsefalsefalse2truefalsefalse22530000002253000000falsefalsefalsefalsefalse3truefalsefalse20920000002092000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of total assets attributed to the reportable segment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 falsefalseSegment reporting information, Assets76false0sre_SegmentReportingInformationPercentageOfAssetssrefalsenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.070.07falsefalsefalsefalsefalse2truetruefalse0.080.08falsefalsefalsefalsefalse3truetruefalse0.080.08falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Assets78false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosuresegmentinformationdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse13falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : Sempra Generation Segment [Member] 1/1/2010 - 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Must be disclosed if the amount (a) is included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or lossReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph e falsefalseSegment reporting information, Depreciation and Amortization86false0sre_SegmentReportingInformationPercentageOfDepreciationAndAmortizationsrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.070.07falsefalsefalsefalsefalse2truetruefalse0.080.08falsefalsefalsefalsefalse3truetruefalse0.080.08falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Depreciation and Amortization87false0us-gaap_SegmentReportingInformationIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse-7000000-7000000falsefalsefalsefalsefalse2truefalsefalse108000000108000000falsefalsefalsefalsefalse3truefalsefalse9900000099000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of income tax expense or benefit attributed to the reportable segment. 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Must be disclosed if the amount (a) is included in the determination of segment assets reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in the determination of segment assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 28 -Subparagraph b falsefalseSegment reporting information, Expenditures for Property, Plant & Equipment92false0sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipmentsrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.070.07falsefalsefalsefalsefalse2truetruefalse0.020.02falsefalsefalsefalsefalse3truetruefalse0.030.03falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Expenditures for Property, Plant & Equipment93false0us-gaap_SegmentReportingInformationAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse24010000002401000000falsefalsefalsefalsefalse2truefalsefalse20490000002049000000falsefalsefalsefalsefalse3truefalsefalse18600000001860000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of total assets attributed to the reportable segment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 falsefalseSegment reporting information, Assets94false0sre_SegmentReportingInformationPercentageOfAssetssrefalsenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.080.08falsefalsefalsefalsefalse2truetruefalse0.070.07falsefalsefalsefalsefalse3truetruefalse0.070.07falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Assets96false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosuresegmentinformationdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse16falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : Sempra Pipelines and Storage Segment [Member] 1/1/2010 - 12/31/2010 USD ($) $FROM_Jan01_2010_TO_Dec31_2010_us-gaap_SegmentReportingInformationBySegmentAxis_SempraPipelinesAndStorageSegmentMemberhttp://www.sec.gov/CIK0001032208duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseSempra Pipelines and Storage Segment [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldisre_SempraPipelinesAndStorageSegmentMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$17falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : Sempra Pipelines and Storage Segment [Member] 1/1/2009 - 12/31/2009 USD ($) $FROM_Jan01_2009_TO_Dec31_2009_us-gaap_SegmentReportingInformationBySegmentAxis_SempraPipelinesAndStorageSegmentMemberhttp://www.sec.gov/CIK0001032208duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseSempra Pipelines and Storage Segment [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldisre_SempraPipelinesAndStorageSegmentMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$18falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : Sempra Pipelines and Storage Segment [Member] 1/1/2008 - 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Must be disclosed if the amount (a) is included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or lossReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph c falsefalseSegment reporting information, Interest Income103false0us-gaap_SegmentReportingInformationDepreciationDepletionAndAmortizationExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse4400000044000000falsefalsefalsefalsefalse2truefalsefalse4500000045000000falsefalsefalsefalsefalse3truefalsefalse2000000020000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of depreciation, depletion, and amortization expense for the reportable segment. Must be disclosed if the amount (a) is included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or lossReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph e falsefalseSegment reporting information, Depreciation and Amortization104false0sre_SegmentReportingInformationPercentageOfDepreciationAndAmortizationsrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.050.05falsefalsefalsefalsefalse2truetruefalse0.060.06falsefalsefalsefalsefalse3truetruefalse0.030.03falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Depreciation and Amortization105false0us-gaap_SegmentReportingInformationIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse2600000026000000falsefalsefalsefalsefalse2truefalsefalse-20000000-20000000falsefalsefalsefalsefalse3truefalsefalse2300000023000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of income tax expense or benefit attributed to the reportable segment. Must be disclosed if the amount (a) is included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or lossReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph h falsefalseSegment reporting information, Income Tax Expense (Benefit)106false0us-gaap_SegmentReportingInformationProfitLossus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse159000000159000000falsefalsefalsefalsefalse2truefalsefalse101000000101000000falsefalsefalsefalsefalse3truefalsefalse106000000106000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of profit or loss recognized by the reportable segment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 falsefalseSegment reporting information, Earnings (Losses)107false0sre_SegmentReportingInformationPercentageOfEarningsLossessrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.210.21falsefalsefalsefalsefalse2truetruefalse0.090.09falsefalsefalsefalsefalse3truetruefalse0.090.09falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Earnings (Losses)108true0us-gaap_SegmentReportingInformationAdditionalInformationAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseSegment Reporting Information, Additional Information [Abstract]109false0us-gaap_SegmentReportingInformationExpendituresForAdditionsToLongLivedAssetsus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse192000000192000000falsefalsefalsefalsefalse2truefalsefalse200000000200000000falsefalsefalsefalsefalse3truefalsefalse264000000264000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryTotal expenditures for additions to long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets of the reportable segment. Must be disclosed if the amount (a) is included in the determination of segment assets reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in the determination of segment assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 28 -Subparagraph b falsefalseSegment reporting information, Expenditures for Property, Plant & Equipment110false0sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipmentsrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.090.09falsefalsefalsefalsefalse2truetruefalse0.110.11falsefalsefalsefalsefalse3truetruefalse0.130.13falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Expenditures for Property, Plant & Equipment111false0us-gaap_SegmentReportingInformationAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse51750000005175000000falsefalsefalsefalsefalse2truefalsefalse44850000004485000000falsefalsefalsefalsefalse3truefalsefalse40600000004060000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of total assets attributed to the reportable segment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 falsefalseSegment reporting information, Assets112false0sre_SegmentReportingInformationPercentageOfAssetssrefalsenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.170.17falsefalsefalsefalsefalse2truetruefalse0.160.16falsefalsefalsefalsefalse3truetruefalse0.150.15falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Assets114false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosuresegmentinformationdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse19falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : Sempra L N G Segment [Member] 1/1/2010 - 12/31/2010 USD ($) $FROM_Jan01_2010_TO_Dec31_2010_us-gaap_SegmentReportingInformationBySegmentAxis_SempraLNGSegmentMemberhttp://www.sec.gov/CIK0001032208duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseSempra L N G Segment [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldisre_SempraLNGSegmentMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$20falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : Sempra L N G Segment [Member] 1/1/2009 - 12/31/2009 USD ($) $FROM_Jan01_2009_TO_Dec31_2009_us-gaap_SegmentReportingInformationBySegmentAxis_SempraLNGSegmentMemberhttp://www.sec.gov/CIK0001032208duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseSempra L N G Segment [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldisre_SempraLNGSegmentMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$21falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : Sempra L N G Segment [Member] 1/1/2008 - 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Must be disclosed if the amount (a) is included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or lossReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph c falsefalseSegment reporting information, Interest Income121false0us-gaap_SegmentReportingInformationDepreciationDepletionAndAmortizationExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse5100000051000000falsefalsefalsefalsefalse2truefalsefalse3500000035000000falsefalsefalsefalsefalse3truefalsefalse1500000015000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of depreciation, depletion, and amortization expense for the reportable segment. Must be disclosed if the amount (a) is included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or lossReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph e falsefalseSegment reporting information, Depreciation and Amortization122false0sre_SegmentReportingInformationPercentageOfDepreciationAndAmortizationsrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.060.06falsefalsefalsefalsefalse2truetruefalse0.040.04falsefalsefalsefalsefalse3truetruefalse0.020.02falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Depreciation and Amortization123false0us-gaap_SegmentReportingInformationIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse2500000025000000falsefalsefalsefalsefalse2truefalsefalse-15000000-15000000falsefalsefalsefalsefalse3truefalsefalse-21000000-21000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of income tax expense or benefit attributed to the reportable segment. Must be disclosed if the amount (a) is included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or lossReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph h falsefalseSegment reporting information, Income Tax Expense (Benefit)124false0us-gaap_SegmentReportingInformationProfitLossus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse6800000068000000falsefalsefalsefalsefalse2truefalsefalse1600000016000000falsefalsefalsefalsefalse3truefalsefalse-46000000-46000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of profit or loss recognized by the reportable segment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 falsefalseSegment reporting information, Earnings (Losses)125false0sre_SegmentReportingInformationPercentageOfEarningsLossessrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.090.09falsefalsefalsefalsefalse2truetruefalse0.010.01falsefalsefalsefalsefalse3truetruefalse-0.04-0.04falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Earnings (Losses)126true0us-gaap_SegmentReportingInformationAdditionalInformationAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseSegment Reporting Information, Additional Information [Abstract]127false0us-gaap_SegmentReportingInformationExpendituresForAdditionsToLongLivedAssetsus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse1800000018000000falsefalsefalsefalsefalse2truefalsefalse235000000235000000falsefalsefalsefalsefalse3truefalsefalse365000000365000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryTotal expenditures for additions to long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets of the reportable segment. Must be disclosed if the amount (a) is included in the determination of segment assets reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in the determination of segment assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 28 -Subparagraph b falsefalseSegment reporting information, Expenditures for Property, Plant & Equipment128false0sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipmentsrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.010.01falsefalsefalsefalsefalse2truetruefalse0.120.12falsefalsefalsefalsefalse3truetruefalse0.170.17falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Expenditures for Property, Plant & Equipment129false0us-gaap_SegmentReportingInformationAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse23790000002379000000falsefalsefalsefalsefalse2truefalsefalse22770000002277000000falsefalsefalsefalsefalse3truefalsefalse20980000002098000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of total assets attributed to the reportable segment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 falsefalseSegment reporting information, Assets130false0sre_SegmentReportingInformationPercentageOfAssetssrefalsenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.080.08falsefalsefalsefalsefalse2truetruefalse0.080.08falsefalsefalsefalsefalse3truetruefalse0.080.08falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Assets132false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosuresegmentinformationdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse22falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : All Other Segments [Member] 1/1/2010 - 12/31/2010 USD ($) $FROM_Jan01_2010_TO_Dec31_2010_us-gaap_SegmentReportingInformationBySegmentAxis_AllOtherSegmentsMemberhttp://www.sec.gov/CIK0001032208duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseAll Other Segments [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldisre_AllOtherSegmentsMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$23falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : All Other Segments [Member] 1/1/2009 - 12/31/2009 USD ($) $FROM_Jan01_2009_TO_Dec31_2009_us-gaap_SegmentReportingInformationBySegmentAxis_AllOtherSegmentsMemberhttp://www.sec.gov/CIK0001032208duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseAll Other Segments [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldisre_AllOtherSegmentsMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$24falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : All Other Segments [Member] 1/1/2008 - 12/31/2008 USD ($) $FROM_Jan01_2008_TO_Dec31_2008_us-gaap_SegmentReportingInformationBySegmentAxis_AllOtherSegmentsMemberhttp://www.sec.gov/CIK0001032208duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseAll Other Segments [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldisre_AllOtherSegmentsMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseAll Other Segments [Member]134true0us-gaap_SegmentReportingInformationProfitLossAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseSegment Reporting Information, Profit (Loss) [Abstract]135false0us-gaap_SegmentReportingInformationInterestExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse306000000306000000falsefalsefalsefalsefalse2truefalsefalse279000000279000000falsefalsefalsefalsefalse3truefalsefalse149000000149000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of interest expense for the reportable segment. Must be disclosed if the amount (a) is included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or lossReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph d falsefalseSegment reporting information, Interest Expense136false0us-gaap_SegmentReportingInformationInterestIncomeus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse153000000153000000falsefalsefalsefalsefalse2truefalsefalse149000000149000000falsefalsefalsefalsefalse3truefalsefalse111000000111000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of interest revenue for the reportable segment. Must be disclosed if the amount (a) is included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or lossReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph c falsefalseSegment reporting information, Interest Income137false0us-gaap_SegmentReportingInformationDepreciationDepletionAndAmortizationExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse1700000017000000falsefalsefalsefalsefalse2truefalsefalse1500000015000000falsefalsefalsefalsefalse3truefalsefalse1200000012000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of depreciation, depletion, and amortization expense for the reportable segment. Must be disclosed if the amount (a) is included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or lossReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph e falsefalseSegment reporting information, Depreciation and Amortization138false0sre_SegmentReportingInformationPercentageOfDepreciationAndAmortizationsrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.020.02falsefalsefalsefalsefalse2truetruefalse0.020.02falsefalsefalsefalsefalse3truetruefalse0.020.02falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Depreciation and Amortization139false0us-gaap_SegmentReportingInformationIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse-100000000-100000000falsefalsefalsefalsefalse2truefalsefalse-75000000-75000000falsefalsefalsefalsefalse3truefalsefalse-166000000-166000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of income tax expense or benefit attributed to the reportable segment. Must be disclosed if the amount (a) is included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or lossReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph h falsefalseSegment reporting information, Income Tax Expense (Benefit)140false0us-gaap_SegmentReportingInformationProfitLossus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse-91000000-91000000falsefalsefalsefalsefalse2truefalsefalse-122000000-122000000falsefalsefalsefalsefalse3truefalsefalse-97000000-97000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of profit or loss recognized by the reportable segment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 falsefalseSegment reporting information, Earnings (Losses)141false0sre_SegmentReportingInformationPercentageOfEarningsLossessrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse-0.12-0.12falsefalsefalsefalsefalse2truetruefalse-0.11-0.11falsefalsefalsefalsefalse3truetruefalse-0.09-0.09falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Earnings (Losses)142true0us-gaap_SegmentReportingInformationAdditionalInformationAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseSegment Reporting Information, Additional Information [Abstract]143false0us-gaap_SegmentReportingInformationExpendituresForAdditionsToLongLivedAssetsus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse40000004000000falsefalsefalsefalsefalse2truefalsefalse40000004000000falsefalsefalsefalsefalse3truefalsefalse1400000014000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryTotal expenditures for additions to long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets of the reportable segment. Must be disclosed if the amount (a) is included in the determination of segment assets reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in the determination of segment assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 28 -Subparagraph b falsefalseSegment reporting information, Expenditures for Property, Plant & Equipment144false0sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipmentsrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsetruefalse00falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalse3truetruefalse0.010.01falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Expenditures for Property, Plant & Equipment145false0us-gaap_SegmentReportingInformationAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse612000000612000000falsefalsefalsefalsefalse2truefalsefalse597000000597000000falsefalsefalsefalsefalse3truefalsefalse747000000747000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of total assets attributed to the reportable segment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 falsefalseSegment reporting information, Assets146false0sre_SegmentReportingInformationPercentageOfAssetssrefalsenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.020.02falsefalsefalsefalsefalse2truetruefalse0.020.02falsefalsefalsefalsefalse3truetruefalse0.030.03falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseSegment reporting information, Percentage of Consolidated Assets148false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosuresegmentinformationdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse25falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : Intercompany Eliminations Segment [Member] 1/1/2010 - 12/31/2010 USD ($) $FROM_Jan01_2010_TO_Dec31_2010_us-gaap_SegmentReportingInformationBySegmentAxis_IntercompanyEliminationsSegmentMemberhttp://www.sec.gov/CIK0001032208duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseIntercompany Eliminations Segment [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldisre_IntercompanyEliminationsSegmentMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$26falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : Intercompany Eliminations Segment [Member] 1/1/2009 - 12/31/2009 USD ($) $FROM_Jan01_2009_TO_Dec31_2009_us-gaap_SegmentReportingInformationBySegmentAxis_IntercompanyEliminationsSegmentMemberhttp://www.sec.gov/CIK0001032208duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseIntercompany Eliminations Segment [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldisre_IntercompanyEliminationsSegmentMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$27falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : Intercompany Eliminations Segment [Member] 1/1/2008 - 12/31/2008 USD ($) $FROM_Jan01_2008_TO_Dec31_2008_us-gaap_SegmentReportingInformationBySegmentAxis_IntercompanyEliminationsSegmentMemberhttp://www.sec.gov/CIK0001032208duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseIntercompany Eliminations Segment [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldisre_IntercompanyEliminationsSegmentMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseIntercompany Eliminations Segment [Member]150true0us-gaap_SegmentReportingInformationProfitLossAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseSegment Reporting Information, Profit (Loss) [Abstract]151false0us-gaap_SegmentReportingInformationRevenueus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse30000003000000falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse-7000000-7000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of total revenue for the reportable segment, including revenue from external customers, transactions with other operating segments of the same entity, and (gross) interest revenue. All considered to be "operating revenue" for purposes of the taxonomy.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph a, b, c falsefalseSegment reporting information, Revenues152false0us-gaap_SegmentReportingInformationInterestExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse-174000000-174000000falsefalsefalsefalsefalse2truefalsefalse-161000000-161000000falsefalsefalsefalsefalse3truefalsefalse-117000000-117000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of interest expense for the reportable segment. Must be disclosed if the amount (a) is included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or lossReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph d falsefalseSegment reporting information, Interest Expense153false0us-gaap_SegmentReportingInformationInterestIncomeus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse-174000000-174000000falsefalsefalsefalsefalse2truefalsefalse-161000000-161000000falsefalsefalsefalsefalse3truefalsefalse-117000000-117000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of interest revenue for the reportable segment. 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An entity also may provide subtotals of geographic information about groups of countries.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 38 -Subparagraph a falsefalseEntity-Wide Disclosure on Geographic Areas, Revenue from External Customers Attributed to Individual Foreign Countries, Amount202false0sre_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributedToIndividualForeignCountriesPercentagesrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truetruefalse0.010.01falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseEntity-Wide Disclosure On Geographic Areas, Revenue From External Customers Attributed To Individual Foreign Countries, Percentage203false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosuresegmentinformationdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse44falsefalseUSDtruefalse{sre_EntityWideDisclosureOnGeographicAreasAxis} : Entity-Wide Disclosure On Geographic Areas, Canada [Member] 1/1/2008 - 12/31/2008 USD ($) $FROM_Jan01_2008_TO_Dec31_2008_sre_EntityWideDisclosureOnGeographicAreasAxis_EntityWideDisclosureOnGeographicAreasCanadaMemberhttp://www.sec.gov/CIK0001032208duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseEntity-Wide Disclosure On Geographic Areas, Canada [Member]sre_EntityWideDisclosureOnGeographicAreasAxisxbrldihttp://xbrl.org/2006/xbrldisre_EntityWideDisclosureOnGeographicAreasCanadaMembersre_EntityWideDisclosureOnGeographicAreasAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseEntity-Wide Disclosure On Geographic Areas, Canada [Member]207true0sre_EntityWideDisclosureOnGeographicAreasLineItemssrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseEntity-Wide Disclosure On Geographic Areas [Line Items]208false0us-gaap_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributedToIndividualForeignCountriesAmountus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse-12000000-12000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of revenue from external customers attributed to an individual foreign country from which revenue is material. An entity also may provide subtotals of geographic information about groups of countries.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 38 -Subparagraph a falsefalseEntity-Wide Disclosure on Geographic Areas, Revenue from External Customers Attributed to Individual Foreign Countries, Amount209false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosuresegmentinformationdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse45falsefalseUSDtruefalse{sre_EntityWideDisclosureOnGeographicAreasAxis} : Entity-Wide Disclosure On Geographic Areas, Asia [Member] 1/1/2008 - 12/31/2008 USD ($) $FROM_Jan01_2008_TO_Dec31_2008_sre_EntityWideDisclosureOnGeographicAreasAxis_EntityWideDisclosureOnGeographicAreasAsiaMemberhttp://www.sec.gov/CIK0001032208duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseEntity-Wide Disclosure On Geographic Areas, Asia [Member]sre_EntityWideDisclosureOnGeographicAreasAxisxbrldihttp://xbrl.org/2006/xbrldisre_EntityWideDisclosureOnGeographicAreasAsiaMembersre_EntityWideDisclosureOnGeographicAreasAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseEntity-Wide Disclosure On Geographic Areas, Asia [Member]213true0sre_EntityWideDisclosureOnGeographicAreasLineItemssrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseEntity-Wide Disclosure On Geographic Areas [Line Items]214false0us-gaap_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributedToIndividualForeignCountriesAmountus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse1600000016000000falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of revenue from external customers attributed to an individual foreign country from which revenue is material. 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