2.2.0.7 true SEGMENT INFORMATION (Details) (USD $) 041100 - Disclosure - SEGMENT INFORMATION (Details) true false In Millions false false 1 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ false 2 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ false 3 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ false 4 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ false 5 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ 2 Segment Reporting Information, Profit (Loss) [Abstract] 2 us-gaap_SegmentReportingInformationProfitLossAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 3 Segment reporting information, Revenues 2 us-gaap_SegmentReportingInformationRevenue us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 true true false false 2008000000 2008 false false false 2 true true false false 1689000000 1689 false false false 3 true true false false 4542000000 4542 false false false 4 true true false false 3797000000 3797 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 false 4 Segment reporting information, Percentage of Total Consolidated Revenues 2 sre_SegmentReportingInformationPercentageOfRevenues sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 100 100 false false false 2 false true false false 100 100 false false false 3 false true false false 100 100 false false false 4 false true false false 100 100 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 5 Segment reporting information, Interest Expense 2 us-gaap_SegmentReportingInformationInterestExpense us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 103000000 103 false false false 2 false true false false 79000000 79 false false false 3 false true false false 212000000 212 false false false 4 false true false false 161000000 161 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph d false 6 Segment reporting information, Interest Income 2 us-gaap_SegmentReportingInformationInterestIncome us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 4000000 4 false false false 2 false true false false 5000000 5 false false false 3 false true false false 8000000 8 false false false 4 false true false false 11000000 11 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph c false 7 Segment reporting information, Depreciation and Amortization 2 us-gaap_SegmentReportingInformationDepreciationDepletionAndAmortizationExpense us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 215000000 215 false false false 2 false true false false 189000000 189 false false false 3 false true false false 425000000 425 false false false 4 false true false false 372000000 372 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph e false 8 Segment reporting information, Percentage of Consolidated Depreciation and Amortization 2 sre_SegmentReportingInformationPercentageOfDepreciationAndAmortization sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 100 100 false false false 2 false true false false 100 100 false false false 3 false true false false 100 100 false false false 4 false true false false 100 100 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 9 Segment reporting information, Income Tax Expense (Benefit) 2 us-gaap_SegmentReportingInformationIncomeTaxExpenseBenefit us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 59000000 59 false false false 2 false true false false 90000000 90 false false false 3 false true false false 117000000 117 false false false 4 false true false false 199000000 199 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph h false 10 Segment reporting information, Equity Earnings (Losses) Recorded Before Tax 2 us-gaap_SegmentReportingInformationEquityInNetIncomeOfEquityMethodInvesteesOfSegment us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false -8000000 -8 false false false 2 false true false false 128000000 128 false false false 3 false true false false 7000000 7 false false false 4 false true false false 288000000 288 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount of income or loss recognized by the reportable segment for its share of an investee's net income or loss reported under the equity method of accounting. 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph g false 12 Segment reporting information, Earnings (Losses) 2 us-gaap_SegmentReportingInformationProfitLoss us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 222000000 222 false false false 2 false true false false 198000000 198 false false false 3 false true false false 328000000 328 false false false 4 false true false false 514000000 514 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 false 13 Segment reporting information, Percentage of Consolidated Earnings (Losses) 2 sre_SegmentReportingInformationPercentageOfEarningsLosses sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 100 100 false false false 2 false true false false 100 100 false false false 3 false true false false 100 100 false false false 4 false true false false 100 100 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 14 Segment Reporting Information, Additional Information [Abstract] 2 us-gaap_SegmentReportingInformationAdditionalInformationAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 15 Segment reporting information, Expenditures for Property, Plant & Equipment 2 us-gaap_SegmentReportingInformationExpendituresForAdditionsToLongLivedAssets us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 839000000 839 false false false 4 false true false false 938000000 938 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Total 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 false 16 Segment reporting information, Percentage of Consolidated Expenditures for Property, Plant & Equipment 2 sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipment sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 100 100 false false false 4 false true false false 100 100 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 17 Segment reporting information, Assets 2 us-gaap_SegmentReportingInformationAssets us-gaap true debit instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false 29086000000 29086 false false false 2 false false false false 0 0 false false false 3 false true false false 29086000000 29086 false false false 4 false false false false 0 0 false false false 5 false true false false 28512000000 28512 false false false xbrli:monetaryItemType monetary Amount 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 false 18 Segment reporting information, Percentage of Consolidated Assets 2 sre_SegmentReportingInformationPercentageOfAssets sre false na instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false 100 100 false false false 2 false false false false 0 0 false false false 3 false true false false 100 100 false false false 4 false false false false 0 0 false false false 5 false true false false 100 100 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 19 Segment reporting information, Investment in Equity Method Investees 2 us-gaap_SegmentReportingInformationInvestmentInEquityMethodInvestees us-gaap true debit instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false 4124000000 4124 false false false 2 false false false false 0 0 false false false 3 false true false false 4124000000 4124 false false false 4 false false false false 0 0 false false false 5 false true false false 4056000000 4056 false false false xbrli:monetaryItemType monetary Amount of investment in an equity method investee 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 a false 20 SDG&E Segment 0 na true na na No definition available. false true false false false false false false false false false http://www.sempra.com/role/disclosuresegmentinformationdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false false 6 USD true false false false SDG&E Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SDGESegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 7 USD true false false false SDG&E Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SDGESegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 8 USD true false false false SDG&E Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SDGESegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 9 USD true false false false SDG&E Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SDGESegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 10 USD true false false false SDG&E Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SDGESegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 21 Segment Reporting Information, Profit (Loss) [Abstract] 2 us-gaap_SegmentReportingInformationProfitLossAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 22 Segment reporting information, Revenues 2 us-gaap_SegmentReportingInformationRevenue us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 692000000 692 false false false 2 false true false false 631000000 631 false false false 3 false true false false 1434000000 1434 false false false 4 false true false false 1363000000 1363 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 false 23 Segment reporting information, Percentage of Total Consolidated Revenues 2 sre_SegmentReportingInformationPercentageOfRevenues sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 34 34 false false false 2 false true false false 37 37 false false false 3 false true false false 32 32 false false false 4 false true false false 36 36 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 24 Segment reporting information, Interest Expense 2 us-gaap_SegmentReportingInformationInterestExpense us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 31000000 31 false false false 2 false true false false 21000000 21 false false false 3 false true false false 62000000 62 false false false 4 false true false false 46000000 46 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph d false 26 Segment reporting information, Depreciation and Amortization 2 us-gaap_SegmentReportingInformationDepreciationDepletionAndAmortizationExpense us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 95000000 95 false false false 2 false true false false 81000000 81 false false false 3 false true false false 187000000 187 false false false 4 false true false false 158000000 158 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph e false 27 Segment reporting information, Percentage of Consolidated Depreciation and Amortization 2 sre_SegmentReportingInformationPercentageOfDepreciationAndAmortization sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 44 44 false false false 2 false true false false 43 43 false false false 3 false true false false 44 44 false false false 4 false true false false 42 42 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 28 Segment reporting information, Income Tax Expense (Benefit) 2 us-gaap_SegmentReportingInformationIncomeTaxExpenseBenefit us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 44000000 44 false false false 2 false true false false 28000000 28 false false false 3 false true false false 75000000 75 false false false 4 false true false false 88000000 88 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph h false 31 Segment reporting information, Earnings (Losses) 2 us-gaap_SegmentReportingInformationProfitLoss us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 75000000 75 [1] false false false 2 false true false false 70000000 70 [1] false false false 3 false true false false 158000000 158 [1] false false false 4 false true false false 169000000 169 [1] false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 false 32 Segment reporting information, Percentage of Consolidated Earnings (Losses) 2 sre_SegmentReportingInformationPercentageOfEarningsLosses sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 34 34 [1] false false false 2 false true false false 35 35 [1] false false false 3 false true false false 48 48 [1] false false false 4 false true false false 33 33 [1] false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 33 Segment Reporting Information, Additional Information [Abstract] 2 us-gaap_SegmentReportingInformationAdditionalInformationAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 34 Segment reporting information, Expenditures for Property, Plant & Equipment 2 us-gaap_SegmentReportingInformationExpendituresForAdditionsToLongLivedAssets us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 522000000 522 false false false 4 false true false false 443000000 443 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Total 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 false 35 Segment reporting information, Percentage of Consolidated Expenditures for Property, Plant & Equipment 2 sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipment sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 62 62 false false false 4 false true false false 47 47 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 36 Segment reporting information, Assets 2 us-gaap_SegmentReportingInformationAssets us-gaap true debit instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false 10727000000 10727 false false false 2 false false false false 0 0 false false false 3 false true false false 10727000000 10727 false false false 4 false false false false 0 0 false false false 5 false true false false 10229000000 10229 false false false xbrli:monetaryItemType monetary Amount 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 false 37 Segment reporting information, Percentage of Consolidated Assets 2 sre_SegmentReportingInformationPercentageOfAssets sre false na instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false 37 37 false false false 2 false false false false 0 0 false false false 3 false true false false 37 37 false false false 4 false false false false 0 0 false false false 5 false true false false 36 36 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 39 SoCalGas Segment 0 na true na na No definition available. false true false false false false false false false false false http://www.sempra.com/role/disclosuresegmentinformationdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false false 11 USD true false false false SoCalGas Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SoCalGasSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 12 USD true false false false SoCalGas Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SoCalGasSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 13 USD true false false false SoCalGas Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SoCalGasSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 14 USD true false false false SoCalGas Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SoCalGasSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 15 USD true false false false SoCalGas Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SoCalGasSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 40 Segment Reporting Information, Profit (Loss) [Abstract] 2 us-gaap_SegmentReportingInformationProfitLossAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 41 Segment reporting information, Revenues 2 us-gaap_SegmentReportingInformationRevenue us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 834000000 834 false false false 2 false true false false 694000000 694 false false false 3 false true false false 2016000000 2016 false false false 4 false true false false 1614000000 1614 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 false 42 Segment reporting information, Percentage of Total Consolidated Revenues 2 sre_SegmentReportingInformationPercentageOfRevenues sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 42 42 false false false 2 false true false false 41 41 false false false 3 false true false false 44 44 false false false 4 false true false false 42 42 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 43 Segment reporting information, Interest Expense 2 us-gaap_SegmentReportingInformationInterestExpense us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 16000000 16 false false false 2 false true false false 18000000 18 false false false 3 false true false false 33000000 33 false false false 4 false true false false 35000000 35 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph d false 44 Segment reporting information, Interest Income 2 us-gaap_SegmentReportingInformationInterestIncome us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 0 0 false false false 2 false true false false 1000000 1 false false false 3 false true false false 0 0 false false false 4 false true false false 2000000 2 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph c false 45 Segment reporting information, Depreciation and Amortization 2 us-gaap_SegmentReportingInformationDepreciationDepletionAndAmortizationExpense us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 77000000 77 false false false 2 false true false false 75000000 75 false false false 3 false true false false 152000000 152 false false false 4 false true false false 147000000 147 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph e false 46 Segment reporting information, Percentage of Consolidated Depreciation and Amortization 2 sre_SegmentReportingInformationPercentageOfDepreciationAndAmortization sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 36 36 false false false 2 false true false false 39 39 false false false 3 false true false false 36 36 false false false 4 false true false false 40 40 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 47 Segment reporting information, Income Tax Expense (Benefit) 2 us-gaap_SegmentReportingInformationIncomeTaxExpenseBenefit us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 34000000 34 false false false 2 false true false false 37000000 37 false false false 3 false true false false 90000000 90 false false false 4 false true false false 73000000 73 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph h false 50 Segment reporting information, Earnings (Losses) 2 us-gaap_SegmentReportingInformationProfitLoss us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 69000000 69 [1] false false false 2 false true false false 65000000 65 [1] false false false 3 false true false false 134000000 134 [1] false false false 4 false true false false 124000000 124 [1] false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 false 51 Segment reporting information, Percentage of Consolidated Earnings (Losses) 2 sre_SegmentReportingInformationPercentageOfEarningsLosses sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 31 31 [1] false false false 2 false true false false 33 33 [1] false false false 3 false true false false 41 41 [1] false false false 4 false true false false 24 24 [1] false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 52 Segment Reporting Information, Additional Information [Abstract] 2 us-gaap_SegmentReportingInformationAdditionalInformationAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 53 Segment reporting information, Expenditures for Property, Plant & Equipment 2 us-gaap_SegmentReportingInformationExpendituresForAdditionsToLongLivedAssets us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 216000000 216 false false false 4 false true false false 227000000 227 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Total 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 false 54 Segment reporting information, Percentage of Consolidated Expenditures for Property, Plant & Equipment 2 sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipment sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 26 26 false false false 4 false true false false 24 24 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 55 Segment reporting information, Assets 2 us-gaap_SegmentReportingInformationAssets us-gaap true debit instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false 7362000000 7362 false false false 2 false false false false 0 0 false false false 3 false true false false 7362000000 7362 false false false 4 false false false false 0 0 false false false 5 false true false false 7287000000 7287 false false false xbrli:monetaryItemType monetary Amount 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 false 56 Segment reporting information, Percentage of Consolidated Assets 2 sre_SegmentReportingInformationPercentageOfAssets sre false na instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false 25 25 false false false 2 false false false false 0 0 false false false 3 false true false false 25 25 false false false 4 false false false false 0 0 false false false 5 false true false false 25 25 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 58 Sempra Commodities Segment 0 na true na na No definition available. false true false false false false false false false false false http://www.sempra.com/role/disclosuresegmentinformationdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false false 16 USD true false false false Sempra Commodities Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SempraCommoditiesSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 17 USD true false false false Sempra Commodities Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SempraCommoditiesSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 18 USD true false false false Sempra Commodities Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SempraCommoditiesSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 19 USD true false false false Sempra Commodities Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SempraCommoditiesSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 20 USD true false false false Sempra Commodities Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SempraCommoditiesSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 59 Segment Reporting Information, Profit (Loss) [Abstract] 2 us-gaap_SegmentReportingInformationProfitLossAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 60 Segment reporting information, Revenues 2 us-gaap_SegmentReportingInformationRevenue us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 26000000 26 false false false 2 false true false false 13000000 13 false false false 3 false true false false 49000000 49 false false false 4 false true false false 26000000 26 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 false 61 Segment reporting information, Percentage of Total Consolidated Revenues 2 sre_SegmentReportingInformationPercentageOfRevenues sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 1 1 false false false 2 false true false false 1 1 false false false 3 false true false false 1 1 false false false 4 false true false false 1 1 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 62 Segment reporting information, Interest Expense 2 us-gaap_SegmentReportingInformationInterestExpense us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 0 0 false false false 2 false true false false 3000000 3 false false false 3 false true false false 1000000 1 false false false 4 false true false false 6000000 6 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph d false 66 Segment reporting information, Income Tax Expense (Benefit) 2 us-gaap_SegmentReportingInformationIncomeTaxExpenseBenefit us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false -12000000 -12 false false false 2 false true false false 37000000 37 false false false 3 false true false false -20000000 -20 false false false 4 false true false false 74000000 74 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph h false 67 Segment reporting information, Equity Earnings (Losses) Recorded Before Tax 2 us-gaap_SegmentReportingInformationEquityInNetIncomeOfEquityMethodInvesteesOfSegment us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false -16000000 -16 false false false 2 false true false false 126000000 126 false false false 3 false true false false -9000000 -9 false false false 4 false true false false 279000000 279 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount of income or loss recognized by the reportable segment for its share of an investee's net income or loss reported under the equity method of accounting. 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph g false 69 Segment reporting information, Earnings (Losses) 2 us-gaap_SegmentReportingInformationProfitLoss us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 0 0 false false false 2 false true false false 85000000 85 false false false 3 false true false false -5000000 -5 false false false 4 false true false false 199000000 199 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 false 70 Segment reporting information, Percentage of Consolidated Earnings (Losses) 2 sre_SegmentReportingInformationPercentageOfEarningsLosses sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 0 0 false false false 2 false true false false 43 43 false false false 3 false true false false -2 -2 false false false 4 false true false false 39 39 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 71 Segment Reporting Information, Additional Information [Abstract] 2 us-gaap_SegmentReportingInformationAdditionalInformationAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 74 Segment reporting information, Assets 2 us-gaap_SegmentReportingInformationAssets us-gaap true debit instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false 2141000000 2141 false false false 2 false false false false 0 0 false false false 3 false true false false 2141000000 2141 false false false 4 false false false false 0 0 false false false 5 false true false false 2255000000 2255 false false false xbrli:monetaryItemType monetary Amount 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 false 75 Segment reporting information, Percentage of Consolidated Assets 2 sre_SegmentReportingInformationPercentageOfAssets sre false na instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false 7 7 false false false 2 false false false false 0 0 false false false 3 false true false false 7 7 false false false 4 false false false false 0 0 false false false 5 false true false false 8 8 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 76 Segment reporting information, Investment in Equity Method Investees 2 us-gaap_SegmentReportingInformationInvestmentInEquityMethodInvestees us-gaap true debit instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false 1956000000 1956 false false false 2 false false false false 0 0 false false false 3 false true false false 1956000000 1956 false false false 4 false false false false 0 0 false false false 5 false true false false 2172000000 2172 false false false xbrli:monetaryItemType monetary Amount of investment in an equity method investee 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 a false 77 Sempra Generation Segment 0 na true na na No definition available. false true false false false false false false false false false http://www.sempra.com/role/disclosuresegmentinformationdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false false 21 USD true false false false Sempra Generation Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SempraGenerationSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 22 USD true false false false Sempra Generation Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SempraGenerationSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 23 USD true false false false Sempra Generation Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SempraGenerationSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 24 USD true false false false Sempra Generation Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SempraGenerationSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 25 USD true false false false Sempra Generation Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SempraGenerationSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 78 Segment Reporting Information, Profit (Loss) [Abstract] 2 us-gaap_SegmentReportingInformationProfitLossAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 79 Segment reporting information, Revenues 2 us-gaap_SegmentReportingInformationRevenue us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 242000000 242 false false false 2 false true false false 245000000 245 false false false 3 false true false false 537000000 537 false false false 4 false true false false 542000000 542 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 false 80 Segment reporting information, Percentage of Total Consolidated Revenues 2 sre_SegmentReportingInformationPercentageOfRevenues sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 12 12 false false false 2 false true false false 15 15 false false false 3 false true false false 12 12 false false false 4 false true false false 14 14 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 81 Segment reporting information, Interest Expense 2 us-gaap_SegmentReportingInformationInterestExpense us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 3000000 3 false false false 2 false true false false 4000000 4 false false false 3 false true false false 7000000 7 false false false 4 false true false false 8000000 8 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph d false 82 Segment reporting information, Interest Income 2 us-gaap_SegmentReportingInformationInterestIncome us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 3000000 3 false false false 2 false true false false 3000000 3 false false false 3 false true false false 5000000 5 false false false 4 false true false false 6000000 6 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph c false 83 Segment reporting information, Depreciation and Amortization 2 us-gaap_SegmentReportingInformationDepreciationDepletionAndAmortizationExpense us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 16000000 16 false false false 2 false true false false 15000000 15 false false false 3 false true false false 31000000 31 false false false 4 false true false false 29000000 29 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph e false 84 Segment reporting information, Percentage of Consolidated Depreciation and Amortization 2 sre_SegmentReportingInformationPercentageOfDepreciationAndAmortization sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 7 7 false false false 2 false true false false 8 8 false false false 3 false true false false 7 7 false false false 4 false true false false 8 8 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 85 Segment reporting information, Income Tax Expense (Benefit) 2 us-gaap_SegmentReportingInformationIncomeTaxExpenseBenefit us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 3000000 3 false false false 2 false true false false 34000000 34 false false false 3 false true false false -37000000 -37 false false false 4 false true false false 46000000 46 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph h false 86 Segment reporting information, Equity Earnings (Losses) Recorded Before Tax 2 us-gaap_SegmentReportingInformationEquityInNetIncomeOfEquityMethodInvesteesOfSegment us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false -1000000 -1 false false false 2 false true false false -6000000 -6 false false false 3 false true false false -1000000 -1 false false false 4 false true false false -6000000 -6 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount of income or loss recognized by the reportable segment for its share of an investee's net income or loss reported under the equity method of accounting. 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph g false 88 Segment reporting information, Earnings (Losses) 2 us-gaap_SegmentReportingInformationProfitLoss us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 48000000 48 false false false 2 false true false false 33000000 33 false false false 3 false true false false -5000000 -5 false false false 4 false true false false 76000000 76 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 false 89 Segment reporting information, Percentage of Consolidated Earnings (Losses) 2 sre_SegmentReportingInformationPercentageOfEarningsLosses sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 22 22 false false false 2 false true false false 17 17 false false false 3 false true false false -2 -2 false false false 4 false true false false 15 15 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 90 Segment Reporting Information, Additional Information [Abstract] 2 us-gaap_SegmentReportingInformationAdditionalInformationAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 91 Segment reporting information, Expenditures for Property, Plant & Equipment 2 us-gaap_SegmentReportingInformationExpendituresForAdditionsToLongLivedAssets us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 5000000 5 false false false 4 false true false false 8000000 8 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Total 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 false 92 Segment reporting information, Percentage of Consolidated Expenditures for Property, Plant & Equipment 2 sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipment sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 1 1 false false false 4 false true false false 1 1 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 93 Segment reporting information, Assets 2 us-gaap_SegmentReportingInformationAssets us-gaap true debit instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false 2281000000 2281 false false false 2 false false false false 0 0 false false false 3 false true false false 2281000000 2281 false false false 4 false false false false 0 0 false false false 5 false true false false 2048000000 2048 false false false xbrli:monetaryItemType monetary Amount 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 false 94 Segment reporting information, Percentage of Consolidated Assets 2 sre_SegmentReportingInformationPercentageOfAssets sre false na instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false 8 8 false false false 2 false false false false 0 0 false false false 3 false true false false 8 8 false false false 4 false false false false 0 0 false false false 5 false true false false 7 7 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 95 Segment reporting information, Investment in Equity Method Investees 2 us-gaap_SegmentReportingInformationInvestmentInEquityMethodInvestees us-gaap true debit instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false 428000000 428 false false false 2 false false false false 0 0 false false false 3 false true false false 428000000 428 false false false 4 false false false false 0 0 false false false 5 false true false false 434000000 434 false false false xbrli:monetaryItemType monetary Amount of investment in an equity method investee 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 a false 96 Sempra Pipelines & Storage Segment 0 na true na na No definition available. false true false false false false false false false false false http://www.sempra.com/role/disclosuresegmentinformationdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false false 26 USD true false false false Sempra Pipelines & Storage Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SempraPipelinesAndStorageSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 27 USD true false false false Sempra Pipelines & Storage Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SempraPipelinesAndStorageSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 28 USD true false false false Sempra Pipelines & Storage Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SempraPipelinesAndStorageSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 29 USD true false false false Sempra Pipelines & Storage Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SempraPipelinesAndStorageSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 30 USD true false false false Sempra Pipelines & Storage Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SempraPipelinesAndStorageSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 97 Segment Reporting Information, Profit (Loss) [Abstract] 2 us-gaap_SegmentReportingInformationProfitLossAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 98 Segment reporting information, Revenues 2 us-gaap_SegmentReportingInformationRevenue us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 75000000 75 false false false 2 false true false false 98000000 98 false false false 3 false true false false 185000000 185 false false false 4 false true false false 230000000 230 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 false 99 Segment reporting information, Percentage of Total Consolidated Revenues 2 sre_SegmentReportingInformationPercentageOfRevenues sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 4 4 false false false 2 false true false false 6 6 false false false 3 false true false false 4 4 false false false 4 false true false false 6 6 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 100 Segment reporting information, Interest Expense 2 us-gaap_SegmentReportingInformationInterestExpense us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 6000000 6 false false false 2 false true false false 7000000 7 false false false 3 false true false false 15000000 15 false false false 4 false true false false 14000000 14 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph d false 101 Segment reporting information, Interest Income 2 us-gaap_SegmentReportingInformationInterestIncome us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 4000000 4 false false false 2 false true false false 4000000 4 false false false 3 false true false false 8000000 8 false false false 4 false true false false 8000000 8 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph c false 102 Segment reporting information, Depreciation and Amortization 2 us-gaap_SegmentReportingInformationDepreciationDepletionAndAmortizationExpense us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 10000000 10 false false false 2 false true false false 9000000 9 false false false 3 false true false false 21000000 21 false false false 4 false true false false 19000000 19 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph e false 103 Segment reporting information, Percentage of Consolidated Depreciation and Amortization 2 sre_SegmentReportingInformationPercentageOfDepreciationAndAmortization sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 5 5 false false false 2 false true false false 5 5 false false false 3 false true false false 5 5 false false false 4 false true false false 5 5 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 104 Segment reporting information, Income Tax Expense (Benefit) 2 us-gaap_SegmentReportingInformationIncomeTaxExpenseBenefit us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 7000000 7 false false false 2 false true false false -29000000 -29 false false false 3 false true false false 13000000 13 false false false 4 false true false false -17000000 -17 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph h false 105 Segment reporting information, Equity Earnings (Losses) Recorded Before Tax 2 us-gaap_SegmentReportingInformationEquityInNetIncomeOfEquityMethodInvesteesOfSegment us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 12000000 12 false false false 2 false true false false 11000000 11 false false false 3 false true false false 22000000 22 false false false 4 false true false false 21000000 21 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount of income or loss recognized by the reportable segment for its share of an investee's net income or loss reported under the equity method of accounting. 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph g false 106 Segment reporting information, Equity Earnings (Losses) Recorded Net of Tax 2 sre_SegmentReportingInformationIncomeLossFromEquityMethodInvestmentsNetOfIncomeTax sre false credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 27000000 27 false false false 2 false true false false 23000000 23 false false false 3 false true false false 46000000 46 false false false 4 false true false false 39000000 39 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary No definition available. No authoritative reference available. false 107 Segment reporting information, Earnings (Losses) 2 us-gaap_SegmentReportingInformationProfitLoss us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 39000000 39 false false false 2 false true false false -27000000 -27 false false false 3 false true false false 77000000 77 false false false 4 false true false false 10000000 10 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 false 108 Segment reporting information, Percentage of Consolidated Earnings (Losses) 2 sre_SegmentReportingInformationPercentageOfEarningsLosses sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 17 17 false false false 2 false true false false -14 -14 false false false 3 false true false false 24 24 false false false 4 false true false false 2 2 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 109 Segment Reporting Information, Additional Information [Abstract] 2 us-gaap_SegmentReportingInformationAdditionalInformationAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 110 Segment reporting information, Expenditures for Property, Plant & Equipment 2 us-gaap_SegmentReportingInformationExpendituresForAdditionsToLongLivedAssets us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 90000000 90 false false false 4 false true false false 116000000 116 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Total 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 false 111 Segment reporting information, Percentage of Consolidated Expenditures for Property, Plant & Equipment 2 sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipment sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 11 11 false false false 4 false true false false 13 13 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 112 Segment reporting information, Assets 2 us-gaap_SegmentReportingInformationAssets us-gaap true debit instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false 4948000000 4948 false false false 2 false false false false 0 0 false false false 3 false true false false 4948000000 4948 false false false 4 false false false false 0 0 false false false 5 false true false false 4485000000 4485 false false false xbrli:monetaryItemType monetary Amount 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 false 113 Segment reporting information, Percentage of Consolidated Assets 2 sre_SegmentReportingInformationPercentageOfAssets sre false na instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false 17 17 false false false 2 false false false false 0 0 false false false 3 false true false false 17 17 false false false 4 false false false false 0 0 false false false 5 false true false false 16 16 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 114 Segment reporting information, Investment in Equity Method Investees 2 us-gaap_SegmentReportingInformationInvestmentInEquityMethodInvestees us-gaap true debit instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false 1721000000 1721 false false false 2 false false false false 0 0 false false false 3 false true false false 1721000000 1721 false false false 4 false false false false 0 0 false false false 5 false true false false 1429000000 1429 false false false xbrli:monetaryItemType monetary Amount of investment in an equity method investee 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 a false 115 Sempra LNG Segment 0 na true na na No definition available. false true false false false false false false false false false http://www.sempra.com/role/disclosuresegmentinformationdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false false 31 USD true false false false Sempra LNG Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SempraLNGSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 32 USD true false false false Sempra LNG Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SempraLNGSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 33 USD true false false false Sempra LNG Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SempraLNGSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 34 USD true false false false Sempra LNG Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SempraLNGSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 35 USD true false false false Sempra LNG Segment us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_SempraLNGSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 116 Segment Reporting Information, Profit (Loss) [Abstract] 2 us-gaap_SegmentReportingInformationProfitLossAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 117 Segment reporting information, Revenues 2 us-gaap_SegmentReportingInformationRevenue us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 166000000 166 false false false 2 false true false false 25000000 25 false false false 3 false true false false 371000000 371 false false false 4 false true false false 57000000 57 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 false 118 Segment reporting information, Percentage of Total Consolidated Revenues 2 sre_SegmentReportingInformationPercentageOfRevenues sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 8 8 false false false 2 false true false false 1 1 false false false 3 false true false false 8 8 false false false 4 false true false false 2 2 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 119 Segment reporting information, Interest Expense 2 us-gaap_SegmentReportingInformationInterestExpense us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 12000000 12 false false false 2 false true false false 2000000 2 false false false 3 false true false false 24000000 24 false false false 4 false true false false 4000000 4 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph d false 121 Segment reporting information, Depreciation and Amortization 2 us-gaap_SegmentReportingInformationDepreciationDepletionAndAmortizationExpense us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 13000000 13 false false false 2 false true false false 7000000 7 false false false 3 false true false false 25000000 25 false false false 4 false true false false 13000000 13 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph e false 122 Segment reporting information, Percentage of Consolidated Depreciation and Amortization 2 sre_SegmentReportingInformationPercentageOfDepreciationAndAmortization sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 6 6 false false false 2 false true false false 4 4 false false false 3 false true false false 6 6 false false false 4 false true false false 3 3 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 123 Segment reporting information, Income Tax Expense (Benefit) 2 us-gaap_SegmentReportingInformationIncomeTaxExpenseBenefit us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 4000000 4 false false false 2 false true false false -10000000 -10 false false false 3 false true false false 16000000 16 false false false 4 false true false false -22000000 -22 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph h false 126 Segment reporting information, Earnings (Losses) 2 us-gaap_SegmentReportingInformationProfitLoss us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 13000000 13 false false false 2 false true false false -12000000 -12 false false false 3 false true false false 45000000 45 false false false 4 false true false false -19000000 -19 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 false 127 Segment reporting information, Percentage of Consolidated Earnings (Losses) 2 sre_SegmentReportingInformationPercentageOfEarningsLosses sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 6 6 false false false 2 false true false false -6 -6 false false false 3 false true false false 14 14 false false false 4 false true false false -4 -4 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 128 Segment Reporting Information, Additional Information [Abstract] 2 us-gaap_SegmentReportingInformationAdditionalInformationAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 129 Segment reporting information, Expenditures for Property, Plant & Equipment 2 us-gaap_SegmentReportingInformationExpendituresForAdditionsToLongLivedAssets us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 4000000 4 false false false 4 false true false false 142000000 142 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Total 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 false 130 Segment reporting information, Percentage of Consolidated Expenditures for Property, Plant & Equipment 2 sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipment sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 0 0 false false false 4 false true false false 15 15 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 131 Segment reporting information, Assets 2 us-gaap_SegmentReportingInformationAssets us-gaap true debit instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false 2292000000 2292 false false false 2 false false false false 0 0 false false false 3 false true false false 2292000000 2292 false false false 4 false false false false 0 0 false false false 5 false true false false 2277000000 2277 false false false xbrli:monetaryItemType monetary Amount 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 false 132 Segment reporting information, Percentage of Consolidated Assets 2 sre_SegmentReportingInformationPercentageOfAssets sre false na instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false 8 8 false false false 2 false false false false 0 0 false false false 3 false true false false 8 8 false false false 4 false false false false 0 0 false false false 5 false true false false 8 8 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 134 All Other Segments 0 na true na na No definition available. false true false false false false false false false false false http://www.sempra.com/role/disclosuresegmentinformationdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false false 36 USD true false false false All Other Segments us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_AllOtherSegmentsMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 37 USD true false false false All Other Segments us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_AllOtherSegmentsMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 38 USD true false false false All Other Segments us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_AllOtherSegmentsMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 39 USD true false false false All Other Segments us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_AllOtherSegmentsMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 40 USD true false false false All Other Segments us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_AllOtherSegmentsMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 135 Segment Reporting Information, Profit (Loss) [Abstract] 2 us-gaap_SegmentReportingInformationProfitLossAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 138 Segment reporting information, Interest Expense 2 us-gaap_SegmentReportingInformationInterestExpense us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 79000000 79 false false false 2 false true false false 61000000 61 false false false 3 false true false false 166000000 166 false false false 4 false true false false 120000000 120 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph d false 139 Segment reporting information, Interest Income 2 us-gaap_SegmentReportingInformationInterestIncome us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 41000000 41 false false false 2 false true false false 34000000 34 false false false 3 false true false false 91000000 91 false false false 4 false true false false 67000000 67 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph c false 140 Segment reporting information, Depreciation and Amortization 2 us-gaap_SegmentReportingInformationDepreciationDepletionAndAmortizationExpense us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 4000000 4 false false false 2 false true false false 2000000 2 false false false 3 false true false false 9000000 9 false false false 4 false true false false 6000000 6 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph e false 141 Segment reporting information, Percentage of Consolidated Depreciation and Amortization 2 sre_SegmentReportingInformationPercentageOfDepreciationAndAmortization sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 2 2 false false false 2 false true false false 1 1 false false false 3 false true false false 2 2 false false false 4 false true false false 2 2 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 142 Segment reporting information, Income Tax Expense (Benefit) 2 us-gaap_SegmentReportingInformationIncomeTaxExpenseBenefit us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false -21000000 -21 false false false 2 false true false false -7000000 -7 false false false 3 false true false false -20000000 -20 false false false 4 false true false false -43000000 -43 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph h false 143 Segment reporting information, Equity Earnings (Losses) Recorded Before Tax 2 us-gaap_SegmentReportingInformationEquityInNetIncomeOfEquityMethodInvesteesOfSegment us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false -3000000 -3 false false false 2 false true false false -3000000 -3 false false false 3 false true false false -5000000 -5 false false false 4 false true false false -6000000 -6 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount of income or loss recognized by the reportable segment for its share of an investee's net income or loss reported under the equity method of accounting. 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph g false 145 Segment reporting information, Earnings (Losses) 2 us-gaap_SegmentReportingInformationProfitLoss us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false -22000000 -22 false false false 2 false true false false -16000000 -16 false false false 3 false true false false -76000000 -76 false false false 4 false true false false -45000000 -45 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 false 146 Segment reporting information, Percentage of Consolidated Earnings (Losses) 2 sre_SegmentReportingInformationPercentageOfEarningsLosses sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false -10 -10 false false false 2 false true false false -8 -8 false false false 3 false true false false -23 -23 false false false 4 false true false false -9 -9 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 147 Segment Reporting Information, Additional Information [Abstract] 2 us-gaap_SegmentReportingInformationAdditionalInformationAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 148 Segment reporting information, Expenditures for Property, Plant & Equipment 2 us-gaap_SegmentReportingInformationExpendituresForAdditionsToLongLivedAssets us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 2000000 2 false false false 4 false true false false 2000000 2 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Total 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 false 149 Segment reporting information, Percentage of Consolidated Expenditures for Property, Plant & Equipment 2 sre_SegmentReportingInformationPercentageOfExpendituresForPropertyPlantAndEquipment sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 0 0 false false false 4 false true false false 0 0 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 150 Segment reporting information, Assets 2 us-gaap_SegmentReportingInformationAssets us-gaap true debit instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false 618000000 618 false false false 2 false false false false 0 0 false false false 3 false true false false 618000000 618 false false false 4 false false false false 0 0 false false false 5 false true false false 596000000 596 false false false xbrli:monetaryItemType monetary Amount 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 false 151 Segment reporting information, Percentage of Consolidated Assets 2 sre_SegmentReportingInformationPercentageOfAssets sre false na instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false 2 2 false false false 2 false false false false 0 0 false false false 3 false true false false 2 2 false false false 4 false false false false 0 0 false false false 5 false true false false 2 2 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 152 Segment reporting information, Investment in Equity Method Investees 2 us-gaap_SegmentReportingInformationInvestmentInEquityMethodInvestees us-gaap true debit instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false 19000000 19 false false false 2 false false false false 0 0 false false false 3 false true false false 19000000 19 false false false 4 false false false false 0 0 false false false 5 false true false false 21000000 21 false false false xbrli:monetaryItemType monetary Amount of investment in an equity method investee 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 a false 153 Intercompany Eliminations 0 na true na na No definition available. false true false false false false false false false false false http://www.sempra.com/role/disclosuresegmentinformationdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false false 41 USD true false false false Intercompany Eliminations us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_IntercompanyEliminationsSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 42 USD true false false false Intercompany Eliminations us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_IntercompanyEliminationsSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 43 USD true false false false Intercompany Eliminations us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_IntercompanyEliminationsSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 44 USD true false false false Intercompany Eliminations us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_IntercompanyEliminationsSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 154 Segment Reporting Information, Profit (Loss) [Abstract] 2 us-gaap_SegmentReportingInformationProfitLossAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 155 Segment reporting information, Revenues 2 us-gaap_SegmentReportingInformationRevenue us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false -2000000 -2 false false false 2 false true false false 0 0 false false false 3 false true false false 1000000 1 false false false 4 false true false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 false 156 Segment reporting information, Percentage of Total Consolidated Revenues 2 sre_SegmentReportingInformationPercentageOfRevenues sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 0 0 false false false 2 false true false false 0 0 false false false 3 false true false false 0 0 false false false 4 false true false false 0 0 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 157 Segment reporting information, Interest Expense 2 us-gaap_SegmentReportingInformationInterestExpense us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false -44000000 -44 false false false 2 false true false false -37000000 -37 false false false 3 false true false false -96000000 -96 false false false 4 false true false false -72000000 -72 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph d false 158 Segment reporting information, Interest Income 2 us-gaap_SegmentReportingInformationInterestIncome us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false -44000000 -44 false false false 2 false true false false -37000000 -37 false false false 3 false true false false -96000000 -96 false false false 4 false true false false -72000000 -72 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 loss Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph c false 172 Intersegment Revenues 0 na true na na No definition available. false true false false false false false false false false false http://www.sempra.com/role/disclosuresegmentinformationdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false false 45 USD true false false false Intersegment Revenues us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_IntersegmentRevenuesSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 46 USD true false false false Intersegment Revenues us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_IntersegmentRevenuesSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 47 USD true false false false Intersegment Revenues us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_IntersegmentRevenuesSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 48 USD true false false false Intersegment Revenues us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_IntersegmentRevenuesSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 173 Segment Reporting Information, Profit (Loss) [Abstract] 2 us-gaap_SegmentReportingInformationProfitLossAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 174 Segment reporting information, Revenues 2 us-gaap_SegmentReportingInformationRevenue us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false -25000000 -25 false false false 2 false true false false -17000000 -17 false false false 3 false true false false -51000000 -51 false false false 4 false true false false -35000000 -35 false false false 5 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount 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 false 175 Segment reporting information, Percentage of Total Consolidated Revenues 2 sre_SegmentReportingInformationPercentageOfRevenues sre false na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false -1 -1 false false false 2 false true false false -1 -1 false false false 3 false true false false -1 -1 false false false 4 false true false false -1 -1 false false false 5 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 191 Intersegment Receivables 0 na true na na No definition available. false true false false false false false false false false false http://www.sempra.com/role/disclosuresegmentinformationdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false false 49 USD true false false false Intersegment Receivables us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_IntersegmentReceivablesSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 50 USD true false false false Intersegment Receivables us-gaap_SegmentReportingInformationBySegmentAxis xbrldi http://xbrl.org/2006/xbrldi sre_IntersegmentReceivablesSegmentMember us-gaap_SegmentReportingInformationBySegmentAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 204 Segment Reporting Information, Additional Information [Abstract] 2 us-gaap_SegmentReportingInformationAdditionalInformationAbstract us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 207 Segment reporting information, Assets 2 us-gaap_SegmentReportingInformationAssets us-gaap true debit instant No definition available. false false false false false false false false false false false terselabel false 1 true true false false -1283000000 -1283 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 true true false false -665000000 -665 false false false xbrli:monetaryItemType monetary Amount 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 false 208 Segment reporting information, Percentage of Consolidated Assets 2 sre_SegmentReportingInformationPercentageOfAssets sre false na instant No definition available. false false false false false false false false false false false terselabel false 1 false true false false -4 -4 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false true false false -2 -2 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 1 After preferred dividends. 5 143 false Millions UnKnown UnKnown false true