Organization, Consolidation and Presentation of Financial Statements [Abstract] Schedule of Cash and Cash Equivalents [Table] Schedule of Cash and Cash Equivalents [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] San Diego Gas and Electric Company [Member] San Diego Gas and Electric Company [Member] Cash and Cash Equivalents [Line Items] Cash and Cash Equivalents [Line Items] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash, current Restricted Cash and Cash Equivalents, Current Restricted cash, noncurrent Restricted Cash and Cash Equivalents, Noncurrent Total cash, cash equivalents and restricted cash on the Condensed Consolidated Statement of Cash Flows Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Derivative Instruments and Hedging Activities Disclosure [Abstract] Commodity Derivative Volumes Table Schedule of Derivative Instruments [Table Text Block] Notional Amounts of Interest Rate Derivatives Table Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] Derivative Instruments on the Condensed Consolidated Balance Sheets Table Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Cash Flow Hedge Impact on the Condensed Consolidated Statements of Comprehensive Income Table Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block] Fair Value Hedge Impact on the Condensed Consolidated Statements of Operations Table Derivative Instruments, Gain (Loss) [Table Text Block] Fair Value Disclosures [Abstract] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Forecast [Member] Scenario, Forecast [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] Balance at January 1 Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs Realized and unrealized gains (losses) Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings Allocated transmission instruments Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Allocated Transmission Instruments Fair value measurement with unobservable inputs reconciliation recurring basis asset allocated transmission instruments. Settlements Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements Balance at March 31 Change in unrealized gains relating to instruments still held at the end of the period Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Congestion revenue rights (in dollars per MWH) Congestion Revenue Rights Congestion Revenue Rights Market electricity forward price inputs ( in dollars per MWH) Market Electricity Forward Price Inputs Market electricity forward price inputs. Income Tax Disclosure [Abstract] Schedule Of Income Tax Expense And Effective Income Tax Rates [Table] Schedule Of Income Tax Expense And Effective Income Tax Rates [Table] Southern California Gas Company [Member] Southern California Gas Company [Member] Sempra Mexico [Member] Sempra Mexico [Member] Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items] Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items] Federal tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Pretax income Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income tax expense Income Tax Expense (Benefit) ETR Effective Income Tax Rate Reconciliation, Percent Equity earnings, before income tax Income (Loss) from Equity Method Investments Write-off of wildfire regulatory asset Loss Contingency Accrual, Provision TCJA provisional income tax expense Tax Cuts and Jobs Act, Incomplete Accounting, Change in Tax Rate, Provisional Income Tax Expense (Benefit) Tax Cuts and Jobs Act, Incomplete Accounting, Change in Tax Rate, Provisional Income Tax Expense (Benefit) Income tax expense from transactional effects of foreign currency and inflation Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Income tax expense from transactional effects of foreign currency and inflation net of noncontrolling interest Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Net of Noncontrolling Interest, Amount Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Net of Noncontrolling Interest, Amount Gain (loss) from foreign currency derivatives Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net Gain (loss) from foreign currency derivatives after-tax Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net, After-tax Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net, After-tax Schedule of Capitalization [Table] Schedule of Capitalization [Table] Capitalized Financing Costs Disclosure [Line Items] Capitalized Financing Costs Disclosure [Line Items] Total capitalized financing costs Capitalized Financing Costs Total capitalized financing costs from both debt and equity instruments. Revenue from Contract with Customer [Abstract] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating Segments [Member] Operating Segments [Member] Consolidating Adjustments [Member] Consolidation, Eliminations [Member] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Sempra South American Utilities [Member] Sempra South American Utilities [Member] Sempra Renewables [Member] Sempra Renewables [Member] Sempra LNG & Midstream [Member] Sempra LNG & Midstream [Member] Sempra LNG & Midstream [Member] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Utilities service line [Member] Utilities Service Line [Member] Utilities Service Line [Member] Midstream service line [Member] Midstream Service LIne [Member] Midstream Service LIne [Member] Renewables service line [Member] Renewables Service LIne [Member] Renewables Service LIne [Member] Other service line [Member] Other Service Line [Member] Other Service Line [Member] Electric market [Member] Electricity [Member] Electricity [Member] Gas market [Member] Natural Gas [Member] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service [Domain] Over time [Member] Transferred over Time [Member] Point in time [Member] Transferred at Point in Time [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Revenues from contracts with customers Revenue from Contract with Customer, Excluding Assessed Tax Utilities regulatory revenues Utilities Regulatory Revenue Utilities Regulatory Revenue Other revenues Other Revenue, Net Total revenues Regulated and Unregulated Operating Revenue Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Sempra Texas Holdings Corp [Member] Sempra Texas Holdings Corp [Member] Sempra Texas Holdings Corp [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] LIBOR [Member] London Interbank Offered Rate (LIBOR) [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Floating Rate Notes due 2019 [Member] Floating Rate Notes Due Twenty Nineteen [Member] Floating Rate Notes Due Twenty Nineteen [Member] Floating Rate Notes due 2021 [Member] Floating Rate Notes Due Twenty Twenty One [Member] Floating Rate Notes Due Twenty Twenty One [Member] 2.400% Senior Notes due 2020 [Member] Two Point Four Percent Senior Notes Due Twenty Twenty [Member] Two Point Four Percent Senior Notes Due Twenty Twenty [Member] 2.900% Senior Notes due 2023 [Member] Two Point Nine Percent Senior Notes Due Twenty Twenty Three [Member] Two Point Nine Percent Senior Notes Due Twenty Twenty Three [Member] 3.400% Senior Notes due 2028 [Member] Three Point Four Percent Senior Notes Due Twenty Twenty Eight [Member] Three Point Four Percent Senior Notes Due Twenty Twenty Eight [Member] 3.800% Senior Notes due 2038 [Member] Three Point Eight Percent Senior Notes Due Twenty Twenty Eight [Member] Three Point Eight Percent Senior Notes Due Twenty Twenty Eight [Member] 4.000% Senior Notes due 2048 [Member] Four Percent Senior Notes Due Twenty Forty Eight [Member] Four Percent Senior Notes Due Twenty Forty Eight [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Proceeds from issuance of debt Proceeds from Issuance of Debt Debt discount and debt issuance costs Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Debt amount offered and sold Debt Instrument, Face Amount Stated rate of debt offered and sold Debt Instrument, Interest Rate, Stated Percentage Spread on variable rate Debt Instrument, Basis Spread on Variable Rate Repayments of debt Repayments of Debt Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Carrying amount [Member] Reported Value Measurement [Member] Fair value [Member] Estimate of Fair Value Measurement [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Variable Interest Entities [Axis] Variable Interest Entities [Axis] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] Otay Mesa VIE [Member] Otay Mesa VIE [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Long-term amounts due from unconsolidated affiliates Investments in and Advances to Affiliates, at Fair Value Long-term amounts due to unconsolidated affiliate Advances from Affiliates, at Fair Value Advances from Affiliates, at Fair Value Total long-term debt Notes Payable, Fair Value Disclosure Accumulated interest outstanding Interest Receivable Foreign currency translation Foreign Currency Transaction Gain, before Tax Unamortized discount (net of premium) and debt issuance costs Unamortized Discount and Debt Issuance Costs Unamortized Discount and Debt Issuance Costs Build-to-suit and capital lease obligations Capital Lease Obligations and Build-To-Suit Capital Lease Obligations and Build-To-Suit Long-term debt, gross Long-term Debt, Gross Capital lease obligations Capital Lease Obligations Debt and Credit Facilities Debt Disclosure [Text Block] Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Schedule of Timing of Remaining Performance Obligations Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Schedule of Contract Liabilities Contract with Customer, Asset and Liability [Table Text Block] Schedule of Contract Accounts Receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Business Combinations [Abstract] Acquistion and divestiture activity Mergers, Acquisitions and Dispositions Disclosures [Text Block] Regulated Operations [Abstract] Jointly Owned Utility Plant Interests [Table] Jointly Owned Utility Plant Interests [Table] Jointly Owned Utility Plant [Axis] Jointly Owned Utility Plant [Axis] Jointly Owned Utility Plant [Domain] Jointly Owned Utility Plant [Domain] Total Ownership [Member] Total Ownership [Member] SDG&E Ownership [Member] Jointly Owned Nuclear Power Plant [Member] Jointly Owned Utility Plant Interests [Line Items] Jointly Owned Utility Plant Interests [Line Items] Spent nuclear fuel damages awarded Loss Contingency, Damages Awarded, Value Decrease In SONGS regulatory asset Increase (Decrease) in Regulatory Assets and Liabilities Decrease In nuclear decommissioning balancing account Increase (Decrease) in Balancing Account, Utility Decrease In operation and maintenance cost balancing account Increase Decrease In Operation And Maintenance Cost Balancing Account Increase (Decrease) In Operation And Maintenance Cost Balancing Account. Filed claims amount Loss Contingency, Damages Sought, Value Commitments and Contingencies Disclosure [Abstract] Loss Contingencies [Table] Loss Contingencies [Table] Litigation Case [Axis] Litigation Case [Axis] Litigation Case [Domain] Litigation Case [Domain] Consolidated Class Action Complaints [Member] Consolidated Class Action Complaints [Member] Consolidated Class Action Complaints [Member] Property Class Action [Member] Property Class Action [Member] Property Class Action [Member] Complaints Filed by Public Entities [Member] Complaints Filed by Public Entities [Member] Complaints Filed by Public Entities [Member] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Wildfire [Member] Wildfire [Member] Aliso Canyon Natural Gas Storage Facility Gas Leak [Member] Aliso Canyon Natural Gas Storage Facility Gas Leak [Member] Damages from Product Defects [Member] Damages from Product Defects [Member] HMRC VAT Claim [Member] HMRC VAT Claim [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Liability for legal proceedings Estimated Litigation Liability Loss contingency accrual Loss Contingency Accrual Percent of Loss Accrual Allocated to Temporary Relocation Program Percent of Loss Accrual Allocated to Temporary Relocation Program Percent of Loss Accrual Allocated to Temporary Relocation Program Insurance Settlements Receivable Insurance Settlements Receivable After-tax charge for nonrecovery of CPUC regulatory assets After-Tax Earnings Impact After-Tax Earnings Impact Percent of arbitration expenses reduction of award Litigation Settlement, Percent of Arbitration Expenses Litigation Settlement, Percent of Arbitration Expenses Reserve for Aliso Canyon costs Payable Related To Natural Gas Leak Reserve for Aliso Canyon costs. Receivable related to natural gas leak Receivable related to natural gas leak Insurance receivable for Aliso Canyon costs Insurance receivable for Aliso Canyon costs Insurance Settlements Receivable, Noncurrent Insurance proceeds Proceeds from Insurance Settlement, Operating Activities Liability insurance coverage Liability Insurance Coverage Liability Insurance Coverage Number of lawsuits filed Loss Contingency, New Claims Filed, Number Number of lawsuits Loss Contingency, Pending Claims, Number Number of plaintiffs Loss Contingency, Number of Plaintiffs Maximum occupational safety and health fines Maximum Occupational Safety And Health Fines Maximum occupational safety and health fines Penalty assessments Penalty Assessments Penalty Assessments Maximum other assessments in settlement of criminal complaint Maximum Other Assessments Maximum Other Assessments Period of required climate reductions Loss Contingency, Period Of Required Climate Reductions Loss Contingency, Period Of Required Climate Reductions Period of required regulatory climate reductions Loss Contingency, Period Of Required Regulatory Climate Reductions Loss Contingency, Period Of Required Regulatory Climate Reductions Target emissions level (in metric tons) Loss Contingency, Target Emissions Level Loss Contingency, Target Emissions Level Environmental mitigation period Loss Contingency, Environmental Mitigation Period Loss Contingency, Environmental Mitigation Period Loss Contingency, Total Actual Emissions, Floor (in metric tons) Loss Contingency, Total Actual Emissions, Floor Loss Contingency, Total Actual Emissions, Floor Loss Contingency, Total Actual Emissions, Ceiling (in metric tons) Loss Contingency, Total Actual Emissions, Ceiling Loss Contingency, Total Actual Emissions, Ceiling Mitigation requirements (in metric tons) Loss Contingency, Mitigation Requirement Loss Contingency, Mitigation Requirement Amount of natural gas released Amount of Natural Gas Released Amount of Natural Gas Released Required working gas target Storage Facility, Working Gas Target Storage Facility, Working Gas Target Required working gas minimum Storage Facility, Working Gas Minimum Storage Facility, Working Gas Minimum Storage facility capacity Storage Facility Maximum Capacity Natural Gas Storage Facility Maximum Capacity Proportion of total gas storage capacity (percentage) Proportion Of Total Gas Storage Capacity, Percentage Proportion Of Total Gas Storage Capacity Percentage Net book value of Aliso Canyon facility Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment Construction work in progress of new compressor station Construction in Progress, Gross Contract with Customer, Asset and Liability [Table] Contract with Customer, Asset and Liability [Table] Contract with Customer, Asset and Liability [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Other Current Liabilities [Member] Other Current Liabilities [Member] Deferred Credits and Other [Member] Deferred Credits and Other [Member] Deferred Credits and Other [Member] Contract with Customer, Asset and Liability [Line Items] Contract with Customer, Asset and Liability [Line Items] [Line Items] for Contract with Customer, Asset and Liability [Table] Contract with Customer, Liability [Roll Forward] Contract with Customer, Liability [Roll Forward] Contract with Customer, Liability [Roll Forward] Opening balance, January 1, 2018 Contract with Customer, Liability Adoption of ASC 606 adjustment Contract with Customer, Liability, Adoption of Topic 606 Contract with Customer, Liability, Adoption of Topic 606 Revenue from performance obligations satisfied during reporting period Contract with Customer, Liability, Revenue Recognized Payments received in advance Contract with Customer, Advance Payments Received Contract with Customer, Advance Payments Received Closing balance, March 31, 2018 Other Income, Nonoperating [Abstract] Other Income [Table] Other Income [Table] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] IMG [Member] Infraestructura Marina del Golfo [Member] Infraestructura Marina del Golfo [Member] Other Income [Line Items] Other Income [Line Items] Other Income [Line Items] Allowance for equity funds used during construction Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity Investment gains Gain (Loss) on Investments Gains on interest rate and foreign exchange instruments, net Unrealized Gain (Loss) on Derivatives Foreign currency transaction gains, net Foreign Currency Transaction Gain (Loss), Realized Non-service component of net periodic benefit credit Defined Benefit Plan, Net Periodic Benefit Cost (Credit). Excluding Service Cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit). Excluding Service Cost Interest on regulatory balancing accounts, net Regulatory Interest, net Regulatory interest, net. Sundry, net Other Nonoperating Income (Expense) Total Nonoperating Income (Expense) Foreign currency transaction gain Equity losses Income (Loss) From Equity Investments Income (Loss) From Equity Investments Schedule of Regulatory Assets Schedule of Regulatory Assets [Table Text Block] Schedule of Regulatory Liabilities Schedule of Regulatory Liabilities [Table Text Block] Proposed Revenue Requirements Public Utilities General Disclosures [Table Text Block] Discontinued Operations and Disposal Groups [Abstract] Discontinued Operations and Disposal Groups [Abstract] Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Disposal Group Held-for-sale [Member] Disposal Group, Held-for-sale, Not Discontinued Operations [Member] Disposal Group Name [Axis] Disposal Group Name [Axis] Disposal Group Name [Domain] Disposal Group Name [Domain] TdM [Member] Termoelectrica de Mexicali [Member] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Generating capacity (in mw) Power Plant, Energy Generating Capacity Power Plant, Energy Generating Capacity Deferred tax expense Deferred Tax Expense (Benefit) From The Outside Basis Difference Deferred Tax Expense (Benefit) From The Outside Basis Difference on our Investment Assets Held for Sale, Assets [Abstract] Disposal Group, Including Discontinued Operation, Assets [Abstract] Inventories Disposal Group, Including Discontinued Operation, Inventory, Current Other current assets Disposal Group, Including Discontinued Operation, Other Assets, Current Property, plant and equipment, net Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Noncurrent Other noncurrent assets Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent Total assets held for sale Disposal Group, Including Discontinued Operation, Assets Assets Held for Sale, Liabilities [Abstract] Disposal Group, Including Discontinued Operation, Liabilities [Abstract] Accounts payable Disposal Group, Including Discontinued Operation, Accounts Payable, Current Current liabilities Disposal Group, Including Discontinued Operation, Other Liabilities, Current Asset retirement obligations Disposal Group Including Discontinued Operation Asset Retirement Obligations Noncurrent Assets Held for Sale, Asset Retirement Obligations Other noncurrent liabilities Disposal Group, Including Discontinued Operation, Other Liabilities, Noncurrent Total liabilities held for sale Disposal Group, Including Discontinued Operation, Liabilities Rabbi trust Assets Held-in-trust, Noncurrent Investments, Fair Value Disclosure [Abstract] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Project [Axis] Project [Axis] Project [Domain] Project [Domain] SONGS 1 Decommissioning [Member] SONGS 1 Decommissioning [Member] SONGS 1 Decommissioning [Member] SONGS 2 and 3 Decommissioning [Member] SONGS 2 and 3 Decommissioning [Member] SONGS 2 and 3 Decommissioning [Member] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Total debt securities [Member] Debt Securities [Member] U.S. government corporations and agencies [Member] US Treasury and Government [Member] Municipal bonds [Member] US States and Political Subdivisions Debt Securities [Member] Other securities [Member] Other Debt Obligations [Member] Equity securities [Member] Equity Securities [Member] Cash and cash equivalents [Member] Cash and Cash Equivalents [Member] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Anticipated term of dismantlement work Environmental Exit Costs, Anticipated Term Environmental Exit Costs, Anticipated Term Percent of dismantlement work expense Environmental Exit Costs, Anticipated Cost, Percentage Environmental Exit Costs, Anticipated Cost, Percentage Environmental exit costs, anticipated cost Environmental Exit Costs, Anticipated Cost Environmental Exit Costs, Anticipated Internal Costs Environmental Exit Costs, Anticipated Internal Costs Environmental Exit Costs, Anticipated Internal Costs Authorized recovery amount, nuclear decommissioning trust funding Authorized Recovery Amount, Nuclear Decommissioning Trust Funding Authorized Recovery Amount, Nuclear Decommissioning Trust Funding. Cost Available-for-sale Securities, Amortized Cost Basis Gross unrealized gains Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax Gross unrealized losses Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Estimated fair value Available-for-sale Securities Proceeds from sales Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds Gross realized gains Available-for-sale Securities, Gross Realized Gains Gross realized losses Available-for-sale Securities, Gross Realized Losses Unrecorded Unconditional Purchase Obligation [Table] Unrecorded Unconditional Purchase Obligation [Table] Renewables Projects Renewables Projects [Member] Renewables Projects [Member] Liquid Fuels Terminals Liquid Fuels Terminals [Member] Liquid Fuels Terminals [Member] Lease Arrangement, Type [Axis] Lease Arrangement, Type [Axis] Lease Arrangement, Type [Domain] Lease Arrangement, Type [Domain] Operating Lease [Member] Operating Lease [Member] Operating Lease [Member] Sempra Energy [Member] Sempra Energy [Member] Category of Item Purchased [Axis] Category of Item Purchased [Axis] Long-term Purchase Commitment, Category of Item Purchased [Domain] Long-term Purchase Commitment, Category of Item Purchased [Domain] Natural Gas Contracts [Member] Natural Gas Contracts [Member] Liquefied Natural Gas Contracts [Member] Liquefied Natural Gas Contracts [Member] Unrecorded Unconditional Purchase Obligation [Line Items] Unrecorded Unconditional Purchase Obligation [Line Items] Increase (decrease) in commitment amount Increase (Decrease) in Unrecorded Unconditional Purchase Obligation Increase (Decrease) in Unrecorded Unconditional Purchase Obligation Increase (decrease) in commitment amount, 2018 Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Remainder of Fiscal Year Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Remainder of Fiscal Year Increase (decrease) in commitment amount, 2019 Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Year Two Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Year Two Settlement amount received Litigation Settlement, Amount Awarded from Other Party Increase (decrease) in commitment amount, 2020 Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Year Three Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Year Three Increase (decrease) in commitment amount, 2021 Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Year Four Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Year Four Increase (decrease) in commitment amount, 2022 Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Year Five Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Year Five Increase (decrease) in commitment amount, thereafter Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, After Five Years Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, After Five Years Term of power purchase agreement Power Purchase Agreement, Term Power Purchase Agreement, Term Line of Credit Facility [Table] Line of Credit Facility [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Commercial Paper [Member] Commercial Paper [Member] Revolving Credit Facility [Member] Revolving Credit Facility [Member] Sempra Energy Consolidated [Member] Sempra Energy Consolidated [Member] Sempra U.S. Businesses [Member] Sempra U.S. Businesses [Member] Sempra U.S. Businesses [Member] Foreign Operations [Member] South American Utilities and Mexico Combined [Member] South American Utilities and Mexico Combined [Member] Sempra Global [Member] Sempra Global [Member] Sempra Global [Member] California Utilities Combined [Member] California Utilities Combined [Member] California Utilities Combined [Member] Oncor Electric Delivery Company LLC. [Member] Oncor Electric Delivery Company LLC. [Member] Oncor Electric Delivery Company LLC. [Member] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Peru [Member] PERU Chile [Member] CHILE Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Increase in borrowing capacity Line of Credit Facility, Increase in Borrowing Capacity Line of Credit Facility, Increase in Borrowing Capacity Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Number of primary lines of credit Number of Primary Lines of Credit Number of Primary Lines of Credit Amount outstanding Long-term Line of Credit Borrowing limit adjustment Line of Credit Facility, Borrowing Limit Adjustment Line of Credit Facility, Borrowing Limit Adjustment Adjustment to borrowing limit Line of Credit Facility, Adjustment to Borrowing Limit Line of Credit Facility, Adjustment to Borrowing Limit Limit on facility borrowings Line of Credit Facility, Borrowing Limit Reduction Line of Credit Facility, Borrowing Limit Reduction Limit on borrowings available Line of Credit Facility, Available Unused Credit Limit Reduction Line of Credit Facility, Available Unused Credit Limit Reduction Available unused credit Line of Credit Facility, Remaining Borrowing Capacity Capacity for issuance of letters of credit Line Of Credit Facility, Letters Of Credit Capacity Committed lines of credit, capacity for issuance of letters of credit. Maximum ratio of indebtedness to total capitalization Line Of Credit Facility, Maximum Ratio Of Indebtedness To Total Capitalization Committed lines of credit, maximum ratio of indebtedness to total capitalization. Committed lines of credit, maximum ratio of debt to equity Line Of Credit Facility Maximum Ratio Of Debt To Equity Committed lines of credit, maximum ratio of debt to equity. Bank guarantee Bank Guarantee An agreement (contract) that requires the guarantor to make payments to the guaranteed party based on another entity's failure to pay specified obligations, such as debt, to a lender. Term of debt instrument Debt Instrument, Term Standby letters of credit outstanding Letters of Credit Outstanding, Amount Weighted average interest rate on total short-term debt outstanding Short-term Debt, Weighted Average Interest Rate, at Point in Time Accounting Changes and Error Corrections [Abstract] New Accounting Pronouncements and Changes in Accounting Principles [Abstract] New Accounting Pronouncements and Changes in Accounting Principles [Abstract] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] As previously reported [Member] Scenario, Previously Reported [Member] Effect of adoption [Member] Restatement Adjustment [Member] New Accounting Pronouncement, Early Adoption [Axis] New Accounting Pronouncement, Early Adoption [Axis] New Accounting Principles, Early Adoption [Domain] New Accounting Principles, Early Adoption [Domain] New Accounting Pronouncement, Early Adoption, Effect [Member] New Accounting Pronouncement, Early Adoption, Effect [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2016-18 [Member] Accounting Standards Update 2016-18 [Member] Accounting Standards Update 2016-01 and 2018-03 [Member] Accounting Standards Update 2016-01 and 2018-03 [Member] Accounting Standards Update 2016-01 and 2018-03 [Member] Accounting Standards Update 2017-07 [Member] Accounting Standards Update 2017-07 [Member] Accounting Standards Update 2017-07 [Member] Accounting Standards Update 2017-12 [Member] Accounting Standards Update 2017-12 [Member] Accounting Standards Update 2017-12 [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Cumulative-effect adjustment from change in accounting principle Cumulative Effect of New Accounting Principle in Period of Adoption Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES Net Cash Provided by (Used in) Operating Activities [Abstract] Changes in other assets Increase (Decrease) in Other Noncurrent Assets Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities CASH FLOWS FROM INVESTING ACTIVITIES Net Cash Provided by (Used in) Investing Activities [Abstract] Expenditures for investments and acquisition of businesses, net of cash and cash equivalents acquired Payments to Acquire Investments Increases in restricted cash Increase in Restricted Cash Decreases in restricted cash Decrease in Restricted Cash Other Payments for (Proceeds from) Other Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities CASH FLOWS FROM FINANCING ACTIVITIES Net Cash Provided by (Used in) Financing Activities [Abstract] Other Proceeds from (Payments for) Other Financing Activities Net Cash Provided by (Used in) Financing Activities Net Cash Provided by (Used in) Financing Activities Effect of Exchange Rate on Cash and Cash Equivalents Effect of Exchange Rate on Cash and Cash Equivalents Effect of exchange rate changes on cash, cash equivalents and restricted cash Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents (Decrease) increase in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) (Decrease) increase in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash and cash equivalents beginning balance Cash and cash equivalents ending balance Cash, cash equivalents and restricted cash beginning balance Cash, cash equivalents and restricted cash ending balance Income Statement [Abstract] Income Statement [Abstract] Operation and maintenance Other Cost and Expense, Operating Operation and maintenance Utilities Operating Expense, Maintenance and Operations Total operating expenses Utilities Operating Expense Operating income Operating Income (Loss) Other income, net Statement [Table] Statement [Table] Statement [Line Items] Statement [Line Items] REVENUES Regulated and Unregulated Operating Revenue [Abstract] Utilities Regulated Operating Revenue Energy-related businesses Unregulated Operating Revenue Operating revenues Electric and Gas Revenue [Abstract] Electric Electric Revenue Natural gas Gas Domestic Regulated Revenue Total operating revenues Electric and Gas Revenue Operating expenses Operating Expenses [Abstract] Utilities: Utilities [Abstract] Cost of electric fuel and purchased power Cost of Domestic Regulated Electric Cost of natural gas Cost of Natural Gas Purchases Energy-related businesses: Energy Related Businesses [Abstract] Cost of natural gas, electric fuel and purchased power Cost of natural gas, electric fuel and purchased power Energy-related businesses cost of electric fuel and purchased power recorded during the period. Other cost of sales Gas Gathering, Transportation, Marketing and Processing Costs (Income) Gas Gathering, Transportation, Marketing and Processing Costs (Income) Operation and maintenance Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Franchise fees and other taxes Taxes, Other Impairment of wildfire regulatory asset Operating expenses Utilities Operating Expense [Abstract] Cost of electric fuel and purchased power Utilities Operating Expense, Purchased Power Cost of natural gas Utilities Operating Expense, Gas and Petroleum Purchased Depreciation and amortization Utilities Operating Expense, Depreciation and Amortization Franchise fees and other taxes Utilities Operating Expense, Taxes Total operating expenses Operating income Interest income Investment Income, Interest Interest expense Interest Expense Income before income taxes and equity losses of unconsolidated subsidiaries Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income tax expense Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Losses (earnings) attributable to noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest Mandatory convertible preferred stock dividends Preferred Stock Dividends, Income Statement Impact Net Income/Earnings attributable to common shares Net Income (Loss) Available to Common Stockholders, Basic Basic earnings per common share (in dollars per share) Earnings Per Share, Basic Weighted-average number of shares outstanding, basic Weighted Average Number of Shares Outstanding, Basic Diluted earnings per common share (in dollars per share) Earnings Per Share, Diluted Weighted-average number of shares outstanding, diluted Weighted Average Number of Shares Outstanding, Diluted Dividends declared per share of common stock (in dollars per share) Common Stock, Dividends, Per Share, Declared Statement of Financial Position [Abstract] Otay Mesa VIE [Member] Ownership Interests Held By Others, Otay Mesa VIE [Member] Property, plant and equipment, net related to VIE Property, Plant and Equipment, Net Long-term Debt and Capital Lease Obligations Stockholders' Equity Attributable to Parent [Abstract] Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, shares issued Preferred Stock, Shares Issued Preferred stock, shares outstanding Preferred Stock, Shares Outstanding Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares outstanding Common Stock, Shares, Outstanding Common stock, No par value (in dollars per share) Common Stock, No Par Value Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Designated as Hedging Instrument [Member] Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument [Member] Hedging Relationship [Axis] Hedging Relationship [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Cash Flow Hedging [Member] Cash Flow Hedging [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Interest Expense [Member] Interest Expense [Member] Other Income, Net [Member] Other Income [Member] Equity Losses [Member] Equity Earnings Net Of Income Tax [Member] Revenues: Energy- Related Businesses [Member] Sales [Member] Operation and Maintenance [Member] Operating Expense [Member] Cost of Electric Fuel and Purchased Power [Member] Cost of Electric Fuel and Purchased Power [Member] Cost of Natural Gas [Member] Cost of Natural Gas [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Interest rate instruments [Member] Interest Rate Contract [Member] Interest rate and foreign exchange instruments [Member] Cross Currency Interest Rate Contract [Member] Foreign exchange instruments [Member] Foreign Exchange [Member] Commodity contracts not subject to rate recovery [Member] Commodity Contract [Member] Commodity contracts subject to rate recovery [Member] Commodity Contracts Subject To Rate Recovery [Member] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Pretax gain (loss) on derivatives recognized in earnings Derivative, Gain (Loss) on Derivative, Net Pretax gain (loss) recognized in OCI Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net Pretax (loss) gain reclassified from AOCI into earnings Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Foreign currency translation adjustments [Member] Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Financial instruments [Member] Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Pension and other postretirement benefits [Member] Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Total accumulated other comprehensive income (loss) [Member] AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] AOCI, beginning balance Accumulated Other Comprehensive Income (Loss), Net of Tax OCI before reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Amounts reclassified from AOCI Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Net OCI Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent AOCI, ending balance Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Operating lease term Lessee, Operating Lease, Term of Contract Derivative [Table] Derivative [Table] SDG&E [Member] S D G E Segment [Member] SoCalGas [Member] So Cal Gas Segment [Member] Natural gas [Member] Natural Gas Derivative [Member] Natural Gas Derivative [Member] Electricity [Member] Electric Energy Derivative [Member] Electric Energy Derivative [Member] Congestion revenue rights [Member] Congestion Revenue Rights Derivative [Member] Congestion Revenue Rights Derivative [Member] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Net derivative energy volumes Derivative, Nonmonetary Notional Amount, Energy Measure Preferred Stock [Member] Preferred Stock [Member] Common Stock [Member] Common Stock [Member] Net Income Earnings / Net Income Net Income (Loss) Attributable to Parent Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation and amortization Deferred income taxes and investment tax credits Deferred Income Taxes and Tax Credits Equity losses Income (Loss) from Equity Method Investments, Net of Dividends or Distributions Fixed-price contracts and other derivatives Other Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities Net change in other working capital components Increase (Decrease) in Operating Capital Insurance receivable for Aliso Canyon costs Increase (Decrease) in Insurance Settlements Receivable Changes in other liabilities Increase (Decrease) in Other Noncurrent Liabilities Net cash provided by operating activities Expenditures for property, plant and equipment Payments to Acquire Productive Assets Expenditures for investments and acquisitions, net of cash and cash equivalents acquired Distributions from investments Proceeds from Equity Method Investment, Distribution, Return of Capital Purchases of nuclear decommissioning trust assets Purchases of nuclear decommissioning and other trust assets The cash outflow for the purchase of nuclear decommissioning and other trust assets. Proceeds from sales by nuclear decommissioning trusts Proceeds from sales by nuclear decommissioning and other trusts The cash inflow for the sales of nuclear decommissioning and other trust assets. Purchases of nuclear decommissioning trust assets Payments to Acquire Investments to be Held in Decommissioning Trust Fund Proceeds from sales by nuclear decommissioning trusts Proceeds from Decommissioning Trust Fund Assets Increases in restricted cash Advances to unconsolidated affiliates Payments to Fund Long-term Loans to Related Parties Repayments of advances to unconsolidated affiliates Proceeds from Collection of (Payments to Fund) Long-term Loans to Related Parties Decrease in loans to affiliate, net Increase (Decrease) in Due to Related Parties Net cash used in investing activities Common dividends paid Payments of Ordinary Dividends, Common Stock Issuances of mandatory convertible preferred stock, net of $32 in offering costs Proceeds from Issuance of Convertible Preferred Stock Issuances of common stock, net of $24 in offering costs Proceeds from Issuance of Common Stock Repurchases of common stock Payments for Repurchase of Common Stock Issuances of debt (maturities greater than 90 days) Proceeds from Issuance of Long-term Debt Payments on debt (maturities greater than 90 days) Repayments of Long-term Debt Increase (decrease) in short-term debt, net Proceeds from (Repayments of) Short-term Debt, Maturing in Three Months or Less Settlement of cross-currency swap Payments for Hedge, Financing Activities Capital distributions made by VIE, net Payments to Noncontrolling Interests Net cash provided by (used in) financing activities Decrease in cash, cash equivalents and restricted cash (Decrease) increase in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Increase (decrease) in cash and cash equivalents SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION Supplemental Cash Flow Information [Abstract] Interest payments, net of amounts capitalized Interest Paid, Net Income tax payments, net of refunds Income Taxes Paid, Net SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Assets acquired Fair Value of Assets Acquired Liabilities assumed Liabilities Assumed Cash paid Payments to Acquire Businesses, Net of Cash Acquired Accrued capital expenditures Capital Expenditures Incurred but Not yet Paid Accrued Merger-related transaction and financing costs Business Combination, Acquisition Related Costs Increase in capital lease obligations for investment in property, plant and equipment Increase in capital lease obligations for investment in property, plant and equipment Increase in capital lease obligations for investment in property, plant and equipment. Equitization of note receivable due from unconsolidated affiliate Debt Conversion, Converted Instrument, Amount Common dividends issued in stock Common Stock Issued, Employee Stock Trust Dividends declared but not paid Dividends Payable Jointly Owned Utility Plant, Net Ownership Amount [Abstract] Jointly Owned Nuclear Power Plant [Member] Regulatory Asset [Axis] Regulatory Asset [Axis] Regulatory Asset [Domain] Regulatory Asset [Domain] Asset Retirement Obligation Costs [Member] Asset Retirement Obligation Costs [Member] Jointly Owned Utility Plant Interests [Line Items] Jointly owned utility plant, proportionate ownership share Jointly Owned Utility Plant, Proportionate Ownership Share Settlement amount awarded Settlement amount net of arbitration expense Litigation Settlement Amount, Net of Arbitration Expense Litigation Settlement Amount, Net of Arbitration Expense Arbitration expense Arbitration Expense Arbitration Expense Legal costs Legal Fees Litigation settlement amount allocated to ratepayers and shareholders Litigation Settlement Amount Allocated to Ratepayers and Shareholders Litigation Settlement Amount Allocated to Ratepayers and Shareholders Regulatory asset threshold to cease rate recovery Regulatory Asset Threshold to Cease Rate Recovery Regulatory Asset Threshold to Cease Rate Recovery Regulatory asset Regulatory Asset, Nuclear Plant Closure Regulatory Asset, Nuclear Plant Closure. Regulatory asset, current Regulatory Assets, Current Regulatory asset, noncurrent Regulatory Assets, Noncurrent Nuclear decommissioning trusts Decommissioning Fund Investments Schedule of Cash and Cash Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Schedule of Prior Period Adjustments Schedule of Error Corrections and Prior Period Adjustments [Table Text Block] Inventory Table Schedule of Inventory, Current [Table Text Block] Variable Interest Entity Table Schedule of Variable Interest Entities [Table Text Block] Net Periodic Benefit Cost Table Schedule of Net Benefit Costs [Table Text Block] Contributions to Benefit Plans Table Schedule Of Contributions To Benefit Plans [Text Block] Tabular disclosure of contributions to benefit plans. Earnings Per Share Computations Table Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Capitalized Financing Costs Table Schedule of Capitalization [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) Table Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Reclassifications out of AOCI Table Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Shareholders' Equity and Noncontrolling Interests Table Schedule of Stockholders Equity [Table Text Block] Ownership Interests Held By Others Table Schedule of Other Ownership Interests [Table Text Block] Transactions with Affiliates Table Schedule of Related Party Transactions [Table Text Block] Other Income and Expense Table Schedule of Other Nonoperating Income (Expense) [Table Text Block] Income Tax Expense and Effective Income Tax Rates Table Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Cross currency swaps [Member] Other foreign currency derivatives [Member] Notional amount of derivative Derivative Liability, Notional Amount Maturity date Derivative, Maturity Date Sale of Stock [Axis] Sale of Stock [Axis] Sale of Stock [Domain] Sale of Stock [Domain] Over-Allotment Option [Member] Over-Allotment Option [Member] Public Offering [Member] Public Offering [Member] Public Offering [Member] Settlement of Forward Sale Contracts [Member] Settlement of Forward Sale Contracts [Member] Settlement of Forward Sale Contracts [Member] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Convertible Preferred Stock [Member] Convertible Preferred Stock [Member] Parent [Member] Parent [Member] Noncontrolling Interest [Member] Noncontrolling Interest [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Equity, beginning of period Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Equity, beginning of period Stockholders' Equity Attributable to Parent Comprehensive income (loss) Total Comprehensive Income Before Preferred Stock Dividend Requirements Total comprehensive income before preferred stock dividend requirements. Share-based compensation expense Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Mandatory convertible preferred stock dividends declared Dividends, Preferred Stock Common stock dividends declared Dividends, Common Stock Issuances of mandatory convertible preferred stock Preferred Stock Issued During Period, Value Preferred Stock Issued During Period, Value Issuances of common stock Stock Issued During Period, Value, New Issues Repurchases of common stock Stock Repurchased During Period, Value Distributions to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Equity, end of period Equity, end of period Shares issued Stock Issued During Period, Shares, New Issues Stated rate of debt Conversion price (in usd per share) Debt Instrument, Convertible, Conversion Price Conversion price net of underwriting discount (in usd per share) Debt Instrument, Convertible, Conversion Price, Net of Underwriting Discount Debt Instrument, Convertible, Conversion Price, Net of Underwriting Discount Liquidation price (in usd per share) Preferred Stock, Liquidation Preference Per Share Proceeds from issuance Underwriting discount Payments for Underwriting Expense Shares issued (in usd per share) Shares Issued, Price Per Share Shares issued net of underwriting discount (in usd per share) Shares Issued, Price Per Share, Net of Underwriting Discount Shares Issued, Price Per Share, Net of Underwriting Discount Proceeds from issuance Forward sales price (in usd per share) Forward Contract Indexed to Issuer's Equity, Forward Rate Per Share Shares issuable under forward contracts Forward Contract Indexed to Issuer's Equity, Shares Schedule of Error Corrections and Prior Period Adjustment Restatement [Table] Schedule of Error Corrections and Prior Period Adjustment Restatement [Table] Error Corrections and Prior Period Adjustments Restatement [Line Items] Error Corrections and Prior Period Adjustments Restatement [Line Items] Equity losses, net of income tax Income (Loss) From Equity Method Investments Net Of Tax Equity earnings, net of income tax. Schedule Of Net Regulatory Assets (Liabilities) [Table] Schedule Of Net Regulatory Assets (Liabilities) [Table] Component Of Net Regulatory Assets (Liabilities) [Axis] Component Of Net Regulatory Assets (Liabilities) [Axis] Net Regulatory Assets (Liabilities) [Domain] Net Regulatory Assets (Liabilities) [Domain] Fixed-price contracts and other derivatives [Member] Fixed Price Contracts And Other Derivatives [Member] Deferred income taxes (refundable) recoverable in rates [Member] Deferred Income Tax Charge [Member] Pension and other postretirement benefit plan obligations [Member] Pension And Other Postretirement Benefit Obligations [Member] Employee benefit costs [Member] Employee Benefit Costs [Member] Removal obligations [Member] Unamortized loss on reacquired debt [Member] Loss on Reacquired Debt [Member] Environmental costs [Member] Environmental Restoration Costs [Member] Workers’ compensation [Member] Workers Compensation Costs [Member] Regulatory Balancing Accounts, Commodity - gas including transportation Regulatory Balancing Accounts, Commodities, Gas and Transportation [Member] Regulatory Balancing Accounts, Commodities, Gas and Transportation [Member] Sunrise Powerlink fire mitigation [Member] Sunrise Powerlink Fire Mitigation [Member] Regulatory Balancing Accounts, Commodity – electric [Member] Regulatory Balancing Accounts, Commodities, Electricity [Member] Regulatory Balancing Accounts, Commodities, Electricity [Member] Regulatory Balancing Accounts, Gas transportation [Member] Regulatory Balancing Accounts, Gas Transportation [Member] Regulatory Balancing Accounts, Gas Transportation [Member] Regulatory Balancing Accounts, Safety and reliability [Member] Regulatory Balancing Accounts, Safety and Reliability [Member] Regulatory Balancing Accounts, Safety and Reliability [Member] Regulatory Balancing Accounts, Public purpose programs [Member] Regulatory Balancing Accounts, Public Purpose Programs [Member] Regulatory Balancing Accounts, Public Purpose Programs [Member] Regulatory Balancing Accounts, Other balancing accounts [Member] Regulatory Balancing Accounts, Other [Member] Regulatory Balancing Accounts, Other [Member] Other regulatory (liabilities) assets [Member] Other [Member] Other [Member] Net Regulatory Assets (Liabilities) SDGE [Member] Net Regulatory Assets (Liabilities) S D G E [Member] Net Regulatory Assets (Liabilities) SoCalGas [Member] Net Regulatory Assets (Liabilities) So Cal Gas [Member] Sempra Mexico [Member] Sempra Mexico Segment [Member] Net Regulatory Assets (Liabilities) Sempra Energy Consolidated [Member] Net Regulatory Assets (Liabilities) Sempra Energy Consolidated [Member] Schedule Of Net Regulatory Assets (Liabilities) [Line Items] Schedule Of Net Regulatory Assets (Liabilities) [Line Items] Net regulatory assets (liabilities) Net Regulatory Assets (Liabilities) Net regulatory assets (liabilities). Regulatory balancing accounts - net undercollected, Noncurrent Regulatory Balancing Accounts, Undercollected, Noncurrent Regulatory Balancing Accounts, Undercollected, Noncurrent Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Member] Reclassification out of Accumulated Other Comprehensive Income [Member] Gains (Losses) on Cash Flow hedges [Member] Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member] Gains (Losses) on Cash Flow hedges Attributable to Noncontrolling Interests [Member] Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Noncontrolling Interest [Member] Gains (Losses) on Cash Flow hedges Attributable to Parent [Member] Gain (Loss) on Pension and Other Postretirement Benefits [Member] Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] Pension and Other Postretirement Benefits [Member] Foreign exchange instruments [Member] Foreign Exchange Contract [Member] Commodity contracts not subject to rate recovery [Member] Commodity Contracts Not Subject To Rate Recovery [Member] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Revenues: Energy-Related Businesses Income before income taxes and equity (losses) earnings of certain unconsolidated subsidiaries Income Tax Benefit (Expense) Net of income tax Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Earnings Attributable to Noncontrolling Interests Earnings (losses) Amortization of actuarial loss(2) Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax Income tax expense Reclassification from AOCI, Current Period, Tax Total reclassifications for the period, net of tax Schedule of General Rate Case [Table] Schedule of General Rate Case [Table] Otay Mesa Energy Center [Member] Otay Mesa Energy Center [Member] Otay Mesa Energy Center [Member] Regulatory Agency [Axis] Regulatory Agency [Axis] Regulatory Agency [Domain] Regulatory Agency [Domain] California Public Utilities Commission [Member] California Public Utilities Commission [Member] California Public Utilities Commission [Member] Public Utilities, Regulatory Proceeding [Axis] Public Utilities, Regulatory Proceeding [Axis] Public Utilities, Regulatory Proceeding [Domain] Public Utilities, Regulatory Proceeding [Domain] General Rate Case [Member] General Rate Case [Member] General Rate Case [Member] Future Refund of Rates to Customers [Member] Future Refund of Rates to Customers [Member] Future Refund of Rates to Customers [Member] Future Refund of Rates to Customers - FERC [Member] Future Refund of Rates to Customers - FERC [Member] Future Refund of Rates to Customers - FERC [Member] General Rate Case [Line Items] General Rate Case [Line Items] GRC requested revenue requirement General Rate Case, Revenue Requirement Requested General Rate Case, Revenue Requirement Requested GRC requested revenue requirement adjustment General Rate Case, Revenue Requirement Adjustment Requested General Rate Case, Revenue Requirement Adjustment Requested Proposed annual attrition percentage General Rate Case, Proposed Annual Attrition Percent General Rate Case, Proposed Annual Attrition Percent Owning and operating costs Operating Expenses GRC requested revenue requirement adjustment percentage General Rate Case, Revenue Requirement Adjustment, Percentage General Rate Case, Revenue Requirement Adjustment, Percentage Tax Cuts and Jobs Act, Change in Tax Rate, Change in Revenue Requirement Tax Cuts and Jobs Act, Change in Tax Rate, Change in Revenue Requirement Tax Cuts and Jobs Act, Change in Tax Rate, Change in Revenue Requirement GRC revenue requirement General Rate Case, Revenue Requirement General Rate Case, Revenue Requirement. Regulatory liability Regulatory Liability Regulatory Liability. Tracked income tax expense liability Liability Associated With Tracked Income Tax Expense Differences Liability Associated With Tracked Income Tax Expense Differences Segment Reporting [Abstract] Segment Information Segment Reporting Disclosure [Text Block] Schedule of Investments [Abstract] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Oncor Holdings [Member] Oncor Holdings Electric Delivery Company LLC [Member] Oncor Holdings Electric Delivery Company LLC [Member] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Gross revenues Equity Method Investment, Summarized Financial Information, Revenue Operating expense Equity Method Investment Summarized Financial Information Operating Expense Equity method investment summarized financial information operating expense Income from operations Equity Method Investment, Summarized Financial Information, Income (Loss) from Continuing Operations Interest expense Equity Method Investment Summarized Financial Information Interest Expense Equity method investment summarized financial information interest expense. Income tax expense Equity Method Investment, Summarized Financial Information, Income Tax Expense (Benefit) Equity Method Investment, Summarized Financial Information, Income Tax Expense (Benefit) Net income / Earnings Equity Method Investment, Summarized Financial Information, Net Income (Loss) Plaintiffs [Member] Plaintiffs [Member] Plaintiffs [Member] Energy Future Holdings Corp. [Member] Energy Future Holdings Corp. [Member] Energy Future Holdings Corp. [Member] VAT tax claim paid upon appeal VAT Tax Claim Amount VAT Tax Claim Amount. Investment in RBS Sempra Commodities LLP Investment In Joint Venture Investment in RBS Sempra Commodities LLP. Number of proof of claims Loss Contingency, Proof of Claims, Number Loss Contingency, Proof of Claims, Number Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Ownership [Axis] Ownership [Axis] Ownership [Domain] Ownership [Domain] Adjustments and eliminations [Member] Segment Reconciling Items [Member] All other [Member] Corporate, Non-Segment [Member] Intersegment eliminations [Member] Intersegment Eliminations [Member] Sempra Texas Utility [Member] Sempra Texas Utility [Member] Sempra Texas Utility [Member] Sempra South American Utilities [Member] Sempra South American Utilities Segment [Member] Sempra Renewables [Member] Sempra Renewables Segment [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Number of reportable segments Number of Reportable Segments Ownership interest Equity Method Investment, Ownership Percentage Segment Reporting Information, Profit (Loss) [Abstract] Segment Reporting Information, Profit (Loss) [Abstract] REVENUES Revenues INTEREST EXPENSE INTEREST INCOME DEPRECIATION AND AMORTIZATION Depreciation, Depletion and Amortization INCOME TAX EXPENSE (BENEFIT) Segment Reporting Information, Additional Information [Abstract] Segment Reporting Information, Additional Information [Abstract] EXPENDITURES FOR PROPERTY, PLANT & EQUIPMENT Payments to Acquire Property, Plant, and Equipment ASSETS Assets EQUITY METHOD AND OTHER INVESTMENTS Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures New Accounting Pronouncement, Early Adoption New Accounting Pronouncement, Early Adoption [Table Text Block] Schedule of New Accounting Pronouncements and Changes in Accounting Principles Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Current assets: Fixed-price contracts and other derivatives [Member] Other Current Assets [Member] Other assets: Sundry [Member] Other Noncurrent Assets [Member] Current liabilities: Fixed-price contracts and other derivatives [Member] Deferred credits and other liabilities: Fixed-price contracts and other derivatives [Member] Other Noncurrent Liabilities [Member] Derivatives designated as hedging instruments: Derivative Instruments in Hedges, at Fair Value, Net [Abstract] Interest rate and foreign exchange instruments Derivative Interest Rate And Foreign Exchange Instruments Designated Interest rate instruments designated as hedging instruments. Interest rate instruments Interest Rate Derivative Instruments Designated as Hedging Instruments at Fair Value Interest Rate Derivative Instruments Designated as Hedging Instruments at Fair Value Derivatives not designated as hedging instruments: Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract] Foreign exchange instruments DerivativeForeignExchangeInstrumentsNondesignated Derivative Foreign Exchange Instruments Nondesignated Commodity contracts not subject to rate recovery Derivative Commodity Contracts Not Subject To Rate Recovery Nondesignated Derivative commodity contracts not subject to rate recovery, nondesignated. Associated offsetting commodity contracts Derivative Offsetting Commodity Contracts Not Subject To Rate Recovery Nondesignated Associated offsetting commodity contracts not subject to rate recovery. Commodity contracts subject to rate recovery Derivative Commodity Contracts Subject To Rate Recovery Nondesignated Derivative commodity contracts subject to rate recovery, nondesignated. Associated offsetting commodity contracts Derivative Offsetting Commodity Contracts Subject To Rate Recovery Nondesignated Associated cash collateral commodity contracts subject to rate recovery. Associated offsetting cash collateral Associated cash collateral commodity contracts subject to rate recovery Associated offsetting commodity contracts subject to rate recovery. Net amounts presented on the balance sheet Other Derivatives As Hedging Instruments At Fair Value Net Before Cash Collateral Other derivatives as hedging instruments at fair value net before cash collateral. Additional cash collateral for commodity contracts not subject to rate recovery Additional Margin Posted For Commodity Contracts Not Subject to Rate Recovery Additional margin posted for commodity contracts not subject to rate recovery. Additional cash collateral for commodity contracts subject to rate recovery Additional Margin Posted For Commodity Contracts Subject to Rate Recovery Additional margin posted for commodity contracts subject to rate recovery. Total Derivative Instruments in Hedges, at Fair Value, Net Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract] Investments at NAV Investments Net Asset Value Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Recurring [Member] Fair Value, Measurements, Recurring [Member] Interest rate and foreign exchange instruments [Member] Interest Rate and Foreign Exchange Contract [Member] Commodity contracts not subject to rate recovery [Member] Commodity contracts subject to rate recovery [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Nuclear decommissioning trusts - equity securities Financial Instruments, Owned, Corporate Equities, at Fair Value Nuclear decommissioning trusts - Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies Financial Instruments, Owned, US Government and Agency Obligations, at Fair Value Nuclear decommissioning trusts - Municipal bonds Financial Instruments, Owned, State and Municipal Government Obligations, at Fair Value Nuclear decommissioning trusts - Other securities Financial Instruments, Owned, Other, at Fair Value Nuclear decommissioning trusts - Total debt securities Fair Value Assets Measured On A Recurring Basis Nuclear Decommissioning Trusts Total Debt Securities Fair value assets measured on a recurring basis nuclear decommissioning trusts, total debt securities. Total nuclear decommissioning trusts Decommissioning Fund Investments, Fair Value Derivative assets Derivative Asset, Fair Value, Gross Asset Effect of netting and allocation of collateral Derivative Asset, Collateral, Obligation to Return Cash, Offset Total Assets Measured at Fair Value Assets, Fair Value Disclosure, Recurring Derivative liabilities Derivative Liability, Fair Value, Gross Liability Effect of netting and allocation of collateral Derivative Liability, Collateral, Right to Reclaim Cash, Offset Total LIabilities Measured at Fair Value Liabilities, Fair Value Disclosure, Recurring Investments [Abstract] Investment [Axis] Investment [Axis] Investment [Domain] Investment [Domain] Sempra Texas Intermediate Holding Company LLC [Member] Sempra Texas Intermediate Holding Company LLC [Member] Sempra Texas Intermediate Holding Company LLC [Member] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Joint Venture [Member] Corporate Joint Venture [Member] Eletrans [Member] Eletrans [Member] Cameron LNG [Member] Cameron LNG [Member] Ownership percentage in consolidated entity Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions Acquired percentage interest Business Acquisition, Percentage of Voting Interests Acquired Consideration Equity Method Investments, Fair Value Disclosure Goodwill Goodwill Equity earnings Investments made during period Payments to Acquire Equity Method Investments Capitalized interest Interest Costs Capitalized Maximum exposure under guarantor obligations Guarantor Obligations, Maximum Exposure, Undiscounted Aggregate carrying value of guarantor obligations Guarantor Obligations, Current Carrying Value Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Document And Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Shares Outstanding Entity Common Stock, Shares Outstanding Entity Central Index Key Entity Central Index Key Trading Symbol Trading Symbol Consolidated Entities [Axis] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Equity Method Investee [Member] Equity Method Investee [Member] Gains (losses) on cash flow hedges to be reclassified from AOCI within 12 months Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months Maximum remaining term of cash flow hedges Maximum Length of Time Hedged in Interest Rate Cash Flow Hedge Variable Interest Entity, Measure of Activity [Abstract] Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Energy Future Holdings Corp Additional Acquisition [Member] Oncor Electric Delivery Company LLC Additional Acquisition [Member] Oncor Electric Delivery Company LLC Additional Acquisition [Member] Sempra Natural Gas [Member] Sempra Natural Gas Segment [Member] Cameron LNG Holdings [Member] Cameron LNG Holdings [Member] Tax Equity Investors [Member] Noncontrolling Tax Equity Investors [Member] Noncontrolling Tax Equity Investors [Member] Variable Interest Entities [Line Items] Variable Interest Entity [Line Items] Conditional purchase obligation Contractual Obligation, Conditional Purchase Obligation Contractual Obligation, Conditional Purchase Obligation Equity of variable interest entity Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net Secured debt of variable interest entity Secured Debt Equity method investment Equity Method Investments Property, plant and equipment, net Equity Stockholders' Equity Attributable to Noncontrolling Interest Other noncontrolling interests Other Noncontrolling Interests Cost of electric fuel and purchased power Utility Operating Revenue, Fuel Utility Operating Revenue, Fuel Total operating expenses Income before income taxes (Losses) income before income taxes/Net (loss) income Earnings attributable to common shares Investments in Unconsolidated Entities Equity Method Investments and Joint Ventures Disclosure [Text Block] Regulatory Matters Public Utilities Disclosure [Text Block] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Line Items] Business Acquisition [Line Items] Assets acquired: Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract] Accounts receivable – other, net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Due from unconsolidated affiliates Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Due From Affiliates Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Due From Affiliates Investment in Oncor Holdings Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Equity method Investments Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Equity method Investments Deferred income tax assets Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Other noncurrent assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Total assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Liabilities assumed: Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract] Other current liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other Pension and other postretirement benefit plan obligations Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Employee Benefit Plan Obligations Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Employee Benefit Plan Obligations Deferred credits and other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Credits and Other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Credits and Other Total liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Net assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Total purchase price Business Combination, Consideration Transferred Schedule of Line of Credit Facilities Schedule of Line of Credit Facilities [Table Text Block] Schedule of Debt Schedule of Debt [Table Text Block] Schedule of Deferred Compensation Arrangement with Individual, Share-based Payments [Table] Schedule of Deferred Compensation Arrangement with Individual, Share-based Payments [Table] IENova Plans [Member] IENova Plans [Member] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Stock options, RSAs and RSUs [Member] Stock options, RSAs and RSUs [Member] Stock options, RSAs and RSUs [Member] RSUs [Member] Restricted Stock Units (RSUs) [Member] Performance-based RSUs [Member] Restricted Stock Units (RSUs), Performance-based [Member] Restricted Stock Units (RSUs), Performance-based [Member] Service-based RSUs [Member] Restricted Stock Units (RSUs), Service-based [Member] Restricted Stock Units (RSUs), Service-based [Member] Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] Net Income/Earnings attributable to common shares Weighted-average common shares outstanding for basic EPS (in shares) Dilutive effect of stock options, RSAs and RSUs (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Dilutive effect of common stock forward shares (in shares) Incremental Common Shares Attributable to Dilutive Effect of Equity Forward Agreements Weighted-average common shares outstanding for diluted EPS (in shares) Vested RSUs included in basic WASO Vested RSUs included in basic WASO Vested restricted stock units included in basic weighted average shares outstanding. Antidilutive securities excluded from earnings per share Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Equity awards, granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period REVENUES Revenue from Contract with Customer [Text Block] Fair Value Measurements Fair Value Disclosures [Text Block] Valuation Technique [Axis] Valuation Technique [Axis] Valuation Technique [Domain] Valuation Technique [Domain] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Restricted cash Accounts receivable – trade, net Accounts Receivable, Net, Current Accounts receivable – other, net Accounts, Notes, Loans and Financing Receivable, Net, Current Due from unconsolidated affiliates Due from Affiliate, Current Income taxes receivable Income Taxes Receivable, Current Inventories Inventory, Net Prepaid expenses Prepaid Expense, Current Regulatory assets Fixed-price contracts and other derivatives Derivative Asset, Current Greenhouse gas allowances Greenhouse Gas Allowances, Current Greenhouse Gas Allowances, Current Assets held for sale Disposal Group, Including Discontinued Operation, Assets, Current Other Other Assets, Current Total current assets Assets, Current Other assets: Assets, Noncurrent [Abstract] Restricted cash Due from unconsolidated affiliates Due from Affiliate, Noncurrent Regulatory assets Investment in Oncor Holdings Other investments Other Investments Other intangible assets Intangible Assets, Net (Excluding Goodwill) Dedicated assets in support of certain benefit plans Deferred income taxes Deferred Income Tax Assets, Net Greenhouse gas allowances Greenhouse Gas Allowances, Noncurrent Greenhouse Gas Allowances, Noncurrent Sundry Other Assets, Noncurrent Total other assets Total Investments And Other Assets Total investments and other assets. Property, plant and equipment: Property, Plant and Equipment, Net [Abstract] Property, plant and equipment Property, Plant and Equipment, Gross Less accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property, plant and equipment, net Total assets LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Short-term debt Short-term Debt Accounts payable – trade Accounts Payable, Trade, Current Accounts payable – other Accounts Payable, Other, Current Due to unconsolidated affiliates Due to Affiliate, Current Dividends and interest payable Interest and Dividends Payable, Current Interest payable Interest Payable, Current Accrued compensation and benefits Employee-related Liabilities, Current Regulatory liabilities Regulatory Liability, Current Accrued franchise fees Other Accrued Liabilities, Current Current portion of long-term debt Long-term Debt and Capital Lease Obligations, Current Asset retirement obligations Asset Retirement Obligation, Current Fixed-price contracts and other derivatives Derivative Liability, Current Customer deposits Customer Deposits, Current Greenhouse gas obligations Greenhouse Gas Obligations, Current Greenhouse Gas Obligations, Current Liabilities held for sale Disposal Group, Including Discontinued Operation, Liabilities, Current Other Other Liabilities, Current Total current liabilities Liabilities, Current Long-term debt Deferred credits and other liabilities: Deferred Credits and Other Liabilities [Abstract] Customer advances for construction Customer Advances for Construction Due to unconsolidated affiliates Due to Affiliate, Noncurrent Pension obligation, net of plan assets Pension obligation, net of plan assets Pension obligation, net of plan assets. Pension and other postretirement benefit plan obligations, net of plan assets Liability, Defined Benefit Plan, Noncurrent Deferred income taxes Deferred Income Tax Liabilities, Net Deferred investment tax credits Accumulated Deferred Investment Tax Credit Regulatory liabilities Regulatory Liability, Noncurrent Asset retirement obligations Asset Retirement Obligations, Noncurrent Fixed-price contracts and other derivatives Derivative Liability, Noncurrent Greenhouse gas obligations Greenhouse Gas Obligations, Noncurrent Greenhouse Gas Obligations, Noncurrent Deferred credits and other Deferred Credits and Other Liabilities Total deferred credits and other liabilities Liabilities, Other than Long-term Debt, Noncurrent Commitments and contingencies (Note 11) Commitments and Contingencies Equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Preferred stock Preferred Stock, Value, Issued Common stock Common Stock, Value, Issued Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income (loss) Total shareholders’ equity Preferred stock of subsidiary Noncontrolling Interest, Amount Represented by Preferred Stock Total equity Total liabilities and equity Liabilities and Equity Inventory Disclosure [Abstract] Inventory, Current [Table] Inventory, Current [Table] Inventory [Line Items] Inventory [Line Items] Natural gas Energy Related Inventory, Natural Gas in Storage LNG Energy Related Inventory, Liquefied Natural Gas Energy related inventory, Liquefied Natural Gas. Materials and supplies Energy Related Inventory, Materials And Supplies Energy related inventory, materials and supplies. Total Public Utilities General Disclosures [Table] Public Utilities General Disclosures [Table] Capital Structure Category [Axis] Capital Structure Category [Axis] Capital Structure [Domain] Capital Structure [Domain] Long Term Debt [Member] Capital Structure, Long Term Debt [Member] Preferred Stock [Member] Capital Structure, Preferred Stock [Member] Common Equity [Member] Capital Structure, Common Equity [Member] Public Utilities, General Disclosures [Line Items] Public Utilities, General Disclosures [Line Items] Authorized weighting Cost Of Capital Authorized Weighting Cost Of Capital Authorized Weighting Return on rate base Cost Of Capital Authorized Rate Of Recovery Cost Of Capital Authorized Rate Of Recovery Weighted return on rate base Cost Of Capital Weighted Authorized Return On Rate Base Cost Of Capital Weighted Authorized Return On Rate Base Return On Rate Base Cost Of Capital Authorized Return On Rate Base Cost Of Capital Authorized Return On Rate Base Cost of debt Public Utilities, Approved Debt Capital Structure, Percentage Difference between current cost of capital and proposed cost of capital Public Utilities, Approved Debt Capital Structure, Change, Percentage Public Utilities, Approved Debt Capital Structure, Change, Percentage Difference between current return on rate base and proposed return on rate base Cost Of Capital Authorized Return On Rate Base, Change, Percentage Cost Of Capital Authorized Return On Rate Base, Change, Percentage Schedule Of Nuclear Insurance Amounts [Table] Schedule Of Nuclear Insurance Amounts [Table] Schedule Of Nuclear Insurance [Line Items] Schedule Of Nuclear Insurance [Line Items] Maximum nuclear liability insurance coverage Nuclear Liability Insurance Coverage, Maximum Maximum secondary financial protection Secondary Financial Protection, Maximum Annual maximum secondary financial protection contribution by company Secondary Financial Protection, Company Contribution, Annual Maximum Federal nuclear property damage insurance, minimum required Federal nuclear property damage insurance, minimum required Federal nuclear property damage insurance, minimum required Nuclear property damage insurance Federal Nuclear Property Damage Insurance Federal Nuclear Property Damage Insurance Spent nuclear fuel storage insurance Spent Nuclear Fuel Storage Insurance Spent Nuclear Fuel Storage Insurance Maximum premium assessment under nuclear property damage insurance Nuclear Property Damage Insurance, Premium Assessment Maximum nuclear property insurance terrorism coverage Nuclear Property Insurance Terrorism Coverage, Maximum Business Acquisition, Results of Operations Business Acquisition, Results of Operations [Table Text Block] Business Acquisition, Results of Operations [Table Text Block] Public Utilities, General Disclosures [Abstract] Schedule of Nuclear Decommissioning Trusts Investments Available-for-sale Securities [Table Text Block] Schedule of Sales of Securities By Nuclear Decommissioning Trusts Securities Owned Not Readily Marketable [Table Text Block] Net liability position for derivatives with credit limits Derivative, Net Liability Position, Aggregate Fair Value Additional collateral that wil be required if credit rating falls below investment grade Additional Collateral, Aggregate Fair Value Noncontrolling Interest [Abstract] Noncontrolling Interest [Table] Noncontrolling Interest [Table] Subsidiaries [Member] Subsidiaries [Member] Solar Power Projects [Member] Solar Power Projects [Member] Solar Power Projects [Member] Chilquinta Energía subsidiaries [Member] Ownership Interests Held By Others, Chilquinta Energia [Member] Luz del Sur [Member] Ownership Interests Held By Others, Luz Del Sur [Member] Tecsur [Member] Ownership Interests Held By Others, Tecsur [Member] IEnova [Member] Ownership Interests Held By Others IEnova [Member] Tax equity arrangement – wind [Member] Noncontrolling Tax Equity Investors, Wind [Member] Noncontrolling Tax Equity Investors, Wind [Member] Tax equity arrangement – solar [Member] Noncontrolling Tax Equity Investors, Solar [Member] Noncontrolling Tax Equity Investors, Solar [Member] Bay Gas Storage Company, Ltd. [Member] Ownership Interests Held By Others, Bay Gas Storage Company [Member] Liberty Gas Storage, LLC [Member] Ownership Interests Held By Others, Liberty Gas Storage [Member] Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Percent ownership held by noncontrolling interests Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Noncontrolling interests Number of subsidiaries with noncontrolling interests Number of Subsidiaries with Noncontrolling Interests Number of Subsidiaries with Noncontrolling Interests Number of facilities acquired Number of Facilities Acquired Number of Facilities Acquired GENERAL INFORMATION AND OTHER FINANCIAL DATA Additional Financial Information Disclosure [Text Block] NEW ACCOUNTING STANDARDS New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Statement of Comprehensive Income [Abstract] Other Comprehensive Income Location [Axis] Other Comprehensive Income Location [Axis] Other Comprehensive Income Location [Domain] Other Comprehensive Income Location [Domain] Pretax amount [Member] Before-Tax Amount [Member] Income tax (expense) benefit [Member] Income Tax (Expense) Benefit [Member] Net-of-tax amount [Member] Net-of-Tax Amount [Member] Noncontrolling Interests (after-tax) [Member] Total [Member] Total Equity [Member] Net income (loss) Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Financial instruments Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax Pension and other postretirement benefits Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Total other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Comprehensive income (loss) Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenues to be recognized Revenue, Remaining Performance Obligation Revenues to be recognized, period of recognition Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Related Party Transactions [Abstract] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Revenue from related parties Revenue from Related Parties Costs of sales to related parties Costs and Expenses, Related Party Principles of Consolidation Consolidation, Policy [Policy Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Variable Interest Entity Policy Consolidation, Variable Interest Entity, Policy [Policy Text Block] Earnings Per Share Policy Earnings Per Share, Policy [Policy Text Block] Interim period effective tax rate policy Income Taxes, Interim Period Effective Tax Rate Policy [Policy Text Block] Income Taxes, Interim Period Effective Tax Rate Policy Flow-through rate-making treatment tax policy Regulatory Income Taxes, Policy [Policy Text Block] Derivatives Policy Derivatives, Policy [Policy Text Block] Fair Value Measurement Policy Fair Value Measurement, Policy [Policy Text Block] Segment Policy Segment Reporting, Policy [Policy Text Block] Legal Costs Policy Legal Costs, Policy [Policy Text Block] New Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Other Revenue Revenue from Contract with Customer [Policy Text Block] Revenue from Contract with Customer [Policy Text Block] Revenue from Contracts With Customers Revenue Recognition, Policy [Policy Text Block] Schedule of Auction Price Inputs [Table Text Block] Schedule of Auction Price Inputs [Table Text Block] Schedule of Auction Price Inputs [Table Text Block] Recurring Fair Value Measures Table Fair Value, Assets Measured on Recurring Basis [Table Text Block] Recurring Fair Value Measures Level 3 Rollforward Table Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Fair Value of Financial Instruments Table Fair Value, by Balance Sheet Grouping [Table Text Block] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Fisterra Midstream Mexico [Member] Fisterra Midstream Mexico [Member] Fisterra Midstream Mexico [Member] Oncor Electric Delivery Company LLC Additional Acquisition [Member] Texas Transmission Investment LLC [Member] Texas Transmission Investment LLC [Member] Texas Transmission Investment LLC [Member] Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] Cash paid, net of cash and cash equivalents acquired Proceeds from Issuance of Debt and Equity Proceeds from Issuance of Debt and Equity Proceeds from Issuance of Debt and Equity Cash consideration Payments to Acquire Businesses, Gross Commitment to Invest Commitment to Invest Commitment to Invest Consideration Adjustment for dividends Business Combination, Consideration Transferred, Other Transaction costs incurred Business Acquisition, Transaction Costs Ownership percentage held by noncontrolling owners Weighted average maturity Line of Credit facility, Weighted Average Term Line of Credit facility, Weighted Average Term Weighted average interest rate Debt, Weighted Average Interest Rate Due to/from Other affiliates [Member] Affiliate Of Investee [Member] ESJ joint venture [Member] ESJ joint venture [Member] TAG Pipeline Norte [Member] TAG Pipeline Norte [Member] TAG Pipeline Norte [Member] Due to/from Sempra Energy [Member] Majority Shareholder [Member] Due to/from SoCalGas [Member] Subsdiary Of Common Parent So Cal Gas [Member] Due to/from SDG&E [Member] Subsidiary Of Common Parent S D G E [Member] Interbank Equilibrium Rate [Member] Interbank Equilibrium Rate [Member] Interbank Equilibrium Rate [Member] Due from unconsolidated affiliates - current Due from unconsolidated affiliates - noncurrent Due to unconsolidated affiliates, current Due to Affiliate, Noncurrent Income taxes due (to) from Sempra Energy Related Party Tax Expense, Due To (From) Affiliates, Current Related Party Tax Expense, Due To (From) Affiliates, Current Interest rate on due from affiliate, noncurrent Related Party Transaction, Rate Segment Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Contract with Customer, Asset [Table] Contract with Customer, Asset [Table] Contract with Customer, Asset [Table] Accounts receivable – trade, net [Member] Trade Accounts Receivable [Member] Accounts receivable – other, net [Member] Accounts Receivable, Other, Net [Member] Accounts Receivable, Other, Net [Member] Due from unconsolidated affiliates – current [Member] Due From Related Parties, Current [Member] Due From Related Parties, Current [Member] Contract with Customer, Asset [Line Items] Contract with Customer, Asset [Line Items] [Line Items] for Contract with Customer, Asset [Table] Receivables from revenues from contracts with customers Contract with Customer, Asset, Net Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Retirement Plan Type [Axis] Retirement Plan Type [Axis] Retirement Plan Type [Domain] Retirement Plan Type [Domain] Pension benefits [Member] Pension Plan [Member] Other postretirement benefits [Member] Other Postretirement Benefits Plan [Member] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Increase in liability due to acquisition Defined Benefit Plan, Benefit Obligation, Business Combination Reduction in plan assets due to settlement Defined Benefit Plan, Plan Assets, Payment for Settlement Service cost Defined Benefit Plan, Service Cost Interest cost Defined Benefit Plan, Interest Cost Expected return on assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Prior service cost (credit) Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Actuarial loss (gain) Defined Benefit Plan, Amortization of Gain (Loss) Settlements Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement Net periodic benefit cost (credit) Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Regulatory adjustment Increase (Decrease) in Other Regulatory Assets Total expense recognized Defined Benefit Plan, Expense Defined Benefit Plan, Expense Contributions by employer Defined Benefit Plan, Plan Assets, Contributions by Employer Expected contributions in current fiscal year Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year San Onofre Nuclear Generating Station (SONGS) Offering costs Payment of Financing and Stock Issuance Costs Schedule of Recognized Identified Assets Acquired and Liabilities Assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Schedule Of Assets Held for Sale and Deconsolidation of Subsidiaries Table Disposal Groups, Including Discontinued Operations [Table Text Block]