Organization, Consolidation and Presentation of Financial Statements [Abstract] 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] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] San Diego Gas and Electric Company [Member] San Diego Gas and Electric Company [Member] Southern California Gas Company [Member] Southern California Gas Company [Member] Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items] Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items] Income tax expense (benefit) from continuing operations Income Tax Expense (Benefit) Income (loss) from continuing operations before income taxes and equity earnings Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Equity earnings (losses), before income tax Income (Loss) from Equity Method Investments Pretax income (loss) Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Income tax benefit for release of a regulatory liability Tax Cuts and Jobs Act of 2017, Change in Tax Rate, Deferred Tax Assets and Liabilities, Income Tax (Expense) Benefit, Recognized in Period Tax Cuts and Jobs Act of 2017, Change in Tax Rate, Deferred Tax Assets and Liabilities, Income Tax (Expense) Benefit, Recognized in Period Income tax expense (benefit) related to outside basis differences existing prior to the January 25, 2019 approval of our plan to sell our South American businesses Income Tax Expense (Benefit), Discontinued Operations, Outside Basis Difference Prior To Plan Income Tax Expense (Benefit), Discontinued Operations, Outside Basis Difference Prior To Plan Income tax expense related to the increase in outside basis differences from 2019 earnings since January 25, 2019 Income Tax Expense (Benefit), Discontinued Operations, Outside Basis Difference After To Plan Income Tax Expense (Benefit), Discontinued Operations, Outside Basis Difference After To Plan Other Income, Nonoperating [Abstract] Other Income [Table] Other Income [Table] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Sempra Mexico [Member] Sempra Mexico [Member] 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 (Losses) gains on interest rate and foreign exchange instruments, net Unrealized Gain (Loss) on Derivatives Foreign currency transaction gains (losses), net Foreign Currency Transaction Gain (Loss), Realized Non-service component of net periodic benefit (cost) credit Defined Benefit Plan, Net Periodic Benefit Cost (Credit). 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[Member] Compania Transmisora del Norte Grande S.A. [Member] Compania Transmisora del Norte Grande S.A. [Member] Sempra South American Utilities [Member] Sempra South American Utilities [Member] Sempra Texas Intermediate Holding Company LLC [Member] Sempra Texas Intermediate Holding Company LLC [Member] Sempra Texas Intermediate Holding Company LLC [Member] Oncor Electric Delivery Company LLC. [Member] Oncor Electric Delivery Company LLC. [Member] Oncor Electric Delivery Company LLC. [Member] Texas Transmission Investment LLC [Member] Texas Transmission Investment LLC [Member] Texas Transmission Investment LLC [Member] Ownership [Axis] Ownership [Axis] Ownership [Domain] Ownership [Domain] Sharyland Utilities [Member] Sharyland Utilities [Member] Sharyland Utilities [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] 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 Cash consideration Payments to Acquire Businesses, Gross Adjustment for dividends Business Combination, Consideration Transferred, Other Ownership percentage held by noncontrolling owners Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Consideration Business Combination, Consideration Transferred Acquisition price per share acquired Business Acquisition, Share Price Management agreement termination fee paid Management Agreement Termination Fee Management Agreement Termination Fee Debt assumed Noncash or Part Noncash Acquisition, Debt Assumed Repayments of assumed debt Repayments of Assumed Debt Repayments of secured debt Repayments of Secured Debt Capital contributions Payments to Acquire Interest in Subsidiaries and Affiliates Cash acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative [Table] Derivative [Table] Hedging Relationship [Axis] Hedging Relationship [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Cash Flow Hedging [Member] Cash Flow Hedging [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Interest Rate Contract [Member] Interest Rate Contract [Member] Interest rate and foreign exchange instruments [Member] Cross Currency Interest Rate Contract [Member] Foreign Exchange [Member] Foreign Exchange [Member] Derivative [Line Items] Derivative [Line Items] Notional amount of derivative Derivative Liability, Notional Amount Noncontrolling Interest [Abstract] Noncontrolling Interest [Table] Noncontrolling Interest [Table] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Discontinued Operations, Held-for-sale [Member] Discontinued Operations, Held-for-sale [Member] Otay Mesa VIE [Member] Ownership Interests Held By Others, Otay Mesa VIE [Member] IEnova [Member] Ownership Interests Held By Others IEnova [Member] IEnova subsidiaries [Member] Ownership Interests Held By Others, IEnova, Subsidiary One [Member] Ownership Interests Held By Others, IEnova, Subsidiary One [Member] Tax equity arrangement – wind [Member] Noncontrolling Tax Equity Investors, Wind [Member] Noncontrolling Tax Equity Investors, Wind [Member] PXISE Energy Solutions LLC [Member] PXISE Energy Solutions LLC [Member] PXISE Energy Solutions LLC [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] ECA LNG Proposed Liquefaction Project [Member] Ownership Interests Held By Others, ECS LNG Liquefaction Project [Member] Ownership Interests Held By Others, ECS LNG Liquefaction Project [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] Sempra Renewables [Member] Sempra Renewables Segment [Member] Sempra LNG [Member] Sempra LNG & Midstream [Member] Sempra LNG & Midstream [Member] Parent and Other [Member] Corporate and Other [Member] Statistical Measurement [Axis] Statistical Measurement [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Percent ownership held by noncontrolling interests Other noncontrolling interests Other Noncontrolling Interests 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] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Interest Expense [Member] Interest Expense [Member] Other (Expense) Income, Net [Member] Other Income [Member] Gain (Loss) On Sale Of Assets [Member] Gain (Loss) On Sale Of Assets [Member] Gain (Loss) On Sale Of Assets [Member] Equity Earnings [Member] Equity Earnings Net Of Income Tax [Member] Revenues: Energy-Related Businesses [Member] Sales [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] Foreign Exchange Instruments [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] Pretax (loss) gain recognized in OCI Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax Pretax (loss) gain reclassified from AOCI into earnings Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Pretax (loss) gain on derivatives recognized in earnings Derivative, Gain (Loss) on Derivative, Net Statement of Comprehensive Income [Abstract] Statement [Table] Statement [Table] 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] Noncontrolling Interest [Member] Total [Member] Total Equity [Member] Statement [Line Items] Statement [Line Items] Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest 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 (loss) income Other Comprehensive Income (Loss), Net of Tax Comprehensive income Total Comprehensive Income Before Preferred Stock Dividend Requirements Total comprehensive income before preferred stock dividend requirements. 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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] Accumulated Net Gain (Loss) from 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] Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] Accumulated Defined Benefit Plans Adjustment, Net Settlements Attributable to Parent [Member] Accumulated Defined Benefit Plans Adjustment, Net Settlements Attributable 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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] GRC retroactive impacts [Member] GRC retroactive impacts [Member] GRC retroactive impacts [Member] Regulatory Balancing Accounts, Other balancing accounts [Member] Regulatory Balancing Accounts, Other [Member] Regulatory Balancing Accounts, Other [Member] Other regulatory (liabilities) assets [Member] Other Regulatory Assets (Liabilities) [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] 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 Loss Contingencies [Table] Loss Contingencies [Table] Wildfire Fund [Member] Wildfire Fund [Member] Wildfire Fund [Member] PG&E [Member] PG&E [Member] PG&E [Member] Edison [Member] Edison [Member] Edison [Member] SDG&E and Edison [Member] SDG&E and Edison [Member] SDG&E and Edison [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Fire risk mitigation capital improvements Capital Improvement, Fire Risk Mitigation Capital Improvement, Fire Risk Mitigation Wildfire fund, threshold amount to seek payment Wildfire Fund, Threshold Amount To Seek Payment Wildfire Fund, Threshold Amount To Seek Payment Wildfire fund, threshold percentage of equity portion of electric transmission and distribution rate base Wildfire Fund, Maximum Claim Reimbursement, Threshold Percentage Of Equity Portion Of Electric Transmission And Distribution Rate Base Wildfire Fund, Maximum Claim Reimbursement, Threshold Percentage Of Equity Portion Of Electric Transmission And Distribution Rate Base initial liability cap Wildfire Fund, Maximum Claim Reimbursement Wildfire Fund, Maximum Claim Reimbursement Potential initial funded amount by loan Loss Contingency, Loss Contingency, Liquidity Fund, Maximum Borrowing Capacity Loss Contingency, Loss Contingency, Liquidity Fund, Maximum Borrowing Capacity Loan proceeds received Loss Contingency, Loss Contingency, Liquidity Fund, Process From Loans Loss Contingency, Loss Contingency, Liquidity Fund, Process From Loans Initial shareholder contributions Loss Contingency, Initial Shareholder Contributions Loss Contingency, Initial Shareholder Contributions Aggregate value of annual shareholder contributions Loss Contingency, Additional Annual Contributions, Aggregate Value Loss Contingency, Additional Annual Contributions, Aggregate Value Total Shareholder Contribution Loss Contingency, Total Shareholder Contribution Loss Contingency, Total Shareholder Contribution Period of annual contributions Loss Contingency, Period of Annual Contributions Loss Contingency, Period of Annual Contributions Wildfire Fund asset Prepaid Insurance Fund Asset Prepaid Insurance Fund Asset Current portion of the Wildfire Fund asset Prepaid Insurance Fund Asset, Current Prepaid Insurance Fund Asset, Current Estimated period of benefit Amortization of Prepaid Insurance Fund Asset Amortization of Prepaid Insurance Fund Asset Noncurrent portion of the Wildfire Fund asset Prepaid Insurance Fund Asset, Noncurrent Prepaid Insurance Fund Asset, Noncurrent Wildfire Fund obligation Prepaid Insurance Fund, Liability Prepaid Insurance Fund, Liability Additional annual contributions Loss Contingency, Additional Annual Contributions Loss Contingency, Additional Annual Contributions Wildfire Fund obligation in other current liabilities Prepaid Insurance Fund Liability, Current Liabilities Prepaid Insurance Fund Liability, Current Liabilities Wildfire Fund obligation in deferred credits and other Prepaid Insurance Fund Liability, Noncurrent Liabilities Prepaid Insurance Fund Liability, Noncurrent Liabilities Related Party Transactions [Abstract] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Sempra Mexico [Member] Sempra Mexico Segment [Member] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] ESJ joint venture [Member] ESJ joint venture [Member] TAG Pipeline Norte [Member] TAG Pipeline Norte [Member] TAG Pipeline Norte [Member] Due to/from SoCalGas [Member] Subsdiary Of Common Parent So Cal Gas [Member] Due to/from Sempra Energy [Member] Majority Shareholder [Member] Due to/from Other affiliates [Member] Affiliate Of Investee [Member] Due to/from SDG&E Subsidiary Of Common Parent S D G E [Member] Pacific Enterprises [Member] Pacific Enterprises [Member] Pacific Enterprises [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Interbank Equilibrium Rate [Member] Interbank Equilibrium Rate [Member] Interbank Equilibrium Rate [Member] LIBOR [Member] London Interbank Offered Rate (LIBOR) [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Due from unconsolidated affiliates - current Due from Affiliate, Current Due from unconsolidated affiliates - noncurrent Due from Affiliate, Noncurrent Due to unconsolidated affiliates, current Due to Affiliate, Current Due to unconsolidated affiliates - noncurrent 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 Spread on variable rate Debt Instrument, Basis Spread on Variable Rate Interest rate on due from affiliate, noncurrent Related Party Transaction, Rate Advances to Affiliate Advances to Affiliate Revenue from related parties Revenue from Related Parties Costs of sales to related parties Costs and Expenses, Related Party Variable Interest Entity, Measure of Activity [Abstract] Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Otay Mesa VIE [Member] Otay Mesa VIE [Member] Oncor Holdings [Member] Sempra Texas Utilities [Member] Sempra Texas Utilities [Member] Sempra Texas Utilities [Member] Sempra Natural Gas [Member] Sempra Natural Gas Segment [Member] Cameron LNG Holdings [Member] Cameron LNG Holdings [Member] Variable Interest Entity, Not Primary Beneficiary Variable Interest Entity, Not Primary Beneficiary [Member] Variable Interest Entity, Primary Beneficiary Variable Interest Entity, Primary Beneficiary [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] Generating capacity Power Plant, Energy Generating Capacity Power Plant, Energy Generating Capacity Conditional purchase obligation Contractual Obligation, Conditional Purchase Obligation Contractual Obligation, Conditional Purchase Obligation Gain recognized upon deconsolidation Deconsolidation, Gain (Loss), Amount Cash and cash equivalents Accounts receivable, net Receivables, Net, Current Inventories Inventory, Net Total current assets Assets, Current Other noncurrent assets Other Assets, Noncurrent Total assets Assets Accounts payable Accounts Payable, Current Other Other Liabilities, Current Total current liabilities Liabilities, Current Asset retirement obligations Asset Retirement Obligation Deferred credits and other Deferred Credits and Other Liabilities Asset Retirement Obligations And Deferred Credits And Other Liabilities Asset Retirement Obligations And Deferred Credits And Other Liabilities Asset Retirement Obligations And Deferred Credits And Other Liabilities Total liabilities and equity Liabilities and Equity Equity of variable interest entity Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net Cost of electric fuel and purchased power Utility Operating Revenue, Fuel Utility Operating Revenue, Fuel Operation and maintenance Utilities Operating Expense, Maintenance and Operations Depreciation and amortization Utilities Operating Expense, Depreciation and Amortization Total operating expenses Operating Expenses Operating income Operating Income (Loss) Operation and maintenance Other Cost and Expense, Operating Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Income tax expense Net income Earnings attributable to noncontrolling interests Equity method investment Equity Method Investments Equity Stockholders' Equity Attributable to Noncontrolling Interest Assets of VIEs Variable Interest Entity, Consolidated, Carrying Amount, Assets R B S Sempra Commodities [Member] R B S Sempra Commodities [Member] Plaintiffs [Member] Plaintiffs [Member] Plaintiffs [Member] Energy Future Holdings Corp. [Member] Energy Future Holdings Corp. [Member] Energy Future Holdings Corp. [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] HMRC VAT Claim [Member] HMRC VAT Claim [Member] VAT tax claim paid upon appeal VAT Tax Claim Amount VAT Tax Claim Amount. Filed claims amount Loss Contingency, Damages Sought, Value Investment in RBS Sempra Commodities LLP Investment In Joint Venture Investment in RBS Sempra Commodities LLP. Number of lawsuits Loss Contingency, Pending Claims, Number Number of lawsuits filed Loss Contingency, New Claims Filed, Number Number of proof of claims Loss Contingency, Proof of Claims, Number Loss Contingency, Proof of Claims, Number 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] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2016-02 [Member] Accounting Standards Update 2016-02 [Member] Accounting Standards Update 2018-02 [Member] Accounting Standards Update 2018-02 [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Assets held for sale Assets Held-for-sale, Not Part of Disposal Group, Current Sundry Other Assets, Current Right-of-use assets – operating leases Operating Lease, Right-of-Use Asset Deferred income tax assets Deferred Income Tax Assets, Net Other current liabilities Long-term debt Long-term Debt, Excluding Current Maturities Retained earnings Retained Earnings (Accumulated Deficit) Regulatory liabilities Regulatory Liability, Noncurrent Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax 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 Maximum nuclear liability loss coverage per incident Secondary Financial Protection, Company Contribution, Annual Maximum 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 Federal nuclear property damage insurance, minimum required Federal nuclear property damage insurance, minimum required Federal nuclear property damage insurance, minimum required 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 Fair Value Disclosures [Abstract] 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 and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [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] 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 Unamortized discount (net of premium) and debt issuance costs Unamortized Discount and Debt Issuance Costs Unamortized Discount and Debt Issuance Costs Finance lease obligations Finance Lease, Liability Build-to-suit and capital lease obligations Capital Lease Obligations and Build-To-Suit Capital Lease Obligations and Build-To-Suit Capital lease obligations Capital Lease Obligations Business Acquisition, Results of Operations Business Acquisition, Results of Operations [Table Text Block] Business Acquisition, Results of Operations [Table Text Block] Schedule of General Rate Case [Table] Schedule of General Rate Case [Table] Capital Structure Category [Axis] Capital Structure Category [Axis] Capital Structure [Domain] Capital Structure [Domain] Common Equity [Member] Capital Structure, Common Equity [Member] General Rate Case Plan [Axis] General Rate Case Plan [Axis] General Rate Case Plan [Axis] General Rate Case Plan [Domain] General Rate Case Plan [Domain] [Domain] for General Rate Case Plan [Axis] 2019 GRC FD [Member] 2019 GRC FD [Member] 2019 GRC FD [Member] Scenario [Axis] Scenario [Axis] Scenario [Domain] Scenario [Domain] Forecast [Member] Forecast [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 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expense liability Liability Associated With Tracked Income Tax Expense Differences Liability Associated With Tracked Income Tax Expense Differences Regulatory liability Regulatory Liability Regulatory Liability. General Rate Case, Retroactive Impact, Incremental Earnings General Rate Case, Retroactive Impact, Incremental Earnings General Rate Case, Retroactive Impact, Incremental Earnings General Rate Case, Retroactive Impact, Incremental Earnings, Net Of Tax General Rate Case, Retroactive Impact, Incremental Earnings, Net Of Tax General Rate Case, Retroactive Impact, Incremental Earnings, Net Of Tax Operating activities: Cash Flow, Operating Activities, Lessee [Abstract] Cash paid for operating leases Operating Lease, Payments Cash paid for finance leases - operating Finance Lease, Interest Payment on Liability Financing activities: Cash Flow, Financing Activities, Lessee [Abstract] Cash paid for finance leases - financing Finance Lease, Principal Payments Increase in operating lease obligations for right-of-use assets Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Increase in finance lease obligations for investment in PP&E Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Authorized Components [Axis] Authorized Components [Axis] Authorized Components [Axis] Authorized Components [Domain] Authorized Components [Domain] [Domain] for Authorized Components [Axis] O&M [Member] O&M [Member] O&M [Member] Capital-related Costs [Member] Capital-related Costs [Member] Capital-related Costs [Member] 2020 GRC FD [Member] 2020 GRC FD [Member] 2020 GRC FD [Member] 2021 GRC FD [Member] 2021 GRC FD [Member] 2021 GRC FD [Member] San Onofre Nuclear Generating Station Public Utilities Disclosure [Text Block] Equity [Abstract] Series A Preferred Stock [Member] Series A Preferred Stock [Member] Series B Preferred Stock [Member] Series B Preferred Stock [Member] Dividends declared per share of preferred stock (in dollars per share) Preferred Stock, Dividends Per Share, Declared Dividends declared per share of common stock (in dollars per share) Common Stock, Dividends, Per Share, Declared 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, Amount Revenues to be recognized, period of recognition Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Income Statement [Abstract] Natural gas [Member] Natural Gas, US Regulated [Member] Electric fuel and purchased power [Member] Electricity, US Regulated [Member] Energy-related businesses [Member] Natural Gas and Electricity, US Regulated [Member] Natural Gas and Electricity, US Regulated [Member] REVENUES Regulated and Unregulated Operating Revenue [Abstract] Electric Regulated Operating Revenue, Electric, Non-Nuclear Natural gas Regulated Operating Revenue, Gas Utilities operating revenue Regulated Operating Revenue Operating expenses Operating Expenses [Abstract] Operating expenses Cost of Goods and Services Sold Franchise fees and other taxes Taxes, Other 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 Franchise fees and other taxes Utilities Operating Expense, Taxes Impairment losses Other Asset Impairment Charges Total operating expenses Utilities Operating Expense Operating income Other (expense) income, net Interest income Investment Income, Interest Income from continuing operations, net of income tax Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Income from discontinued operations, net of income tax Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Preferred dividends Dividends, Preferred Stock Mandatory convertible preferred stock dividends Preferred Stock Dividends, Income Statement Impact Preferred dividends of subsidiary Preferred Stock Dividends and Other Adjustments Earnings attributable to common shares Net Income (Loss) Available to Common Stockholders, Basic Basic earnings (losses) per common share: Earnings Per Share, Basic [Abstract] Earnings (losses) from continuing operations attributable to common shares (in usd per share) Income (Loss) from Continuing Operations, Per Basic Share Earnings from discontinued operations attributable to common shares (in usd per share) Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic Share Earnings attributable to common shares (in usd per share) Earnings Per Share, Basic Weighted-average common shares outstanding Weighted Average Number of Shares Outstanding, Basic Diluted earnings (losses) per common share: Earnings Per Share, Diluted [Abstract] Earnings (losses) from continuing operations attributable to common shares (in usd per share) Income (Loss) from Continuing Operations, Per Diluted Share Earnings from discontinued operations attributable to common shares (in usd per share) Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share Earnings from continuing operations attributable to common shares (n usd per share) Earnings Per Share, Diluted Weighted-average common share outstanding, diluted Weighted Average Number of Shares Outstanding, Diluted OMEC LLC [Member] OMEC LLC [Member] OMEC LLC [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] Liquefied Natural Gas Contracts [Member] Liquefied Natural Gas Contracts [Member] Purchased-Power Contracts [Member] Purchased-Power Contracts [Member] Purchased-Power Contracts [Member] Change in 2019 Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Remainder of Fiscal Year Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Remainder of Fiscal Year Change in 2020 Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Year Two Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Year Two Change in 2021 Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Year Three Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Year Three Change in 2022 Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Year Four Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Year Four Change in 2023 Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Year Five Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Year Five Change thereafter Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, After Five Years Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, After Five Years Increase purchase-power contracts Increase (Decrease) in Unrecorded Unconditional Purchase Obligation Increase (Decrease) in Unrecorded Unconditional Purchase Obligation Schedule of New Accounting Pronouncements and Changes in Accounting Principles Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table 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] Schedule of Deferred Compensation Arrangement with Individual, Share-based Payments [Table] Schedule of Deferred Compensation Arrangement with Individual, Share-based Payments [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Stock Options and RSUs [Member] Stock Options and RSUs [Member] Stock Options and RSUs [Member] Common Stock [Member] Common Stock [Member] Stock options, RSAs and RSUs [Member] Stock options, RSAs and RSUs [Member] Stock options, RSAs and RSUs [Member] Award Type [Axis] Award Type [Axis] Award Type [Domain] Award Type [Domain] Common Stock Forward Sales [Member] Common Stock Forward Sales [Member] Common Stock Forward Sales [Member] Share-based Payment Arrangement, Option [Member] Share-based Payment Arrangement, Option [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] Convertible Preferred Stock [Member] Convertible Preferred Stock [Member] Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] Income from continuing operations, net of income tax (Earnings) losses attributable to noncontrolling interests Income (Loss) from Continuing Operations, Net of Tax, Attributable to Noncontrolling Interest Mandatory convertible preferred stock dividends Preferred dividends of subsidiary Earnings (losses) from continuing operations attributable to common shares for basic EPS Income (Loss) From Continuing Operations, Net Of Tax, Including Portion Attributable To Noncontrolling Interest, Before Preferred Stock Dividend Income (Loss) From Continuing Operations, Net Of Tax, Including Portion Attributable To Noncontrolling Interest, Before Preferred Stock Dividend Earnings (losses) from continuing operations attributable to common shares for diluted EPS Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Earnings attributable to noncontrolling interests Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Noncontrolling Interest Earnings from discontinued operations attributable to common shares Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Earnings attributable to common shares for basic EPS Add back dividends for dilutive mandatory convertible preferred stock Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities Earnings attributable to common shares Net Income (Loss) Available to Common Stockholders, Diluted Weighted-average common shares outstanding for basic EPS 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 Dilutive effect of mandatory convertible preferred stock (in shares) Incremental Common Shares Attributable to Dilutive Effect of Conversion of Preferred Stock Weighted-average common shares outstanding for diluted EPS (in shares) Vested RSUs included in basic WASO (in shares) Vested RSUs included in basic WASO Vested restricted stock units included in basic weighted average shares outstanding. Antidilutive securities excluded from earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Exercisable period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Non-qualified stock options granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Equity awards, granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] NEW ACCOUNTING STANDARDS New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Wind Investments [Member] Wind Investments [Member] Wind Investments [Member] Corporate Joint Venture [Member] Corporate Joint Venture [Member] Cameron LNG [Member] Cameron LNG [Member] Contribution Other Ownership Interests, Contributed Capital Commitment to invest Commitment to Invest Commitment to Invest Dividends Dividends Tax sharing payments Payments To Tax Sharing Arrangements Payments To Tax Sharing Arrangements Investments made during period Payments to Acquire Equity Method Investments Other-than-temporary impairment Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net Capitalized interest Interest Costs Capitalized Equity earnings (losses), before income tax: Maximum exposure under guarantor obligations Guarantor Obligations, Maximum Exposure, Undiscounted Public Utilities General Disclosures [Table] Public Utilities General Disclosures [Table] Public Utilities, General Disclosures [Line Items] Public Utilities, General Disclosures [Line Items] FERC Requirement To Maintain Common Equity Ratio At Or Above FERC Requirement To Maintain Common Equity Ratio At Or Above FERC Requirement To Maintain Common Equity Ratio At Or Above Base ROE FERC Requirement To Maintain Common Equity Ratio At Or Above, Base FERC Requirement To Maintain Common Equity Ratio At Or Above, Base Additional Bps FERC Requirement To Maintain Common Equity Ratio At Or Above, Additional Basis Spread FERC Requirement To Maintain Common Equity Ratio At Or Above, Additional Basis Spread Additional FERC revenues FERC, Revenue Requirement FERC, Revenue Requirement Penalties related to billing practices OII Penalties related to billing practives, payable to general fund Penalties Payable Penalties Payable Total amount penalties credited to customers Penalties Credited to Customers Penalties Credited to Customers Number of days that customers bills were delayed Days Customers Bills Were Delayed Days Customers Bills Were Delayed Penalty credit per customer Penalty Credit Per Customer Penalty Credit Per Customer 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. Statement of Cash Flows [Abstract] Preferred stock [Member] Preferred Stock [Member] CASH FLOWS FROM OPERATING ACTIVITIES Net Cash Provided by (Used in) Operating Activities [Abstract] Less: Income from discontinued operations, net of income tax 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 Impairment losses Gain on sale of assets Equity earnings Income (Loss) from Equity Method Investments, Net of Dividends or Distributions Share-based compensation expense Share-based Payment Arrangement, Noncash Expense Fixed-price contracts and other derivatives Other Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities Intercompany activities with discontinued operations, net Increase (Decrease) in Intercompany Activities with Discontinued Operations Net, Operating Activities Increase (Decrease) in Intercompany Activities with Discontinued Operations Net, 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 Wildfire fund, current and noncurrent Increase (Decrease) In Prepaid Insurance Fund Asset Increase (Decrease) In Prepaid Insurance Fund Asset Changes in other noncurrent assets and liabilities, net Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net Net cash provided by continuing operations Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash provided by discontinued operations Cash Provided by (Used in) Operating Activities, Discontinued Operations 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 property, plant and equipment Payments to Acquire Productive Assets Expenditures for investments and acquisition Payments to Acquire Investments Proceeds from sale of assets Proceeds from Sale of Productive Assets Decrease in cash from deconsolidation of Otay Mesa VIE Cash Divested from Deconsolidation Purchases of nuclear decommissioning trust assets Payments to Acquire Investments to be Held in Decommissioning Trust Fund Proceeds from sales of nuclear decommissioning trust assets Proceeds from Decommissioning Trust Fund Assets Increase in loans to affiliate, net Origination of Notes Receivable from Related Parties 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 Intercompany activities with discontinued operations, net Increase (Decrease) in Intercompany Activities with Discontinued Operations Net, Investing Activities Increase (Decrease) in Intercompany Activities with Discontinued Operations Net, Investing Activities Other Payments for (Proceeds from) Other Investing Activities Net cash used in continuing operations Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash used in discontinued operations Cash Provided by (Used in) Investing Activities, Discontinued Operations 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] Equity contribution from Sempra Energy Proceeds from Contributed Capital Common dividends paid Payments of Ordinary Dividends, Common Stock Preferred dividends paid Payments of Ordinary Dividends, Preferred Stock and Preference Stock Preferred dividends paid by subsidiary Subsidiary Payments of Ordinary Dividends, Preferred Stock Subsidiary Payments of Ordinary Dividends, Preferred Stock Issuances of mandatory convertible preferred stock, net Proceeds from Issuance of Convertible Preferred Stock Issuances of common stock, net 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) and finance leases 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 Proceeds from sale of noncontrolling interests, net Proceeds from sale of noncontrolling interest, net of offering costs. Proceeds from sale of noncontrolling interest, net of offering costs. Purchases of noncontrolling interests Payments to Noncontrolling Interests Contributions from (distributions to) noncontrolling interests, net Proceeds from (Payments to) Noncontrolling Interests Intercompany activities with discontinued operations, net Increase (Decrease) in Intercompany Activities with Discontinued Operations Net, Financing Activities Increase (Decrease) in Intercompany Activities with Discontinued Operations Net, Financing Activities Debt issuance costs Payments of Debt Issuance Costs Other Proceeds from (Payments for) Other Financing Activities Net cash provided by continuing operations Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net cash provided by (used in) discontinued operations Cash Provided by (Used in) Financing Activities, Discontinued Operations Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes in continuing operations Effect of Exchange Rate on Cash and Cash Equivalents, Continuing Operations Effect of exchange rate changes in discontinued operations Effect of Exchange Rate on Cash and Cash Equivalents, Discontinued Operations 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 Increase (decrease) in cash, cash equivalents and restricted cash, including discontinued operations Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash, cash equivalents and restricted cash, including discontinued operations, January 1 Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Cash, cash equivalents and restricted cash, including discontinued operations, September 30 SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION Supplemental Cash Flow Information [Abstract] Interest payments, net of amounts capitalized Interest Paid, Excluding Capitalized Interest, Operating Activities 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 interest receivable from unconsolidated affiliate Accrued Investment Income Receivable Accrued capital expenditures Capital Expenditures Incurred but Not yet Paid Increase in finance lease obligations for investment in property, plant and equipment Dividends declared but not paid Dividends Payable Common dividends receivable from discontinued operations Dividends Receivable From Disposal Group, Including Discontinued Operation, Current Dividends Receivable From Disposal Group, Including Discontinued Operation, Current Common dividends issued in stock Common Stock Issued, Employee Stock Trust ACQUISITIONS, DIVESTITURES AND DISCONTINUED OPERATIONS Mergers, Acquisitions and Dispositions Disclosures [Text Block] Schedule of Leases Statement of Financial Position Schedule of Leases Statement of Financial Position [Table Text Block] Schedule of Leases Statement of Financial Position [Table Text Block] Schedule of Lease Cost Lease, Cost [Table Text Block] Schedule of Lease Cash Flow Activity [Table Text Block] Schedule of Lease Cash Flow Activity [Table Text Block] Schedule of Lease Cash Flow Activity [Table Text Block] Schedule of Operating Lease Maturity Payments Lessee, Operating Lease, Liability, Maturity [Table Text Block] Schedule of Finance Lease Maturity Payments Finance Lease, Liability, Maturity [Table Text Block] Schedule of Operating Lease Payments to Be Received Lessor, Operating Lease, Payments to be Received, Maturity [Table Text Block] Schedule of Operating Lease Payments Received, Lease Income [Table Text Block] Operating Lease, Lease Income [Table Text Block] Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Measurement Frequency [Domain] Measurement Frequency [Domain] Recurring [Member] Fair Value, Recurring [Member] Fair Value Measured at Net Asset Value Per Share [Member] Fair Value Measured at Net Asset Value Per Share [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 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] Investments at NAV Alternative Investment 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 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 Financial and Nonfinancial Liabilities, Fair Value Disclosure ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Restricted cash Accounts receivable – trade, net Accounts Receivable, after Allowance for Credit Loss, Current Accounts receivable – other, net Accounts and Financing Receivable, after Allowance for Credit Loss, Current Dividends receivable from discontinued operations Due from unconsolidated affiliates Income taxes receivable Income Taxes Receivable, Current Prepaid expenses Prepaid Expense, Current Regulatory assets Regulatory Assets, Current 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: Assets, Noncurrent [Abstract] Restricted cash Due from unconsolidated affiliates Regulatory assets Nuclear decommissioning trusts Decommissioning Fund Investments Investment in Oncor Holdings Other investments Other Investments Goodwill Goodwill Other intangible assets Intangible Assets, Net (Excluding Goodwill) Dedicated assets in support of certain benefit plans Assets Held-in-trust, Noncurrent Insurance receivable for Aliso Canyon costs Insurance Settlements Receivable, Noncurrent Deferred income taxes Greenhouse gas allowances Greenhouse Gas Allowances, Noncurrent Greenhouse Gas Allowances, Noncurrent Wildfire fund Assets held for sale in discontinued operations Disposal Group, Including Discontinued Operation, Assets, Noncurrent Sundry 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 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 Dividends and interest payable Interest and Dividends Payable, Current Accrued compensation and benefits Employee-related Liabilities, Current Accrued franchise fees Other Accrued Liabilities, Current Regulatory liabilities Regulatory Liability, Current Customer deposits Contract with Customer, Liability, Current Reserve for Aliso Canyon costs Payable Related To Natural Gas Leak Reserve for Aliso Canyon costs. Greenhouse gas obligations Greenhouse Gas Obligations, Current Greenhouse Gas Obligations, Current Asset retirement obligations Asset Retirement Obligation, Current Liabilities held for sale in discontinued operations Disposal Group, Including Discontinued Operation, Liabilities, Current Deferred credits and other liabilities: Deferred Credits and Other Liabilities [Abstract] Due to unconsolidated affiliates 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 Asset retirement obligations Asset Retirement Obligations, Noncurrent Greenhouse gas obligations Greenhouse Gas Obligations, Noncurrent Greenhouse Gas Obligations, Noncurrent Liabilities held for sale in discontinued operations Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent 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 Total shareholders’ equity Stockholders' Equity Attributable to Parent Preferred stock of subsidiary Noncontrolling Interest, Amount Represented by Preferred Stock Total equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Regulatory Matters Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Chilquinta Energia [Member] Chilquinta Energia [Member] State Grid International Development Limited [Member] State Grid International Development Limited [Member] State Grid International Development Limited [Member] Eletrans [Member] Eletrans [Member] Eletrans [Member] Luz Del Sur [Member] Luz Del Sur [Member] Luz Del Sur [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] Ownership interest Noncontrolling Interest, Ownership Percentage by Parent Revenues Disposal Group, Including Discontinued Operation, Revenue Cost of sales Disposal Group, Including Discontinued Operation, Costs of Goods Sold Operating expenses Disposal Group, Including Discontinued Operation, Operating Expense Interest and other Disposal Group, Including Discontinued Operation, Interest Expense Income before income taxes and equity earnings Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax Income tax benefit (expense) Discontinued Operation, Tax Effect of Discontinued Operation Equity earnings Disposal Group, Including Discontinued Operation, Income (Loss) From Equity Investments Disposal Group, Including Discontinued Operation, Income (Loss) From Equity Investments Income from discontinued operations, net of income tax Earnings attributable to noncontrolling interests Restricted cash Disposal Group, Including Discontinued Operation, Restricted Cash and Cash Equivalents Disposal Group, Including Discontinued Operation, Restricted Cash and Cash Equivalents Accounts receivable, net Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net Due from unconsolidated affiliates Disposal Group, Including Discontinued Operation, Due From Affiliate, Current Disposal Group, Including Discontinued Operation, Due From Affiliate, Current Inventories Disposal Group, Including Discontinued Operation, Inventory, Current Other current assets Disposal Group, Including Discontinued Operation, Other Assets, Current Current assets Due from unconsolidated affiliates Disposal Group, Including Discontinued Operation, Due From Affiliate, Noncurrent Disposal Group, Including Discontinued Operation, Due From Affiliate, Noncurrent Goodwill and other intangible assets Disposal Group, Including Discontinued Operation, Goodwill and Other Intangible Assets Disposal Group, Including Discontinued Operation, Goodwill and Other Intangible Assets 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 Noncurrent assets Short-term debt Disposal Group, Including Discontinued Operation, Short-Term Debt Disposal Group, Including Discontinued Operation, Short-Term Debt Accounts payable Disposal Group, Including Discontinued Operation, Accounts Payable, Current Dividends payable Disposal Group, Including Discontinued Operation, Dividends Payable, Current Disposal Group, Including Discontinued Operation, Dividends Payable, Current Current portion of long-term debt and finance leases Disposal Group, Including Discontinued Operation, Long-term Debt, Current Maturities Disposal Group, Including Discontinued Operation, Long-term Debt, Current Maturities Other current liabilities Disposal Group, Including Discontinued Operation, Other Liabilities, Current Current liabilities Long-term debt and finance leases Disposal Group, Including Discontinued Operation, Long-Term Debt and Finance Leases Disposal Group, Including Discontinued Operation, Long-Term Debt and Finance Leases Deferred income taxes Disposal Group, Including Discontinued Operation, Deferred Tax Liabilities, Noncurrent Other noncurrent liabilities Disposal Group, Including Discontinued Operation, Other Liabilities, Noncurrent Noncurrent liabilities Cumulative foreign translation adjustments Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Weighted Average [Member] Weighted Average [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 July 1 Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs Realized and unrealized (losses) gains 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 September 30 Change in unrealized gains (losses) relating to instruments still held at the end of the period Fair Value, Asset, Recurring Basis, Still Held, 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. Jointly Owned Utility Plant, Net Ownership Amount [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] Jointly Owned Nuclear Power Plant [Member] Jointly Owned Nuclear Power Plant [Member] Jointly Owned Utility Plant Interests [Line Items] Jointly Owned Utility Plant Interests [Line Items] Jointly owned utility plant, proportionate ownership share Jointly Owned Utility Plant, Proportionate Ownership Share 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 Nuclear decommissioning trust authorized withdrawal amount Authorized Recovery Amount, Nuclear Decommissioning Trust Funding Authorized Recovery Amount, Nuclear Decommissioning Trust Funding. ARO related to decommissioning costs Decommissioning Liability Decommissioning Liability Cost study estimate decommissioning escalated Cost Study Estimate Decommissioning Escalated Total Estimated Nuclear Decommissioning Costs, Latest Cost Study Escalated. Debt and Credit Facilities Debt Disclosure [Text Block] 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 Return on rate base Cost Of Capital Authorized Return On Rate Base Cost Of Capital Authorized Return On Rate Base Return on rate base, revised Cost Of Capital Authorized Rate Of Recovery, Revised Cost Of Capital Authorized Rate Of Recovery, Revised Return on rate base, revised Cost Of Capital Authorized Return On Rate Base, Revised Cost Of Capital Authorized Return On Rate Base, Revised Return on rate, proposed Cost Of Capital Authorized Rate Of Recovery, Proposed Cost Of Capital Authorized Rate Of Recovery, Proposed Return on rate base, proposed Cost Of Capital Authorized Return On Rate Base, Proposed Cost Of Capital Authorized Return On Rate Base, Proposed Authorized weighting, proposed Cost Of Capital Authorized Weighting, Proposed Cost Of Capital Authorized Weighting, Proposed 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 Firefighters [Member] Complaints Filed by Firefighters [Member] Complaints Filed by Firefighters [Member] Complaints Filed by Public Entities [Member] Complaints Filed by Public Entities [Member] Complaints Filed by Public Entities [Member] Aliso Canyon Natural Gas Storage Facility Gas Leak [Member] Aliso Canyon Natural Gas Storage Facility Gas Leak [Member] Wildfire [Member] Wildfire [Member] Damages from Product Defects [Member] Damages from Product Defects [Member] Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Funding for Environmental Projects [Member] Funding for Environmental Projects [Member] Funding for Environmental Projects [Member] Civil Penalties [Member] Civil Penalties [Member] Civil Penalties [Member] Liability for legal proceedings Estimated Litigation Liability Write-off of wildfire regulatory asset Loss Contingency Accrual, Provision After-tax charge for nonrecovery of CPUC regulatory assets After-tax charge for nonrecovery of CPUC regulatory assets After-tax charge for nonrecovery of CPUC regulatory assets Number of plaintiffs Loss Contingency, Number of Plaintiffs Settlement amount payable Litigation Settlement, Amount Awarded to Other Party 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 Loss contingency accrual Loss Contingency Accrual Insurance settlements receivable Insurance Settlements Receivable 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 Receivable related to natural gas leak Receivable related to natural gas leak Insurance receivable for Aliso Canyon costs Payable related to natural gas leak, noncurrent Payable Related To Natural Gas Leak, Noncurrent Payable Related To Natural Gas Leak, Noncurrent Insurance proceeds Proceeds from Insurance Settlement, Operating Activities Liability insurance coverage Liability Insurance Coverage Liability Insurance Coverage 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 Working gas target Storage Facility, Working Gas Target Storage Facility, Working Gas Target Interest percentage Equity Method Investment, Ownership Percentage Net book value of Aliso Canyon facility Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment Service agreement term Service Agreement, Term Service Agreement, Term Operating leases Lessee, Operating Lease, Liability, Payment, Due [Abstract] 2019 (excluding first nine months of 2019) Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year 2020 Lessee, Operating Lease, Liability, Payments, Due Year Two 2021 Lessee, Operating Lease, Liability, Payments, Due Year Three 2022 Lessee, Operating Lease, Liability, Payments, Due Year Four 2023 Lessee, Operating Lease, Liability, Payments, Due Year Five Thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five Total undiscounted lease payments Lessee, Operating Lease, Liability, Payments, Due Less: imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Total operating lease liabilities Operating Lease, Liability Less: current lease liabilities Operating Lease, Liability, Current Long-term lease liabilities Operating Lease, Liability, Noncurrent Finance leases Finance Lease, Liability, Payment, Due [Abstract] 2019 (excluding first nine months of 2019) Finance Lease, Liability, Payments, Remainder of Fiscal Year 2020 Finance Lease, Liability, Payments, Due Year Two 2021 Finance Lease, Liability, Payments, Due Year Three 2022 Finance Lease, Liability, Payments, Due Year Four 2023 Finance Lease, Liability, Payments, Due Year Five Thereafter Finance Lease, Liability, Payments, Due after Year Five Total undiscounted lease payments Finance Lease, Liability, Payment, Due Less: imputed interest Finance Lease, Liability, Undiscounted Excess Amount Total finance lease liabilities Less: current lease liabilities Finance Lease, Liability, Current Long-term lease liabilities Finance Lease, Liability, Noncurrent Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Foreign currency translation adjustments [Member] Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Financial instruments [Member] Pension and other postretirement benefits [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] Beginning balance Cumulative-effect adjustment from change in accounting principle Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect 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 Ending balance Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Interest Rate Swap, maturing in March 2021 [Member] Interest Rate Swap, maturing in March 2021 [Member] Interest Rate Swap, maturing in March 2021 [Member] Sempra Energy Consolidated [Member] Sempra Energy Consolidated [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Weighted average interest rate on total short-term debt outstanding Short-term Debt, Weighted Average Interest Rate, at Point in Time Fixed interest rate Derivative, Fixed Interest Rate GENERAL INFORMATION AND OTHER FINANCIAL DATA Additional Financial Information Disclosure [Text Block] 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] Contract liabilities, opening balance 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 Contract liabilities, closing balance Number of reportable segments Number of Reportable Segments 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] Schedule of Fair Value Inputs Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Fair Value of Financial Instruments Table Fair Value, by Balance Sheet Grouping [Table Text Block] 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] Corporate, Non-Segment [Member] Corporate, Non-Segment [Member] Segment Reconciling Items [Member] Segment Reconciling Items [Member] Intersegment eliminations [Member] Intersegment Eliminations [Member] SoCalGas [Member] So Cal Gas Segment [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] 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 Equity earnings (losses), net of income tax: Income (Loss) From Equity Method Investments Net Of Tax Equity earnings, net of income tax. EARNINGS (LOSSES) ATTRIBUTABLE TO COMMON SHARES Discontinued operations 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 Discontinued operations Disposal Group, Including Discontinued Operation, Assets EQUITY METHOD AND OTHER INVESTMENTS Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Commodity Derivative Volumes Table Schedule of Derivative Instruments [Table Text Block] Notional Amounts of 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] Statement of Stockholders' Equity [Abstract] Common Stock [Member] Common Stock Including Additional Paid in Capital [Member] Retained earnings [Member] Retained Earnings [Member] Accumulated other comprehensive income (loss) [Member] Shareholders' equity [Member] Parent [Member] Noncontrolling Interest [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning Balance Cumulative-effect adjustment from change in accounting principle Cumulative Effect of New Accounting Principle in Period of Adoption Net income (loss) Other comprehensive (loss) income Share-based compensation expense APIC, Share-based Payment Arrangement, Increase for Cost Recognition Dividends declared: Dividends [Abstract] Common stock dividends declared Dividends, Common Stock Equity contribution Contributions From Parent Contributions From Parent Issuances of stock Stock Issued During Period, Value, New Issues Repurchases of common stock Stock Repurchased During Period, Value Noncontrolling interest activities: Noncontrolling Interest Items [Abstract] Noncontrolling interests activities: Contributions Noncontrolling Interest, Increase from Subsidiary Equity Issuance Noncontrolling interests activities: Distributions Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Noncontrolling interests activities: Purchases Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Noncontrolling interests activities: Deconsolidation Noncontrolling Interest, Decrease from Deconsolidation Noncontrolling interests activities: Sales Noncontrolling Interest, Increase from Sale of Parent Equity Interest Noncontrolling interest activities: Acquisition Noncontrolling Interest, Increase from Business Combination Ending balance Fair Value Measurements Fair Value Disclosures [Text Block] Junior Subordinated Debt [Member] Junior Subordinated Debt [Member] Bonds [Member] Bonds [Member] Redemption Term [Axis] Redemption Term [Axis] Redemption Term [Axis] Redemption Term [Domain] Redemption Term [Domain] [Domain] for Redemption Term [Axis] On Or After October 1, 2024 [Member] On Or After October 1, 2024 [Member] On Or After October 1, 2024 [Member] Before October 1, 2024, Amended Tax Regulations [Member] Before October 1, 2024, Amended Tax Regulations [Member] Before October 1, 2024, Amended Tax Regulations [Member] Before October 1, 2024, Equity Credit Methodology Update [Member] Before October 1, 2024, Equity Credit Methodology Update [Member] Before October 1, 2024, Equity Credit Methodology Update [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Junior Subordinated Notes Due 2079 [Member] Junior Subordinated Notes Due 2079 [Member] Junior Subordinated Notes Due 2079 [Member] First Mortgage Bonds Due June 2049 [Member] FirstMortgageBondsDueJune2049 [Member] FirstMortgageBondsDueJune2049 [Member] Variable-Rate Loan. Due August 2024 [Member] Variable-Rate Loan. Due August 2024 [Member] Variable-Rate Loan. Due August 2024 [Member] First Mortgage Bonds, Due June 2050 [Member] First Mortgage Bonds, Due June 2050 [Member] First Mortgage Bonds, Due June 2050 [Member] Debt amount Debt Instrument, Face Amount Stated rate of debt Debt Instrument, Interest Rate, Stated Percentage Par value of each note Debt Instrument, Face Amount, Per Note Debt Instrument, Face Amount, Per Note Net proceeds of debt Proceeds from Debt, Net of Issuance Costs Debt issuance costs Debt Issuance Costs, Gross Redemption price Debt Instrument, Redemption Price, Percentage Repayments of variable-rate loan Proceeds from (Repayments of) Debt Schedule of Cash and Cash Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Inventory Table Schedule of Inventory, Current [Table Text Block] Capitalized Financing Costs Table Schedule of Capitalization [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] 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] 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] Summarized Results from Discontinued Operations Disposal Groups, Including Discontinued Operations [Table Text Block] Cover page. Document Information [Table] Document Information [Table] Sempra Energy 5.75% Junior Subordinated Notes Due 2079 [Member] Sempra Energy 5.75% Junior Subordinated Notes Due 2079 [Member] Sempra Energy 5.75% Junior Subordinated Notes Due 2079 [Member] Document Information [Line Items] Document Information [Line Items] Document Type Document Type Document Quarterly Report Document Quarterly Report Document Period End Date Document Period End Date Document Transition Report Document Transition Report Entity File Number Entity File Number Entity Registrant Name Entity Registrant Name Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address, Address Line One Entity Address, City or Town Entity Address, City or Town Entity Address, State or Province Entity Address, State or Province Entity Address, Postal Zip Code Entity Address, Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Title of 12(b) Security Title of 12(b) Security Trading Symbol Trading Symbol Security Exchange Name Security Exchange Name Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Shell Company Entity Shell Company Entity Common Shares Outstanding Entity Common Stock, Shares Outstanding 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 Central Index Key Entity Central Index Key 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] Assets held-for-sale [Member] Assets Held-for-sale [Member] Assets Held-for-sale [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, after Allowance for Credit Loss REVENUES Revenue from Contract with Customer [Text Block] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Assets Leased to Others [Member] Assets Leased to Others [Member] Accumulated depreciation Lessor, Operating Lease, Payments, Fiscal Year Maturity [Abstract] Lessor, Operating Lease, Payments, Fiscal Year Maturity [Abstract] 2019 (excluding first nine months of 2019) Lessor, Operating Lease, Payments to be Received, Remainder of Fiscal Year 2020 Lessor, Operating Lease, Payments to be Received, Two Years 2021 Lessor, Operating Lease, Payments to be Received, Three Years 2022 Lessor, Operating Lease, Payments to be Received, Four Years 2023 Lessor, Operating Lease, Payments to be Received, Five Years Thereafter Lessor, Operating Lease, Payments to be Received, Thereafter Total undiscounted cash flows Lessor, Operating Lease, Payments to be Received Minimum lease payments Operating Lease, Lease Income, Lease Payments Variable lease payments Operating Lease, Variable Lease Income Total revenues from operating leases Operating Lease, Lease Income Depreciation Depreciation 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. Inventory Subsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table] Subsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table] Bay Gas [Member] Bay Gas [Member] Bay Gas [Member] Ownership Interests Held By Others, Bay Gas Storage Company [Member] Infraestructura Energética Nova [Member] Infraestructura Energética Nova [Member] Infraestructura Energética Nova [Member] Sale of Stock [Axis] Sale of Stock [Axis] Sale of Stock [Domain] Sale of Stock [Domain] Public Offering [Member] Public Offering [Member] Public Offering [Member] Over-Allotment Option [Member] Over-Allotment Option [Member] Settlement of Forward Sale Contracts [Member] Settlement of Forward Sale Contracts [Member] Settlement of Forward Sale Contracts [Member] Subsidiary, Sale of Stock [Line Items] Subsidiary, Sale of Stock [Line Items] Shares issued (in shares) Stock Issued During Period, Shares, New Issues Proceeds from issuance Liquidation price (in usd per share) Preferred Stock, Liquidation Preference Per Share 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 Underwriting discounts and equity issuance costs Payments of Stock Issuance Costs Shares issuable under forward contracts Forward Contract Indexed to Issuer's Equity, Shares Common stock repurchased (in shares) Stock Repurchased During Period, Shares Repurchases of common stock Payment to acquire remaining interest in Bay Gas Payments to Acquire Additional Interest in Subsidiaries Sale of interest Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Sale of Interest by Parent, Percent Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Sale of Interest by Parent, Percent Right-of-use assets: Right-Of-Use Assets [Abstract] Right-Of-Use Assets [Abstract] Operating leases: Operating Leases [Abstract] Operating Leases [Abstract] Operating Lease, Right-of-Use Asset Finance leases: Finance Leases [Abstract] Finance Leases [Abstract] Property, plant and equipment Finance Lease, Right-Of-Use Asset, Gross Finance Lease, Right-Of-Use Asset, Gross Accumulated depreciation Finance Lease, Right-Of-Use Asset, Accumulated Depreciation Finance Lease, Right-Of-Use Asset, Accumulated Depreciation Property, plant and equipment, net Finance Lease, Right-of-Use Asset Total right-of-use assets Lease, Right-of-Use Asset Lease, Right-of-Use Asset Lease liabilities: Lease Liabilities [Abstract] Lease Liabilities [Abstract] Operating leases: Finance Lease, Operating Leases [Abstract] [Abstract] Finance Lease, Operating Leases [Abstract] [Abstract] Other current liabilities Finance Lease, Finance Leases [Abstract] Finance Lease, Finance Leases [Abstract] Finance Lease, Finance Leases [Abstract] Current portion of long-term debt and finance leases Long-term debt and finance leases Total lease liabilities Lease, Liability Lease, Liability Weighted-average remaining lease term (in years): Weighted Average Remaining Lease Term [Abstract] Weighted Average Remaining Lease Term [Abstract] Operating leases, Weighted-average remaining lease term (in years) Operating Lease, Weighted Average Remaining Lease Term Finance leases, Weighted-average remaining lease term (in years) Finance Lease, Weighted Average Remaining Lease Term Weighted-average discount rate: Leases, Weighted Average Discount Rate [Abstract] Leases, Weighted Average Discount Rate [Abstract] Operating leases, Weighted-average discount rate Operating Lease, Weighted Average Discount Rate, Percent Finance leases, Weighted-average discount rate Finance Lease, Weighted Average Discount Rate, Percent Option to extend terms Lessee, Operating Lease, Renewal Term Termination period Lessee, Operating Lease, Termination Period Lessee, Operating Lease, Termination Period Lease term Lessee, Operating Lease, Term of Contract Annual increase in rent Annual Increase in Rent, Percentage Annual Increase in Rent, Percentage Number of battery storage facilities Number of Battery Storage Facilities Number of Battery Storage Facilities Leases not yet commenced, future minimum lease payments, 2020 - 2024 Lessee, Finance Lease, Lease Not yet Commenced, Liability, Payments, Due Year One Through Five Lessee, Finance Lease, Lease Not yet Commenced, Liability, Payments, Due Year One Through Five Leases not yet commenced, future minimum lease payments, thereafter Lessee, Finance Lease, Lease Not yet Commenced, Liability, Payments, Thereafter Lessee, Finance Lease, Lease Not yet Commenced, Liability, Payments, Thereafter Aggregate maximum lease limit Lessee, Finance Lease, Lease Not yet Commenced, Aggregate Maximum Lease Limit Lessee, Finance Lease, Lease Not yet Commenced, Aggregate Maximum Lease Limit Aggregate maximum lease limit, utilized Lessee, Finance Lease, Lease Not yet Commenced, Aggregate Maximum Lease Limit, Utilized Lessee, Finance Lease, Lease Not yet Commenced, Aggregate Maximum Lease Limit, Utilized Schedule Of General Rate Case, Authorized Revenue Increases Schedule Of General Rate Case, Authorized Revenue Increases [Table Text Block] Schedule Of General Rate Case, Authorized Revenue Increases [Table Text Block] Schedule of Regulatory Assets Schedule of Regulatory Assets [Table Text Block] Schedule of Regulatory Liabilities Schedule of Regulatory Liabilities [Table Text Block] Segment Information Segment Reporting Disclosure [Text Block] Derivative fair value Derivative, Net Liability Position, Aggregate Fair Value Collateral Additional Collateral, Aggregate Fair Value Rabbi trust Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Current assets: Other [Member] Other Current Assets [Member] Other assets: Sundry [Member] Other Noncurrent Assets [Member] Current liabilities: Other [Member] Deferred credits and other liabilities: Deferred credits and other [Member] Other Noncurrent Liabilities [Member] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] 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 Associated offsetting foreign exchange instruments Derivative Offsetting Foreign Exchange Contracts Derivative Offsetting Foreign Exchange Contracts 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 Investments, Fair Value Disclosure [Abstract] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [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] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] 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 Proceeds from Sale of Debt Securities, Available-for-sale Gross realized gains Available-for-sale Securities, Gross Realized Gains Gross realized losses Available-for-sale Securities, Gross Realized Losses