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additional basis spread 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 Regulatory Balancing Accounts, Gas transportation [Member] Regulatory Balancing Accounts, Gas Transportation [Member] Regulatory Balancing Accounts, Gas Transportation [Member] SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION Supplemental Cash Flow Information [Abstract] Effect of exchange rate changes in discontinued operations Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Disposal Group, Including Discontinued Operations Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Equity Securities, Domestic [Member] Defined Benefit Plan, Equity Securities, US [Member] Litigation fines, after tax Loss Contingency, Loss In Period, After Tax Loss Contingency, Loss In Period, After Tax Junior Subordinated Debt [Member] Junior Subordinated Debt [Member] Total recognized in net periodic benefit cost and OCI Defined Benefit Plan, Amount Recognized in Net Periodic Benefit Cost (Credit) and Other Comprehensive (Income) Loss, before Tax Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Other Long Term Debt Due November 2025 [Member] Other Long-term Debt, Due November 2025 [Member] Other Long Term Debt Due November 2025 [Member] Environmental Issues [Table] Environmental Issues [Table] Schedule Of Capitalized Financing Costs Schedule of Capitalization [Table Text Block] Right-of-use assets – operating leases Deferred Tax Liabilities, Operating Lease, Right-of-Use Asset Deferred Tax Liabilities, Operating Lease, Right-of-Use Asset Less accumulated depreciation and amortization Accumulated depreciation Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Preferred stock outstanding Preferred Stock, Value, Outstanding Realized and unrealized gains (losses) Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings Vested at period end, Aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Due to/from Various Affiliates [Member] Subsidiary Of Common Parent Other Affiliates [Member] Finance leases, property plant and equipment, net Finance Lease, Right-of-Use Asset, after Accumulated Amortization Hedging Relationship [Domain] Hedging Relationship [Domain] Lessee, Operating Lease, Liability, Maturity Lessee, Operating Lease, Liability, Maturity [Table Text Block] Post-closing adjustments Payments To Acquire Equity Method Investments, Post Closing Adjustments Payments To Acquire Equity Method Investments, Post Closing Adjustments Variable percentage rate Basis spread on variable percentage rate Debt Instrument, Basis Spread on Variable Rate Risk-free rate of return (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Income tax benefit related to outside differences on plans to sell 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 Cash and cash equivalents [Member] Cash and Cash Equivalents [Member] Variable Interest Entities Consolidation, Variable Interest Entity, Policy [Policy Text Block] Retiree [Axis] Retiree [Axis] REVENUES Revenue from Contract with Customer [Text Block] Ownership percentage in equity method investee Equity Method Investment, Ownership Percentage Schedule of Condensed Statements of Operations Condensed Income Statement [Table Text Block] Sempra Energy and Other [Member] Sempra Energy and Other [Member] Sempra Energy and Other [Member] Issuance of RSUs held in our Deferred Compensation Plan Stock Issued During Period, Shares, Other Penalties credited to customers Penalties Credited to Customers Penalties Credited to Customers Pipelines and storage [Member] Pipelines And Storage Equipment [Member] Defined Benefit Plan, Other Defined Benefit Plan, Other [Member] Defined Benefit Plan, Other Share-Based Compensation, Restricted Stock Awards And Units [Member] Share-Based Compensation, Restricted Stock Awards And Units [Member] Amortization of actuarial loss Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax Actuarial loss Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) Southwest Powerlink [Member] Southwest Powerlink [Member] Southwest Powerlink [Member] Oncor Electric Delivery Holdings Company LLC [Member] Oncor Electric Delivery Holdings Company LLC [Member] Oncor Electric Delivery Holdings Company LLC [Member] Advances to unconsolidated affiliates Payments to Fund Long-term Loans to Related Parties Other Long Term Debt, Variable Rate Notes Due March 2021 [Member] Other Long Term Debt, Due March 2021 [Member] Other Long Term Debt, Variable Rate Notes Due March 2021 [Member] Other Long Term Debt, Variable Rate Notes Due March 2021 [Member] Thereafter Decommissioning Costs, Undiscounted Future Payments, After Year Five Decommissioning Costs, Undiscounted Future Payments, After Year Five Schedule of Maturities of Long-term Debt Schedule of Maturities of Long-term Debt [Table Text Block] Utility repairs expenditures Effective Income Tax Rate Reconciliation, Utility Repair Allowance Effective income tax rate reconciliation, utility repair allowance. Liberty Gas Storage, LLC [Member] Liberty Gas Storage, LLC [Member] Liberty Gas Storage, LLC [Member] Long-term Purchase Commitment [Table] Long-term Purchase Commitment [Table] Local Phone Number Local Phone Number Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Natural Gas Supply Contracts [Member] Natural Gas Supply Contracts [Member] Income tax expense Discontinued Operation, Tax Effect of Discontinued Operation Jointly Owned Utility Plant Interests [Line Items] Jointly Owned Utility Plant Interests [Line Items] Bay Gas [Member] Bay Gas [Member] Bay Gas [Member] Financial instruments attributable to parent [Member] Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Materials and supplies Energy Related Inventory, Materials And Supplies Energy related inventory, materials and supplies. Greenhouse gas allowances Greenhouse Gas Allowances, Current Greenhouse Gas Allowances, Current Beginning balance Ending balance Contract with Customer, Liability Project [Axis] Project [Axis] Purchases of noncontrolling interests Payments To Acquire Noncontrolling Interest Payments To Acquire Noncontrolling Interest Other current assets Increase (Decrease) in Other Operating Assets Interest rate and foreign exchange instruments Derivative Interest Rate And Foreign Exchange Instruments Designated Interest rate instruments designated as hedging instruments. Accrued commercial paper proceeds Accrued Proceeds From Issuance Of Commercial Paper Accrued Proceeds From Issuance Of Commercial Paper Operation and Maintenance Expenses Selling, General and Administrative Expenses, Policy [Policy Text Block] Award Type [Axis] Award Type [Axis] WEIGHTED-AVERAGE ASSUMPTIONS USED TO DETERMINE NET PERIODIC BENEFIT COST Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] Discount rate Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate First Mortgage Bonds, Due April 2050 First Mortgage Bonds, Due April 2050 [Member] First Mortgage Bonds, Due April 2050 EXPECTED CONTRIBUTIONS Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rate [Abstract] Equity instruments other than options, vested in the period, fair value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Percentage of environmental exit costs incurred Environmental Exit Costs, Anticipated Cost, Percentage Environmental Exit Costs, Anticipated Cost, Percentage Other noncurrent assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Segment Reporting Information, Profit (Loss) [Abstract] Segment Reporting Information, Profit (Loss) [Abstract] Equity method investment, difference between carrying amount and underlying equity, aoci Equity Method Investment, Difference Between Carrying Amount and Underlying Equity, AOCI Equity Method Investment, Difference Between Carrying Amount and Underlying Equity, AOCI Net Regulatory Assets (Liabilities) SoCalGas [Member] Net Regulatory Assets (Liabilities) So Cal Gas [Member] Revisions Asset Retirement Obligation, Revision of Estimate Sempra LNG [Member] Sempra LNG [Member] Sempra LNG [Member] Schedule Of Condensed Statements Of Comprehensive Income Condensed Statement of Comprehensive Income [Table Text Block] Outstanding at period end, Weighted- average remaining contractual term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Schedule Of Defined Benefit Plans, Change In Benefit Obligation And Fair Value Of Plan Assets Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan [Table Text Block] Lessor, Operating Lease, Payments to be Received, Maturity Lessor, Operating Lease, Payment to be Received, Fiscal Year Maturity [Table Text Block] Award Type [Domain] Award Type [Domain] Current liabilities Liability, Defined Benefit Plan, Current Equity Earnings [Member] Equity Earnings Before Income Tax [Member] Aggregate fair value of net liability position Derivative, Net Liability Position, Aggregate Fair Value 2020 GRC FD [Member] 2020 GRC FD [Member] 2020 GRC FD [Member] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] SEMPRA ENERGY - SHAREHOLDERS' EQUITY AND EARNINGS PER SHARE Earnings Per Share [Text Block] Discount rate Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Deferred Credits and Other Liabilities [Abstract] Deferred Credits and Other Liabilities [Abstract] Management agreement termination fee Management Agreement Termination Fee Management Agreement Termination Fee Asset Retirement Obligations [Table] Asset Retirement Obligations [Table] Liabilities, Current [Abstract] Liabilities, Current [Abstract] U.S. federal statutory income tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Vested at period end, Weighted- average exercise price (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Income Tax Contingency [Table] Income Tax Contingency [Table] New Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Basic EPS: Earnings Per Share, Basic [Abstract]