2.2.0.25truefalse040700 - Disclosure - INCOME TAXES (Details)truefalsefalse1falsefalseUSDfalsefalse1/1/2010 - 12/31/2010 USD ($) $FROM_Jan01_2010_TO_Dec31_2010http://www.sec.gov/CIK0001032208duration2010-01-01T00:00:002010-12-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2falsefalseUSDfalsefalse1/1/2009 - 12/31/2009 USD ($) $FROM_Jan01_2009_TO_Dec31_2009http://www.sec.gov/CIK0001032208duration2009-01-01T00:00:002009-12-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$3falsefalseUSDfalsefalse1/1/2008 - 12/31/2008 USD ($) $FROM_Jan01_2008_TO_Dec31_2008http://www.sec.gov/CIK0001032208duration2008-01-01T00:00:002008-12-31T00:00:00SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$2true0sre_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationLineItemssrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseEffective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Line Items]3false0us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRateus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.350.35falsetruefalsefalsefalse2truetruefalse0.350.35falsetruefalsefalsefalse3truetruefalse0.350.35falsetruefalsefalsefalseMonetaryus-types:percentItemTypepureThe domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate shall be the regular tax rate if there are alternative tax systems.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 47 falsefalseEffective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate4false0us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepreciationus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.060.06falsefalsefalsefalsefalse2truetruefalse0.030.03falsefalsefalsefalsefalse3truetruefalse0.030.03falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureThe portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the different depreciation methods allowed under generally accepted accounting principles and enacted tax laws.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, Nondeductible Expense, Depreciation5false0us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxesus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00falsefalsefalsefalsefalse2truetruefalse0.030.03falsefalsefalsefalsefalse3truetruefalse0.030.03falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureThe portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the state and local income tax expense (benefit), net of the federal tax benefit (expense) thereon, recorded during the period.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, State and Local Income Taxes6false0us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.07-0.07falsefalsefalsefalsefalse2truetruefalse-0.01-0.01falsefalsefalsefalsefalse3truetruefalse-0.01-0.01falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureThe sum of the differences between the effective income tax rate and domestic federal statutory income tax rate that can be explained by all tax credits generated or utilized under enacted tax laws during the period.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, Tax Credits7false0sre_EffectiveIncomeTaxRateReconciliationAllowanceForEquityFundsUsedDuringConstructionsrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.03-0.03falsefalsefalsefalsefalse2truetruefalse-0.01-0.01falsefalsefalsefalsefalse3truetruefalse-0.01-0.01falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, Allowance For Equity Funds Used During Construction8false0us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferentialus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.12-0.12falsefalsefalsefalsefalse2truetruefalse-0.05-0.05falsefalsefalsefalsefalse3truetruefalse-0.02-0.02falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureThe portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the difference between statutory income tax rates in foreign jurisdictions and the domestic federal statutory income tax rate recorded during the period.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential9false0us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxesus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.03-0.03falsefalsefalsefalsefalse2truetruefalse-0.02-0.02falsefalsefalsefalsefalse3truetruefalse-0.02-0.02falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureThe portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to revisions in previously reported amounts of income tax provision.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, Prior Year Income Taxes10false0sre_EffectiveIncomeTaxRateReconciliationUtilityRepairAllowancesrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.02-0.02falsefalsefalsefalsefalse2truetruefalse-0.01-0.01falsefalsefalsefalsefalse3truetruefalse-0.01-0.01falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, Utility Repair Allowance11false0sre_EffectiveIncomeTaxRateReconciliationSelfDevelopedSoftwareExpendituressrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.05-0.05falsefalsefalsefalsefalse2truetruefalse-0.03-0.03falsefalsefalsefalsefalse3truetruefalse-0.02-0.02falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, Self Developed Software Expenditures12false0sre_EffectiveIncomeTaxRateReconciliationForeignExchangeAndInflationEffectssrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.020.02falsefalsefalsefalsefalse2truetruefalse0.010.01falsefalsefalsefalsefalse3truetruefalse-0.03-0.03falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, Foreign Exchange And Inflation Effects13false0sre_EffectiveIncomeTaxRateReconciliationVariableInterestEntitiessrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.010.01falsefalsefalsefalsefalse2truetruefalse-0.01-0.01falsefalsefalsefalsefalse3truetruefalse0.010.01falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, Variable Interest Entities14false0us-gaap_EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpenseus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00falsefalsefalsefalsefalse2truetruefalse0.010.01falsefalsefalsefalsefalse3falsetruefalse00falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureThe portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to noncontrolling interest income (expense) that is exempt from income taxes under enacted tax laws.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Expense)15false0us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRateus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.020.02falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalse3falsetruefalse00falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureThe portion of the difference between total income tax expense (benefit) as reported in the Income Statement and the expected income tax expense (benefit) that is attributable to changes in the income tax laws or rates.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph g falsefalseEffective Income Tax Rate Reconciliation, Change in Enacted Tax Rate16false0sre_EffectiveIncomeTaxRateReconciliationImpairmentEquityMethodInvestmentsrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.02-0.02falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalse3falsetruefalse00falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, Impairment Equity Method Investment17false0us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustmentsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.010.01falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalse3falsetruefalse00falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureThe portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to all other items not otherwise listed in the existing taxonomy.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, Other Adjustments18false0us-gaap_EffectiveIncomeTaxRateContinuingOperationsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truetruefalse0.130.13falsefalsefalsefalsefalse2truetruefalse0.290.29falsefalsefalsefalsefalse3truetruefalse0.30.3falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureA ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 47 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 2 -Article 4 truefalseEffective Income Tax Rate, Continuing Operations19false0us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomesticus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse447000000447000000falsefalsefalsefalsefalse2truefalsefalse10070000001007000000falsefalsefalsefalsefalse3truefalsefalse11990000001199000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe portion of earnings (loss) from continuing operations before income taxes that is attributable to domestic operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 1(i) -Article 4 falsefalseIncome (Loss) from Continuing Operations before Income Taxes, Domestic20false0us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeignus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse339000000339000000falsefalsefalsefalsefalse2truefalsefalse469000000469000000falsefalsefalsefalsefalse3truefalsefalse244000000244000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe portion of earnings (loss) from continuing operations before income taxes that is attributable to foreign operations, which is defined as income (loss) generated from operations located outside the entity's country of domicile.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 1(i) -Article 4 falsefalseIncome (Loss) from Continuing Operations before Income Taxes, Foreign21false0us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestmentsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse786000000786000000falsefalsefalsefalsefalse2truefalsefalse14760000001476000000falsefalsefalsefalsefalse3truefalsefalse14430000001443000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetarySum of operating profit and nonoperating income (expense) before income (loss) from equity method investments, income taxes, extraordinary items, cumulative effects of changes in accounting principles, and noncontrolling interest.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 1(i) -Article 4 truefalseIncome before income taxes and equity earnings of certain unconsolidated subsidiaries22true0sre_IncomeTaxExpenseBenefitContinuingOperationsLineItemssrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseIncome Tax Expense (Benefit), Continuing Operations [Line Items]23false0us-gaap_CurrentFederalTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse2700000027000000falsefalsefalsefalsefalse2truefalsefalse3900000039000000falsefalsefalsefalsefalse3truefalsefalse-10000000-10000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of income tax expense for the period representing amounts paid or payable (or refundable) as determined by applying the provisions of enacted federal tax law to the domestic taxable income (loss) from continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Paragraph Question 1-7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 289 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 falsefalseCurrent Federal Tax Expense (Benefit)24false0us-gaap_CurrentStateAndLocalTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-3000000-3000000falsefalsefalsefalsefalse2truefalsefalse4000000040000000falsefalsefalsefalsefalse3truefalsefalse2800000028000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of income tax expense for the period representing amounts paid or payable (or refundable) as determined by applying the provisions of enacted state and local tax law to relevant amounts of taxable income (loss) from continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 289 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 falsefalseCurrent State and Local Tax Expense (Benefit)25false0us-gaap_CurrentForeignTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse3000000030000000falsefalsefalsefalsefalse2truefalsefalse4800000048000000falsefalsefalsefalsefalse3truefalsefalse9600000096000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of income tax expense for the period representing amounts paid or payable (or refundable) as determined by applying the provisions of foreign enacted tax law to the foreign taxable income (loss) from continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 falsefalseCurrent Foreign Tax Expense (Benefit)26false0us-gaap_CurrentIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse5400000054000000falsefalsefalsefalsefalse2truefalsefalse127000000127000000falsefalsefalsefalsefalse3truefalsefalse114000000114000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of income tax expense for the period representing amounts of income taxes paid or payable (or refundable) for the period for all income tax obligations as determined by applying the provisions of relevant enacted tax laws to relevant amounts of taxable income (loss) from continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 289 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph a truefalseCurrent Income Tax Expense (Benefit)27false0us-gaap_DeferredFederalIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-11000000-11000000falsefalsefalsefalsefalse2truefalsefalse216000000216000000falsefalsefalsefalsefalse3truefalsefalse359000000359000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of total income tax expense for the period comprised of the net change during the period in the entity's domestic deferred tax assets and liabilities attributable to continuing operations as determined by applying the provisions of the federally enacted tax law.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 8, 16, 17, 289 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph b falsefalseDeferred Federal Income Tax Expense (Benefit)28false0us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse3600000036000000falsefalsefalsefalsefalse2truefalsefalse2400000024000000falsefalsefalsefalsefalse3truefalsefalse2900000029000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of total income tax expense for the period comprised of the net change in the entity's state and local deferred tax assets and liabilities attributable to continuing operations as determined by applying the provisions of the applicable enacted tax laws.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 8, 16, 17, 289 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph b falsefalseDeferred State and Local Income Tax Expense (Benefit)29false0us-gaap_DeferredForeignIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse2700000027000000falsefalsefalsefalsefalse2truefalsefalse5800000058000000falsefalsefalsefalsefalse3truefalsefalse-59000000-59000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of total income tax expense for the period comprised of the net change in the entity's net foreign deferred tax assets and liabilities attributable to continuing operations as determined by applying the provisions of applicable enacted tax laws of countries other than the country of domicile.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph b Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 289 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 falsefalseDeferred Foreign Income Tax Expense (Benefit)30false0us-gaap_DeferredIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse5200000052000000falsefalsefalsefalsefalse2truefalsefalse298000000298000000falsefalsefalsefalsefalse3truefalsefalse329000000329000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of income tax expense for the period representing the net change in the entity's deferred tax assets and liabilities pertaining to continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 289 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 truefalseDeferred Income Tax Expense (Benefit)31false0us-gaap_InvestmentTaxCreditus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-4000000-4000000falsefalsefalsefalsefalse2truefalsefalse-3000000-3000000falsefalsefalsefalsefalse3truefalsefalse-5000000-5000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount deducted from an entities' taxes, reflecting a percentage of an amount invested in certain assets spread over the useful life of those assets; includes deferred investment tax credits.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseInvestment Tax Credit32false0us-gaap_IncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse102000000102000000falsefalsefalsefalsefalse2truefalsefalse422000000422000000falsefalsefalsefalsefalse3truefalsefalse438000000438000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe sum of the current income tax expense (benefit) and the deferred income tax expense (benefit) pertaining to continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph a, b truefalseIncome tax expense (benefit)33true0sre_DeferredTaxAssetsAndLiabilitiesLineItemssrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseDeferred Tax Assets And Liabilities [Line Items]34false0us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipmentus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse19650000001965000000falsefalsefalsefalsefalse2truefalsefalse15280000001528000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount as of the balance sheet date of the estimated future tax effects attributable to the difference between the tax basis of capital assets and the basis of capital assets computed in accordance with generally accepted accounting principles. The difference in basis, attributable to different capitalization of costs, depreciation, or amortization methodologies, will increase future taxable income when such basis difference is realized. Capital assets include but are not limited to assets such as land, real estate, leasehold improvements, machinery and equipment and furniture and fixtures.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph d, e, f falsefalseDeferred Tax Liabilities, Property, Plant and Equipment35false0us-gaap_DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilitiesus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse535000000535000000falsefalsefalsefalsefalse2truefalsefalse501000000501000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount as of the balance sheet date of the estimated future tax effects arising from differences in accounting under GAAP and tax returns for assets and liabilities established under GAAP pertaining to rate-setting.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11, 43 falsefalseDeferred Tax Liabilities, Regulatory Assets and Liabilities36false0us-gaap_DeferredTaxLiabilitiesTaxDeferredIncomeus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse2300000023000000falsefalsefalsefalsefalse2truefalsefalse2500000025000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount as of the balance sheet date of the estimated future tax effects arising from revenue or other income not otherwise listed in the existing taxonomy that is included in accounting income in conformity with generally accepted accounting principles but excluded from tax-basis income, which will increase future taxable income when such income is recognized for tax purposes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph a falsefalseDeferred Tax Liabilities, Tax Deferred Income37false0sre_DeferredTaxLiabilitiesLossOnReacquiredDebtsrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1500000015000000falsefalsefalsefalsefalse2truefalsefalse1800000018000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseDeferred Tax Liabilities, Loss On Reacquired Debt38false0sre_DeferredTaxLiabilitiesPropertyTaxessrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse3800000038000000falsefalsefalsefalsefalse2truefalsefalse3400000034000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseDeferred Tax Liabilities, Property Taxes39false0us-gaap_DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliatesus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse8500000085000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount as of the balance sheet date of the estimated future tax effects attributable to investments in unconsolidated subsidiaries and investments in other affiliates which are not controlled and therefore not consolidated.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph a falsefalseDeferred Tax Liabilities, Investment in Noncontrolled Affiliates40false0us-gaap_DeferredTaxLiabilitiesOtherus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse7200000072000000falsefalsefalsefalsefalse2truefalsefalse6100000061000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cumulative amount of the estimated future tax effects attributable to other temporary differences not otherwise specified in this taxonomy that were expensed for tax purposes but capitalized in conformity with generally accepted accounting principles, or which were recognized as revenue under GAAP but not for tax purposes, which will reverse in future periods.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph a, d, e falsefalseDeferred Tax Liabilities, Other41false0us-gaap_DeferredTaxLiabilitiesus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse26480000002648000000falsefalsefalsefalsefalse2truefalsefalse22520000002252000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cumulative amount of all deferred tax liabilities, which result from applying the applicable tax rate to net taxable temporary differences pertaining to each jurisdiction to which the entity is obligated to pay income tax. A taxable temporary difference is a difference between the tax basis and the carrying amount of an asset or liability in the financial statements prepared in accordance with generally accepted accounting principles that will result in taxable amounts in one or more future periods.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 42, 43 truefalseDeferred Tax Liabilities42false0us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusinessus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse3400000034000000falsefalsefalsefalsefalse2truefalsefalse3500000035000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe tax effect as of the balance sheet date of the amount of future tax deductions arising from unused general business tax credit carryforwards. The general business tax credits are the sum of numerous tax credits which include, but are not limited to, investment tax , alcohol fuels, low income housing, alternative fuels, alternative motor vehicles, hurricane relief, disabled access, renewable resources electricity production, employer social security, orphan drug, new markets, employer provided child care facilities and services, biodiesel fuels, low sulfur diesel fuel production, distilled spirits, and the advanced nuclear power facilities credit. A tax credit carryforward is the amount by which tax credits available for utilization exceeded statutory limits on inclusion in historical filings. They can only be utilized if sufficient tax-basis income is generated in future periods and providing tax laws continue to allow such utilization.No authoritative reference available.falsefalseDeferred Tax Assets, Tax Credit Carryforwards, General Business43false0sre_DeferredTaxAssetsEquityMethodLossessrefalsedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse30000003000000falsefalsefalsefalsefalse2truefalsefalse30000003000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseDeferred Tax Assets, Equity Method Losses44false0us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse4000000040000000falsefalsefalsefalsefalse2truefalsefalse2100000021000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe sum of the tax effects as of the balance sheet date of the amount of excesses of tax deductions over gross income in a year which cannot be used on the tax returns in the current year but can be carried forward to reduce taxable income or income taxes payable in a future year, for which there must be sufficient tax-basis income to utilize a portion or all of the carryforward amount to realize the deferred tax asset.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43, 289 falsefalseDeferred Tax Assets, Operating Loss Carryforwards45false0us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOtherus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse158000000158000000falsefalsefalsefalsefalse2truefalsefalse177000000177000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from forms of compensation and benefit costs not otherwise specified in the taxonomy, which can only be deducted for tax purposes when actual costs are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph b falsefalseDeferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Other46false0us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefitsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse467000000467000000falsefalsefalsefalsefalse2truefalsefalse510000000510000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe tax effect as of the balance sheet date of the amount of estimated future tax deductions arising from postretirement benefits, which can only be deducted for tax purposes when actual costs are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph b falsefalseDeferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits47false0sre_DeferredTaxAssetsInvestmentInNoncontrolledAffiliatessrefalsedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse8300000083000000falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseDeferred Tax Assets, Investment In Noncontrolled Affiliates48false0us-gaap_DeferredTaxAssetsOtherus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse5200000052000000falsefalsefalsefalsefalse2truefalsefalse4100000041000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe tax effect as of the balance sheet date of the amount of estimated future tax deductions arising from other temporary differences not otherwise specified in the taxonomy.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 falsefalseDeferred Tax Assets, Other49false0sre_DeferredTaxAssetsStateIncomeTaxessrefalsedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse7300000073000000falsefalsefalsefalsefalse2truefalsefalse5000000050000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseDeferred Tax Assets, State Income Taxes50false0us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccountsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1000000010000000falsefalsefalsefalsefalse2truefalsefalse70000007000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from estimated losses reflected in the allowance for doubtful accounts, which can only be deducted for tax purposes when actual bad debts are known, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph b falsefalseDeferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts51false0us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReservesus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse304000000304000000falsefalsefalsefalsefalse2truefalsefalse129000000129000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from estimates of loss reserves, other than estimated credit losses, which can only be deducted for tax purposes when actual losses are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph b falsefalseDeferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Loss Reserves52false0us-gaap_DeferredTaxAssetsGrossus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse12240000001224000000falsefalsefalsefalsefalse2truefalsefalse973000000973000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe sum of the tax effects as of the balance sheet date of the amounts of all future tax deductions arising from temporary differences between tax basis and generally accepted accounting principles basis recognition of assets, liabilities, revenues and expenses, which can only be deducted for tax purposes when permitted under enacted tax laws ( before the valuation allowance, if any, to reduce such sum amount to net realizable value). Includes any tax benefit realized in deferred tax assets for significant impacts of tax planning strategies.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43, 289 truefalseDeferred Tax Assets, Gross53false0us-gaap_DeferredTaxAssetsValuationAllowanceus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse6200000062000000falsefalsefalsefalsefalse2truefalsefalse2900000029000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe sum of the portions of deferred tax assets as of the balance sheet date for which, based on the weight of available evidence, it is more likely than not will not be realized through future reductions of tax-based income.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 17 -Subparagraph e Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43-49 falsefalseDeferred Tax Assets, Valuation Allowance54false0us-gaap_DeferredTaxAssetsNetus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse11620000001162000000falsefalsefalsefalsefalse2truefalsefalse944000000944000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe aggregate tax effects as of the balance sheet date of all future tax deductions arising from temporary differences between tax basis and generally accepted accounting principles basis recognition of assets, liabilities, revenues and expenses, which can only be deducted for tax purposes when permitted under enacted tax laws; net of deducting the allocated valuation allowance, if any, to reduce such amount to net realizable value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 truefalseDeferred Tax Assets, Net55false0sre_DeferredTaxLiabilitiesNetsrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse14860000001486000000falsefalsefalsefalsefalse2truefalsefalse13080000001308000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.truefalseNet deferred income tax liability56false0sre_DeferredTaxAssetsLiabilitiesCurrentNetsrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-75000000-75000000falsefalsefalsefalsefalse2truefalsefalse-10000000-10000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseDeferred Tax (Assets) Liabilities, Current, Net57false0sre_DeferredTaxAssetsLiabilitiesNoncurrentNetsrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse15610000001561000000falsefalsefalsefalsefalse2truefalsefalse13180000001318000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseDeferred Tax (Assets) Liabilities, Noncurrent, Net58true0us-gaap_ValuationAllowanceLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseValuation Allowance [Line Items]59false0sre_IncreaseDecreaseInValuationAllowancesrefalsecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse3300000033000000falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseIncrease (Decrease) In Valuation Allowance60true0us-gaap_OperatingLossCarryforwardsLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseOperating Loss Carryforwards [Line Items]61false0sre_UndistributedForeignEarningssrefalsedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse19000000001900000000falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseAccumulated undistributed earnings of non-U.S. subsidiaries62true0sre_UnrecognizedTaxBenefitsLineItemssrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseUnrecognized Tax Benefits [Line Items]63false0us-gaap_UnrecognizedTaxBenefitsus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsetruefalsefalseperiodstartlabel1truefalsefalse9400000094000000falsefalsefalsefalsefalse2truefalsefalse104000000104000000falsefalsefalsefalsefalse3truefalsefalse131000000131000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe gross amount of unrecognized tax benefits (tax reductions recognized in financial reports but excluded from tax returns) pertaining to uncertain tax positions taken in tax returns as of the beginning balance sheet date, excluding amounts pertaining to examined tax returns.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a falsefalseUnrecognized Tax Benefits, Balance as of January 164false0us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositionsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse2900000029000000falsefalsefalsefalsefalse2truefalsefalse4400000044000000falsefalsefalsefalsefalse3truefalsefalse2300000023000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe gross amount of increases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a(1) falsefalseUnrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions65false0us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositionsus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse40000004000000falsefalsefalsefalsefalse2truefalsefalse30000003000000falsefalsefalsefalsefalse3truefalsefalse40000004000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe gross amount of decreases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a(1) falsefalseUnrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions66false0us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositionsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse50000005000000falsefalsefalsefalsefalse2truefalsefalse1500000015000000falsefalsefalsefalsefalse3truefalsefalse40000004000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe gross amount of increases in unrecognized tax benefits resulting from tax positions that have been or will be taken in the tax return for the current period, excluding amounts pertaining to examined tax returns.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a(2) falsefalseUnrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions67false0us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositionsus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse50000005000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe gross amount of decreases in unrecognized tax benefits resulting from tax positions that have been or will be taken in the tax return for the current period, excluding amounts pertaining to examined tax returns.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a(2) falsefalseUnrecognized Tax Benefits, Decreases Resulting from Current Period Tax Positions68false0us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthoritiesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse90000009000000falsefalsefalsefalsefalse2truefalsefalse5400000054000000falsefalsefalsefalsefalse3truefalsefalse3800000038000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe gross amount of decreases in unrecognized tax benefits resulting from settlements with taxing authorities.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a(3) falsefalseUnrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities69false0us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitationsus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse1800000018000000falsefalsefalsefalsefalse2truefalsefalse1200000012000000falsefalsefalsefalsefalse3truefalsefalse70000007000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe gross amount of decreases in unrecognized tax benefits resulting from lapses of the applicable statutes of limitations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a(4) falsefalseUnrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations70false0us-gaap_UnrecognizedTaxBenefitsus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsetruefalseperiodendlabel1truefalsefalse9700000097000000falsefalsefalsefalsefalse2truefalsefalse9400000094000000falsefalsefalsefalsefalse3truefalsefalse104000000104000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe gross amount of unrecognized tax benefits (tax reductions recognized in financial reports but excluded from tax returns) pertaining to uncertain tax positions taken in tax returns as of the beginning balance sheet date, excluding amounts pertaining to examined tax returns.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a falsefalseUnrecognized Tax Benefits, Balance as of December 3171false0sre_UnrecognizedTaxBenefitsThatWouldDecreaseEffectiveTaxRatesrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse7600000076000000falsefalsefalsefalsefalse2truefalsefalse7600000076000000falsefalsefalsefalsefalse3truefalsefalse6400000064000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseOf the total, amounts related to tax positions that, if recognized, in future years, would decrease the effective tax rate72false0sre_UnrecognizedTaxBenefitsThatWouldIncreaseEffectiveTaxRatesrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse50000005000000falsefalsefalsefalsefalse2truefalsefalse1300000013000000falsefalsefalsefalsefalse3truefalsefalse1700000017000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseOf the total, amounts related to tax positions that, if recognized, in future years, would increase the effective tax rate73false0us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-1000000-1000000falsefalsefalsefalsefalse2truefalsefalse20000002000000falsefalsefalsefalsefalse3truefalsefalse1800000018000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis element represents interest expense recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph c Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 15 falsefalseUnrecognized Tax Benefits, Interest on Income Taxes Expense74false0us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse40000004000000falsefalsefalsefalsefalse2truefalsefalse40000004000000falsefalsefalsefalsefalse3truefalsefalse10000001000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis element represents the recognized expense for the amount of statutory penalties in the period in which the entity claims or expects to claim a tax position, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties or, if not recognizing the expense in the period in which the tax return was initially filed, the expense shall be recognized in the period in which the enterprise's judgment about meeting the minimum statutory threshold changes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 16 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph c falsefalseUnrecognized Tax Benefits, Income Tax Penalties Expense75true0us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseSignificant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]76false0us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefitus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-41000000-41000000falsefalsefalsefalsefalse2truefalsefalse-31000000-31000000falsefalsefalsefalsefalse3truefalsefalse-26000000-26000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph d falsefalseSignificant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit77false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosureincometaxesdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalseUSDtruefalse{dei_LegalEntityAxis} : San Diego Gas and Electric Company and Subsidiary [Member] 1/1/2010 - 12/31/2010 USD ($) $FROM_Jan01_2010_TO_Dec31_2010_dei_LegalEntityAxis_SanDiegoGasAndElectricCompanyAndSubsidiaryMemberhttp://www.sec.gov/CIK0001032208duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseSan Diego Gas and Electric Company and Subsidiary [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldisre_SanDiegoGasAndElectricCompanyAndSubsidiaryMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$5falsefalseUSDtruefalse{dei_LegalEntityAxis} : San Diego Gas and Electric Company and Subsidiary [Member] 1/1/2009 - 12/31/2009 USD ($) $FROM_Jan01_2009_TO_Dec31_2009_dei_LegalEntityAxis_SanDiegoGasAndElectricCompanyAndSubsidiaryMemberhttp://www.sec.gov/CIK0001032208duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseSan Diego Gas and Electric Company and Subsidiary [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldisre_SanDiegoGasAndElectricCompanyAndSubsidiaryMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$6falsefalseUSDtruefalse{dei_LegalEntityAxis} : San Diego Gas and Electric Company and Subsidiary [Member] 1/1/2008 - 12/31/2008 USD ($) $FROM_Jan01_2008_TO_Dec31_2008_dei_LegalEntityAxis_SanDiegoGasAndElectricCompanyAndSubsidiaryMemberhttp://www.sec.gov/CIK0001032208duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseSan Diego Gas and Electric Company and Subsidiary [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldisre_SanDiegoGasAndElectricCompanyAndSubsidiaryMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseSan Diego Gas and Electric Company and Subsidiary [Member]78true0sre_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationLineItemssrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseEffective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Line Items]79false0us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRateus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.350.35falsefalsefalsefalsefalse2truetruefalse0.350.35falsefalsefalsefalsefalse3truetruefalse0.350.35falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureThe domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate shall be the regular tax rate if there are alternative tax systems.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 47 falsefalseEffective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate80false0us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepreciationus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.050.05falsefalsefalsefalsefalse2truetruefalse0.040.04falsefalsefalsefalsefalse3truetruefalse0.040.04falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureThe portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the different depreciation methods allowed under generally accepted accounting principles and enacted tax laws.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, Nondeductible Expense, Depreciation81false0us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxesus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.040.04falsefalsefalsefalsefalse2truetruefalse0.040.04falsefalsefalsefalsefalse3truetruefalse0.050.05falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureThe portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the state and local income tax expense (benefit), net of the federal tax benefit (expense) thereon, recorded during the period.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, State and Local Income Taxes82false0sre_EffectiveIncomeTaxRateReconciliationAllowanceForEquityFundsUsedDuringConstructionsrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.03-0.03falsefalsefalsefalsefalse2truetruefalse-0.02-0.02falsefalsefalsefalsefalse3truetruefalse-0.02-0.02falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, Allowance For Equity Funds Used During Construction83false0us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxesus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.03-0.03falsefalsefalsefalsefalse2truetruefalse-0.01-0.01falsefalsefalsefalsefalse3truetruefalse-0.03-0.03falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureThe portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to revisions in previously reported amounts of income tax provision.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, Prior Year Income Taxes84false0sre_EffectiveIncomeTaxRateReconciliationUtilityRepairAllowancesrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.02-0.02falsefalsefalsefalsefalse2truetruefalse-0.01-0.01falsefalsefalsefalsefalse3truetruefalse-0.02-0.02falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, Utility Repair Allowance85false0sre_EffectiveIncomeTaxRateReconciliationSelfDevelopedSoftwareExpendituressrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.02-0.02falsefalsefalsefalsefalse2truetruefalse-0.02-0.02falsefalsefalsefalsefalse3truetruefalse-0.03-0.03falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, Self Developed Software Expenditures86false0sre_EffectiveIncomeTaxRateReconciliationVariableInterestEntitiessrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.010.01falsefalsefalsefalsefalse2truetruefalse-0.02-0.02falsefalsefalsefalsefalse3truetruefalse0.040.04falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, Variable Interest Entities87false0us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRateus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.010.01falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalse3falsetruefalse00falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureThe portion of the difference between total income tax expense (benefit) as reported in the Income Statement and the expected income tax expense (benefit) that is attributable to changes in the income tax laws or rates.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph g falsefalseEffective Income Tax Rate Reconciliation, Change in Enacted Tax Rate88false0us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustmentsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.03-0.03falsefalsefalsefalsefalse2truetruefalse-0.03-0.03falsefalsefalsefalsefalse3truetruefalse-0.02-0.02falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureThe portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to all other items not otherwise listed in the existing taxonomy.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, Other Adjustments89false0us-gaap_EffectiveIncomeTaxRateContinuingOperationsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truetruefalse0.330.33falsefalsefalsefalsefalse2truetruefalse0.320.32falsefalsefalsefalsefalse3truetruefalse0.360.36falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureA ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 47 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 2 -Article 4 truefalseEffective Income Tax Rate, Continuing Operations90false0us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestmentsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse531000000531000000falsefalsefalsefalsefalse2truefalsefalse550000000550000000falsefalsefalsefalsefalse3truefalsefalse451000000451000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetarySum of operating profit and nonoperating income (expense) before income (loss) from equity method investments, income taxes, extraordinary items, cumulative effects of changes in accounting principles, and noncontrolling interest.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 1(i) -Article 4 truefalseIncome before income taxes and equity earnings of certain unconsolidated subsidiaries91true0sre_IncomeTaxExpenseBenefitContinuingOperationsLineItemssrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseIncome Tax Expense (Benefit), Continuing Operations [Line Items]92false0us-gaap_CurrentFederalTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse6900000069000000falsefalsefalsefalsefalse2truefalsefalse7000000070000000falsefalsefalsefalsefalse3truefalsefalse2500000025000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of income tax expense for the period representing amounts paid or payable (or refundable) as determined by applying the provisions of enacted federal tax law to the domestic taxable income (loss) from continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Paragraph Question 1-7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 289 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 falsefalseCurrent Federal Tax Expense (Benefit)93false0us-gaap_CurrentStateAndLocalTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse5200000052000000falsefalsefalsefalsefalse2truefalsefalse3400000034000000falsefalsefalsefalsefalse3truefalsefalse2300000023000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of income tax expense for the period representing amounts paid or payable (or refundable) as determined by applying the provisions of enacted state and local tax law to relevant amounts of taxable income (loss) from continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 289 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 falsefalseCurrent State and Local Tax Expense (Benefit)94false0us-gaap_CurrentIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse121000000121000000falsefalsefalsefalsefalse2truefalsefalse104000000104000000falsefalsefalsefalsefalse3truefalsefalse4800000048000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of income tax expense for the period representing amounts of income taxes paid or payable (or refundable) for the period for all income tax obligations as determined by applying the provisions of relevant enacted tax laws to relevant amounts of taxable income (loss) from continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 289 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph a truefalseCurrent Income Tax Expense (Benefit)95false0us-gaap_DeferredFederalIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse7500000075000000falsefalsefalsefalsefalse2truefalsefalse7500000075000000falsefalsefalsefalsefalse3truefalsefalse107000000107000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of total income tax expense for the period comprised of the net change during the period in the entity's domestic deferred tax assets and liabilities attributable to continuing operations as determined by applying the provisions of the federally enacted tax law.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 8, 16, 17, 289 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph b falsefalseDeferred Federal Income Tax Expense (Benefit)96false0us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-21000000-21000000falsefalsefalsefalsefalse2truefalsefalse-2000000-2000000falsefalsefalsefalsefalse3truefalsefalse80000008000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of total income tax expense for the period comprised of the net change in the entity's state and local deferred tax assets and liabilities attributable to continuing operations as determined by applying the provisions of the applicable enacted tax laws.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 8, 16, 17, 289 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph b falsefalseDeferred State and Local Income Tax Expense (Benefit)97false0us-gaap_DeferredIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse5400000054000000falsefalsefalsefalsefalse2truefalsefalse7300000073000000falsefalsefalsefalsefalse3truefalsefalse115000000115000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of income tax expense for the period representing the net change in the entity's deferred tax assets and liabilities pertaining to continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 289 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 truefalseDeferred Income Tax Expense (Benefit)98false0us-gaap_InvestmentTaxCreditus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-2000000-2000000falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse-2000000-2000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount deducted from an entities' taxes, reflecting a percentage of an amount invested in certain assets spread over the useful life of those assets; includes deferred investment tax credits.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseInvestment Tax Credit99false0us-gaap_IncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse173000000173000000falsefalsefalsefalsefalse2truefalsefalse177000000177000000falsefalsefalsefalsefalse3truefalsefalse161000000161000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe sum of the current income tax expense (benefit) and the deferred income tax expense (benefit) pertaining to continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph a, b truefalseIncome tax expense (benefit)100true0sre_DeferredTaxAssetsAndLiabilitiesLineItemssrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseDeferred Tax Assets And Liabilities [Line Items]101false0us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipmentus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse982000000982000000falsefalsefalsefalsefalse2truefalsefalse737000000737000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount as of the balance sheet date of the estimated future tax effects attributable to the difference between the tax basis of capital assets and the basis of capital assets computed in accordance with generally accepted accounting principles. The difference in basis, attributable to different capitalization of costs, depreciation, or amortization methodologies, will increase future taxable income when such basis difference is realized. Capital assets include but are not limited to assets such as land, real estate, leasehold improvements, machinery and equipment and furniture and fixtures.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph d, e, f falsefalseDeferred Tax Liabilities, Property, Plant and Equipment102false0us-gaap_DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilitiesus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse230000000230000000falsefalsefalsefalsefalse2truefalsefalse190000000190000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount as of the balance sheet date of the estimated future tax effects arising from differences in accounting under GAAP and tax returns for assets and liabilities established under GAAP pertaining to rate-setting.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11, 43 falsefalseDeferred Tax Liabilities, Regulatory Assets and Liabilities103false0sre_DeferredTaxLiabilitiesLossOnReacquiredDebtsrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse70000007000000falsefalsefalsefalsefalse2truefalsefalse80000008000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseDeferred Tax Liabilities, Loss On Reacquired Debt104false0sre_DeferredTaxLiabilitiesPropertyTaxessrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse2500000025000000falsefalsefalsefalsefalse2truefalsefalse2400000024000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseDeferred Tax Liabilities, Property Taxes105false0us-gaap_DeferredTaxLiabilitiesOtherus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1700000017000000falsefalsefalsefalsefalse2truefalsefalse1600000016000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cumulative amount of the estimated future tax effects attributable to other temporary differences not otherwise specified in this taxonomy that were expensed for tax purposes but capitalized in conformity with generally accepted accounting principles, or which were recognized as revenue under GAAP but not for tax purposes, which will reverse in future periods.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph a, d, e falsefalseDeferred Tax Liabilities, Other106false0us-gaap_DeferredTaxLiabilitiesus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse12610000001261000000falsefalsefalsefalsefalse2truefalsefalse975000000975000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cumulative amount of all deferred tax liabilities, which result from applying the applicable tax rate to net taxable temporary differences pertaining to each jurisdiction to which the entity is obligated to pay income tax. A taxable temporary difference is a difference between the tax basis and the carrying amount of an asset or liability in the financial statements prepared in accordance with generally accepted accounting principles that will result in taxable amounts in one or more future periods.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 42, 43 truefalseDeferred Tax Liabilities107false0us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusinessus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1700000017000000falsefalsefalsefalsefalse2truefalsefalse1800000018000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe tax effect as of the balance sheet date of the amount of future tax deductions arising from unused general business tax credit carryforwards. The general business tax credits are the sum of numerous tax credits which include, but are not limited to, investment tax , alcohol fuels, low income housing, alternative fuels, alternative motor vehicles, hurricane relief, disabled access, renewable resources electricity production, employer social security, orphan drug, new markets, employer provided child care facilities and services, biodiesel fuels, low sulfur diesel fuel production, distilled spirits, and the advanced nuclear power facilities credit. A tax credit carryforward is the amount by which tax credits available for utilization exceeded statutory limits on inclusion in historical filings. They can only be utilized if sufficient tax-basis income is generated in future periods and providing tax laws continue to allow such utilization.No authoritative reference available.falsefalseDeferred Tax Assets, Tax Credit Carryforwards, General Business108false0us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOtherus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1400000014000000falsefalsefalsefalsefalse2truefalsefalse1700000017000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from forms of compensation and benefit costs not otherwise specified in the taxonomy, which can only be deducted for tax purposes when actual costs are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph b falsefalseDeferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Other109false0us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefitsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse126000000126000000falsefalsefalsefalsefalse2truefalsefalse152000000152000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe tax effect as of the balance sheet date of the amount of estimated future tax deductions arising from postretirement benefits, which can only be deducted for tax purposes when actual costs are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph b falsefalseDeferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits110false0us-gaap_DeferredTaxAssetsOtherus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse70000007000000falsefalsefalsefalsefalse2truefalsefalse50000005000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe tax effect as of the balance sheet date of the amount of estimated future tax deductions arising from other temporary differences not otherwise specified in the taxonomy.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 falsefalseDeferred Tax Assets, Other111false0sre_DeferredTaxAssetsStateIncomeTaxessrefalsedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse3300000033000000falsefalsefalsefalsefalse2truefalsefalse2500000025000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseDeferred Tax Assets, State Income Taxes112false0us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReservesus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse192000000192000000falsefalsefalsefalsefalse2truefalsefalse2500000025000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from estimates of loss reserves, other than estimated credit losses, which can only be deducted for tax purposes when actual losses are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph b falsefalseDeferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Loss Reserves113false0us-gaap_DeferredTaxAssetsNetus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse389000000389000000falsefalsefalsefalsefalse2truefalsefalse242000000242000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe aggregate tax effects as of the balance sheet date of all future tax deductions arising from temporary differences between tax basis and generally accepted accounting principles basis recognition of assets, liabilities, revenues and expenses, which can only be deducted for tax purposes when permitted under enacted tax laws; net of deducting the allocated valuation allowance, if any, to reduce such amount to net realizable value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 truefalseDeferred Tax Assets, Net114false0sre_DeferredTaxLiabilitiesNetsrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse872000000872000000falsefalsefalsefalsefalse2truefalsefalse733000000733000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.truefalseNet deferred income tax liability115false0sre_DeferredTaxAssetsLiabilitiesCurrentNetsrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-129000000-129000000falsefalsefalsefalsefalse2truefalsefalse-41000000-41000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseDeferred Tax (Assets) Liabilities, Current, Net116false0sre_DeferredTaxAssetsLiabilitiesNoncurrentNetsrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse10010000001001000000falsefalsefalsefalsefalse2truefalsefalse774000000774000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseDeferred Tax (Assets) Liabilities, Noncurrent, Net119true0sre_UnrecognizedTaxBenefitsLineItemssrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseUnrecognized Tax Benefits [Line Items]120false0us-gaap_UnrecognizedTaxBenefitsus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsetruefalsefalseperiodstartlabel1truefalsefalse1400000014000000falsefalsefalsefalsefalse2truefalsefalse1800000018000000falsefalsefalsefalsefalse3truefalsefalse2600000026000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe gross amount of unrecognized tax benefits (tax reductions recognized in financial reports but excluded from tax returns) pertaining to uncertain tax positions taken in tax returns as of the beginning balance sheet date, excluding amounts pertaining to examined tax returns.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a falsefalseUnrecognized Tax Benefits, Balance as of January 1121false0us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositionsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse10000001000000falsefalsefalsefalsefalse3truefalsefalse20000002000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe gross amount of increases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a(1) falsefalseUnrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions122false0us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositionsus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse30000003000000falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe gross amount of decreases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a(1) falsefalseUnrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions123false0us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositionsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse30000003000000falsefalsefalsefalsefalse2truefalsefalse30000003000000falsefalsefalsefalsefalse3truefalsefalse30000003000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe gross amount of increases in unrecognized tax benefits resulting from tax positions that have been or will be taken in the tax return for the current period, excluding amounts pertaining to examined tax returns.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a(2) falsefalseUnrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions124false0us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositionsus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse10000001000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe gross amount of decreases in unrecognized tax benefits resulting from tax positions that have been or will be taken in the tax return for the current period, excluding amounts pertaining to examined tax returns.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a(2) falsefalseUnrecognized Tax Benefits, Decreases Resulting from Current Period Tax Positions125false0us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthoritiesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse90000009000000falsefalsefalsefalsefalse2truefalsefalse80000008000000falsefalsefalsefalsefalse3truefalsefalse1200000012000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe gross amount of decreases in unrecognized tax benefits resulting from settlements with taxing authorities.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a(3) falsefalseUnrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities126false0us-gaap_UnrecognizedTaxBenefitsus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsetruefalseperiodendlabel1truefalsefalse50000005000000falsefalsefalsefalsefalse2truefalsefalse1400000014000000falsefalsefalsefalsefalse3truefalsefalse1800000018000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe gross amount of unrecognized tax benefits (tax reductions recognized in financial reports but excluded from tax returns) pertaining to uncertain tax positions taken in tax returns as of the beginning balance sheet date, excluding amounts pertaining to examined tax returns.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a falsefalseUnrecognized Tax Benefits, Balance as of December 31127false0sre_UnrecognizedTaxBenefitsThatWouldDecreaseEffectiveTaxRatesrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse50000005000000falsefalsefalsefalsefalse2truefalsefalse1300000013000000falsefalsefalsefalsefalse3truefalsefalse1700000017000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseOf the total, amounts related to tax positions that, if recognized, in future years, would decrease the effective tax rate128false0sre_UnrecognizedTaxBenefitsThatWouldIncreaseEffectiveTaxRatesrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse50000005000000falsefalsefalsefalsefalse2truefalsefalse1300000013000000falsefalsefalsefalsefalse3truefalsefalse1700000017000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseOf the total, amounts related to tax positions that, if recognized, in future years, would increase the effective tax rate129false0us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-3000000-3000000falsefalsefalsefalsefalse2truefalsefalse-2000000-2000000falsefalsefalsefalsefalse3truefalsefalse20000002000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis element represents interest expense recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph c Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 15 falsefalseUnrecognized Tax Benefits, Interest on Income Taxes Expense131false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosureincometaxesdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse7falsefalseUSDtruefalse{dei_LegalEntityAxis} : Pacific Enterprises [Member] 1/1/2010 - 12/31/2010 USD ($) $FROM_Jan01_2010_TO_Dec31_2010_dei_LegalEntityAxis_PacificEnterprisesMemberhttp://www.sec.gov/CIK0001032208duration2010-01-01T00:00:002010-12-31T00:00:00falsefalsePacific Enterprises [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldisre_PacificEnterprisesMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$8falsefalseUSDtruefalse{dei_LegalEntityAxis} : Pacific Enterprises [Member] 1/1/2009 - 12/31/2009 USD ($) $FROM_Jan01_2009_TO_Dec31_2009_dei_LegalEntityAxis_PacificEnterprisesMemberhttp://www.sec.gov/CIK0001032208duration2009-01-01T00:00:002009-12-31T00:00:00falsefalsePacific Enterprises [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldisre_PacificEnterprisesMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$9falsefalseUSDtruefalse{dei_LegalEntityAxis} : Pacific Enterprises [Member] 1/1/2008 - 12/31/2008 USD ($) $FROM_Jan01_2008_TO_Dec31_2008_dei_LegalEntityAxis_PacificEnterprisesMemberhttp://www.sec.gov/CIK0001032208duration2008-01-01T00:00:002008-12-31T00:00:00falsefalsePacific Enterprises [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldisre_PacificEnterprisesMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalsePacific Enterprises [Member]132true0sre_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationLineItemssrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseEffective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Line Items]133false0us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRateus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.350.35falsefalsefalsefalsefalse2truetruefalse0.350.35falsefalsefalsefalsefalse3truetruefalse0.350.35falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureThe domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate shall be the regular tax rate if there are alternative tax systems.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 47 falsefalseEffective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate134false0us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepreciationus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.050.05falsefalsefalsefalsefalse2truetruefalse0.060.06falsefalsefalsefalsefalse3truetruefalse0.050.05falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureThe portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the different depreciation methods allowed under generally accepted accounting principles and enacted tax laws.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, Nondeductible Expense, Depreciation135false0us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxesus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.040.04falsefalsefalsefalsefalse2truetruefalse0.040.04falsefalsefalsefalsefalse3truetruefalse0.040.04falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureThe portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the state and local income tax expense (benefit), net of the federal tax benefit (expense) thereon, recorded during the period.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, State and Local Income Taxes136false0sre_EffectiveIncomeTaxRateReconciliationSelfDevelopedSoftwareExpendituressrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.06-0.06falsefalsefalsefalsefalse2truetruefalse-0.06-0.06falsefalsefalsefalsefalse3truetruefalse-0.03-0.03falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, Self Developed Software Expenditures137false0us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRateus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.030.03falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalse3falsetruefalse00falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureThe portion of the difference between total income tax expense (benefit) as reported in the Income Statement and the expected income tax expense (benefit) that is attributable to changes in the income tax laws or rates.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph g falsefalseEffective Income Tax Rate Reconciliation, Change in Enacted Tax Rate138false0us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustmentsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.03-0.03falsefalsefalsefalsefalse2truetruefalse-0.04-0.04falsefalsefalsefalsefalse3truetruefalse-0.05-0.05falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureThe portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to all other items not otherwise listed in the existing taxonomy.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, Other Adjustments139false0us-gaap_EffectiveIncomeTaxRateContinuingOperationsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truetruefalse0.380.38falsefalsefalsefalsefalse2truetruefalse0.350.35falsefalsefalsefalsefalse3truetruefalse0.360.36falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureA ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 47 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 2 -Article 4 truefalseEffective Income Tax Rate, Continuing Operations140false0us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestmentsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse465000000465000000falsefalsefalsefalsefalse2truefalsefalse415000000415000000falsefalsefalsefalsefalse3truefalsefalse394000000394000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetarySum of operating profit and nonoperating income (expense) before income (loss) from equity method investments, income taxes, extraordinary items, cumulative effects of changes in accounting principles, and noncontrolling interest.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 1(i) -Article 4 truefalseIncome before income taxes and equity earnings of certain unconsolidated subsidiaries141true0sre_IncomeTaxExpenseBenefitContinuingOperationsLineItemssrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseIncome Tax Expense (Benefit), Continuing Operations [Line Items]142false0us-gaap_CurrentFederalTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse3800000038000000falsefalsefalsefalsefalse2truefalsefalse5200000052000000falsefalsefalsefalsefalse3truefalsefalse2800000028000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of income tax expense for the period representing amounts paid or payable (or refundable) as determined by applying the provisions of enacted federal tax law to the domestic taxable income (loss) from continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Paragraph Question 1-7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 289 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 falsefalseCurrent Federal Tax Expense (Benefit)143false0us-gaap_CurrentStateAndLocalTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse2500000025000000falsefalsefalsefalsefalse2truefalsefalse2100000021000000falsefalsefalsefalsefalse3truefalsefalse2100000021000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of income tax expense for the period representing amounts paid or payable (or refundable) as determined by applying the provisions of enacted state and local tax law to relevant amounts of taxable income (loss) from continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 289 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 falsefalseCurrent State and Local Tax Expense (Benefit)144false0us-gaap_CurrentIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse6300000063000000falsefalsefalsefalsefalse2truefalsefalse7300000073000000falsefalsefalsefalsefalse3truefalsefalse4900000049000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of income tax expense for the period representing amounts of income taxes paid or payable (or refundable) for the period for all income tax obligations as determined by applying the provisions of relevant enacted tax laws to relevant amounts of taxable income (loss) from continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 289 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph a truefalseCurrent Income Tax Expense (Benefit)145false0us-gaap_DeferredFederalIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse112000000112000000falsefalsefalsefalsefalse2truefalsefalse6800000068000000falsefalsefalsefalsefalse3truefalsefalse8900000089000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of total income tax expense for the period comprised of the net change during the period in the entity's domestic deferred tax assets and liabilities attributable to continuing operations as determined by applying the provisions of the federally enacted tax law.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 8, 16, 17, 289 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph b falsefalseDeferred Federal Income Tax Expense (Benefit)146false0us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse30000003000000falsefalsefalsefalsefalse2truefalsefalse70000007000000falsefalsefalsefalsefalse3truefalsefalse60000006000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of total income tax expense for the period comprised of the net change in the entity's state and local deferred tax assets and liabilities attributable to continuing operations as determined by applying the provisions of the applicable enacted tax laws.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 8, 16, 17, 289 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph b falsefalseDeferred State and Local Income Tax Expense (Benefit)147false0us-gaap_DeferredIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse115000000115000000falsefalsefalsefalsefalse2truefalsefalse7500000075000000falsefalsefalsefalsefalse3truefalsefalse9500000095000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of income tax expense for the period representing the net change in the entity's deferred tax assets and liabilities pertaining to continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 289 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 truefalseDeferred Income Tax Expense (Benefit)148false0us-gaap_InvestmentTaxCreditus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-3000000-3000000falsefalsefalsefalsefalse2truefalsefalse-3000000-3000000falsefalsefalsefalsefalse3truefalsefalse-3000000-3000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount deducted from an entities' taxes, reflecting a percentage of an amount invested in certain assets spread over the useful life of those assets; includes deferred investment tax credits.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseInvestment Tax Credit149false0us-gaap_IncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse175000000175000000falsefalsefalsefalsefalse2truefalsefalse145000000145000000falsefalsefalsefalsefalse3truefalsefalse141000000141000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe sum of the current income tax expense (benefit) and the deferred income tax expense (benefit) pertaining to continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph a, b truefalseIncome tax expense (benefit)150true0sre_DeferredTaxAssetsAndLiabilitiesLineItemssrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseDeferred Tax Assets And Liabilities [Line Items]151false0us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipmentus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse482000000482000000falsefalsefalsefalsefalse2truefalsefalse360000000360000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount as of the balance sheet date of the estimated future tax effects attributable to the difference between the tax basis of capital assets and the basis of capital assets computed in accordance with generally accepted accounting principles. The difference in basis, attributable to different capitalization of costs, depreciation, or amortization methodologies, will increase future taxable income when such basis difference is realized. Capital assets include but are not limited to assets such as land, real estate, leasehold improvements, machinery and equipment and furniture and fixtures.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph d, e, f falsefalseDeferred Tax Liabilities, Property, Plant and Equipment152false0us-gaap_DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilitiesus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse316000000316000000falsefalsefalsefalsefalse2truefalsefalse322000000322000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount as of the balance sheet date of the estimated future tax effects arising from differences in accounting under GAAP and tax returns for assets and liabilities established under GAAP pertaining to rate-setting.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11, 43 falsefalseDeferred Tax Liabilities, Regulatory Assets and Liabilities153false0sre_DeferredTaxLiabilitiesLossOnReacquiredDebtsrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1000000010000000falsefalsefalsefalsefalse2truefalsefalse1100000011000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseDeferred Tax Liabilities, Loss On Reacquired Debt154false0sre_DeferredTaxLiabilitiesPropertyTaxessrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1400000014000000falsefalsefalsefalsefalse2truefalsefalse1200000012000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseDeferred Tax Liabilities, Property Taxes155false0us-gaap_DeferredTaxLiabilitiesus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse822000000822000000falsefalsefalsefalsefalse2truefalsefalse705000000705000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cumulative amount of all deferred tax liabilities, which result from applying the applicable tax rate to net taxable temporary differences pertaining to each jurisdiction to which the entity is obligated to pay income tax. A taxable temporary difference is a difference between the tax basis and the carrying amount of an asset or liability in the financial statements prepared in accordance with generally accepted accounting principles that will result in taxable amounts in one or more future periods.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 42, 43 truefalseDeferred Tax Liabilities156false0us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusinessus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1700000017000000falsefalsefalsefalsefalse2truefalsefalse1900000019000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe tax effect as of the balance sheet date of the amount of future tax deductions arising from unused general business tax credit carryforwards. The general business tax credits are the sum of numerous tax credits which include, but are not limited to, investment tax , alcohol fuels, low income housing, alternative fuels, alternative motor vehicles, hurricane relief, disabled access, renewable resources electricity production, employer social security, orphan drug, new markets, employer provided child care facilities and services, biodiesel fuels, low sulfur diesel fuel production, distilled spirits, and the advanced nuclear power facilities credit. A tax credit carryforward is the amount by which tax credits available for utilization exceeded statutory limits on inclusion in historical filings. They can only be utilized if sufficient tax-basis income is generated in future periods and providing tax laws continue to allow such utilization.No authoritative reference available.falsefalseDeferred Tax Assets, Tax Credit Carryforwards, General Business157false0us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOtherus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse4100000041000000falsefalsefalsefalsefalse2truefalsefalse5000000050000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from forms of compensation and benefit costs not otherwise specified in the taxonomy, which can only be deducted for tax purposes when actual costs are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph b falsefalseDeferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Other158false0us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefitsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse270000000270000000falsefalsefalsefalsefalse2truefalsefalse283000000283000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe tax effect as of the balance sheet date of the amount of estimated future tax deductions arising from postretirement benefits, which can only be deducted for tax purposes when actual costs are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph b falsefalseDeferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits159false0us-gaap_DeferredTaxAssetsOtherus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1400000014000000falsefalsefalsefalsefalse2truefalsefalse1500000015000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe tax effect as of the balance sheet date of the amount of estimated future tax deductions arising from other temporary differences not otherwise specified in the taxonomy.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 falsefalseDeferred Tax Assets, Other160false0sre_DeferredTaxAssetsStateIncomeTaxessrefalsedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1800000018000000falsefalsefalsefalsefalse2truefalsefalse1600000016000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseDeferred Tax Assets, State Income Taxes161false0us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReservesus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse2100000021000000falsefalsefalsefalsefalse2truefalsefalse3300000033000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from estimates of loss reserves, other than estimated credit losses, which can only be deducted for tax purposes when actual losses are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph b falsefalseDeferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Loss Reserves162false0us-gaap_DeferredTaxAssetsHedgingTransactionsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse90000009000000falsefalsefalsefalsefalse2truefalsefalse1100000011000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe tax effect as of the balance sheet date of the amount of the estimated future tax deductions attributable to hedging transactions which can only be deducted for tax purposes when losses from such transactions are realized, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph b falsefalseDeferred Tax Assets, Hedging Transactions163false0us-gaap_DeferredTaxAssetsNetus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse390000000390000000falsefalsefalsefalsefalse2truefalsefalse427000000427000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe aggregate tax effects as of the balance sheet date of all future tax deductions arising from temporary differences between tax basis and generally accepted accounting principles basis recognition of assets, liabilities, revenues and expenses, which can only be deducted for tax purposes when permitted under enacted tax laws; net of deducting the allocated valuation allowance, if any, to reduce such amount to net realizable value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 truefalseDeferred Tax Assets, Net164false0sre_DeferredTaxLiabilitiesNetsrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse432000000432000000falsefalsefalsefalsefalse2truefalsefalse278000000278000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.truefalseNet deferred income tax liability165false0sre_DeferredTaxAssetsLiabilitiesCurrentNetsrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1600000016000000falsefalsefalsefalsefalse2truefalsefalse50000005000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseDeferred Tax (Assets) Liabilities, Current, Net166false0sre_DeferredTaxAssetsLiabilitiesNoncurrentNetsrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse416000000416000000falsefalsefalsefalsefalse2truefalsefalse273000000273000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseDeferred Tax (Assets) Liabilities, Noncurrent, Net171false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosureincometaxesdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse10falsefalseUSDtruefalse{dei_LegalEntityAxis} : Southern California Gas Company [Member] 1/1/2010 - 12/31/2010 USD ($) $FROM_Jan01_2010_TO_Dec31_2010_dei_LegalEntityAxis_SouthernCaliforniaGasCompanyMemberhttp://www.sec.gov/CIK0001032208duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseSouthern California Gas Company [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldisre_SouthernCaliforniaGasCompanyMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$11falsefalseUSDtruefalse{dei_LegalEntityAxis} : Southern California Gas Company [Member] 1/1/2009 - 12/31/2009 USD ($) $FROM_Jan01_2009_TO_Dec31_2009_dei_LegalEntityAxis_SouthernCaliforniaGasCompanyMemberhttp://www.sec.gov/CIK0001032208duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseSouthern California Gas Company [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldisre_SouthernCaliforniaGasCompanyMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$12falsefalseUSDtruefalse{dei_LegalEntityAxis} : Southern California Gas Company [Member] 1/1/2008 - 12/31/2008 USD ($) $FROM_Jan01_2008_TO_Dec31_2008_dei_LegalEntityAxis_SouthernCaliforniaGasCompanyMemberhttp://www.sec.gov/CIK0001032208duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseSouthern California Gas Company [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldisre_SouthernCaliforniaGasCompanyMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseSouthern California Gas Company [Member]172true0sre_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationLineItemssrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseEffective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Line Items]173false0us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRateus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.350.35falsefalsefalsefalsefalse2truetruefalse0.350.35falsefalsefalsefalsefalse3truetruefalse0.350.35falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureThe domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate shall be the regular tax rate if there are alternative tax systems.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 47 falsefalseEffective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate174false0us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepreciationus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.050.05falsefalsefalsefalsefalse2truetruefalse0.060.06falsefalsefalsefalsefalse3truetruefalse0.060.06falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureThe portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the different depreciation methods allowed under generally accepted accounting principles and enacted tax laws.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, Nondeductible Expense, Depreciation175false0us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxesus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.040.04falsefalsefalsefalsefalse2truetruefalse0.040.04falsefalsefalsefalsefalse3truetruefalse0.040.04falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureThe portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the state and local income tax expense (benefit), net of the federal tax benefit (expense) thereon, recorded during the period.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, State and Local Income Taxes176false0sre_EffectiveIncomeTaxRateReconciliationSelfDevelopedSoftwareExpendituressrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.06-0.06falsefalsefalsefalsefalse2truetruefalse-0.06-0.06falsefalsefalsefalsefalse3truetruefalse-0.03-0.03falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, Self Developed Software Expenditures177false0us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRateus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.030.03falsefalsefalsefalsefalse2falsetruefalse00falsefalsefalsefalsefalse3falsetruefalse00falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureThe portion of the difference between total income tax expense (benefit) as reported in the Income Statement and the expected income tax expense (benefit) that is attributable to changes in the income tax laws or rates.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph g falsefalseEffective Income Tax Rate Reconciliation, Change in Enacted Tax Rate178false0us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustmentsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.03-0.03falsefalsefalsefalsefalse2truetruefalse-0.05-0.05falsefalsefalsefalsefalse3truetruefalse-0.06-0.06falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureThe portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to all other items not otherwise listed in the existing taxonomy.No authoritative reference available.falsefalseEffective Income Tax Rate Reconciliation, Other Adjustments179false0us-gaap_EffectiveIncomeTaxRateContinuingOperationsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truetruefalse0.380.38falsefalsefalsefalsefalse2truetruefalse0.340.34falsefalsefalsefalsefalse3truetruefalse0.360.36falsefalsefalsefalsefalseMonetaryus-types:percentItemTypepureA ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 47 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 2 -Article 4 truefalseEffective Income Tax Rate, Continuing Operations180false0us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestmentsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse463000000463000000falsefalsefalsefalsefalse2truefalsefalse418000000418000000falsefalsefalsefalsefalse3truefalsefalse385000000385000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetarySum of operating profit and nonoperating income (expense) before income (loss) from equity method investments, income taxes, extraordinary items, cumulative effects of changes in accounting principles, and noncontrolling interest.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 1(i) -Article 4 truefalseIncome before income taxes and equity earnings of certain unconsolidated subsidiaries181true0sre_IncomeTaxExpenseBenefitContinuingOperationsLineItemssrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseIncome Tax Expense (Benefit), Continuing Operations [Line Items]182false0us-gaap_CurrentFederalTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse4300000043000000falsefalsefalsefalsefalse2truefalsefalse5200000052000000falsefalsefalsefalsefalse3truefalsefalse3100000031000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of income tax expense for the period representing amounts paid or payable (or refundable) as determined by applying the provisions of enacted federal tax law to the domestic taxable income (loss) from continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Paragraph Question 1-7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 289 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 falsefalseCurrent Federal Tax Expense (Benefit)183false0us-gaap_CurrentStateAndLocalTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse2600000026000000falsefalsefalsefalsefalse2truefalsefalse2200000022000000falsefalsefalsefalsefalse3truefalsefalse2200000022000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of income tax expense for the period representing amounts paid or payable (or refundable) as determined by applying the provisions of enacted state and local tax law to relevant amounts of taxable income (loss) from continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 289 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 falsefalseCurrent State and Local Tax Expense (Benefit)184false0us-gaap_CurrentIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse6900000069000000falsefalsefalsefalsefalse2truefalsefalse7400000074000000falsefalsefalsefalsefalse3truefalsefalse5300000053000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of income tax expense for the period representing amounts of income taxes paid or payable (or refundable) for the period for all income tax obligations as determined by applying the provisions of relevant enacted tax laws to relevant amounts of taxable income (loss) from continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 289 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph a truefalseCurrent Income Tax Expense (Benefit)185false0us-gaap_DeferredFederalIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse108000000108000000falsefalsefalsefalsefalse2truefalsefalse6700000067000000falsefalsefalsefalsefalse3truefalsefalse8500000085000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of total income tax expense for the period comprised of the net change during the period in the entity's domestic deferred tax assets and liabilities attributable to continuing operations as determined by applying the provisions of the federally enacted tax law.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 8, 16, 17, 289 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph b falsefalseDeferred Federal Income Tax Expense (Benefit)186false0us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse20000002000000falsefalsefalsefalsefalse2truefalsefalse60000006000000falsefalsefalsefalsefalse3truefalsefalse50000005000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of total income tax expense for the period comprised of the net change in the entity's state and local deferred tax assets and liabilities attributable to continuing operations as determined by applying the provisions of the applicable enacted tax laws.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 8, 16, 17, 289 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph b falsefalseDeferred State and Local Income Tax Expense (Benefit)187false0us-gaap_DeferredIncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse110000000110000000falsefalsefalsefalsefalse2truefalsefalse7300000073000000falsefalsefalsefalsefalse3truefalsefalse9000000090000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe component of income tax expense for the period representing the net change in the entity's deferred tax assets and liabilities pertaining to continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 289 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 truefalseDeferred Income Tax Expense (Benefit)188false0us-gaap_InvestmentTaxCreditus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-3000000-3000000falsefalsefalsefalsefalse2truefalsefalse-3000000-3000000falsefalsefalsefalsefalse3truefalsefalse-3000000-3000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount deducted from an entities' taxes, reflecting a percentage of an amount invested in certain assets spread over the useful life of those assets; includes deferred investment tax credits.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 falsefalseInvestment Tax Credit189false0us-gaap_IncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse176000000176000000falsefalsefalsefalsefalse2truefalsefalse144000000144000000falsefalsefalsefalsefalse3truefalsefalse140000000140000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe sum of the current income tax expense (benefit) and the deferred income tax expense (benefit) pertaining to continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph a, b truefalseIncome tax expense (benefit)190true0sre_DeferredTaxAssetsAndLiabilitiesLineItemssrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseDeferred Tax Assets And Liabilities [Line Items]191false0us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipmentus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse483000000483000000falsefalsefalsefalsefalse2truefalsefalse363000000363000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount as of the balance sheet date of the estimated future tax effects attributable to the difference between the tax basis of capital assets and the basis of capital assets computed in accordance with generally accepted accounting principles. The difference in basis, attributable to different capitalization of costs, depreciation, or amortization methodologies, will increase future taxable income when such basis difference is realized. Capital assets include but are not limited to assets such as land, real estate, leasehold improvements, machinery and equipment and furniture and fixtures.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph d, e, f falsefalseDeferred Tax Liabilities, Property, Plant and Equipment192false0us-gaap_DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilitiesus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse316000000316000000falsefalsefalsefalsefalse2truefalsefalse322000000322000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount as of the balance sheet date of the estimated future tax effects arising from differences in accounting under GAAP and tax returns for assets and liabilities established under GAAP pertaining to rate-setting.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11, 43 falsefalseDeferred Tax Liabilities, Regulatory Assets and Liabilities193false0sre_DeferredTaxLiabilitiesLossOnReacquiredDebtsrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1000000010000000falsefalsefalsefalsefalse2truefalsefalse1100000011000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseDeferred Tax Liabilities, Loss On Reacquired Debt194false0sre_DeferredTaxLiabilitiesPropertyTaxessrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1400000014000000falsefalsefalsefalsefalse2truefalsefalse1200000012000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseDeferred Tax Liabilities, Property Taxes195false0us-gaap_DeferredTaxLiabilitiesOtherus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-1000000-1000000falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cumulative amount of the estimated future tax effects attributable to other temporary differences not otherwise specified in this taxonomy that were expensed for tax purposes but capitalized in conformity with generally accepted accounting principles, or which were recognized as revenue under GAAP but not for tax purposes, which will reverse in future periods.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph a, d, e falsefalseDeferred Tax Liabilities, Other196false0us-gaap_DeferredTaxLiabilitiesus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse822000000822000000falsefalsefalsefalsefalse2truefalsefalse708000000708000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe cumulative amount of all deferred tax liabilities, which result from applying the applicable tax rate to net taxable temporary differences pertaining to each jurisdiction to which the entity is obligated to pay income tax. A taxable temporary difference is a difference between the tax basis and the carrying amount of an asset or liability in the financial statements prepared in accordance with generally accepted accounting principles that will result in taxable amounts in one or more future periods.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 42, 43 truefalseDeferred Tax Liabilities197false0us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusinessus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1700000017000000falsefalsefalsefalsefalse2truefalsefalse1900000019000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe tax effect as of the balance sheet date of the amount of future tax deductions arising from unused general business tax credit carryforwards. The general business tax credits are the sum of numerous tax credits which include, but are not limited to, investment tax , alcohol fuels, low income housing, alternative fuels, alternative motor vehicles, hurricane relief, disabled access, renewable resources electricity production, employer social security, orphan drug, new markets, employer provided child care facilities and services, biodiesel fuels, low sulfur diesel fuel production, distilled spirits, and the advanced nuclear power facilities credit. A tax credit carryforward is the amount by which tax credits available for utilization exceeded statutory limits on inclusion in historical filings. They can only be utilized if sufficient tax-basis income is generated in future periods and providing tax laws continue to allow such utilization.No authoritative reference available.falsefalseDeferred Tax Assets, Tax Credit Carryforwards, General Business198false0us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOtherus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse4100000041000000falsefalsefalsefalsefalse2truefalsefalse5100000051000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from forms of compensation and benefit costs not otherwise specified in the taxonomy, which can only be deducted for tax purposes when actual costs are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph b falsefalseDeferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Other199false0us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefitsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse272000000272000000falsefalsefalsefalsefalse2truefalsefalse285000000285000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe tax effect as of the balance sheet date of the amount of estimated future tax deductions arising from postretirement benefits, which can only be deducted for tax purposes when actual costs are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph b falsefalseDeferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits200false0us-gaap_DeferredTaxAssetsOtherus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1000000010000000falsefalsefalsefalsefalse2truefalsefalse80000008000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe tax effect as of the balance sheet date of the amount of estimated future tax deductions arising from other temporary differences not otherwise specified in the taxonomy.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 falsefalseDeferred Tax Assets, Other201false0sre_DeferredTaxAssetsStateIncomeTaxessrefalsedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1800000018000000falsefalsefalsefalsefalse2truefalsefalse1600000016000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseDeferred Tax Assets, State Income Taxes202false0us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReservesus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse2000000020000000falsefalsefalsefalsefalse2truefalsefalse3200000032000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from estimates of loss reserves, other than estimated credit losses, which can only be deducted for tax purposes when actual losses are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph b falsefalseDeferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Loss Reserves203false0us-gaap_DeferredTaxAssetsHedgingTransactionsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse90000009000000falsefalsefalsefalsefalse2truefalsefalse1100000011000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe tax effect as of the balance sheet date of the amount of the estimated future tax deductions attributable to hedging transactions which can only be deducted for tax purposes when losses from such transactions are realized, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph b falsefalseDeferred Tax Assets, Hedging Transactions204false0us-gaap_DeferredTaxAssetsNetus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse387000000387000000falsefalsefalsefalsefalse2truefalsefalse422000000422000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe aggregate tax effects as of the balance sheet date of all future tax deductions arising from temporary differences between tax basis and generally accepted accounting principles basis recognition of assets, liabilities, revenues and expenses, which can only be deducted for tax purposes when permitted under enacted tax laws; net of deducting the allocated valuation allowance, if any, to reduce such amount to net realizable value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 truefalseDeferred Tax Assets, Net205false0sre_DeferredTaxLiabilitiesNetsrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse435000000435000000falsefalsefalsefalsefalse2truefalsefalse286000000286000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.truefalseNet deferred income tax liability206false0sre_DeferredTaxAssetsLiabilitiesCurrentNetsrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1700000017000000falsefalsefalsefalsefalse2truefalsefalse60000006000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseDeferred Tax (Assets) Liabilities, Current, Net207false0sre_DeferredTaxAssetsLiabilitiesNoncurrentNetsrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse418000000418000000falsefalsefalsefalsefalse2truefalsefalse280000000280000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseDeferred Tax (Assets) Liabilities, Noncurrent, Net210true0sre_UnrecognizedTaxBenefitsLineItemssrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseUnrecognized Tax Benefits [Line Items]211false0us-gaap_UnrecognizedTaxBenefitsus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsetruefalsefalseperiodstartlabel1truefalsefalse1100000011000000falsefalsefalsefalsefalse2truefalsefalse1900000019000000falsefalsefalsefalsefalse3truefalsefalse4000000040000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe gross amount of unrecognized tax benefits (tax reductions recognized in financial reports but excluded from tax returns) pertaining to uncertain tax positions taken in tax returns as of the beginning balance sheet date, excluding amounts pertaining to examined tax returns.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a falsefalseUnrecognized Tax Benefits, Balance as of January 1212false0us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositionsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse50000005000000falsefalsefalsefalsefalse2truefalsefalse10000001000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe gross amount of increases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a(1) falsefalseUnrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions213false0us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthoritiesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse10000001000000falsefalsefalsefalsefalse3truefalsefalse2100000021000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe gross amount of decreases in unrecognized tax benefits resulting from settlements with taxing authorities.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a(3) falsefalseUnrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities214false0us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitationsus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse80000008000000falsefalsefalsefalsefalse2truefalsefalse80000008000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe gross amount of decreases in unrecognized tax benefits resulting from lapses of the applicable statutes of limitations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a(4) falsefalseUnrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations215false0us-gaap_UnrecognizedTaxBenefitsus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsetruefalseperiodendlabel1truefalsefalse80000008000000falsefalsefalsefalsefalse2truefalsefalse1100000011000000falsefalsefalsefalsefalse3truefalsefalse1900000019000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe gross amount of unrecognized tax benefits (tax reductions recognized in financial reports but excluded from tax returns) pertaining to uncertain tax positions taken in tax returns as of the beginning balance sheet date, excluding amounts pertaining to examined tax returns.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a falsefalseUnrecognized Tax Benefits, Balance as of December 31216false0sre_UnrecognizedTaxBenefitsThatWouldDecreaseEffectiveTaxRatesrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse10000001000000falsefalsefalsefalsefalse2truefalsefalse10000001000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseOf the total, amounts related to tax positions that, if recognized, in future years, would decrease the effective tax rate217false0us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse10000001000000falsefalsefalsefalsefalse3truefalsefalse40000004000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis element represents interest expense recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph c Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 15 falsefalseUnrecognized Tax Benefits, Interest on Income Taxes Expense218false0us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse10000001000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThis element represents the recognized expense for the amount of statutory penalties in the period in which the entity claims or expects to claim a tax position, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties or, if not recognizing the expense in the period in which the tax return was initially filed, the expense shall be recognized in the period in which the enterprise's judgment about meeting the minimum statutory threshold changes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 16 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph c falsefalseUnrecognized Tax Benefits, Income Tax Penalties Expense219true0us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseSignificant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]220false0us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefitus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-5000000-5000000falsefalsefalsefalsefalse2truefalsefalse-7000000-7000000falsefalsefalsefalsefalse3truefalsefalse-6000000-6000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph d falsefalseSignificant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit221false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosureincometaxesdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse13falsefalseUSDtruefalse{dei_LegalEntityAxis} : Southern California Gas Company [Member] {us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis} : Expiration Of Statute Of Limitations [Member] 12/31/2010 USD ($) $AS_OF_Dec31_2010_us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis_ExpirationOfStatuteOfLimitationsMember_dei_LegalEntityAxis_SouthernCaliforniaGasCompanyMemberhttp://www.sec.gov/CIK0001032208instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseSouthern California Gas Company [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldisre_SouthernCaliforniaGasCompanyMemberdei_LegalEntityAxisexplicitMemberfalsefalseExpiration Of Statute Of Limitations [Member]us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxisxbrldihttp://xbrl.org/2006/xbrldisre_ExpirationOfStatuteOfLimitationsMemberus-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$14falsefalseUSDtruefalse{dei_LegalEntityAxis} : Southern California Gas Company [Member] {us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis} : Expiration Of Statute Of Limitations [Member] 12/31/2009 USD ($) $AS_OF_Dec31_2009_us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis_ExpirationOfStatuteOfLimitationsMember_dei_LegalEntityAxis_SouthernCaliforniaGasCompanyMemberhttp://www.sec.gov/CIK0001032208instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseSouthern California Gas Company [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldisre_SouthernCaliforniaGasCompanyMemberdei_LegalEntityAxisexplicitMemberfalsefalseExpiration Of Statute Of Limitations [Member]us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxisxbrldihttp://xbrl.org/2006/xbrldisre_ExpirationOfStatuteOfLimitationsMemberus-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$15falsefalseUSDtruefalse{dei_LegalEntityAxis} : Southern California Gas Company [Member] {us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis} : Expiration Of Statute Of Limitations [Member] 12/31/2008 USD ($) $AS_OF_Dec31_2008_us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis_ExpirationOfStatuteOfLimitationsMember_dei_LegalEntityAxis_SouthernCaliforniaGasCompanyMemberhttp://www.sec.gov/CIK0001032208instant2008-12-31T00:00:000001-01-01T00:00:00falsefalseSouthern California Gas Company [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldisre_SouthernCaliforniaGasCompanyMemberdei_LegalEntityAxisexplicitMemberfalsefalseExpiration Of Statute Of Limitations [Member]us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxisxbrldihttp://xbrl.org/2006/xbrldisre_ExpirationOfStatuteOfLimitationsMemberus-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseSouthern California Gas Company [Member] | Expiration Of Statute Of Limitations [Member]228true0us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseSignificant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]229false0us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefitus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-5000000-5000000falsefalsefalsefalsefalse2truefalsefalse-6000000-6000000falsefalsefalsefalsefalse3truefalsefalse-3000000-3000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph d falsefalseSignificant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit230false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosureincometaxesdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse16falsefalseUSDtruefalse{dei_LegalEntityAxis} : Southern California Gas Company [Member] {us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis} : Potential Resolution Of Audit Issues [Member] 12/31/2009 USD ($) $AS_OF_Dec31_2009_us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis_PotentialResolutionOfAuditIssuesMember_dei_LegalEntityAxis_SouthernCaliforniaGasCompanyMemberhttp://www.sec.gov/CIK0001032208instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseSouthern California Gas Company [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldisre_SouthernCaliforniaGasCompanyMemberdei_LegalEntityAxisexplicitMemberfalsefalsePotential Resolution Of Audit Issues [Member]us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxisxbrldihttp://xbrl.org/2006/xbrldisre_PotentialResolutionOfAuditIssuesMemberus-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseSouthern California Gas Company [Member] | Potential Resolution Of Audit Issues [Member]237true0us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseSignificant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]238false0us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefitus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse-1000000-1000000falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph d falsefalseSignificant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit239false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosureincometaxesdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse17falsefalseUSDtruefalse{dei_LegalEntityAxis} : Southern California Gas Company [Member] {us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis} : Federal And State Timing Items Affecting Taxable Income [Member] 12/31/2008 USD ($) $AS_OF_Dec31_2008_us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis_FederalAndStateTimingItemsAffectingTaxableIncomeMember_dei_LegalEntityAxis_SouthernCaliforniaGasCompanyMemberhttp://www.sec.gov/CIK0001032208instant2008-12-31T00:00:000001-01-01T00:00:00falsefalseSouthern California Gas Company [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldisre_SouthernCaliforniaGasCompanyMemberdei_LegalEntityAxisexplicitMemberfalsefalseFederal And State Timing Items Affecting Taxable Income [Member]us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxisxbrldihttp://xbrl.org/2006/xbrldisre_FederalAndStateTimingItemsAffectingTaxableIncomeMemberus-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseSouthern California Gas Company [Member] | Federal And State Timing Items Affecting Taxable Income [Member]246true0us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseSignificant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]247false0us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefitus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse-3000000-3000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph d falsefalseSignificant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit248false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosureincometaxesdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse18falsefalseUSDtruefalse{us-gaap_ValuationAllowanceByDeferredTaxAssetAxis} : Deferred Tax Asset Valuation Allowance, Variable Interest Entities [Member] 12/31/2010 USD ($) $AS_OF_Dec31_2010_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_DeferredTaxAssetValuationAllowanceVariableInterestEntitiesMemberhttp://www.sec.gov/CIK0001032208instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseDeferred Tax Asset Valuation Allowance, Variable Interest Entities [Member]us-gaap_ValuationAllowanceByDeferredTaxAssetAxisxbrldihttp://xbrl.org/2006/xbrldisre_DeferredTaxAssetValuationAllowanceVariableInterestEntitiesMemberus-gaap_ValuationAllowanceByDeferredTaxAssetAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseDeferred Tax Asset Valuation Allowance, Variable Interest Entities [Member]252true0us-gaap_ValuationAllowanceLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseValuation Allowance [Line Items]253false0us-gaap_ValuationAllowanceAmountus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse111000000111000000falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of the valuation allowance recorded as of the balance sheet date pertaining to the specified deferred tax asset for which an assessment was made that it is more likely than not that all or a portion of such deferred tax asset will not be realized through related deductions on future tax returns.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 -Subparagraph c falsefalseValuation Allowance, Amount257false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosureincometaxesdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse19falsefalseUSDtruefalse{us-gaap_ValuationAllowanceByDeferredTaxAssetAxis} : Deferred Tax Asset Valuation Allowance, Foreign Net Operating Losses [Member] 12/31/2010 USD ($) $AS_OF_Dec31_2010_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_DeferredTaxAssetValuationAllowanceForeignNetOperatingLossesMemberhttp://www.sec.gov/CIK0001032208instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseDeferred Tax Asset Valuation Allowance, Foreign Net Operating Losses [Member]us-gaap_ValuationAllowanceByDeferredTaxAssetAxisxbrldihttp://xbrl.org/2006/xbrldisre_DeferredTaxAssetValuationAllowanceForeignNetOperatingLossesMemberus-gaap_ValuationAllowanceByDeferredTaxAssetAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseDeferred Tax Asset Valuation Allowance, Foreign Net Operating Losses [Member]261true0us-gaap_ValuationAllowanceLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseValuation Allowance [Line Items]262false0us-gaap_ValuationAllowanceAmountus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1800000018000000falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of the valuation allowance recorded as of the balance sheet date pertaining to the specified deferred tax asset for which an assessment was made that it is more likely than not that all or a portion of such deferred tax asset will not be realized through related deductions on future tax returns.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 -Subparagraph c falsefalseValuation Allowance, Amount266false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosureincometaxesdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse20falsefalseUSDtruefalse{us-gaap_ValuationAllowanceByDeferredTaxAssetAxis} : Deferred Tax Asset Valuation Allowance, Future Foreign Deductions [Member] 12/31/2010 USD ($) $AS_OF_Dec31_2010_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_DeferredTaxAssetValuationAllowanceFutureForeignDeductionsMemberhttp://www.sec.gov/CIK0001032208instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseDeferred Tax Asset Valuation Allowance, Future Foreign Deductions [Member]us-gaap_ValuationAllowanceByDeferredTaxAssetAxisxbrldihttp://xbrl.org/2006/xbrldisre_DeferredTaxAssetValuationAllowanceFutureForeignDeductionsMemberus-gaap_ValuationAllowanceByDeferredTaxAssetAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseDeferred Tax Asset Valuation Allowance, Future Foreign Deductions [Member]270true0us-gaap_ValuationAllowanceLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseValuation Allowance [Line Items]271false0us-gaap_ValuationAllowanceAmountus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse70000007000000falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of the valuation allowance recorded as of the balance sheet date pertaining to the specified deferred tax asset for which an assessment was made that it is more likely than not that all or a portion of such deferred tax asset will not be realized through related deductions on future tax returns.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 -Subparagraph c falsefalseValuation Allowance, Amount275false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosureincometaxesdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse21falsefalseUSDtruefalse{us-gaap_ValuationAllowanceByDeferredTaxAssetAxis} : Deferred Tax Asset Valuation Allowance, Federal State And Local Net Operating Losses [Member] 12/31/2010 USD ($) $AS_OF_Dec31_2010_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_DeferredTaxAssetValuationAllowanceFederalStateAndLocalNetOperatingLossesMemberhttp://www.sec.gov/CIK0001032208instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseDeferred Tax Asset Valuation Allowance, Federal State And Local Net Operating Losses [Member]us-gaap_ValuationAllowanceByDeferredTaxAssetAxisxbrldihttp://xbrl.org/2006/xbrldisre_DeferredTaxAssetValuationAllowanceFederalStateAndLocalNetOperatingLossesMemberus-gaap_ValuationAllowanceByDeferredTaxAssetAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseDeferred Tax Asset Valuation Allowance, Federal State And Local Net Operating Losses [Member]279true0us-gaap_ValuationAllowanceLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseValuation Allowance [Line Items]280false0us-gaap_ValuationAllowanceAmountus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse2200000022000000falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of the valuation allowance recorded as of the balance sheet date pertaining to the specified deferred tax asset for which an assessment was made that it is more likely than not that all or a portion of such deferred tax asset will not be realized through related deductions on future tax returns.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 -Subparagraph c falsefalseValuation Allowance, Amount284false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosureincometaxesdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse22falsefalseUSDtruefalse{us-gaap_ValuationAllowanceByDeferredTaxAssetAxis} : Deferred Tax Asset Valuation Allowance, Future Federal State And Local Deductions [Member] 12/31/2010 USD ($) $AS_OF_Dec31_2010_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_DeferredTaxAssetValuationAllowanceFutureFederalStateAndLocalDeductionsMemberhttp://www.sec.gov/CIK0001032208instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseDeferred Tax Asset Valuation Allowance, Future Federal State And Local Deductions [Member]us-gaap_ValuationAllowanceByDeferredTaxAssetAxisxbrldihttp://xbrl.org/2006/xbrldisre_DeferredTaxAssetValuationAllowanceFutureFederalStateAndLocalDeductionsMemberus-gaap_ValuationAllowanceByDeferredTaxAssetAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseDeferred Tax Asset Valuation Allowance, Future Federal State And Local Deductions [Member]288true0us-gaap_ValuationAllowanceLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseValuation Allowance [Line Items]289false0us-gaap_ValuationAllowanceAmountus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1500000015000000falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of the valuation allowance recorded as of the balance sheet date pertaining to the specified deferred tax asset for which an assessment was made that it is more likely than not that all or a portion of such deferred tax asset will not be realized through related deductions on future tax returns.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 -Subparagraph c falsefalseValuation Allowance, Amount293false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosureincometaxesdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse23falsefalseUSDtruefalse{us-gaap_OperatingLossCarryforwardsByTaxAuthorityAxis} : Foreign Country [Member] 12/31/2010 USD ($) $AS_OF_Dec31_2010_us-gaap_OperatingLossCarryforwardsByTaxAuthorityAxis_ForeignCountryMemberhttp://www.sec.gov/CIK0001032208instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseForeign Country [Member]us-gaap_OperatingLossCarryforwardsByTaxAuthorityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignCountryMemberus-gaap_OperatingLossCarryforwardsByTaxAuthorityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseForeign Country [Member]298true0us-gaap_OperatingLossCarryforwardsLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseOperating Loss Carryforwards [Line Items]299false0us-gaap_OperatingLossCarryforwardsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse4500000045000000falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe sum of domestic, foreign and state and local operating loss carryforwards, before tax effects, available to reduce future taxable income under enacted tax laws.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 48 -Subparagraph a falsefalseOperating Loss Carryforwards300false0sre_OperatingLossCarryforwardsNonexpiringsrefalsedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1500000015000000falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseOperating Loss Carryforwards, Nonexpiring301false0sre_OperatingLossCarryforwardsSetToExpiresrefalsedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse3000000030000000falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseOperating Loss Carryforwards, Set To Expire304false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosureincometaxesdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse24falsefalseUSDtruefalse{us-gaap_OperatingLossCarryforwardsByTaxAuthorityAxis} : Mexico [Member] 12/31/2010 USD ($) $AS_OF_Dec31_2010_us-gaap_OperatingLossCarryforwardsByTaxAuthorityAxis_MexicoMemberhttp://www.sec.gov/CIK0001032208instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseMexico [Member]us-gaap_OperatingLossCarryforwardsByTaxAuthorityAxisxbrldihttp://xbrl.org/2006/xbrldisre_MexicoMemberus-gaap_OperatingLossCarryforwardsByTaxAuthorityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseMexico [Member]309true0us-gaap_OperatingLossCarryforwardsLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseOperating Loss Carryforwards [Line Items]310false0us-gaap_OperatingLossCarryforwardsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse121000000121000000falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe sum of domestic, foreign and state and local operating loss carryforwards, before tax effects, available to reduce future taxable income under enacted tax laws.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 48 -Subparagraph a falsefalseOperating Loss Carryforwards311false0sre_OperatingLossCarryforwardsCumulativeAmountUtilizedsrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse119000000119000000falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseOperating Loss Carryforwards, Cumulative Amount Utilized314false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosureincometaxesdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse25falsefalseUSDtruefalse{us-gaap_OperatingLossCarryforwardsByTaxAuthorityAxis} : Federal, State And Local Jurisdiction [Member] 12/31/2010 USD ($) $AS_OF_Dec31_2010_us-gaap_OperatingLossCarryforwardsByTaxAuthorityAxis_FederalStateAndLocalJurisdictionMemberhttp://www.sec.gov/CIK0001032208instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseFederal, State And Local Jurisdiction [Member]us-gaap_OperatingLossCarryforwardsByTaxAuthorityAxisxbrldihttp://xbrl.org/2006/xbrldisre_FederalStateAndLocalJurisdictionMemberus-gaap_OperatingLossCarryforwardsByTaxAuthorityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseFederal, State And Local Jurisdiction [Member]319true0us-gaap_OperatingLossCarryforwardsLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseOperating Loss Carryforwards [Line Items]320false0us-gaap_OperatingLossCarryforwardsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse271000000271000000falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe sum of domestic, foreign and state and local operating loss carryforwards, before tax effects, available to reduce future taxable income under enacted tax laws.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 48 -Subparagraph a falsefalseOperating Loss Carryforwards323false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosureincometaxesdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse26falsefalseUSDtruefalse{us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis} : Expiration Of Statute Of Limitations [Member] 12/31/2010 USD ($) $AS_OF_Dec31_2010_us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis_ExpirationOfStatuteOfLimitationsMemberhttp://www.sec.gov/CIK0001032208instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseExpiration Of Statute Of Limitations [Member]us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxisxbrldihttp://xbrl.org/2006/xbrldisre_ExpirationOfStatuteOfLimitationsMemberus-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$27falsefalseUSDtruefalse{us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis} : Expiration Of Statute Of Limitations [Member] 12/31/2009 USD ($) $AS_OF_Dec31_2009_us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis_ExpirationOfStatuteOfLimitationsMemberhttp://www.sec.gov/CIK0001032208instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseExpiration Of Statute Of Limitations [Member]us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxisxbrldihttp://xbrl.org/2006/xbrldisre_ExpirationOfStatuteOfLimitationsMemberus-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$28falsefalseUSDtruefalse{us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis} : Expiration Of Statute Of Limitations [Member] 12/31/2008 USD ($) $AS_OF_Dec31_2008_us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis_ExpirationOfStatuteOfLimitationsMemberhttp://www.sec.gov/CIK0001032208instant2008-12-31T00:00:000001-01-01T00:00:00falsefalseExpiration Of Statute Of Limitations [Member]us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxisxbrldihttp://xbrl.org/2006/xbrldisre_ExpirationOfStatuteOfLimitationsMemberus-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseExpiration Of Statute Of Limitations [Member]330true0us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseSignificant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]331false0us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefitus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-6000000-6000000falsefalsefalsefalsefalse2truefalsefalse-7000000-7000000falsefalsefalsefalsefalse3truefalsefalse-6000000-6000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph d falsefalseSignificant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit332false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosureincometaxesdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse29falsefalseUSDtruefalse{us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis} : Potential Resolution Of Audit Issues [Member] 12/31/2010 USD ($) $AS_OF_Dec31_2010_us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis_PotentialResolutionOfAuditIssuesMemberhttp://www.sec.gov/CIK0001032208instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePotential Resolution Of Audit Issues [Member]us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxisxbrldihttp://xbrl.org/2006/xbrldisre_PotentialResolutionOfAuditIssuesMemberus-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$30falsefalseUSDtruefalse{us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis} : Potential Resolution Of Audit Issues [Member] 12/31/2009 USD ($) $AS_OF_Dec31_2009_us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis_PotentialResolutionOfAuditIssuesMemberhttp://www.sec.gov/CIK0001032208instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePotential Resolution Of Audit Issues [Member]us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxisxbrldihttp://xbrl.org/2006/xbrldisre_PotentialResolutionOfAuditIssuesMemberus-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$31falsefalseUSDtruefalse{us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis} : Potential Resolution Of Audit Issues [Member] 12/31/2008 USD ($) $AS_OF_Dec31_2008_us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis_PotentialResolutionOfAuditIssuesMemberhttp://www.sec.gov/CIK0001032208instant2008-12-31T00:00:000001-01-01T00:00:00falsefalsePotential Resolution Of Audit Issues [Member]us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxisxbrldihttp://xbrl.org/2006/xbrldisre_PotentialResolutionOfAuditIssuesMemberus-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalsePotential Resolution Of Audit Issues [Member]339true0us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseSignificant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]340false0us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefitus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse-35000000-35000000falsefalsefalsefalsefalse2truefalsefalse-24000000-24000000falsefalsefalsefalsefalse3truefalsefalse-17000000-17000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph d falsefalseSignificant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit341false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.sempra.com/role/disclosureincometaxesdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse32falsefalseUSDtruefalse{us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis} : Federal And State Timing Items Affecting Taxable Income [Member] 12/31/2008 USD ($) $AS_OF_Dec31_2008_us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis_FederalAndStateTimingItemsAffectingTaxableIncomeMemberhttp://www.sec.gov/CIK0001032208instant2008-12-31T00:00:000001-01-01T00:00:00falsefalseFederal And State Timing Items Affecting Taxable Income [Member]us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxisxbrldihttp://xbrl.org/2006/xbrldisre_FederalAndStateTimingItemsAffectingTaxableIncomeMemberus-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseFederal And State Timing Items Affecting Taxable Income [Member]348true0us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseSignificant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]349false0us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefitus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse-3000000-3000000falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph d falsefalseSignificant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit3255INCOME TAXES (Details) (USD $)NoRoundingUnKnownUnKnownUnKnownfalsetrue