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Element etr_ActuariallyDeterminedAccumulatedPostretirementBenefitObligationEarnedByRetireesAndActiveEmployees had a mix of decimals attribute values: -6 -5. Element etr_AuthorizationOfRepurchaseOfCommonStock had a mix of decimals attribute values: -8 -6. Element etr_AuthorizedReturnOnCommonEquityMinimum had a mix of decimals attribute values: 3 4 5. Element etr_EarnedReturnOnCommonEquity had a mix of decimals attribute values: 3 4. Element etr_MinimumAmountOfBenefitsCommittedToPassOnToCustomers had a mix of decimals attribute values: -5 -4. Element etr_OtherRegulatoryAssets had a mix of decimals attribute values: -5 -3. Element etr_ProspectiveAnnualRateReductionsForFiveYears had a mix of decimals attribute values: -5 -4. Element etr_WeightedAverageInterestRateOnBorrowings had a mix of decimals attribute values: 4 5. Element us-gaap_AvailableForSaleSecurities had a mix of decimals attribute values: -6 -5. Element us-gaap_DeferredIncomeTaxExpenseBenefit had a mix of decimals attribute values: -6 -3. Element us-gaap_DeferredTaxAssetsCapitalLossCarryforwards had a mix of decimals attribute values: -6 -3. Element us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation had a mix of decimals attribute values: -8 -5. Element us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax had a mix of decimals attribute values: -5 -3. Element us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear had a mix of decimals attribute values: 3 4. Element us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare had a mix of decimals attribute values: 0 4. Element us-gaap_LineOfCreditFacilityAmountOutstanding had a mix of decimals attribute values: -6 -5. Element us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths had a mix of decimals attribute values: -5 -3. Element us-gaap_LossContingencyRangeOfPossibleLossMaximum had a mix of decimals attribute values: -8 -5 -4. Element us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnNetIncome had a mix of decimals attribute values: -8 -6. Element us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress had a mix of decimals attribute values: -6 -3. Element us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet had a mix of decimals attribute values: -6 -3. Element us-gaap_StockIssuedDuringPeriodSharesNewIssues had a mix of decimals attribute values: -6 0. 'Monetary' elements on report '0601 - Disclosure - Equity (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '0601 - Disclosure - Summary of Significant Accounting Policies (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '06012 - Disclosure - Summary of Significant Accounting Policies (Details 2)' had a mix of different decimal attribute values. 'Monetary' elements on report '06027 - Disclosure - Rate and Regulatory Matters (Details Textual)' had a mix of different decimal attribute values. 'Monetary' elements on report '06033 - Disclosure - Income Taxes (Details 3)' had a mix of different decimal attribute values. 'Monetary' elements on report '06036 - Disclosure - Income Taxes (Details Textual)' had a mix of different decimal attribute values. 'Monetary' elements on report '06043 - Disclosure - Revolving Credit Facilities, Lines of Credit and Short-Term Borrowings (Details Textual)' had a mix of different decimal attribute values. 'Monetary' elements on report '06053 - Disclosure - Long - Term Debt (Details Textual)' had a mix of different decimal attribute values. 'Monetary' elements on report '06081 - Disclosure - Commitments and Contingencies (Entergy Corporation, Entergy Arkansas, Entergy Gulf States Louisiana, Entergy Louisiana, Entergy Mississippi, Entergy New Orleans, Entergy Texas, and System Energy) (Details Textual)' had a mix of different decimal attribute values. 'Monetary' elements on report '06091 - Disclosure - Asset Retirement Obligations (Details 1)' had a mix of different decimal attribute values. 'Monetary' elements on report '06119 - Disclosure - Retirement, Other Postretirement Benefits, and Defined Contribution Plans (Details Textual)' had a mix of different decimal attribute values. 'Monetary' elements on report '0613 - Disclosure - Business Segment Information (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '0614 - Disclosure - Equity Method Investments (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '0615 - Disclosure - Acquisitions and Dispositions (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '06172 - Disclosure - Decommissioning Trust Funds (Details Textual)' had a mix of different decimal attribute values. Process Flow-Through: 0110 - Statement - Consolidated Income Statements Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2011' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2011' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2011' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2011' Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2010' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2010' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2010' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2010' Process Flow-Through: 0120 - Statement - Consolidated Statements of Cash Flows Process Flow-Through: 0130 - Statement - Consolidated Balance Sheets Process Flow-Through: Removing column 'Dec. 31, 2009' Process Flow-Through: Removing column 'Dec. 31, 2008' Process Flow-Through: 0131 - Statement - Consolidated Balance Sheets (Parenthetical) Process Flow-Through: 0141 - Statement - Consolidated Statements of Changes in Equity (Parenthetical) Process Flow-Through: 0150 - Statement - Consolidated Statements of Comprehensive Income Process Flow-Through: 0151 - Statement - Comprehensive Income (Parenthetical) Process Flow-Through: 0160 - Statement - Consolidated Income Statements (ENTERGY ARKANSAS, INC.) Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2011' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2011' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2011' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2011' Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2010' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2010' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2010' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2010' Process Flow-Through: 0161 - Statement - Consolidated Statements of Cash Flows (ENTERGY ARKANSAS, INC.) Process Flow-Through: 0162 - Statement - Consolidated Balance Sheets (ENTERGY ARKANSAS, INC.) Process Flow-Through: Removing column 'Dec. 31, 2009' Process Flow-Through: Removing column 'Dec. 31, 2008' Process Flow-Through: 01621 - Statement - Consolidated Balance Sheets (ENTERGY ARKANSAS, INC.) (Parenthetical) Process Flow-Through: 0164 - Statement - Income Statements (ENTERGY GULF STATES LOUISIANA, L.L.C.) Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2011' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2011' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2011' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2011' Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2010' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2010' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2010' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2010' Process Flow-Through: 0165 - Statement - Statements of Cash Flows (ENTERGY GULF STATES LOUISIANA, L.L.C.) Process Flow-Through: 0166 - Statement - Balance Sheets (ENTERGY GULF STATES LOUISIANA, L.L.C.) Process Flow-Through: Removing column 'Dec. 31, 2009' Process Flow-Through: Removing column 'Dec. 31, 2008' Process Flow-Through: 0168 - Statement - Comprehensive Income (ENTERGY GULF STATES LOUISIANA, L.L.C) Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2011' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2011' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2011' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2011' Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2010' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2010' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2010' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2010' Process Flow-Through: 01681 - Statement - Comprehensive Income (ENTERGY GULF STATES LOUISIANA, L.L.C) (Parenthetical) Process Flow-Through: 0169 - Statement - Income Statements (ENTERGY LOUISIANA, LLC) Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2011' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2011' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2011' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2011' Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2010' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2010' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2010' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2010' Process Flow-Through: 0170 - Statement - Statements of Cash Flows (ENTERGY LOUISIANA, LLC) Process Flow-Through: 0171 - Statement - Consolidated Balance Sheets (ENTERGY LOUISIANA, LLC) Process Flow-Through: Removing column 'Dec. 31, 2009' Process Flow-Through: Removing column 'Dec. 31, 2008' Process Flow-Through: 01711 - Statement - Consolidated Balance Sheets (ENTERGY LOUISIANA, LLC) (Parenthetical) Process Flow-Through: 0173 - Statement - Comprehensive Income (ENTERGY LOUISIANA, LLC) Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2011' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2011' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2011' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2011' Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2010' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2010' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2010' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2010' Process Flow-Through: 01731 - Statement - Comprehensive Income (ENTERGY LOUISIANA, LLC) (Parenthetical) Process Flow-Through: 0174 - Statement - Income Statements (ENTERGY MISSISSIPPI, INC.) Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2011' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2011' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2011' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2011' Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2010' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2010' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2010' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2010' Process Flow-Through: 0175 - Statement - Statements of Cash Flows (ENTERGY MISSISSIPPI, INC) Process Flow-Through: 0176 - Statement - Balance Sheets (ENTERGY MISSISSIPPI, INC.) Process Flow-Through: Removing column 'Dec. 31, 2009' Process Flow-Through: Removing column 'Dec. 31, 2008' Process Flow-Through: 01761 - Statement - Balance Sheets (ENTERGY MISSISSIPPI, INC.) (Parenthetical) Process Flow-Through: 0178 - Statement - Income Statements (ENTERGY NEW ORLEANS, INC.) Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2011' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2011' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2011' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2011' Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2010' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2010' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2010' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2010' Process Flow-Through: 0179 - Statement - Statements of Cash Flows (ENTERGY NEW ORLEANS, INC.) Process Flow-Through: 0180 - Statement - Balance Sheets (ENTERGY NEW ORLEANS, INC.) Process Flow-Through: Removing column 'Dec. 31, 2009' Process Flow-Through: Removing column 'Dec. 31, 2008' Process Flow-Through: 01801 - Statement - Balance Sheets (ENTERGY NEW ORLEANS, INC.) (Parenthetical) Process Flow-Through: 0182 - Statement - Consolidated Income Statements (ENTERGY TEXAS, INC. AND SUBSIDIARIES) Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2011' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2011' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2011' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2011' Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2010' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2010' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2010' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2010' Process Flow-Through: 0183 - Statement - Consolidated Statements of Cash Flows (ENTERGY TEXAS, INC. AND SUBSIDIARIES) Process Flow-Through: 0184 - Statement - Consolidated Balance Sheets (ENTERGY TEXAS, INC. AND SUBSIDIARIES) Process Flow-Through: Removing column 'Dec. 31, 2009' Process Flow-Through: Removing column 'Dec. 31, 2008' Process Flow-Through: 01841 - Statement - Consolidated Balance Sheets (ENTERGY TEXAS, INC. AND SUBSIDIARIES) (Parenthetical) Process Flow-Through: 0186 - Statement - Income Statements (SYSTEM ENERGY RESOURCES, INC.) Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2011' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2011' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2011' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2011' Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2010' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2010' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2010' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2010' Process Flow-Through: 0187 - Statement - Statements of Cash Flows (SYSTEM ENERGY RESOURCES, INC.) Process Flow-Through: 0188 - Statement - Balance Sheets (SYSTEM ENERGY RESOURCES, INC.) Process Flow-Through: Removing column 'Dec. 31, 2009' Process Flow-Through: Removing column 'Dec. 31, 2008' Process Flow-Through: 01881 - Statement - Balance Sheets (SYSTEM ENERGY RESOURCES, INC.) (Parenthetical) etr-20111231.xml etr-20111231.xsd etr-20111231_cal.xml etr-20111231_def.xml etr-20111231_lab.xml etr-20111231_pre.xml true true