Document and Entity Information. Document and Entity Information [Abstract] Statement [Table] Legal Entity [Axis] Entity [Domain] Entity [Domain] Entergy Arkansas. Entergy Arkansas [Member] Entergy Arkansas [Member] Entergy Arkansas Entergy Gulf States Louisiana. Entergy Gulf States Louisiana [Member] Entergy Gulf States Louisiana [Member] Entergy Gulf States Louisiana Entergy Louisiana. Entergy Louisiana [Member] Entergy Louisiana [Member] Entergy Louisiana [Member] Entergy Mississippi. Entergy Mississippi [Member] Entergy Mississippi [Member] Entergy Mississippi Entergy New Orleans. Entergy New Orleans [Member] Entergy New Orleans Entergy New Orleans [Member] Entergy Texas. Entergy Texas [Member] Entergy Texas [Member] Entergy Texas System Energy. System Energy [Member] System Energy [Member] System Energy Statement [Line Items] Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Document Fiscal Year Focus Document Fiscal Period Focus Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Common Stock, Shares Outstanding Consolidated Statements Of Income [Abstract] Electric and Gas Revenue [Abstract] OPERATING REVENUES Electric Revenue Electric Revenue, Total Electric Gas Domestic Regulated Revenue Natural gas Competitive Energy Revenue Competitive businesses Electric and Gas Revenue TOTAL Operating Revenues Operating Expenses [Abstract] OPERATING EXPENSES Operating Costs and Expenses [Abstract] Operating and Maintenance: Operation and Maintenance: Utilities Operating Expense, Fuel Used Fuel, fuel-related expenses, and gas purchased for resale Cost of Purchased Power Purchased power Amortization of costs deferred during nuclear refueling outages over the estimated period to the next outage because these refueling outage expenses are incurred to prepare the units to operate for the next operating cycle without having to be taken off line. Nuclear Refueling Outage Expenses Nuclear refueling outage expenses Impairment of Long-Lived Assets Held-for-use Asset impairment Utilities Operating Expense, Maintenance and Operations Operation and maintenance expense Other operation and maintenance Asset Retirement Obligation, Accretion Expense Accretion Decommissioning Taxes, Miscellaneous Taxes, Miscellaneous, Total Taxes other than income taxes Depreciation, Nonproduction Depreciation and amortization Represents the debit or credit to defer certain costs or revenues because they will be recovered or returned to customers in the future. Other Regulatory Charges Credits Net Other regulatory credits - net Other regulatory charges (credits) - net Operating Expenses TOTAL Operating Income (Loss) Operating Income (Loss) OPERATING INCOME Operating Income Nonoperating Income (Expense) [Abstract] OTHER INCOME Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity Allowance for equity funds used during construction Investment Income, Interest and Dividend Investment Income, Interest and Dividend, Total Interest and investment income Other Nonoperating Income (Expense) Other Nonoperating Income (Expense), Total Miscellaneous - net Nonoperating Income (Expense) TOTAL Interest Expense [Abstract] INTEREST AND OTHER CHARGES INTEREST EXPENSE Interest Expense, Debt Interest Expense, Debt, Total Interest expense Public Utilities, Allowance for Funds Used During Construction, Capitalized Interest Allowance for borrowed funds used during construction Interest Expense TOTAL Interest expense Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Cumulative Effects of Changes in Accounting Principles, Noncontrolling Interest Income before income taxes INCOME BEFORE INCOME TAXES Income Tax Expense (Benefit) Income taxes (benefits) Income tax expense from continuing operations Income taxes Consolidated net income Net income CONSOLIDATED NET INCOME Consolidated net income Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders Preferred dividend requirements of subsidiaries Preferred dividend requirements and other Net Income Attributable to Entergy Corporation Earnings applicable to common equity Net income (loss) attributable to Entergy Corporation, Income EARNINGS APPLICABLE TO COMMON STOCK EARNINGS APPLICABLE TO COMMON STOCK Earnings Per Share [Abstract] Basic and diluted earnings per share Earnings per average common share: Earnings Per Share, Basic Net Income Attributable to Entergy Corporation, $/share Earnings Per Share, Basic, Total Basic Earnings Per Share, Diluted Diluted earnings per share $/share Diluted earnings per share $/share Diluted Common Stock, Dividends, Per Share, Declared Common stock dividend Dividends declared per common share Weighted Average Number of Shares Outstanding, Basic Net Income Attributable to Entergy Corporation, Shares Weighted Average Number of Shares Outstanding, Basic, Total Basic average number of common shares outstanding Weighted Average Number of Shares Outstanding, Diluted Diluted earnings per share, Shares Diluted earnings per share, Shares Diluted average number of common shares outstanding Consolidated Statements Of Cash Flows [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] OPERATING ACTIVITIES Consolidated Net Income Adjustments To Reconcile Consolidated Net Income To Net Cash Flow. Consolidated Net Income Adjustments To Reconcile Consolidated Net Income To Net Cash Flow [Abstract] Adjustments to reconcile net income to net cash flow provided by operating activities: Adjustments to reconcile consolidated net income to net cash flow provided by operating activities: Depreciation, Amortization and Accretion, Net Depreciation and amortization Depreciation, Amortization and Accretion, Net, Total Depreciation, amortization, and decommissioning, including nuclear fuel amortization Deferred Income Taxes and Tax Credits Taxes accrued Deferred Income Taxes and Tax Credits, Total Deferred income taxes, investment tax credits, and non-current taxes accrued Changes In Working Capital. Changes In Working Capital [Abstract] Changes in working capital: Increase (Decrease) in Receivables Receivables Increase (Decrease) in Receivables, Total Increase (Decrease) in Fuel Inventories Fuel inventory Increase (Decrease) in Fuel Inventories, Total Increase (Decrease) in Accounts Payable Increase (Decrease) in Accounts Payable, Total Accounts payable Increase (Decrease) in Accrued Income Taxes Payable Taxes accrued Prepaid taxes and taxes accrued Increase (Decrease) in Interest Payable, Net Interest accrued Increase (Decrease) in Deferred Fuel Costs Deferred fuel Deferred fuel costs Increase (Decrease) in Deferred Fuel Costs, Total Increase (Decrease) in Other Operating Assets and Liabilities, Net Other working capital accounts Increase (Decrease) in Other Operating Assets and Liabilities, Net, Total Provision for Other Losses Provisions for estimated losses Changes in provisions for estimated losses Increase (Decrease) in Regulatory Assets and Liabilities Changes in other regulatory assets Other regulatory liabilities. Other regulatory liabilities Increase (Decrease) in Pension and Postretirement Obligations Pensions and other postretirement liabilities Increase (Decrease) in Pension and Postretirement Obligations, Total Changes in pension and other postretirement liabilities Other Noncash Expense Other operating activities Other Net Cash Provided by (Used in) Operating Activities Net cash flow provided by (used in) operating activities Net cash flow provided by operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] INVESTING ACTIVITIES Payments for Capital Improvements Construction/capital expenditures Allowance for Funds Used During Construction, Investing Activities Allowance for equity funds used during construction The net cash outflow from any material that is commonly used in the generation of nuclear energy. Nuclear fuel purchases Nuclear fuel purchases Nuclear fuel purchases Payments to Acquire Other Property, Plant, and Equipment Payment for purchase of plant Payment for purchase of plant The net cash inflow from any material that is commonly used in the generation of nuclear energy. Proceeds From Sale Leaseback Of Nuclear Fuel Proceeds from sale of nuclear fuel Proceeds from sale of nuclear fuel Proceeds from Sale of Productive Assets Proceeds from sale of equipment Proceeds from Sale of Productive Assets, Total Proceeds from sale of assets and businesses Changes in the account in which recoveries from customers through a transition charge are deposited and from which payments are made to service the securitization bonds issued by Entergy Gulf States Reconstruction Funding. Changes In Transition Charge Account Change in money pool receivable - net Changes in securitization account Remittances to transition charge account Remittances to transition charge account Payments from transition charge account Payments from transition charge account Payments made under amended value sharing agreements with NYPA. NYPA Value Sharing Payment NYPA value sharing payment Payments To Acquire Restricted Investments Payment to storm reserve escrow account Payments to Acquire Restricted Investments, Total Proceeds From Sale Of Restricted Investments Receipts from storm reserve escrow account Payments for (Proceeds from) Other Investing Activities Decrease (increase) in other investments Changes in other investments - net Decrease (increase) in other investments Litigation proceeds for reimbursement of spent nuclear fuel storage costs. Litigation proceeds for reimbursement of spent nuclear fuel storage costs Proceeds from Decommissioning Fund Proceeds from nuclear decommissioning trust fund sales Payments to Invest in Decommissioning Fund Investment in nuclear decommissioning trust funds Change in money pool receivable - net. Change in money pool receivable - net Proceeds from Sale and Maturity of Other Investments Proceeds from sale of investment Proceeds from Sale and Maturity of Other Investments, Total Proceeds from Divestiture of Businesses and Interests in Affiliates Proceeds from Divestiture of Businesses and Interests in Affiliates, Total Investment in affiliates The net cash outflow (inflow) from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy. Payment For Proceed From Other Investing Activities Other Other Net Cash Provided by (Used in) Investing Activities Net cash flow used in investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] FINANCING ACTIVITIES Proceeds From Issuance Of. Proceeds From Issuance Of [Abstract] Proceeds from the issuance of: Proceeds from Issuance of Long-term Debt Proceeds from the issuance of long-term debt Proceeds from Issuance of Long-term Debt, Total Long-term debt Proceeds from Issuance of Preferred Stock and Preference Stock Preferred stock Proceeds from Issuance or Sale of Equity Proceeds from Issuance or Sale of Equity, Total Common stock and treasury stock Repayments of Long-term Debt Retirement of long-term debt Repayments of Long-term Debt, Total Payments for Repurchase of Common Stock Repurchase of common stock Change in money pool payable - net. Change In Money Pool Payable Net Change in money pool payable - net Changes in money pool payable Changes in credit line borrowings net. Changes in credit line borrowings net Changes in credit borrowings - net Dividends Paid. Dividends Paid [Abstract] Dividends/distributions paid: Dividends paid: Payments of Dividends, Common Stock Common stock Payments of Dividends, Preferred Stock and Preference Stock Preferred stock Proceeds from (Payments for) Other Financing Activities Other Net Cash Provided by (Used in) Financing Activities Net cash flow used in financing activities Effect of Exchange Rate on Cash and Cash Equivalents Effect of Exchange Rate on Cash and Cash Equivalents, Total Effect of exchange rates on cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Net decrease in cash and cash equivalents Net increase (decrease) in cash and cash equivalents Net increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of period Cash and cash equivalents at beginning of period Total cash and cash equivalents Supplemental Cash Flow Information [Abstract] SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION: Cash Paid Received During Period For. Cash Paid Received During Period For [Abstract] Cash paid / (received) during the period for: Cash paid during the period for: Interest Paid, Capitalized Interest - net of amount capitalized Income Taxes Paid, Net Income Taxes Paid, Net, Total Income taxes Consolidated Balance Sheets [Abstract] Assets, Current [Abstract] CURRENT ASSETS Cash and Cash Equivalents [Abstract] Cash and cash equivalents Cash and cash equivalents: Cash Cash, Ending Balance Cash, Beginning Balance Cash Cash Equivalents, at Carrying Value Cash Equivalents, at Carrying Value, Total Temporary cash investments Restricted Cash and Cash Equivalents, Current Securitization recovery trust account Accounts Receivable. Accounts Receivable [Abstract] Accounts receivable: Accounts Receivable, Gross, Current Customer Allowance for Doubtful Accounts Receivable, Current Allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Current, Ending Balance Allowance for Doubtful Accounts Receivable, Current, Beginning Balance Allowance for doubtful accounts Accounts Receivable, Related Parties, Current Associated companies Associated companies Other Receivables Other Unbilled amounts due for services rendered or products shipped. This element is distinct from unbilled contracts receivables because this is based on noncontract transactions. Accrued Unbilled Revenues Accrued unbilled revenues Accounts Receivable, Net, Current Accounts receivable/ payable-associated companies Total accounts receivable Deferred Fuel Cost Deferred fuel costs Deferred fuel costs Deferred Tax Assets, Net, Current Deferred Tax Assets, Net, Current, Ending Balance Deferred Tax Assets, Net, Current, Beginning Balance Deferred Tax Assets, Net, Current, Total Accumulated deferred income taxes Fossil fuel inventory held for consumption in the production of energy. Fuel Inventory At Average Cost Fuel inventory Fuel inventory - at average cost Other Inventory, Supplies Materials and supplies - at average cost Costs deferred during a nuclear refueling outage and amortized over the estimated period to the next outage because these refueling outage expenses are incurred to prepare the units to operate for the next operating cycle without having to be taken off line. Deferred Nuclear Refueling Outage Costs Deferred nuclear refueling outage costs Hedging Assets, Current Hedging Assets, Current, Total Gas hedge contracts Carrying amount as of the balance sheet date of the System Agreement cost equalization payments that are expected to be recovered through Entergy Arkansas' production cost allocation rider within one year. System Agreement Cost Equalization Assets System agreement cost equalization Prepaid Taxes Prepaid taxes Other Assets, Current Prepayments and other Assets, Current TOTAL Assets, Noncurrent [Abstract] OTHER PROPERTY AND INVESTMENTS Equity Method Investments End of year Beginning of year Investment in affiliate preferred membership interests Investment in affiliates - at equity Decommissioning Fund Investments Decommissioning trust funds Property, Plant and Equipment, Net Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net, Beginning Balance Non-utility property at cost (less accumulated depreciation) Property, Plant and Equipment, Net, Total Non-utility property - at cost (less accumulated depreciation) Escrow accounts. Escrow accounts Other Long-term Investments Other Long-term Investments TOTAL Public Utilities, Property, Plant and Equipment, Net [Abstract] UTILITY PLANT PROPERTY, PLANT AND EQUIPMENT Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment Electric Capital Leased Assets, Gross Capital Leased Assets, Gross, Total Property under capital lease Period end amount of property, plant and equipment (PPE) related to transmission and distribution of natural gas for resale owned by public utility. Natural gas Natural gas Public Utilities, Property, Plant and Equipment, Construction Work in Progress Construction work in progress Construction work in progress Nuclear Fuel, Net of Amortization Nuclear fuel Public Utilities, Property, Plant and Equipment, Plant in Service TOTAL UTILITY PLANT TOTAL PROPERTY, PLANT AND EQUIPMENT TOTAL PROPERTY, PLANT AND EQUIPMENT Public Utilities, Property, Plant and Equipment, Accumulated Depreciation Less - accumulated depreciation and amortization Public utilities, property, plant and equipment, net PROPERTY, PLANT AND EQUIPMENT - NET UTILITY PLANT - NET Deferred Debits And Other Assets Abstract. Deferred Debits And Other Assets [Abstract] DEFERRED DEBITS AND OTHER ASSETS Regulatory Asset. Regulatory Asset [Abstract] Regulatory assets: SFAS Regulatory Asset Net SFAS Regulatory Asset Net Regulatory asset for income taxes - net Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are not expected to be recovered through revenue sources within one year or the normal operating cycle if longer and are not specifically broken out elsewhere in the balance sheet. Other Regulatory Assets Other regulatory assets Other regulatory assets Carrying amount as of the balance sheet date of capitalized fuel costs of a regulated entity that are not expected to be recovered from customers within one year. Deferred fuel costs Deferred fuel costs Goodwill Goodwill, Ending Balance Goodwill, Beginning Balance Goodwill, Total Goodwill Deferred Tax Assets, Net, Noncurrent Deferred Tax Assets, Net, Noncurrent, Total Accumulated deferred income taxes Due from Related Parties, Noncurrent Due from Related Parties, Noncurrent, Total Long-term receivables - associated companies Other Assets, Noncurrent Other Assets, Noncurrent, Total Other Assets, Noncurrent TOTAL Assets TOTAL ASSETS Total assets Liabilities, Current [Abstract] CURRENT LIABILITIES Long-term Debt, Current Maturities Less Amount Due Within One Year Long-term Debt, Current Maturities, Total Currently maturing long-term debt Short-term Borrowings Short-term borrowings Short-term Debt, Total Borrowings Short-term Bank Loans and Notes Payable Associated companies Notes payable Accounts Payable, Related Parties, Current Associated companies accounts payable Accounts Payable, Current Accounts Payable, Current, Total Accounts payable Accounts Payable, Other, Current Other Customer Deposits, Current Customer deposits Taxes Payable, Current Taxes Payable, Current, Total Taxes accrued Deferred Tax Liabilities, Current Accumulated deferred income taxes - current Accumulated deferred income taxes Interest Payable, Current Taxes accrued Interest accrued Carrying amount as of the balance sheet date of capitalized fuel costs of a regulated entity that are expected to be returned to customers through rate adjustments within one year. Deferred Fuel Costs Current Liabilities Deferred fuel costs Deferred fuel costs Capital Lease Obligations, Current Obligations under capital leases Pension and Other Postretirement Defined Benefit Plans, Current Liabilities Current liabilities Pension and other postretirement liabilities Regulatory Liability, Current Regulatory Liability, Current, Total System agreement cost equalization Hedging Liabilities, Current Gas hedge contracts Other Liabilities, Current Other Liabilities, Current, Total Other Liabilities, Current TOTAL Liabilities, Noncurrent [Abstract] NON-CURRENT LIABILITIES Deferred Tax Liabilities, Noncurrent Accumulated deferred income taxes and taxes accrued Accumulated Deferred Investment Tax Credit Accumulated deferred investment tax credits