No authoritative reference available. No authoritative reference available. Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability unrealized gain loss. No authoritative reference available. Counterparties funds related to asset positions. No authoritative reference available. Notice letter, required. No authoritative reference available. Defined Benefit Plan Actual Return On Plan Assets Realized Gains Losses. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Long-term pollution conrol bond bearing fixed interest rate. No authoritative reference available. No authoritative reference available. No authoritative reference available. Property taxes. No authoritative reference available. Cap-and-trade program to reduce mercury emissions after nine years. No authoritative reference available. Deferred Tax Assets Liabilities Net Non current Non utility generation costs. No authoritative reference available. Proceeds from sale of investments in available-for-sale securities, realized gains and losses on those sales, and interest and dividend income. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. General Taxes. No authoritative reference available. No authoritative reference available. No authoritative reference available. FirstEnergy Solutions Corp Condensed Consolidating Statements Of Cash Flows. No authoritative reference available. No authoritative reference available. No authoritative reference available. Long Term Debt Due Within One Year No authoritative reference available. No authoritative reference available. No authoritative reference available. Surety bonds and related guarantees. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Aggregate indemnity for replacement power costs. No authoritative reference available. Cap-and-trade program to reduce mercury emissions after one year. No authoritative reference available. Assumptions Used to Determine Net Periodic Benefit Cost. No authoritative reference available. Investments excludes Receivables, Payables and Accrued income. No authoritative reference available. Variable Interest Entities Net Exposure. No authoritative reference available. No authoritative reference available. No authoritative reference available. Accessable amount of financing at cost based on commercial paper rates and annual fees. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Share Based Compensation Arrangement By Share Based Payment Award Restricted Stock Units. No authoritative reference available. Deferred accumulated cost, total. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Bondable Stranded Costs Outstanding Of Previously Divested Oyster Creek Nuclear Generating Station. No authoritative reference available. Pertcentage of undivided interest of non guarantor subsidiary. No authoritative reference available. Discounted Lease Payments, net. No authoritative reference available. Approximate fair value and related carrying amounts of notes receivable. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Reconciliation of federal income tax expense at the federal statutory rate to the total provision for income taxes. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Tranches offered in second descending clock auction, Delivery Period Description. No authoritative reference available. Portion Of Insurance Coverage Of Private Insurer Included In Single Nuclear Incident Liability. No authoritative reference available. Variable interest entities Percentage of equity interest by unaffiliated third party included in Ownership of entity three. No authoritative reference available. Pre-tax net operating loss carryforwards expected to utilized. No authoritative reference available. No authoritative reference available. No authoritative reference available. Annual Revenue Requirements In ATSI Zone related to Michigan Thumb Project. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Supplemental Guarantor Information Disclosure Text Block. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. long-term debt and other long-term obligations. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Decrease net income due to increase in interest rates associated with variable-rate debt. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Interest receivable removed from the accrued interest for uncertain tax positions. No authoritative reference available. Retrospective assessments liability. No authoritative reference available. Favourable affect on effective tax rate. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset unrealized gain loss. No authoritative reference available. Tranches won in first descending clock auction, Description. No authoritative reference available. No authoritative reference available. No authoritative reference available. Acquisition of supply requirements No authoritative reference available. No authoritative reference available. No authoritative reference available. Decrease net income due to adverse change in commodity prices. No authoritative reference available. Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Sales. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Number of restricted stock units award. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair value and related carrying amounts of long-term debt and other long-term obligations. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Deferred Tax Assets Liabilities Net Noncurrent Other regulatory assets Rcp. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Book income before provision for income taxes. No authoritative reference available. Adjustment That Increased Income Tax Expense. No authoritative reference available. Recognized tax benefits. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Issuances. No authoritative reference available. No authoritative reference available. No authoritative reference available. Investment tax credit amortization. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair value net assets liabilities measured on recurring basis. No authoritative reference available. Unamortized losses associated with prior interest rate hedges net of tax. No authoritative reference available. Utilities Required to Reduce Peak Demand From 2010 To 2018 in percentage No authoritative reference available. Fair value measurement with unobservable inputs reconciliation recurring basis asset and liability transfers net total. No authoritative reference available. No authoritative reference available. No authoritative reference available. Defined benefit plan, effect of one percentage point change in assumed health care cost trend rates. No authoritative reference available. Number Of Customers. No authoritative reference available. No authoritative reference available. No authoritative reference available. Long-term pollution control bond bearing varible interest rate. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Line Of Credit Facility Annual Fees Payable. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Defined benefit plan net periodic benefit cost. No authoritative reference available. Hight of demolited stack at FGCO's Mad River Plant. No authoritative reference available. No authoritative reference available. No authoritative reference available. Deferred Tax Assets Liabilities Net Noncurrent Oyster Creek securitization. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Share Based Compensation Arrangement By Share Based Payment Award Restricted Stock Award. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair value measurement with unobservable inputs reconciliation recurring basis asset and liability sales total. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Net interest expense (income) and cumulative net interest payable (receivable). No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Minimum Equity To Total Capitalization Ratio To Be Maintained For Payment Of Capital Dividend. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Summary of quarterly financial data. No authoritative reference available. Cost included as repair deduction due to change in accounting method. No authoritative reference available. Net exposure to loss based upon casualty value provisions. No authoritative reference available. Deferred Tax Assets Liabilities Net Non current Property basis differences. No authoritative reference available. No authoritative reference available. No authoritative reference available. Comprehensive Income. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair Value Assets Measured On Recurring Basis. No authoritative reference available. Renewed period of receivables programs. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Maximum aggregate assessment for incident. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Number of generating units destroyed as demolished stack fell in wrong direction. No authoritative reference available. Additional premium received for stock option in percentage. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Realized gain loss. No authoritative reference available. No authoritative reference available. No authoritative reference available. Deferred Tax Assets Liabilities Net Non current All other. No authoritative reference available. Reconciliation of Changes in the Fair Value of Level 3 Other Postretirement Benefit Investments. No authoritative reference available. Irrevocable line of credit facility. No authoritative reference available. No authoritative reference available. No authoritative reference available. Municipal Bond Insurance Current Borrowing Capacity. No authoritative reference available. No authoritative reference available. No authoritative reference available. Decrease due to net hedge losses reclassified to earnings. No authoritative reference available. Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases. No authoritative reference available. No authoritative reference available. No authoritative reference available. Deferred Tax Assets Liabilities Net Non current Deferred sale and leaseback gain. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Defined benefit plan expected future benefit payments in year five and thereafter. No authoritative reference available. Interest income. No authoritative reference available. Prior period adjustments in net income. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Revised decommisioning costs. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Reclassifications from long-term debt into interest expense. No authoritative reference available. No authoritative reference available. No authoritative reference available. Effect of derivative instruments on statements of income and comprehensive income for instruments designated in cash flow hedging relationships text block. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Long-term pollution control bond fixed interest rate. No authoritative reference available. No authoritative reference available. No authoritative reference available. Former ownership of Subsidiary in Work Unit. No authoritative reference available. Capping of gas two emissions under clean air transport rule. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Number of long term power purchase agreements maintained by parent company with Non utility generation entities. No authoritative reference available. No authoritative reference available. No authoritative reference available. Pension investments measured at fair value. No authoritative reference available. No authoritative reference available. No authoritative reference available. Interest expense to affiliates non parent company. No authoritative reference available. No authoritative reference available. No authoritative reference available. Capital leases and operating leases rent expense. No authoritative reference available. No authoritative reference available. No authoritative reference available. Pollution Control Revenue Bonds By Maturity. No authoritative reference available. Tax benefits favorably affecting effective tax rate. No authoritative reference available. Capping of NOx emissions. No authoritative reference available. Deferred Tax Assets Liabilities Net Non current Loss carry forwards. No authoritative reference available. Investment In Consolidated Subsidiary. No authoritative reference available. Burger plant units announced to cancel repower. No authoritative reference available. Change resulted from Increase related to current hedging activity, Net of tax. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Capping of SO2 emissions under Clean Air Transport Rules. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The net change in uncertain tax positions that affected the Company's effective tax rate. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Annual composite depreciation rate. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Load Served From Renewable Energy Resources. No authoritative reference available. Fair Value Liabilities Measured On Recurring Basis. No authoritative reference available. No authoritative reference available. No authoritative reference available. Tranches offered in first descending clock auction, Description. No authoritative reference available. Long-term power purchase agreements. No authoritative reference available. Power purchase contract liability. No authoritative reference available. Plant Capacity. No authoritative reference available. Fair values of the decommissioning trust assets. No authoritative reference available. No authoritative reference available. No authoritative reference available. Increase electric distribution rates. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair value measurement with unobservable inputs reconciliation recurring basis asset and liability issuances total. No authoritative reference available. Variable interest entities amount agreed to be paid by entity one to entity two for purchase of additional economic interest. No authoritative reference available. Short-term debt weighted average interest rate. No authoritative reference available. Capital Leases Income Statement Other Expense. No authoritative reference available. Deferred Tax Assets Liabilities Net Noncurrent Deferred MISO PJM transmission costs. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Other comprehensive income (loss) reclassified to net income. No authoritative reference available. No authoritative reference available. No authoritative reference available. Tranches offered in second descending clock auction, Description. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Aggregate Annual Servicing Fees Receivable For Servicing Of Transition Bonds. No authoritative reference available. Master SSO supply agreements effective period description No authoritative reference available. Expected increase in interest rate assosiated with variable rate debt. No authoritative reference available. Reduction in effective tax rate. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Funds provided by 2020. No authoritative reference available. Funds provided over the next three years. No authoritative reference available. operating lease obligation current. No authoritative reference available. Accumulated Provision For Uncollectible Accounts Other. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Outstanding guarantees related to energy and energy related contracts. No authoritative reference available. No authoritative reference available. No authoritative reference available. Issuance of notes in connection with joint venture acqusition. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair value measurement with unobservable inputs reconciliation recurring basis asset and liability settlements total. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Volume Of Parent Company's Outstanding Derivative Transactions. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Tranches won in second descending clock auction Description. No authoritative reference available. Increase Decrease In Fair Value Used In Annual Goodwill Impairment Test. No authoritative reference available. Unamortized Gains Losses Included In Aocl Associated With Commodity Derivatives. No authoritative reference available. Parental guarantee associated with funding of decommissioning costs. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. FirstEnergy Solutions Corp Condensed Consolidating Balance Sheets Text Block. No authoritative reference available. Preference stock shares authorized. No authoritative reference available. Additional FES collateral payments. No authoritative reference available. Number of tranches offered in descending clock auction. No authoritative reference available. Number of tranches won in descending clock auction. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Investments not required to be disclosed. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Regulatory asset impairment related to Electric Security Plan. No authoritative reference available. No authoritative reference available. No authoritative reference available. Adjusted goodwill. No authoritative reference available. The gains and losses from increase (decrease) in fair value of dervatives included in earnings. No authoritative reference available. No authoritative reference available. No authoritative reference available. Unamortized sale and leaseback costs. No authoritative reference available. Voluntary contribution by related parties to qualified pension plan. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Nuclear Plant Decommissioning Trusts. No authoritative reference available. No authoritative reference available. No authoritative reference available. Operating Leases Future Minimum Payments Due. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Costs avoided by customers. No authoritative reference available. No authoritative reference available. No authoritative reference available. Company Posted Collateral Related To Net Liability Positions. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Accumulated other comprehensive income loss. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. PCRBs remarketed and refinanced. No authoritative reference available. Volume Of Derivatives Sales. No authoritative reference available. Number of tranches won in second descending clock auction. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. FirstEnergy Solutions Corp Condensed Consolidating Statements of Income. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair value measurement with unobservable inputs reconciliation recurring basis asset and liability purchases total. No authoritative reference available. Reconciliation of Basic and Diluted Earnings per Share. . No authoritative reference available. Losses In Excess Of Private Insurance Contributed For Each Nuclear Unit License Per Unit. No authoritative reference available. Net Liability Position Under Commodity Derivative Contracts. No authoritative reference available. Revenues and receivables. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Deferred Tax Assets Liabilities Net Non current Deferred customer shopping incentive. No authoritative reference available. Defined benefit plan amounts that will be amortized from accumulated other comprehensive income loss in next fiscal year. No authoritative reference available. Receivables financing borrowing commitment. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Tranches offered in auction, Description. No authoritative reference available. Capital Leases Future Minimum Payments Net Present Value. No authoritative reference available. Deferred Tax Assets Liabilities Net Non current Nuclear decommissioning activities. No authoritative reference available. No authoritative reference available. No authoritative reference available. Reconciliation of changes in the fair value of level 3 pension investments. No authoritative reference available. Accounting for the effects of regulation. No authoritative reference available. Change to Company's earnings resulting from retiree healthcare liabilities and related tax impact already reflected in consolidated financial statements. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Loc Related To Sale And Lease Back. No authoritative reference available. No authoritative reference available. No authoritative reference available. Portion held by stockholders of subsidiary company in combined entity. No authoritative reference available. Preference Stock Shares Outstanding. No authoritative reference available. Assessment period costs. No authoritative reference available. Proposed greenhouse gas emissions reduction by 2050. No authoritative reference available. Net Periodic Pension and Other Post-Employment Benefits Costs. No authoritative reference available. No authoritative reference available. No authoritative reference available. Revised estimated cash flows associated with the ARO liabilities resulted by cost studies. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Net postretirement benefit cost related to Voluntary Enhanced Retirement Option. No authoritative reference available. Deferral of new regulatory assets. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Public liability assessed with respect to a single nuclear incident based on Price-Anderson Act. No authoritative reference available. Interest expense Income Recognised. No authoritative reference available. No authoritative reference available. No authoritative reference available. Unamortized gains included in long term debt associated with prior fixed for floating interest rate swap agreements Net of tax No authoritative reference available. Share based compensation arrangement by share-based payment award restricted common stock grants. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Expected adverse change in quoted market prices derivative instruments. No authoritative reference available. Percent change in confidence level over one year. No authoritative reference available. No authoritative reference available. No authoritative reference available. Total annual energy savings. No authoritative reference available. No authoritative reference available. No authoritative reference available. Uncertain tax position Net Interest Payable (Receivable). No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair Value Measurements With Unobservable Inputs Reconciliation Recurring Basis Liability Value. No authoritative reference available. Credit facility extended period. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fund to assist low income customers. No authoritative reference available. No authoritative reference available. No authoritative reference available. Reclassification to net income. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Deferred Tax Assets Liabilities Net Noncurrent Deferred gain for asset sales affiliated companies. No authoritative reference available. No authoritative reference available. No authoritative reference available. Uncertain tax position Net Interest expense income. No authoritative reference available. Losses In Excess Of Private Insurance Contributed For Each Nuclear Unit License. No authoritative reference available. No authoritative reference available. No authoritative reference available. Retrospective assessments liability. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Asset Retirement Obligation Period Increase Decrease. No authoritative reference available. Defined benefit plan estimated future benefit payments. No authoritative reference available. Regulatory and other Short-term debt limitations. No authoritative reference available. Guarantees and Surety Bonds Contracts. No authoritative reference available. Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Purchases. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Service Area. No authoritative reference available. Total Unamortized Gains Losses Included In Aocl Associated With Commodity Derivatives Net Of Tax. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Environmental Liabilities Former Gas Facilities. No authoritative reference available. Unamortized gains included in long-term debt associated with prior fixed-for-floating interest rate swap agreements. No authoritative reference available. Asset Impairment Charges. No authoritative reference available. No authoritative reference available. No authoritative reference available. Portion Of Insurance Coverage By Industry Retrospective Rating Plan. No authoritative reference available. No authoritative reference available. No authoritative reference available. Number of tranches served as a result of agreement. No authoritative reference available. Average Delivery Service Improvement Rider Collection Per Kilowatt Hours. No authoritative reference available. No authoritative reference available. No authoritative reference available. Charge to other paid in capital resulting from joint venture acquisition. No authoritative reference available. Electricity production from renewable sources. No authoritative reference available. No authoritative reference available. No authoritative reference available. Generation discount for low income customers. No authoritative reference available. No authoritative reference available. No authoritative reference available. Capping of SO2 emissions. No authoritative reference available. Long-term pollution control bond varible interest rate. No authoritative reference available. No authoritative reference available. No authoritative reference available. Purchased power from affiliates. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Utilities required to reduce peak demand in 2009 in percentage. No authoritative reference available. Summary of changes in FES' and Utilities' goodwill. No authoritative reference available. Accumulated impairment charge No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Projected Transmission Cost. No authoritative reference available. Deferred Tax Assets Liabilities Net Non current Unamortized investment tax credits. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. ffect of derivative instruments on statements of income and comprehensive income for instruments not in hedging relationships text block. No authoritative reference available. No authoritative reference available. No authoritative reference available. Number of tranches won in first descending clock auction. No authoritative reference available. Investment in associated companies. No authoritative reference available. No authoritative reference available. No authoritative reference available. Interest expense. No authoritative reference available. Expected Number Of Nuclear Power Plant Licensed To Operate. No authoritative reference available. Preference stock par or stated value per share. No authoritative reference available. Unamortized losses associated with prior interest rate hedges. No authoritative reference available. No authoritative reference available. No authoritative reference available. Number of stock based compensation programs. No authoritative reference available. Long-term interest rate of PCRBs. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Percentage of remaining stake acquired by joint venture in mining operations. No authoritative reference available. Deferred Tax Assets Liabilities Net Non current Lease market valuation liability. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements. No authoritative reference available. No authoritative reference available. No authoritative reference available. Number of options proposed by EPA for additional regulation of coal combustion residuals. No authoritative reference available. Volume Of Derivatives Net. No authoritative reference available. Borrowing sub-limits for each borrower and limitations on short-term indebtedness. No authoritative reference available. Defined Benefit Plan Target Allocation Percentage Of Assets Absolute Return Strategies. No authoritative reference available. Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Realized gain loss. No authoritative reference available. No authoritative reference available. No authoritative reference available. Reversal of accrued interest associated with the recognized tax benefits. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Defined Benefit Plan Absolute Return Strategies. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Number of additional tranches. No authoritative reference available. Power plants complaints. No authoritative reference available. No authoritative reference available. No authoritative reference available. Other Comprehensive Income Reclassification Adjustment Tax Portion. No authoritative reference available. Prepaid capital lease obligations. No authoritative reference available. No authoritative reference available. No authoritative reference available. Variable Interest Entities Percentage Of Equity Interest Held By Wholly Owned Subsidiary Of Entity Four. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Operating lease term of Other Subsidiaries . No authoritative reference available. No authoritative reference available. No authoritative reference available. Variable interest entities percentage of mining operations acquired by joint venture. No authoritative reference available. Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Share Based Compensation Arrangement By Share Based Payment Award Stock Option. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Purchase of lessor equity interests in sale and leaseback. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Percentage of additional economic interest purchased by entity one. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Other postretirement benefit investments measured at fair value. No authoritative reference available. Accumulated deferred income taxes. No authoritative reference available. No authoritative reference available. No authoritative reference available. Defined Benefit Plan Assumed Health Care Cost Trend Rates. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Defined benefit plan amounts recognized in balance sheet. No authoritative reference available. Infrastructure and energy projects. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. New Voltage transmission facilities and zonal transmission rate. No authoritative reference available. No authoritative reference available. No authoritative reference available. Deferred Tax Assets Liabilities Net Non current Customer receivables for future income taxes. No authoritative reference available. Interest expense to affiliates No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Preferred stock and preference stock number of shares authorized and par value disclosures. No authoritative reference available. Number Of Employees Opted For Voluntary Enhanced Retirement Option. No authoritative reference available. Other Comprehensive Income Reclassification Adjustment Total Before Tax. No authoritative reference available. No authoritative reference available. No authoritative reference available. Decrease in the amount recovered for costs incurred. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Variable interest entities percentage of transportation operations acquired by joint venture. No authoritative reference available. Deferred Tax Assets Liabilities Net Non current Pension and other postretirement obligations. No authoritative reference available. No authoritative reference available. No authoritative reference available. Period of repayment of borrowings. No authoritative reference available. Adjustment to Kilowatt-hour excise tax related to prior periods. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Deferral of above market costs for power supply. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Future amortization expense, years thereafter. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Net deferred losses on derivative instruments in accumulated other comprehensive losses after tax to be reclassified to earnings. No authoritative reference available. Total Capitalization. No authoritative reference available. Finite lived intangible assets, future amortization expense. No authoritative reference available. Decrease net income due to adverse change in commodity prices,Net of tax. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Surety bonds and lines of credit. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule of goodwill by segment. No authoritative reference available. No authoritative reference available. No authoritative reference available. Duration of note issued by joint venture. No authoritative reference available. Coverage of decontamination costs as per property damage insurance. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair value measurements with unobservable inputs reconciliation recurring basis asset and liability net value. No authoritative reference available. Transactions with affiliated companies. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Percentage of POLR load of Subsidiary served by the company. No authoritative reference available. Long Term Contract For Purchase of Electric Power Cost Incurred. No authoritative reference available. Senior secured term loan facility. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Volume Of Derivatives Purchases. No authoritative reference available. Tranches offered in first descending clock auction, Delivery Period Description. No authoritative reference available. No authoritative reference available. No authoritative reference available. Deferred Tax Assets Liabilities Net Non current Unrealized losses on derivative hedges. No authoritative reference available. No authoritative reference available. No authoritative reference available. Defined benefit plan target allocation percentage of assets, Total. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Nuclear incident liability not more than in any one year per incident of Parent and Subsidiary company's based on their present nuclear ownership and leasehold interests. No authoritative reference available. Cash Balance Excluded From Available For Sale Securities. No authoritative reference available. Long Term Debt By Maturity. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Losses to be amortized to interest expenses during next tweleve months. No authoritative reference available. Defined Benefit Plan Assets Target Allocations. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair value measurement with unobservable inputs reconciliation recurring basis unrealized gain (loss) total. No authoritative reference available. Net Plant Excluding Construction Work In Progress. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Assets and Liabilities Measured on Recurring Basis. No authoritative reference available. Basic terms of operating lease. No authoritative reference available. Defined Benefit Plan Actual Return On Plan Assets Unrealized Gains Losses. No authoritative reference available. Credit Facility For Pollution Control Revenue Bonds Disclosure. No authoritative reference available. Offsetting primarily related to tax items. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Provision For Income Taxes. No authoritative reference available. Deferred Tax Assets Liabilities Net Non current Regulatory transition charge. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Interest income. No authoritative reference available. No authoritative reference available. No authoritative reference available. Maximum aggregate assessment for incidents (approximately). No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Equity Instruments Other Than Options Grants In Period Weighted Average Vesting Period. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Variable interest entities net present value of parent company consolidated sale and leaseback operating lease commitments. No authoritative reference available. No authoritative reference available. No authoritative reference available. Environmental Remediation Liabilities Accrued. No authoritative reference available. No authoritative reference available. No authoritative reference available. Deferred Rents And Lease Market Valuation Liability. No authoritative reference available. Reply comments in days. No authoritative reference available. No authoritative reference available. No authoritative reference available. Surplus Margin Guaranty. No authoritative reference available. Principal Default Amount Specified In Debt Covenants. No authoritative reference available. No authoritative reference available. No authoritative reference available. Nuclear Incidence liability not more than in any one year per incident of Parent and Subsidiary company's based on their present nuclear ownership and leasehold interests. No authoritative reference available. No authoritative reference available. No authoritative reference available. Receivable Financing Borrowing Commitment. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Variable interest entities economic interest of entity two in joint venture. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Operating And Capital Leases Expenses. No authoritative reference available. Decrease In Corporate Capital Facilities. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Load Cap related to new ESP. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Leasehold improvement payments to associated companies. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Tranches won in descending clock auction Description. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Issuances. No authoritative reference available. Tranche product description in first descending clock auction. No authoritative reference available. Fair value measurement with unobservable inputs reconciliation recurring basis realized gain loss total. No authoritative reference available. Merger Transactions Costs Net Of Tax. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Reconciliation of changes in the fair value of Nug contracts. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair value of commodity derivatives. No authoritative reference available. Decrease in OES capital facilities. No authoritative reference available. Cash Collateral Net. No authoritative reference available. Deferred Tax Assets Liabilities Net Non current Loss carry forward valuation reserve. No authoritative reference available. Period of revolving credit facility. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Tranche product description in second descending clock auction. No authoritative reference available. No authoritative reference available. No authoritative reference available. Insurance coverage for replacement power costs. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Deferred Tax Assets Liabilities Net Non current Allowance for equity funds used during construction. No authoritative reference available. Property taxes. No authoritative reference available. Variable interest entities distributions to owners. No authoritative reference available. Deferred Compensation Arrangement With Individual Number Of Shares Available For Grant. No authoritative reference available. Annual facility fee. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Share based compensation arrangement by share based payment award restricted common stock units. No authoritative reference available. No authoritative reference available. No authoritative reference available. Tranches served as a result of agreement Percentage, Description. No authoritative reference available. Defined Benefit Plan Private Equities. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Deferred Tax Assets Liabilities Net Non current Mark to market adjustments. No authoritative reference available. Period Of Time When Replacement Power Costs Incurred By During Outage. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Adjusted accumulated deferred income taxes. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Subsidiary one Operating lease term of Subsidiary one. No authoritative reference available. No authoritative reference available. No authoritative reference available. Variable interest entities economic interest of entity one in joint venture. No authoritative reference available. Products and Services. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Uppper threshold limit for carbon di oxide emission. No authoritative reference available.