Accounts payable Customers Accrued taxes Accumulated other comprehensive loss Less - Accumulated provision for depreciation Other paid-in capital Property additions Deferred purchased power and other costs Gain on asset sales Accumulated provision for uncollectible accounts - customers Nuclear fuel and lease amortization Amortization of regulatory assets Asset retirement obligations Cash and cash equivalents Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Net controlled disbursement activity Accrued compensation and retirement benefits Accrued taxes Accrued interest Materials and supplies Prepaid taxes Accounts payable (Increase) Decrease in Operating Capital [Abstract] Power purchase contract asset Common stock - shares authorized Common stock - shares outstanding Common stock COMPREHENSIVE INCOME Construction work in progress Fuel Purchased power Currently payable long-term debt Long-term debt and other long-term obligations Nuclear plant decommissioning trusts Provision for depreciation DILUTED EARNINGS PER SHARE OF COMMON STOCK Stock-based compensation Investment impairment (Increase) Decrease in Other Operating Assets Subsidiaries' Preferred Stock Dividends Materials and supplies, at average cost Total liabilities and capitalization Total current liabilities Total investments Investments in lease obligation bonds Noncontrolling interest Net cash provided from financing activities Net cash used for investing activities Net cash provided from operating activities NET INCOME Net change in cash and cash equivalents Interest expense Total deferred charges and other assets Total noncurrent liabilities OPERATING INCOME Total revenues Other Other comprehensive income (loss) Pension and other postretirement benefits Unrealized gain (loss) on derivative hedges Other comprehensive income (loss), net of tax Income tax expense (benefit) related to other comprehensive income Change in unrealized gain on available-for-sale securities Other Other Other Other Other Common stock dividend payments Prepaid taxes Long-term debt Sales of investment securities held in trusts Proceeds from asset sales Short-term borrowings, net In service Total property, plant and equipment Purchases of investment securities held in trusts Cash investments Regulatory assets Long-term debt Retained earnings Electric utilities Unregulated businesses Deferred gain on sale and leaseback transaction Short-term borrowings General taxes Total current assets WEIGHTED AVERAGE NUMBER OF DILUTED SHARES OUTSTANDING WEIGHTED AVERAGE NUMBER OF BASIC SHARES OUTSTANDING Total assets Investment income (loss), net Other Other DIVIDENDS DECLARED PER SHARE OF COMMON STOCK Accumulated deferred income taxes BASIC EARNINGS PER SHARE OF COMMON STOCK Provision for depreciation Electric service prepayment programs Other Other operating expenses INCOME BEFORE INCOME TAXES Deferred income taxes and investment tax credits, net Common stock - par value Total common stockholders' equity INCOME TAXES Capitalized interest Retirement benefits Receivables Lease market valuation liability Total expenses Total in service, net of accumulated depreciation Period end amount of total net PPE Total capitalization total stockholders' equity, term debt and other long-term obligations. Power purchase contract liability Net present value of the above market portion of purchase power contract Total obligations incurred as part of normal operations that is expected to be repaid beyond the following twelve months or one business cycle. Deferral of new regulatory assets Current period electric expenses of a regulated entity which are reclassified as capitalized electric costs and are expected to be recoverable through rate adjustments. Operating Income (Expense) [Abstract] Total other expense The total of other income and expense items resulting from secondary business-related activities, excluding those considered part of the normal operations of the business that have not been previously categorized. Deferred rents and lease market valuation liability Cash collateral received (paid) Cash received from or paid to suppliers based on deposits required for hedging activities. New Financing Redemptions and Repayments Notes to Financial Statements Accumulated provision for uncollectible accounts - other Total equity The sum of Total Common Stockholders Equity and Noncontrolling Interest EARNINGS AVAILABLE TO PARENT The portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes. Net Income (Loss) Attributable to Parent, Total Less: Noncontrolling interest income (loss) The portion of net income (loss) attributable to the noncontrolling interest (if any) deducted in order to derive the portion attributable to the parent. Net Income (Loss) Attributable to Noncontrolling Interest, Total COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTEREST Net Income (Loss) Attributable to Parent [Abstract] Total Equity [Abstract] COMPREHENSIVE INCOME ATTRIBUTABLE TO PARENT This element represents Other Comprehensive Income (Loss), Net of Tax, for the period attributable to the parent entity. Includes deferred gains (losses) on qualifying hedges, unrealized holding gains (losses) on available-for-sale securities, minimum pension liability, and cumulative translation adjustment. Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Parenthetical Information [Abstract] Uncollectible Accounts [Abstract]