Retail revenues Retail Revenues Revenues from sales of electric energy to retail regulated customers. Wholesale revenues Wholesale Revenues Revenues from sales of energy supplied by one producer or marketer to another for eventual resale to consumers. Other electric revenues Other Electric Revenues Other operating revenues of electric companies not elsewhere specified in the taxonomy. Other revenues Other Sales Revenue, Net Total operating revenues Revenues Fuel Utilities Operating Expense, Fuel Used Purchased power Cost of Purchased Power Other operations and maintenance Utilities Operating Expense, Maintenance and Operations MC Asset Recovery litigation settlement Gain (Loss) Related to Litigation Settlement, Total Gain (Loss) Related to Litigation Settlement Depreciation and amortization Depreciation And Amortization Excluding Nuclear Fuel The current period expense charged against earnings on long-lived, physical assets used in the normal conduct of business and not intended for resale to allocate or recognize the cost of assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset. Excludes amortization of nuclear fuel. Taxes other than income taxes Taxes, Miscellaneous Total operating expenses Costs and Expenses Operating Income Operating Income (Loss), Total Operating Income (Loss) Allowance for equity funds used during construction Allowance For Equity Funds Used During Construction Total increase in earnings in the period representing the cost of equity (rate of return) used to finance construction of regulated assets, which is expected to be recovered through rate adjustments. Interest income Investment Income, Interest and Dividend, Total Investment Income, Interest and Dividend Equity in (losses) income of unconsolidated subsidiaries Income (Loss) from Equity Method Investments, Total Income (Loss) from Equity Method Investments Leveraged lease income (losses) Leveraged Leases, Income (Loss), Total Leveraged Leases, Income (Loss) Gain on disposition of lease termination Gain (Loss) on Contract Termination Loss on extinguishment of debt Gains (Losses) on Extinguishment of Debt, before Write off of Deferred Debt Issuance Cost Interest expense, net of amounts capitalized Interest and Debt Expense, Total Interest and Debt Expense Other income (expense), net Other Nonoperating Income (Expense) Total other income and (expense) Nonoperating Income (Expense) Income taxes Income Tax Expense (Benefit) Consolidated net income Consolidated Net Income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Dividends on Preferred and Preference Stock of Subsidiaries Net Income (Loss) Attributable to Noncontrolling Interest Consolidated Net Income After Dividends on Preferred and Preference Stock of Subsidiaries Net Income (Loss) Available to Common Stockholders, Basic Earnings per share (EPS) - Earnings Per Share [Abstract] Basic EPS Earnings Per Share, Basic, Total Earnings Per Share, Basic Diluted EPS Diluted EPS Earnings Per Share, Diluted Basic Weighted Average Number of Shares Outstanding, Basic, Total Weighted Average Number of Shares Outstanding, Basic Diluted Diluted Weighted Average Number of Shares Outstanding, Diluted Cash dividends paid per share of common stock Common Stock, Dividends, Per Share, Cash Paid Consolidated Statements of Income [Abstract] Hedge settlements Hedge settlements The cash outflow (inflow) for a financial contract that settles in the period relating to operating activities. -Accrued taxes Increase Decrease In Accrued Taxes The net change during the period in the amount of cash payments due to taxing authorities for income and nonincome-related taxes. Change in construction payables Change In Construction Payables The net change during the reporting period in the aggregate amount of construction obligations due within one year (or one business cycle). This includes accounts payable related to construction activities. Proceeds [Abstract] Proceeds. Redemptions [Abstract] Redemptions. Common Stock Data [Abstract] Common Stock Data. Unbilled revenues Unbilled Revenues Current Carrying amount at the balance sheet date of revenues which have been earned but not yet billed. Under recovered regulatory clause revenues Under Recovered Regulatory Clause Revenues Carrying amount at the balance sheet date of customer accounts receivable for retail and wholesale under recovered fuel costs, and other under recovered regulatory costs. Other accounts and notes receivable Other Accounts Notes And Loans Receivable Amounts due from customers or clients, within one year of the balance sheet date (or one operating cycle, if longer), for goods or services that have been delivered or sold in the normal course of business and an amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date within one year of the balance sheet, not elsewhere specified in the taxonomy. Vacation pay Vacation Pay Carrying amount at the balance sheet date of the regulatory asset related to vacation pay to employees. Other regulatory assets, current Other Regulatory Assets Current Carrying amount of other regulatory assets (not elsewhere included) as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost. Plant in service, net of depreciation Plant In Service Net Of Depreciation Carrying amount at the balance sheet date for long-lived physical assets used in the normal conduct of business and not intended for resale, less depreciation. Nuclear fuel, at amortized cost Nuclear Fuel At Amortized Cost The carrying amount as of the balance sheet of nuclear fuel held as property plant and equipment. This amount is net of amortization based on the energy produced over the life of the fuel. Deferred Charges And Other Assets [Abstract] Deferred Charges and Other Assets. Deferred charges related to income taxes Deferred Charges Related To Income Taxes Noncurrent regulatory assets associated with deferred income tax liabilities that are expected to be recovered from customers through the ratemaking process. Deferred under recovered regulatory clause revenues Deferred Under Recovered Regulatory Clause Revenues Carrying amount at the balance sheet date of underrecovered fuel costs allowed to be deferred by regulatory authorities, that are expected to be recoverable through rate adjustments after one year. Other regulatory assets, deferred Other Regulatory Assets Deferred Carrying amount of other regulatory assets (not elsewhere identified) 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. Unrecognized tax benefits Unrecognized Tax Benefits Accrued Taxes Liability associated with tax benefits that do not currently fully meet the "more likely than not" threshold as defined by FIN 48. This line item includes both federal and state taxes. Other regulatory liabilities, current Other regulatory liabilities, current The amount for other current regulatory liabilities not elsewhere included. Regulatory liabilities represent probable future reductions in revenues associated with amounts that are expected to be credited to customers through the ratemaking process. These revenues are expected to be credited within one year. Deferred Credits And Other Liabilities [Abstract] Deferred Credits and Other Liabilities. Deferred credits related to income taxes Deferred credits related to income taxes Noncurrent regulatory liabilities associated with deferred income tax liabilities. Regulatory liabilities represent probable future reductions in revenues associated with amounts that are expected to be credited to customers through the ratemaking process. These revenues are not expected to be credited within one year or the normal operating cycle if longer. Other cost of removal obligations Other Cost Of Removal Obligations The regulatory liability as of the balance sheet date for the amount recovered from ratepayers for removal costs associated with utility plant in service which are not recognized as a liability under Statement of Financial Accounting Standards No. 143, "Accounting for Asset Retirement Obligations" and FASB Interpretation No. 47, "Accounting for Conditional Asset Retirement Obligations." Other regulatory liabilities, deferred Other regulatory liabilities, deferred The amount for other noncurrent regulatory liabilities not elsewhere included. Regulatory liabilities represent probable future reductions in revenues associated with amounts that are expected to be credited to customers through the ratemaking process. These revenues are not expected to be credited within one year or the normal operating cycle if longer. Operating Revenues: Revenues [Abstract] Other Income and (Expense): Nonoperating Income (Expense) [Abstract] Consolidated Statement of Common Stockholders' Equity [Abstract] Consolidated Net Income Operating Activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile consolidated net income to net cash provided from operating activities - Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization, total Depreciation, Amortization and Accretion, Net, Total Depreciation, Amortization and Accretion, Net Deferred revenues Recognition of Deferred Revenue Pension, postretirement, and other employee benefits Pension and Other Postretirement Benefit Expense, Total Pension and Other Postretirement Benefit Expense Stock based compensation expense Stock Option Plan Expense Other, net Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities, Other Changes in certain current assets and liabilities - Increase (Decrease) in Operating Capital [Abstract] -Receivables Increase (Decrease) in Receivables, Total Increase (Decrease) in Receivables -Fossil fuel stock Increase (Decrease) in Fossil Fuel Inventories, Total Increase (Decrease) in Fossil Fuel Inventories -Materials and supplies Increase (Decrease) in Raw Materials, Packaging Materials and Supplies Inventories -Other current assets Increase (Decrease) in Other Operating Assets -Accounts payable Increase (Decrease) in Accounts Payable, Total Increase (Decrease) in Accounts Payable -Accrued compensation Increase (Decrease) in Accrued Salaries -Other current liabilities Increase (Decrease) in Other Operating Liabilities Net cash provided from operating activities Net cash provided from operating activities Net Cash Provided by (Used in) Operating Activities Property additions Payments to Acquire Property, Plant, and Equipment, Total Payments to Acquire Property, Plant, and Equipment -Other current liabilities Investment in restricted cash from pollution control revenue bonds Payments for Investment in Restricted Cash from Pollution Control Bond Distribution of restricted cash from pollution control revenue bonds Proceeds from Distribution of Restricted Cash from Pollution Control Bond Nuclear decommissioning trust fund purchases Payments to Invest in Decommissioning Fund Nuclear decommissioning trust fund sales Proceeds from Decommissioning Fund Proceeds from property sales Proceeds from Sale of Productive Assets, Total Proceeds from Sale of Productive Assets Cost of removal, net of salvage Payments for (Proceeds from) Removal Costs Other investing activities Payments for (Proceeds from) Other Investing Activities Net cash used for investing activities Net Cash Provided by (Used in) Investing Activities Financing Activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Investing Activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Decrease in notes payable, net Proceeds from (Repayments of) Short-term Debt, Total Proceeds from (Repayments of) Short-term Debt Proceeds - Long-term debt issuances Proceeds from Issuance of Long-term Debt and Capital Securities, Net, Total Proceeds from Issuance of Long-term Debt and Capital Securities, Net Common stock issuances Proceeds from Issuance of Common Stock Redemptions - Long-term debt Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities, Total Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities Redeemable preferred stock Payments for Repurchase of Redeemable Preferred Stock Payment of common stock dividends Payments of Dividends, Common Stock Payment of dividends on preferred and preference stock of subsidiaries Payments of Dividends, Noncontrolling Interest Other financing activities Proceeds from (Payments for) Other Financing Activities Other financing activities Net cash provided from financing activities Net Cash Provided by (Used in) Financing Activities Net Change in Cash and Cash Equivalents Cash and Cash Equivalents, Period Increase (Decrease), Total Cash and Cash Equivalents, Period Increase (Decrease) Cash and Cash Equivalents, at Carrying Value, Total Cash and Cash Equivalents at Beginning of Year Cash and Cash Equivalents at End of Year Cash and Cash Equivalents, at Carrying Value Total Assets Total Assets Assets Other deferred charges and assets Other deferred charges and assets Other Assets, Noncurrent Unamortized loss on reacquired debt Unamortized Loss Reacquired Debt, Noncurrent Unamortized debt issuance expense Unamortized Debt Issuance Expense Total other property and investments Long-term Investments Miscellaneous property and investments Other Long-term Investments Leveraged leases Leveraged Leases, Balance Sheet, Investment in Leveraged Leases, Net, Total Leveraged Leases, Balance Sheet, Investment in Leveraged Leases, Net Nuclear decommissioning trusts, at fair value Decommissioning Fund Investments Other Property and Investments: Long-term Investments [Abstract] Total property, plant, and equipment Property, Plant and Equipment, Net, Beginning Balance Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net Construction work in progress Construction in Progress, Gross Less accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Beginning Balance Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment In service Property, Plant and Equipment, Gross, Total Property, Plant and Equipment, Gross, Beginning Balance Property, Plant and Equipment, Gross, Ending Balance Property, Plant and Equipment, Gross Property, Plant and Equipment, Net [Abstract] Property, Plant, and Equipment: Total current assets Assets, Current Other current assets Other Assets, Current Prepaid expenses Prepaid Expense, Current, Total Prepaid Expense, Current Materials and supplies, at average cost Other Inventory, Supplies Fossil fuel stock, at average cost Energy Related Inventory, Other Fossil Fuel Accumulated provision for uncollectible accounts Allowance for Doubtful Accounts Receivable, Current, Beginning Balance Allowance for Doubtful Accounts Receivable, Current, Ending Balance Allowance for Doubtful Accounts Receivable, Current Customer accounts receivable Accounts Receivable, Gross, Current Restricted cash and cash equivalents Restricted Cash and Investments, Current, Total Restricted Cash and Investments, Current Cash and cash equivalents Total Liabilities and Stockholders' Equity Liabilities and Stockholders' Equity Total Stockholders' Equity (See accompanying statements) Beginning Balance Ending Balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Redeemable Preferred Stock of Subsidiaries (See accompanying statements) Temporary Equity, Carrying Amount Total Liabilities Liabilities Other deferred credits and liabilities Other Liabilities, Noncurrent Asset retirement obligations Asset Retirement Obligations, Noncurrent, Total Asset Retirement Obligations, Noncurrent, Ending Balance Asset Retirement Obligations, Noncurrent Employee benefit obligations Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent, Total Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent Accumulated deferred investment tax credits Accumulated Deferred Investment Tax Credit Accumulated deferred income taxes Deferred Tax Liabilities, Noncurrent Deferred Credits and Other Liabilities: Long-Term Debt (See accompanying statements) Long-term Debt and Capital Lease Obligations Total current liabilities Liabilities, Current Other current liabilities Other Liabilities, Current Liabilities from risk management activities Derivative Instruments and Hedges, Liabilities, Total Derivative Instruments and Hedges, Liabilities Accrued vacation pay Accrued Vacation, Current Accrued interest Interest Payable, Current Other accrued taxes Accrual for Taxes Other than Income Taxes, Current Accrued income taxes Accrued Income Taxes, Current Customer deposits Customer Deposits, Current Accounts payable Accounts Payable, Current, Total Accounts Payable, Current Notes payable Short-term Borrowings, Total Short-term Borrowings Securities due within one year Long-term Debt and Capital Lease Obligations, Current, Total Long-term Debt and Capital Lease Obligations, Current Current Liabilities: Liabilities, Current [Abstract] Liabilities and Stockholders' Equity Liabilities and Stockholders' Equity [Abstract] Consolidated Statements of Comprehensive Income [Abstract] Other comprehensive income (loss): Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract] Qualifying hedges: Other Comprehensive Income, Derivatives Qualifying as Hedges, Net of Tax [Abstract] Changes in fair value, net of tax of $(3), $(19), and $(3), respectively Other Comprehensive Income, Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Reclassification adjustment for amounts included in net income, net of tax of $18, $7, and $6, respectively Other Comprehensive Income, Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax Marketable securities: Other Comprehensive Income, Available-for-sale Securities Adjustment, Net of Tax [Abstract] Changes in fair value, net of tax of $1, $(4), and $3, respectively Other Comprehensive Income, Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Reclassification adjustment for amounts included in net income, net of tax of $-, $-, and $-, respectively Other Comprehensive Income, Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax Pension and other postretirement benefit plans: Other Comprehensive Income, Defined Benefit Plans Adjustment, Net of Tax [Abstract] Reclassification adjustment for amounts included in net income, net of tax of $1, $1, and $1, respectively Other Comprehensive Income, Reclassification of Defined Benefit Plan's Net (Gain) Loss Recognized in Net Periodic Benefit Cost, Net of Tax Consolidated Comprehensive Income Consolidated Comprehensive Income Comprehensive Income, Net of Tax, Including Portion Attributable to Noncontrolling Interest Changes in fair value of qualifying hedges, tax Other Comprehensive Income, Unrealized Gain (Loss) on Derivatives Arising During Period, Tax Reclassification adjustment for amounts of qualifying hedges included in net income, tax Other Comprehensive Income, Reclassification Adjustment on Derivatives Included in Net Income, Tax Change in fair value of marketable securities, tax Other Comprehensive Income, Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Reclassification adjustment for amounts of marketable securities included in net income, tax Other Comprehensive Income, Reclassification Adjustment for Sale of Securities Included in Net Income, Tax Reclassification adjustment for amounts of pension and other post retirement benefit plans included in net income, tax Other Comprehensive Income, Reclassification of Defined Benefit Plan's Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Tax Assets Assets [Abstract] Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance Accumulated Other Comprehensive Income (Loss), Net of Tax Retained earnings Retained Earnings (Accumulated Deficit), Total Retained Earnings (Accumulated Deficit), Beginning Balance Retained Earnings (Accumulated Deficit), Ending Balance Retained Earnings (Accumulated Deficit) Treasury, at cost Treasury Stock, Value, Beginning Balance Treasury Stock, Value, Ending Balance Treasury Stock, Value Paid-in capital Additional Paid in Capital, Common Stock, Beginning Balance Additional Paid in Capital, Common Stock, Ending Balance Additional Paid in Capital, Common Stock Consolidated Statements of Cash Flows [Abstract] Consolidated Balance Sheets [Abstract] Assets, Current [Abstract] Common Stock, Value, Issued Statement [Table] Statement [Line Items] Statement, Equity Components [Axis] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Retirement Benefits [Abstract] RETIREMENT BENEFITS Pension and Other Postretirement Benefits Disclosure [Text Block] Income Taxes [Abstract] INCOME TAXES Income Tax Disclosure [Text Block] Commitments [Abstract] Commitments. COMMITMENTS Commitments Disclosure [Text Block] Common Stock [Abstract] Fair Value Measurements [Abstract] Fair Value Measurements. FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] Segment and Related Information [Abstract] Segment and Related Information. SEGMENT AND RELATED INFORMATION Segment Reporting Disclosure [Text Block] Nuclear Insurance [Abstract] Nuclear Insurance. NUCLEAR INSURANCE NUCLEAR INSURANCE Text Block Disclosures related to insurance pertaining to nuclear facilities. Quarterly Financial Information (Unaudited) [Abstract] QUARTERLY FINANCIAL INFORMATION (UNAUDITED) Quarterly Financial Information [Text Block] Stock issued Stock Issued During Period, Value, New Issues Cash dividends Dividends, Common Stock, Cash Other Other Stockholders' Equity, Other Contingencies and Regulatory Matters [Abstract] Contingencies and Regulatory Matters. Contingencies And Regulatory Matters [Text Block] Contingencies and Regulatory Matters. CONTINGENCIES AND REGULATORY MATTERS Financing [Abstract] Financing. Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Interest expense, net of amounts capitalized Allowance for equity funds used during construction Equity in (income) losses of unconsolidated subsidiaries Leveraged lease (income) losses Common Stock Data: Common stock equity Common Stock, Value, Issued, Total Common Stock, Value, Issued, Beginning Balance Common Stock, Value, Issued, Ending Balance Book value per share Common Stock, Par or Stated Value Per Share Common stock, shares Authorized Common Stock, Shares Authorized Common stock, shares Issued Common Stock, Shares, Issued, Total Common Stock, Shares, Issued Treasury shares Treasury Stock, Shares, Beginning Balance Treasury Stock, Shares, Ending Balance Treasury Stock, Shares Current Assets: Deferred Charges and Other Assets: Document and Company Information [Abstract] Document and Company Information. Entity Public Float Entity Common Stock, Shares Outstanding Cumulative effect of new accounting standards Cumulative Effect of Initial Adoption of New Accounting Principle Accumulated provision for uncollectible accounts Summary of Significant Accounting Policies [Abstract] Summary of Significant Accounting Policies [Abstract] Joint Ownership Agreements [Abstract] Joint Ownership Agreements [Abstract] Receivables - Receivables, Net, Current [Abstract] Accrued taxes - Taxes Payable, Current [Abstract] Operating Expenses: Costs and Expenses [Abstract] Other comprehensive income: Other Comprehensive Income (Loss), Net of Tax [Abstract] Long-term Debt Valuation and Qualifying Accounts [Abstract] Valuation and Qualifying Accounts. VALUATION AND QUALIFYING ACCOUNTS Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Average number of shares of common stock outstanding - (in millions) Weighted Average Number of Shares Outstanding, Diluted [Abstract] Property additions Investment in restricted cash from pollution control revenue bonds Nuclear decommissioning trust fund purchases Cost of removal, net of salvage Other investing activities Long-term debt Redeemable preferred stock Payment of common stock dividends Payment of dividends on preferred and preference stock of subsidiaries Less accumulated depreciation Treasury, at cost Loss on extinguishment of debt Gain on disposition of lease termination Dividends on preferred and preference stock of subsidiaries Preferred and preference stock Proceeds from Noncontrolling Interests Investment tax credits Investment Tax Credit Benefit plan net gain (loss),net of tax of $(8), $(32) and $13, respectively Other Comprehensive Income, Defined Benefit Plan's Net Unamortized (Gain) Loss Arising During Period, Net of Tax Additional prior service costs from amendment to non-qualified plans, net of tax of $-, $-, and $(2), respectively Other Comprehensive Income, Defined Benefit Plan, Net Prior Service Costs (Credit) Arising During Period, Net of Tax Beginning Balance, shares Ending Balance, shares Shares, Issued Other Net income after dividends on preferred and preference stock of subsidiaries Other Treasury Stock, Shares, Acquired Treasury Stock, Shares, Acquired Stock issued, shares Stock Issued During Period, Shares, New Issues Redeemable Preferred Stock Total Capitalization Capitalization, Long-term Debt and Equity Common Stockholders' Equity: Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] Long-term senior notes and debt -- Long-term Debt, Unclassified [Abstract] Long-Term Debt: Long-term Debt and Capital Lease Obligations [Abstract] Maturity Maturities of Long-term Debt [Abstract] 2010 Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 2011 Long-term Debt, Maturities, Repayments of Principal in Year Two 2012 Long-term Debt, Maturities, Repayments of Principal in Year Three 2013 Long-term Debt, Maturities, Repayments of Principal in Year Four 2014 Long-term Debt, Maturities, Repayments of Principal in Year Five 2009 2009 Maturity Of Long Term Senior Notes And Debt In Year One. 2010 2010 Maturity Of Long Term Senior Notes And Debt In Year Two. 2011 2011 Maturity Of Long Term Senior Notes And Debt In Year Three. 2012 2012 Maturity Of Long Term Senior Notes And Debt In Year Four. 2013 2013 Maturity Of Long Term Senior Notes And Debt In Year Five. 2014 2014 Maturity Of Long Term Senior Notes And Debt In Year Six. 2015 through 2048 2015 through 2048 Maturity Of Long Term Senior Notes And Debt After Year Six. Common stock, Par value Interest Rates, Minimum Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum Interest Rates, Maximum Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum Total Common Stockholders' Equity Total common stockholders' equity Total of all Common Stockholders' Equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity. This excludes temporary equity and preferred and preference stockholders' equity. Total common stockholders' equity Preference Stock, $1 par value Preference Stock Type One. Preference Stock, $100 par or stated value Preference Stock Type Two. Redeemable Preferred Stock, $100 par or stated value Redeemable Preferred Stock Type One. Redeemable Preferred Stock, $1 par value Redeemable Preferred Stock Type Two. Total stockholders' equity Total Capitalization Preferred Stock, Par or Stated Value Per Share Preferred Stock, Par or Stated Value Per Share Common stock, par value $5 per share Noncumulative Preferred Stock Total Capitalization, in Percent Total Capitalization In Percent Total Capitalization in Percent. Total common stockholders' equity, in percent of Total Capitalization Total common stockholders' equity, in percent of Total Capitalization As a percent of total capitalization, the total of all Common Stockholders' Equity (deficit) items, net of receivables from officers, directors owners, and affiliates of the entity. This excludes temporary equity and preferred and preference stockholders' equity. Total long-term senior notes and debt Total long-term senior notes and debt Including the current and noncurrent portions, carrying value as of the balance sheet date of Long-term Notes and Other Long-term Debt with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders. Long-term debt excluding amount due within one year Unamortized debt (discount), net Debt Instrument, Unamortized Discount (Premium), Net, Total Debt Instrument, Unamortized Discount (Premium), Net MC Asset Recovery litigation settlement Redeemable Preferred Stock of Subsidiaries: Redeemable Preferred Stock Of Subsidiaries Abstract Redeemable Preferred Stock of Subsidiaries. Preferred and Preference Stock of Subsidiaries: Preferred And Preference Stock Of Subsidiaries Abstract Preferred and Preference Stock of Subsidiaries. Unamortized debt (discount), net Security, Class of Redeemable Preferred Stock [Axis] Redeemable Preferred Stock [Domain] Class of Stock [Axis] Class of Stock [Domain] Debt Instrument [Axis] Debt Instrument, Name [Domain] Long-term Debt, Maturities, Repayments of Principal after Year Five Preferred Stock, Shares Authorized Preferred Stock, Shares Outstanding Construction work in progress Commitments and Contingencies Commitments and Contingent Matters Cash dividends paid per share of common stock Other Comprehensive Income, Defined Benefit Plan's Net Unamortized Gain (Loss) Arising During Period, Tax Benefit plan net gain (loss), tax Additional prior service costs from amendment to non-qualified plans, tax Other Comprehensive Income, Defined Benefit Plan, Net Prior Service Costs Arising During Period ,Tax Other, shares Consolidated Statement of Capitalization [Abstract] 2015 through 2048 Other long-term debt -- Other Long-term Debt [Abstract] Pollution control revenue bonds -- Long-term Pollution Control Bond [Abstract] Total other long-term debt Other Long-term Debt Capitalized lease obligations Capital Lease Obligations Total long-term debt (annual interest requirement -- $ 894 million) Long Term Debt And Capital Lease Obligation Net Total Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, plus capital lease obligations. Unamortized debt (discount), net Redeemable Cumulative preferred stock, Authorized Redeemable Preferred Stock, Shares Authorized Redeemable Cumulative preferred stock, Outstanding Redeemable Preferred Stock, Shares Outstanding Adjustable Rates Redeemable Preferred Stock, $25 stated value Redeemable Preferred Stock Type Three. Cumulative Preferred Stock Total long-term senior notes and debt Equity Component [Domain] Parent Member Common Stock Treasury Stock Retained Earnings Accumulated Other Comprehensive Income Common Stock Treasury Stock Retained Earnings Accumulated Other Comprehensive Income Deferred revenues Hedge settlements Additional prior service costs from amendment to non-qualified plans, net of tax of $-, $-, and $(2), respectively Reclassification adjustment for amounts included in net income, net of tax of $-, $-, and $-, respectively Reclassification adjustment for amounts included in net income, net of tax of $18, $7, and $6, respectively Reclassification adjustment for amounts of qualifying hedges included in net income, tax Reclassification adjustment for amounts of marketable securities included in net income, tax Reclassification adjustment for amounts of pension and other post retirement benefit plans included in net income, tax Reclassification adjustment for amounts included in net income, net of tax of $1, $1, and $1, respectively Total deferred charges and other assets Total Deferred Charges And Other Assets Sum of the carrying amounts as of the balance sheet date of all assets, excluding Property, Plant, and Equipment and Other Property and Investments, that are expected to be realized in cash, sold or consumed after one year or beyond the normal operating cycle, if longer. Total deferred credits and other liabilities Total Deferred Credits And Other Liabilities Total obligations, excluding Long-term Debt, incurred as part of normal operations that is expected to be repaid beyond the following twelve months or one business cycle. Total deferred credits and other liabilities Earnings Before Income Taxes Income Loss From Continuing Operations Before Income Taxes And Minority Interest Sum of operating profit and nonoperating income (expense) before income taxes, extraordinary items, cumulative effects of changes in accounting principles, and noncontrolling interest. Deferred income taxes Deferred Income Tax Expense (Benefit), Total Deferred Income Tax Expense (Benefit) Accrued compensation Accrued Salaries, Current Total deferred charges and other assets Total other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Other comprehensive income Derivatives [Abstract] DERIVATIVES Derivative Instruments and Hedging Activities Disclosure [Text Block] Additional Paid In Capital Long-term debt payable to affiliated trusts, 2042 through 2044 Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust, Total Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust Less amount due within one year Preferred Stock Stockholders' Equity Attributable to Noncontrolling Interest, Total Stockholders' Equity Attributable to Noncontrolling Interest, Beginning Balance Stockholders' Equity Attributable to Noncontrolling Interest, Ending Balance Stockholders' Equity Attributable to Noncontrolling Interest Total redeemable preferred stock of subsidiaries, in Percent of Total Capitalization Temporary Equity Carrying Amount In Percent Of Total Capitalization As a percent of total capitalization, the carrying value (book value) of an entity's issued and outstanding stock which is not included within permanent equity in Stockholders Equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer. As a percent of total capitalization, the total of all Stockholders' Equity (deficit) items, net of receivables from officers, directors owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). Minority Interest In Percent Of Total Capitalization Total preferred and preference stock of subsidiaries, in Percent of Total Capitalization Less amount due within one year Long-term debt excluding amount due within one year, in Percent of Total Capitalization Long Term Debt And Capital Lease Obligations In Percent Of Total Capitalization As a percent of total capitalization, the sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year or the normal operating cycle, if longer plus capital lease obligations due to be paid more than one year after the balance sheet date. Preferred and Preference Stock of Subsidiaries Redeemable Preferred Stock of Subsidiaries Interest Rates Debt Instrument, Interest Rate, Stated Percentage 2044 Maturity Of Long Term Debt In Future Period One Member. 2042 Maturity Of Long Term Debt In Future Period Two Member. 2016 through 2048 Maturity Of Pollution Control Bonds Period One Member. 2011 through 2049 Maturity Of Pollution Control Bonds Period Two Member. Long-term Pollution Control Bond, Total Long-term Pollution Control Bond Represents the interest expected to be incurred during the next twelve months on long-term debt. Annualized Interest Long Term Debt Annual interest requirement Preferred Stock Dividend Rate Stated Percentage Rate Range Minimum. Preferred Stock Dividend Rate Stated Percentage Rate Range Minimum Dividend Rate, Minimum Preferred Stock Dividend Rate Stated Percentage Rate Range Maximum. Preferred Stock Dividend Rate Stated Percentage Rate Range Maximum Dividend Rate, Maximum JOINT OWNERSHIP AGREEMENTS Schedule of Jointly Owned Utility Plants [Text Block] FINANCING Debt Disclosure [Text Block] Disclosures related to common stock issued, common stock reserved, non-qualified stock option plans, diluted earnings per share, and common stock dividend restrictions. Common Stock Text Block COMMON STOCK Long Term Debt Maturities Repayments Of Principal In Last Twelve Months Amount of long-term debt matured in the past twelve months following the date of the latest balance sheet presented in the financial statements, which may include maturities of longterm debt, sinking fund requirements, and other securities redeemable at fixed or detereminable prices and dates. 2009 Investment tax credits Cash dividends Other Annual dividend requirement Annual Dividend Preferred And Preference Stock Represents the dividend expected to be paid during the next twelve months to preferred and/or preference stockholders. Investment Type [Axis] Investment Type [Domain] Securities Investment [Member] Fixed Income Investments [Member] Preference stock Preference stock