Electricity Energy Gigawatt Hours No authoritative reference available. Sum of operating profit and nonoperating income (expense) from continuing operations before 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. Variable Interest Entity Carrying Amount Of Collateralized Shareholder's Equity Unconsolidated Vie Shareholder's Equity, Net No authoritative reference available. Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are not expected to be recovered through revenue sources within one year or the normal operating cycle if longer. 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 Entity Carrying Amount Of Collateralized Assets Unconsolidated Vie Intangible Assets Net Excluding Goodwill 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. Purchase of emission allowances No authoritative reference available. Variable Interest Entity Carrying Amount Of Collateralized Assets Investments And Other Assets No authoritative reference available. No authoritative reference available. No authoritative reference available. Pre Tax 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. Impairment of goodwill and other impairment charges No authoritative reference available. No authoritative reference available. No authoritative reference available. Amount of unrecognized liability which if recognized would be recorded as component of discontinued operations 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. Sum of the carrying values as of the balance sheet date of the portions .of long-term notes payable due within one year or the operating cycle if longer attributed to variable interest entities 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. Initial Borrowing For General Corporate Purpose No authoritative reference available. Recovery of costs, requested No authoritative reference available. No authoritative reference available. No authoritative reference available. Total Gains Losses Included On Balance Sheet As Regulatory Asset Or Liability Or As Non Current 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. No authoritative reference available. No authoritative reference available. Long Term Loan Agreement Wind Farms No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Effect on fair value assumption 20% 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. Goodwill Accumulated Impairment Charges No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule Of Aggregation Of Variable Interest Entity Disclosures [TextBlock] No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Comprehensive Income And Other Income No authoritative reference available. No authoritative reference available. No authoritative reference available. Ownership Interest Price Agreement 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. Reductions To Remaining Severance Costs No authoritative reference available. No authoritative reference available. No authoritative reference available. Federal Advanced Clean Coal TaxCredits No authoritative reference available. Additional Penalty Electric Transmission No authoritative reference available. No authoritative reference available. No authoritative reference available. Non recourse Notes Payable Of Variable Interest Entities Current No authoritative reference available. Natural Gas Millions Of Decatherms No authoritative reference available. Storm Restoration Cost No authoritative reference available. No authoritative reference available. No authoritative reference available. Variable Interest Entity Carrying Amount Of Collateralized Assets Unconsolidated Vie Receivables Net Current 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. Tax On Unrealized Gain Loss On Auction Rate Securities Arising During 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. Approved Request of Retail Jurisdiction Storm Expense No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Aggregate carrying amount, as of the balance sheet date, of noncurrent assets of variable interest entities. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer). 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 Entity Carrying Amount Of Collateralized Assets Other Assets Current No authoritative reference available. No authoritative reference available. No authoritative reference available. Transaction price for DukeNet enterprises No authoritative reference available. No authoritative reference available. No authoritative reference available. Cost of natural gas sold during the reporting period, operations of which is regulated by a federal or state agency, and cost of coal sold during the reporting period. No authoritative reference available. No authoritative reference available. No authoritative reference available. Annual increase in rates for electric delivery service approved by PUCO No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting, owned by nonaffiliate entity No authoritative reference available. No authoritative reference available. No authoritative reference available. Total amount reserved for legal proceedings and exposures No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Restricted Receivables Of VIEs Retained Interest 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. Coal Millions Of Tons 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. Restricted Receivables Of Variable Interest Entities Net 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 Amortization Pertaining To Qualified Pension Plan No authoritative reference available. No authoritative reference available. No authoritative reference available. Investments in auction rate securities sold 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. Location And Amount Of Pretax Gains And Losses Recognized In Income Or As Regulatory Assets Or Liabilities [TextBlock] No authoritative reference available. The net change in the beginning and end of period Other Current Liabilities balances not separately disclosed in the cash flow statement due to materiality considerations. No authoritative reference available. Adjustments To Remaining Severance Costs No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule Of Organization Consolidation And Presentation Of Financial Statements Disclosure [TextBlock] 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. Loan Interest Fixed Rate Applicable Margin 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 income, comprehensive No authoritative reference available. Total pre-tax amounts included in the statement of operations related to Level 3 No authoritative reference available. Cost to Install Synthetic Caps and Liners No authoritative reference available. No authoritative reference available. No authoritative reference available. Unrealized gains and an insignificant amount of unrealized losses No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Notes Payable And Commercial Paper No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Variable Interest Entity Carrying Amount Of Liabilities Consolidated Vie Nonrecourse Notes 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. Estimated Construction Cost No authoritative reference available. Deferred Debt Expense No authoritative reference available. Net assets fair value No authoritative reference available. Outstanding Letters Of Credit No authoritative reference available. No authoritative reference available. No authoritative reference available. Discount rate calculation premium over LIBOR. No authoritative reference available. Notes Payable To Affiliate Net 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. Total unbilled revenues classified within Restricted Receivables of Variable Interest Entities and Receivables on the Condensed Consolidated Balance Sheets. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The total amount of depreciation and amortization for reportable segments. 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. Estimated Cost No authoritative reference available. No authoritative reference available. No authoritative reference available. Borrowing limitation. 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. Emission Allowances NO2 Thousands Of Tons 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 value in DukeNet enterprise 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. Aggregate Estimated Voluntary Severance Program Costs No authoritative reference available. Unbilled Revenues Within Restricted Receivables Of Variable Interest Entities And Receivables No authoritative reference available. Segment Reporting Segment Revenue Unaffiliated No authoritative reference available. No authoritative reference available. No authoritative reference available. he net cash inflow (outflow) from money previously advanced to an entity that is related to it but not strictly controlled No authoritative reference available. Unrealized Losses Of Available For Sale Debt And Equity Securities Continuous Loss Position [TextBlock] 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 amount of total gains or losses for the period included in earnings that are attributable to the change in unrealized gains or losses relating to those assets and liabilities still held at the reporting date No authoritative reference available. Total estimated cost associated with voluntary severance program and office consolidation. 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 Entity Carrying Amount Of Collateralized Assets Receivables Net Current 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 Entity Carrying Amount Of Collateralized Liabilities Unconsolidated Vie Deferred Credits and Other Liabilities No authoritative reference available. Maximum Debt Covenant Ratio Of Debt To Total Capitalization Ratio Percentage For Each Borrower No authoritative reference available. Electric Transmission Charges No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Other comprehensive income other. 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 Entity Carrying Amount Of Collateralized Liabilities Unconsolidated Vie Other Current Liabilities No authoritative reference available. Variable Interest Entity Carrying Amount Of Liabilities Consolidated Vie Total Deferred Credits And Other Liabilities No authoritative reference available. Sum of the carrying amounts as of the balance sheet date of all investments and other assets that are expected to be realized in cash, sold, or consumed at a future date that exceeds one year from the balance sheet date. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. 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. Pre Tax Employer Contributions To Employee Savings Plan No authoritative reference available. Total obligations incurred as part of normal operations that are expected to be paid or otherwise settled after one year from the balance sheet date. No authoritative reference available. No authoritative reference available. No authoritative reference available. Reserve related to remediation work No authoritative reference available. Effect on fair value assumption 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. Sum of the carrying values as of the balance sheet date of all non-recourse long-term debt of variable interest entities, 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 (current maturities) or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any. 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. Total fair value valuation No authoritative reference available. No authoritative reference available. No authoritative reference available. Other Current Liabilities . No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule Of Gain Loss Recognized In Accumulated Other Comprehensive Income For Derivatives Instruments [TextBlock] No authoritative reference available. Variable Interest Entity carrying amount of collateralized liabilities unconsolidated VIE total liabilities. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Variable Interest Entity Carrying Amount Of Collateralized Assets Unconsolidated Vie Investments In Affiliates Subsidiaries Associates And Joint Ventures No authoritative reference available. Additional fair value disclosures No authoritative reference available. No authoritative reference available. No authoritative reference available. Asset Amortization Pertaining To Other Post Retirement Benefit Plans 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. Schedule of excise taxes [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. Debt and Credit Facilities [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. Accumulated Depreciation and Amortization of VIE's No authoritative reference available. No authoritative reference available. No authoritative reference available. Variable Interest Entity Carrying Amount Of Liabilities Consolidated Vie Long Term Debt Current No authoritative reference available. Pre-tax net losses on derivatives related to cash flow hedges remains in AOCI 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 Entity Carrying Amount Of Liabilities Consolidated Vie Nonrecourse Long Term Debt No authoritative reference available. No authoritative reference available. No authoritative reference available. Long-term debt, including current maturities No authoritative reference available. Sale of emission allowances No authoritative reference available. Losses expected to be recognized in earning for cash flow hedges in AOCI No authoritative reference available. Electricity-Capacity (Gigawatt-hours) No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Acceleration Rate No authoritative reference available. No authoritative reference available. No authoritative reference available. Goodwill before accumulated impairment charges No authoritative reference available. No authoritative reference available. No authoritative reference available. Carrying amount at the balance sheet date for long-lived physical assets used in the normal conduct of business and not intended for resale attributed to variable interest entities. This can include land, physical structures, machinery, vehicles, furniture, computer equipment, construction in progress, and similar items. Amount does not include depreciation. 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. No authoritative reference available. No authoritative reference available. Unrealized gain (loss) on investments in auction rate securities No authoritative reference available. Estimated project cost financed by joint venture partner No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Amount of an item in the reconciliation of total depreciation and amortization from reportable segments, to the entity's consolidated depreciation and amortization No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Proceeds Received For Sale Of Receivables Portion Received As Note Payable No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Deferred tax assets, write off 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. Sum of the carrying amounts as of the balance sheet date of all regulatory assets and other deferred credits that are expected to be recovered through revenue sources (or the normal operating cycle, if longer). 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. Total member's equity No authoritative reference available. Increase in annual base natural gas rates approved by KPSC No authoritative reference available. Effective Tax Rates No authoritative reference available. Total intersegment revenue for reportable segments No authoritative reference available. No authoritative reference available. No authoritative reference available. Other income and expense, net No authoritative reference available. Estimated Allowance For Funds Used During Construction No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Storm Damages No authoritative reference available. No authoritative reference available. No authoritative reference available. Emission Allowances SO2 Thousands Of Tons No authoritative reference available. The total amount due to the entity, attributed to variable interest entities, within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value. No authoritative reference available. Aggregate Fair Value Amounts Of Derivative Instruments In A Net Liability Position 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. Pre-Tax Impairment Charges No authoritative reference available. Other Costs Related To Qualified Pension Plans 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. Subordinated Retained Interest Limitation Of The Total Proceeds No authoritative reference available. No authoritative reference available. No authoritative reference available. Fuel used in electric generation and purchased power non-regulated, fair value No authoritative reference available. DEIGP Electric Transmission Charges Promulgated By ANEEL 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. Adjustment on the fair value of derivatives and commodity contracts resulting from changes in market prices from the time contracts are entered to the time of the reporting period. No authoritative reference available. Debt Associated With The Consolidation Of Subsidiary 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. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The net change in the beginning and end of period Other Current Assets balances not separately disclosed in the cash flow statement due to materiality considerations. No authoritative reference available. Increase In Estimated Cost No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Liabilities and member's equity No authoritative reference available. Receivables To Maintain Minimum equity Balance No authoritative reference available. No authoritative reference available. No authoritative reference available. Tax Exempt Bonds No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Member's Equity No authoritative reference available. Estimated project cost financed by registrant No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Borrowing Sub Limit On Credit Facility No authoritative reference available. 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. Examples include buildings, production equipment and customer lists. 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 amount of total gains or losses for the period included in earnings that are attributable to the change in unrealized gains or losses relating to those assets and liabilities still held at the reporting date No authoritative reference available. No authoritative reference available. No authoritative reference available. Additional Capital Cost No authoritative reference available. Estimated Loss In Change In Pension Plan No authoritative reference available. No authoritative reference available. No authoritative reference available. Undesignated Hedges Pre Tax Gain Loss Recognized As Regulatory Assets No authoritative reference available. No authoritative reference available. No authoritative reference available. Property, Plant and Equipment Cost, VIE's No authoritative reference available. Probable Insurance Recoveries No authoritative reference available. Total of reconciling items between total reportable segments' unaffiliated revenues and consolidated entity unaffiliated revenues. 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. Estimated Cost Approved No authoritative reference available. No authoritative reference available. No authoritative reference available. Secured Credit Facility Of Vie No authoritative reference available.