2.2.0.7 true Debt and Credit Facilities (Details) (USD $) 40504 - Disclosure - Debt and Credit Facilities (Details) true false In Millions, unless otherwise specified false false 1 USD false false Unit13 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Unit12 Standard http://www.xbrl.org/2003/instance pure xbrli 0 $ false 2 USD false false Unit13 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Unit12 Standard http://www.xbrl.org/2003/instance pure xbrli 0 Unit14 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Unit1 Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ false 3 USD false false Unit13 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 4 USD true false false false Unsecured Brazilian Debt [Member] us-gaap_DebtInstrumentAxis xbrldi http://xbrl.org/2006/xbrldi duk_UnsecuredBrazilianDebtMember us-gaap_DebtInstrumentAxis explicitMember Unit13 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Unit12 Standard http://www.xbrl.org/2003/instance pure xbrli 0 $ false 5 true false false false Non-Recourse Long-Term Loan Agreement of VIEs [Member] us-gaap_DebtInstrumentAxis xbrldi http://xbrl.org/2006/xbrldi duk_NonRecourseLongTermLoanAgreementOfViesMember us-gaap_DebtInstrumentAxis explicitMember false 6 true false false false Non-Recourse Long-Term Loan Agreement of VIEs [Member] us-gaap_DebtInstrumentAxis xbrldi http://xbrl.org/2006/xbrldi duk_NonRecourseLongTermLoanAgreementOfViesMember us-gaap_DebtInstrumentAxis explicitMember Unit12 Standard http://www.xbrl.org/2003/instance pure xbrli 0 false 7 USD true false false false Non-Recourse Long-Term Loan Agreement of VIEs [Member] us-gaap_DebtInstrumentAxis xbrldi http://xbrl.org/2006/xbrldi duk_NonRecourseLongTermLoanAgreementOfViesMember us-gaap_DebtInstrumentAxis explicitMember Unit13 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Unit12 Standard http://www.xbrl.org/2003/instance pure xbrli 0 $ false 8 USD true false false false Duke Energy Master Credit Facility expiring in June 2012 [Member] us-gaap_DebtInstrumentAxis xbrldi http://xbrl.org/2006/xbrldi duk_DukeEnergyMasterCreditFacilityExpiringInJune2012Member us-gaap_DebtInstrumentAxis explicitMember Unit13 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 9 USD true false false false Duke Energy [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi duk_DukeEnergyMember dei_LegalEntityAxis explicitMember Unit13 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ 5 Debt Instrument, Face Amount 3 us-gaap_DebtInstrumentFaceAmount us-gaap true credit instant No definition available. false false false false false false false false false false false false 1 true true false false 450000000 450 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 true true false false 281000000 281 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 true true false false 325000000 325 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false xbrli:monetaryItemType monetary The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 false 7 Loan Interest Fixed Rate Applicable Margin 3 duk_LoanInterestFixedRateApplicableMargin duk false na instant Loan Interest Fixed Rate Applicable Margin false false false false false false false false false false false label false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false true false false 2.5 2.5 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false xbrli:decimalItemType decimal Loan Interest Fixed Rate Applicable Margin No authoritative reference available. false 8 Debt Instrument, Maturity Date 3 us-gaap_DebtInstrumentMaturityDate us-gaap true na duration No definition available. false false false false false false false false false false false false 1 false false false false 0 0 2015-04-01 2015-04-01 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 2015-07-01 2015-07-01 true false false 5 false false false false 0 0 2025-05-01 2025-05-01 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false xbrli:dateItemType date Date when the debt instrument is scheduled to be fully repaid, which may be presented in a variety of ways (year, month and year, day, month and year, quarter, etc.). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 false 9 Repayments of Long-term Lines of Credit 3 us-gaap_RepaymentsOfLongTermLinesOfCredit us-gaap true credit duration No definition available. false false false false false false false false false false false false 1 false true false false 274000000 274 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false xbrli:monetaryItemType monetary The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph b false 10 Non recourse Notes Payable Of Variable Interest Entities Current 3 duk_NonRecourseNotesPayableOfVariableInterestEntitiesCurrent duk false debit instant Non recourse Notes Payable Of Variable Interest Entities Current false false false false false false false false false false false label false 1 false false false false 0 0 false false false 2 false true false false 287000000 287 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false xbrli:monetaryItemType monetary Non recourse Notes Payable Of Variable Interest Entities Current No authoritative reference available. false 11 Maximum Borrowing Capacity 3 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity us-gaap true credit instant No definition available. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false true false false 3137000000 3137 [1],[2],[3] false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false true false false 3140000000 3140 true false false 9 false true false false 1097000000 1097 [1],[2],[3] true false false xbrli:monetaryItemType monetary Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 false 12 Credit Facility Debt Covenant for Maximum Debt-to-Total Capitalization Ratio Percentage for Each Borrower 3 duk_MaximumDebtCovenantRatioOfDebtToTotalCapitalizationRatioPercentageForEachBorrower duk false na instant Maximum Debt Covenant Ratio Of Debt To Total Capitalization Ratio Percentage For Each Borrower false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false true false false 0.65 0.65 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false us-types:percentItemType pure Maximum Debt Covenant Ratio Of Debt To Total Capitalization Ratio Percentage For Each Borrower No authoritative reference available. false 14 Notes Payable And Commercial Paper 3 duk_NotesPayableAndCommercialPaper duk false debit instant Notes Payable And Commercial Paper false false false false false false false false false false true negated false 1 false false false false 0 0 false false false 2 false true false false -450000000 -450 [1],[2],[3] false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false xbrli:monetaryItemType monetary Notes Payable And Commercial Paper No authoritative reference available. false 15 Outstanding Letters Of Credit 3 duk_OutstandingLettersOfCredit duk false debit instant Outstanding Letters Of Credit false false false false false false false false false false true negated false 1 false false false false 0 0 false false false 2 false true false false -31000000 -31 [1],[2],[3] false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false true false false -24000000 -24 [1],[2],[3] true false false xbrli:monetaryItemType monetary Outstanding Letters Of Credit No authoritative reference available. false 16 Tax Exempt Bonds 3 duk_TaxExemptBonds duk false debit instant Tax Exempt Bonds false false false false false false false false false false true negated false 1 false false false false 0 0 false false false 2 false true false false -285000000 -285 [1],[2],[3] false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false true false false -25000000 -25 [1],[2],[3] true false false xbrli:monetaryItemType monetary Tax Exempt Bonds No authoritative reference available. false 17 Available Capacity 3 us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity us-gaap true credit instant No definition available. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false true false false 2371000000 2371 [1],[2],[3] false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false true false false 1048000000 1048 [1],[2],[3] true false false xbrli:monetaryItemType monetary Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 false 18 Credit Facility 3 us-gaap_UnsecuredDebt us-gaap true credit instant No definition available. false false false false false false false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 200000000 200 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false xbrli:monetaryItemType monetary Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Article 5 -Subsection 19, 20, 22 false 19 Borrowing Sub Limit On Revolving Credit Facility 3 duk_BorrowingSubLimitOnCreditFacility duk false debit instant Borrowing Sub Limit On Credit Facility false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 100000000 100 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false xbrli:monetaryItemType monetary Borrowing Sub Limit On Credit Facility No authoritative reference available. false 20 Initial Borrowing For General Corporate Purpose 3 duk_InitialBorrowingForGeneralCorporatePurpose duk false debit instant Initial Borrowing For General Corporate Purpose false false false false false false false false false false false label false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 true true false false 75000000 75 false false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false xbrli:monetaryItemType monetary Initial Borrowing For General Corporate Purpose No authoritative reference available. false 1 Credit facility contains a covenant requiring the debt-to-total capitalization ratio to not exceed 65% for each borrower. 2 Represents the sub limit of each borrower at September 30, 2010. The Duke Energy Ohio sub limit is comprised of $650 million for Duke Energy Ohio and $100 million for Duke Energy Kentucky. 3 This summary only includes Duke Energy's master credit facility and, accordingly, excludes certain demand facilities and committed facilities that are insignificant in size or which generally support very specific requirements, which primarily include facilities that backstop various outstanding tax-exempt bonds. These facilities that backstop various outstanding tax-exempt bonds generally have non-cancelable terms in excess of one year from the balance sheet date, such that the Duke Energy Registrants have the ability to refinance such borrowings on a long-term basis. Accordingly, such borrowings are reflected as Long-term Debt on the Condensed Consolidated Balance Sheets of the respective Duke Energy Registrant. 9 15 false Millions UnKnown UnKnown true true