v2.4.0.6

Debt And Credit Facilities (Summary Of Debt Issuances) (Details) (USD $)
In Millions, unless otherwise specified

3 Months Ended

Mar. 31, 2013

Mar. 31, 2012

Debt Instrument [Line Items]

Total Issuances

$ 1,653

Payments for the redemption of long-term debt

747

821

Unsecured Debt [Member] | January 2013 [Member] | January 2073 [Member]

Debt Instrument [Line Items]

Unsecured debt issuances

500

^[1]

Interest Rate

5.125%

Debt instrument, call date, earliest

Jan. 01, 2018

Secured Debt [Member] | June 2013 [Member]

Debt Instrument [Line Items]

Interest Rate

1.009%

Secured Debt [Member] | April 2013 [Member] | April 2026 [Member]

Debt Instrument [Line Items]

Secured debt issuances

230

^[2]

Interest Rate

5.456%

Percentage of debt hedged by interest rate derivatives

75.00%

Incremental debt proceeds

40

Secured Debt [Member] | February 2013 [Member] | June 2037 [Member]

Debt Instrument [Line Items]

Secured debt issuances

220

^[3]

Interest Rate

4.74%

Secured Debt [Member] | February 2013 [Member] | December 2030 [Member]

Debt Instrument [Line Items]

Secured debt issuances

203

^[3],[4]

Interest Rate

2.043%

Percentage of debt hedged by interest rate derivatives

95.00%

Secured Debt [Member] | Bridge Loan [Member] | June 2013 [Member]

Debt Instrument [Line Items]

Payments for the redemption of long-term debt

190

First Mortgage Bonds [Member] | March 2013 [Member] | March 2043 [Member]

Debt Instrument [Line Items]

First mortgage bonds issuances

500

^[5]

Interest Rate

4.10%

Duke Energy Carolinas [Member]

Debt Instrument [Line Items]

Payments for the redemption of long-term debt

0

751

Progress Energy [Member]

Debt Instrument [Line Items]

Payments for the redemption of long-term debt

736

1

Progress Energy [Member] | Corporate Debt Securities [Member]

Debt Instrument [Line Items]

Interest Rate

7.10%

Payments for the redemption of long-term debt

300

Duke Energy Progress [Member]

Debt Instrument [Line Items]

Total Issuances

500

Payments for the redemption of long-term debt

1

0

Duke Energy Progress [Member] | First Mortgage Bonds [Member] | March 2013 [Member] | March 2043 [Member]

Debt Instrument [Line Items]

First mortgage bonds issuances

500

^[5]

Interest Rate

4.10%

Duke Energy Florida [Member]

Debt Instrument [Line Items]

Payments for the redemption of long-term debt

426

1

Duke Energy Ohio [Member]

Debt Instrument [Line Items]

Payments for the redemption of long-term debt

2

2

Duke Energy Ohio [Member] | First Mortgage Bonds [Member] | June 2013 [Member]

Debt Instrument [Line Items]

Interest Rate

2.10%

Duke Energy Indiana [Member]

Debt Instrument [Line Items]

Payments for the redemption of long-term debt

1

1

Parent Company [Member]

Debt Instrument [Line Items]

Total Issuances

500

Parent Company [Member] | Unsecured Debt [Member] | June 2013 [Member]

Debt Instrument [Line Items]

Interest Rate

5.65%

Parent Company [Member] | Unsecured Debt [Member] | January 2013 [Member] | January 2073 [Member]

Debt Instrument [Line Items]

Unsecured debt issuances

$ 500

^[1]

Interest Rate

5.125%

Debt instrument, call date, earliest

Jan. 01, 2018

[1]	Callable after January 2018 at par. Proceeds from the issuance were used to redeem the $300 million 7.10% Cumulative Quarterly Income Preferred Securities (QUIPS). The securities were redeemed at par plus accrued and unpaid distributions, payable upon presentation on the redemption date. The remaining net proceeds were used to repay a portion of our commercial paper and for general corporate purposes. See Note 11 for additional information about the QUIPS.
[2]	Represents primarily the conversion of a $190 million bridge loan issued in conjunction with the acquisition of Ibener in December 2012. Duke Energy received incremental proceeds of $40 million upon conversion of the bridge loan. The debt is floating rate and is denominated in U.S. dollars. Duke Energy has entered into a pay fixed-receive floating interest rate swap for 75 percent of the loan.
[3]	Represents the conversion of construction loans related to a renewable energy project issued in December 2012 to term loans. No cash proceeds were received in conjunction with the conversion. The term loans have varying maturity dates. The maturity date presented represents the latest date for all components of the respective loans.
[4]	The debt is floating rate. Duke Energy has entered into a pay fixed-receive floating interest rate swap for 95 percent of the loans.
[5]	Proceeds from the issuance were used to repay notes payable to affiliated companies as well as for general corporate purposes.

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Sum of the debt issuances during the reported period at face value.

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Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer) issued during the reported period. Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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Including the current and noncurrent portions issued during the reported period, 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).

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Earliest date before maturity when the issuer can call the outstanding debt instrument for repayment or conversion to equity, in CCYY-MM-DD format.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 470

-Section 50

-Paragraph 3

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The cash inflow from amounts received from issuance of long-term debt that is wholly or partially secured by collateral. Excludes proceeds from tax exempt secured debt.

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-Paragraph 19

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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