v2.4.0.6

Risk Management, Derivative Instruments And Hedging Activities (Tables) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2013 | Dec. 31, 2012
Derivative [Line Items] |  |
Notional Amounts Of Derivative Instruments Related To Interest Rate Risk |
|  |  | March 31, 2013
(in millions) |  | Duke Energy |  | Progress Energy |  | Duke Energy Progress |  | Duke Energy Ohio |  | Duke Energy Indiana
Cash flow hedges(a) |  | $ | 1,047 |  | $ | ― |  | $ | ― |  | $ | ― |  | $ | ―
Undesignated contracts |  |  | 238 |  |  | ― |  |  | ― |  |  | 27 |  |  | 200
Fair value hedges |  |  | 250 |  |  | ― |  |  | ― |  |  | 250 |  |  | ―
| Total notional amount |  | $ | 1,535 |  | $ | ― |  | $ | ― |  | $ | 277 |  | $ | 200
|  |  | December 31, 2012
(in millions) |  | Duke Energy |  | Progress Energy |  | Duke Energy Progress |  | Duke Energy Ohio |  | Duke Energy Indiana
Cash flow hedges(a) |  | $ | 1,047 |  | $ | ― |  | $ | ― |  | $ | ― |  | $ | ―
Undesignated contracts |  |  | 290 |  |  | 50 |  |  | 50 |  |  | 27 |  |  | 200
Fair value hedges |  |  | 250 |  |  | ― |  |  | ― |  |  | 250 |  |  | ―
| Total notional amount |  | $ | 1,587 |  | $ | 50 |  | $ | 50 |  | $ | 277 |  | $ | 200
Underlying Notional Amounts for Commodity Derivative Instruments Accounted for at Fair Value |
|  | March 31, 2013
|  | Duke Energy |  | Duke Energy Carolinas |  | Progress Energy |  | Duke Energy Progress |  | Duke Energy Florida |  | Duke Energy Ohio |  | Duke Energy Indiana
Commodity contracts |  |  |  |  |  |  |  |  |  |  |  |  |
Electricity-energy (Gigawatt-hours)(a) | 56,890 |  | 1,802 |  | 1,850 |  | 1,850 |  | ― |  | 53,173 |  | 406
Natural gas (millions of decatherms) | 516 |  | ― |  | 335 |  | 110 |  | 225 |  | 181 |  | ―
|  | December, 31, 2012
|  | Duke Energy |  | Duke Energy Carolinas |  | Progress Energy |  | Duke Energy Progress |  | Duke Energy Florida |  | Duke Energy Ohio |  | Duke Energy Indiana
Commodity contracts |  |  |  |  |  |  |  |  |  |  |  |  |
Electricity-energy (Gigawatt-hours)(a) | 52,104 |  | 2,028 |  | 1,850 |  | 1,850 |  | ― |  | 51,215 |  | 97
Natural gas (millions of decatherms) | 528 |  | ― |  | 348 |  | 118 |  | 230 |  | 180 |  | ―
Location And Fair Value Amounts Of Derivatives Reflected In The Condensed Consolidated Balance Sheets |
|  | March 31, 2013 |  |  | December 31, 2012
(in millions) | Asset |  | Liability |  |  | Asset |  | Liability
Derivatives Designated as Hedging Instruments |  |  |  |  |  |  |  |  |  |  |  |
Commodity contracts |  |  |  |  |  |  |  |  |  |  |  |
Current liabilities: other | $ | ― |  | $ | 1 |  |  | $ | ― |  | $ | 2
Deferred credits and other liabilities: other |  | ― |  |  | 1 |  |  |  | ― |  |  | 1
Interest rate contracts |  |  |  |  |  |  |  |  |  |  |  |
Current assets: other |  | 2 |  |  | ― |  |  |  | 2 |  |  | ―
Investments and other assets: other |  | 3 |  |  | ― |  |  |  | 7 |  |  | ―
Current Liabilities: Other |  | (2) |  |  | 70 |  |  |  | ― |  |  | 81
Deferred credits and other liabilities: other |  | ― |  |  | 30 |  |  |  | ― |  |  | 35
Total Derivatives Designated as Hedging Instruments | $ | 3 |  | $ | 102 |  |  | $ | 9 |  | $ | 119
Derivatives Not Designated as Hedging Instruments |  |  |  |  |  |  |  |  |  |  |  |
Commodity contracts |  |  |  |  |  |  |  |  |  |  |  |
Current assets: other | $ | 52 |  | $ | 9 |  |  | $ | 41 |  | $ | 2
Investments and other assets: other |  | 32 |  |  | 6 |  |  |  | 106 |  |  | 50
Current liabilities: other |  | 151 |  |  | 372 |  |  |  | 106 |  |  | 407
Deferred credits and other liabilities: other |  | 71 |  |  | 293 |  |  |  | 2 |  |  | 255
Interest rate contracts |  |  |  |  |  |  |  |  |  |  |  |
Current liabilities: other |  | ― |  |  | 57 |  |  |  | ― |  |  | 76
Deferred credits and other liabilities: other |  | ― |  |  | 6 |  |  |  | ― |  |  | 8
Total Derivatives Not Designated as Hedging Instruments | $ | 306 |  | $ | 743 |  |  | $ | 255 |  | $ | 798
Total Derivatives | $ | 309 |  | $ | 845 |  |  | $ | 264 |  | $ | 917
Offsetting Assets and Liabilities |
|  |  | March 31, 2013
(in millions) |  | Gross amounts recognized |  | Gross amounts offset |  | Net amounts included on the Condensed Consolidated Balance Sheet |
Derivative Assets: Current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  | $ | 182 |  | $ | 157 |  | $ | 25 |
Not Subject to Master Netting |  |  | 21 |  |  | ― |  |  | 21 |
Total Derivative Assets: Current |  |  | 203 |  |  | 157 |  |  | 46 | (a)
Derivative Assets: Non-current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 91 |  |  | 75 |  |  | 16 |
Not Subject to Master Netting |  |  | 15 |  |  | ― |  |  | 15 |
Total Derivative Assets: Non-current |  |  | 106 |  |  | 75 |  |  | 31 | (b)
Derivative Liabilities: Current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 350 |  |  | 222 |  |  | 128 |
Not Subject to Master Netting |  |  | 159 |  |  | ― |  |  | 159 |
Total Derivative Liabilities: Current |  |  | 509 |  |  | 222 |  |  | 287 | (c)
Derivative Liabilities: Non-current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 295 |  |  | 118 |  |  | 177 |
Not Subject to Master Netting |  |  | 41 |  |  | ― |  |  | 41 |
Total Derivative Liabilities: Non-current |  |  | 336 |  |  | 118 |  |  | 218 | (d)
|  |  | December 31, 2012
(in millions) |  | Gross amounts recognized |  | Gross amounts offset |  | Net amounts included on the Condensed Consolidated Balance Sheet |
Derivative Assets: Current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  | $ | 127 |  | $ | 114 |  | $ | 13 |
Not Subject to Master Netting |  |  | 22 |  |  | ― |  |  | 22 |
Total Derivative Assets: Current |  |  | 149 |  |  | 114 |  |  | 35 | (a)
Derivative Assets: Non-current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 96 |  |  | 54 |  |  | 42 |
Not Subject to Master Netting |  |  | 19 |  |  | ― |  |  | 19 |
Total Derivative Assets: Non-current |  |  | 115 |  |  | 54 |  |  | 61 | (b)
Derivative Liabilities: Current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 402 |  |  | 151 |  |  | 251 |
Not Subject to Master Netting |  |  | 166 |  |  | ― |  |  | 166 |
Total Derivative Liabilities: Current |  |  | 568 |  |  | 151 |  |  | 417 | (c)
Derivative Liabilities: Non-current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 295 |  |  | 90 |  |  | 205 |
Not Subject to Master Netting |  |  | 54 |  |  | ― |  |  | 54 |
Total Derivative Liabilities: Non-current |  |  | 349 |  |  | 90 |  |  | 259 | (d)
Cash Flow Hedges-Location And Amount Of Pre-Tax (Losses) Recognized In Comprehensive Income |
|  | Three Months Ended March 31,
(in millions) | 2013 |  | 2012
Pre-tax Gains (Losses) Recorded in AOCI |  |  |  |  |
Interest rate contracts | $ | 13 |  | $ | 18
Commodity contracts |  | 1 |  |  | ―
Total Pre-tax Gains (Losses) Recorded in AOCI | $ | 14 |  | $ | 18
Location of Pre-tax Gains and (Losses) Reclassified from AOCI into Earnings(a) |  |  |  |  |
Interest rate contracts(b) |  |  |  |  |
Interest expense | $ | (1) |  | $ | (1)
Total Pre-tax Gains (Losses) Reclassified from AOCI into Earnings | $ | (1) |  | $ | (1)
(a) | Represents the gains and losses on cash flow hedges previously recorded in AOCI during the term of the hedging relationship and reclassified into earnings during the current period.
(b) | Amounts in AOCI related to terminated hedges are reclassified to earnings as the interest expense is recorded. The effective portion of the hedges will be amortized to interest expense over the term of the related debt.
Undesignated Contracts - Location And Amount Of Pre-Tax Gains And (Losses) Recognized In Income Or As Regulatory Assets Or Liabilities |
|  | Three Months Ended March 31,
(in millions) | 2013 |  | 2012
Location of Pre-tax Gains and (Losses) Recognized in Earnings |  |  |  |  |
Commodity contracts |  |  |  |  |
Revenue, regulated electric | $ | 6 |  | $ | ―
Revenue, nonregulated electric, natural gas and other |  | (82) |  |  | 36
Fuel used in electric generation and purchased power regulated |  | (52) |  |  | ―
Fuel used in electric generation and purchased power - nonregulated |  | (7) |  |  | ―
Interest rate contracts |  |  |  |  |
Interest expense |  | (4) |  |  | ―
Total Pre-tax (Losses) Gains Recognized in Earnings | $ | (139) |  | $ | 36
Location of Pre-tax Gains and (Losses) Recognized as Regulatory Assets or Liabilities |  |  |  |  |
Commodity contracts |  |  |  |  |
Regulatory asset | $ | 105 |  | $ | (1)
Regulatory liability |  | (5) |  |  | 5
Interest rate contracts |  |  |  |  |
Regulatory asset |  | 13 |  |  | 22
Total Pre-tax Gains (Losses) Recognized as Regulatory Assets of Liabilities | $ | 113 |  | $ | 26
Schedule Of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features |
|  |  | March 31, 2013
(in millions) |  | Duke Energy |  | Progress Energy |  | Duke Energy Progress |  | Duke Energy Florida |  | Duke Energy Ohio
Aggregate fair value amounts of derivative instruments in a net liability position |  | $ | 512 |  | $ | 230 |  | $ | 79 |  | $ | 151 |  | $ | 279
Collateral already posted |  |  | 215 |  |  | 35 |  |  | 3 |  |  | 32 |  |  | 180
Additional cash collateral or letters of credit in the event credit-risk-related contingent features were triggered at the end of the reporting period |  |  | 202 |  |  | 195 |  |  | 76 |  |  | 119 |  |  | 7
|  |  | December 31, 2012
(in millions) |  | Duke Energy |  | Progress Energy |  | Duke Energy Progress |  | Duke Energy Florida |  | Duke Energy Ohio
Aggregate fair value amounts of derivative instruments in a net liability position |  | $ | 466 |  | $ | 286 |  | $ | 108 |  | $ | 178 |  | $ | 176
Collateral already posted |  |  | 163 |  |  | 59 |  |  | 9 |  |  | 50 |  |  | 104
Additional cash collateral or letters of credit in the event credit-risk-related contingent features were triggered at the end of the reporting period |  |  | 230 |  |  | 227 |  |  | 99 |  |  | 128 |  |  | 2
Schedule Of Cash Collateral Under Master Netting Arrangements |
|  | March 31, 2013 |  | December 31, 2012
(in millions) | Receivables |  | Payables |  | Receivables |  | Payables
Duke Energy |  |  |  |  |  |  |  |  |  |  |
Amounts offset against net derivative positions | $ | 107 |  | $ | ― |  | $ | 73 |  | $ | ―
Amounts not offset against net derivative positions |  | 108 |  |  | ― |  |  | 93 |  |  | ―
Progress Energy |  |  |  |  |  |  |  |  |  |  |
Amounts offset against net derivative positions |  | 35 |  |  | ― |  |  | 58 |  |  | ―
Amounts not offset against net derivative positions |  | ― |  |  | ― |  |  | 1 |  |  | ―
Duke Energy Progress |  |  |  |  |  |  |  |  |  |  |
Amounts offset against net derivative positions |  | 3 |  |  | ― |  |  | 9 |  |  | ―
Amounts not offset against net derivative positions |  | ― |  |  | ― |  |  | ― |  |  | ―
Duke Energy Florida |  |  |  |  |  |  |  |  |  |  |
Amounts offset against net derivative positions |  | 32 |  |  | ― |  |  | 49 |  |  | ―
Amounts not offset against net derivative positions |  | ― |  |  | ― |  |  | 1 |  |  | ―
Duke Energy Ohio |  |  |  |  |  |  |  |  |  |  |
Amounts offset against net derivative positions |  | 72 |  |  | ― |  |  | 15 |  |  | ―
Amounts not offset against net derivative positions | $ | 108 |  | $ | ― |  | $ | 92 |  | $ | ―
Duke Energy Carolinas [Member] |  |
Derivative [Line Items] |  |
Location And Fair Value Amounts Of Derivatives Reflected In The Condensed Consolidated Balance Sheets |
|  | March 31, 2013 |  | December 31, 2012
(in millions) | Asset |  | Liability |  | Asset |  | Liability
Derivatives Not Designated as Hedging Instruments |  |  |  |  |  |  |  |  |  |  |
Commodity contracts |  |  |  |  |  |  |  |  |  |  |
Current liabilities: other | $ | ― |  | $ | 2 |  | $ | ― |  | $ | 6
Deferred credits and other liabilities: other |  | ― |  |  | 3 |  |  | ― |  |  | 6
Total Derivatives Not Designated as Hedging Instruments | $ | ― |  | $ | 5 |  | $ | ― |  | $ | 12
Total Derivatives | $ | ― |  | $ | 5 |  | $ | ― |  | $ | 12
Offsetting Assets and Liabilities |
|  |  | March 31, 2013
(in millions) |  | Gross amounts recognized |  | Gross amounts offset |  | Net amounts included on the Condensed Consolidated Balance Sheet |
Derivative Liabilities: Current |  |  |  |  |  |  |  |  |  |
Not Subject to Master Netting |  | $ | 2 |  | $ | ― |  | $ | 2 | (a)
Derivative Liabilities: Non-current |  |  |  |  |  |  |  |  |  |
Not Subject to Master Netting |  |  | 3 |  |  | ― |  |  | 3 | (b)
|  |  | December 31, 2012
(in millions) |  | Gross amounts recognized |  | Gross amounts offset |  | Net amounts included on the Condensed Consolidated Balance Sheet |
Derivative Liabilities: Current |  |  |  |  |  |  |  |  |  |
Not Subject to Master Netting |  | $ | 6 |  | $ | ― |  | $ | 6 | (a)
Derivative Liabilities: Non-current |  |  |  |  |  |  |  |  |  |
Not Subject to Master Netting |  |  | 6 |  |  | ― |  |  | 6 | (b)
Progress Energy [Member] |  |
Derivative [Line Items] |  |
Notional Amounts Of Derivative Instruments Related To Interest Rate Risk |  |
|  |  | December 31, 2012
(in millions) |  | Duke Energy |  | Progress Energy |  | Duke Energy Progress |  | Duke Energy Ohio |  | Duke Energy Indiana
Cash flow hedges(a) |  | $ | 1,047 |  | $ | ― |  | $ | ― |  | $ | ― |  | $ | ―
Undesignated contracts |  |  | 290 |  |  | 50 |  |  | 50 |  |  | 27 |  |  | 200
Fair value hedges |  |  | 250 |  |  | ― |  |  | ― |  |  | 250 |  |  | ―
| Total notional amount |  | $ | 1,587 |  | $ | 50 |  | $ | 50 |  | $ | 277 |  | $ | 200
Location And Fair Value Amounts Of Derivatives Reflected In The Condensed Consolidated Balance Sheets |
|  | March 31, 2013 |  | December 31, 2012
(in millions) | Asset |  | Liability |  | Asset |  | Liability
Derivatives Designated as Hedging Instruments |  |  |  |  |  |  |  |  |  |  |
Commodity contracts |  |  |  |  |  |  |  |  |  |  |
Current liabilities: other | $ | ― |  | $ | 1 |  | $ | ― |  | $ | 2
Deferred credits and other liabilities: other |  | ― |  |  | 1 |  |  | ― |  |  | 1
Total Derivatives Designated as Hedging Instruments | $ | ― |  | $ | 2 |  | $ | ― |  | $ | 3
Derivatives Not Designated as Hedging Instruments |  |  |  |  |  |  |  |  |  |  |
Commodity contracts |  |  |  |  |  |  |  |  |  |  |
Current assets: other | $ | 13 |  | $ | ― |  | $ | 3 |  | $ | ―
Investments and other assets: other |  | 2 |  |  | ― |  |  | 8 |  |  | ―
Current liabilities: other |  | 20 |  |  | 140 |  |  | ― |  |  | 231
Deferred credits and other liabilities: other |  | 12 |  |  | 159 |  |  | ― |  |  | 195
Interest rate contracts |  |  |  |  |  |  |  |  |  |  |
Current liabilities: other |  | ― |  |  | ― |  |  | ― |  |  | 11
Total Derivatives Not Designated as Hedging Instruments | $ | 47 |  | $ | 299 |  | $ | 11 |  | $ | 437
Total Derivatives | $ | 47 |  | $ | 301 |  | $ | 11 |  | $ | 440
Offsetting Assets and Liabilities |
|  |  | March 31, 2013
(in millions) |  | Gross amounts recognized |  | Gross amounts offset |  | Net amounts included on the Condensed Consolidated Balance Sheet |
Derivative Assets: Current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  | $ | 33 |  | $ | 21 |  | $ | 12 | (a)
Derivative Assets: Non-current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 14 |  |  | 12 |  |  | 2 | (b)
Derivative Liabilities: Current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 141 |  |  | 34 |  |  | 107 | (c)
Derivative Liabilities: Non-current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 156 |  |  | 34 |  |  | 122 |
Not Subject to Master Netting |  |  | 4 |  |  | ― |  |  | 4 |
Total Derivative Liabilities: Non-current |  |  | 160 |  |  | 34 |  |  | 126 | (d)
|  |  | December 31, 2012
(in millions) |  | Gross amounts recognized |  | Gross amounts offset |  | Net amounts included on the Condensed Consolidated Balance Sheet |
Derivative Assets: Current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  | $ | 3 |  | $ | ― |  | $ | 3 | (a)
Derivative Assets: Non-current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 8 |  |  | ― |  |  | 8 | (b)
Derivative Liabilities: Current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 244 |  |  | 22 |  |  | 222 | (c)
Derivative Liabilities: Non-current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 192 |  |  | 36 |  |  | 156 |
Not Subject to Master Netting |  |  | 4 |  |  | ― |  |  | 4 |
Total Derivative Liabilities: Non-current |  |  | 196 |  |  | 36 |  |  | 160 | (d)
Cash Flow Hedges-Location And Amount Of Pre-Tax (Losses) Recognized In Comprehensive Income |
|  | Three Months Ended March 31,
(in millions) | 2013 |  | 2012
Pre-tax Gains (Losses) Recorded in AOCI |  |  |  |  |
Commodity contracts | $ | 1 |  | $ | ―
Interest rate contracts |  | ― |  |  | 4
Total Pre-tax Gains (Losses) Recorded in AOCI | $ | 1 |  | $ | 4
Location of Pre-tax Gains and (Losses) Reclassified from AOCI into Earnings(a) |  |  |  |  |
Interest rate contracts(b) |  |  |  |  |
Interest expense | $ | ― |  | $ | (4)
Total Pre-tax Gains (Losses) Reclassified from AOCI into Earnings | $ | ― |  | $ | (4)
(a) | Represents the gains and losses on cash flow hedges previously recorded in AOCI during the term of the hedging relationships and reclassified into earnings during the current period.
(b) | Amounts in AOCI related to terminated hedges are reclassified to earnings as the interest expense is recorded. The effective portion of the hedges will be amortized to interest expense over the term of the related debt.
Undesignated Contracts - Location And Amount Of Pre-Tax Gains And (Losses) Recognized In Income Or As Regulatory Assets Or Liabilities |
|  | Three Months Ended March 31,
(in millions) | 2013 |  | 2012
Location of Pre-tax Gains and (Losses) Recognized in Earnings |  |  |  |  |
Commodity contracts |  |  |  |  |
Revenue, regulated electric | $ | 6 |  | $ | ―
Fuel used in electric generation and purchased power - regulated(a) |  | (52) |  |  | (105)
Other income and expenses, net |  | ― |  |  | 8
Interest rate contracts |  |  |  |  |
Interest expense |  | (4) |  |  | ―
Total Pre-tax (Losses) Gains Recognized in Earnings | $ | (50) |  | $ | (97)
Location of Pre-tax Gains and (Losses) Recognized as Regulatory Assets or Liabilities |  |  |  |  |
Commodity contracts(c) |  |  |  |  |
Regulatory asset | $ | 105 |  | $ | (206)
Interest rate contracts(b) |  |  |  |  |
Regulatory asset |  | 5 |  |  | ―
Total Pre-tax Gains (Losses) Recognized as Regulatory Assets of Liabilities | $ | 110 |  | $ | (206)
(a) | After the settlement of the derivatives and the consumption of the fuel, gains or losses are passed through the fuel cost-recovery clause.
(b) | Amounts in regulatory assets and liabilities related to terminated hedges are reclassified to earnings as the interest expense is recorded. The hedges will be amortized to interest expense over the term of the related debt.
(c) | Amounts are recorded as regulatory assets and liabilities in the Condensed Consolidated Balance Sheets until gains or losses are passed through the fuel cost-recovery clause.
Schedule Of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features |
|  |  | March 31, 2013
(in millions) |  | Duke Energy |  | Progress Energy |  | Duke Energy Progress |  | Duke Energy Florida |  | Duke Energy Ohio
Aggregate fair value amounts of derivative instruments in a net liability position |  | $ | 512 |  | $ | 230 |  | $ | 79 |  | $ | 151 |  | $ | 279
Collateral already posted |  |  | 215 |  |  | 35 |  |  | 3 |  |  | 32 |  |  | 180
Additional cash collateral or letters of credit in the event credit-risk-related contingent features were triggered at the end of the reporting period |  |  | 202 |  |  | 195 |  |  | 76 |  |  | 119 |  |  | 7
|  |  | December 31, 2012
(in millions) |  | Duke Energy |  | Progress Energy |  | Duke Energy Progress |  | Duke Energy Florida |  | Duke Energy Ohio
Aggregate fair value amounts of derivative instruments in a net liability position |  | $ | 466 |  | $ | 286 |  | $ | 108 |  | $ | 178 |  | $ | 176
Collateral already posted |  |  | 163 |  |  | 59 |  |  | 9 |  |  | 50 |  |  | 104
Additional cash collateral or letters of credit in the event credit-risk-related contingent features were triggered at the end of the reporting period |  |  | 230 |  |  | 227 |  |  | 99 |  |  | 128 |  |  | 2
Schedule Of Cash Collateral Under Master Netting Arrangements |
|  | March 31, 2013 |  | December 31, 2012
(in millions) | Receivables |  | Payables |  | Receivables |  | Payables
Duke Energy |  |  |  |  |  |  |  |  |  |  |
Amounts offset against net derivative positions | $ | 107 |  | $ | ― |  | $ | 73 |  | $ | ―
Amounts not offset against net derivative positions |  | 108 |  |  | ― |  |  | 93 |  |  | ―
Progress Energy |  |  |  |  |  |  |  |  |  |  |
Amounts offset against net derivative positions |  | 35 |  |  | ― |  |  | 58 |  |  | ―
Amounts not offset against net derivative positions |  | ― |  |  | ― |  |  | 1 |  |  | ―
Duke Energy Progress |  |  |  |  |  |  |  |  |  |  |
Amounts offset against net derivative positions |  | 3 |  |  | ― |  |  | 9 |  |  | ―
Amounts not offset against net derivative positions |  | ― |  |  | ― |  |  | ― |  |  | ―
Duke Energy Florida |  |  |  |  |  |  |  |  |  |  |
Amounts offset against net derivative positions |  | 32 |  |  | ― |  |  | 49 |  |  | ―
Amounts not offset against net derivative positions |  | ― |  |  | ― |  |  | 1 |  |  | ―
Duke Energy Ohio |  |  |  |  |  |  |  |  |  |  |
Amounts offset against net derivative positions |  | 72 |  |  | ― |  |  | 15 |  |  | ―
Amounts not offset against net derivative positions | $ | 108 |  | $ | ― |  | $ | 92 |  | $ | ―
Duke Energy Progress [Member] |  |
Derivative [Line Items] |  |
Notional Amounts Of Derivative Instruments Related To Interest Rate Risk |  |
|  |  | December 31, 2012
(in millions) |  | Duke Energy |  | Progress Energy |  | Duke Energy Progress |  | Duke Energy Ohio |  | Duke Energy Indiana
Cash flow hedges(a) |  | $ | 1,047 |  | $ | ― |  | $ | ― |  | $ | ― |  | $ | ―
Undesignated contracts |  |  | 290 |  |  | 50 |  |  | 50 |  |  | 27 |  |  | 200
Fair value hedges |  |  | 250 |  |  | ― |  |  | ― |  |  | 250 |  |  | ―
| Total notional amount |  | $ | 1,587 |  | $ | 50 |  | $ | 50 |  | $ | 277 |  | $ | 200
Location And Fair Value Amounts Of Derivatives Reflected In The Condensed Consolidated Balance Sheets |
|  | March 31, 2013 |  | December 31, 2012
(in millions) | Asset |  | Liability |  | Asset |  | Liability
Derivatives Designated as Hedging Instruments |  |  |  |  |  |  |  |  |  |  |
Commodity contracts |  |  |  |  |  |  |  |  |  |  |
Current liabilities: other | $ | ― |  | $ | 1 |  | $ | ― |  |  | 1
Deferred credits and other liabilities: other |  | ― |  |  | 1 |  |  | ― |  |  | 1
Total Derivatives Designated as Hedging Instruments | $ | ― |  | $ | 2 |  | $ | ― |  | $ | 2
Derivatives Not Designated as Hedging Instruments |  |  |  |  |  |  |  |  |  |  |
Commodity contracts(a) |  |  |  |  |  |  |  |  |  |  |
Current assets: other | $ | 4 |  | $ | ― |  | $ | 1 |  | $ | ―
Investments and other assets: other |  | ― |  |  | ― |  |  | 1 |  |  | ―
Current liabilities: other |  | 8 |  |  | 52 |  |  | ― |  |  | 85
Deferred credits and other liabilities: other |  | 2 |  |  | 54 |  |  | ― |  |  | 68
Interest rate contracts |  |  |  |  |  |  |  |  |  |  |
Current liabilities: other |  | ― |  |  | ― |  |  | ― |  |  | 11
Total Derivatives Not Designated as Hedging Instruments | $ | 14 |  | $ | 106 |  | $ | 2 |  | $ | 164
Total Derivatives | $ | 14 |  | $ | 108 |  | $ | 2 |  | $ | 166
(a) | Substantially all of these contracts receive regulatory treatment.
Offsetting Assets and Liabilities |
|  |  | March 31, 2013
(in millions) |  | Gross amounts recognized |  | Gross amounts offset |  | Net amounts included on the Condensed Consolidated Balance Sheet |
Derivative Assets: Current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  | $ | 12 |  | $ | 8 |  | $ | 4 | (a)
Derivative Assets: Non-current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 2 |  |  | 2 |  |  | ― | (b)
Derivative Liabilities: Current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 53 |  |  | 8 |  |  | 45 | (c)
Derivative Liabilities: Non-current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 55 |  |  | 5 |  |  | 50 | (d)
|  |  | December 31, 2012
(in millions) |  | Gross amounts recognized |  | Gross amounts offset |  | Net amounts included on the Condensed Consolidated Balance Sheet |
Derivative Assets: Current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  | $ | 1 |  | $ | ― |  | $ | 1 | (a)
Derivative Assets: Non-current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 1 |  |  | ― |  |  | 1 | (b)
Derivative Liabilities: Current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 97 |  |  | 2 |  |  | 95 | (c)
Derivative Liabilities: Non-current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 69 |  |  | 7 |  |  | 62 | (d)
Cash Flow Hedges-Location And Amount Of Pre-Tax (Losses) Recognized In Comprehensive Income |
|  | Three Months Ended March 31,
(in millions) | 2013 |  | 2012
Pre-tax Gains (Losses) Recorded in AOCI |  |  |  |  |
Interest rate contracts(b) | $ | ― |  | $ | 5
Total Pre-tax Gains (Losses) Recorded in AOCI | $ | ― |  | $ | 5
Location of Pre-tax Gains and (Losses) Reclassified from AOCI into Earnings(a) |  |  |  |  |
Interest rate contracts(b) |  |  |  |  |
Interest expense | $ | ― |  | $ | (3)
Total Pre-tax Gains (Losses) Reclassified from AOCI into Earnings | $ | ― |  | $ | (3)
(a) | Represents the gains and losses on cash flow hedges previously recorded in AOCI during the term of the hedging relationships and reclassified into earnings during the current period
(b) | Amounts in AOCI related to terminated hedges are reclassified to earnings as the interest expense is recorded. The effective portion of the hedges will be amortized to interest expense over the term of the related debt.
Undesignated Contracts - Location And Amount Of Pre-Tax Gains And (Losses) Recognized In Income Or As Regulatory Assets Or Liabilities |
|  | Three Months Ended March 31,
(in millions) | 2013 |  | 2012
Location of Pre-tax Gains and (Losses) Recognized in Earnings |  |  |  |  |
Commodity contracts |  |  |  |  |
Revenue, regulated electric | $ | 6 |  | $ | ―
Fuel used in electric generation and purchased power -regulated(a) |  | (17) |  |  | (26)
Interest rate contracts |  |  |  |  |
Interest expense |  | (3) |  |  | ―
Total Pre-tax (Losses) Gains Recognized in Earnings | $ | (14) |  | $ | (26)
Location of Pre-tax Gains and (Losses) Recognized as Regulatory Assets or Liabilities |  |  |  |  |
Commodity contracts(c) |  |  |  |  |
Regulatory asset | $ | 36 |  | $ | (59)
Interest rate contracts(b) |  |  |  |  |
Regulatory asset |  | 3 |  |  | ―
Total Pre-tax Gains (Losses) Recognized as Regulatory Assets of Liabilities | $ | 39 |  | $ | (59)
(a) | After the settlement of the derivatives and the consumption of fuel, gains or losses are passed through the fuel cost-recovery clause.
(b) | Amounts in regulatory assets and liabilities related to terminated hedges are reclassified to earnings as the interest expense is recorded. The hedges will be amortized to interest expense over the term of the related debt.
(c) | Amounts are recorded in regulatory assets and liabilities in the Condensed Consolidated Balance Sheets until gains or losses are passed through the fuel cost-recovery clause.
Schedule Of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features |
|  |  | March 31, 2013
(in millions) |  | Duke Energy |  | Progress Energy |  | Duke Energy Progress |  | Duke Energy Florida |  | Duke Energy Ohio
Aggregate fair value amounts of derivative instruments in a net liability position |  | $ | 512 |  | $ | 230 |  | $ | 79 |  | $ | 151 |  | $ | 279
Collateral already posted |  |  | 215 |  |  | 35 |  |  | 3 |  |  | 32 |  |  | 180
Additional cash collateral or letters of credit in the event credit-risk-related contingent features were triggered at the end of the reporting period |  |  | 202 |  |  | 195 |  |  | 76 |  |  | 119 |  |  | 7
|  |  | December 31, 2012
(in millions) |  | Duke Energy |  | Progress Energy |  | Duke Energy Progress |  | Duke Energy Florida |  | Duke Energy Ohio
Aggregate fair value amounts of derivative instruments in a net liability position |  | $ | 466 |  | $ | 286 |  | $ | 108 |  | $ | 178 |  | $ | 176
Collateral already posted |  |  | 163 |  |  | 59 |  |  | 9 |  |  | 50 |  |  | 104
Additional cash collateral or letters of credit in the event credit-risk-related contingent features were triggered at the end of the reporting period |  |  | 230 |  |  | 227 |  |  | 99 |  |  | 128 |  |  | 2
Schedule Of Cash Collateral Under Master Netting Arrangements |
|  | March 31, 2013 |  | December 31, 2012
(in millions) | Receivables |  | Payables |  | Receivables |  | Payables
Duke Energy |  |  |  |  |  |  |  |  |  |  |
Amounts offset against net derivative positions | $ | 107 |  | $ | ― |  | $ | 73 |  | $ | ―
Amounts not offset against net derivative positions |  | 108 |  |  | ― |  |  | 93 |  |  | ―
Progress Energy |  |  |  |  |  |  |  |  |  |  |
Amounts offset against net derivative positions |  | 35 |  |  | ― |  |  | 58 |  |  | ―
Amounts not offset against net derivative positions |  | ― |  |  | ― |  |  | 1 |  |  | ―
Duke Energy Progress |  |  |  |  |  |  |  |  |  |  |
Amounts offset against net derivative positions |  | 3 |  |  | ― |  |  | 9 |  |  | ―
Amounts not offset against net derivative positions |  | ― |  |  | ― |  |  | ― |  |  | ―
Duke Energy Florida |  |  |  |  |  |  |  |  |  |  |
Amounts offset against net derivative positions |  | 32 |  |  | ― |  |  | 49 |  |  | ―
Amounts not offset against net derivative positions |  | ― |  |  | ― |  |  | 1 |  |  | ―
Duke Energy Ohio |  |  |  |  |  |  |  |  |  |  |
Amounts offset against net derivative positions |  | 72 |  |  | ― |  |  | 15 |  |  | ―
Amounts not offset against net derivative positions | $ | 108 |  | $ | ― |  | $ | 92 |  | $ | ―
Duke Energy Florida [Member] |  |
Derivative [Line Items] |  |
Location And Fair Value Amounts Of Derivatives Reflected In The Condensed Consolidated Balance Sheets |
|  | March 31, 2013 |  | December 31, 2012
(in millions) | Asset |  | Liability |  | Asset |  | Liability
Derivatives Designated as Hedging Instruments |  |  |  |  |  |  |  |  |  |  |
Commodity contracts |  |  |  |  |  |  |  |  |  |  |
Current liabilities: other | $ | ― |  | $ | ― |  | $ | ― |  | $ | 1
Total Derivatives Designated as Hedging Instruments | $ | ― |  | $ | ― |  | $ | ― |  | $ | 1
Derivatives Not Designated as Hedging Instruments |  |  |  |  |  |  |  |  |  |  |
Commodity contracts(a) |  |  |  |  |  |  |  |  |  |  |
Current Assets: Other | $ | 8 |  | $ | ― |  | $ | 2 |  | $ | ―
Investments and Other Assets: Other |  | 2 |  |  | ― |  |  | 7 |  |  | ―
Current liabilities: other |  | 13 |  |  | 89 |  |  | ― |  |  | 146
Deferred credits and other liabilities: other |  | 10 |  |  | 101 |  |  | ― |  |  | 123
Total Derivatives Not Designated as Hedging Instruments | $ | 33 |  | $ | 190 |  | $ | 9 |  | $ | 269
Total Derivatives | $ | 33 |  | $ | 190 |  | $ | 9 |  | $ | 270
(a) | Substantially all of these contracts receive regulatory treatment.
Offsetting Assets and Liabilities |
|  |  | March 31, 2013
(in millions) |  | Gross amounts recognized |  | Gross amounts offset |  | Net amounts included on Condensed Balance Sheet |
Derivative Assets: Current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  | $ | 21 |  | $ | 13 |  | $ | 8 | (a)
Derivative Assets: Non-current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 12 |  |  | 10 |  |  | 2 | (b)
Derivative Liabilities: Current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 89 |  |  | 26 |  |  | 63 | (c)
Derivative Liabilities: Non-current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 101 |  |  | 29 |  |  | 72 | (d)
|  |  | December 31, 2012
(in millions) |  | Gross amounts recognized |  | Gross amounts offset |  | Net amounts included on Condensed Balance Sheet |
Derivative Assets: Current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  | $ | 2 |  | $ | ― |  | $ | 2 | (a)
Derivative Assets: Non-current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 7 |  |  | ― |  |  | 7 | (b)
Derivative Liabilities: Current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 147 |  |  | 20 |  |  | 127 | (c)
Derivative Liabilities: Non-current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 123 |  |  | 29 |  |  | 94 | (d)
Undesignated Contracts - Location And Amount Of Pre-Tax Gains And (Losses) Recognized In Income Or As Regulatory Assets Or Liabilities |
|  | Three Months Ended March 31,
(in millions) | 2013 |  | 2012
Location of Pre-tax Gains and (Losses) Recognized in Earnings |  |  |  |  |
Commodity contracts |  |  |  |  |
Fuel used in electric generation and purchased power - regulated(a) | $ | (35) |  | $ | (79)
Interest rate contracts |  |  |  |  |
Interest expense |  | (1) |  |  | ―
Total Pre-tax (Losses) Gains Recognized in Earnings | $ | (36) |  | $ | (79)
Location of Pre-tax Gains and (Losses) Recognized as Regulatory Assets or Liabilities |  |  |  |  |
Commodity contracts(b) |  |  |  |  |
Regulatory asset | $ | 69 |  | $ | (147)
Interest rate contracts |  |  |  |  |
Regulatory asset |  | 1 |  |  | ―
Total Pre-tax Gains (Losses) Recognized as Regulatory Assets of Liabilities | $ | 70 |  | $ | (147)
(a) | After the settlement of the derivatives and the consumption of fuel, gains or losses are passed through the fuel cost-recovery clause.
(b) | Amounts are recorded in regulatory assets and liabilities in the Condensed Balance Sheets until gains or losses are passed through the fuel cost-recovery clause.
Schedule Of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features |
|  |  | March 31, 2013
(in millions) |  | Duke Energy |  | Progress Energy |  | Duke Energy Progress |  | Duke Energy Florida |  | Duke Energy Ohio
Aggregate fair value amounts of derivative instruments in a net liability position |  | $ | 512 |  | $ | 230 |  | $ | 79 |  | $ | 151 |  | $ | 279
Collateral already posted |  |  | 215 |  |  | 35 |  |  | 3 |  |  | 32 |  |  | 180
Additional cash collateral or letters of credit in the event credit-risk-related contingent features were triggered at the end of the reporting period |  |  | 202 |  |  | 195 |  |  | 76 |  |  | 119 |  |  | 7
|  |  | December 31, 2012
(in millions) |  | Duke Energy |  | Progress Energy |  | Duke Energy Progress |  | Duke Energy Florida |  | Duke Energy Ohio
Aggregate fair value amounts of derivative instruments in a net liability position |  | $ | 466 |  | $ | 286 |  | $ | 108 |  | $ | 178 |  | $ | 176
Collateral already posted |  |  | 163 |  |  | 59 |  |  | 9 |  |  | 50 |  |  | 104
Additional cash collateral or letters of credit in the event credit-risk-related contingent features were triggered at the end of the reporting period |  |  | 230 |  |  | 227 |  |  | 99 |  |  | 128 |  |  | 2
Schedule Of Cash Collateral Under Master Netting Arrangements |
|  | March 31, 2013 |  | December 31, 2012
(in millions) | Receivables |  | Payables |  | Receivables |  | Payables
Duke Energy |  |  |  |  |  |  |  |  |  |  |
Amounts offset against net derivative positions | $ | 107 |  | $ | ― |  | $ | 73 |  | $ | ―
Amounts not offset against net derivative positions |  | 108 |  |  | ― |  |  | 93 |  |  | ―
Progress Energy |  |  |  |  |  |  |  |  |  |  |
Amounts offset against net derivative positions |  | 35 |  |  | ― |  |  | 58 |  |  | ―
Amounts not offset against net derivative positions |  | ― |  |  | ― |  |  | 1 |  |  | ―
Duke Energy Progress |  |  |  |  |  |  |  |  |  |  |
Amounts offset against net derivative positions |  | 3 |  |  | ― |  |  | 9 |  |  | ―
Amounts not offset against net derivative positions |  | ― |  |  | ― |  |  | ― |  |  | ―
Duke Energy Florida |  |  |  |  |  |  |  |  |  |  |
Amounts offset against net derivative positions |  | 32 |  |  | ― |  |  | 49 |  |  | ―
Amounts not offset against net derivative positions |  | ― |  |  | ― |  |  | 1 |  |  | ―
Duke Energy Ohio |  |  |  |  |  |  |  |  |  |  |
Amounts offset against net derivative positions |  | 72 |  |  | ― |  |  | 15 |  |  | ―
Amounts not offset against net derivative positions | $ | 108 |  | $ | ― |  | $ | 92 |  | $ | ―
Duke Energy Ohio [Member] |  |
Derivative [Line Items] |  |
Notional Amounts Of Derivative Instruments Related To Interest Rate Risk |
|  |  | March 31, 2013
(in millions) |  | Duke Energy |  | Progress Energy |  | Duke Energy Progress |  | Duke Energy Ohio |  | Duke Energy Indiana
Cash flow hedges(a) |  | $ | 1,047 |  | $ | ― |  | $ | ― |  | $ | ― |  | $ | ―
Undesignated contracts |  |  | 238 |  |  | ― |  |  | ― |  |  | 27 |  |  | 200
Fair value hedges |  |  | 250 |  |  | ― |  |  | ― |  |  | 250 |  |  | ―
| Total notional amount |  | $ | 1,535 |  | $ | ― |  | $ | ― |  | $ | 277 |  | $ | 200
|  |  | December 31, 2012
(in millions) |  | Duke Energy |  | Progress Energy |  | Duke Energy Progress |  | Duke Energy Ohio |  | Duke Energy Indiana
Cash flow hedges(a) |  | $ | 1,047 |  | $ | ― |  | $ | ― |  | $ | ― |  | $ | ―
Undesignated contracts |  |  | 290 |  |  | 50 |  |  | 50 |  |  | 27 |  |  | 200
Fair value hedges |  |  | 250 |  |  | ― |  |  | ― |  |  | 250 |  |  | ―
| Total notional amount |  | $ | 1,587 |  | $ | 50 |  | $ | 50 |  | $ | 277 |  | $ | 200
Location And Fair Value Amounts Of Derivatives Reflected In The Condensed Consolidated Balance Sheets |
|  | March 31, 2013 |  | December 31, 2012
(in millions) | Asset |  | Liability |  | Asset |  | Liability
Derivatives Designated as Hedging Instruments |  |  |  |  |  |  |  |  |  |  |
Interest rate contracts |  |  |  |  |  |  |  |  |  |  |
Current assets: other | $ | 2 |  | $ | ― |  | $ | 2 |  | $ | ―
Total Derivatives Designated as Hedging Instruments | $ | 2 |  | $ | ― |  | $ | 2 |  | $ | ―
Derivatives Not Designated as Hedging Instruments |  |  |  |  |  |  |  |  |  |  |
Commodity contracts |  |  |  |  |  |  |  |  |  |  |
Current assets: other | $ | 42 |  | $ | 32 |  | $ | 31 |  | $ | 4
Investments and other assets: other |  | 13 |  |  | 7 |  |  | 81 |  |  | 51
Current liabilities: other |  | 130 |  |  | 182 |  |  | 106 |  |  | 132
Deferred credits and other liabilities: other |  | 57 |  |  | 91 |  |  | ― |  |  | 4
Interest rate contracts |  |  |  |  |  |  |  |  |  |  |
Current liabilities: other |  | ― |  |  | 1 |  |  | ― |  |  | 1
Deferred credits and other liabilities: other |  | ― |  |  | 6 |  |  | ― |  |  | 7
Total Derivatives Not Designated as Hedging Instruments | $ | 242 |  | $ | 319 |  | $ | 218 |  | $ | 199
Total Derivatives | $ | 244 |  | $ | 319 |  | $ | 220 |  | $ | 199
Offsetting Assets and Liabilities |
|  |  | March 31, 2013
(in millions) |  | Gross amounts recognized |  | Gross amounts offset |  | Net amounts included on the Condensed Consolidated Balance Sheet |
Derivative Assets: Current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  | $ | 172 |  | $ | 163 |  | $ | 9 |
Not Subject to Master Netting |  |  | 2 |  |  | ― |  |  | 2 |
Total Derivative Assets: Current |  |  | 174 |  |  | 163 |  |  | 11 | (a)
Derivative Assets: Non-current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 70 |  |  | 63 |  |  | 7 | (b)
Derivative Liabilities: Current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 214 |  |  | 209 |  |  | 5 |
Not Subject to Master Netting |  |  | 1 |  |  | ― |  |  | 1 |
Total Derivative Liabilities: Current |  |  | 215 |  |  | 209 |  |  | 6 | (c)
Derivative Liabilities: Non-current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 98 |  |  | 90 |  |  | 8 |
Not Subject to Master Netting |  |  | 6 |  |  | ― |  |  | 6 |
Total Derivative Liabilities: Non-current |  |  | 104 |  |  | 90 |  |  | 14 | (d)
|  |  | December 31, 2012
(in millions) |  | Gross amounts recognized |  | Gross amounts offset |  | Net amounts included on the Condensed Consolidated Balance Sheet |
Derivative Assets: Current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  | $ | 137 |  | $ | 110 |  | $ | 27 |
Not Subject to Master Netting |  |  | 2 |  |  | ― |  |  | 2 |
Total Derivative Assets: Current |  |  | 139 |  |  | 110 |  |  | 29 | (a)
Derivative Assets: Non-current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 81 |  |  | 51 |  |  | 30 | (b)
Derivative Liabilities: Current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 136 |  |  | 125 |  |  | 11 |
Not Subject to Master Netting |  |  | 1 |  |  | ― |  |  | 1 |
Total Derivative Liabilities: Current |  |  | 137 |  |  | 125 |  |  | 12 | (c)
Derivative Liabilities: Non-current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  |  | 55 |  |  | 51 |  |  | 4 |
Not Subject to Master Netting |  |  | 7 |  |  | ― |  |  | 7 |
Total Derivative Liabilities: Non-current |  |  | 62 |  |  | 51 |  |  | 11 | (d)
Undesignated Contracts - Location And Amount Of Pre-Tax Gains And (Losses) Recognized In Income Or As Regulatory Assets Or Liabilities |
|  | Three Months Ended March 31,
(in millions) | 2013 |  | 2012
Location of Pre-tax Gains and (Losses) Recognized in Earnings |  |  |  |  |
Commodity contracts |  |  |  |  |
Revenue, nonregulated electric, natural gas and other | $ | (91) |  | $ | 71
Fuel used in electric generation and purchased power - nonregulated |  | (7) |  |  | ―
Total Pre-tax (Losses) Gains Recognized in Earnings | $ | (98) |  | $ | 71
Location of Pre-tax Gains and (Losses) Recognized as Regulatory Assets or Liabilities |  |  |  |  |
Commodity contracts |  |  |  |  |
Regulatory asset | $ | ― |  | $ | (2)
Interest rate contracts |  |  |  |  |
Regulatory asset |  | 1 |  |  | 1
Total Pre-tax Gains (Losses) Recognized as Regulatory Assets of Liabilities | $ | 1 |  | $ | (1)
Schedule Of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features |
|  |  | March 31, 2013
(in millions) |  | Duke Energy |  | Progress Energy |  | Duke Energy Progress |  | Duke Energy Florida |  | Duke Energy Ohio
Aggregate fair value amounts of derivative instruments in a net liability position |  | $ | 512 |  | $ | 230 |  | $ | 79 |  | $ | 151 |  | $ | 279
Collateral already posted |  |  | 215 |  |  | 35 |  |  | 3 |  |  | 32 |  |  | 180
Additional cash collateral or letters of credit in the event credit-risk-related contingent features were triggered at the end of the reporting period |  |  | 202 |  |  | 195 |  |  | 76 |  |  | 119 |  |  | 7
|  |  | December 31, 2012
(in millions) |  | Duke Energy |  | Progress Energy |  | Duke Energy Progress |  | Duke Energy Florida |  | Duke Energy Ohio
Aggregate fair value amounts of derivative instruments in a net liability position |  | $ | 466 |  | $ | 286 |  | $ | 108 |  | $ | 178 |  | $ | 176
Collateral already posted |  |  | 163 |  |  | 59 |  |  | 9 |  |  | 50 |  |  | 104
Additional cash collateral or letters of credit in the event credit-risk-related contingent features were triggered at the end of the reporting period |  |  | 230 |  |  | 227 |  |  | 99 |  |  | 128 |  |  | 2
Schedule Of Cash Collateral Under Master Netting Arrangements |
|  | March 31, 2013 |  | December 31, 2012
(in millions) | Receivables |  | Payables |  | Receivables |  | Payables
Duke Energy |  |  |  |  |  |  |  |  |  |  |
Amounts offset against net derivative positions | $ | 107 |  | $ | ― |  | $ | 73 |  | $ | ―
Amounts not offset against net derivative positions |  | 108 |  |  | ― |  |  | 93 |  |  | ―
Progress Energy |  |  |  |  |  |  |  |  |  |  |
Amounts offset against net derivative positions |  | 35 |  |  | ― |  |  | 58 |  |  | ―
Amounts not offset against net derivative positions |  | ― |  |  | ― |  |  | 1 |  |  | ―
Duke Energy Progress |  |  |  |  |  |  |  |  |  |  |
Amounts offset against net derivative positions |  | 3 |  |  | ― |  |  | 9 |  |  | ―
Amounts not offset against net derivative positions |  | ― |  |  | ― |  |  | ― |  |  | ―
Duke Energy Florida |  |  |  |  |  |  |  |  |  |  |
Amounts offset against net derivative positions |  | 32 |  |  | ― |  |  | 49 |  |  | ―
Amounts not offset against net derivative positions |  | ― |  |  | ― |  |  | 1 |  |  | ―
Duke Energy Ohio |  |  |  |  |  |  |  |  |  |  |
Amounts offset against net derivative positions |  | 72 |  |  | ― |  |  | 15 |  |  | ―
Amounts not offset against net derivative positions | $ | 108 |  | $ | ― |  | $ | 92 |  | $ | ―
Duke Energy Indiana [Member] |  |
Derivative [Line Items] |  |
Notional Amounts Of Derivative Instruments Related To Interest Rate Risk |
|  |  | March 31, 2013
(in millions) |  | Duke Energy |  | Progress Energy |  | Duke Energy Progress |  | Duke Energy Ohio |  | Duke Energy Indiana
Cash flow hedges(a) |  | $ | 1,047 |  | $ | ― |  | $ | ― |  | $ | ― |  | $ | ―
Undesignated contracts |  |  | 238 |  |  | ― |  |  | ― |  |  | 27 |  |  | 200
Fair value hedges |  |  | 250 |  |  | ― |  |  | ― |  |  | 250 |  |  | ―
| Total notional amount |  | $ | 1,535 |  | $ | ― |  | $ | ― |  | $ | 277 |  | $ | 200
|  |  | December 31, 2012
(in millions) |  | Duke Energy |  | Progress Energy |  | Duke Energy Progress |  | Duke Energy Ohio |  | Duke Energy Indiana
Cash flow hedges(a) |  | $ | 1,047 |  | $ | ― |  | $ | ― |  | $ | ― |  | $ | ―
Undesignated contracts |  |  | 290 |  |  | 50 |  |  | 50 |  |  | 27 |  |  | 200
Fair value hedges |  |  | 250 |  |  | ― |  |  | ― |  |  | 250 |  |  | ―
| Total notional amount |  | $ | 1,587 |  | $ | 50 |  | $ | 50 |  | $ | 277 |  | $ | 200
Location And Fair Value Amounts Of Derivatives Reflected In The Condensed Consolidated Balance Sheets |
|  | March 31, 2013 |  | December 31, 2012
(in millions) | Asset |  | Liability |  | Asset |  | Liability
Derivatives Not Designated as Hedging Instruments |  |  |  |  |  |  |  |  |  |  |
Commodity contracts |  |  |  |  |  |  |  |  |  |  |
Current assets: other | $ | 5 |  | $ | ― |  | $ | 10 |  | $ | ―
Interest rate contracts |  |  |  |  |  |  |  |  |  |  |
Current liabilities: other |  | ― |  |  | 55 |  |  | ― |  |  | 63
Total Derivatives Not Designated as Hedging Instruments | $ | 5 |  | $ | 55 |  | $ | 10 |  | $ | 63
Total Derivatives | $ | 5 |  | $ | 55 |  | $ | 10 |  | $ | 63
Offsetting Assets and Liabilities |
|  |  | March 31, 2013
(in millions) |  | Gross amounts recognized |  | Gross amounts offset |  | Net amounts included on the Condensed Consolidated Balance Sheets |
Derivative Assets: Current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  | $ | 5 |  | $ | ― |  | $ | 5 | (a)
Derivative Liabilities: Current |  |  |  |  |  |  |  |  |  |
Not Subject to Master Netting |  |  | 55 |  |  | ― |  |  | 55 | (b)
|  |  | December 31, 2012
(in millions) |  | Gross amounts recognized |  | Gross amounts offset |  | Net amounts included on the Condensed Consolidated Balance Sheets |
Derivative Assets: Current |  |  |  |  |  |  |  |  |  |
Subject to Master Netting |  | $ | 10 |  | $ | ― |  | $ | 10 | (a)
Derivative Liabilities: Current |  |  |  |  |  |  |  |  |  |
Not Subject to Master Netting |  |  | 63 |  |  | ― |  |  | 63 | (b)
Undesignated Contracts - Location And Amount Of Pre-Tax Gains And (Losses) Recognized In Income Or As Regulatory Assets Or Liabilities |
|  | Three Months Ended March 31,
(in millions) | 2013 |  | 2012
Location of Pre-tax Gains and (Losses) Recognized as Regulatory Assets or Liabilities |  |  |  |  |
Commodity contracts |  |  |  |  |
Regulatory liability | $ | 4 |  | $ | 4
Interest rate contracts |  |  |  |  |
Regulatory asset |  | 8 |  |  | 21
Total Pre-tax Gains (Losses) Recognized as Regulatory Assets of Liabilities | $ | 12 |  | $ | 25

X
- Definition Tabular disclosure of derivative and other financial assets and liabilities that are subject to offsetting, including master netting arrangements. + References No definition available. + Details
Name: | duk_OffsettingAssetsLiabilitiesTableTextBlock
Namespace Prefix: | duk_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of Derivatives In Net Liability Position [Table Text Block] + References No definition available. + Details
Name: | duk_ScheduleOfCashCollateralUnderMasterNettingArrangementsTableTextBlock
Namespace Prefix: | duk_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of Information Regarding Derivative Instruments that Contain Credit-risk Related Contingent + References No definition available. + Details
Name: | duk_ScheduleOfInformationRegardingDerivativeInstrumentsThatContainCreditRiskRelatedContingentTableTextBlock
Namespace Prefix: | duk_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the effective portion of gains and losses on derivative instruments (and nonderivative instruments) designated and qualifying in cash flow hedges recorded in accumulated other comprehensive income (loss) during the term of the hedging relationship and reclassified into earnings during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
Name: | us-gaap_ScheduleOfCashFlowHedgesIncludedInAccumulatedOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G -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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph a -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. + Details
Name: | us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of interest rate derivatives, including, but not limited to, the fair value of the derivatives, statement of financial position location, and statement of financial performance location of these instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
Name: | us-gaap_ScheduleOfInterestRateDerivativesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the notional amounts of outstanding derivative positions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959 + Details
Name: | us-gaap_ScheduleOfNotionalAmountsOfOutstandingDerivativePositionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure for other derivative instruments not designated as hedging instruments of (a) the location and amount of gains and losses reported in the statement of financial performance and (b) the location and fair value amounts of the instruments reported in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
Name: | us-gaap_ScheduleOfOtherDerivativesNotDesignatedAsHedgingInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration