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Fair Value of Financial Assets and Liabilities (Tables)
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3 Months Ended |
12 Months Ended |
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Mar. 31, 2013
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Mar. 31, 2012
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Dec. 31, 2012
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| Fair Value Disclosures [Line Items] |
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| Fair Value Measurement Amounts For Assets And Liabilities |
| | | | | | | | | | | | | | | | | | | March 31, 2013 | | (in millions) | | Total Fair Value | Level 1 | | Level 2 | | Level 3 | | Investments in available-for-sale auction rate securities(a) | | $ | 28 | | $ | ― | | $ | ― | | $ | 28 | | Nuclear decommissioning trust fund equity securities | | | 3,104 | | | 3,026 | | | 57 | | | 21 | | Nuclear decommissioning trust fund debt securities | | | 1,432 | | | 356 | | | 1,027 | | | 49 | | Other trading and available-for-sale equity securities(b) | | | 93 | | | 84 | | | 9 | | | ― | | Other trading and available-for-sale debt securities(c) | | | 634 | | | 94 | | | 540 | | | ― | | Derivative assets(b) | | | 75 | | | 1 | | | 20 | | | 54 | | | Total assets | | | 5,366 | | | 3,561 | | | 1,653 | | | 152 | | Derivative liabilities(d) | | | (611) | | | (77) | | | (398) | | | (136) | | | Net assets | | $ | 4,755 | | $ | 3,484 | | $ | 1,255 | | $ | 16 |
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| | | | | | | | | | | | | | | | | | | December 31, 2012 | | (in millions) | | Total Fair Value | | Level 1 | | Level 2 | | Level 3 | | Investments in available-for-sale auction rate securities(a) | | $ | 29 | | $ | ― | | $ | ― | | $ | 29 | | Nuclear decommissioning trust fund equity securities | | | 2,837 | | | 2,762 | | | 54 | | | 21 | | Nuclear decommissioning trust fund debt securities | | | 1,405 | | | 317 | | | 1,040 | | | 48 | | Other trading and available-for-sale equity securities(b) | | | 72 | | | 63 | | | 9 | | | ― | | Other trading and available-for-sale debt securities(c) | | | 602 | | | 40 | | | 562 | | | ― | | Derivative assets(b) | | | 103 | | | 18 | | | 22 | | | 63 | | | Total assets | | | 5,048 | | | 3,200 | | | 1,687 | | | 161 | | Derivative liabilities(d) | | | (756) | | | (17) | | | (591) | | | (148) | | | Net assets | | $ | 4,292 | | $ | 3,183 | | $ | 1,096 | | $ | 13 | | | | | | | | | | | | | | | | | (a) | Included in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets. | | (b) | Included in Other within Current Assets and Other within Investments and Other Assets on the Condensed Consolidated Balance Sheet. | | (c) | Included in Other within Investments and Other Assets and Short-term Investments on the Condensed Consolidated Balance Sheets. | | (d) | Included in Other within Current Liabilities and Other within Deferred Credits and Other Liabilities on the Condensed Consolidated Balance Sheets. |
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| Reconciliation Of Assets And Liabilities Measured At Fair Value On A Recurring Basis Using Unobservable Inputs |
| | | | Three Months Ended March 31, 2013 | | (in millions) | Available-for-Sale Auction Rate Securities | | Available-for-Sale NDTF Investments | | Derivatives (net) | | Total | | Balance at December 31, 2012 | $ | 29 | | $ | 69 | | $ | (85) | | $ | 13 | | | Total pre-tax realized or unrealized gains (losses) included in earnings: | | | | | | | | | | | | | | | Regulated electric | | ― | | | ― | | | (6) | | | (6) | | | | Revenue, nonregulated electric, natural gas, and other | | ― | | | ― | | | (4) | | | (4) | | | Total pre-tax gains included in other comprehensive income: | | | | | | | | | | | | | | | Losses on available for sale securities and other | | (1) | | | ― | | | ― | | | (1) | | | Purchases, sales, issuances and settlements: | | | | | | | | | | | | | | | Issuances | | ― | | | ― | | | 6 | | | 6 | | | | Settlements | | ― | | | ― | | | 7 | | | 7 | | | Total gains included on the Consolidated Balance Sheet as regulatory asset or liability | | ― | | | 1 | | | ― | | | 1 | | Balance at March 31, 2013 | $ | 28 | | $ | 70 | | $ | (82) | | $ | 16 | | Pre-tax amounts included in the Consolidated Statements of Comprehensive Income related to Level 3 measurements outstanding at March 31, 2013 | | | | | | | | | | | | | | | Regulated electric | $ | ― | | $ | ― | | $ | 1 | | | 1 | | | | Revenue, nonregulated electric, natural gas, and other | | ― | | | ― | | | (10) | | | (10) | | Total | $ | ― | | $ | ― | | $ | (9) | | $ | (9) | | | | | | | | | | | | | | | |
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| | | | | | | | | | | | | | | | | | | Three Months Ended March 31, 2012 | | (in millions) | Available-for-Sale Auction Rate Securities | | Available-for-Sale NDTF Investments | | Derivatives (net) | | Total | | Balance at December 31, 2011 | $ | 71 | | $ | 53 | | $ | (39) | | $ | 85 | | | Total pre-tax realized or unrealized gains (losses) included in earnings: | | | | | | | | | | | | | | | Regulated electric | | ― | | | ― | | | 8 | | | 8 | | | | Revenue, nonregulated electric, natural gas, and other | | ― | | | ― | | | (2) | | | (2) | | | Total pre-tax gains included in other comprehensive income: | | | | | | | | | | | | | | | Gains on available for sale securities and other | | 1 | | | ― | | | ― | | | 1 | | | Purchases, sales, issuances and settlements: | | | | | | | | | | | | | | | Purchases | | ― | | | 2 | | | ― | | | 2 | | | | Settlements | | ― | | | ― | | | (9) | | | (9) | | | Total gains included on the Condensed Consolidated Balance Sheet as regulatory asset or liability | | ― | | | 1 | | | ― | | | 1 | | Balance at March 31, 2012 | $ | 72 | | $ | 56 | | $ | (42) | | $ | 86 |
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| Schedule of Long-term debt, including current |
| | | | | March 31, 2013 | | December 31, 2012 | | (in millions) | Book Value | | Fair Value | | Book Value | | Fair Value | | Duke Energy (a) | $ | 39,662 | | $ | 44,068 | | $ | 39,461 | | $ | 44,001 | | Duke Energy Carolinas(b) | | 8,740 | | | 10,036 | | | 8,741 | | | 10,096 | | Progress Energy | | 14,224 | | | 16,276 | | | 14,428 | | | 16,563 | | Duke Energy Progress | | 5,336 | | | 5,757 | | | 4,840 | | | 5,277 | | Duke Energy Florida | | 4,894 | | | 5,730 | | | 5,320 | | | 6,222 | | Duke Energy Ohio | | 1,994 | | | 2,142 | | | 1,997 | | | 2,117 | | Duke Energy Indiana | | 3,702 | | | 4,228 | | | 3,702 | | | 4,268 | | | | | | | | | | | | | | | | | | (a) | Includes book value of Non-recourse long-term debt of variable interest entities of $1,255 million and $852 million March 31, 2013 and December 31, 2012, respectively. | | (b) | Includes book value of Non-recourse long-term debt of variable interest entities of $300 million at both March 31, 2013 and December 31, 2012, respectively. | | | | | | | | | | | | | | | | |
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| Quantitative Information Table - Level 3 |
| | | | March 31, 2013 | | Investment Type | | Fair Value
(in millions) | | Valuation Technique | | Unobservable Input | | Range | | Duke Energy | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (85) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 2.84 | $ | 10.30 | | FERC mitigation power sale agreements | | | (10) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.35 | - | 54.56 | | Financial transmission rights (FTRs) | | | 4 | | RTO market pricing | | FTR price | | | (0.42) | - | 12.72 | | Commodity power contracts | | | 17 | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 28.40 | - | 81.60 | | Commodity capacity contracts | | | (3) | | Discounted cash flow | | Forward capacity curves - price per MW day | | | 95.16 | - | 122.64 | | Commodity capacity option contracts | | | 2 | | Discounted cash flow | | Forward capacity option curves - price per MW day | | | 31.15 | - | 81.60 | | Reserves | | | (7) | | | | Bid-ask spreads, implied volatility, probability of default | | | | | | | Duke Energy Carolinas | | | | | | | | | | | | | | FERC mitigation power sale agreements | | $ | (5) | | Discounted cash flow | | Forward electricity curves - price per MWh | | $ | 28.18 | - | 54.56 | | Progress Energy | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (26) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 4.13 | - | 4.54 | | FERC mitigation power sale agreements | | | (5) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.35 | - | 48.68 | | Duke Energy Progress | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (26) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 4.13 | - | 4.54 | | FERC mitigation power sale agreements | | | (5) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.35 | - | 48.68 | | Duke Energy Ohio | | | | | | | | | | | | | | Commodity power contracts | | $ | 25 | | Discounted cash flow | | Forward electricity curves - price per MWh | | $ | 28.40 | - | 61.35 | | Commodity natural gas contracts | | | (23) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | | 3.98 | - | 4.69 | | Reserves | | | (7) | | | | Bid-ask spreads, implied volatility, probability of default | | | | | | | Duke Energy Indiana | | | | | | | | | | | | | | Financial transmission rights (FTRs) | | $ | 4 | | RTO market pricing | | FTR price | | $ | (0.42) | $ | 12.72 | | | | | | | | | | | | | | | |
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| | | | | | | | | | | | | | | | | | | December 31, 2012 | | Investment Type | | Fair Value
(in millions) | | Valuation Technique | | Unobservable Input | | Range | | Duke Energy | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (53) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 2.33 | $ | 9.99 | | FERC mitigation power sale agreements | | | (23) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.83 | - | 48.69 | | Financial transmission rights (FTRs) | | | 11 | | RTO market pricing | | FTR price | | | 23.63 | - | 39.22 | | Commodity power contracts | | | (8) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 24.82 | - | 77.96 | | Commodity capacity contracts | | | (3) | | Discounted cash flow | | Forward capacity curves - price per MW day | | | 95.16 | - | 105.36 | | Commodity capacity option contracts | | | 3 | | Discounted cash flow | | Forward capacity option curves - price per MW day | | | 4.68 | - | 77.96 | | Reserves | | | (12) | | | | Bid-ask spreads, implied volatility, probability of default | | | | | | | Duke Energy Carolinas | | | | | | | | | | | | | | FERC mitigation power sale agreements | | $ | (12) | | Discounted cash flow | | Forward electricity curves - price per MWh | | $ | 25.83 | - | 48.69 | | Progress Energy | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (27) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 4.07 | - | 4.45 | | FERC mitigation power sale agreements | | | (11) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.83 | - | 48.69 | | Duke Energy Progress | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (27) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 4.07 | - | 4.45 | | FERC mitigation power sale agreements | | | (11) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.83 | - | 48.69 | | Duke Energy Ohio | | | | | | | | | | | | | | Financial transmission rights (FTRs) | | $ | 1 | | RTO market pricing | | FTR price | | $ | 27.17 | $ | 39.22 | | Commodity power contracts | | | (1) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.90 | - | 57.50 | | Commodity natural gas contracts | | | 5 | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | | 3.30 | - | 4.51 | | Reserves | | | (11) | | | | Bid-ask spreads, implied volatility, probability of default | | | | | | | Duke Energy Indiana | | | | | | | | | | | | | | Financial transmission rights (FTRs) | | $ | 10 | | RTO market pricing | | FTR price | | $ | 23.63 | $ | 35.43 |
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Duke Energy Carolinas [Member]
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| Fair Value Disclosures [Line Items] |
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| Fair Value Measurement Amounts For Assets And Liabilities |
| | | | | | | | | | | | | | | | | | | | March 31, 2013 | | (in millions) | Total Fair Value | | Level 1 | | Level 2 | | Level 3 | | Investments in available-for-sale auction rate securities(a) | | $ | 3 | | $ | ― | | $ | ― | | $ | 3 | | Nuclear decommissioning trust fund equity securities | | | 1,734 | | | 1,663 | | | 50 | | | 21 | | Nuclear decommissioning trust fund debt securities | | | 785 | | | 180 | | | 556 | | | 49 | | | Total assets | | $ | 2,522 | | $ | 1,843 | | $ | 606 | | $ | 73 | | Derivative liabilities(b) | | | (5) | | | ― | | | ― | | | (5) | | | Net assets | | $ | 2,517 | | $ | 1,843 | | $ | 606 | | $ | 68 |
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| | | | | | | | | | | | | | | | | | | December 31, 2012 | | (in millions) | | Total Fair Value | | Level 1 | | Level 2 | | Level 3 | | Investments in available-for-sale auction rate securities(a) | | $ | 3 | | $ | ― | | $ | ― | | $ | 3 | | Nuclear decommissioning trust fund equity securities | | | 1,592 | | | 1,523 | | | 48 | | | 21 | | Nuclear decommissioning trust fund debt securities | | | 762 | | | 155 | | | 559 | | | 48 | | | Total assets | | $ | 2,357 | | $ | 1,678 | | $ | 607 | | $ | 72 | | Derivative liabilities(b) | | | (12) | | | ― | | | ― | | | (12) | | | Net Assets | | $ | 2,345 | | $ | 1,678 | | $ | 607 | | $ | 60 | | | | | | | | | | | | | | | | | (a) | Included in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets. | | (b) | Included in Other within Current Liabilities and Other within Deferred Credits and Other Liabilities on the Condensed Consolidated Balance Sheet. |
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| Reconciliation Of Assets And Liabilities Measured At Fair Value On A Recurring Basis Using Unobservable Inputs |
| | | | Three Months Ended March 31,2013 | | | | | Available-for-Sale Auction Rate Securities | | Available-for-Sale NDTF Investments | | Derivatives (net) | | Total | | Balance at December 31, 2012 | $ | 3 | | $ | 69 | | $ | (12) | | $ | 60 | | | Purchases, sales, issuances and settlements: | | | | | | | | | | | | | | | Settlements | | ― | | | ― | | | 7 | | | 7 | | | Total gains included on the Condensed Consolidated Balance Sheet as regulatory asset or liability | | ― | | | 1 | | | ― | | | 1 | | Balance at March 31, 2013 | $ | 3 | | $ | 70 | | $ | (5) | | $ | 68 | | Pre-tax amounts included in the Condensed Consolidated Statements of Comprehensive Income related to Level 3 measurements outstanding at March 31, 2013 | | | | | | | | | | | | | | | Regulated electric | $ | ― | | $ | ― | | $ | (5) | | | (5) | | Total | $ | ― | | $ | ― | | $ | (5) | | $ | (5) | | | | | | | | | | | | | | | |
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| | | | | | | | | | | | | | | | | | | Three Months Ended March 31, 2012 | | | | | Available-for-Sale Auction Rate Securities | | Available-for-Sale NDTF Investments | | Derivatives (net) | | Total | | Balance at December 31, 2011 | $ | 12 | | $ | 53 | | $ | ― | | $ | 65 | | | Purchases, sales, issuances and settlements: | | | | | | | | | | | | | | | Purchases | | ― | | | 2 | | | ― | | | 2 | | | Total gains included on the Condensed Consolidated Balance Sheet as regulatory asset or liability | | ― | | | 1 | | | ― | | | 1 | | Balance at March 31, 2012 | $ | 12 | | $ | 56 | | $ | ― | | $ | 68 |
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| Quantitative Information Table - Level 3 |
| | | | March 31, 2013 | | Investment Type | | Fair Value
(in millions) | | Valuation Technique | | Unobservable Input | | Range | | Duke Energy | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (85) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 2.84 | $ | 10.30 | | FERC mitigation power sale agreements | | | (10) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.35 | - | 54.56 | | Financial transmission rights (FTRs) | | | 4 | | RTO market pricing | | FTR price | | | (0.42) | - | 12.72 | | Commodity power contracts | | | 17 | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 28.40 | - | 81.60 | | Commodity capacity contracts | | | (3) | | Discounted cash flow | | Forward capacity curves - price per MW day | | | 95.16 | - | 122.64 | | Commodity capacity option contracts | | | 2 | | Discounted cash flow | | Forward capacity option curves - price per MW day | | | 31.15 | - | 81.60 | | Reserves | | | (7) | | | | Bid-ask spreads, implied volatility, probability of default | | | | | | | Duke Energy Carolinas | | | | | | | | | | | | | | FERC mitigation power sale agreements | | $ | (5) | | Discounted cash flow | | Forward electricity curves - price per MWh | | $ | 28.18 | - | 54.56 | | Progress Energy | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (26) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 4.13 | - | 4.54 | | FERC mitigation power sale agreements | | | (5) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.35 | - | 48.68 | | Duke Energy Progress | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (26) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 4.13 | - | 4.54 | | FERC mitigation power sale agreements | | | (5) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.35 | - | 48.68 | | Duke Energy Ohio | | | | | | | | | | | | | | Commodity power contracts | | $ | 25 | | Discounted cash flow | | Forward electricity curves - price per MWh | | $ | 28.40 | - | 61.35 | | Commodity natural gas contracts | | | (23) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | | 3.98 | - | 4.69 | | Reserves | | | (7) | | | | Bid-ask spreads, implied volatility, probability of default | | | | | | | Duke Energy Indiana | | | | | | | | | | | | | | Financial transmission rights (FTRs) | | $ | 4 | | RTO market pricing | | FTR price | | $ | (0.42) | $ | 12.72 | | | | | | | | | | | | | | | |
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| | | | | | | | | | | | | | | | | | | December 31, 2012 | | Investment Type | | Fair Value
(in millions) | | Valuation Technique | | Unobservable Input | | Range | | Duke Energy | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (53) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 2.33 | $ | 9.99 | | FERC mitigation power sale agreements | | | (23) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.83 | - | 48.69 | | Financial transmission rights (FTRs) | | | 11 | | RTO market pricing | | FTR price | | | 23.63 | - | 39.22 | | Commodity power contracts | | | (8) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 24.82 | - | 77.96 | | Commodity capacity contracts | | | (3) | | Discounted cash flow | | Forward capacity curves - price per MW day | | | 95.16 | - | 105.36 | | Commodity capacity option contracts | | | 3 | | Discounted cash flow | | Forward capacity option curves - price per MW day | | | 4.68 | - | 77.96 | | Reserves | | | (12) | | | | Bid-ask spreads, implied volatility, probability of default | | | | | | | Duke Energy Carolinas | | | | | | | | | | | | | | FERC mitigation power sale agreements | | $ | (12) | | Discounted cash flow | | Forward electricity curves - price per MWh | | $ | 25.83 | - | 48.69 | | Progress Energy | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (27) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 4.07 | - | 4.45 | | FERC mitigation power sale agreements | | | (11) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.83 | - | 48.69 | | Duke Energy Progress | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (27) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 4.07 | - | 4.45 | | FERC mitigation power sale agreements | | | (11) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.83 | - | 48.69 | | Duke Energy Ohio | | | | | | | | | | | | | | Financial transmission rights (FTRs) | | $ | 1 | | RTO market pricing | | FTR price | | $ | 27.17 | $ | 39.22 | | Commodity power contracts | | | (1) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.90 | - | 57.50 | | Commodity natural gas contracts | | | 5 | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | | 3.30 | - | 4.51 | | Reserves | | | (11) | | | | Bid-ask spreads, implied volatility, probability of default | | | | | | | Duke Energy Indiana | | | | | | | | | | | | | | Financial transmission rights (FTRs) | | $ | 10 | | RTO market pricing | | FTR price | | $ | 23.63 | $ | 35.43 |
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Progress Energy [Member]
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| Fair Value Disclosures [Line Items] |
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| Fair Value Measurement Amounts For Assets And Liabilities |
| | | | | | | | | | | | | | | | | | | March 31, 2013 | | (in millions) | | Total Fair Value | | Level 1 | | Level 2 | | Level 3 | | Nuclear decommissioning trust fund equity securities | | $ | 1,369 | | $ | 1,363 | | $ | 6 | | $ | ― | | Nuclear decommissioning trust fund debt securities and other | | | 648 | | | 177 | | | 471 | | | ― | | Other trading and available-for-sale debt securities and other(a) | | | 60 | | | 20 | | | 40 | | | ― | | Derivative assets(b) | | | 15 | | | ― | | | 15 | | | ― | | | Total assets | | | 2,092 | | | 1,560 | | | 532 | | | ― | | Derivative liabilities(c) | | | (269) | | | ― | | | (238) | | | (31) | | | Net assets | | $ | 1,823 | | $ | 1,560 | | $ | 294 | | $ | (31) |
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| | | | | | | | | | | | | | | | | | | December 31, 2012 | | (in millions) | | Total Fair Value | | Level 1 | | Level 2 | | Level 3 | | Nuclear decommissioning trust fund equity securities | | $ | 1,245 | | $ | 1,239 | | $ | 6 | | $ | ― | | Nuclear decommissioning trust fund debt securities and other | | | 643 | | | 162 | | | 481 | | | ― | | Other trading and available-for-sale debt securities and other(a) | | | 57 | | | 17 | | | 40 | | | ― | | Derivative assets(b) | | | 11 | | | ― | | | 11 | | | ― | | | Total assets | | | 1,956 | | | 1,418 | | | 538 | | | ― | | Derivative liabilities(c) | | | (440) | | | ― | | | (402) | | | (38) | | | Net assets | | $ | 1,516 | | $ | 1,418 | | $ | 136 | | $ | (38) | | | | | | | | | | | | | | | | | (a) | Included in Other within Investments and Other Assets in the Condensed Consolidated Balance Sheets. | | (b) | Included in Other Current Assets within Current Assets and Other within Investments and Other Assets in the Condensed Consolidated Balance Sheets. | | (c) | Included in Other within Current Liabilities and Other within Deferred Credits and Other Liabilities in the Condensed Consolidated Balance Sheets. |
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| Reconciliation Of Assets And Liabilities Measured At Fair Value On A Recurring Basis Using Unobservable Inputs |
| | | | | Three Months Ended March 31, 2013 | | (in millions) | | Derivatives (net) | | Balance at December 31, 2012 | | $ | (38) | | | Purchases, sales, issuances and settlements: | | | | | | | Issuances | | | 6 | | | Total gains included on the Condensed Consolidated Balance Sheet as regulatory asset or liability | | | 1 | | Balance at March 31, 2013 | | $ | (31) | | Pre-tax amounts included in the Condensed Consolidated Statements of Operations and Comprehensive Income related to Level 3 measurements outstanding at March 31, 2013 | | | | | | | Regulated electric | | $ | 6 | | Total | | $ | 6 | | | | | | | |
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| | | | | | | | | | | | Three Months Ended March 31, 2012 | | (in millions) | | Derivatives (net) | | Balance at December 31, 2011 | | $ | (24) | | | Total losses included on the Condensed Consolidated Balance Sheet as regulatory asset or liability | | | (3) | | Balance at March 31, 2012 | | $ | (27) |
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| Quantitative Information Table - Level 3 |
| | | | March 31, 2013 | | Investment Type | | Fair Value
(in millions) | | Valuation Technique | | Unobservable Input | | Range | | Duke Energy | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (85) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 2.84 | $ | 10.30 | | FERC mitigation power sale agreements | | | (10) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.35 | - | 54.56 | | Financial transmission rights (FTRs) | | | 4 | | RTO market pricing | | FTR price | | | (0.42) | - | 12.72 | | Commodity power contracts | | | 17 | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 28.40 | - | 81.60 | | Commodity capacity contracts | | | (3) | | Discounted cash flow | | Forward capacity curves - price per MW day | | | 95.16 | - | 122.64 | | Commodity capacity option contracts | | | 2 | | Discounted cash flow | | Forward capacity option curves - price per MW day | | | 31.15 | - | 81.60 | | Reserves | | | (7) | | | | Bid-ask spreads, implied volatility, probability of default | | | | | | | Duke Energy Carolinas | | | | | | | | | | | | | | FERC mitigation power sale agreements | | $ | (5) | | Discounted cash flow | | Forward electricity curves - price per MWh | | $ | 28.18 | - | 54.56 | | Progress Energy | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (26) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 4.13 | - | 4.54 | | FERC mitigation power sale agreements | | | (5) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.35 | - | 48.68 | | Duke Energy Progress | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (26) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 4.13 | - | 4.54 | | FERC mitigation power sale agreements | | | (5) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.35 | - | 48.68 | | Duke Energy Ohio | | | | | | | | | | | | | | Commodity power contracts | | $ | 25 | | Discounted cash flow | | Forward electricity curves - price per MWh | | $ | 28.40 | - | 61.35 | | Commodity natural gas contracts | | | (23) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | | 3.98 | - | 4.69 | | Reserves | | | (7) | | | | Bid-ask spreads, implied volatility, probability of default | | | | | | | Duke Energy Indiana | | | | | | | | | | | | | | Financial transmission rights (FTRs) | | $ | 4 | | RTO market pricing | | FTR price | | $ | (0.42) | $ | 12.72 | | | | | | | | | | | | | | | |
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| | | | | | | | | | | | | | | | | | | December 31, 2012 | | Investment Type | | Fair Value
(in millions) | | Valuation Technique | | Unobservable Input | | Range | | Duke Energy | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (53) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 2.33 | $ | 9.99 | | FERC mitigation power sale agreements | | | (23) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.83 | - | 48.69 | | Financial transmission rights (FTRs) | | | 11 | | RTO market pricing | | FTR price | | | 23.63 | - | 39.22 | | Commodity power contracts | | | (8) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 24.82 | - | 77.96 | | Commodity capacity contracts | | | (3) | | Discounted cash flow | | Forward capacity curves - price per MW day | | | 95.16 | - | 105.36 | | Commodity capacity option contracts | | | 3 | | Discounted cash flow | | Forward capacity option curves - price per MW day | | | 4.68 | - | 77.96 | | Reserves | | | (12) | | | | Bid-ask spreads, implied volatility, probability of default | | | | | | | Duke Energy Carolinas | | | | | | | | | | | | | | FERC mitigation power sale agreements | | $ | (12) | | Discounted cash flow | | Forward electricity curves - price per MWh | | $ | 25.83 | - | 48.69 | | Progress Energy | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (27) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 4.07 | - | 4.45 | | FERC mitigation power sale agreements | | | (11) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.83 | - | 48.69 | | Duke Energy Progress | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (27) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 4.07 | - | 4.45 | | FERC mitigation power sale agreements | | | (11) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.83 | - | 48.69 | | Duke Energy Ohio | | | | | | | | | | | | | | Financial transmission rights (FTRs) | | $ | 1 | | RTO market pricing | | FTR price | | $ | 27.17 | $ | 39.22 | | Commodity power contracts | | | (1) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.90 | - | 57.50 | | Commodity natural gas contracts | | | 5 | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | | 3.30 | - | 4.51 | | Reserves | | | (11) | | | | Bid-ask spreads, implied volatility, probability of default | | | | | | | Duke Energy Indiana | | | | | | | | | | | | | | Financial transmission rights (FTRs) | | $ | 10 | | RTO market pricing | | FTR price | | $ | 23.63 | $ | 35.43 |
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Duke Energy Progress [Member]
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| Fair Value Disclosures [Line Items] |
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| Fair Value Measurement Amounts For Assets And Liabilities |
| | | | | | | | | | | | | | | | | | | March 31, 2013 | | (in millions) | | Total Fair Value | | Level 1 | | Level 2 | | Level 3 | | Nuclear decommissioning trust fund equity securities | | $ | 894 | | $ | 894 | | $ | ― | | $ | ― | | Nuclear decommissioning trust fund debt securities and other | | | 453 | | | 123 | | | 330 | | | ― | | Other trading and available-for-sale debt securities and other(a) | | | 4 | | | 4 | | | ― | | | ― | | Derivative assets(b) | | | 5 | | | ― | | | 5 | | | ― | | | Total assets | | | 1,356 | | | 1,021 | | | 335 | | | ― | | Derivative liabilities(c) | | | (98) | | | ― | | | (67) | | | (31) | | | Net assets | | $ | 1,258 | | $ | 1,021 | | $ | 268 | | $ | (31) |
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| | | | | | | | | | | | | | | | | | | December 31, 2012 | | (in millions) | | Total Fair Value | | Level 1 | | Level 2 | | Level 3 | | Nuclear decommissioning trust fund equity securities | | $ | 811 | | $ | 811 | | $ | ― | | $ | ― | | Nuclear decommissioning trust fund debt securities and other | | | 448 | | | 119 | | | 329 | | | ― | | Other trading and available-for-sale debt securities and other(a) | | | 3 | | | 3 | | | ― | | | ― | | Derivative assets(b) | | | 2 | | | ― | | | 2 | | | ― | | | Total assets | | | 1,264 | | | 933 | | | 331 | | | ― | | Derivative liabilities(c) | | | (166) | | | ― | | | (128) | | | (38) | | | Net assets | | $ | 1,098 | | $ | 933 | | $ | 203 | | $ | (38) | | | | | | | | | | | | | | | | | (a) | Included in Other within Investments and Other Assets in the Condensed Consolidated Balance Sheets. | | (b) | Included in Other Current Assets within Current Assets and Other within Investments and Other Assets in the Condensed Consolidated Balance Sheets. | | (c) | Included in Other within Current Liabilities and Other within Deferred Credits and Other Liabilities in the Condensed Consolidated Balance Sheets |
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| Reconciliation Of Assets And Liabilities Measured At Fair Value On A Recurring Basis Using Unobservable Inputs |
| | | | | Three Months Ended March 31, 2013 | | (in millions) | | Derivatives (net) | | Balance at December 31, 2012 | | $ | (38) | | | Purchases, sales, issuances and settlements: | | | | | | | Issuances | | | 6 | | | Total gains included on the Condensed Consolidated Balance Sheet as regulatory asset or liability | | | 1 | | Balance at March 31, 2013 | | $ | (31) | | Pre-tax amounts included in the Condensed Consolidated Statements of Operations and Comprehensive Income related to Level 3 measurements outstanding at March 31, 2013 | | | | | | | Regulated electric | | $ | 6 | | Total | | $ | 6 | | | | | | | |
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| | | | | | | | | | | | Three Months Ended March 31, 2012 | | (in millions) | | Derivatives (net) | | Balance at December 31, 2011 | | $ | (24) | | | Total losses included on the Condensed Consolidated Balance Sheet as regulatory asset or liability | | | (3) | | Balance at March 31, 2012 | | $ | (27) |
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| Quantitative Information Table - Level 3 |
| | | | March 31, 2013 | | Investment Type | | Fair Value
(in millions) | | Valuation Technique | | Unobservable Input | | Range | | Duke Energy | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (85) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 2.84 | $ | 10.30 | | FERC mitigation power sale agreements | | | (10) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.35 | - | 54.56 | | Financial transmission rights (FTRs) | | | 4 | | RTO market pricing | | FTR price | | | (0.42) | - | 12.72 | | Commodity power contracts | | | 17 | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 28.40 | - | 81.60 | | Commodity capacity contracts | | | (3) | | Discounted cash flow | | Forward capacity curves - price per MW day | | | 95.16 | - | 122.64 | | Commodity capacity option contracts | | | 2 | | Discounted cash flow | | Forward capacity option curves - price per MW day | | | 31.15 | - | 81.60 | | Reserves | | | (7) | | | | Bid-ask spreads, implied volatility, probability of default | | | | | | | Duke Energy Carolinas | | | | | | | | | | | | | | FERC mitigation power sale agreements | | $ | (5) | | Discounted cash flow | | Forward electricity curves - price per MWh | | $ | 28.18 | - | 54.56 | | Progress Energy | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (26) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 4.13 | - | 4.54 | | FERC mitigation power sale agreements | | | (5) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.35 | - | 48.68 | | Duke Energy Progress | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (26) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 4.13 | - | 4.54 | | FERC mitigation power sale agreements | | | (5) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.35 | - | 48.68 | | Duke Energy Ohio | | | | | | | | | | | | | | Commodity power contracts | | $ | 25 | | Discounted cash flow | | Forward electricity curves - price per MWh | | $ | 28.40 | - | 61.35 | | Commodity natural gas contracts | | | (23) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | | 3.98 | - | 4.69 | | Reserves | | | (7) | | | | Bid-ask spreads, implied volatility, probability of default | | | | | | | Duke Energy Indiana | | | | | | | | | | | | | | Financial transmission rights (FTRs) | | $ | 4 | | RTO market pricing | | FTR price | | $ | (0.42) | $ | 12.72 | | | | | | | | | | | | | | | |
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| | | | | | | | | | | | | | | | | | | December 31, 2012 | | Investment Type | | Fair Value
(in millions) | | Valuation Technique | | Unobservable Input | | Range | | Duke Energy | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (53) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 2.33 | $ | 9.99 | | FERC mitigation power sale agreements | | | (23) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.83 | - | 48.69 | | Financial transmission rights (FTRs) | | | 11 | | RTO market pricing | | FTR price | | | 23.63 | - | 39.22 | | Commodity power contracts | | | (8) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 24.82 | - | 77.96 | | Commodity capacity contracts | | | (3) | | Discounted cash flow | | Forward capacity curves - price per MW day | | | 95.16 | - | 105.36 | | Commodity capacity option contracts | | | 3 | | Discounted cash flow | | Forward capacity option curves - price per MW day | | | 4.68 | - | 77.96 | | Reserves | | | (12) | | | | Bid-ask spreads, implied volatility, probability of default | | | | | | | Duke Energy Carolinas | | | | | | | | | | | | | | FERC mitigation power sale agreements | | $ | (12) | | Discounted cash flow | | Forward electricity curves - price per MWh | | $ | 25.83 | - | 48.69 | | Progress Energy | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (27) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 4.07 | - | 4.45 | | FERC mitigation power sale agreements | | | (11) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.83 | - | 48.69 | | Duke Energy Progress | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (27) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 4.07 | - | 4.45 | | FERC mitigation power sale agreements | | | (11) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.83 | - | 48.69 | | Duke Energy Ohio | | | | | | | | | | | | | | Financial transmission rights (FTRs) | | $ | 1 | | RTO market pricing | | FTR price | | $ | 27.17 | $ | 39.22 | | Commodity power contracts | | | (1) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.90 | - | 57.50 | | Commodity natural gas contracts | | | 5 | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | | 3.30 | - | 4.51 | | Reserves | | | (11) | | | | Bid-ask spreads, implied volatility, probability of default | | | | | | | Duke Energy Indiana | | | | | | | | | | | | | | Financial transmission rights (FTRs) | | $ | 10 | | RTO market pricing | | FTR price | | $ | 23.63 | $ | 35.43 |
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Duke Energy Florida [Member]
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| Fair Value Disclosures [Line Items] |
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| Fair Value Measurement Amounts For Assets And Liabilities |
| | | | | | | | | | | | | | | | | | | March 31, 2013 | | (in millions) | | Total Fair Value | | Level 1 | | Level 2 | | Level 3 | | Nuclear decommissioning trust fund equity securities | | $ | 474 | | $ | 468 | | $ | 6 | | $ | ― | | Nuclear decommissioning trust fund debt securities and other | | | 196 | | | 54 | | | 142 | | | ― | | Other trading and available-for-sale debt securities and other(a) | | | 45 | | | 5 | | | 40 | | | ― | | Derivative assets(b) | | | 10 | | | ― | | | 10 | | | ― | | | Total assets | | | 725 | | | 527 | | | 198 | | | ― | | Derivative liabilities(c) | | | (167) | | | ― | | | (167) | | | ― | | | Net assets | | $ | 558 | | $ | 527 | | $ | 31 | | $ | ― |
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| | | | | | | | | | | | | | | | | | | December 31, 2012 | | (in millions) | | Total Fair Value | | Level 1 | | Level 2 | | Level 3 | | Nuclear decommissioning trust fund equity securities | | $ | 435 | | $ | 429 | | $ | 6 | | $ | ― | | Nuclear decommissioning trust fund debt securities and other | | | 194 | | | 43 | | | 151 | | | ― | | Other trading and available-for-sale debt securities and other(a) | | | 43 | | | 3 | | | 40 | | | ― | | Derivative assets(b) | | | 9 | | | ― | | | 9 | | | ― | | | Total assets | | | 681 | | | 475 | | | 206 | | | ― | | Derivative liabilities(c) | | | (270) | | | ― | | | (270) | | | ― | | | Net assets (liabilities) | | $ | 411 | | $ | 475 | | $ | (64) | | $ | ― | | | | | | | | | | | | | | | | | (a) | Included in Other within Investments and Other Assets in the Condensed Balance Sheets. | | (b) | Included in Other Current Assets within Current Assets and Other within Investments and Other Assets in the Condensed Balance Sheets. | | (c) | Included in Other within Current Liabilities and Other within Deferred Credits and Other Liabilities in the Condensed Balance Sheets | | | | | | | | | | | | | | | |
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Duke Energy Ohio [Member]
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| Fair Value Disclosures [Line Items] |
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| Fair Value Measurement Amounts For Assets And Liabilities |
| | | | | | | | | | | | | | | | | | | March 31, 2013 | | (in millions) | | Total Fair Value | | Level 1 | | Level 2 | | Level 3 | | Derivative assets(a) | | $ | 19 | | $ | 8 | | $ | 2 | | $ | 9 | | Derivative liabilities(b) | | | (94) | | | (72) | | | (8) | | | (14) | | | Net liabilities | | $ | (75) | | $ | (64) | | $ | (6) | | $ | (5) | | | | | | | | | | | | | | | |
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| | | | | | | | | | | | | | | | | | | December 31, 2012 | | (in millions) | | Total Fair Value | | Level 1 | | Level 2 | | Level 3 | | Derivative assets(a) | | $ | 59 | | $ | 48 | | $ | 2 | | $ | 9 | | Derivative liabilities(b) | | | (38) | | | (15) | | | (8) | | | (15) | | | Net assets (liabilities) | | $ | 21 | | $ | 33 | | $ | (6) | | $ | (6) | | | | | | | | | | | | | | | | | (a) | Included in Other within Current Assets and Other within Investments and Other Assets in the Condensed Consolidated Balance Sheets. | | (b) | Included in Other within Current Liabilities and Other within Deferred Credits and Other Liabilities in the Condensed Consolidated Balance Sheets. |
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| Reconciliation Of Assets And Liabilities Measured At Fair Value On A Recurring Basis Using Unobservable Inputs |
| | | | | Three Months Ended March 31, 2013 | | (in millions) | | Derivatives (net) | | Balance at December 31, 2012 | | $ | (6) | | | Total pre-tax realized or unrealized gains (losses) included in earnings: | | | | | | | Revenue, nonregulated electric, natural gas, and other | | | 4 | | | Purchases, sales, issuances and settlements: | | | | | | | Settlements | | | (3) | | Balance at March 31, 2013 | | $ | (5) | | Pre-tax amounts included in the Condensed Consolidated Statements of Operations and Comprehensive Income related to Level 3 measurements outstanding at March 31, 2013: | | | | | | | Revenue, non-regulated electric and other | | $ | (2) | | Total | | $ | (2) | | | | | | | |
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| | | | | | | | | | | | Three Months Ended March 31, 2012 | | (in millions) | | Derivatives (net) | | Balance at December 31, 2011 | | $ | (3) | | | Total losses included on the Condensed Consolidated Balance Sheet as regulatory asset or liability | | | (1) | | Balance at March 31, 2012 | | $ | (4) | | Pre-tax amounts included in the Condensed Consolidated Statements of Operations and Comprehensive Income related to Level 3 measurements outstanding at March 31, 2012: | | | | | | | Revenue, non-regulated electric and other | | $ | 1 | | Total | | $ | 1 |
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| Quantitative Information Table - Level 3 |
| | | | March 31, 2013 | | Investment Type | | Fair Value
(in millions) | | Valuation Technique | | Unobservable Input | | Range | | Duke Energy | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (85) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 2.84 | $ | 10.30 | | FERC mitigation power sale agreements | | | (10) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.35 | - | 54.56 | | Financial transmission rights (FTRs) | | | 4 | | RTO market pricing | | FTR price | | | (0.42) | - | 12.72 | | Commodity power contracts | | | 17 | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 28.40 | - | 81.60 | | Commodity capacity contracts | | | (3) | | Discounted cash flow | | Forward capacity curves - price per MW day | | | 95.16 | - | 122.64 | | Commodity capacity option contracts | | | 2 | | Discounted cash flow | | Forward capacity option curves - price per MW day | | | 31.15 | - | 81.60 | | Reserves | | | (7) | | | | Bid-ask spreads, implied volatility, probability of default | | | | | | | Duke Energy Carolinas | | | | | | | | | | | | | | FERC mitigation power sale agreements | | $ | (5) | | Discounted cash flow | | Forward electricity curves - price per MWh | | $ | 28.18 | - | 54.56 | | Progress Energy | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (26) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 4.13 | - | 4.54 | | FERC mitigation power sale agreements | | | (5) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.35 | - | 48.68 | | Duke Energy Progress | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (26) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 4.13 | - | 4.54 | | FERC mitigation power sale agreements | | | (5) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.35 | - | 48.68 | | Duke Energy Ohio | | | | | | | | | | | | | | Commodity power contracts | | $ | 25 | | Discounted cash flow | | Forward electricity curves - price per MWh | | $ | 28.40 | - | 61.35 | | Commodity natural gas contracts | | | (23) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | | 3.98 | - | 4.69 | | Reserves | | | (7) | | | | Bid-ask spreads, implied volatility, probability of default | | | | | | | Duke Energy Indiana | | | | | | | | | | | | | | Financial transmission rights (FTRs) | | $ | 4 | | RTO market pricing | | FTR price | | $ | (0.42) | $ | 12.72 | | | | | | | | | | | | | | | |
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| | | | | | | | | | | | | | | | | | | December 31, 2012 | | Investment Type | | Fair Value
(in millions) | | Valuation Technique | | Unobservable Input | | Range | | Duke Energy | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (53) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 2.33 | $ | 9.99 | | FERC mitigation power sale agreements | | | (23) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.83 | - | 48.69 | | Financial transmission rights (FTRs) | | | 11 | | RTO market pricing | | FTR price | | | 23.63 | - | 39.22 | | Commodity power contracts | | | (8) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 24.82 | - | 77.96 | | Commodity capacity contracts | | | (3) | | Discounted cash flow | | Forward capacity curves - price per MW day | | | 95.16 | - | 105.36 | | Commodity capacity option contracts | | | 3 | | Discounted cash flow | | Forward capacity option curves - price per MW day | | | 4.68 | - | 77.96 | | Reserves | | | (12) | | | | Bid-ask spreads, implied volatility, probability of default | | | | | | | Duke Energy Carolinas | | | | | | | | | | | | | | FERC mitigation power sale agreements | | $ | (12) | | Discounted cash flow | | Forward electricity curves - price per MWh | | $ | 25.83 | - | 48.69 | | Progress Energy | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (27) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 4.07 | - | 4.45 | | FERC mitigation power sale agreements | | | (11) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.83 | - | 48.69 | | Duke Energy Progress | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (27) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 4.07 | - | 4.45 | | FERC mitigation power sale agreements | | | (11) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.83 | - | 48.69 | | Duke Energy Ohio | | | | | | | | | | | | | | Financial transmission rights (FTRs) | | $ | 1 | | RTO market pricing | | FTR price | | $ | 27.17 | $ | 39.22 | | Commodity power contracts | | | (1) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.90 | - | 57.50 | | Commodity natural gas contracts | | | 5 | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | | 3.30 | - | 4.51 | | Reserves | | | (11) | | | | Bid-ask spreads, implied volatility, probability of default | | | | | | | Duke Energy Indiana | | | | | | | | | | | | | | Financial transmission rights (FTRs) | | $ | 10 | | RTO market pricing | | FTR price | | $ | 23.63 | $ | 35.43 |
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Duke Energy Indiana [Member]
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| Fair Value Disclosures [Line Items] |
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| Fair Value Measurement Amounts For Assets And Liabilities |
| | | | | | | | | | | | | | | | | | | March 31, 2013 | | (in millions) | | Total Fair Value | | Level 1 | | Level 2 | | Level 3 | | Available-for-sale equity securities(a) | | $ | 54 | | $ | 54 | | $ | ― | | $ | ― | | Available-for-sale debt securities(a) | | | 29 | | | ― | | | 29 | | | ― | | Derivative assets(b) | | | 5 | | | 1 | | | ― | | | 4 | | | Total assets | | | 88 | | | 55 | | | 29 | | $ | 4 | | Derivative liabilities(c) | | | (55) | | | ― | | | (55) | | | ― | | | Net assets (liabilities) | | $ | 33 | | $ | 55 | | $ | (26) | | $ | 4 |
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| | | | | | | | | | | | | | | | | | | December 31, 2012 | | (in millions) | | Total Fair Value | | Level 1 | | Level 2 | | Level 3 | | Available-for-sale equity securities(a) | | $ | 49 | | $ | 49 | | $ | ― | | $ | ― | | Available-for-sale debt securities(a) | | | 29 | | | ― | | | 29 | | | ― | | Derivative assets(b) | | | 10 | | | ― | | | ― | | | 10 | | | Total assets | | | 88 | | | 49 | | | 29 | | $ | 10 | | Derivative liabilities(c) | | | (63) | | | ― | | | (63) | | | ― | | | Net assets (liabilities) | | $ | 25 | | $ | 49 | | $ | (34) | | $ | 10 | | | | | | | | | | | | | | | | | (a) | Included in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets. | | (b) | Included in Other within Current Assets on the Condensed Consolidated Balance Sheets. | | (c) | Included in Other within Current Liabilities and Other within Deferred Credits and Other Liabilities on the Condensed Consolidated Balance Sheets. |
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| Reconciliation Of Assets And Liabilities Measured At Fair Value On A Recurring Basis Using Unobservable Inputs |
| | | | | Three Months Ended March 31, 2013 | | (in millions) | Derivatives (net) | | Balance at December 31, 2012 | $ | 10 | | | Total pre-tax realized or unrealized gains (losses) included in earnings: | | | | | | Regulated electric | | | (5) | | | Total losses included on the Condensed Consolidated Balance Sheet as regulatory asset or liability | | (1) | | Balance at March 31, 2013 | $ | 4 | | | | | | | |
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| | | | | | | | | | | | Three Months Ended March 31, 2012 | | (in millions) | Derivatives (net) | | Balance at December 31, 2011 | | $ | 4 | | | Total pre-tax realized or unrealized gains (losses) included in earnings: | | | | | | Regulated electric | | | 8 | | | Purchases, sales, issuances and settlements: | | | | | | Settlements | | (10) | | | Total gains included on the Condensed Consolidated Balance Sheet as regulatory asset or liability | | 1 | | Balance at March 31, 2012 | $ | 3 |
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| Quantitative Information Table - Level 3 |
| | | | March 31, 2013 | | Investment Type | | Fair Value
(in millions) | | Valuation Technique | | Unobservable Input | | Range | | Duke Energy | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (85) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 2.84 | $ | 10.30 | | FERC mitigation power sale agreements | | | (10) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.35 | - | 54.56 | | Financial transmission rights (FTRs) | | | 4 | | RTO market pricing | | FTR price | | | (0.42) | - | 12.72 | | Commodity power contracts | | | 17 | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 28.40 | - | 81.60 | | Commodity capacity contracts | | | (3) | | Discounted cash flow | | Forward capacity curves - price per MW day | | | 95.16 | - | 122.64 | | Commodity capacity option contracts | | | 2 | | Discounted cash flow | | Forward capacity option curves - price per MW day | | | 31.15 | - | 81.60 | | Reserves | | | (7) | | | | Bid-ask spreads, implied volatility, probability of default | | | | | | | Duke Energy Carolinas | | | | | | | | | | | | | | FERC mitigation power sale agreements | | $ | (5) | | Discounted cash flow | | Forward electricity curves - price per MWh | | $ | 28.18 | - | 54.56 | | Progress Energy | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (26) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 4.13 | - | 4.54 | | FERC mitigation power sale agreements | | | (5) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.35 | - | 48.68 | | Duke Energy Progress | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (26) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 4.13 | - | 4.54 | | FERC mitigation power sale agreements | | | (5) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.35 | - | 48.68 | | Duke Energy Ohio | | | | | | | | | | | | | | Commodity power contracts | | $ | 25 | | Discounted cash flow | | Forward electricity curves - price per MWh | | $ | 28.40 | - | 61.35 | | Commodity natural gas contracts | | | (23) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | | 3.98 | - | 4.69 | | Reserves | | | (7) | | | | Bid-ask spreads, implied volatility, probability of default | | | | | | | Duke Energy Indiana | | | | | | | | | | | | | | Financial transmission rights (FTRs) | | $ | 4 | | RTO market pricing | | FTR price | | $ | (0.42) | $ | 12.72 | | | | | | | | | | | | | | | |
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| | | | | | | | | | | | | | | | | | | December 31, 2012 | | Investment Type | | Fair Value
(in millions) | | Valuation Technique | | Unobservable Input | | Range | | Duke Energy | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (53) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 2.33 | $ | 9.99 | | FERC mitigation power sale agreements | | | (23) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.83 | - | 48.69 | | Financial transmission rights (FTRs) | | | 11 | | RTO market pricing | | FTR price | | | 23.63 | - | 39.22 | | Commodity power contracts | | | (8) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 24.82 | - | 77.96 | | Commodity capacity contracts | | | (3) | | Discounted cash flow | | Forward capacity curves - price per MW day | | | 95.16 | - | 105.36 | | Commodity capacity option contracts | | | 3 | | Discounted cash flow | | Forward capacity option curves - price per MW day | | | 4.68 | - | 77.96 | | Reserves | | | (12) | | | | Bid-ask spreads, implied volatility, probability of default | | | | | | | Duke Energy Carolinas | | | | | | | | | | | | | | FERC mitigation power sale agreements | | $ | (12) | | Discounted cash flow | | Forward electricity curves - price per MWh | | $ | 25.83 | - | 48.69 | | Progress Energy | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (27) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 4.07 | - | 4.45 | | FERC mitigation power sale agreements | | | (11) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.83 | - | 48.69 | | Duke Energy Progress | | | | | | | | | | | | | | Commodity natural gas contracts | | $ | (27) | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | $ | 4.07 | - | 4.45 | | FERC mitigation power sale agreements | | | (11) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.83 | - | 48.69 | | Duke Energy Ohio | | | | | | | | | | | | | | Financial transmission rights (FTRs) | | $ | 1 | | RTO market pricing | | FTR price | | $ | 27.17 | $ | 39.22 | | Commodity power contracts | | | (1) | | Discounted cash flow | | Forward electricity curves - price per MWh | | | 25.90 | - | 57.50 | | Commodity natural gas contracts | | | 5 | | Discounted cash flow | | Forward natural gas curves - price per MMBtu | | | 3.30 | - | 4.51 | | Reserves | | | (11) | | | | Bid-ask spreads, implied volatility, probability of default | | | | | | | Duke Energy Indiana | | | | | | | | | | | | | | Financial transmission rights (FTRs) | | $ | 10 | | RTO market pricing | | FTR price | | $ | 23.63 | $ | 35.43 |
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