|
Fair Value Of Financial Assets And Liabilities (Quantitative Level 3 Fair Value Disclosure) (Details) (USD $)
In Millions, unless otherwise specified
|
3 Months Ended |
12 Months Ended |
|
Mar. 31, 2013
|
Dec. 31, 2012
|
|
Commodity Natural Gas Hedges [Member] | Discounted Cash Flow [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative Financial Instruments Liabilities Fair Value Disclosure |
$ (85) |
$ (53) |
|
Commodity Natural Gas Hedges [Member] | Discounted Cash Flow [Member] | Maximum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair Value Inputs Price Per MMBtu |
10.30 |
9.99 |
|
Commodity Natural Gas Hedges [Member] | Discounted Cash Flow [Member] | Minimum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair Value Inputs Price Per MMBtu |
2.84 |
2.33 |
|
FERC Mitigation Power Sale Agreements [Member] | Discounted Cash Flow [Member]
|
|
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative Financial Instruments Liabilities Fair Value Disclosure |
(10) |
(23) |
|
FERC Mitigation Power Sale Agreements [Member] | Discounted Cash Flow [Member] | Maximum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair value inputs, price per MWh |
54.56 |
48.69 |
|
FERC Mitigation Power Sale Agreements [Member] | Discounted Cash Flow [Member] | Minimum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair value inputs, price per MWh |
25.35 |
25.83 |
|
Financial Transmission Rights [Member] | RTO Market Pricing [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative Financial Instruments Liabilities Fair Value Disclosure |
4 |
11 |
|
Financial Transmission Rights [Member] | RTO Market Pricing [Member] | Maximum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair value inputs, price FTR |
12.72 |
39.22 |
|
Financial Transmission Rights [Member] | RTO Market Pricing [Member] | Minimum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair value inputs, price FTR |
(0.42) |
23.63 |
|
Commodity Power Contracts [Member] | Discounted Cash Flow [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative Financial Instruments Liabilities Fair Value Disclosure |
17 |
(8) |
|
Commodity Power Contracts [Member] | Discounted Cash Flow [Member] | Maximum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair value inputs, price per MWh |
81.60 |
77.96 |
|
Commodity Power Contracts [Member] | Discounted Cash Flow [Member] | Minimum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair value inputs, price per MWh |
28.40 |
24.82 |
|
Commodity Capacity Contracts [Member] | Discounted Cash Flow [Member]
|
|
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative Financial Instruments Liabilities Fair Value Disclosure |
(3) |
(3) |
|
Commodity Capacity Contracts [Member] | Discounted Cash Flow [Member] | Maximum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair Value Inputs Price Per Mwd |
122.64 |
105.36 |
|
Commodity Capacity Contracts [Member] | Discounted Cash Flow [Member] | Minimum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair Value Inputs Price Per Mwd |
95.16 |
95.16 |
|
Commodity Capacity Option Contracts [Member]
|
|
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative Financial Instruments Liabilities Fair Value Disclosure |
2 |
|
|
Commodity Capacity Option Contracts [Member] | Discounted Cash Flow [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative Financial Instruments Liabilities Fair Value Disclosure |
|
3 |
|
Commodity Capacity Option Contracts [Member] | Discounted Cash Flow [Member] | Maximum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair Value Inputs Price Per Mwd |
81.60 |
77.96 |
|
Commodity Capacity Option Contracts [Member] | Discounted Cash Flow [Member] | Minimum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair Value Inputs Price Per Mwd |
31.15 |
4.68 |
|
Derivative Financial Instruments Liabilities Reserves [Member]
|
|
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative Financial Instruments Liabilities Fair Value Disclosure |
(7) |
(12) |
|
Duke Energy Carolinas [Member] | FERC Mitigation Power Sale Agreements [Member] | Discounted Cash Flow [Member]
|
|
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative Financial Instruments Liabilities Fair Value Disclosure |
(5) |
(12) |
|
Duke Energy Carolinas [Member] | FERC Mitigation Power Sale Agreements [Member] | Discounted Cash Flow [Member] | Maximum [Member]
|
|
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair value inputs, price per MWh |
54.56 |
48.69 |
|
Duke Energy Carolinas [Member] | FERC Mitigation Power Sale Agreements [Member] | Discounted Cash Flow [Member] | Minimum [Member]
|
|
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair value inputs, price per MWh |
28.18 |
25.83 |
|
Progress Energy [Member] | Commodity Natural Gas Hedges [Member] | Discounted Cash Flow [Member]
|
|
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative Financial Instruments Liabilities Fair Value Disclosure |
(26) |
(27) |
|
Progress Energy [Member] | Commodity Natural Gas Hedges [Member] | Discounted Cash Flow [Member] | Maximum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair Value Inputs Price Per MMBtu |
4.54 |
4.45 |
|
Progress Energy [Member] | Commodity Natural Gas Hedges [Member] | Discounted Cash Flow [Member] | Minimum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair Value Inputs Price Per MMBtu |
4.13 |
4.07 |
|
Progress Energy [Member] | FERC Mitigation Power Sale Agreements [Member] | Discounted Cash Flow [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative Financial Instruments Liabilities Fair Value Disclosure |
(5) |
(11) |
|
Progress Energy [Member] | FERC Mitigation Power Sale Agreements [Member] | Discounted Cash Flow [Member] | Maximum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair value inputs, price per MWh |
48.68 |
48.69 |
|
Progress Energy [Member] | FERC Mitigation Power Sale Agreements [Member] | Discounted Cash Flow [Member] | Minimum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair value inputs, price per MWh |
25.35 |
25.83 |
|
Duke Energy Progress [Member] | Commodity Natural Gas Hedges [Member] | Discounted Cash Flow [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative Financial Instruments Liabilities Fair Value Disclosure |
(26) |
(27) |
|
Duke Energy Progress [Member] | Commodity Natural Gas Hedges [Member] | Discounted Cash Flow [Member] | Maximum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair Value Inputs Price Per MMBtu |
4.54 |
4.45 |
|
Duke Energy Progress [Member] | Commodity Natural Gas Hedges [Member] | Discounted Cash Flow [Member] | Minimum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair Value Inputs Price Per MMBtu |
4.13 |
4.07 |
|
Duke Energy Progress [Member] | FERC Mitigation Power Sale Agreements [Member] | Discounted Cash Flow [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative Financial Instruments Liabilities Fair Value Disclosure |
(5) |
(11) |
|
Duke Energy Progress [Member] | FERC Mitigation Power Sale Agreements [Member] | Discounted Cash Flow [Member] | Maximum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair value inputs, price per MWh |
48.68 |
48.69 |
|
Duke Energy Progress [Member] | FERC Mitigation Power Sale Agreements [Member] | Discounted Cash Flow [Member] | Minimum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair value inputs, price per MWh |
25.35 |
25.83 |
|
Duke Energy Ohio [Member] | Commodity Natural Gas Hedges [Member] | Discounted Cash Flow [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative Financial Instruments Liabilities Fair Value Disclosure |
(23) |
5 |
|
Duke Energy Ohio [Member] | Commodity Natural Gas Hedges [Member] | Discounted Cash Flow [Member] | Maximum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair Value Inputs Price Per MMBtu |
4.69 |
4.51 |
|
Duke Energy Ohio [Member] | Commodity Natural Gas Hedges [Member] | Discounted Cash Flow [Member] | Minimum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair Value Inputs Price Per MMBtu |
3.98 |
3.30 |
|
Duke Energy Ohio [Member] | Financial Transmission Rights [Member] | RTO Market Pricing [Member]
|
|
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative Financial Instruments Liabilities Fair Value Disclosure |
|
1 |
|
Duke Energy Ohio [Member] | Financial Transmission Rights [Member] | RTO Market Pricing [Member] | Maximum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair value inputs, price FTR |
|
39.22 |
|
Duke Energy Ohio [Member] | Financial Transmission Rights [Member] | RTO Market Pricing [Member] | Minimum [Member]
|
|
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair value inputs, price FTR |
|
27.17 |
|
Duke Energy Ohio [Member] | Commodity Power Contracts [Member] | Discounted Cash Flow [Member]
|
|
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative Financial Instruments Liabilities Fair Value Disclosure |
25 |
(1) |
|
Duke Energy Ohio [Member] | Commodity Power Contracts [Member] | Discounted Cash Flow [Member] | Maximum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair value inputs, price per MWh |
61.35 |
57.50 |
|
Duke Energy Ohio [Member] | Commodity Power Contracts [Member] | Discounted Cash Flow [Member] | Minimum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair value inputs, price per MWh |
28.40 |
25.90 |
|
Duke Energy Ohio [Member] | Derivative Financial Instruments Liabilities Reserves [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative Financial Instruments Liabilities Fair Value Disclosure |
(7) |
(11) |
|
Duke Energy Indiana [Member] | Financial Transmission Rights [Member] | RTO Market Pricing [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Derivative Financial Instruments Liabilities Fair Value Disclosure |
$ 4 |
$ 10 |
|
Duke Energy Indiana [Member] | Financial Transmission Rights [Member] | RTO Market Pricing [Member] | Maximum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair value inputs, price FTR |
12.72 |
35.43 |
|
Duke Energy Indiana [Member] | Financial Transmission Rights [Member] | RTO Market Pricing [Member] | Minimum [Member]
|
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
| Fair value inputs, price FTR |
(0.42) |
23.63 |