v2.4.0.8

Assets and Liabilities with Recurring Fair Value Measurements Quantitative Information about Level 3 Fair Value Measurements (Details) (USD $) | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Physical Power [Member] |  |
Quantitative Information about Level 3 fair Value Measurements [Line Items] |  |
Fair Value Inputs Quantitative Information Power | $ 7,000,000 | $ 11,000,000
Power Congestion Products [Member] |  |
Quantitative Information about Level 3 fair Value Measurements [Line Items] |  |
Fair Value Inputs Quantitative Information Power | 7,000,000 |
Minimum [Member] | Physical Power [Member] |  |
Quantitative Information about Level 3 fair Value Measurements [Line Items] |  |
Fair Value Inputs Quantitative Information Power | 28.92 | 23.75
Minimum [Member] | Power Congestion Products [Member] |  |
Quantitative Information about Level 3 fair Value Measurements [Line Items] |  |
Fair Value Inputs Quantitative Information Power | (8.79) |
Maximum [Member] | Physical Power [Member] |  |
Quantitative Information about Level 3 fair Value Measurements [Line Items] |  |
Fair Value Inputs Quantitative Information Power | 53.15 | 53.82
Maximum [Member] | Power Congestion Products [Member] |  |
Quantitative Information about Level 3 fair Value Measurements [Line Items] |  |
Fair Value Inputs Quantitative Information Power | $ 11.53 |

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- Definition Fair Value Inputs Quantitative Information Power + References No definition available. + Details
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Namespace Prefix: | cpn_
Data Type: | xbrli:monetaryItemType
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- Details
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Namespace Prefix: | cpn_
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