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Risk Management Energy Commodity Price Risk Management (Details) (Hedge Funds, Equity Long (Short) [Member], Forward Contracts [Member])
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Mar. 31, 2014
MMBbls
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|---|---|
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Designated as Hedging Instrument [Member] | Crude Oil Fixed Price (MMBbl) [Member]
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| Derivative [Line Items] | |
| Net open position long/(short) | (24.0) |
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Designated as Hedging Instrument [Member] | Natural Gas Fixed Price (Bcf) [Member]
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| Derivative [Line Items] | |
| Net open position long/(short) | (23.0) |
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Designated as Hedging Instrument [Member] | Natural Gas Basis (Bcf) [Member]
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| Derivative [Line Items] | |
| Net open position long/(short) | (23.0) |
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Not Designated as Hedging Instrument [Member] | Crude Oil Fixed Price (MMBbl) [Member]
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| Derivative [Line Items] | |
| Net open position long/(short) | (0.7) |
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Not Designated as Hedging Instrument [Member] | Natural Gas Fixed Price (Bcf) [Member]
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| Derivative [Line Items] | |
| Net open position long/(short) | (13.1) |
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Not Designated as Hedging Instrument [Member] | Natural Gas Basis (Bcf) [Member]
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| Derivative [Line Items] | |
| Net open position long/(short) | (8.3) |
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Not Designated as Hedging Instrument [Member] | Crude Oil Basis (MMBbl) [Member]
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| Derivative [Line Items] | |
| Net open position long/(short) | (0.7) |
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Not Designated as Hedging Instrument [Member] | Natural Gas Liquids Fixed Price (MMBbl) [Member]
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| Derivative [Line Items] | |
| Net open position long/(short) | (1.0) |