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Risk Management Energy Commodity Price Risk Management (Details) - Energy commodity derivative contracts(a) | Jun. 30, 2016 MMBbls Bcf
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Crude oil fixed price | Derivatives designated as hedging contracts |
Derivative [Line Items] |
Derivative, Net Nonmonetary Notional Amounts | (21.2)
Crude oil fixed price | Derivatives not designated as hedging contracts |
Derivative [Line Items] |
Derivative, Net Nonmonetary Notional Amounts | (0.3)
Crude oil basis | Derivatives designated as hedging contracts |
Derivative [Line Items] |
Derivative, Net Nonmonetary Notional Amounts | (4.1)
Crude oil basis | Derivatives not designated as hedging contracts |
Derivative [Line Items] |
Derivative, Net Nonmonetary Notional Amounts | (0.4)
Natural gas fixed price | Derivatives designated as hedging contracts |
Derivative [Line Items] |
Derivative, Net Nonmonetary Notional Amounts | Bcf | (31.9)
Natural gas fixed price | Derivatives not designated as hedging contracts |
Derivative [Line Items] |
Derivative, Net Nonmonetary Notional Amounts | Bcf | (12.8)
Natural gas basis | Derivatives designated as hedging contracts |
Derivative [Line Items] |
Derivative, Net Nonmonetary Notional Amounts | Bcf | (21.8)
Natural gas basis | Derivatives not designated as hedging contracts |
Derivative [Line Items] |
Derivative, Net Nonmonetary Notional Amounts | Bcf | (2.6)
NGL and other fixed price | Derivatives not designated as hedging contracts |
Derivative [Line Items] |
Derivative, Net Nonmonetary Notional Amounts | (3.4)

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