XML 116 R97.htm IDEA: XBRL DOCUMENT v3.3.1.900
Energy Commodity Price Risk Managment (Details) - Energy Related Derivative [Member] - Forward Contracts [Member]
Dec. 31, 2015
MMBbls
Bcf
Designated as Hedging Instrument [Member] | Crude Oil Fixed Price [Member]  
Derivative [Line Items]  
Derivative, Nonmonetary Notional Amount (21.7)
Designated as Hedging Instrument [Member] | Crude Oil Basis [Member]  
Derivative [Line Items]  
Derivative, Nonmonetary Notional Amount (6.4)
Designated as Hedging Instrument [Member] | Natural Gas Fixed Price [Member]  
Derivative [Line Items]  
Derivative, Nonmonetary Notional Amount | Bcf (37.6)
Designated as Hedging Instrument [Member] | Natural Gas Basis [Member]  
Derivative [Line Items]  
Derivative, Nonmonetary Notional Amount | Bcf (30.1)
Not Designated as Hedging Instrument [Member] | Crude Oil Fixed Price [Member]  
Derivative [Line Items]  
Derivative, Nonmonetary Notional Amount (0.6)
Not Designated as Hedging Instrument [Member] | Crude Oil Basis [Member]  
Derivative [Line Items]  
Derivative, Nonmonetary Notional Amount (1.3)
Not Designated as Hedging Instrument [Member] | Natural Gas Fixed Price [Member]  
Derivative [Line Items]  
Derivative, Nonmonetary Notional Amount | Bcf (14.3)
Not Designated as Hedging Instrument [Member] | Natural Gas Basis [Member]  
Derivative [Line Items]  
Derivative, Nonmonetary Notional Amount | Bcf (8.6)
Not Designated as Hedging Instrument [Member] | Natural Gas Liquids Fixed Price [Member]  
Derivative [Line Items]  
Derivative, Nonmonetary Notional Amount (1.9)