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Derivatives and Risk Management Activities - Commodity Price Risk Hedging (Details) bbl in Millions, Mcf in Millions, MWh in Millions | 6 Months Ended
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Jun. 30, 2016 MWh Mcf bbl
Net long position associated with crude oil purchases |
Commodity Price Risk Hedging: |
Derivative position notional amount (in barrels or Mcf) | 2.1
Net short time spread position hedging anticipated crude oil lease gathering purchases |
Commodity Price Risk Hedging: |
Derivative position notional amount (in barrels or Mcf) | 3.9
Crude oil grade spread positions |
Commodity Price Risk Hedging: |
Derivative position notional amount (in barrels or Mcf) | 7.0
Net short position related to anticipated sales of natural gas inventory |
Commodity Price Risk Hedging: |
Derivative position notional amount (in barrels or Mcf) | Mcf | 13.0
Net short position related to anticipated net sales of crude oil and NGL inventory |
Commodity Price Risk Hedging: |
Derivative position notional amount (in barrels or Mcf) | 25.8
PLA crude oil long call option position |
Commodity Price Risk Hedging: |
Derivative position notional amount (in barrels or Mcf) | 1.2
Long natural gas position for natural gas purchases |
Commodity Price Risk Hedging: |
Derivative position notional amount (in barrels or Mcf) | Mcf | 22.0
Short propane position related to subsequent sale of products |
Commodity Price Risk Hedging: |
Derivative position notional amount (in barrels or Mcf) | 4.2
Short butane position related to subsequent sale of products |
Commodity Price Risk Hedging: |
Derivative position notional amount (in barrels or Mcf) | 1.3
Short WTI position related to subsequent sale of products |
Commodity Price Risk Hedging: |
Derivative position notional amount (in barrels or Mcf) | 0.5
Long power position for power supply requirements |
Commodity Price Risk Hedging: |
Derivative position notional amount (in megawatt hours) | MWh | 0.3

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