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DERIVATIVES - BSP JV (Details) - Purchased	Sep. 30, 2018 bbl / d $ / bbl
Puts | 2018 through 2021
Derivatives
Weighted-average price (in dollars per barrel) | $ / bbl	50.00
BSP JV | Calls | 2018 through 2020
Derivatives
Daily Volume (in Bbl) | bbl / d	1,000
Weighted-average price (in dollars per barrel) | $ / bbl	60.00
BSP JV | Puts | 2018 through 2021
Derivatives
Daily Volume (in Bbl) | bbl / d	2,000

X

- Definition

Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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- Definition

The average strike price on the group of price risk option contracts such as put options or call options.

+ References

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- Definition

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+ References

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