Financial Instruments - Schedule of volumes associated with derivative contracts (Details)	1 Months Ended
Oct. 27, 2015 MBbls
Derivatives not designated as accounting hedges \| Lls Vs Brent [Member] \| Basis Swaps \| 2017 Volumes \| Subsequent event
Financial Instruments
Nonmonetary notional amount (in MBbls)	365

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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