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Barrels of oil discharged into the Gulf of Mexico used for purposes of calculating the maximum possible civil penalty under the Clean Water Act, as determined by the U.S. District Court in New Orleans, Louisiana.

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Non-operating leasehold interest ownership percentage.

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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.

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Amount of loss contingency liability.

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Amount of loss contingency liability expected to be resolved within one year or the normal operating cycle, if longer.

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Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

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The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates.

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