Fair Value Measurements (Measured On A Nonrecurring Basis) (Details) - Management's Price Outlooks	3 Months Ended
Mar. 31, 2020 $ / bbl $ / MMBTU
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Management oil price outlook (usd per BBL) \| $ / bbl	42.84
Management gas price outlook (usd per million BTU) \| $ / MMBTU	2.49

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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