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NATURE OF BUSINESS, SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND OTHER - Other Current Assets (Details) - USD ($) | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Other current assets |  |
Amounts due from joint interest partners, net | $ 42,000,000 | $ 70,000,000
Derivative assets | 0 | 39,000,000
Prepaid expenses | 20,000,000 | 19,000,000
Other | 1,000,000 | 2,000,000
Other current assets, net | 63,000,000 | 130,000,000
Allowance for credit losses | $ 0 | $ 19,000,000

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