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NATURE OF BUSINESS, SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND OTHER - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions | 2 Months Ended | 10 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2020 | Oct. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Supplemental Cash Flow Information |  |  |  |
Cash paid for interest, net of amounts capitalized | $ (8) | $ (79) | $ (425) | $ (433)
Supplementary Disclosure of Noncash Investing and Financing Activities |  |  |  |
Successor common stock, Subscription Rights and Warrants issued pursuant to the Plan |  | (494) |  |
Successor common stock issued for the junior debtor-in-possession exit fee pursuant to the Plan |  | (12) |  |
Successor common stock and EHP Notes issued for acquisition of noncontrolling interest pursuant to the Plan |  | (561) |  |
Successor common stock issued for a backstop commitment premium pursuant to the Plan |  | $ (52) |  |
Warrant issued to a joint venture partner |  |  | $ (3) |
Common stock issued as part of the acquisition of Elk Hills unit |  |  |  | $ (51)

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- Definition Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4297-108586 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 17 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3367-108585 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585 + Details
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