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Condensed Combined Debtor-in-Possession Financial Information - Condensed Consolidating Statement of Cash Flows (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |
Net Cash Provided By (Used In) Operating Activities | $ 1,164 | $ 1,623 | $ 1,730
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Drilling and completion costs | (1,111) | (2,180) | (1,848)
Business combination, net | 0 | (353) | 0
Acquisitions of proved and unproved properties | (9) | (35) | (128)
Proceeds from divestitures of proved and unproved properties | 136 | 130 | 2,231
Additions to other property and equipment | (22) | (48) | (21)
Proceeds from sales of other property and equipment | 14 | 6 | 147
Proceeds from sales of investments | 0 | 0 | 74
Net Cash Provided By (Used In) Investing Activities | (992) | (2,480) | 455
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from pre-petition revolving credit facility borrowings | 3,656 | 10,676 | 11,697
Payments on pre-petition revolving credit facility borrowings | (3,317) | (10,180) | (12,059)
Proceeds from DIP credit facility borrowings | 60 | 0 | 0
Payments on DIP credit facility borrowings | (60) | 0 | 0
DIP credit facility and exit facilities financing costs | (109) | 0 | 0
Proceeds from issuance of term loan, net | 0 | 1,455 | 0
Cash paid to purchase debt | (94) | (1,073) | (2,813)
Cash paid for preferred stock dividends | (22) | (91) | (92)
Other financing activities | (13) | (36) | (33)
Net Cash Provided By (Used In) Financing Activities | 101 | 859 | (2,186)
Net increase (decrease) in cash and cash equivalents | 273 | 2 | (1)
Cash and cash equivalents, beginning of period | 6 | 4 | 5
Cash and cash equivalents, end of period | 279 | 6 | 4
Debtor-in-Possession |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |
Net Cash Provided By (Used In) Operating Activities | 1,163 | 1,618 | 1,727
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Drilling and completion costs | (1,111) | (2,180) | (1,848)
Business combination, net | 0 | (353) | 0
Acquisitions of proved and unproved properties | (9) | (35) | (128)
Proceeds from divestitures of proved and unproved properties | 136 | 130 | 2,231
Additions to other property and equipment | (22) | (48) | (21)
Proceeds from sales of other property and equipment | 14 | 6 | 147
Proceeds from sales of investments | 0 | 0 | 74
Net Cash Provided By (Used In) Investing Activities | (992) | (2,480) | 455
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from pre-petition revolving credit facility borrowings | 3,656 | 10,676 | 11,697
Payments on pre-petition revolving credit facility borrowings | (3,317) | (10,180) | (12,059)
Proceeds from DIP credit facility borrowings | 60 | 0 | 0
Payments on DIP credit facility borrowings | (60) | 0 | 0
DIP credit facility and exit facilities financing costs | (109) |  |
Proceeds from issuance of senior notes, net | 0 | 108 | 1,236
Proceeds from issuance of term loan, net | 0 | 1,455 | 0
Cash paid to purchase debt | (94) | (1,073) | (2,813)
Cash paid for preferred stock dividends | (22) | (91) | (92)
Other financing activities | (11) | (32) | (149)
Intercompany advances, net | 0 | 0 | (2)
Net Cash Provided By (Used In) Financing Activities | 103 | 863 | (2,182)
Net increase (decrease) in cash and cash equivalents | 274 | 1 | 0
Cash and cash equivalents, beginning of period | 4 | 3 | 3
Cash and cash equivalents, end of period | $ 278 | $ 4 | $ 3

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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 + Details
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- Definition The cash outflow to purchase long lived physical asset for use in the normal oil and gas operations and to purchase mineral interests in oil and gas properties not intended for resale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 + Details
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