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Condensed Consolidating Financial Information - Condensed Consolidating Statement of Cash Flows (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |
Net Cash Provided By (Used In) Operating Activities | $ 1,623 | $ 1,730 | $ 475
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Drilling and completion costs | (2,180) | (1,848) | (2,113)
Business combination, net | (353) | 0 | 0
Acquisitions of proved and unproved properties | (35) | (128) | (88)
Proceeds from divestitures of proved and unproved properties | 130 | 2,231 | 1,249
Additions to other property and equipment | (48) | (21) | (21)
Proceeds from sales of other property and equipment | 6 | 147 | 55
Proceeds from sales of investments | 0 | 74 | 0
Other investing activities |  |  | 55
Net Cash Provided By (Used In) Investing Activities | (2,480) | 455 | (918)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from revolving credit facility borrowings | 10,676 | 11,697 | 7,771
Payments on revolving credit facility borrowings | (10,180) | (12,059) | (6,990)
Proceeds from issuance of senior notes, net | 108 | 1,236 | 1,585
Proceeds from issuance of term loan, net | 1,455 | 0 | 0
Cash paid to purchase debt | (1,073) | (2,813) | (2,592)
Cash paid for preferred stock dividends | (91) | (92) | (183)
Contribution from parent | 0 |  |
Other financing activities | (36) | (155) | (25)
Intercompany advances, net | 0 | 0 | 0
Net Cash Provided By (Used In) Financing Activities | 859 | (2,186) | (434)
Net increase (decrease) in cash and cash equivalents | 2 | (1) | (877)
Cash and cash equivalents, beginning of period | 4 | 5 | 882
Cash and cash equivalents, end of period | 6 | 4 | 5
Eliminations |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |
Net Cash Provided By (Used In) Operating Activities | (4) | (7) | (10)
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Drilling and completion costs | 0 | 0 | 0
Business combination, net | 0 |  |
Acquisitions of proved and unproved properties | 0 | 0 | 0
Proceeds from divestitures of proved and unproved properties | 0 | 0 | 0
Additions to other property and equipment | 0 | 0 | 0
Proceeds from sales of other property and equipment | 0 | 0 |
Proceeds from sales of investments |  | 0 |
Other investing activities |  |  | 0
Net Cash Provided By (Used In) Investing Activities | 0 | 0 | 0
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from revolving credit facility borrowings | 0 | 0 | 0
Payments on revolving credit facility borrowings | 0 | 0 | 0
Proceeds from issuance of senior notes, net | 0 | 0 | 0
Proceeds from issuance of term loan, net | 0 |  |
Cash paid to purchase debt | 0 | 0 | 0
Cash paid for preferred stock dividends | 0 | 0 | 0
Contribution from parent | 0 |  |
Other financing activities | 4 | 7 | 32
Intercompany advances, net | 0 | 1 | 0
Net Cash Provided By (Used In) Financing Activities | 4 | 8 | 32
Net increase (decrease) in cash and cash equivalents | 0 | 1 | 22
Cash and cash equivalents, beginning of period | (2) | (3) | (25)
Cash and cash equivalents, end of period | (2) | (2) | (3)
Parent | Reportable legal entities |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |
Net Cash Provided By (Used In) Operating Activities | 1 | 85 | 5
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Drilling and completion costs | 0 | 0 | 0
Business combination, net | 0 |  |
Acquisitions of proved and unproved properties | 0 | 0 | 0
Proceeds from divestitures of proved and unproved properties | 0 | 0 | 0
Additions to other property and equipment | 0 | 0 | 0
Proceeds from sales of other property and equipment | 0 | 0 |
Proceeds from sales of investments |  | 0 |
Other investing activities |  |  | 0
Net Cash Provided By (Used In) Investing Activities | 0 | 0 | 0
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from revolving credit facility borrowings | 9,839 | 11,697 | 7,771
Payments on revolving credit facility borrowings | (8,668) | (12,059) | (6,990)
Proceeds from issuance of senior notes, net | 108 | 1,236 | 1,585
Proceeds from issuance of term loan, net | 1,455 |  |
Cash paid to purchase debt | (380) | (2,813) | (2,592)
Cash paid for preferred stock dividends | (91) | (92) | (183)
Contribution from parent | (1,644) |  |
Other financing activities | (24) | (26) | (39)
Intercompany advances, net | (713) | 1,971 | (456)
Net Cash Provided By (Used In) Financing Activities | (118) | (86) | (904)
Net increase (decrease) in cash and cash equivalents | (117) | (1) | (899)
Cash and cash equivalents, beginning of period | 4 | 5 | 904
Cash and cash equivalents, end of period | (113) | 4 | 5
Guarantor Subsidiaries | Reportable legal entities |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |
Net Cash Provided By (Used In) Operating Activities | 1,270 | 1,642 | 466
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Drilling and completion costs | (1,548) | (1,848) | (2,113)
Business combination, net | (381) |  |
Acquisitions of proved and unproved properties | (35) | (128) | (88)
Proceeds from divestitures of proved and unproved properties | 130 | 2,231 | 1,249
Additions to other property and equipment | (32) | (21) | (21)
Proceeds from sales of other property and equipment | 6 | 147 |
Proceeds from sales of investments |  | 74 |
Other investing activities |  |  | 55
Net Cash Provided By (Used In) Investing Activities | (1,860) | 455 | (918)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from revolving credit facility borrowings | 0 | 0 | 0
Payments on revolving credit facility borrowings | 0 | 0 | 0
Proceeds from issuance of senior notes, net | 0 | 0 | 0
Proceeds from issuance of term loan, net | 0 |  |
Cash paid to purchase debt | 0 | 0 | 0
Cash paid for preferred stock dividends | 0 | 0 | 0
Contribution from parent | 0 |  |
Other financing activities | (8) | (123) | (5)
Intercompany advances, net | 713 | (1,974) | 456
Net Cash Provided By (Used In) Financing Activities | 705 | (2,097) | 451
Net increase (decrease) in cash and cash equivalents | 115 | 0 | (1)
Cash and cash equivalents, beginning of period | 1 | 1 | 2
Cash and cash equivalents, end of period | 116 | 1 | 1
Non-Guarantor Subsidiaries | Reportable legal entities |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |
Net Cash Provided By (Used In) Operating Activities | 356 | 10 | 14
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Drilling and completion costs | (632) | 0 | 0
Business combination, net | 28 |  |
Acquisitions of proved and unproved properties | 0 | 0 | 0
Proceeds from divestitures of proved and unproved properties | 0 | 0 | 0
Additions to other property and equipment | (16) | 0 | 0
Proceeds from sales of other property and equipment | 0 | 0 |
Proceeds from sales of investments |  | 0 |
Other investing activities |  |  | 0
Net Cash Provided By (Used In) Investing Activities | (620) | 0 | 0
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from revolving credit facility borrowings | 837 | 0 | 0
Payments on revolving credit facility borrowings | (1,512) | 0 | 0
Proceeds from issuance of senior notes, net | 0 | 0 | 0
Proceeds from issuance of term loan, net | 0 |  |
Cash paid to purchase debt | (693) | 0 | 0
Cash paid for preferred stock dividends | 0 | 0 | 0
Contribution from parent | 1,644 |  |
Other financing activities | (8) | (13) | (13)
Intercompany advances, net | 0 | 2 | 0
Net Cash Provided By (Used In) Financing Activities | 268 | (11) | (13)
Net increase (decrease) in cash and cash equivalents | 4 | (1) | 1
Cash and cash equivalents, beginning of period | 1 | 2 | 1
Cash and cash equivalents, end of period | $ 5 | $ 1 | $ 2

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