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Condensed Consolidating Financial Information - Statements of Cash Flows (Details) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2019 | Jun. 30, 2018
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |
Net Cash Provided By Operating Activities | $ 853 | $ 951 | [1]
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Drilling and completion costs | (1,070) | (928) | [1]
Business combination, net | (353) | 0 | [1]
Acquisitions of proved and unproved properties | (17) | (102) | [1]
Proceeds from divestitures of proved and unproved properties | 82 | 384 | [1]
Additions to other property and equipment | (18) | (5) | [1]
Other investing activities | 4 | 148 |
Net Cash Used In Investing Activities | (1,372) | (503) | [1]
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from revolving credit facility borrowings | 6,416 | 6,118 | [1]
Payments on revolving credit facility borrowings | (5,452) | (6,393) | [1]
Cash paid to purchase debt | (381) | 0 | [1]
Cash paid for preferred stock dividends | (46) | (46) | [1]
Other financing activities | (18) | (129) |
Intercompany advances, net | 0 | 0 |
Net Cash Provided By (Used In) Financing Activities | 519 | (450) | [1]
Net decrease in cash and cash equivalents | 0 | (2) | [1]
Cash and cash equivalents, beginning of period | 4 | 5 | [1]
Cash and cash equivalents, end of period | 4 | 3 | [1]
Eliminations |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |
Net Cash Provided By Operating Activities | (2) | (8) |
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Drilling and completion costs | 0 | 0 |
Business combination, net | 0 |  |
Acquisitions of proved and unproved properties | 0 | 0 |
Proceeds from divestitures of proved and unproved properties | 0 | 0 |
Additions to other property and equipment | 0 | 0 |
Other investing activities | 0 | 0 |
Net Cash Used In Investing Activities | 0 | 0 |
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from revolving credit facility borrowings | 0 | 0 |
Payments on revolving credit facility borrowings | 0 | 0 |
Cash paid to purchase debt | 0 |  |
Cash paid for preferred stock dividends | 0 | 0 |
Other financing activities | 2 | 6 |
Intercompany advances, net | 0 | 0 |
Net Cash Provided By (Used In) Financing Activities | 2 | 6 |
Net decrease in cash and cash equivalents | 0 | (2) |
Cash and cash equivalents, beginning of period | (2) | (3) |
Cash and cash equivalents, end of period | (2) | (5) |
Parent | Reportable legal entities |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |
Net Cash Provided By Operating Activities | 0 | 88 |
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Drilling and completion costs | 0 | 0 |
Business combination, net | 0 |  |
Acquisitions of proved and unproved properties | 0 | 0 |
Proceeds from divestitures of proved and unproved properties | 0 | 0 |
Additions to other property and equipment | 0 | 0 |
Other investing activities | 0 | 0 |
Net Cash Used In Investing Activities | 0 | 0 |
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from revolving credit facility borrowings | 6,119 | 6,118 |
Payments on revolving credit facility borrowings | (5,166) | (6,393) |
Cash paid to purchase debt | (381) |  |
Cash paid for preferred stock dividends | (46) | (46) |
Other financing activities | (12) | (2) |
Intercompany advances, net | (515) | 235 |
Net Cash Provided By (Used In) Financing Activities | (1) | (88) |
Net decrease in cash and cash equivalents | (1) | 0 |
Cash and cash equivalents, beginning of period | 4 | 5 |
Cash and cash equivalents, end of period | 3 | 5 |
Guarantor Subsidiaries | Reportable legal entities |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |
Net Cash Provided By Operating Activities | 613 | 866 |
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Drilling and completion costs | (805) | (928) |
Business combination, net | (381) |  |
Acquisitions of proved and unproved properties | (17) | (102) |
Proceeds from divestitures of proved and unproved properties | 82 | 384 |
Additions to other property and equipment | (7) | (5) |
Other investing activities | 4 | 148 |
Net Cash Used In Investing Activities | (1,124) | (503) |
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from revolving credit facility borrowings | 0 | 0 |
Payments on revolving credit facility borrowings | 0 | 0 |
Cash paid to purchase debt | 0 |  |
Cash paid for preferred stock dividends | 0 | 0 |
Other financing activities | (4) | (126) |
Intercompany advances, net | 515 | (237) |
Net Cash Provided By (Used In) Financing Activities | 511 | (363) |
Net decrease in cash and cash equivalents | 0 | 0 |
Cash and cash equivalents, beginning of period | 1 | 1 |
Cash and cash equivalents, end of period | 1 | 1 |
Non-Guarantor Subsidiaries | Reportable legal entities |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |
Net Cash Provided By Operating Activities | 242 | 5 |
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Drilling and completion costs | (265) | 0 |
Business combination, net | 28 |  |
Acquisitions of proved and unproved properties | 0 | 0 |
Proceeds from divestitures of proved and unproved properties | 0 | 0 |
Additions to other property and equipment | (11) | 0 |
Other investing activities | 0 | 0 |
Net Cash Used In Investing Activities | (248) | 0 |
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from revolving credit facility borrowings | 297 | 0 |
Payments on revolving credit facility borrowings | (286) | 0 |
Cash paid to purchase debt | 0 |  |
Cash paid for preferred stock dividends | 0 | 0 |
Other financing activities | (4) | (7) |
Intercompany advances, net | 0 | 2 |
Net Cash Provided By (Used In) Financing Activities | 7 | (5) |
Net decrease in cash and cash equivalents | 1 | 0 |
Cash and cash equivalents, beginning of period | 1 | 2 |
Cash and cash equivalents, end of period | $ 2 | $ 2 |
[1] | Financial information for 2018 has been recast to reflect the retrospective application of the successful efforts method of accounting. See Note 1.

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