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Condensed Consolidating Financial Information Statements of Cash Flows Tables (Details) - USD ($) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2018 | Sep. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES: |  |
Net Cash Provided By Operating Activities | $ 1,595 | $ 273
CASH FLOWS FROM INVESTING ACTIVITIES: |  |
Drilling and completion costs | (1,481) | (1,597)
Acquisitions of proved and unproved properties | (244) | (226)
Proceeds from divestitures of proved and unproved properties | 395 | 1,193
Additions to other property and equipment | (11) | (12)
Other investing activities | 149 | 40
Net Cash Used In Investing Activities | (1,192) | (602)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Proceeds from revolving credit facility borrowings | 9,095 | 4,775
Payments on revolving credit facility borrowings | (9,231) | (4,130)
Proceeds from issuance of senior notes, net | 1,237 | 742
Cash paid to purchase debt | (1,285) | (1,751)
Cash paid for preferred stock dividends | (69) | (160)
Other financing activities | (151) | (24)
Intercompany advances, net | 0 | 0
Net Cash Used In Financing Activities | (404) | (548)
Net decrease in cash and cash equivalents | (1) | (877)
Cash and cash equivalents, beginning of period | 5 | 882
Cash and cash equivalents, end of period | 4 | 5
Eliminations [Member] |  |
CASH FLOWS FROM OPERATING ACTIVITIES: |  |
Net Cash Provided By Operating Activities | (10) | (8)
CASH FLOWS FROM INVESTING ACTIVITIES: |  |
Drilling and completion costs | 0 | 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
Proceeds from issuance of senior notes, net | 0 | 0
Cash paid to purchase debt | 0 | 0
Cash paid for preferred stock dividends | 0 | 0
Other financing activities | (13) | 27
Intercompany advances, net | 22 | 0
Net Cash Used In Financing Activities | 9 | 27
Net decrease in cash and cash equivalents | (1) | 19
Cash and cash equivalents, beginning of period | (3) | (25)
Cash and cash equivalents, end of period | (4) | (6)
Parent Company [Member] | Reportable legal entities [Member] |  |
CASH FLOWS FROM OPERATING ACTIVITIES: |  |
Net Cash Provided By Operating Activities | 86 | 4
CASH FLOWS FROM INVESTING ACTIVITIES: |  |
Drilling and completion costs | 0 | 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 | 9,095 | 4,775
Payments on revolving credit facility borrowings | (9,231) | (4,130)
Proceeds from issuance of senior notes, net | 1,237 | 742
Cash paid to purchase debt | (1,285) | (1,751)
Cash paid for preferred stock dividends | (69) | (160)
Other financing activities | (2) | (36)
Intercompany advances, net | 170 | (339)
Net Cash Used In Financing Activities | (85) | (899)
Net decrease in cash and cash equivalents | 1 | (895)
Cash and cash equivalents, beginning of period | 5 | 904
Cash and cash equivalents, end of period | 6 | 9
Guarantor Subsidiaries [Member] | Reportable legal entities [Member] |  |
CASH FLOWS FROM OPERATING ACTIVITIES: |  |
Net Cash Provided By Operating Activities | 1,512 | 266
CASH FLOWS FROM INVESTING ACTIVITIES: |  |
Drilling and completion costs | (1,481) | (1,597)
Acquisitions of proved and unproved properties | (244) | (226)
Proceeds from divestitures of proved and unproved properties | 395 | 1,193
Additions to other property and equipment | (11) | (12)
Other investing activities | 149 | 40
Net Cash Used In Investing Activities | (1,192) | (602)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Proceeds from revolving credit facility borrowings | 0 | 0
Payments on revolving credit facility borrowings | 0 | 0
Proceeds from issuance of senior notes, net | 0 | 0
Cash paid to purchase debt | 0 | 0
Cash paid for preferred stock dividends | 0 | 0
Other financing activities | (127) | (4)
Intercompany advances, net | (193) | 339
Net Cash Used In Financing Activities | (320) | 335
Net decrease in cash and cash equivalents | 0 | (1)
Cash and cash equivalents, beginning of period | 1 | 2
Cash and cash equivalents, end of period | 1 | 1
Non-Guarantor Subsidiaries [Member] | Reportable legal entities [Member] |  |
CASH FLOWS FROM OPERATING ACTIVITIES: |  |
Net Cash Provided By Operating Activities | 7 | 11
CASH FLOWS FROM INVESTING ACTIVITIES: |  |
Drilling and completion costs | 0 | 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
Proceeds from issuance of senior notes, net | 0 | 0
Cash paid to purchase debt | 0 | 0
Cash paid for preferred stock dividends | 0 | 0
Other financing activities | (9) | (11)
Intercompany advances, net | 1 | 0
Net Cash Used In Financing Activities | (8) | (11)
Net decrease in cash and cash equivalents | (1) | 0
Cash and cash equivalents, beginning of period | 2 | 1
Cash and cash equivalents, end of period | $ 1 | $ 1

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