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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2018 | Sep. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES: |  |
NET INCOME (LOSS) | $ 363 | $ 619
ADJUSTMENTS TO RECONCILE NET INCOME TO CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES: |  |
Depreciation, depletion and amortization | 867 | 689
Derivative (gains) losses, net | 500 | (452)
Cash payments on derivative settlements, net | (162) | (46)
Stock-based compensation | 25 | 38
Net (gains) losses on sales of fixed assets | 7 | 0
Impairments | 51 | 3
Gains on investments | (139) | 0
(Gains) losses on purchases or exchanges of debt | 68 | (185)
Other | (101) | (27)
Changes in assets and liabilities | 116 | (366)
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)
Proceeds from sales of other property and equipment | 75 | 40
Proceeds from sales of investments | 74 | 0
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
Payment for Debt Extinguishment or Debt Prepayment Cost | (122) | 0
Cash paid to purchase debt | (1,285) | (1,751)
Cash paid for preferred stock dividends | (69) | (160)
Distributions to noncontrolling interest owners | (4) | (7)
Other | (25) | (17)
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
SUPPLEMENTAL CASH FLOW INFORMATION: |  |
Interest paid, net of capitalized interest | 412 | 342
Income taxes paid, net of refunds received | (3) | (15)
Change in accrued drilling and completion costs [Member] |  |
SUPPLEMENTAL DISCLOSURE OF SIGNIFICANT NON-CASH INVESTING AND FINANCING ACTIVITIES: |  |
Change in non-cash investing and financing activities | 165 | 134
Change in accrued acquisitions of proved and unproved properties [Member] |  |
SUPPLEMENTAL DISCLOSURE OF SIGNIFICANT NON-CASH INVESTING AND FINANCING ACTIVITIES: |  |
Change in non-cash investing and financing activities | 1 | (1)
Change in divested proved and unproved properties [Member] |  |
SUPPLEMENTAL DISCLOSURE OF SIGNIFICANT NON-CASH INVESTING AND FINANCING ACTIVITIES: |  |
Change in non-cash investing and financing activities | $ (5) | $ (23)

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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=98513485&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=109223946&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=109223946&loc=d3e3536-108585 + Details
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