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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Preferred stock, par value (usd per share) | $ 0.01 | $ 0.01
Preferred stock, shares authorized (shares) | 20,000,000 | 20,000,000
Preferred stock, shares outstanding (shares) | 5,603,468 | 5,603,458
Common stock, par value (usd per share) | $ 0.01 | $ 0.01
Common stock, shares authorized | 2,000,000,000 | 2,000,000,000
Common stock, shares issued | 913,691,662 | 908,732,809
Treasury stock, common shares | 3,307,953 | 2,240,394
VIE, cash and cash equivalents | $ 4 | $ 5
VIE, proved oil and natural gas properties | 70,620 | 68,858
VIE, accumulated depreciation, depletion and amortization | (64,500) | (63,664)
VIE, other current liabilities | 1,438 | 1,455
Variable Interest Entities, Primary Beneficiary [Member] |  |
VIE, cash and cash equivalents | 1 | 2
VIE, proved oil and natural gas properties | 488 | 488
VIE, accumulated depreciation, depletion and amortization | (463) | (461)
VIE, other current liabilities | $ 2 | $ 3

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- Definition Capitalized costs of proved properties incurred for any combination mineral interests acquisitions; wells and related equipment; support equipment and facilities; and uncompleted wells and equipment and other costs not previously disclosed within this table. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 360 -URI http://asc.fasb.org/subtopic&trid=2145654 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61901-109447 + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3044-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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