EOG Resources (EOG) 10-Q 2 May 19 2019 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	Apr. 26, 2019
Document and Entity Information [Abstract]
Entity Registrant Name	EOG RESOURCES INC
Entity Central Index Key	0000821189
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		580,324,615
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Current Reporting Status	Yes

Consolidated Statements of Inco

Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating Revenues and Other
Total	$ 4,058,642	$ 3,681,162
Operating Expenses
Lease and Well	336,291	300,064
Transportation Costs	176,522	176,957
Gathering and Processing Costs	111,295	101,345
Exploration Costs	36,324	34,836
Dry Hole Costs	94	0
Impairments	72,356	64,609
Marketing Costs	1,270,057	1,106,390
Depreciation, Depletion and Amortization	879,595	748,591
General and Administrative	106,672	94,698
Taxes Other Than Income	192,906	179,084
Total	3,182,112	2,806,574
Operating Income	876,530	874,588
Other Income, Net	5,612	727
Income Before Interest Expense and Income Taxes	882,142	875,315
Interest Expense
Interest Expense, Net	54,906	61,956
Income Before Income Taxes	827,236	813,359
Income Tax Provision	191,810	174,770
Net Income	$ 635,426	$ 638,589
Net Income Per Share
Basic	$ 1.10	$ 1.11
Diluted	$ 1.10	$ 1.10
Average Number of Common Shares
Basic	577,207	575,775
Diluted	580,222	579,726
Other Comprehensive Income (Loss)
Foreign Currency Translation Adjustments	$ (1,784)	$ 5,002
Other, Net of Tax	6	6
Other Comprehensive Income (Loss)	(1,778)	5,008
Comprehensive Income	633,648	643,597
Crude Oil and Condensate
Operating Revenues and Other
Revenues	2,200,403	2,101,308
Natural Gas Liquids
Operating Revenues and Other
Revenues	218,638	221,415
Natural Gas
Operating Revenues and Other
Revenues	334,972	299,766
Gains (Losses) on Mark-to-Market Commodity Derivative Contracts
Operating Revenues and Other
Revenues	(20,580)	(59,771)
Gathering, Processing and Marketing
Operating Revenues and Other
Revenues	1,285,654	1,101,822
Gains (Losses) on Asset Dispositions, Net
Operating Revenues and Other
Revenues	(3,836)	(14,969)
Other, Net
Operating Revenues and Other
Revenues	$ 43,391	$ 31,591

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current Assets
Cash and Cash Equivalents	$ 1,135,810	$ 1,555,634
Accounts Receivable, Net	2,203,438	1,915,215
Inventories	860,764	859,359
Assets from Price Risk Management Activities	3,909	23,806
Income Taxes Receivable	440,217	427,909
Other	263,747	275,467
Total	4,907,885	5,057,390
Property, Plant and Equipment
Oil and Gas Properties (Successful Efforts Method)	58,691,746	57,330,016
Other Property, Plant and Equipment	4,277,888	4,220,665
Total Property, Plant and Equipment	62,969,634	61,550,681
Less: Accumulated Depreciation, Depletion and Amortization	(33,840,631)	(33,475,162)
Total Property, Plant and Equipment, Net	29,129,003	28,075,519
Deferred Income Taxes	1,224	777
Other Assets	1,625,423	800,788
Total Assets	35,663,535	33,934,474
Current Liabilities
Accounts Payable	2,452,337	2,239,850
Accrued Taxes Payable	239,524	214,726
Dividends Payable	126,979	126,971
Liabilities from Price Risk Management Activities	746	0
Current Portion of Long-Term Debt	914,861	913,093
Current Portion of Operating Lease Liabilities	396,294	0
Other	170,527	233,724
Total	4,301,268	3,728,364
Long-Term Debt	5,166,050	5,170,169
Other Liabilities	1,772,248	1,258,355
Deferred Income Taxes	4,520,172	4,413,398
Commitments and Contingencies (Note 8)
Stockholders' Equity
Common Stock, $0.01 Par, 1,280,000,000 Shares Authorized and 580,740,395 Shares Issued at March 31, 2019 and 580,408,117 Shares Issued at December 31, 2018	205,807	205,804
Additional Paid in Capital	5,695,197	5,658,794
Accumulated Other Comprehensive Loss	(2,869)	(1,358)
Retained Earnings	14,050,676	13,543,130
Common Stock Held in Treasury, 425,637 Shares at March 31, 2019 and 385,042 Shares at December 31, 2018	(45,014)	(42,182)
Total Stockholders' Equity	19,903,797	19,364,188
Total Liabilities and Stockholders' Equity	$ 35,663,535	$ 33,934,474

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2019	Dec. 31, 2018
Common Stock
Common Stock, Par Value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares Authorized (in shares)	1,280,000,000	1,280,000,000
Common Stock, Shares Issued (in shares)	580,740,395	580,408,117
Treasury Stock (in shares)
Common Stock Held in Treasury, Shares	425,637	385,042

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash Flows from Operating Activities
Net Income	$ 635,426	$ 638,589
Items Not Requiring (Providing) Cash
Depreciation, Depletion and Amortization	879,595	748,591
Impairments	72,356	64,609
Stock-Based Compensation Expenses	39,087	35,486
Deferred Income Taxes	106,324	171,362
Gains (Losses) on Asset Dispositions, Net	(3,836)	(14,969)
Other, Net	2,952	2,013
Dry Hole Costs	94	0
Mark-to-Market Commodity Derivative Contracts
Total Losses	20,580	59,771
Net Cash Received from (Payments for) Settlements of Commodity Derivative Contracts	20,846	(21,965)
Other, Net	976	(478)
Changes in Components of Working Capital and Other Assets and Liabilities
Accounts Receivable	(308,996)	(109,654)
Inventories	(18,979)	(106,799)
Accounts Payable	194,082	53,652
Accrued Taxes Payable	114,998	21,950
Other Assets	(6,935)	(8,863)
Other Liabilities	(54,092)	(29,055)
Changes in Components of Working Capital Associated with Investing and Financing Activities	(94,381)	17,988
Net Cash Provided by Operating Activities	1,607,769	1,552,166
Investing Cash Flows
Additions to Oil and Gas Properties	(1,939,473)	(1,365,111)
Additions to Other Property, Plant and Equipment	(60,963)	(76,100)
Proceeds from Sales of Assets	15,049	2,829
Changes in Components of Working Capital Associated with Investing Activities	94,381	(18,045)
Net Cash Used in Investing Activities	(1,891,006)	(1,456,427)
Financing Cash Flows
Dividends Paid	(127,546)	(97,026)
Treasury Stock Purchased	(6,248)	(16,776)
Proceeds from Stock Options Exercised and Employee Stock Purchase Plan	403	1,453
Repayment of Finance Lease Liabilities	(3,190)	(1,671)
Changes in Components of Working Capital Associated with Financing Activities	0	57
Net Cash Used in Financing Activities	(136,581)	(113,963)
Effect of Exchange Rate Changes on Cash	(6)	90
Decrease in Cash and Cash Equivalents	(419,824)	(18,134)
Cash and Cash Equivalents at Beginning of Period	1,555,634	834,228
Cash and Cash Equivalents at End of Period	$ 1,135,810	$ 816,094

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity Statement - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Treasury Stock [Member]
Balance	$ 16,283,273	$ 205,788	$ 5,536,547	$ (19,297)	$ 10,593,533	$ (33,298)
Net Income	638,589	0	0	0	638,589	0
Common Stock Issued Under Stock Plans	1,454	2	1,452	0	0	0
Dividends, Common Stock	(107,071)	0	0	0	(107,071)	0
Other Comprehensive Loss	5,008	0	0	5,008	0	0
Change in Treasury Stock - Stock Compensation Plans, Net	(16,776)	0	(7,607)	0	0	(9,169)
Restricted Stock and Restricted Stock Units, Net	0	3	3,209	0	0	(3,212)
Stock-Based Compensation Expenses	35,486	0	35,486	0	0	0
Treasury Stock Issued as Compensation	676	0	107	0	0	569
Cumulative Effect of Adoption of ASU 2018-02, Income Statement - Reporting Income (Topic 220)	16,840,639	205,793	5,569,194	(14,289)	11,125,051	(45,110)
Balance	19,364,188	205,804	5,658,794	(1,358)	13,543,130	(42,182)
Net Income	635,426	0	0	0	635,426	0
Common Stock Issued Under Stock Plans	459	0	(1,235)	0	0	1,694
Dividends, Common Stock	(127,613)	0	0	0	(127,613)	0
Other Comprehensive Loss	(1,778)	0	0	(1,778)	0	0
Change in Treasury Stock - Stock Compensation Plans, Net	(6,248)	0	(5)	0	0	(6,243)
Restricted Stock and Restricted Stock Units, Net	0	3	(1,404)	0	0	1,401
Stock-Based Compensation Expenses	39,087	0	39,087	0	0	0
Treasury Stock Issued as Compensation	276	0	(40)	0	0	316
Balance	19,903,797	205,807	5,695,197	(2,869)	14,050,676	(45,014)
Cumulative Effect of Adoption of ASU 2018-02, Income Statement - Reporting Income (Topic 220)	$ 0	$ 0	$ 0	$ 267	$ (267)	$ 0

Consolidated Statements of St_2

Consolidated Statements of Stockholders' Equity Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Stockholders' Equity [Abstract]
Common Stock Dividends Declared (in dollars per share)	$ 0.22	$ 0.185

Summary of Significant Accounti

Summary of Significant Accounting Policies (Notes)	3 Months Ended
	Mar. 31, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies General. The condensed consolidated financial statements of EOG Resources, Inc., together with its subsidiaries (collectively, EOG), included herein have been prepared by management without audit pursuant to the rules and regulations of the United States Securities and Exchange Commission (SEC). Accordingly, they reflect all normal recurring adjustments which are, in the opinion of management, necessary for a fair presentation of the financial results for the interim periods presented. Certain information and notes normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) have been condensed or omitted pursuant to such rules and regulations. However, management believes that the disclosures included either on the face of the financial statements or in these notes are sufficient to make the interim information presented not misleading. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and the notes thereto included in EOG's Annual Report on Form 10-K for the year ended December 31, 2018 , filed on February 26, 2019 (EOG's 2018 Annual Report). The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The operating results for the three months ended March 31, 2019 , are not necessarily indicative of the results to be expected for the full year. Effective January 1, 2019, EOG adopted the provisions of Accounting Standards Update (ASU) 2016-02, "Leases (Topic 842)" (ASU 2016-02). ASU 2016-02 and other related ASUs require that lessees recognize a right-of-use (ROU) asset and related lease liability, representing the obligation to make lease payments for certain lease transactions, on the Condensed Consolidated Balance Sheets and disclose additional leasing information. EOG elected to adopt ASU 2016-02 and other related ASUs using the modified retrospective approach with a cumulative-effect adjustment to the opening balance of retained earnings as of the effective date. Financial results reported in periods prior to January 1, 2019, are unchanged. Additionally, EOG elected the package of practical expedients within ASU 2016-02 that allows an entity to not reassess prior to the effective date (i) whether any expired or existing contracts are or contain leases, (ii) the lease classification for any expired or existing leases, or (iii) initial direct costs for any existing leases, but did not elect the practical expedient of hindsight when determining the lease term of existing contracts at the effective date. EOG also elected the practical expedient under ASU 2018-01, "Leases (Topic 842) - Land Easement Practical Expedient for Transition to Topic 842," and did not evaluate existing or expired land easements not previously accounted for as leases prior to the January 1, 2019 effective date. There was no impact to retained earnings upon adoption of ASU 2016-02 and other related ASUs. See Note 14.

Stock-Based Compensation (Notes

Stock-Based Compensation (Notes)	3 Months Ended
	Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation As more fully discussed in Note 7 to the Consolidated Financial Statements included in EOG's 2018 Annual Report, EOG maintains various stock-based compensation plans. Stock-based compensation expense is included on the Condensed Consolidated Statements of Income and Comprehensive Income based upon the job function of the employees receiving the grants as follows (in millions): Three Months Ended 2019 2018 Lease and Well $ 13.7 $ 12.8 Gathering and Processing Costs 0.2 0.1 Exploration Costs 6.5 6.9 General and Administrative 18.7 15.7 Total $ 39.1 $ 35.5 The Amended and Restated EOG Resources, Inc. 2008 Omnibus Equity Compensation Plan (2008 Plan) provides for grants of stock options, stock-settled stock appreciation rights (SARs), restricted stock and restricted stock units, performance units and other stock-based awards. At March 31, 2019 , approximately 12.9 million common shares remained available for grant under the 2008 Plan. EOG's policy is to issue shares related to 2008 Plan grants from previously authorized unissued shares or treasury shares to the extent treasury shares are available. Stock Options and Stock-Settled Stock Appreciation Rights and Employee Stock Purchase Plan . The fair value of stock option grants and SAR grants is estimated using the Hull-White II binomial option pricing model. The fair value of Employee Stock Purchase Plan (ESPP) grants is estimated using the Black-Scholes-Merton model. Stock-based compensation expense related to stock option, SAR and ESPP grants totaled $13.9 million and $12.0 million during the three months ended March 31, 2019 and 2018 , respectively. Weighted average fair values and valuation assumptions used to value stock option, SAR and ESPP grants during the three -month periods ended March 31, 2019 and 2018 are as follows: Stock Options/SARs ESPP Three Months Ended Three Months Ended 2019 2018 2019 2018 Weighted Average Fair Value of Grants $ 27.19 $ 28.19 $ 22.98 $ 23.27 Expected Volatility 31.81 % 29.01 % 36.31 % 22.04 % Risk-Free Interest Rate 2.51 % 2.09 % 2.48 % 1.60 % Dividend Yield 0.88 % 0.66 % 0.83 % 0.66 % Expected Life 5.0 years 5.0 years 0.5 years 0.5 years Expected volatility is based on an equal weighting of historical volatility and implied volatility from traded options in EOG's common stock. The risk-free interest rate is based upon United States Treasury yields in effect at the time of grant. The expected life is based upon historical experience and contractual terms of stock option, SAR and ESPP grants. The following table sets forth stock option and SAR transactions for the three -month periods ended March 31, 2019 and 2018 (stock options and SARs in thousands): Three Months Ended Three Months Ended Number of Stock Options/SARs Weighted Average Grant Price Number of Stock Options/SARs Weighted Average Grant Price Outstanding at January 1 8,310 $ 96.90 9,103 $ 83.89 Granted 17 96.67 16 106.76 Exercised (1) (43 ) 69.94 (752 ) 74.65 Forfeited (48 ) 105.43 (77 ) 91.94 Outstanding at March 31 (2) 8,236 $ 96.99 8,290 $ 84.70 Vested or Expected to Vest (3) 7,892 $ 96.53 7,940 $ 84.38 Exercisable at March 31 (4) 3,997 $ 86.25 3,803 $ 76.16 (1) The total intrinsic value of stock options/SARs exercised for the three months ended March 31, 2019 and 2018 was $1.1 million and $28.4 million , respectively. The intrinsic value is based upon the difference between the market price of EOG's common stock on the date of exercise and the grant price of the stock options/SARs. (2) The total intrinsic value of stock options/SARs outstanding at March 31, 2019 and 2018 was $51.8 million and $170.7 million , respectively. At March 31, 2019 and 2018 , the weighted average remaining contractual life was 4.2 years and 4.3 years , respectively. (3) The total intrinsic value of stock options/SARs vested or expected to vest at March 31, 2019 and 2018 was $51.1 million and $166.1 million , respectively. At March 31, 2019 and 2018 , the weighted average remaining contractual life was 4.1 years and 4.2 years , respectively. (4) The total intrinsic value of stock options/SARs exercisable at March 31, 2019 and 2018 was $43.1 million and $110.8 million , respectively. At March 31, 2019 and 2018 , the weighted average remaining contractual life was 2.7 years and 2.6 years , respectively. At March 31, 2019 , unrecognized compensation expense related to non-vested stock option, SAR and ESPP grants totaled $94.6 million . Such unrecognized expense will be amortized on a straight-line basis over a weighted average period of 1.9 years . Restricted Stock and Restricted Stock Units. Employees may be granted restricted (non-vested) stock and/or restricted stock units without cost to them. Stock-based compensation expense related to restricted stock and restricted stock units totaled $23.3 million and $22.4 million for the three months ended March 31, 2019 and 2018 , respectively. The following table sets forth restricted stock and restricted stock unit transactions for the three -month periods ended March 31, 2019 and 2018 (shares and units in thousands): Three Months Ended Three Months Ended Number of Shares and Units Weighted Average Grant Date Fair Value Number of Shares and Units Weighted Average Grant Date Fair Value Outstanding at January 1 3,792 $ 96.64 3,905 $ 88.57 Granted 371 96.72 279 102.27 Released (1) (247 ) 93.37 (276 ) 66.46 Forfeited (26 ) 98.11 (75 ) 90.65 Outstanding at March 31 (2) 3,890 $ 96.85 3,833 $ 91.12 (1) The total intrinsic value of restricted stock and restricted stock units released for the three months ended March 31, 2019 and 2018 was $22.0 million and $28.4 million , respectively. The intrinsic value is based upon the closing price of EOG's common stock on the date the restricted stock and restricted stock units are released. (2) The total intrinsic value of restricted stock and restricted stock units outstanding at March 31, 2019 and 2018 was $370.2 million and $403.5 million , respectively. At March 31, 2019 , unrecognized compensation expense related to restricted stock and restricted stock units totaled $182.8 million . Such unrecognized expense will be amortized on a straight-line basis over a weighted average period of 1.9 years . Performance Units. EOG grants performance units annually to its executive officers without cost to them. As more fully discussed in the grant agreements, the performance metric applicable to the performance units is EOG's total shareholder return over a three -year performance period relative to the total shareholder return of a designated group of peer companies (Performance Period). Upon the application of the performance multiple at the completion of the Performance Period, a minimum of 0% and a maximum of 200% of the performance units granted could be outstanding. The fair value of the performance units is estimated using a Monte Carlo simulation. Stock-based compensation expense related to the performance unit grants totaled $1.9 million and $1.1 million for the three -month periods ended March 31, 2019 and 2018 , respectively. The following table sets forth the performance unit transactions for the three -month periods ended March 31, 2019 and 2018 (units in thousands): Three Months Ended Three Months Ended Number of Units Weighted Average Price per Grant Date Number of Units Weighted Average Price per Grant Date Outstanding at January 1 539 $ 101.53 502 $ 90.96 Granted — — — — Granted for Performance Multiple (1) 72 69.43 72 101.87 Released — — — — Forfeited — — — — Outstanding at March 31 (2) 611 (3) $ 97.75 574 $ 92.33 (1) Upon completion of the Performance Period for the performance units granted in 2015 and 2014, a performance multiple of 200% was applied to each of the grants resulting in additional grants of performance units in February 2019 and February 2018, respectively. (2) The total intrinsic value of performance units outstanding at March 31, 2019 and 2018 was approximately $58.1 million and $60.4 million , respectively. (3) Upon the application of the relevant performance multiple at the completion of each of the remaining Performance Periods, a minimum of 287 and a maximum of 934 performance units could be outstanding. At March 31, 2019 , unrecognized compensation expense related to performance units totaled $7.9 million . Such unrecognized expense will be amortized on a straight-line basis over a weighted average period of 1.6 years .

Net Income Per Share (Notes)

Net Income Per Share (Notes)	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Net Income Per Share	Net Income Per Share The following table sets forth the computation of Net Income Per Share for the three -month periods ended March 31, 2019 and 2018 (in thousands, except per share data): Three Months Ended 2019 2018 Numerator for Basic and Diluted Earnings Per Share - Net Income $ 635,426 $ 638,589 Denominator for Basic Earnings Per Share - Weighted Average Shares 577,207 575,775 Potential Dilutive Common Shares - Stock Options/SARs 472 1,217 Restricted Stock/Units and Performance Units 2,543 2,734 Denominator for Diluted Earnings Per Share - Adjusted Diluted Weighted Average Shares 580,222 579,726 Net Income Per Share Basic $ 1.10 $ 1.11 Diluted $ 1.10 $ 1.10 The diluted earnings per share calculation excludes stock options and SARs that were anti-dilutive. Shares underlying the excluded stock options and SARs were 4.9 million and 0.2 million shares for the three months ended March 31, 2019 and 2018 , respectively.

Supplemental Cash Flow Informat

Supplemental Cash Flow Information (Notes)	3 Months Ended
	Mar. 31, 2019
Supplemental Cash Flow Information [Abstract]
Supplemental Cash Flow Information	Supplemental Cash Flow Information Net cash paid (received) for interest and income taxes was as follows for the three -month periods ended March 31, 2019 and 2018 (in thousands): Three Months Ended 2019 2018 Interest (1) $ 47,771 $ 50,103 Income Taxes, Net of Refunds Received $ (9,307 ) $ 3,554 (1) Net of capitalized interest of $7 million and $5 million for the three months ended March 31, 2019 and 2018 , respectively. EOG's accrued capital expenditures at March 31, 2019 and 2018 were $706 million and $593 million , respectively. Non-cash investing activities for the three months ended March 31, 2019 and 2018 , included additions of $62 million and $9 million , respectively, to EOG's oil and gas properties as a result of property exchanges. Non-cash investing activities for the three months ended March 31, 2018 included additions of $48 million to EOG's other property, plant and equipment primarily in connection with a capital lease transaction in the Permian Basin. Cash paid for leases for the three months ended March 31, 2019, are disclosed in Note 14.

Segment Information (Notes)

Segment Information (Notes)	3 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Segment Information	Segment Information Selected financial information by reportable segment is presented below for the three -month periods ended March 31, 2019 and 2018 (in thousands): Three Months Ended 2019 2018 Operating Revenues and Other United States $ 3,977,019 $ 3,571,134 Trinidad 69,868 81,013 Other International (1) 11,755 29,015 Total $ 4,058,642 $ 3,681,162 Operating Income (Loss) United States $ 850,900 $ 845,853 Trinidad 38,832 40,297 Other International (1) (13,202 ) (11,562 ) Total 876,530 874,588 Reconciling Items Other Income, Net 5,612 727 Interest Expense, Net (54,906 ) (61,956 ) Income Before Income Taxes $ 827,236 $ 813,359 (1) Other International primarily consists of EOG's United Kingdom, China and Canada operations. The United Kingdom operations were sold in the fourth quarter of 2018. Total assets by reportable segment are presented below at March 31, 2019 and December 31, 2018 (in thousands): At March 31, 2019 At December 31, 2018 Total Assets United States $ 34,860,142 $ 33,178,733 Trinidad 670,563 629,633 Other International (1) 132,830 126,108 Total $ 35,663,535 $ 33,934,474 (1) Other International primarily consists of EOG's China and Canada operations.

Asset Retirement Obligations (N

Asset Retirement Obligations (Notes)	3 Months Ended
	Mar. 31, 2019
Asset Retirement Obligation [Abstract]
Asset Retirement Obligations	Asset Retirement Obligations The following table presents the reconciliation of the beginning and ending aggregate carrying amounts of short-term and long-term legal obligations associated with the retirement of property, plant and equipment for the three -month periods ended March 31, 2019 and 2018 (in thousands): Three Months Ended 2019 2018 Carrying Amount at January 1 $ 954,377 $ 946,848 Liabilities Incurred 15,360 10,279 Liabilities Settled (1) (24,709 ) 50 Accretion 10,193 8,868 Revisions (9,704 ) (291 ) Foreign Currency Translations 112 245 Carrying Amount at March 31 $ 945,629 $ 965,999 Current Portion $ 26,182 $ 19,177 Noncurrent Portion $ 919,447 $ 946,822 (1) Includes settlements related to asset sales. The current and noncurrent portions of EOG's asset retirement obligations are included in Current Liabilities - Other and Other Liabilities, respectively, on the Condensed Consolidated Balance Sheets.

Exploratory Well Costs (Notes)

Exploratory Well Costs (Notes)	3 Months Ended
	Mar. 31, 2019
Capitalized Exploratory Well Costs [Abstract]
Exploratory Well Costs	Exploratory Well Costs EOG's net changes in capitalized exploratory well costs for the three -month period ended March 31, 2019 , are presented below (in thousands): Three Months Ended Balance at January 1 $ 4,121 Additions Pending the Determination of Proved Reserves 9,444 Reclassifications to Proved Properties — Costs Charged to Expense — Balance at March 31 $ 13,565 At March 31, 2019 , all capitalized exploratory well costs had been capitalized for periods of less than one year.

Commitments and Contingencies (

Commitments and Contingencies (Notes)	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies There are currently various suits and claims pending against EOG that have arisen in the ordinary course of EOG's business, including contract disputes, personal injury and property damage claims and title disputes. While the ultimate outcome and impact on EOG cannot be predicted, management believes that the resolution of these suits and claims will not, individually or in the aggregate, have a material adverse effect on EOG's consolidated financial position, results of operations or cash flow. EOG records reserves for contingencies when information available indicates that a loss is probable and the amount of the loss can be reasonably estimated.

Pension and Postretirement Bene

Pension and Postretirement Benefits (Notes)	3 Months Ended
	Mar. 31, 2019
Retirement Benefits [Abstract]
Pension and Postretirement Benefits	Pension and Postretirement Benefits EOG has defined contribution pension plans in place for most of its employees in the United States, and a defined benefit pension plan covering certain of its employees in Trinidad. For the three months ended March 31, 2019 and 2018 , EOG's total costs recognized for these pension plans were $12.0 million and $9.9 million , respectively. EOG also has postretirement medical and dental plans in place for eligible employees and their dependents in the United States and Trinidad, the costs of which are not material.

Long-Term Debt and Common Stock

Long-Term Debt and Common Stock (Notes)	3 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
Long-Term Debt and Common Stock	Long-Term Debt and Common Stock Long-Term Debt. EOG had no outstanding commercial paper borrowings or uncommitted credit facility borrowings at March 31, 2019 and December 31, 2018, and did not utilize any such borrowings during the three months ended March 31, 2019. During the three months ended March 31, 2018, EOG utilized commercial paper, bearing market interest rates, for various corporate financing purposes. The average borrowings outstanding under the commercial paper program were $18 million during the three months ended March 31, 2018. The weighted average interest rate for commercial paper borrowings was 1.76% during the three months ended March 31, 2018. EOG currently has a $2.0 billion senior unsecured Revolving Credit Agreement (Agreement) with domestic and foreign lenders. The Agreement has a scheduled maturity date of July 21, 2020 , and includes an option for EOG to extend, on up to two occasions, the term for successive one-year periods subject to certain terms and conditions. Advances under the Agreement will accrue interest based, at EOG's option, on either the London InterBank Offered Rate plus an applicable margin (Eurodollar rate) or the base rate (as defined in the Agreement) plus an applicable margin. The Agreement contains representations, warranties, covenants and events of default that are customary for investment-grade, senior unsecured commercial bank credit agreements, including a financial covenant for the maintenance of a debt-to-capitalization ratio of no greater than 65% . At March 31, 2019 , EOG was in compliance with this financial covenant. At March 31, 2019 and December 31, 2018 , there were no borrowings or letters of credit outstanding under the Agreement. The Eurodollar rate and applicable base rate, had there been any amounts borrowed under the Agreement at March 31, 2019 , would have been 3.50% and 5.50% , respectively. Common Stock. On May 2, 2019, EOG's Board of Directors increased the quarterly cash dividend on the common stock from the previous $0.22 per share to $0.2875 per share, effective beginning with the dividend to be paid on July 31, 2019, to stockholders of record as of July 17, 2019.

Fair Value Measurements (Notes)

Fair Value Measurements (Notes)	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements As more fully discussed in Note 13 to the Consolidated Financial Statements included in EOG's 2018 Annual Report, certain of EOG's financial and nonfinancial assets and liabilities are reported at fair value on the Condensed Consolidated Balance Sheets. The following table provides fair value measurement information within the fair value hierarchy for certain of EOG's financial assets and liabilities carried at fair value on a recurring basis at March 31, 2019 and December 31, 2018 (in thousands): Fair Value Measurements Using: Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total At March 31, 2019 Financial Assets: Natural Gas Swaps $ — $ 7,974 $ — $ 7,974 Financial Liabilities: Crude Oil Swaps $ — $ 2,124 $ — $ 2,124 Crude Oil Basis Swaps — 2,687 — 2,687 At December 31, 2018 Financial Assets: Crude Oil Basis Swaps $ — $ 23,806 $ — $ 23,806 The estimated fair value of commodity derivative contracts was based upon forward commodity price curves based on quoted market prices. Commodity derivative contracts were valued by utilizing an independent third-party derivative valuation provider who uses various types of valuation models, as applicable. The initial measurement of asset retirement obligations at fair value is calculated using discounted cash flow techniques and based on internal estimates of future retirement costs associated with property, plant and equipment. Significant Level 3 inputs used in the calculation of asset retirement obligations include plugging costs and reserve lives. A reconciliation of EOG's asset retirement obligations is presented in Note 6. Proved oil and gas properties and other assets with a carrying amount of $208 million were written down to their fair value of $183 million , resulting in pretax impairment charges of $25 million for the three months ended March 31, 2019 . Included in the $25 million pretax impairment charges are $24 million for a commodity price-related write-down of other assets. EOG utilized average prices per acre from comparable market transactions and estimated discounted cash flows as the basis for determining the fair value of unproved and proved properties, respectively, received in non-cash property exchanges. See Note 4. Fair Value of Debt. At March 31, 2019 and December 31, 2018 , EOG had outstanding $6,040 million aggregate principal amount of senior notes, which had estimated fair values at such dates of approximately $6,168 million and $6,027 million , respectively. The estimated fair value of debt was based upon quoted market prices and, where such prices were not available, other observable (Level 2) inputs regarding interest rates available to EOG at the end of each respective period.

Risk Management Activities (Not

Risk Management Activities (Notes)	3 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Risk Management Activities	Risk Management Activities Commodity Price Risk . As more fully discussed in Note 12 to the Consolidated Financial Statements included in EOG's 2018 Annual Report, EOG engages in price risk management activities from time to time. These activities are intended to manage EOG's exposure to fluctuations in commodity prices for crude oil and natural gas. EOG utilizes financial commodity derivative instruments, primarily price swap, option, swaption, collar and basis swap contracts, as a means to manage this price risk. EOG has not designated any of its financial commodity derivative contracts as accounting hedges and, accordingly, accounts for financial commodity derivative contracts using the mark-to-market accounting method. Commodity Derivative Contracts. Prices received by EOG for its crude oil production generally vary from U.S. New York Mercantile Exchange (NYMEX) West Texas Intermediate prices due to adjustments for delivery location (basis) and other factors. EOG has entered into crude oil basis swap contracts in order to fix the differential between pricing in Midland, Texas, and Cushing, Oklahoma (Midland Differential). Presented below is a comprehensive summary of EOG's Midland Differential basis swap contracts for the three months ended March 31, 2019 . The weighted average price differential expressed in dollars per barrel ($/Bbl) represents the amount of reduction to Cushing, Oklahoma, prices for the notional volumes expressed in barrels per day (Bbld) covered by the basis swap contracts. Midland Differential Basis Swap Contracts Volume (Bbld) Weighted Average Price Differential ($/Bbl) 2019 January 1, 2019 through April 30, 2019 (closed) 20,000 $ 1.075 May 1, 2019 through December 31, 2019 20,000 1.075 EOG has also entered into crude oil basis swap contracts in order to fix the differential between pricing in the U.S. Gulf Coast and Cushing, Oklahoma (Gulf Coast Differential). Presented below is a comprehensive summary of EOG's Gulf Coast Differential basis swap contracts for the three months ended March 31, 2019 . The weighted average price differential expressed in $/Bbl represents the amount of addition to Cushing, Oklahoma, prices for the notional volumes expressed in Bbld covered by the basis swap contracts. Gulf Coast Differential Basis Swap Contracts Volume (Bbld) Weighted Average Price Differential ($/Bbl) 2019 January 1, 2019 through April 30, 2019 (closed) 13,000 $ 5.572 May 1, 2019 through December 31, 2019 13,000 5.572 Presented below is a comprehensive summary of EOG's crude oil price swap contracts for the three months ended March 31, 2019 , with notional volumes expressed in Bbld and prices expressed in $/Bbl. Crude Oil Price Swap Contracts Volume (Bbld) Weighted Average Price ($/Bbl) 2019 April 1, 2019 through December 31, 2019 25,000 $ 60.00 Presented below is a comprehensive summary of EOG's natural gas price swap contracts for the three months ended March 31, 2019 , with notional volumes expressed in million British thermal units (MMBtu) per day (MMBtud) and prices expressed in dollars per MMBtu ($/MMBtu). Natural Gas Price Swap Contracts Volume (MMBtud) Weighted Average Price ($/MMBtu) 2019 April 2019 (closed) 250,000 $ 2.90 May 1, 2019 through October 31, 2019 250,000 2.90 The following table sets forth the amounts and classification of EOG's outstanding financial derivative instruments at March 31, 2019 and December 31, 2018 . Certain amounts may be presented on a net basis on the Condensed Consolidated Financial Statements when such amounts are with the same counterparty and subject to a master netting arrangement (in thousands): Fair Value at Description Location on Balance Sheet March 31, 2019 December 31, 2018 Asset Derivatives Crude oil and natural gas derivative contracts - Current portion Assets from Price Risk Management Activities (1) $ 3,909 $ 23,806 Liability Derivatives Crude oil and natural gas derivative contracts - Current portion Liabilities from Price Risk Management Activities (2) $ 746 $ — (1) The current portion of Assets from Price Risk Management Activities consists of gross assets of $7 million , partially offset by gross liabilities of $3 million at March 31, 2019. (2) The current portion of Liabilities from Price Risk Management Activities consists of gross liabilities of $2 million , partially offset by gross assets of $1 million at March 31, 2019 . Credit Risk. Notional contract amounts are used to express the magnitude of a financial derivative. The amounts potentially subject to credit risk, in the event of nonperformance by the counterparties, are equal to the fair value of such contracts (see Note 11). EOG evaluates its exposure to significant counterparties on an ongoing basis, including those arising from physical and financial transactions. In some instances, EOG renegotiates payment terms and/or requires collateral, parent guarantees or letters of credit to minimize credit risk. All of EOG's derivative instruments are covered by International Swap Dealers Association Master Agreements (ISDAs) with counterparties. The ISDAs may contain provisions that require EOG, if it is the party in a net liability position, to post collateral when the amount of the net liability exceeds the threshold level specified for EOG's then-current credit ratings. In addition, the ISDAs may also provide that as a result of certain circumstances, including certain events that cause EOG's credit ratings to become materially weaker than its then-current ratings, the counterparty may require all outstanding derivatives under the ISDAs to be settled immediately. See Note 11 for the aggregate fair value of all derivative instruments that were in a net asset position at March 31, 2019 and December 31, 2018 . EOG had no collateral posted and held no collateral at March 31, 2019 and December 31, 2018 .

Acquisitions and Divestitures (

Acquisitions and Divestitures (Notes)	3 Months Ended
	Mar. 31, 2019
Discontinued Operations and Disposal Groups [Abstract]
Acquisitions and Divestitures	Acquisitions and Divestitures During the three months ended March 31, 2019 , EOG paid cash for property acquisitions of $303 million in the United States. Additionally, during the three months ended March 31, 2019 , EOG recognized a net loss on asset dispositions of $(4) million , primarily due to the sale of proved property in Texas, and received proceeds of approximately $15 million . During the three months ended March 31, 2018 , EOG recognized a net loss on asset dispositions of $(15) million , primarily due to the disposition of inventory and other assets, and received proceeds of approximately $3 million .

Leases (Notes)

Leases (Notes)	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Lessee Operating and Finance Leases	Leases In the ordinary course of business, EOG enters into contracts for drilling, fracturing, compression, real estate and other services which contain equipment and other assets that meet the definition of a lease under ASU 2016-02. The lease term for these contracts, which includes any renewals at EOG's option that are reasonably certain to be exercised, range from one month to 30 years. ROU assets and related liabilities are recognized on commencement date on the Condensed Consolidated Balance Sheets based on future lease payments, discounted based on the rate implicit in the contract, if readily determinable, or EOG's incremental borrowing rate commensurate with the lease term of the contract. Contracts with lease terms less than 12 months are not recorded on the Condensed Consolidated Balance Sheets, but instead are disclosed as short-term lease cost. EOG has elected not to separate non-lease components from all leases, excluding those for fracturing services, real estate and salt water disposal, as lease payments for these contracts contain significant non-lease components, such as labor and operating costs. Lease costs are classified by the function of the ROU asset. The lease costs related to exploration and development activities are initially included in the Oil and Gas Properties line on the Condensed Consolidated Balance Sheets and subsequently accounted for in accordance with the Extractive Industries - Oil and Gas Topic of the Accounting Standards Codification. Variable lease cost represents costs incurred above the contractual minimum payments for operating and finance leases. The components of lease cost were as follows (in millions): Three Months Ended Operating Lease Cost $ 119 Finance Lease Cost: Amortization of Lease Assets 3 Interest on Lease Liabilities 1 Variable Lease Cost 31 Short-Term Lease Cost 71 Total Lease Cost $ 225 The following table sets forth the amounts and classification of EOG's outstanding ROU assets and lease liabilities and supplemental information at March 31, 2019 (in millions, except lease terms and discount rates): Description Location on Balance Sheet Amount Assets Operating Leases Other Assets $ 900 Finance Leases Property, Plant and Equipment, Net (1) 63 Total $ 963 Liabilities Current Operating Leases Current Portion of Operating Lease Liabilities $ 396 Finance Leases Current Portion of Long-Term Debt 15 Long-Term Operating Leases Other Liabilities 529 Finance Leases Long-Term Debt 53 Total $ 993 (1) Finance lease assets are recorded net of accumulated amortization of $50 million at March 31, 2019 . Three Months Ended Weighted Average Remaining Lease Term (in years): Operating Leases 3.3 Finance Leases 5.5 Weighted Average Discount Rate: Operating Leases 3.5 % Finance Leases 3.0 % Cash paid for leases was as follows for the three months ended March 31, 2019 (in millions): Three Months Ended Repayment of Operating Lease Liabilities Associated with Operating Activities $ 52 Repayment of Operating Lease Liabilities Associated with Investing Activities 66 Repayment of Finance Lease Liabilities 3 Upon adoption of ASU 2016-02 on January 1, 2019, EOG recognized operating lease ROU assets of $566 million . Non-cash leasing activities for the three months ended March 31, 2019 , included the addition of $450 million of operating leases. At March 31, 2019 , the future minimum lease payments under non-cancellable leases are as follows (in millions): Operating Leases Finance Leases April 1, 2019 to December 31, 2019 $ 328 $ 11 2020 326 15 2021 145 15 2022 87 12 2023 37 8 2024 and Beyond 62 14 Total Lease Payments 985 75 Less: Discount to Present Value 60 7 Total Lease Liabilities 925 68 Less: Current Portion of Lease Liabilities 396 15 Long-Term Lease Liabilities $ 529 $ 53 At March 31, 2019 , EOG has additional leases of $752 million , of which $118 million , $429 million and $205 million are expected to commence in the remainder of 2019, 2020 and 2021, respectively, with lease terms of 1 month to 10 years . At December 31, 2018 and prior to the adoption of ASU 2016-02 and other related ASUs, the future minimum commitments under non-cancellable leases including non-lease components and excluding contracts with lease terms less than 12 months were as follows (in millions): Operating Leases Finance Leases 2019 $ 380 $ 15 2020 213 15 2021 86 15 2022 39 12 2023 30 8 2024 and Beyond 62 14 Total Lease Payments $ 810 $ 79

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs	Stock-based compensation expense is included on the Condensed Consolidated Statements of Income and Comprehensive Income based upon the job function of the employees receiving the grants as follows (in millions): Three Months Ended 2019 2018 Lease and Well $ 13.7 $ 12.8 Gathering and Processing Costs 0.2 0.1 Exploration Costs 6.5 6.9 General and Administrative 18.7 15.7 Total $ 39.1 $ 35.5
Weighted Average Fair Values and Valuation Assumptions	Weighted average fair values and valuation assumptions used to value stock option, SAR and ESPP grants during the three -month periods ended March 31, 2019 and 2018 are as follows: Stock Options/SARs ESPP Three Months Ended Three Months Ended 2019 2018 2019 2018 Weighted Average Fair Value of Grants $ 27.19 $ 28.19 $ 22.98 $ 23.27 Expected Volatility 31.81 % 29.01 % 36.31 % 22.04 % Risk-Free Interest Rate 2.51 % 2.09 % 2.48 % 1.60 % Dividend Yield 0.88 % 0.66 % 0.83 % 0.66 % Expected Life 5.0 years 5.0 years 0.5 years 0.5 years
Stock Options and SARs Transactions	The following table sets forth stock option and SAR transactions for the three -month periods ended March 31, 2019 and 2018 (stock options and SARs in thousands): Three Months Ended Three Months Ended Number of Stock Options/SARs Weighted Average Grant Price Number of Stock Options/SARs Weighted Average Grant Price Outstanding at January 1 8,310 $ 96.90 9,103 $ 83.89 Granted 17 96.67 16 106.76 Exercised (1) (43 ) 69.94 (752 ) 74.65 Forfeited (48 ) 105.43 (77 ) 91.94 Outstanding at March 31 (2) 8,236 $ 96.99 8,290 $ 84.70 Vested or Expected to Vest (3) 7,892 $ 96.53 7,940 $ 84.38 Exercisable at March 31 (4) 3,997 $ 86.25 3,803 $ 76.16 (1) The total intrinsic value of stock options/SARs exercised for the three months ended March 31, 2019 and 2018 was $1.1 million and $28.4 million , respectively. The intrinsic value is based upon the difference between the market price of EOG's common stock on the date of exercise and the grant price of the stock options/SARs. (2) The total intrinsic value of stock options/SARs outstanding at March 31, 2019 and 2018 was $51.8 million and $170.7 million , respectively. At March 31, 2019 and 2018 , the weighted average remaining contractual life was 4.2 years and 4.3 years , respectively. (3) The total intrinsic value of stock options/SARs vested or expected to vest at March 31, 2019 and 2018 was $51.1 million and $166.1 million , respectively. At March 31, 2019 and 2018 , the weighted average remaining contractual life was 4.1 years and 4.2 years , respectively. (4) The total intrinsic value of stock options/SARs exercisable at March 31, 2019 and 2018 was $43.1 million and $110.8 million , respectively. At March 31, 2019 and 2018 , the weighted average remaining contractual life was 2.7 years and 2.6 years , respectively.
Restricted Stock and Restricted Stock Unit Transactions	The following table sets forth restricted stock and restricted stock unit transactions for the three -month periods ended March 31, 2019 and 2018 (shares and units in thousands): Three Months Ended Three Months Ended Number of Shares and Units Weighted Average Grant Date Fair Value Number of Shares and Units Weighted Average Grant Date Fair Value Outstanding at January 1 3,792 $ 96.64 3,905 $ 88.57 Granted 371 96.72 279 102.27 Released (1) (247 ) 93.37 (276 ) 66.46 Forfeited (26 ) 98.11 (75 ) 90.65 Outstanding at March 31 (2) 3,890 $ 96.85 3,833 $ 91.12 (1) The total intrinsic value of restricted stock and restricted stock units released for the three months ended March 31, 2019 and 2018 was $22.0 million and $28.4 million , respectively. The intrinsic value is based upon the closing price of EOG's common stock on the date the restricted stock and restricted stock units are released. (2) The total intrinsic value of restricted stock and restricted stock units outstanding at March 31, 2019 and 2018 was $370.2 million and $403.5 million , respectively.
Weighted Average Fair Values and Valuation Assumptions for Performance Award Grants	The following table sets forth the performance unit transactions for the three -month periods ended March 31, 2019 and 2018 (units in thousands): Three Months Ended Three Months Ended Number of Units Weighted Average Price per Grant Date Number of Units Weighted Average Price per Grant Date Outstanding at January 1 539 $ 101.53 502 $ 90.96 Granted — — — — Granted for Performance Multiple (1) 72 69.43 72 101.87 Released — — — — Forfeited — — — — Outstanding at March 31 (2) 611 (3) $ 97.75 574 $ 92.33 (1) Upon completion of the Performance Period for the performance units granted in 2015 and 2014, a performance multiple of 200% was applied to each of the grants resulting in additional grants of performance units in February 2019 and February 2018, respectively. (2) The total intrinsic value of performance units outstanding at March 31, 2019 and 2018 was approximately $58.1 million and $60.4 million , respectively. (3) Upon the application of the relevant performance multiple at the completion of each of the remaining Performance Periods, a minimum of 287 and a maximum of 934 performance units could be outstanding.

Net Income Per Share (Tables)

Net Income Per Share (Tables)	3 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Computation of Net Income Per Share	The following table sets forth the computation of Net Income Per Share for the three -month periods ended March 31, 2019 and 2018 (in thousands, except per share data): Three Months Ended 2019 2018 Numerator for Basic and Diluted Earnings Per Share - Net Income $ 635,426 $ 638,589 Denominator for Basic Earnings Per Share - Weighted Average Shares 577,207 575,775 Potential Dilutive Common Shares - Stock Options/SARs 472 1,217 Restricted Stock/Units and Performance Units 2,543 2,734 Denominator for Diluted Earnings Per Share - Adjusted Diluted Weighted Average Shares 580,222 579,726 Net Income Per Share Basic $ 1.10 $ 1.11 Diluted $ 1.10 $ 1.10

Supplemental Cash Flow Inform_2

Supplemental Cash Flow Information (Tables)	3 Months Ended
	Mar. 31, 2019
Supplemental Cash Flow Information [Abstract]
Net Cash Paid For Interest and Income Taxes	Net cash paid (received) for interest and income taxes was as follows for the three -month periods ended March 31, 2019 and 2018 (in thousands): Three Months Ended 2019 2018 Interest (1) $ 47,771 $ 50,103 Income Taxes, Net of Refunds Received $ (9,307 ) $ 3,554 (1) Net of capitalized interest of $7 million and $5 million for the three months ended March 31, 2019 and 2018 , respectively.

Segment Information (Tables)

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Selected Financial Information by Reportable Segment	Selected financial information by reportable segment is presented below for the three -month periods ended March 31, 2019 and 2018 (in thousands): Three Months Ended 2019 2018 Operating Revenues and Other United States $ 3,977,019 $ 3,571,134 Trinidad 69,868 81,013 Other International (1) 11,755 29,015 Total $ 4,058,642 $ 3,681,162 Operating Income (Loss) United States $ 850,900 $ 845,853 Trinidad 38,832 40,297 Other International (1) (13,202 ) (11,562 ) Total 876,530 874,588 Reconciling Items Other Income, Net 5,612 727 Interest Expense, Net (54,906 ) (61,956 ) Income Before Income Taxes $ 827,236 $ 813,359 (1) Other International primarily consists of EOG's United Kingdom, China and Canada operations. The United Kingdom operations were sold in the fourth quarter of 2018.
Assets by Reportable Segment	Total assets by reportable segment are presented below at March 31, 2019 and December 31, 2018 (in thousands): At March 31, 2019 At December 31, 2018 Total Assets United States $ 34,860,142 $ 33,178,733 Trinidad 670,563 629,633 Other International (1) 132,830 126,108 Total $ 35,663,535 $ 33,934,474 (1) Other International primarily consists of EOG's China and Canada operations.

Asset Retirement Obligations (T

Asset Retirement Obligations (Tables)	3 Months Ended
	Mar. 31, 2019
Asset Retirement Obligation [Abstract]
Asset Retirement Obligation Rollforward Analysis	The following table presents the reconciliation of the beginning and ending aggregate carrying amounts of short-term and long-term legal obligations associated with the retirement of property, plant and equipment for the three -month periods ended March 31, 2019 and 2018 (in thousands): Three Months Ended 2019 2018 Carrying Amount at January 1 $ 954,377 $ 946,848 Liabilities Incurred 15,360 10,279 Liabilities Settled (1) (24,709 ) 50 Accretion 10,193 8,868 Revisions (9,704 ) (291 ) Foreign Currency Translations 112 245 Carrying Amount at March 31 $ 945,629 $ 965,999 Current Portion $ 26,182 $ 19,177 Noncurrent Portion $ 919,447 $ 946,822 (1) Includes settlements related to asset sales.

Exploratory Well Costs (Tables)

Exploratory Well Costs (Tables)	3 Months Ended
	Mar. 31, 2019
Capitalized Exploratory Well Costs [Abstract]
Net Changes In Capitalized Exploratory Well Costs	EOG's net changes in capitalized exploratory well costs for the three -month period ended March 31, 2019 , are presented below (in thousands): Three Months Ended Balance at January 1 $ 4,121 Additions Pending the Determination of Proved Reserves 9,444 Reclassifications to Proved Properties — Costs Charged to Expense — Balance at March 31 $ 13,565

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value Assets and Liabilities Measured On Recurring Basis	The following table provides fair value measurement information within the fair value hierarchy for certain of EOG's financial assets and liabilities carried at fair value on a recurring basis at March 31, 2019 and December 31, 2018 (in thousands): Fair Value Measurements Using: Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total At March 31, 2019 Financial Assets: Natural Gas Swaps $ — $ 7,974 $ — $ 7,974 Financial Liabilities: Crude Oil Swaps $ — $ 2,124 $ — $ 2,124 Crude Oil Basis Swaps — 2,687 — 2,687 At December 31, 2018 Financial Assets: Crude Oil Basis Swaps $ — $ 23,806 $ — $ 23,806

Risk Management Activities (Tab

Risk Management Activities (Tables)	3 Months Ended
	Mar. 31, 2019
Derivatives, Fair Value [Line Items]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]	The following table sets forth the amounts and classification of EOG's outstanding financial derivative instruments at March 31, 2019 and December 31, 2018 . Certain amounts may be presented on a net basis on the Condensed Consolidated Financial Statements when such amounts are with the same counterparty and subject to a master netting arrangement (in thousands): Fair Value at Description Location on Balance Sheet March 31, 2019 December 31, 2018 Asset Derivatives Crude oil and natural gas derivative contracts - Current portion Assets from Price Risk Management Activities (1) $ 3,909 $ 23,806 Liability Derivatives Crude oil and natural gas derivative contracts - Current portion Liabilities from Price Risk Management Activities (2) $ 746 $ — (1) The current portion of Assets from Price Risk Management Activities consists of gross assets of $7 million , partially offset by gross liabilities of $3 million at March 31, 2019. (2) The current portion of Liabilities from Price Risk Management Activities consists of gross liabilities of $2 million , partially offset by gross assets of $1 million at March 31, 2019 .
Crude Oil | Midland Differential Basis Swaps
Derivatives, Fair Value [Line Items]
Schedule of Derivative Instruments	Presented below is a comprehensive summary of EOG's Midland Differential basis swap contracts for the three months ended March 31, 2019 . The weighted average price differential expressed in dollars per barrel ($/Bbl) represents the amount of reduction to Cushing, Oklahoma, prices for the notional volumes expressed in barrels per day (Bbld) covered by the basis swap contracts. Midland Differential Basis Swap Contracts Volume (Bbld) Weighted Average Price Differential ($/Bbl) 2019 January 1, 2019 through April 30, 2019 (closed) 20,000 $ 1.075 May 1, 2019 through December 31, 2019 20,000 1.075
Crude Oil | Gulf Coast Differential Basis Swap
Derivatives, Fair Value [Line Items]
Schedule of Derivative Instruments	Presented below is a comprehensive summary of EOG's Gulf Coast Differential basis swap contracts for the three months ended March 31, 2019 . The weighted average price differential expressed in $/Bbl represents the amount of addition to Cushing, Oklahoma, prices for the notional volumes expressed in Bbld covered by the basis swap contracts. Gulf Coast Differential Basis Swap Contracts Volume (Bbld) Weighted Average Price Differential ($/Bbl) 2019 January 1, 2019 through April 30, 2019 (closed) 13,000 $ 5.572 May 1, 2019 through December 31, 2019 13,000 5.572
Crude Oil | Price Swaps
Derivatives, Fair Value [Line Items]
Schedule of Derivative Instruments	Presented below is a comprehensive summary of EOG's crude oil price swap contracts for the three months ended March 31, 2019 , with notional volumes expressed in Bbld and prices expressed in $/Bbl. Crude Oil Price Swap Contracts Volume (Bbld) Weighted Average Price ($/Bbl) 2019 April 1, 2019 through December 31, 2019 25,000 $ 60.00
Natural Gas | Price Swaps
Derivatives, Fair Value [Line Items]
Schedule of Derivative Instruments	Presented below is a comprehensive summary of EOG's natural gas price swap contracts for the three months ended March 31, 2019 , with notional volumes expressed in million British thermal units (MMBtu) per day (MMBtud) and prices expressed in dollars per MMBtu ($/MMBtu). Natural Gas Price Swap Contracts Volume (MMBtud) Weighted Average Price ($/MMBtu) 2019 April 2019 (closed) 250,000 $ 2.90 May 1, 2019 through October 31, 2019 250,000 2.90

Leases (Tables)

Leases (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Lease Cost	Variable lease cost represents costs incurred above the contractual minimum payments for operating and finance leases. The components of lease cost were as follows (in millions): Three Months Ended Operating Lease Cost $ 119 Finance Lease Cost: Amortization of Lease Assets 3 Interest on Lease Liabilities 1 Variable Lease Cost 31 Short-Term Lease Cost 71 Total Lease Cost $ 225
Outstanding Lease Assets And Lease Liabilities	The following table sets forth the amounts and classification of EOG's outstanding ROU assets and lease liabilities and supplemental information at March 31, 2019 (in millions, except lease terms and discount rates): Description Location on Balance Sheet Amount Assets Operating Leases Other Assets $ 900 Finance Leases Property, Plant and Equipment, Net (1) 63 Total $ 963 Liabilities Current Operating Leases Current Portion of Operating Lease Liabilities $ 396 Finance Leases Current Portion of Long-Term Debt 15 Long-Term Operating Leases Other Liabilities 529 Finance Leases Long-Term Debt 53 Total $ 993 (1) Finance lease assets are recorded net of accumulated amortization of $50 million at March 31, 2019 .
Weighted Average Remaining Lease Term And Discount Rate	Three Months Ended Weighted Average Remaining Lease Term (in years): Operating Leases 3.3 Finance Leases 5.5 Weighted Average Discount Rate: Operating Leases 3.5 % Finance Leases 3.0 %
Cash Paid for Leases	Cash paid for leases was as follows for the three months ended March 31, 2019 (in millions): Three Months Ended Repayment of Operating Lease Liabilities Associated with Operating Activities $ 52 Repayment of Operating Lease Liabilities Associated with Investing Activities 66 Repayment of Finance Lease Liabilities 3
Operating And Finance Non-Cancellable Leases Maturity	At March 31, 2019 , the future minimum lease payments under non-cancellable leases are as follows (in millions): Operating Leases Finance Leases April 1, 2019 to December 31, 2019 $ 328 $ 11 2020 326 15 2021 145 15 2022 87 12 2023 37 8 2024 and Beyond 62 14 Total Lease Payments 985 75 Less: Discount to Present Value 60 7 Total Lease Liabilities 925 68 Less: Current Portion of Lease Liabilities 396 15 Long-Term Lease Liabilities $ 529 $ 53
Prior To Adoption Operating And Finance Non-Cancellable Leases Maturity		At December 31, 2018 and prior to the adoption of ASU 2016-02 and other related ASUs, the future minimum commitments under non-cancellable leases including non-lease components and excluding contracts with lease terms less than 12 months were as follows (in millions): Operating Leases Finance Leases 2019 $ 380 $ 15 2020 213 15 2021 86 15 2022 39 12 2023 30 8 2024 and Beyond 62 14 Total Lease Payments $ 810 $ 79

Stock-Based Compensation (Detai

Stock-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
		Mar. 31, 2019		Mar. 31, 2018
Stock Options/SARs and Employee Stock Purchase Plan (ESPP) Disclosures [Line Items]
Total Operating Expenses		$ 3,182,112		$ 2,806,574
Stock-Based Compensation Expenses		$ 39,087		35,486
Common Shares Available for Grant		12,900,000
Weighted average period over which unrecognized compensation expense will be recognized (in years)		1 year 10 months 24 days
Stock Options and SARs
Stock Options/SARs and Employee Stock Purchase Plan (ESPP) Disclosures [Line Items]
Stock-based compensation expense related to stock options, SAR and ESPP grants		$ 13,900		$ 12,000
Unrecognized compensation expense	[1]	$ 94,600
Weighted Average Fair Values And Valuation Assumptions Used To Value Stock Option/SARs, ESPP, and Performance Units/Stock Stock-Based Compensation [Abstract]
Weighted Average Fair Value of Grants (price per share)		$ 27.19		$ 28.19
Expected Volatility (in hundredths)		31.81%		29.01%
Risk-Free Interest Rate (in hundredths)		2.51%		2.09%
Dividend Yield (in hundredths)		0.88%		0.66%
Expected Life (in years)		5 years		5 years
Stock Options and SARs Rollforward [Abstract]
Outstanding at January 1 (in shares)		8,310,000		9,103,000
Granted (in shares)		17,000		16,000
Exercised (1) (in shares)	[1]	(43,000)		(752,000)
Forfeited (in shares)		(48,000)		(77,000)
Outstanding at March 31 (2) (in shares)	[2]	8,236,000		8,290,000
Stock Options and SARs Vested or Expected to Vest (3) (in shares)	[3]	7,892,000		7,940,000
Stock Options and SARs Exercisable at March 31 (4) (in shares)	[4]	3,997,000		3,803,000
Intrinsic Value of Stock Options/SARs Exercised	[1]	$ 1,100		$ 28,400
Weighted Average Remaining Contractual Life for Stock Options/SARs Outstanding (in years)		4 years 2 months 12 days		4 years 3 months 18 days
Intrinsic Value of Stock Options/SARs Vested or Expected to Vest	[1]	$ 51,100		$ 166,100
Weighted average remaining contractual life for stock options/SARs vested or expected to vest (in years)		4 years 1 month 6 days		4 years 2 months 12 days
Aggregate Intrinsic Value for Exercisable Units	[1]	$ 43,100		$ 110,800
Weighted average remaining contractual life for exercisable options/SARs (in years)		2 years 8 months 12 days		2 years 7 months 6 days
Weighted Average Grant Price Stock Option and SARs [Rollforward]
Intrinsic Value of Stock Options/SARs Outstanding	[1]	$ 51,800		$ 170,700
Outstanding at January 1 (price per share)		$ 96.90		$ 83.89
Granted (price per share)		96.67		106.76
Exercised (1) (price per share)	[1]	69.94		74.65
Forfeited (price per share)		105.43		91.94
Outstanding at March 31 (2) (price per share)	[2]	96.99		84.70
Vested or Expected to Vest (3) (price per share)	[3]	96.53		84.38
Exercisable at March 31 (4) (price per share)	[4]	86.25		76.16
ESPP
Weighted Average Fair Values And Valuation Assumptions Used To Value Stock Option/SARs, ESPP, and Performance Units/Stock Stock-Based Compensation [Abstract]
Weighted Average Fair Value of Grants (price per share)		$ 22.98		$ 23.27
Expected Volatility (in hundredths)		36.31%		22.04%
Risk-Free Interest Rate (in hundredths)		2.48%		1.60%
Dividend Yield (in hundredths)		0.83%		0.66%
Expected Life (in years)		6 months		6 months
Restricted Stock And Restricted Stock Units
Stock Options/SARs and Employee Stock Purchase Plan (ESPP) Disclosures [Line Items]
Unrecognized compensation expense	[1]	$ 182,800
Weighted average period over which unrecognized compensation expense will be recognized (in years)		1 year 10 months 24 days
Intrinsic value released during the year	[1]	$ 22,000		$ 28,400
Aggregate intrinsic value of stock and units outstanding	[1]	370,200		403,500
Restricted Stock/Restricted Stock Units [Roll Forward]
Share-Based Compensation Arrangement By Restricted Stock And Restricted Stock Units Compensation Cost	[1]	$ 23,300		$ 22,400
Outstanding at January 1 (in shares)		3,792,000		3,905,000
Granted (in shares)		371,000		279,000
Released (1) (in shares)	[5]	(247,000)		(276,000)
Forfeited (in shares)		(26,000)		(75,000)
Outstanding at March 31 (2) (in shares)	[6]	3,890,000		3,833,000
Weighted Average Grant Price Restricted Stock and Restricted Stock Units [Roll Forward]
Outstanding at January 1 (price per share)		$ 96.64		$ 88.57
Granted (price per share)		96.72		102.27
Released (1) (price per share)	[5]	93.37		66.46
Forfeited (price per share)		98.11		90.65
Outstanding at September 30 (2) (price per share)	[6]	$ 96.85		$ 91.12
Performance Unit
Stock Options/SARs and Employee Stock Purchase Plan (ESPP) Disclosures [Line Items]
Stock-Based Compensation Expenses	[1]	$ 1,900		$ 1,100
Unrecognized compensation expense		$ 7,900
Weighted average period over which unrecognized compensation expense will be recognized (in years)		1 year 7 months 6 days
Aggregate intrinsic value of stock and units outstanding		$ 58,100		$ 60,400
Minimum Performance Units and Stock Allowed to be Outstanding		287
Maximum Performance Units and Stock Allowed to be Outstanding		934
Restricted Stock/Restricted Stock Units [Roll Forward]
Outstanding at January 1 (in shares)		539		502
Granted (in shares)		0		0
Granted for Performance Multiple (1)	[7]	72		72
Released (1) (in shares)		0		0
Forfeited (in shares)		0		0
Outstanding at March 31 (2) (in shares)	[8]	611	[9]	574
Weighted Average Grant Price Restricted Stock and Restricted Stock Units [Roll Forward]
Outstanding at January 1 (price per share)		$ 101.53		$ 90.96
Granted (price per share)		0		0
Granted for Performance Multiple (1) (in dollars per share)	[7]	69.43		101.87
Released (1) (price per share)		0		0
Forfeited (price per share)		0		0
Outstanding at September 30 (2) (price per share)	[8]	$ 97.75		$ 92.33
Performance Units and Performance Stock Disclosures [Abstract]
Performance Period for Performance Units and Shares		3 years
Minimum Performance Multiple at the Completion of the Performance Period		0.00%
Maximum Performance Multiple at the Completion of the Performance Period		200.00%
Lease and Well
Stock Options/SARs and Employee Stock Purchase Plan (ESPP) Disclosures [Line Items]
Stock-Based Compensation Expenses		$ 13,700		$ 12,800
Gathering and Processing Costs
Stock Options/SARs and Employee Stock Purchase Plan (ESPP) Disclosures [Line Items]
Stock-Based Compensation Expenses		200		100
Exploration Costs
Stock Options/SARs and Employee Stock Purchase Plan (ESPP) Disclosures [Line Items]
Stock-Based Compensation Expenses		6,500		6,900
General and Administrative
Stock Options/SARs and Employee Stock Purchase Plan (ESPP) Disclosures [Line Items]
Stock-Based Compensation Expenses		$ 18,700		$ 15,700
[1]	The total intrinsic value of stock options/SARs exercised for the three months ended March 31, 2019 and 2018 was $1.1 million and $28.4 million, respectively. The intrinsic value is based upon the difference between the market price of EOG's common stock on the date of exercise and the grant price of the stock options/SARs.
[2]	The total intrinsic value of stock options/SARs outstanding at March 31, 2019 and 2018 was $51.8 million and $170.7 million, respectively. At March 31, 2019 and 2018, the weighted average remaining contractual life was 4.2 years and 4.3 years, respectively.
[3]	The total intrinsic value of stock options/SARs vested or expected to vest at March 31, 2019 and 2018 was $51.1 million and $166.1 million, respectively. At March 31, 2019 and 2018, the weighted average remaining contractual life was 4.1 years and 4.2 years, respectively.
[4]	The total intrinsic value of stock options/SARs exercisable at March 31, 2019 and 2018 was $43.1 million and $110.8 million, respectively. At March 31, 2019 and 2018, the weighted average remaining contractual life was 2.7 years and 2.6 years, respectively.
[5]	The total intrinsic value of restricted stock and restricted stock units released for the three months ended March 31, 2019 and 2018 was $22.0 million and $28.4 million, respectively. The intrinsic value is based upon the closing price of EOG's common stock on the date the restricted stock and restricted stock units are released.
[6]	The total intrinsic value of restricted stock and restricted stock units outstanding at March 31, 2019 and 2018 was $370.2 million and $403.5 million, respectively.
[7]	Upon completion of the Performance Period for the performance units granted in 2015 and 2014, a performance multiple of 200% was applied to each of the grants resulting in additional grants of performance units in February 2019 and February 2018, respectively.
[8]	The total intrinsic value of performance units outstanding at March 31, 2019 and 2018 was approximately $58.1 million and $60.4 million, respectively.
[9]	Upon the application of the relevant performance multiple at the completion of each of the remaining Performance Periods, a minimum of 287 and a maximum of 934 performance units could be outstanding.

Net Income Per Share (Details)

Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Numerator for Basic and Diluted Earnings Per Share - [Abstract]
Net Income	$ 635,426	$ 638,589
Denominator for Basic Earnings Per Share - [Abstract]
Weighted Average Shares	577,207	575,775
Denominator for Diluted Earnings Per Share - [Abstract]
Adjusted Diluted Weighted Average Shares	580,222	579,726
Antidilutive Securities Excluded from Computation of Earnings Per Share [Abstract]
Anti-dilutive Securities excluded from Diluted Earnings Per Share Calculation	4,900	200
Net Income Per Share
Basic	$ 1.10	$ 1.11
Diluted	$ 1.10	$ 1.10
Stock Options And SARs
Potential Dilutive Common Shares - [Abstract]
Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangments	472	1,217
Restricted Stock/Units and Performance Units/Stock [Member]
Potential Dilutive Common Shares - [Abstract]
Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangments	2,543	2,734

Supplemental Cash Flow Inform_3

Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Supplemental Cash Flow Information [Abstract]
Interest (1)	[1]	$ 47,771	$ 50,103
Income Taxes, Net of Refunds Received		(9,307)	3,554
Interest Costs Capitalized		7,000	5,000
Accrued Capital Expenditures		706,000	593,000
Non-Cash Property Exchanges		$ 62,000	9,000
Non-Cash Investing From Other Property, Plant and Equipment			$ 48,000
[1]	Net of capitalized interest of $7 million and $5 million for the three months ended March 31, 2019 and 2018, respectively.

Segment Information (Details)

Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other		$ 4,058,642	$ 3,681,162
Operating Income (Loss)		876,530	874,588
Other Income, Net		5,612	727
Interest Expense, Net		(54,906)	(61,956)
Income Before Income Taxes		827,236	813,359
Total Assets		35,663,535		$ 33,934,474
United States
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other		3,977,019	3,571,134
Operating Income (Loss)		850,900	845,853
Total Assets		34,860,142		33,178,733
Trinidad
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other		69,868	81,013
Operating Income (Loss)		38,832	40,297
Total Assets		670,563		629,633
Other International
Schedule of Segment Reporting Information By Segment [Abstract]
Operating Revenues and Other	[1]	11,755	29,015
Operating Income (Loss)	[1]	(13,202)	$ (11,562)
Total Assets	[1]	$ 132,830		$ 126,108
[1]	Other International primarily consists of EOG's United Kingdom, China and Canada operations. The United Kingdom operations were sold in the fourth quarter of 2018.

Asset Retirement Obligations (D

Asset Retirement Obligations (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Asset Retirement Obligation [Abstract]
Carrying Amount at January 1		$ 954,377	$ 946,848
Liabilities Incurred		15,360	10,279
Liabilities Settled (1)	[1]	(24,709)	50
Accretion		10,193	8,868
Revisions		(9,704)	(291)
Foreign Currency Translations		112	245
Carrying Amount at March 31		945,629	965,999
Current Portion		26,182	19,177
Noncurrent Portion		$ 919,447	$ 946,822
[1]	Includes settlements related to asset sales.

Exploratory Well Costs (Details

Exploratory Well Costs (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)
Capitalized Exploratory Well Costs that are Pending Determination of Proved Reserves [Roll Forward]
Balance at January 1	$ 4,121
Additions Pending the Determination of Proved Reserves	9,444
Reclassifications to Proved Properties	0
Costs Charged to Expense	0
Balance at March 31	$ 13,565

Pension and Postretirement Be_2

Pension and Postretirement Benefits (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Defined Benefit and Defined Contribution Plan Disclosure [Line Items]
Total Pension Plans Costs	$ 12	$ 9.9

Long-Term Debt and Common Sto_2

Long-Term Debt and Common Stock (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Debt Instrument [Abstract]
Dividends Common Stock Declared Per Share	$ 0.22
Dividends Payable, Amount Per Share After Increase	$ 0.2875
Commercial Paper [Member]
Line of Credit Facility [Line Items]
Borrowings Outstanding	$ 0		$ 0
Average Outstanding Amount		$ 18,000,000
Weighted average interest rate (in hundredths)		1.76%
Uncommitted Credit Facility [Member]
Line of Credit Facility [Line Items]
Borrowings Outstanding	0		0
Revolving Credit Agreement 2020 [Member]
Line of Credit Facility [Line Items]
Borrowings Outstanding	0		$ 0
Line of Credit Facility, Maximum Borrowing Capacity	$ 2,000,000,000
Line of Credit Facility, Expiration Date	Jul. 21, 2020
Maximum Total Debt To Total Capitalization Ratio Allowed Under Financial Covenant	65.00%
Eurodollar [Member]
Line of Credit Facility [Line Items]
Weighted average interest rate (in hundredths)	3.50%
Base Rate [Member]
Line of Credit Facility [Line Items]
Weighted average interest rate (in hundredths)	5.50%

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Proved Oil and Gas Properties, Other Property, Plant and Equipment and Other Assets [Abstract]
Proved Oil and Gas Properties and Other Assets Carrying Amount	$ 208,000
Proved Oil and Gas Properties and Other Assets Written Down During the Period - Fair value at End of Period	183,000
Pretax Impairment Charges for Proved Oil and Gas Properties and Other Assets	25,000
Pretax Impairment Charge for a Commodity Price-Related Write-Down of Other Assets	24,000
Debt Disclosure [Abstract]
Aggregate Principal Amount of Current and Long-Term Debt	6,040,000	$ 6,040,000
Estimated Fair Value of Debt	6,168,000	6,027,000
Commodity Contract [Member] | Crude Oil | Price Swaps
Financial Liabilities:
Financial and Nonfinancial Liabilities, Fair Value Disclosure	2,124
Commodity Contract [Member] | Crude Oil | Price Swaps | Fair Value, Inputs, Level 1 [Member]
Financial Liabilities:
Financial and Nonfinancial Liabilities, Fair Value Disclosure	0
Commodity Contract [Member] | Crude Oil | Price Swaps | Fair Value, Inputs, Level 2 [Member]
Financial Liabilities:
Financial and Nonfinancial Liabilities, Fair Value Disclosure	2,124
Commodity Contract [Member] | Crude Oil | Price Swaps | Fair Value, Inputs, Level 3 [Member]
Financial Liabilities:
Financial and Nonfinancial Liabilities, Fair Value Disclosure	0
Commodity Contract [Member] | Crude Oil | Basis Swaps
Financial Liabilities:
Financial and Nonfinancial Liabilities, Fair Value Disclosure	2,687	23,806
Commodity Contract [Member] | Crude Oil | Basis Swaps | Fair Value, Inputs, Level 1 [Member]
Financial Liabilities:
Financial and Nonfinancial Liabilities, Fair Value Disclosure	0	0
Commodity Contract [Member] | Crude Oil | Basis Swaps | Fair Value, Inputs, Level 2 [Member]
Financial Liabilities:
Financial and Nonfinancial Liabilities, Fair Value Disclosure	2,687	23,806
Commodity Contract [Member] | Crude Oil | Basis Swaps | Fair Value, Inputs, Level 3 [Member]
Financial Liabilities:
Financial and Nonfinancial Liabilities, Fair Value Disclosure	0	$ 0
Commodity Contract [Member] | Natural Gas | Price Swaps
Financial Assets: [Abstract]
Assets, Fair Value Disclosure	7,974
Commodity Contract [Member] | Natural Gas | Price Swaps | Fair Value, Inputs, Level 1 [Member]
Financial Assets: [Abstract]
Assets, Fair Value Disclosure	0
Commodity Contract [Member] | Natural Gas | Price Swaps | Fair Value, Inputs, Level 2 [Member]
Financial Assets: [Abstract]
Assets, Fair Value Disclosure	7,974
Commodity Contract [Member] | Natural Gas | Price Swaps | Fair Value, Inputs, Level 3 [Member]
Financial Assets: [Abstract]
Assets, Fair Value Disclosure	$ 0

Risk Management Activities (Det

Risk Management Activities (Details)		3 Months Ended
		Mar. 31, 2019USD ($)MMBTU$ / bbl$ / MMBTUbbl	Dec. 31, 2018USD ($)
Derivatives, Fair Value [Line Items]
Assets from Price Risk Management Activities		$ 3,909,000	$ 23,806,000
Liabilities from Price Risk Management Activities		746,000	0
Derivative Collateral [Abstract]
Collateral Had on Derivative		0	0
Collateral Held on Derivative		0	0
Liabilities From Price Risk Management Activities
Derivatives, Fair Value [Line Items]
Assets from Price Risk Management Activities		1,000,000
Liabilities from Price Risk Management Activities		2,000,000
Liabilities From Price Risk Management Activities | Price Risk Derivative [Member]
Derivatives, Fair Value [Line Items]
Liabilities from Price Risk Management Activities	[1]	746,000	0
Assets From Price Risk Management Activities
Derivatives, Fair Value [Line Items]
Assets from Price Risk Management Activities		7,000,000
Liabilities from Price Risk Management Activities		3,000,000
Assets From Price Risk Management Activities | Price Risk Derivative [Member]
Derivatives, Fair Value [Line Items]
Assets from Price Risk Management Activities	[2]	$ 3,909,000	$ 23,806,000
Crude Oil | Midland Differential Basis Swaps | Derivative Contracts - January through April (closed) [Member]
Derivatives, Fair Value [Line Items]
Volume (Bbld) | bbl		20,000
Derivative, Swap Type, Average Fixed Price | $ / bbl		1.075
Crude Oil | Midland Differential Basis Swaps | Derivative Contracts - May through December [Member]
Derivatives, Fair Value [Line Items]
Volume (Bbld) | bbl		20,000
Derivative, Swap Type, Average Fixed Price | $ / bbl		1.075
Crude Oil | Gulf Coast Differential Basis Swap | Derivative Contracts - January through April (closed) [Member]
Derivatives, Fair Value [Line Items]
Volume (Bbld) | bbl		13,000
Derivative, Swap Type, Average Fixed Price | $ / bbl		5.572
Crude Oil | Gulf Coast Differential Basis Swap | Derivative Contracts - May through December [Member]
Derivatives, Fair Value [Line Items]
Volume (Bbld) | bbl		13,000
Derivative, Swap Type, Average Fixed Price | $ / bbl		5.572
Crude Oil | Price Swaps | Derivative Contracts - January through September (closed) [Member]
Derivatives, Fair Value [Line Items]
Volume (Bbld) | bbl		25,000
Derivative, Swap Type, Average Fixed Price | $ / bbl		60
Natural Gas | Price Swaps | Derivative Contracts - April (closed) [Member]
Derivatives, Fair Value [Line Items]
Derivative, Swap Type, Average Fixed Price | $ / MMBTU		2.90
Volume (MMBtud) | MMBTU		250,000
Natural Gas | Price Swaps | Derivative Contracts - May through October [Member]
Derivatives, Fair Value [Line Items]
Derivative, Swap Type, Average Fixed Price | $ / MMBTU		2.90
Volume (MMBtud) | MMBTU		250,000
[1]	The current portion of Liabilities from Price Risk Management Activities consists of gross liabilities of $2 million, partially offset by gross assets of $1 million at March 31, 2019.
[2]	The current portion of Assets from Price Risk Management Activities consists of gross assets of $7 million, partially offset by gross liabilities of $3 million at March 31, 2019.

Acquisitions and Divestitures_2

Acquisitions and Divestitures (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Discontinued Operations and Disposal Groups [Abstract]
Proved oil and gas properties carrying amount	$ 303,000
Gains (Losses) on Asset Dispositions, Net	(3,836)	$ (14,969)
Proceeds on Asset Dispositions	$ 15,049	$ 2,829

Leases (Details)

Leases (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Lease Cost [Abstract]
Operating Lease Cost		$ 119,000
Amortization of Lease Assets		3,000
Interest on Lease Liabilities		1,000
Variable Lease Cost		31,000
Short-Term Lease Cost		71,000
Total Lease Cost		225,000
Lease Assets and Liabilities [Abstract]
Right-of-Use Assets			$ 566,000
Total		963,000
Current Liabilities		396,294		$ 0
Total		993,000
Finance Lease Net of Accumulated Amortization		33,840,631		33,475,162
Cash Flow Operating And Financing Activities [Abstract]
Operating Leases Non-Cash Leasing Activities		450,000
Operating And Finance Leases Future Minimum Payments [Abstract]
Operating and Finance Leases Not Yet Commenced		752,000
Operating and Finance Leases Liabilities Not Yet Commenced Due in the Remainder of 2019		118,000
Operating and Finance Leases Liabilities Not Yet Commenced Payments Due 2020		429,000
Operating and Finance Leases Liabilities Not Yet Commenced Payments Due 2021		205,000
Operating Leases
Lease Assets and Liabilities [Abstract]
Current Liabilities		396,000
Long-Term Liabilities		$ 529,000
Weighted Average Remaining Lease Term And Discount Rate [Abstract]
Operating Lease Weighted Average Remaining Lease Term (in years)		3 years 3 months 18 days
Operating Lease Weighted Average Discount Rate (%)		3.50%
Operating And Finance Leases Future Minimum Payments [Abstract]
April 1, 2019 to December 31, 2019		$ 328,000
2020		326,000
2021		145,000
2022		87,000
2023		37,000
2024 and Beyond		62,000
Total Lease Payments		985,000
Less: Discount to Present Value		60,000
Total Lease Liabilities		925,000
Operating Leases Future Minimum Payments Due [Abstract]
2019				380,000
2020				213,000
2021				86,000
2022				39,000
2023				30,000
2024 and Beyond				62,000
Total Lease Payments				810,000
Operating Leases | Operating Activities
Cash Flow Operating And Financing Activities [Abstract]
Repayment of Operating Lease Liabilities		52,000
Operating Leases | Investing Activities
Cash Flow Operating And Financing Activities [Abstract]
Repayment of Operating Lease Liabilities		66,000
Finance Leases
Lease Assets and Liabilities [Abstract]
Current Liabilities		15,000
Long-Term Liabilities		$ 53,000
Weighted Average Remaining Lease Term And Discount Rate [Abstract]
Finance Lease Weighted Average Remaining Lease Term (in years)		5 years 6 months
Finance Lease Weighted Average Discount Rate (%)		3.00%
Cash Flow Operating And Financing Activities [Abstract]
Repayment of Finance Lease Liabilities		$ 3,000
Operating And Finance Leases Future Minimum Payments [Abstract]
April 1, 2019 to December 31, 2019		11,000
2020		15,000
2021		15,000
2022		12,000
2023		8,000
2024 and Beyond		14,000
Total Lease Payments		75,000
Less: Discount to Present Value		7,000
Total Lease Liabilities		68,000
Finance Leases Future Minimum Payments Due [Abstract]
2019				15,000
2020				15,000
2021				15,000
2022				12,000
2023				8,000
2024 and Beyond				14,000
Total Lease Payments				$ 79,000
Other Assets | Operating Leases
Lease Assets and Liabilities [Abstract]
Right-of-Use Assets		900,000
Property, Plant and Equipment, Net (1)
Lease Assets and Liabilities [Abstract]
Finance Lease Net of Accumulated Amortization		50,000
Property, Plant and Equipment, Net (1) | Finance Leases
Lease Assets and Liabilities [Abstract]
Right-of-Use Assets	[1]	63,000
Current Portion of Operating Lease Liabilities | Operating Leases
Lease Assets and Liabilities [Abstract]
Current Liabilities		396,000
Current Portion of Long-Term Debt | Finance Leases
Lease Assets and Liabilities [Abstract]
Current Liabilities		15,000
Other Liabilities | Operating Leases
Lease Assets and Liabilities [Abstract]
Long-Term Liabilities		529,000
Long-term Debt | Finance Leases
Lease Assets and Liabilities [Abstract]
Long-Term Liabilities		$ 53,000
Minimum
Operating And Finance Leases Future Minimum Payments [Abstract]
Operating and Finance Leases Not Yet Commenced Lease Term		1 month
Maximum
Operating And Finance Leases Future Minimum Payments [Abstract]
Operating and Finance Leases Not Yet Commenced Lease Term		10 years
[1]	Finance lease assets are recorded net of accumulated amortization of $50 million at March 31, 2019.