ConocoPhillips (COP) 10-Q 3 Nov 20 2020 Q3 Quarterly report Financial data

Cover

Cover	9 Months Ended
	Sep. 30, 2020shares
Cover [Abstract]
Entity Central Index Key	0001163165
Amendment Flag	false
Entity File Number	001-32395
Entity Registrant Name	ConocoPhillips
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Sep. 30, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Incorporation State or Country Code	DE
Entity Tax Identification Number	01-0562944
Entity Address, Address Line One	925 N. Eldridge Parkway
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77079
City Area Code	281
Local Phone Number	293-1000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	1,072,741,643
Common Stock, $.01 Par Value [Member]
Entity Listings [Line Items]
Title of 12(b) Security	Common Stock, $.01 Par Value
Trading Symbol	COP
Security Exchange Name	NYSE
7% Debentures due 2029 [Member]
Entity Listings [Line Items]
Title of 12(b) Security	7% Debentures due 2029
Trading Symbol	CUSIP—718507BK1
Security Exchange Name	NYSE

Consolidated Income Statement

Consolidated Income Statement - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues and Other Income
Sales and other operating revenues	$ 4,386	$ 7,756	$ 13,293	$ 24,859
Equity in earnings (losses) of affiliates	35	290	346	651
Gain (loss) on dispositions	(3)	1,785	551	1,884
Other income (loss)	(38)	262	(983)	1,136
Total Revenues and Other Income	4,380	10,093	13,207	28,530
Costs and Expenses
Purchased commodities	1,839	2,710	5,630	9,059
Production and operating expenses	963	1,331	3,183	4,020
Selling, general and administrative expenses	96	87	249	369
Exploration expenses	125	360	410	592
Depreciation, depletion and amortization	1,411	1,566	3,980	4,602
Impairments	2	24	521	26
Taxes other than Income Taxes	179	237	570	706
Accretion on discounted liabilities	62	86	195	259
Interest and debt expense	200	184	604	582
Foreign currency transaction (gain) loss	(5)	(21)	(88)	19
Other Expense	20	36	7	58
Total Costs and Expenses	4,892	6,600	15,261	20,292
Income (loss) before income taxes	(512)	3,493	(2,054)	8,238
Income tax provision (benefit)	(62)	422	(171)	1,724
Net income (loss)	(450)	3,071	(1,883)	6,514
Less: net income attributable to noncontrolling interests	0	(15)	(46)	(45)
Net Income (Loss) Attributable to ConocoPhillips	$ (450)	$ 3,056	$ (1,929)	$ 6,469
Earnings Per Share, Basic [Abstract]
Earnings Per Share, Basic	$ (0.42)	$ 2.76	$ (1.79)	$ 5.75
Earnings Per Share, Diluted [Abstract]
Earnings Per Share, Diluted	$ (0.42)	$ 2.74	$ (1.79)	$ 5.72
Average Common Shares Outstanding (in thousands)
Basic	1,077,377	1,108,555	1,079,525	1,124,558
Diluted	1,077,377	1,113,250	1,079,525	1,131,034

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Consolidated Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (450)	$ 3,071	$ (1,883)	$ 6,514
Defined benefit plans
Reclassification adjustment for amortization of prior service cost (credit) included in net income	(8)	(8)	(24)	(26)
Net actuarial loss arising during the period	(78)	(149)	(73)	(149)
Reclassification adjustment for amortization of net actuarial losses included in net income (loss)	45	56	81	114
Nonsponsored plans	0	(1)	0	(1)
Income taxes on defined benefit plans	10	30	3	20
Defined benefit plans, net of tax	(31)	(72)	(13)	(42)
Unrealized holding gain on securities	0	0	3	0
Income taxes on unrealized holding gain on securities	0	0	(1)	0
Unrealized holding loss on securities, net of tax	0	0	2	0
Foreign currency translation adjustments	188	247	(302)	493
Income taxes on foreign currency translation	2	(2)	4	(2)
Foreign currency translation adjustments, net of tax	190	245	(298)	491
Other Comprehensive Income (Loss), Net of Tax	159	173	(309)	449
Comprehensive Income (Loss)	(291)	3,244	(2,192)	6,963
Less: comprehensive income attributable to noncontrolling interests	0	(15)	(46)	(45)
Comprehensive Income (Loss) Attributable to ConocoPhillips	$ (291)	$ 3,229	$ (2,238)	$ 6,918

Consolidated Balance Sheet

Consolidated Balance Sheet - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Assets
Cash and cash equivalents	$ 2,490	$ 5,088
Short-term investments	4,032	3,028
Accounts and notes receivable (net of allowance of $4 and $13, respectively)	1,984	3,267
Accounts and notes receivable-related parties	135	134
Investment in Cenovus Energy	809	2,111
Inventories	1,034	1,026
Prepaid expenses and other current assets	575	2,259
Total Current Assets	11,059	16,913
Investments and long-term receiavables	8,295	8,687
Loans and advances-related parties	114	219
Net properties, plants and equipment (net of accumulated DD&A of $58,726 and $55,477, respectively)	41,269	42,269
Other assets	2,420	2,426
Total Assets	63,157	70,514
Liabilities
Accounts payable	2,217	3,176
Accounts payable-related parties	22	24
Short-term debt	482	105
Accrued income and other taxes	339	1,030
Employee benefit obligations	469	663
Other accruals	1,111	2,045
Total Current Liabilities	4,640	7,043
Long-term debt	14,905	14,790
Asset retirement obligations and accrued environmental costs	5,651	5,352
Deferred income taxes	3,854	4,634
Employee benefit obligations	1,661	1,781
Other liabilities and deferred credits	1,663	1,864
Total Liabilities	32,374	35,464
Equity
Common stock (2,500,000,000 shares authorized at $0.01 par value) Issued (2020-1,798,738,512 shares; 2019-1,795,652,203 shares) Par value	18	18
Capital in excess of par	47,113	46,983
Treasury stock (at cost: 2020-725,996,869 shares; 2019-710,783,814 shares)	(47,130)	(46,405)
Accumulated other comprehensive loss	(5,666)	(5,357)
Retained earnings	36,448	39,742
Total Common Stockholders' Equity	30,783	34,981
Noncontrolling interests	0	69
Total Equity	30,783	35,050
Total Liabilities and Equity	$ 63,157	$ 70,514

Consolidated Balance Sheet (Par

Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Consolidated Balance Sheet [Abstract]
Allowance for accounts and notes receivable	$ 4	$ 13
Accumulated depreciation, depletion and amortization	$ 58,726	$ 55,477
Common stock, shares authorized	2,500,000,000	2,500,000,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares issued	1,798,738,512	1,795,652,203
Treasury stock, shares	725,996,869	710,783,814

Consolidated Statement of Cash

Consolidated Statement of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash Flows From Operating Activities
Net income (loss)	$ (1,883)	$ 6,514
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Depreciation, depletion and amortization	3,980	4,602
Impairments	521	26
Dry hole costs and leasehold impairments	114	361
Accretion on discounted liabilities	195	259
Deferred taxes	(428)	(304)
Distributions received greater than equity losses (undistributed equity earnings)	450	260
Gain on dispositions	(551)	(1,884)
Unrealized (gain) loss on investment in Cenovus Energy	1,302	(489)
Other	(188)	(331)
Working capital adjustments
Decrease in accounts and notes receivable	1,132	333
Increase in inventories	(74)	(2)
Increase in prepaid expenses and other current assets	(49)	(29)
Decrease in accounts payable	(583)	(476)
Decrease in taxes and other accruals	(808)	(718)
Net cash provided by operating activities	3,130	8,122
Cash Flows From Investing Activities
Capital expenditures and investments	(3,657)	(5,041)
Working capital changes associated with investing activities	(229)	17
Proceeds from asset dispositions	1,312	2,920
Net purchases of investments	(1,089)	(665)
Collection of advances/loans-related parties	116	127
Other	(31)	(146)
Net Cash Used in Investing Activities	(3,578)	(2,788)
Cash Flows From Financing Activities
Issuance of debt	300	0
Repayment of debt	(234)	(59)
Issuance of company common stock	(2)	(39)
Repurchase of company common stock	(726)	(2,751)
Dividends paid	(1,367)	(1,037)
Other	(27)	(73)
Net Cash Used in Financing Activities	(2,056)	(3,959)
Effect of Exchange Rate Changes on Cash and Cash Equivalents and Restricted Cash	(62)	(68)
Net Change in Cash and Cash Equivalents and Restricted Cash Increase (Decrease)	(2,566)	1,307
Cash and Cash Equivalents and Restricted Cash at beginning of period	5,362	6,151
Cash and Cash Equivalents and Restricted Cash at end of period	$ 2,796	$ 7,458

Consolidated Statement of Cas_2

Consolidated Statement of Cash Flows - Restricted Cash	9 Months Ended
	Sep. 30, 2020
Consolidated Statement of Cash Flows [Abstract]
Consolidated Statement of Cash Flows - Restricted Cash	Restricted cash of $ 91 215 respectively, of our Consolidated Balance Sheet as of September 30, 2020. Restricted cash of $ 90 184 respectively, of our Consolidated Balance Sheet as of December 31, 2019. See Notes to Consolidated Financial Statements.

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2020
Basis of Presentation [Abstract]
Business Description and Basis of Presentation [Text Block]	Note 1—Basis of Presentation The interim-period financial information unaudited and, in the opinion of management, presentation of the consolidated financial flows for such periods. Certain notes and other information have been included in this report. consolidated financial statements and notes included The unrealized (gain) loss on investment in Cenovus flows, previously reflected on the line item reclassified in the comparative period to conform

Change in Accounting Principles

Change in Accounting Principles	9 Months Ended
	Sep. 30, 2020
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Significant Accounting Policies [Text Block]	Note 2—Changes in Accounting Principles We adopted FASB ASU No. 2016-13 , “Measurement of Credit Losses on Financial Instruments,” (ASC Topic 326) and its amendments, beginning January 1, 2020 . forth the current expected credit loss model, instruments measured at amortized cost basis as amended, which primarily applies to our accounts for-sale debt securities to be recorded through an allowance The adoption of this ASU did not have a material impact to our financial statements. or less. other analyses. analyses of historical loss rates as well as consideration counterparties’ credit quality and liquidity.

Inventories

Inventories	9 Months Ended
	Sep. 30, 2020
Inventories [Abstract]
Inventories	Note 3—Inventories Inventories consisted of the following: Millions of Dollars September 30 2020 2019 Crude oil and natural gas $ 503 472 Materials and supplies 531 554 $ 1,034 1,026 Inventories valued on the LIFO basis totaled 373 286 December 31, 2019, respectively. year, we recorded a lower of cost or market adjustment in the first 228 oil and natural gas inventories. The adjustment consolidated income statement.

Asset Acquisitions and Disposit

Asset Acquisitions and Dispositions	9 Months Ended
	Sep. 30, 2020
Asset Acquisitions and Dispositions [Abstract]
Asset Acquisitions and Dispositions [Text Block]	Note 4—Asset Acquisitions and Dispositions Asset Acquisition In August 2020, we completed the acquisition Ltd. for $ 382 31 associated with partially owned infrastructure. and included 140,000 adjacent to our existing Montney position. 295,000 net acres with a 100 resulting in the recognition of $ 490 77 and $ 31 Montney are reported in our Canada segment. Assets Sold In May 2020, we completed the divestiture operations, and based on an effective date of January 765 additional $ 200 the nine-month period of 2020, we recognized a before-tax 587 the time of disposition, the net carrying value of 0.2 excluding $ 0.5 1.3 0.1 billion of other current assets offset by $ 0.7 0.3 0.2 billion of other liabilities. disposition noted above, were $ 851 222 2020 and 2019, respectively. 2020 averaged 43 Asia Pacific segment. In March 2020, we completed the sale of our Niobrara 359 customary adjustments and recognized a before-tax 38 disposition, our interest in Niobrara had a net carrying 397 433 million of PP&E and $ 34 including the loss on disposition, were a loss of $ 22 7 September 30, 2020 and 2019, respectively. In February 2020, we sold our Waddell Ranch interests in the Permian Basin for $ 184 adjustments. No Production from the disposed Niobrara and Waddell Ranch interests in our Lower 48 15 MBOED in 2019.

Investments, Loans and Long-Ter

Investments, Loans and Long-Term Receivables	9 Months Ended
	Sep. 30, 2020
Investments, Loans and Long-Term Receivables [Abstract]
Investments, Loans and Long-Term Receivables	Note 5—Investments, Loans and Long-Term Receivables Australia Pacific LNG Pty Ltd (APLNG) APLNG executed project financing agreements 8.5 8.5 billion project finance facility was initially composed Export-Import Bank of the United States for approximately 2.9 approximately $ 2.7 approximately $ 2.9 interest repayment in March 2017 and is scheduled bi-annual March 2029 . APLNG made a voluntary repayment of $ 1.4 At the same time, APLNG obtained a United 1.4 APLNG made its first interest payment related to scheduled to commence in September 2023, with bi-annual September 2030 . During the first quarter of 2019, APLNG refinanced 3.2 transactions. 2.6 APLNG made its first principal and interest bi-annual facility until March 2028 . 0.6 billion. commence in September 2023, with bi-annual In conjunction with the $ 3.2 finance debt, APLNG made voluntary repayments 2.2 1.0 and international commercial banks and the Export-Import At September 30, 2020, a balance of $ 6.2 for additional information. At September 30, 2020, the carrying value of our 6,877 The balance is included in the “Investments Loans and Long-Term Receivables As part of our normal ongoing business operations, numerous agreements with other parties to pursue made to certain affiliated and non-affiliated companies. companies included $ 219 On our consolidated balance sheet, the long-term advances—related parties” line, while the short-term parties” line.

Investment in Cenovus Energy

Investment in Cenovus Energy	9 Months Ended
	Sep. 30, 2020
Investment In Cenovus Energy [Abstract]
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	Note 6—Investment in Cenovus Energy On May 17, 2017, we completed the sale of our 50 well as the majority of our western Canada gas assets, included 208 16.9 and outstanding Cenovus Energy common stock. 208 million Cenovus Energy common shares was $ 1.96 9.41 the closing date. At September 30, 2020, the investment included on 809 carried at fair value. 208 price of $ 3.89 1.30 fair value of $ 2.11 we recorded an unrealized loss of $ 162 1.30 periods ended September 30, 2019, we recorded 116 489 respectively. consolidated income statement and are related to the Value investment over time through market transactions,

Suspended Wells

Suspended Wells	9 Months Ended
	Sep. 30, 2020
Suspended Wells [Abstract]
Suspended Wells	Note 7—Suspended Wells The capitalized cost of suspended wells at September 711 309 from year-end 2019 primarily related to our Australia-West divestiture. Dispositions, 31, 2019, $ 20 one suspended well in the Kamunsu East Field offshore Malaysia.

Impairments

Impairments	9 Months Ended
	Sep. 30, 2020
Impairments [Abstract]
Impairments	Note 8—Impairments During the three- impairment charges within the following segments: Millions of Dollars Nine Months Ended September 30 September 30 2020 2019 2020 2019 Lower 48 $ 1 22 514 22 Europe, Middle East and North Africa 1 2 7 4 $ 2 24 521 26 We perform impairment reviews when triggering events arise that may impact the investments. We observed volatility in commodity prices during the first nine-months of 2020. prices beginning in March prompted us to evaluate whether an other than temporary impairment natural gas assets in the Lower 48, a significant decrease prices resulted in a decline in the estimated fair first quarter of 2020, we recorded impairments of 511 primarily for the Wind River Basin operations area consisting of the Lost Cabin Gas Plant, which were written down additional information. A sustained decline in the current and long-term impairment reviews and possibly result in The charges discussed below are included in the “Exploration statement and are not reflected in the table above. We recorded a before-tax impairment in the first quarter of 2020 of $ 31 related to the associated carrying value of capitalized in Malaysia that is no longer in our development In the third quarter of 2019, we recorded a before-tax 141 the associated carrying value of capitalized undeveloped exploration activities in the Central Louisiana Austin

Debt

Debt	9 Months Ended
	Sep. 30, 2020
Debt [Abstract]
Debt	Note 9—Debt Our debt balance as of September 30, 2020 was $ 15,387 14,895 31, 2019. Our revolving credit facility provides a total commitment 6.0 May 2023 . revolving credit facility may be used for direct $ 500 ConocoPhillips Company $ 6.0 needs. 90 days . We issued $ 300 on our consolidated balance sheet. 300 no borrowings or letters of credit, we had $ 5.7 September 30, 2020. no paper as of December 31, 2019. In October 2020, S&P affirmed its “A” rating on our senior long-term debt and revised its outlook to “stable” from “negative,” Fitch affirmed its rating of “A” with a “stable” outlook and Moody’s affirmed its rating of “A3” with a “stable” outlook. At September 30, 2020, we had $ 283 maturities ranging through 2035. day. VRDBs are included in the “Long-term debt” line

Changes in Equity

Changes in Equity	9 Months Ended
	Sep. 30, 2020
Stockholders' Equity Note [Abstract]
Stockholders' Equity Note Disclosure [Text Block]	Note 10—Changes in Equity Millions of Dollars Attributable to ConocoPhillips Common Stock Par Value Capital in Excess of Par Treasury Stock Accum. Other Comprehensive Income (Loss) Retained Earnings Non- Controlling Interests Total For the three months ended September 30, 2020 Balances at June 30, 2020 $ 18 47,079 (47,130) (5,825) 37,351 31,493 Net loss (450) (450) Other comprehensive income 159 159 Dividends paid ($ 0.42 (454) (454) Distributed under benefit plans 34 34 Other 1 1 Balances at September 30, 2020 $ 18 47,113 (47,130) (5,666) 36,448 30,783 For the nine months ended September 30, Balances at December 31, 2019 $ 18 46,983 (46,405) (5,357) 39,742 69 35,050 Net income (loss) (1,929) 46 (1,883) Other comprehensive loss (309) (309) Dividends paid ($ 1.26 (1,367) (1,367) Repurchase of company common stock (726) (726) Distributions to noncontrolling interests and other (32) (32) Disposition (84) (84) Distributed under benefit plans 130 130 Other 1 2 1 4 Balances at September 30, 2020 $ 18 47,113 (47,130) (5,666) 36,448 - 30,783 Millions of Dollars Attributable to ConocoPhillips Common Stock Par Value Capital in Excess of Par Treasury Stock Accum. Other Comprehensive Income (Loss) Retained Earnings Non- Controlling Interests Total For the three months ended September 30, 2019 Balances at June 30, 2019 $ 18 46,922 (44,906) (5,827) 36,769 98 33,074 Net income 3,056 15 3,071 Other comprehensive income 173 173 Dividends paid ($ 0.31 (341) (341) Repurchase of company common stock (749) (749) Distributions to noncontrolling interests and other (20) (20) Distributed under benefit plans 32 32 Other (1) (1) Balances at September 30, 2019 $ 18 46,954 (45,656) (5,654) 39,484 93 35,239 For the nine months ended September 30, Balances at December 31, 2018 $ 18 46,879 (42,905) (6,063) 34,010 125 32,064 Net income 6,469 45 6,514 Other comprehensive income 449 449 Dividends paid ($ 0.92 (1,037) (1,037) Repurchase of company common stock (2,751) (2,751) Distributions to noncontrolling interests and other (80) (80) Distributed under benefit plans 75 75 Changes in Accounting Principles* (40) 40 - Other 2 3 5 Balances at September 30, 2019 $ 18 46,954 (45,656) (5,654) 39,484 93 35,239 *Cumulative effect of the adoption of ASU No. 2018-02,

Guarantees

Guarantees	9 Months Ended
	Sep. 30, 2020
Guarantees [Abstract]
Guarantees	Note 11—Guarantees At September 30, 2020, we were liable for certain arrangements as described below. a guarantor for newly issued or modified guarantees. below, we have not recognized a liability because the fair value of the obligation unless otherwise stated, we are not currently future performance to be either immaterial APLNG Guarantees At September 30, 2020, we had outstanding multiple 37.5 interest in APLNG. September 2020 exchange rates: ● During the third quarter of 2016, we issued a guarantee portion of the funds in a project finance reserve guarantee is 10 years . 170 and may become payable if an enforcement action against APLNG. 14 million. ● In conjunction with our original purchase of an ownership October 2008, we agreed to reimburse Origin Energy for arising under guarantees of an existing obligation agreements with remaining terms of 1 to 22 years . payments, or cost of volume delivery, under these guarantees is estimated 720 ($ 1.3 to meet its obligations under these agreements and Future payments are considered unlikely, as the payments, or cost of volume triggered if APLNG does not have enough natural co-venturers do not make necessary equity contributions ● We have guaranteed the performance of APLNG with regard to certain other contracts connection with the project’s continued development. 16 to 25 years or the life of the venture . guarantees is approximately $ 120 September 30, 2020, the carrying value of these 7 Other Guarantees We have other guarantees with maximum future potential payment amounts totaling $ 750 of the residual value of corporate aircrafts, reserve accounts. 1 to 5 years asset values are lower than guaranteed amounts at decline at guaranteed entities, or as a result of nonperformance At September 30, 2020, the carrying value of these 11 Indemnifications Over the years, we have entered into agreements to ventures and assets that gave rise to qualifying for taxes and environmental liabilities. majority of these expire in 2021. and the maximum amounts of future payments are these indemnification obligations at September 30, 50 indemnification liability over the relevant time facts and circumstances surrounding each type indefinite, we will reverse the liability when we have amortize the liability over an appropriate time declines. of the indemnifications, it is not possible to make future payments. Commitments.

Contingencies and Commitments

Contingencies and Commitments	9 Months Ended
	Sep. 30, 2020
Contingencies and Commitments [Abstract]
Contingencies and Commitments	Note 12—Contingencies and Commitments A number of lawsuits involving a variety of claims against ConocoPhillips. placement, storage, disposal or release of certain and inactive sites. contingencies. liability when the loss is probable and the amount reasonably estimated and no amount within the range end of the range is accrued. We accrue receivables for insurance or other third-party recoveries when applicable. tax-related contingencies, we use a cumulative probability-weighted tax position is less than certain. Based on currently available information, we believe liability exposures will exceed current accruals by consolidated financial statements. both with respect to accrued liabilities changes include contingent liabilities Estimated future environmental remediation magnitude of cleanup costs, the unknown time the determination of our liability in proportion related to tax and legal matters are subject to available during the administrative and litigation Environmental We are subject to international, federal, state and local environmental laws and regulations. our consolidated financial statements, we record best estimates, using all information that is currently available facts, existing technology, and presently enacted laws and stakeholder and business considerations. experience in remediation of contaminated sites, the U.S. EPA or other organizations. liabilities, and we accrue them in the period they are Although liability of those potentially responsible several for federal sites and frequently so for other particular site. any site at which we have been designated as a in sharing cleanup costs with other financially responsible are still under investigation by the EPA or the agency concerned. potentially responsible normally assess the appropriate remediation. Where it appears that other potentially responsible share, we consider this inability in estimating As a result of various acquisitions in the past, environmental obligations are mitigated by indemnifications indemnifications are subject to dollar limits We are currently participating in environmental assessments and cleanups at numerous comparable state and international sites. other costs, we make accruals on an undiscounted combination, which we record on a discounted basis) sites where it is probable future costs will be incurred not reduced these accruals for possible insurance recoveries. At September 30, 2020, our balance sheet included 177 with $ 171 incur a substantial amount of these expenditures 30 years . additional environmental assessments, cleanups Legal Proceedings We are subject to various lawsuits and claims including but not limited to matters and severance tax payments, gas measurement and damages, climate change, personal injury, and property damage. relate to alleged royalty and tax underpayments claims of alleged environmental contamination vigorously in these matters. Our legal organization applies its knowledge, experience characteristics of our cases, employing a litigation proceedings against us. individual cases. mediation. available information about current developments adequacy of current accruals and determines if accruals, is required. Other Contingencies We have contingent liabilities resulting from throughput agreements with pipeline and not associated with financing arrangements. company with additional funds through advances utilized. $ 240 supplies, commercial activities and services incident In 2007, ConocoPhillips was unable to reach agreement by the Venezuelan government’s Nationalization Decree. Petróleos de Venezuela, S.A. (PDVSA), or its affiliates, directly assumed control over ConocoPhillips’ interests in the Petrozuata and Hamaca heavy oil response to this expropriation, ConocoPhillips ICSID. ConocoPhillips’ significant oil investments decision that the expropriation was unlawful. government of Venezuela to pay ConocoPhillips approximately $ 8.7 government’s unlawful expropriation of the company’s investments in Venezuela in 2007. filed a request for recognition of the award in several issued a decision rectifying the award and reducing 227 at $ 8.5 automatically stayed enforcement of the award. In 2014, ConocoPhillips filed a separate and independent PDVSA under the contracts that had established the an award in April 2018, finding that PDVSA owed ConocoPhillips 2 agreements in connection with the expropriation of the In August 2018, ConocoPhillips entered into a settlement with PDVSA to recover the full amount of this ICC award, plus interest through the payment period, including initial payments totaling approximately $500 million within a period of 90 days from the time of signing of the settlement agreement. The balance of the settlement is to be paid quarterly over a period of four and a half years. received approximately $ 754 various jurisdictions, and ConocoPhillips agreed notices of default to PDVSA on October 14 and November breach. the settlement and any actions taken in enforcement including those related to any applicable sanctions In 2016, ConocoPhillips filed a separate and independent PDVSA under the contracts that had established the awarded ConocoPhillips approximately $ 33 ConocoPhillips is seeking recognition and enforcement has ensured that all the actions related to the award including those related to any applicable sanctions The Office of Natural Resources Revenue (ONRR) has conducted royalties on federal lands and has issued multiple ConocoPhillips has appealed these orders and strongly with the Interior Board of Land Appeals (IBLA), ConocoPhillips filed in 2016 in New Mexico federal Beginning in 2017, cities, counties, governments lawsuits against oil and gas companies, including equitable relief to abate alleged climate change impacts. expected to be filed. involved in these cases are unprecedented. meritless and are an inappropriate vehicle to address vigorously defend against such lawsuits. Several Louisiana parishes and the State of Louisiana 43 Coastal Resources Management Act (SLCRMA) seeking compensatory damages for contamination historical oil and gas operations. 22 vigorously defend against them. about these claims (both as to scope and damages) In 2016, ConocoPhillips, through its subsidiary, The Louisiana Land and Exploration submitted claims as the largest private wetlands owner in Louisiana administration process related to the oil spill administrator issued an award to the company which, 90 million, In October 2020, the Bureau of Safety and Environmental Outer Continental Shelf (OCS) Lease P-0166, including including two offshore platforms located near Carpinteria, owner of OCS Lease P-0166 relinquished the lease Petroleum Company, a legacy company of ConocoPhillips, held a 25 these facilities, but sold its interest approximately 30 years the operation or production on this lease since that

Derivative and Financial Instru

Derivative and Financial Instruments	9 Months Ended
	Sep. 30, 2020
Derivative and Financial Instruments [Abstract]
Derivative and Financial Instruments	Note 13—Derivative and Financial Instruments We use futures, forwards, swaps and options in various markets to meet our customer needs, opportunities and manage foreign exchange currency Commodity Derivative Instruments Our commodity business primarily consists Commodity derivative instruments are held at fair balances have the right of setoff, they are presented on a operating activities on our consolidated statement realized and unrealized gains and losses are recognized business or a net basis if held for trading. with the NPNS exception are recognized upon settlement. contracts. The following table presents the gross fair values line items where they appear on our consolidated Millions of Dollars September 30 December 31 2020 2019 Assets Prepaid expenses and other current assets $ 273 288 Other assets 28 34 Liabilities Other accruals 258 283 Other liabilities and deferred credits 19 28 The gains (losses) from commodity derivatives consolidated income statement were: Millions of Dollars Nine Months Ended September 30 September 30 2020 2019 2020 2019 Sales and other operating revenues $ 33 4 30 68 Other income (loss) (2) 3 3 4 Purchased commodities (27) (9) (29) (60) The table below summarizes our material net exposures contracts: Open Position Long/(Short) September 30 December 31 2020 2019 Commodity Natural gas and power (billions of cubic feet equivalent) (9) (5) (50) (23) Foreign Currency Exchange Derivatives We have foreign currency exchange rate risk resulting from international operations. exchange derivative activity primarily exposures, such as firm commitments for returns from net investments in foreign affiliates, and investments Our foreign currency exchange derivative instruments Related cash flows are recorded as operating activities elect hedge accounting on our foreign currency exchange The following table presents the gross fair values collateral, and the line items where they appear Millions of Dollars September 30 December 31 2020 2019 Assets Prepaid expenses and other current assets $ 16 1 Liabilities Other accruals - 20 Other liabilities and deferred credits - 8 The (gains) losses from foreign currency exchange on our consolidated income statement were: Millions of Dollars Nine Months Ended September 30 September 30 2020 2019 2020 2019 Foreign currency transaction (gain) loss $ 7 (24) (55) (3) We had the following net notional position of outstanding foreign currency exchange In Millions Notional Currency September 30 December 31 2020 2019 Foreign Currency Exchange Derivatives Buy GBP, GBP 3 4 Sell CAD, buy USD CAD 416 1,337 In the second quarter of 2019, we entered into foreign currency exchange contracts to sell CAD 1.35 billion at CAD 0.748 against the USD. In the first quarter of 2020, we entered into forward currency exchange contracts to buy CAD 0.9 billion at CAD 0.718 against the USD Financial Instruments We invest in financial instruments with maturities based on our cash forecasts for currency pools we manage. ● Time deposits: Interest bearing deposits placed with financial of time. ● Demand deposits: Interest bearing deposits placed withdrawn without notice. ● Commercial paper: Unsecured promissory notes issued government agency purchased at a discount to ● U.S. government or government agency obligations: government agencies. ● Foreign government obligations: Securities ● Corporate bonds: Unsecured debt securities ● Asset-backed securities: Collateralized debt securities. The following investments are carried on our Millions of Dollars Carrying Amount Cash and Cash Equivalents Short-Term Investments September 30 December 31 September 30 December 31 2020 2019 2020 2019 Cash $ 545 759 Demand Deposits 1,182 1,483 Time Deposits Remaining maturities from 1 to 90 days 755 2,030 2,961 1,395 Remaining maturities from 91 to 180 days - - 741 465 Remaining maturities within one year - - 7 - Commercial Paper Remaining maturities from 1 to 90 days - 413 50 1,069 U.S. Government Obligations Remaining maturities from 1 to 90 days 5 394 - - $ 2,487 5,079 3,759 2,929 The following investments in debt securities balance sheet at fair value: Millions of Dollars Carrying Amount Cash and Cash Equivalents Short-Term Investments Investments and Long-Term Receivables September 30 2020 December 31 2019 September 30 2020 December 31 2019 September 30 2020 December 31 2019 Corporate Bonds Maturities within one year $ - 1 157 59 - - Maturities greater than one year - - - - 128 99 Commercial Paper Maturities within one year 3 8 108 30 - - U.S. Government Obligations Maturities within one year - - 8 10 - - Maturities greater than one year - - - - 13 15 U.S. Government Agency Obligations Maturities greater than one year - - - - 17 - Foreign Government Obligations Maturities greater than one year - - - - 2 - Asset-backed Securities Maturities greater than one year - - - - 46 19 $ 3 9 273 99 206 133 The following table summarizes the amortized classified as available for sale: Millions of Dollars September 30, 2020 December 31, 2019 Amortized Cost Basis Fair Value Amortized Cost Basis Fair Value Major Security Type Corporate bonds $ 283 285 159 159 Commercial paper 111 111 38 38 U.S. government obligations 21 21 25 25 U.S. government agency obligations 17 17 - - Foreign government obligations 2 2 - - Asset-backed securities 46 46 19 19 $ 480 482 241 241 As of September 30, 2020 and December 31, 2019, available for sale with net losses were negligible. 2019, investments losses has not been recorded were negligible. For the three- investments in debt securities classified as available 109 298 Gross realized gains and losses included in earnings cost of securities sold and redeemed is determined Credit Risk Financial instruments potentially exposed to concentrations short-term investments, long-term investments receivables. government money market funds, government debt financial institutions, and high-quality corporate bonds. placed in high-quality corporate bonds, U.S. government government obligations, and asset-backed securities. The credit risk from our OTC derivative contracts, counterparty to the transaction. limits and includes the use of cash-call margins when appropriate, nonperformance. these trades are cleared with an exchange clearinghouse settled; however, we are exposed to the credit risk of those exchange margin cash calls, as well as for cash deposited to meet Our trade receivables result primarily international customer base, which limits our receivables have payment terms of 30 days creditworthiness of the counterparties. counterparties. credit, prepayments and surety bonds, as well as counterparties that both buy from and sell to to others to be offset against amounts due to us. Certain of our derivative instruments contain provisions that require us to post collateral if the derivative exposure exceeds a threshold amount. We have contracts with fixed threshold amounts and other contracts with variable threshold amounts that are contingent on our credit rating. The variable threshold amounts typically decline for lower credit ratings, while both the variable and fixed threshold amounts typically revert to zero if we fall below investment grade. Cash is the primary collateral in all contracts; however, many also permit us to post letters of credit as collateral, such as transactions administered through the New York Mercantile Exchange. The aggregate fair value of all derivative in a liability position on September 30, 2020 and December 20 79 respectively. no If our credit rating had been downgraded below required to post $ 16

Fair Value Measurement

Fair Value Measurement	9 Months Ended
	Sep. 30, 2020
Fair Value Measurement [Abstract]
Fair Value Measurement	Note 14—Fair Value Measurement We carry a portion of our assets and liabilities at fair value measured at the reporting (i.e., the price that would be received to sell an asset the quality of valuation inputs under the following ● Level 1: Quoted prices (unadjusted) in an active ● Level 2: Inputs other than quoted prices that ● Level 3: Unobservable inputs that are significant The classification hierarchy of an asset or liability value. derived from unobservable inputs is inconsequential becomes available. corroborated market data is no longer available. 2020 or 2019. Recurring Fair Value Measurement Financial assets and liabilities reported at fair Cenovus Energy common shares, our investments in debt commodity derivatives. ● Level 1 derivative assets and liabilities primarily valued using unadjusted prices available from the investment in common shares of Cenovus Energy, which is valued using quotes for shares and our investments in U.S. government obligations are valued using exchange prices. ● Level 2 derivative assets and liabilities primarily sale contracts that are valued using adjusted exchange companies that are all corroborated by market data. securities classified as available for sale including asset-backed securities, U.S. government agency valued using pricing provided by brokers or pricing data. ● Level 3 derivative assets and liabilities consist contracts where a significant portion of fair readily available. relationships among various commodities, modeled relevant economic measures. Level 3 activity was not material for all periods The following table summarizes the fair value unadjusted where the right of setoff exists for commodity basis): Millions of Dollars September 30, 2020 December 31, 2019 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets Investment in Cenovus Energy $ 809 - - 809 2,111 - - 2,111 Investments in debt securities 21 461 - 482 25 216 - 241 Commodity derivatives 173 117 11 301 172 114 36 322 Total assets $ 1,003 578 11 1,592 2,308 330 36 2,674 Liabilities Commodity derivatives $ 173 89 15 277 174 115 22 311 Total liabilities $ 173 89 15 277 174 115 22 311 The following table summarizes those commodity presented on our consolidated balance sheet. multiple derivative instruments executed with the right of setoff exists. Millions of Dollars Amounts Subject to Right of Setoff Gross Amounts Not Gross Net Amounts Subject to Gross Amounts Amounts Cash Net Recognized Right of Setoff Amounts Offset Presented Collateral Amounts September 30, 2020 Assets $ 301 1 300 204 96 5 91 Liabilities 277 - 277 204 73 7 66 December 31, 2019 Assets $ 322 3 319 193 126 4 122 Liabilities 311 4 307 193 114 12 102 At September 30, 2020 and December 31, 2019, balance sheet where we had the right of setoff. Non-Recurring Fair Value Measurement The following table summarizes the fair value assets accounted for at fair value on a non-recurring Millions of Dollars Fair Value Measurement Using Fair Value Level 3 Inputs Before-Tax Loss Net PP&E (held for use) March 31, 2020 $ 77 77 510 During the first quarter of 2020 , the estimated fair value of our assets in the Wind River Basin operations declined to an amount below the carrying value. developed natural gas properties in the Madden Lower 48 segment. The carrying value was written down to fair value. The fair value was estimated based on an internal discounted cash flow model using estimates of future production, an outlook of future prices using a combination of exchanges (short-term) and external pricing services companies (long-term), future operating costs and capital expenditures, and a discount rate believed to be consistent with those used by principal market participants. fair value measurement were as follows: Fair Value (Millions of Dollars) Valuation Technique Unobservable Inputs Range (Arithmetic Average) March 31, 2020 Wind River Basin $ 77 Discounted cash flow Natural gas production (MMCFD) 8.4 55.2 22.9 ) Natural gas price outlook* ($/MMBTU) $ 2.67 9.17 5.68 ) Discount rate** 7.9 % 9.1 % ( 8.3 %) 2.2 % annually after year 2034. **Determined as the weighted average cost of capital of a group Reported Fair Values of Financial Instruments We used the following methods and assumptions to estimate the fair value of financial ● Cash and cash equivalents and short-term investments: sheet approximates fair value. the carrying amount reported on the balance sheet ● Accounts and notes receivable (including long-term reported on the balance sheet approximates fair estimate the fair value of the current portion and advances—related parties. ● Investment in Cenovus Energy: See Note 6—Investment in carrying value and fair value of our investment in ● Investments in debt securities classified as available securities categorized as Level 1 in the fair fair value of investments in debt securities measured using pricing provided by brokers or pricing market data. ● Loans and advances—related parties: The carrying value. categorized as Level 2 in the fair value hierarchy. Receivables, for additional information. ● Accounts payable (including related parties) payable and floating-rate debt reported on the balance ● Fixed-rate debt: The estimated fair value of fixed-rate pricing service that is corroborated by market data; 2 in the fair value hierarchy. ● Commercial paper: The carrying amount of our and is reported on the balance sheet as short-term The following table summarizes the net fair setoff exists for commodity derivatives): Millions of Dollars Carrying Amount Fair Value September 30 December 31 September 30 December 31 2020 2019 2020 2019 Financial assets Investment in Cenovus Energy $ 809 2,111 809 2,111 Commodity derivatives 92 125 92 125 Investments in debt securities 482 241 482 241 Total loans and advances—related parties 219 339 219 339 Financial liabilities Total debt, excluding finance leases 14,482 14,175 18,827 18,108 Commodity derivatives 66 106 66 106

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	9 Months Ended
	Sep. 30, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Loss	Note 15—Accumulated Other Comprehensive Loss Accumulated other comprehensive loss in the Millions of Dollars Defined Benefit Plans Net Unrealized Gain on Securities Foreign Currency Translation Accumulated Other Comprehensive Loss December 31, 2019 $ (350) - (5,007) (5,357) Other comprehensive income (loss) (13) 2 (298) (309) September 30, 2020 $ (363) 2 (5,305) (5,666) The following table summarizes reclassifications income (loss): Millions of Dollars Three Months Ended Nine Months Ended September 30 September 30 2020 2019 2020 2019 Defined benefit plans $ 30 36 46 66 The above amounts are included in the computation of net periodic benefit cost and are presented net of tax expense of $ 7 12 million for the three-month periods ended September 30, 2020 and September 30, 2019, respectively, and $ 11 22 nine-month periods ended September 30, 2020 and September 30, 2019, information.

Cash Flow Information

Cash Flow Information	9 Months Ended
	Sep. 30, 2020
Cash Flow Information [Abstract]
Cash Flow Information	Note 16—Cash Flow Information Millions of Dollars Nine Months Ended September 30 2020 2019 Cash Payments Interest $ 591 614 Income taxes 803 2,210 Net Sales (Purchases) of Investments Short-term investments purchased $ (9,662) (1,894) Short-term investments sold 8,776 1,229 Long-term investments purchased (271) - Long-term investments sold 68 - $ (1,089) (665)

Employee Benefit Plans

Employee Benefit Plans	9 Months Ended
	Sep. 30, 2020
Employee Benefit Plans [Abstract]
Employee Benefit Plans	Note 17—Employee Benefit Plans Pension and Postretirement Plans Millions of Dollars Pension Benefits Other Benefits 2020 2019 2020 2019 U.S. Int'l. U.S. Int'l. Components of Net Periodic Benefit Cost Three Months Ended September 30 Service cost $ 21 14 20 19 1 1 Interest cost 17 21 21 25 2 1 Expected return on plan assets (21) (37) (18) (34) - - Amortization of prior service credit - (1) - - (7) (7) Recognized net actuarial loss (gain) 12 5 13 7 1 (1) Settlements 27 - 37 - - - Curtailments - - - (1) - - Net periodic benefit cost $ 56 2 73 16 (3) (6) Nine Months Ended September 30 Service cost $ 63 41 59 56 2 1 Interest cost 51 63 63 77 5 6 Expected return on plan assets (63) (108) (54) (104) - - Amortization of prior service credit - (1) - (1) (23) (24) Recognized net actuarial loss (gain) 37 16 39 23 1 (2) Settlements 28 (1) 54 - - - Curtailments - - - (1) - - Net periodic benefit cost $ 116 10 161 50 (15) (19) The components of net periodic benefit cost, other expenses” line item on our consolidated income statement. During the first nine months of 2020, we contributed 87 57 to our international benefit plans. 135 our domestic qualified and nonqualified pension 65 international qualified and nonqualified pension During the three-month period ended September service and interest costs for the year for the U.S. proportionate share of prior actuarial losses from of $ 27 the pension plan assets were updated and the pension September 30, 2020. 78 corresponding decrease to other comprehensive loss. rate and reduced long-term lump sum rate assumptions the expected return.

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2020
Related Party Transactions [Abstract]
Related Party Transactions	Note 18—Related Party Transactions Our related parties primarily include equity method employees. Significant transactions with our equity affiliates were: Millions of Dollars Three Months Ended Nine Months Ended September 30 September 30 2020 2019 2020 2019 Operating revenues and other income $ 21 23 59 70 Purchases - - - 38 Operating expenses and selling, general and administrative expenses 16 19 43 47 Net interest income* (1) (3) (5) (10) *We paid interest to, or received interest information on loans to affiliated companies.

Sales and Other Operating Reven

Sales and Other Operating Revenues	9 Months Ended
	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Text Block]	Note 19—Sales and Other Operating Revenues Revenue from Contracts with Customers The following table provides further disaggregation Millions of Dollars Nine Months Ended September 30 September 30 2020 2019 2020 2019 Revenue from contracts with customers $ 3,078 6,240 9,908 19,932 Revenue from contracts outside the scope of ASC Topic 606 Physical contracts meeting the definition of a derivative 1,280 1,529 3,432 4,981 Financial derivative contracts 28 (13) (47) (54) Consolidated sales and other operating revenues $ 4,386 7,756 13,293 24,859 Revenues from contracts outside the scope of ASC market prices which qualify as derivatives accounted and for which we have not elected NPNS. for recognition of revenue from these contracts disaggregation of revenues is provided in conjunction Information: Millions of Dollars Nine Months Ended September 30 September 30 2020 2019 2020 2019 Revenue from Outside the Scope of ASC Topic 606 by Segment Lower 48 $ 1,018 1,099 2,692 3,823 Canada 152 86 452 427 Europe, Middle East and North Africa 110 344 288 731 Physical contracts meeting the definition of a derivative $ 1,280 1,529 3,432 4,981 Millions of Dollars Nine Months Ended September 30 September 30 2020 2019 2020 2019 Revenue from Outside the Scope of ASC Topic 606 by Product Crude oil $ 100 266 218 619 Natural gas 1,042 1,159 2,895 4,022 Other 138 104 319 340 Physical contracts meeting the definition of a derivative $ 1,280 1,529 3,432 4,981 Practical Expedients Typically, cases may extend longer, which may be out to the end of field We have long-term commodity sales contracts which use prevailing market prices at the time of delivery, and under these contracts, the market- based variable consideration for each performance obligation (i.e., delivery of commodity) is allocated to each wholly unsatisfied performance obligation within the contract. we have applied the practical expedient allowed in ASC Topic 606 and do not disclose the aggregate amount of the transaction price allocated to performance obligations or when we expect to recognize revenues that are unsatisfied (or partially unsatisfied) as of the end of the reporting period. Receivables and Contract Liabilities Receivables from Contracts with Customers At September 30, 2020, the “Accounts and notes trade receivables of $ 1,338 2,372 contracts with customers within the scope of ASC Topic 606. We typically receive payment within 30 days or less (depending on the terms of the invoice) once delivery is made. contracts at market prices for which we do not under ASC Topic 815. receivables associated with gas sold under contracts receivables where NPNS has been elected. Contract Liabilities from Contracts with Customers We have entered into contractual arrangements where we license proprietary technology to the optimization process for operating LNG payments to be made at stated milestones. The payments are not directly related to our performance under the contract and are recorded as deferred revenue to be recognized as revenue when the customer can utilize and benefit from their right to use the license. Payments are received in installments over the construction period. Millions of Dollars Contract Liabilities At December 31, 2019 $ 80 Contractual payments received 8 At September 30, 2020 $ 88 Amounts Recognized in the Consolidated Balance Current liabilities $ 47 Noncurrent liabilities 41 $ 88 We expect to recognize the contract liabilities as of September 30, 2020, as revenue during 2021 and 2022. There were no

Segment Disclosures and Related

Segment Disclosures and Related Information	9 Months Ended
	Sep. 30, 2020
Segment Disclosures and Related Information [Abstract]
Segment Disclosures and Related Information	Note 20—Segment Disclosures and Related Information We explore for, produce, transport and market crude oil, bitumen, natural gas, LNG and NGLs on a basis. six region: Alaska; Lower 48; Canada; Europe, International. Corporate and Other represents income and costs most interest expense, corporate overhead and Corporate assets include all cash and cash equivalents We evaluate performance and allocate resources based on net income (loss) attributable Intersegment sales are at prices that approximate Analysis of Results by Operating Segment Millions of Dollars Three Months Ended Nine Months Ended September 30 September 30 2020 2019 2020 2019 Sales and Other Operating Revenues Alaska $ 864 1,296 2,396 4,129 Intersegment eliminations (30) - (11) - Alaska 834 1,296 2,385 4,129 Lower 48 2,323 3,728 6,859 11,690 Intersegment eliminations (9) (10) (47) (33) Lower 48 2,314 3,718 6,812 11,657 Canada 348 633 1,026 2,173 Intersegment eliminations (20) (273) (200) (858) Canada 328 360 826 1,315 Europe, Middle East and North Africa 432 1,225 1,320 4,084 Asia Pacific 477 1,085 1,930 3,458 Other International 1 - 5 - Corporate and Other - 72 15 216 Consolidated sales and other operating revenues $ 4,386 7,756 13,293 24,859 Sales and Other Operating Revenues by Geographic (1) United States $ 3,148 5,085 9,209 15,996 Australia - 412 605 1,282 Canada 328 360 826 1,315 China 161 191 374 593 Indonesia 167 223 503 654 Libya 6 288 50 809 Malaysia 148 258 447 928 Norway 358 632 1,046 1,781 United Kingdom 68 305 224 1,494 Other foreign countries 2 2 9 7 Worldwide consolidated $ 4,386 7,756 13,293 24,859 Sales and Other Operating Revenues by Product Crude oil $ 2,321 4,612 6,981 14,006 Natural gas 1,509 1,799 4,354 6,717 Natural gas liquids 129 156 364 607 Other (2) 427 1,189 1,594 3,529 Consolidated sales and other operating revenues by $ 4,386 7,756 13,293 24,859 (1) Sales and other operating revenues are attributable to countries based on the location of the selling operation. (2) Includes LNG and bitumen. Millions of Dollars Three Months Ended Nine Months Ended September 30 September 30 2020 2019 2020 2019 Net Income (Loss) Attributable to ConocoPhillips Alaska $ (16) 306 (76) 1,152 Lower 48 (78) 26 (880) 425 Canada (75) 51 (270) 273 Europe, Middle East and North Africa 92 2,171 318 3,050 Asia Pacific 25 443 945 1,220 Other International (8) 73 14 285 Corporate and Other (390) (14) (1,980) 64 Consolidated net income (loss) attributable $ (450) 3,056 (1,929) 6,469 Millions of Dollars September 30 December 31 2020 2019 Total Assets Alaska $ 15,910 15,453 Lower 48 12,196 14,425 Canada 6,581 6,350 Europe, Middle East and North Africa 8,420 9,269 Asia Pacific 11,359 13,568 Other International 300 285 Corporate and Other 8,391 11,164 Consolidated total assets $ 63,157 70,514

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2020
Income Taxes [Abstract]
Income Taxes	Note 21—Income Taxes Our effective tax rate was 12 periods were primarily impacted by shifts as well as the change in our U.S. valuation allowance Energy common shares. recognition of certain tax incentives in Malaysia. Our effective tax rates for the nine-month periods ended 8 21 percent, noted above. disposition recognized for our Australia-West assets of $ 587 10 million, the de-recognition of $ 92 this divestiture, and a $ 48 period ended September 30, 2019 was impacted 262 million related to the recognition of a U.S. capital As a result of the COVID-19 pandemic and the operate, including Australia, Canada, Norway and the second quarter, Norway enacted legislation to accelerate immediate monetization of tax losses. our net deferred tax liability of $ 120 $ 124 During the three- $ 33 264 relates primarily to the fair value measurement of our the tax impact related to incremental capital

Announced Acquisition of Concho

Announced Acquisition of Concho Resources Inc	9 Months Ended
	Sep. 30, 2020
Announced Acquisition of Concho Resources Inc. [Abstract]
Announced Acquisition of Concho Resources Inc.	Note 22—Announced Acquisition of Concho On October 19, 2020 , we announced a definitive agreement (the Concho Resources Inc. 9.7 October 16, 2020. directors of each company, each share of Concho common stock will 1.46 shares of ConocoPhillips common stock. approximately $ 3.9 The transaction is anticipated to close in the first ConocoPhillips and Concho shareholders, Merger Agreement is terminated under certain circumstances, $ 450 recommendation in respect of the stockholder to reimburse Concho for its expenses in an amount 142.5 terminated because of a failure of our stockholders Factors” for further discussion of risks related

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2020
Policy Text Block [Abstract]
Basis of Accounting, Policy [Policy Text Block]	The interim-period financial information unaudited and, in the opinion of management, presentation of the consolidated financial flows for such periods. Certain notes and other information have been included in this report. consolidated financial statements and notes included The unrealized (gain) loss on investment in Cenovus flows, previously reflected on the line item reclassified in the comparative period to conform
Revenue Recognition, Policy [Policy Text Block]	Typically, cases may extend longer, which may be out to the end of field We have long-term commodity sales contracts which use prevailing market prices at the time of delivery, and under these contracts, the market- based variable consideration for each performance obligation (i.e., delivery of commodity) is allocated to each wholly unsatisfied performance obligation within the contract. we have applied the practical expedient allowed in ASC Topic 606 and do not disclose the aggregate amount of the transaction price allocated to performance obligations or when we expect to recognize revenues that are unsatisfied (or partially unsatisfied) as of the end of the reporting period.
Long-Duration Contracts Revenue Recognition, Policy [Policy Text Block]	We have entered into contractual arrangements where we license proprietary technology to the optimization process for operating LNG payments to be made at stated milestones. The payments are not directly related to our performance under the contract and are recorded as deferred revenue to be recognized as revenue when the customer can utilize and benefit from their right to use the license. Payments are received in installments over the construction period.

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 30, 2020
Inventories [Abstract]
Inventories	Note 3—Inventories Inventories consisted of the following: Millions of Dollars September 30 2020 2019 Crude oil and natural gas $ 503 472 Materials and supplies 531 554 $ 1,034 1,026

Impairments (Tables)

Impairments (Tables)	9 Months Ended
	Sep. 30, 2020
Impairments [Abstract]
Before-tax impairment charges [Table Text Block]	Note 8—Impairments During the three- impairment charges within the following segments: Millions of Dollars Nine Months Ended September 30 September 30 2020 2019 2020 2019 Lower 48 $ 1 22 514 22 Europe, Middle East and North Africa 1 2 7 4 $ 2 24 521 26

Changes in Equity (Tables)

Changes in Equity (Tables)	9 Months Ended
	Sep. 30, 2020
Stockholders' Equity Note [Abstract]
Schedule of Stockholders Equity [Table Text Block]	Note 10—Changes in Equity Millions of Dollars Attributable to ConocoPhillips Common Stock Par Value Capital in Excess of Par Treasury Stock Accum. Other Comprehensive Income (Loss) Retained Earnings Non- Controlling Interests Total For the three months ended September 30, 2020 Balances at June 30, 2020 $ 18 47,079 (47,130) (5,825) 37,351 31,493 Net loss (450) (450) Other comprehensive income 159 159 Dividends paid ($ 0.42 (454) (454) Distributed under benefit plans 34 34 Other 1 1 Balances at September 30, 2020 $ 18 47,113 (47,130) (5,666) 36,448 30,783 For the nine months ended September 30, Balances at December 31, 2019 $ 18 46,983 (46,405) (5,357) 39,742 69 35,050 Net income (loss) (1,929) 46 (1,883) Other comprehensive loss (309) (309) Dividends paid ($ 1.26 (1,367) (1,367) Repurchase of company common stock (726) (726) Distributions to noncontrolling interests and other (32) (32) Disposition (84) (84) Distributed under benefit plans 130 130 Other 1 2 1 4 Balances at September 30, 2020 $ 18 47,113 (47,130) (5,666) 36,448 - 30,783 Millions of Dollars Attributable to ConocoPhillips Common Stock Par Value Capital in Excess of Par Treasury Stock Accum. Other Comprehensive Income (Loss) Retained Earnings Non- Controlling Interests Total For the three months ended September 30, 2019 Balances at June 30, 2019 $ 18 46,922 (44,906) (5,827) 36,769 98 33,074 Net income 3,056 15 3,071 Other comprehensive income 173 173 Dividends paid ($ 0.31 (341) (341) Repurchase of company common stock (749) (749) Distributions to noncontrolling interests and other (20) (20) Distributed under benefit plans 32 32 Other (1) (1) Balances at September 30, 2019 $ 18 46,954 (45,656) (5,654) 39,484 93 35,239 For the nine months ended September 30, Balances at December 31, 2018 $ 18 46,879 (42,905) (6,063) 34,010 125 32,064 Net income 6,469 45 6,514 Other comprehensive income 449 449 Dividends paid ($ 0.92 (1,037) (1,037) Repurchase of company common stock (2,751) (2,751) Distributions to noncontrolling interests and other (80) (80) Distributed under benefit plans 75 75 Changes in Accounting Principles* (40) 40 - Other 2 3 5 Balances at September 30, 2019 $ 18 46,954 (45,656) (5,654) 39,484 93 35,239 *Cumulative effect of the adoption of ASU No. 2018-02,

Derivative and Financial Inst_2

Derivative and Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2020
Derivative and Financial Instruments [Abstract]
Balance sheet location and fair value amounts of derivatives	The following table presents the gross fair values line items where they appear on our consolidated Millions of Dollars September 30 December 31 2020 2019 Assets Prepaid expenses and other current assets $ 273 288 Other assets 28 34 Liabilities Other accruals 258 283 Other liabilities and deferred credits 19 28 The following table presents the gross fair values collateral, and the line items where they appear Millions of Dollars September 30 December 31 2020 2019 Assets Prepaid expenses and other current assets $ 16 1 Liabilities Other accruals - 20 Other liabilities and deferred credits - 8
Income statement location and gain/loss amounts of derivatives	The gains (losses) from commodity derivatives consolidated income statement were: Millions of Dollars Nine Months Ended September 30 September 30 2020 2019 2020 2019 Sales and other operating revenues $ 33 4 30 68 Other income (loss) (2) 3 3 4 Purchased commodities (27) (9) (29) (60) The (gains) losses from foreign currency exchange on our consolidated income statement were: Millions of Dollars Nine Months Ended September 30 September 30 2020 2019 2020 2019 Foreign currency transaction (gain) loss $ 7 (24) (55) (3)
Net exposures from outstanding commodity derivative contracts	The table below summarizes our material net exposures contracts: Open Position Long/(Short) September 30 December 31 2020 2019 Commodity Natural gas and power (billions of cubic feet equivalent) (9) (5) (50) (23) We had the following net notional position of outstanding foreign currency exchange In Millions Notional Currency September 30 December 31 2020 2019 Foreign Currency Exchange Derivatives Buy GBP, GBP 3 4 Sell CAD, buy USD CAD 416 1,337
Net carrying amount of held to maturity investments	The following investments are carried on our Millions of Dollars Carrying Amount Cash and Cash Equivalents Short-Term Investments September 30 December 31 September 30 December 31 2020 2019 2020 2019 Cash $ 545 759 Demand Deposits 1,182 1,483 Time Deposits Remaining maturities from 1 to 90 days 755 2,030 2,961 1,395 Remaining maturities from 91 to 180 days - - 741 465 Remaining maturities within one year - - 7 - Commercial Paper Remaining maturities from 1 to 90 days - 413 50 1,069 U.S. Government Obligations Remaining maturities from 1 to 90 days 5 394 - - $ 2,487 5,079 3,759 2,929
Debt Securities Carried at Fair Value	The following investments in debt securities balance sheet at fair value: Millions of Dollars Carrying Amount Cash and Cash Equivalents Short-Term Investments Investments and Long-Term Receivables September 30 2020 December 31 2019 September 30 2020 December 31 2019 September 30 2020 December 31 2019 Corporate Bonds Maturities within one year $ - 1 157 59 - - Maturities greater than one year - - - - 128 99 Commercial Paper Maturities within one year 3 8 108 30 - - U.S. Government Obligations Maturities within one year - - 8 10 - - Maturities greater than one year - - - - 13 15 U.S. Government Agency Obligations Maturities greater than one year - - - - 17 - Foreign Government Obligations Maturities greater than one year - - - - 2 - Asset-backed Securities Maturities greater than one year - - - - 46 19 $ 3 9 273 99 206 133
Amortized cost basis and fair value of investments in debt securities classified as available for sale	The following table summarizes the amortized classified as available for sale: Millions of Dollars September 30, 2020 December 31, 2019 Amortized Cost Basis Fair Value Amortized Cost Basis Fair Value Major Security Type Corporate bonds $ 283 285 159 159 Commercial paper 111 111 38 38 U.S. government obligations 21 21 25 25 U.S. government agency obligations 17 17 - - Foreign government obligations 2 2 - - Asset-backed securities 46 46 19 19 $ 480 482 241 241

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	9 Months Ended
	Sep. 30, 2020
Fair Value Measurement [Abstract]
Fair value hierarchy for gross financial assets and liabilities	Millions of Dollars September 30, 2020 December 31, 2019 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets Investment in Cenovus Energy $ 809 - - 809 2,111 - - 2,111 Investments in debt securities 21 461 - 482 25 216 - 241 Commodity derivatives 173 117 11 301 172 114 36 322 Total assets $ 1,003 578 11 1,592 2,308 330 36 2,674 Liabilities Commodity derivatives $ 173 89 15 277 174 115 22 311 Total liabilities $ 173 89 15 277 174 115 22 311
Commodity derivative balances subject to right of setoff	The following table summarizes those commodity presented on our consolidated balance sheet. multiple derivative instruments executed with the right of setoff exists. Millions of Dollars Amounts Subject to Right of Setoff Gross Amounts Not Gross Net Amounts Subject to Gross Amounts Amounts Cash Net Recognized Right of Setoff Amounts Offset Presented Collateral Amounts September 30, 2020 Assets $ 301 1 300 204 96 5 91 Liabilities 277 - 277 204 73 7 66 December 31, 2019 Assets $ 322 3 319 193 126 4 122 Liabilities 311 4 307 193 114 12 102 At September 30, 2020 and December 31, 2019, balance sheet where we had the right of setoff.
Values of assets, by major category, measured at fair value on a nonrecurring basis	Non-Recurring Fair Value Measurement The following table summarizes the fair value assets accounted for at fair value on a non-recurring Millions of Dollars Fair Value Measurement Using Fair Value Level 3 Inputs Before-Tax Loss Net PP&E (held for use) March 31, 2020 $ 77 77 510
Range and arithmetic average of significant unobservable inputs - Wind River Basin	Fair Value (Millions of Dollars) Valuation Technique Unobservable Inputs Range (Arithmetic Average) March 31, 2020 Wind River Basin $ 77 Discounted cash flow Natural gas production (MMCFD) 8.4 55.2 22.9 ) Natural gas price outlook* ($/MMBTU) $ 2.67 9.17 5.68 ) Discount rate** 7.9 % 9.1 % ( 8.3 %) 2.2 % annually after year 2034. **Determined as the weighted average cost of capital of a group
Net fair value of financial instruments	The following table summarizes the net fair setoff exists for commodity derivatives): Millions of Dollars Carrying Amount Fair Value September 30 December 31 September 30 December 31 2020 2019 2020 2019 Financial assets Investment in Cenovus Energy $ 809 2,111 809 2,111 Commodity derivatives 92 125 92 125 Investments in debt securities 482 241 482 241 Total loans and advances—related parties 219 339 219 339 Financial liabilities Total debt, excluding finance leases 14,482 14,175 18,827 18,108 Commodity derivatives 66 106 66 106

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	9 Months Ended
	Sep. 30, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Components of accumulated other comprehensive loss in the equity section of the balance sheet	Note 15—Accumulated Other Comprehensive Loss Accumulated other comprehensive loss in the Millions of Dollars Defined Benefit Plans Net Unrealized Gain on Securities Foreign Currency Translation Accumulated Other Comprehensive Loss December 31, 2019 $ (350) - (5,007) (5,357) Other comprehensive income (loss) (13) 2 (298) (309) September 30, 2020 $ (363) 2 (5,305) (5,666)
Items reclassified out of accumulated other comprehensive income (loss)	The following table summarizes reclassifications income (loss): Millions of Dollars Three Months Ended Nine Months Ended September 30 September 30 2020 2019 2020 2019 Defined benefit plans $ 30 36 46 66 The above amounts are included in the computation of net periodic benefit cost and are presented net of tax expense of $ 7 12 million for the three-month periods ended September 30, 2020 and September 30, 2019, respectively, and $ 11 22 nine-month periods ended September 30, 2020 and September 30, 2019, information.

Cash Flow Information (Tables)

Cash Flow Information (Tables)	9 Months Ended
	Sep. 30, 2020
Cash Flow Information [Abstract]
Cash Flow Information	Note 16—Cash Flow Information Millions of Dollars Nine Months Ended September 30 2020 2019 Cash Payments Interest $ 591 614 Income taxes 803 2,210 Net Sales (Purchases) of Investments Short-term investments purchased $ (9,662) (1,894) Short-term investments sold 8,776 1,229 Long-term investments purchased (271) - Long-term investments sold 68 - $ (1,089) (665)

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2020
Employee Benefit Plans [Abstract]
Pension and Postretirement Plans	Note 17—Employee Benefit Plans Pension and Postretirement Plans Millions of Dollars Pension Benefits Other Benefits 2020 2019 2020 2019 U.S. Int'l. U.S. Int'l. Components of Net Periodic Benefit Cost Three Months Ended September 30 Service cost $ 21 14 20 19 1 1 Interest cost 17 21 21 25 2 1 Expected return on plan assets (21) (37) (18) (34) - - Amortization of prior service credit - (1) - - (7) (7) Recognized net actuarial loss (gain) 12 5 13 7 1 (1) Settlements 27 - 37 - - - Curtailments - - - (1) - - Net periodic benefit cost $ 56 2 73 16 (3) (6) Nine Months Ended September 30 Service cost $ 63 41 59 56 2 1 Interest cost 51 63 63 77 5 6 Expected return on plan assets (63) (108) (54) (104) - - Amortization of prior service credit - (1) - (1) (23) (24) Recognized net actuarial loss (gain) 37 16 39 23 1 (2) Settlements 28 (1) 54 - - - Curtailments - - - (1) - - Net periodic benefit cost $ 116 10 161 50 (15) (19)

Related Party Transactions (Tab

Related Party Transactions (Tables)	9 Months Ended
	Sep. 30, 2020
Related Party Transactions [Abstract]
Significant transactions with related parties	Note 18—Related Party Transactions Our related parties primarily include equity method employees. Significant transactions with our equity affiliates were: Millions of Dollars Three Months Ended Nine Months Ended September 30 September 30 2020 2019 2020 2019 Operating revenues and other income $ 21 23 59 70 Purchases - - - 38 Operating expenses and selling, general and administrative expenses 16 19 43 47 Net interest income* (1) (3) (5) (10) *We paid interest to, or received interest information on loans to affiliated companies.

Sales and Other Operating Rev_2

Sales and Other Operating Revenue (Tables)	9 Months Ended
	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue [Table Text Block]	Millions of Dollars Nine Months Ended September 30 September 30 2020 2019 2020 2019 Revenue from contracts with customers $ 3,078 6,240 9,908 19,932 Revenue from contracts outside the scope of ASC Topic 606 Physical contracts meeting the definition of a derivative 1,280 1,529 3,432 4,981 Financial derivative contracts 28 (13) (47) (54) Consolidated sales and other operating revenues $ 4,386 7,756 13,293 24,859 Millions of Dollars Nine Months Ended September 30 September 30 2020 2019 2020 2019 Revenue from Outside the Scope of ASC Topic 606 by Segment Lower 48 $ 1,018 1,099 2,692 3,823 Canada 152 86 452 427 Europe, Middle East and North Africa 110 344 288 731 Physical contracts meeting the definition of a derivative $ 1,280 1,529 3,432 4,981 Millions of Dollars Nine Months Ended September 30 September 30 2020 2019 2020 2019 Revenue from Outside the Scope of ASC Topic 606 by Product Crude oil $ 100 266 218 619 Natural gas 1,042 1,159 2,895 4,022 Other 138 104 319 340 Physical contracts meeting the definition of a derivative $ 1,280 1,529 3,432 4,981
Contract with Customer, Asset and Liability [Table Text Block]	Millions of Dollars Contract Liabilities At December 31, 2019 $ 80 Contractual payments received 8 At September 30, 2020 $ 88 Amounts Recognized in the Consolidated Balance Current liabilities $ 47 Noncurrent liabilities 41 $ 88

Segment Disclosures and Relat_2

Segment Disclosures and Related Information (Tables)	9 Months Ended
	Sep. 30, 2020
Segment Disclosures and Related Information [Abstract]
Analysis of Results by Operating Segment	Analysis of Results by Operating Segment Millions of Dollars Three Months Ended Nine Months Ended September 30 September 30 2020 2019 2020 2019 Sales and Other Operating Revenues Alaska $ 864 1,296 2,396 4,129 Intersegment eliminations (30) - (11) - Alaska 834 1,296 2,385 4,129 Lower 48 2,323 3,728 6,859 11,690 Intersegment eliminations (9) (10) (47) (33) Lower 48 2,314 3,718 6,812 11,657 Canada 348 633 1,026 2,173 Intersegment eliminations (20) (273) (200) (858) Canada 328 360 826 1,315 Europe, Middle East and North Africa 432 1,225 1,320 4,084 Asia Pacific 477 1,085 1,930 3,458 Other International 1 - 5 - Corporate and Other - 72 15 216 Consolidated sales and other operating revenues $ 4,386 7,756 13,293 24,859 Sales and Other Operating Revenues by Geographic (1) United States $ 3,148 5,085 9,209 15,996 Australia - 412 605 1,282 Canada 328 360 826 1,315 China 161 191 374 593 Indonesia 167 223 503 654 Libya 6 288 50 809 Malaysia 148 258 447 928 Norway 358 632 1,046 1,781 United Kingdom 68 305 224 1,494 Other foreign countries 2 2 9 7 Worldwide consolidated $ 4,386 7,756 13,293 24,859 Sales and Other Operating Revenues by Product Crude oil $ 2,321 4,612 6,981 14,006 Natural gas 1,509 1,799 4,354 6,717 Natural gas liquids 129 156 364 607 Other (2) 427 1,189 1,594 3,529 Consolidated sales and other operating revenues by $ 4,386 7,756 13,293 24,859 (1) Sales and other operating revenues are attributable to countries based on the location of the selling operation. (2) Includes LNG and bitumen. Millions of Dollars Three Months Ended Nine Months Ended September 30 September 30 2020 2019 2020 2019 Net Income (Loss) Attributable to ConocoPhillips Alaska $ (16) 306 (76) 1,152 Lower 48 (78) 26 (880) 425 Canada (75) 51 (270) 273 Europe, Middle East and North Africa 92 2,171 318 3,050 Asia Pacific 25 443 945 1,220 Other International (8) 73 14 285 Corporate and Other (390) (14) (1,980) 64 Consolidated net income (loss) attributable $ (450) 3,056 (1,929) 6,469 Millions of Dollars September 30 December 31 2020 2019 Total Assets Alaska $ 15,910 15,453 Lower 48 12,196 14,425 Canada 6,581 6,350 Europe, Middle East and North Africa 8,420 9,269 Asia Pacific 11,359 13,568 Other International 300 285 Corporate and Other 8,391 11,164 Consolidated total assets $ 63,157 70,514

Consolidated Statement of Cas_3

Consolidated Statement of Cash Flows - Restricted Cash (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Prepaid Expenses and Other Current Assets [Member]
Restricted Cash	$ 91	$ 90
Other Assets [Member]
Restricted Cash	$ 215	$ 184

Change in Accounting Principl_2

Change in Accounting Principles (Details) - Accounting Standards Update 2016-13 [Member]	9 Months Ended
	Sep. 30, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounting Standards Update [Extensible List]	Accounting Standards Update 2016-13 [Member]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Jan. 1, 2020
Change in Accounting Principle, Accounting Standards Update, Early Adoption [true false]	false
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]	true

Inventories (Details)

Inventories (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Inventories [Abstract]
Crude oil and natural gas	$ 503	$ 472
Materials and supplies	531	554
Total Inventories	$ 1,034	$ 1,026

Inventories Textual (Details)

Inventories Textual (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Inventories [Abstract]
Lower of cost or market adjustment for crude oil and natural gas inventories	$ 228
LIFO Inventory Amount		$ 373	$ 286

Asset Acquisitions and Dispos_2

Asset Acquisitions and Dispositions - Asset Acquisition - Textual (Details) $ in Millions	1 Months Ended
	Aug. 31, 2020USD ($)a	Sep. 30, 2020USD ($)	Dec. 31, 2019USD ($)
Asset Acquisition
Asset retirement obligations and accrued environmental costs		$ 5,651	$ 5,352
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt		$ 3,900
Canada Segment [Member] | Operating Segments [Member] | Montney [Member]
Asset Acquisition
Oil and Gas, Undeveloped Acreage, Net | a	295,000
Noncontrolling Interest, Ownership Percentage by Parent	100.00%
Additional Montney acreage [Member] | Canada Segment [Member] | Operating Segments [Member]
Asset Acquisition
Payments to Acquire Businesses, Gross	$ 382
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Liabilities	$ 31
Oil and Gas, Undeveloped Acreage, Net | a	140,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	$ 490
Asset retirement obligations and accrued environmental costs	77
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt	$ 31

Asset Acquisitions and Dispos_3

Asset Acquisitions and Dispositions - Assets Sold - Textual (Details) - Operating Segments [Member]	1 Months Ended			5 Months Ended	9 Months Ended		12 Months Ended
	May 31, 2020USD ($)	Mar. 31, 2020USD ($)	Feb. 29, 2020USD ($)	May 27, 2020USD ($)MBoe	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Dec. 31, 2019MBoe
Australia West Assets [Member] | Asia Pacific [Member]
Assets Sold
Proceeds from asset dispositions	$ 765,000,000
Before-tax gain (loss) on disposition					$ (587,000,000)
Disposition, Net carrying value				$ 200,000,000
Disposition, Cash				500,000,000
Disposition, PP&E				1,300,000,000
Disposition, Other current assets				100,000,000
Asset Retirement Obligation of held for sale or sold				700,000,000
Disposition, deferred tax liabilities				300,000,000
Disposition, other liabilities				$ 200,000,000
Disposition, Before-tax earnings					$ (851,000,000)	$ (222,000,000)
Segment which includes disposition					Asia Pacific
Barossa project [Member] | Asia Pacific [Member]
Assets Sold
Production | MBoe				43
Barossa project [Member] | Asia Pacific [Member] | Scenario Plan [Member]
Assets Sold
Proceeds from asset dispositions	$ 200,000,000
Waddell Ranch [Member] | Lower 48 Segment
Assets Sold
Proceeds from asset dispositions			$ 184,000,000
Before-tax gain (loss) on disposition			$ 0
Production | MBoe							15
Segment which includes disposition					Lower 48
Niobrara [Member] | Lower 48 Segment
Assets Sold
Proceeds from asset dispositions		$ 359,000,000
Before-tax gain (loss) on disposition		38,000,000
Disposition, Net carrying value		397,000,000
Disposition, PP&E		433,000,000
Asset Retirement Obligation of held for sale or sold		$ 34,000,000
Disposition, Before-tax earnings					$ 22,000,000	$ 7,000,000
Production | MBoe							15
Segment which includes disposition					Lower 48

Investments, Loans and Long-T_2

Investments, Loans and Long-Term Receivables - Textual (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Mar. 31, 2019	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2012
Equity method investments
Loan balance with affiliated company			$ 219	$ 339
APLNG [Member]
Equity method investments
Project finance facility, maximum borrowing capacity					$ 8,500
Line Of Credit Facility Value Outstanding			6,200
Book value of equity method investment			$ 6,877
Long Term Debt Refinanced Amount		$ 3,200
Line of Credit Facility, Expiration Date			Mar. 31, 2029
Line of Credit Facility, Frequency of Payments			bi-annual
APLNG [Member] | Export-Import Bank of the US [Member]
Equity method investments
Project finance facility, maximum borrowing capacity					2,900
APLNG [Member] | Export-Import Bank of China [Member]
Equity method investments
Project finance facility, maximum borrowing capacity					2,700
Early Repayment of Senior Debt	$ 1,400	1,000
Line of Credit Facility, Expiration Date			Sep. 30, 2030
Line of Credit Facility, Frequency of Payments			bi-annual
APLNG [Member] | Australian and International Commercial Bank Syndicate [Member]
Equity method investments
Project finance facility, maximum borrowing capacity					$ 2,900
Early Repayment of Senior Debt		2,200
APLNG [Member] | U S Private Placement Bond [Member]
Equity method investments
Project finance facility, maximum borrowing capacity	$ 1,400	600
Line of Credit Facility, Expiration Date			Sep. 30, 2030
Line of Credit Facility, Frequency of Payments			bi-annual
APLNG [Member] | Commerical Banks [Member]
Equity method investments
Project finance facility, maximum borrowing capacity		$ 2,600
Line of Credit Facility, Expiration Date			Mar. 31, 2028
Line of Credit Facility, Frequency of Payments			bi-annual
QG3 [Member]
Equity method investments
Loan balance with affiliated company			$ 219

Investment in Cenovus Energy -

Investment in Cenovus Energy - Textual (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	May 17, 2017
Schedule Of Available For Sale Securities [Line Items]
Investment in Cenovus Energy	$ 809		$ 809		$ 2,111
Unrealized (gain) loss on investment in Cenovus Energy			$ 1,302	$ (489)
Foster Creek Christina Lake (FCCL) [Member]
Schedule Of Available For Sale Securities [Line Items]
Equity Method Investment, Ownership Percentage						50.00%
Cenovus Energy Common Stock [Member]
Schedule Of Available For Sale Securities [Line Items]
Shares Exchange for Assets Held for Sale	208		208			208
Investment Owned, Common Stock, percent of Issued and Outstanding						16.90%
Investment in Cenovus Energy	$ 809		$ 809		$ 2,110	$ 1,960
Unrealized (gain) loss on investment in Cenovus Energy	$ 162	$ (116)	$ 1,300	$ (489)
Cenovus Energy Common Stock [Member] | Cenovus Energy Inc [Member]
Schedule Of Available For Sale Securities [Line Items]
Cenovus Energy common share price	$ 3.89		$ 3.89			$ 9.41

Suspended Wells - Textual (Deta

Suspended Wells - Textual (Details) $ in Millions	9 Months Ended
	Sep. 30, 2020USD ($)
Suspended Wells [Abstract]
Capitalized cost of suspended wells	$ 711
Increase (decrease) in capitalized cost of suspended wells	309
Capitalized Exploratory Well Cost, Charged to Dry Hole Expense	$ 20
Number of wells charged to dry hole expense	one

Impairments (Details)

Impairments (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Impairments	$ 2		$ 24	$ 521	$ 26
Lower 48 [Member]
Segment Reporting Information [Line Items]
Impairments	1	$ 511	22	514	22
Europe, Middle East and North Africa [Member]
Segment Reporting Information [Line Items]
Impairments	$ 1		$ 2	$ 7	$ 4

Impairments - Textual (Details)

Impairments - Textual (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Impairments	$ 2		$ 24	$ 521	$ 26
Before-tax impairment related to the associated carrying value of capitalized undeveloped leasehold costs	125		360	410	592
Lower 48 [Member]
Segment Reporting Information [Line Items]
Impairments	$ 1	$ 511	22	$ 514	$ 22
Before-tax impairment related to the associated carrying value of capitalized undeveloped leasehold costs			$ 141
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Before-tax impairment related to the associated carrying value of capitalized undeveloped leasehold costs		$ 31

Debt - Textual (Details)

Debt - Textual (Details) - USD ($)	1 Months Ended	3 Months Ended	9 Months Ended
	Oct. 31, 2020	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Debt [Abstract]
Debt balance		$ 15,387,000,000	$ 15,387,000,000		$ 14,895,000,000
Short Term Debt [Line Items]
Proceeds from Issuance of Commercial Paper		300,000,000	300,000,000	$ 0
Commercial Paper Program, Amount Outstanding		240,000,000	$ 240,000,000
Moody's, A3 Rating [Member]
Debt Instrument [Line Items]
Debt Instrument, Credit Rating			and Moody’s affirmed its rating of “A3” with a “stable” outlook.
Fitch, A Rating [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Debt Instrument, Credit Rating	Fitch affirmed its rating of “A” with a “stable” outlook
Standard & Poor's, A Rating [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Debt Instrument, Credit Rating	In October 2020, S&P affirmed its “A” rating on our senior long-term debt and revised its outlook to “stable” from “negative,”
Revolving Credit Facility [Member]
Short Term Debt [Line Items]
Maximum borrowing capactiy under revolving credit facility		6,000,000,000	$ 6,000,000,000
Line of Credit Facility, Expiration Date			May 31, 2023
Remaining borrowing capacity under revolving credit facility		5,700,000,000	$ 5,700,000,000
Commercial Paper Program, Amount Outstanding		0	0		0
Letter of Credit [Member]
Short Term Debt [Line Items]
Commercial Paper Program, Amount Outstanding		0	0		0
Letter of Credit [Member] | Maximum [Member]
Short Term Debt [Line Items]
Commercial Paper Program, Capacity		500,000,000	500,000,000
VRDB [Member]
Debt Instrument [Line Items]
Debt Instrument Face Amount		283,000,000	283,000,000
Conoco Phillips Commercial Paper Program [Member] | Commercial Paper [Member]
Short Term Debt [Line Items]
Maximum borrowing capactiy under revolving credit facility		6,000,000,000	6,000,000,000
Commercial Paper Program, Amount Outstanding		$ 300,000,000	$ 300,000,000		$ 0
Conoco Phillips Commercial Paper Program [Member] | Commercial Paper [Member] | Maximum [Member]
Short Term Debt [Line Items]
Maturity period of commercial paper (in days)			P90D

Changes in Equity (Details)

Changes in Equity (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance		$ 31,493	$ 33,074	$ 35,050	$ 32,064
Net income (loss)		(450)	3,071	(1,883)	6,514
Other Comprehensive Income (Loss)		159	173	(309)	449
Dividends paid		(454)	(341)	(1,367)	(1,037)
Repurchase of company common stock			(749)	(726)	(2,751)
Distributions to noncontrolling interests and other			(20)	(32)	(80)
Disposition				(84)
Distributed under benefit plans		34	32	130	75
Other		1	(1)	4	5
Ending Balance		30,783	35,239	30,783	35,239
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2018-02 [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Ending Balance	[1]		0		0
Par Value - Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance		18	18	18	18
Ending Balance		18	18	18	18
Capital in excess of par [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance		47,079	46,922	46,983	46,879
Distributed under benefit plans		34	32	130	75
Ending Balance		47,113	46,954	47,113	46,954
Treasury Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance		(47,130)	(44,906)	(46,405)	(42,905)
Repurchase of company common stock			(749)	(726)	(2,751)
Other			(1)	1
Ending Balance		(47,130)	(45,656)	(47,130)	(45,656)
Accum Other Comprehensive Income (Loss) [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance		(5,825)	(5,827)	(5,357)	(6,063)
Other Comprehensive Income (Loss)		159	173	(309)	449
Ending Balance		(5,666)	(5,654)	(5,666)	(5,654)
Accum Other Comprehensive Income (Loss) [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2018-02 [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Ending Balance	[1]		(40)		(40)
Retained Earnings [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance		37,351	36,769	39,742	34,010
Net income (loss)		(450)	3,056	(1,929)	6,469
Dividends paid		(454)	(341)	(1,367)	(1,037)
Other		1		2	2
Ending Balance		36,448	39,484	36,448	39,484
Retained Earnings [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2018-02 [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Ending Balance	[1]		40		40
Noncontrolling Interests [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance			98	69	125
Net income (loss)			15	46	45
Distributions to noncontrolling interests and other			(20)	(32)	(80)
Disposition				(84)
Other				1	3
Ending Balance		$ 0	$ 93	$ 0	$ 93
[1]	*Cumulative effect of the adoption of ASU No. 2018-02,

Changes in Equity - Parenthetic

Changes in Equity - Parenthetical (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Stockholders' Equity Note [Abstract]
Common Stock, Dividends, Per Share, Cash Paid	$ 0.42	$ 0.31	$ 1.26	$ 0.92

Guarantees - Textual (Details)

Guarantees - Textual (Details) $ in Millions	9 Months Ended
	Sep. 30, 2020USD ($)
Australia Pacific APLNG [Member]
Guarantor Obligations [Line Items]
Ownership percentage in equity investment	37.50%
Finance Reserve Guarantee [Member] | Australia Pacific APLNG [Member]
Guarantor Obligations [Line Items]
Terms of Guarantees Outstanding	10 years
Maximum potential amount of future payments	$ 170
Guarantor Obligations, Current Carrying Value	$ 14
Guarantee existing sales agreement of natural gas delivery | Australia Pacific APLNG [Member] | Maximum [Member]
Guarantor Obligations [Line Items]
Terms of Guarantees Outstanding	1 to 22 years
Max potential future payments-reckless breach [Member] | Australia Pacific APLNG [Member]
Guarantor Obligations [Line Items]
Maximum potential amount of future payments	$ 1,300
Max potential future payments-prorata share [Member] | Australia Pacific APLNG [Member]
Guarantor Obligations [Line Items]
Maximum potential amount of future payments	720
Continued development [Member] | Australia Pacific APLNG [Member]
Guarantor Obligations [Line Items]
Maximum potential amount of future payments	120
Guarantor Obligations, Current Carrying Value	$ 7
Continued development [Member] | Australia Pacific APLNG [Member] | Maximum [Member]
Guarantor Obligations [Line Items]
Terms of Guarantees Outstanding	16 to 25 years or the life of the venture
Other Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential amount of future payments	$ 750
Guarantor Obligations, Current Carrying Value	$ 11
Other Guarantees [Member] | Maximum [Member]
Guarantor Obligations [Line Items]
Terms of Guarantees Outstanding	1 to 5 years
Indemnifications [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	$ 50

Contingencies and Commitments -

Contingencies and Commitments - Textual (Details) $ in Millions	Aug. 02, 2019USD ($)	Jul. 31, 2020USD ($)	Mar. 31, 2019USD ($)	Aug. 31, 2018USD ($)	Apr. 30, 2018USD ($)	Sep. 30, 2020USD ($)	Dec. 31, 2017Lawsuits	Jun. 30, 2020USD ($)	Dec. 31, 2019USD ($)	Aug. 29, 2019USD ($)
Loss Contingencies [Line Items]
Total environmental accrual included in balance sheet						$ 177			$ 171
Letters of Credit Outstanding, Amount						$ 240
Phillips Petroleum Company [Member] | Outer Continental Shelf Lease [Member]
Loss Contingencies [Line Items]
Ownership percentage in equity investment						25.00%
Sale of interest, duration						30 years
The Louisiana Land and Exploration Company LLC [Member]
Loss Contingencies [Line Items]
Litigation Settlement, Amount Awarded from Other Party		$ 90
Several Louisiana parishes and the State of Louisiana against oil and gas companies [Member]
Loss Contingencies [Line Items]
Loss Contingency, New Claims Filed, Number | Lawsuits							43
Several Louisiana parishes and the State of Louisiana against oil and gas companies [Member] | ConocoPhillips Entities [Member]
Loss Contingencies [Line Items]
Loss Contingency, New Claims Filed, Number | Lawsuits							22
US and Canada [Member] | Cleanup Remediation Activities [Member]
Loss Contingencies [Line Items]
Loss Contingency, Settlement Agreement, Terms						P30Y
Venezuela | ConocoPhillips Versus Petroleos de Venezuela ICISD [Member]
Loss Contingencies [Line Items]
Litigation Settlement, Amount Awarded from Other Party			$ 8,700
Litigation Award Reduction										$ 227
Litigation Settlement Amount Awarded From Other Party Revised										$ 8,500
Venezuela | ConocoPhillips vs Petroleos De Venezuela ICC [Member]
Loss Contingencies [Line Items]
Litigation Settlement, Amount Awarded from Other Party	$ 33			$ 500	$ 2,000
Loss Contingency, Settlement Agreement, Terms						In August 2018, ConocoPhillips entered into a settlement with PDVSA to recover the full amount of this ICC award, plus interest through the payment period, including initial payments totaling approximately $500 million within a period of 90 days from the time of signing of the settlement agreement. The balance of the settlement is to be paid quarterly over a period of four and a half years.
Cash Proceeds from Legal Settlements								$ 754

Derivative and Financial Inst_3

Derivative and Financial Instruments - Commodity Balance Sheet (Details) - Commodity Contract [Member] - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Prepaid expenses and other current assets [Member]
Derivatives, Fair Value [Line Items]
Commodity derivative assets	$ 273	$ 288
Other assets [Member]
Derivatives, Fair Value [Line Items]
Commodity derivative assets	28	34
Other accruals [Member]
Derivatives, Fair Value [Line Items]
Commodity derivative liabilities	258	283
Other liabilities and deferred credits [Member]
Derivatives, Fair Value [Line Items]
Commodity derivative liabilities	$ 19	$ 28

Derivative and Financial Inst_4

Derivative and Financial Instruments - Commodity Gain (Loss) (Details) - Commodity Contract [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Sales and other operating revenues [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) from commodity derivatives	$ 33	$ 4	$ 30	$ 68
Other Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) from commodity derivatives	(2)	3	3	4
Purchased commodities [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) from commodity derivatives	$ (27)	$ (9)	$ (29)	$ (60)

Derivative and Financial Inst_5

Derivative and Financial Instruments - Commodity Notional (Details) - Short [Member] - Commodity Contract [Member] - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Natural gas and power, Fixed price [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Commodity derivatives - volumetric material net exposures	(9)	(5)
Natural gas and power, Basis [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Commodity derivatives - volumetric material net exposures	(50)	(23)

Derivative and Financial Inst_6

Derivative and Financial Instruments - FX Balance Sheet (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Prepaid Expenses and Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Foreign currency exchange derivative assets	$ 16	$ 1
Other Accruals [Member]
Derivatives, Fair Value [Line Items]
Foreign currency exchange derivative liabilities	0	20
Other liabilities and deferred credits [Member]
Derivatives, Fair Value [Line Items]
Foreign currency exchange derivative liabilities	$ 0	$ 8

Derivative and Financial Inst_7

Derivative and Financial Instruments - FX Gain (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Foreign currency transaction gains (losses) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Foreign currency transaction (gains) losses	$ 7	$ (24)	$ (55)	$ (3)

Derivative and Financial Inst_8

Derivative and Financial Instruments - FX Notional (Details) £ in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2020CAD ($)	Sep. 30, 2020GBP (£)	Mar. 31, 2020CAD ($)$ / $	Dec. 31, 2019CAD ($)	Dec. 31, 2019GBP (£)	Jun. 30, 2019CAD ($)$ / $
Notional Disclosures [Abstract]
Description of Foreign Currency Derivative Instruments Not Designated as Hedging Instruments Activities	In the second quarter of 2019, we entered into foreign currency exchange contracts to sell CAD 1.35 billion at CAD 0.748 against the USD. In the first quarter of 2020, we entered into forward currency exchange contracts to buy CAD 0.9 billion at CAD 0.718 against the USD
Buy British Pound Sell Euro [Member]
Notional Disclosures [Abstract]
Net notional position of foreign currency exchange derivatives | £		£ 3			£ 4
Sell Canadian dollar, buy U.S. dollar [Member]
Notional Disclosures [Abstract]
Net notional position of foreign currency exchange derivatives	$ 416			$ 1,337
Sell Canadian dollar, buy U.S. dollar [Member] | Nondesignated [Member]
Notional Disclosures [Abstract]
Net notional position of foreign currency exchange derivatives						$ 1,350
Derivative, Currency Bought	USD
Derivative, Currency Sold	CAD
Derivative, Forward Exchange Rate | $ / $						0.748
Buy CAD, Sell USD [Member] | Nondesignated [Member]
Notional Disclosures [Abstract]
Net notional position of foreign currency exchange derivatives			$ 900
Derivative, Currency Bought	CAD
Derivative, Currency Sold	USD
Derivative, Forward Exchange Rate | $ / $			0.718

Derivative and Financial Inst_9

Derivative and Financial Instruments - Financial Instruments at cost, plus accrued interest (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Schedule of Held-to-maturity Securities [Line Items]
Cash and Cash Equivalents, carried at cost plus accrued interest	$ 2,487	$ 5,079
Short-term investments, carried at cost plust accrued interest	3,759	2,929
Cash [Member]
Schedule of Held-to-maturity Securities [Line Items]
Cash and Cash Equivalents, carried at cost plus accrued interest	545	759
Demand Deposits [Member]
Schedule of Held-to-maturity Securities [Line Items]
Cash and Cash Equivalents, carried at cost plus accrued interest	1,182	1,483
Time Deposits [Member] | Remaining maturities from 1 to 90 days [Member]
Schedule of Held-to-maturity Securities [Line Items]
Cash and Cash Equivalents, carried at cost plus accrued interest	755	2,030
Short-term investments, carried at cost plust accrued interest	2,961	1,395
Time Deposits [Member] | Remaining maturities from 91 to 180 days [Member]
Schedule of Held-to-maturity Securities [Line Items]
Cash and Cash Equivalents, carried at cost plus accrued interest	0	0
Short-term investments, carried at cost plust accrued interest	741	465
Time Deposits [Member] | Remaining maturities within one year [Member]
Schedule of Held-to-maturity Securities [Line Items]
Cash and Cash Equivalents, carried at cost plus accrued interest	0	0
Short-term investments, carried at cost plust accrued interest	7	0
Commercial Paper [Member] | Remaining maturities from 1 to 90 days [Member]
Schedule of Held-to-maturity Securities [Line Items]
Cash and Cash Equivalents, carried at cost plus accrued interest	0	413
Short-term investments, carried at cost plust accrued interest	50	1,069
Government obligations [Member] | Remaining maturities from 1 to 90 days [Member]
Schedule of Held-to-maturity Securities [Line Items]
Cash and Cash Equivalents, carried at cost plus accrued interest	5	394
Short-term investments, carried at cost plust accrued interest	$ 0	$ 0

Derivative and Financial Ins_10

Derivative and Financial Instruments - Financial Instruments at fair value (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Schedule Of Available For Sale Securities [Line Items]
Cash and cash equivalents	$ 2,490	$ 5,088
Short-term Investments	4,032	3,028
Investments and long-term receiavables	8,295	8,687
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Schedule Of Available For Sale Securities [Line Items]
Cash and cash equivalents	3	9
Short-term Investments	273	99
Investments and long-term receiavables	206	133
Corporate Bonds [Member] | Remaining maturities within one year [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Schedule Of Available For Sale Securities [Line Items]
Cash and cash equivalents	0	1
Short-term Investments	157	59
Investments and long-term receiavables	0	0
Corporate Bonds [Member] | Remaining Maturities Greater Than One Year Through Five Years [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Schedule Of Available For Sale Securities [Line Items]
Cash and cash equivalents	0	0
Short-term Investments	0	0
Investments and long-term receiavables	128	99
Commercial Paper [Member] | Remaining maturities within one year [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Schedule Of Available For Sale Securities [Line Items]
Cash and cash equivalents	3	8
Short-term Investments	108	30
Investments and long-term receiavables	0	0
Government obligations [Member] | Remaining maturities within one year [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Schedule Of Available For Sale Securities [Line Items]
Cash and cash equivalents	0	0
Short-term Investments	8	10
Investments and long-term receiavables	0	0
Government obligations [Member] | Remaining Maturities Greater Than One Year Through Five Years [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Schedule Of Available For Sale Securities [Line Items]
Cash and cash equivalents	0	0
Short-term Investments	0	0
Investments and long-term receiavables	13	15
U.S. Government Agency Obligations [Member] | Remaining Maturities Greater Than One Year Through Five Years [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Schedule Of Available For Sale Securities [Line Items]
Cash and cash equivalents	0	0
Short-term Investments	0	0
Investments and long-term receiavables	17	0
Foreign government obligations [Member] | Remaining Maturities Greater Than One Year Through Five Years [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Schedule Of Available For Sale Securities [Line Items]
Cash and cash equivalents	0	0
Short-term Investments	0	0
Investments and long-term receiavables	2	0
Asset-backed Securities [Member] | Remaining Maturities Greater Than One Year Through Five Years [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Schedule Of Available For Sale Securities [Line Items]
Cash and cash equivalents	0	0
Short-term Investments	0	0
Investments and long-term receiavables	$ 46	$ 19

Derivative and Financial Ins_11

Derivative and Financial Instruments - Cost Basis to Fair Value (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Dec. 31, 2019
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost Basis	$ 480	$ 480	$ 241
Fair Value	482	482	241
Proceeds from sales and redemptions of investments in debt securities classified as available for sale	109	298
Corporate Bonds [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost Basis	283	283	159
Fair Value	285	285	159
Commercial Paper [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost Basis	111	111	38
Fair Value	111	111	38
Government obligations [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost Basis	21	21	25
Fair Value	21	21	25
U.S. Government Agency Obligations [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost Basis	17	17	0
Fair Value	17	17	0
Foreign government obligations [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost Basis	2	2	0
Fair Value	2	2	0
Asset-backed Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost Basis	46	46	19
Fair Value	$ 46	$ 46	$ 19

Derivative and Financial Ins_12

Derivative and Financial Instruments - Credit Risk (Details Textual) - USD ($)	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Aggregate fair value of all derivative instruments in a liability position	$ 20,000,000	$ 79,000,000
Collateral was posted for derivative instruments in a liability position	0
In event of downgrade below investment grade [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Additional collateral, either in the form of cash or letters of credit	$ 16,000,000
Financial instruments [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Credit Derivative, Recourse Provisions	Certain of our derivative instruments contain provisions that require us to post collateral if the derivative exposure exceeds a threshold amount. We have contracts with fixed threshold amounts and other contracts with variable threshold amounts that are contingent on our credit rating. The variable threshold amounts typically decline for lower credit ratings, while both the variable and fixed threshold amounts typically revert to zero if we fall below investment grade. Cash is the primary collateral in all contracts; however, many also permit us to post letters of credit as collateral, such as transactions administered through the New York Mercantile Exchange.
Trade receivables [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Terms of financial instruments and trade receivables	30 days

Fair Value Measurement - FV Hie

Fair Value Measurement - FV Hierarchy (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in Cenovus Energy	$ 809	$ 2,111
Investments in debt securities	482	241
Commodity derivative asset, gross	301	322
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in Cenovus Energy	809	2,111
Investments in debt securities	482	241
Commodity derivative asset, gross	301	322
Total assets	1,592	2,674
Commodity derivative liability, gross	277	311
Total liabilities	277	311
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in Cenovus Energy	809	2,111
Investments in debt securities	21	25
Commodity derivative asset, gross	173	172
Total assets	1,003	2,308
Commodity derivative liability, gross	173	174
Total liabilities	173	174
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in Cenovus Energy	0	0
Investments in debt securities	461	216
Commodity derivative asset, gross	117	114
Total assets	578	330
Commodity derivative liability, gross	89	115
Total liabilities	89	115
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in Cenovus Energy	0	0
Investments in debt securities	0	0
Commodity derivative asset, gross	11	36
Total assets	11	36
Commodity derivative liability, gross	15	22
Total liabilities	$ 15	$ 22

Fair Value Measurement - FV of

Fair Value Measurement - FV of Commodity Derivatives (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Offsetting Derivative Assets [Abstract]
Assets - gross amounts recognized	$ 301	$ 322
Assets - amounts without right of setoff	1	3
Assets - gross amounts	300	319
Assets - gross amounts offset	204	193
Assets - net amounts presented	96	126
Assets - cash collateral	5	4
Assets - net amounts	91	122
Offsetting Derivative Liabilities [Abstract]
Liabilities - gross amounts recognized	277	311
Liabilities - amounts without right of setoff	0	4
Liabilities - gross amounts recognized	277	307
Liabilities - gross amounts offset	204	193
Liabilities - net amounts presented	73	114
Liabilities - cash collateral	7	12
Liabilities - net amounts	$ 66	$ 102

Fair Value Measurement - Nonrec

Fair Value Measurement - Nonrecurring (Details) - Fair Value Measurements Nonrecurring [Member] $ in Millions	3 Months Ended
	Mar. 31, 2020USD ($)
Fair Value, Disclosure Item Amounts [Domain]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 77
Before-Tax Loss - Cost and Equity method investments	510
Fair Value, Inputs, Level 3 [Member] | Fair Value, Disclosure Item Amounts [Domain]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 77

Fair Value Measurement - Range

Fair Value Measurement - Range and arithmetic average of significant unobservable inputs (Details) - Wind River Basin [Member] - Fair Value, Inputs, Level 3 [Member] - Fair Value Measurements Nonrecurring [Member] - Lower 48 [Member] $ in Millions	Jan. 01, 2035	Mar. 31, 2020USD ($)$ / MMBTUMMcf	Sep. 30, 2020
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements, Nonrecurring, Measurement Period			During the first quarter of 2020
Fair Value Measurements, Valuation Processes, Description			The carrying value was written down to fair value. The fair value was estimated based on an internal discounted cash flow model using estimates of future production, an outlook of future prices using a combination of exchanges (short-term) and external pricing services companies (long-term), future operating costs and capital expenditures, and a discount rate believed to be consistent with those used by principal market participants.
Assets, Fair Value Disclosure | $		$ 77
Valuation Technique, Discounted Cash Flow [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Natural gas production | MMcf		8.4
Valuation Technique, Discounted Cash Flow [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Natural gas production | MMcf		55.2
Valuation Technique, Discounted Cash Flow [Member] | Arithmetic Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Natural gas production | MMcf		22.9
Measurement Input, Commodity Future Price [Member] | Forecast [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Future prices annual increase (decrease), percentage	220.00%
Measurement Input, Commodity Future Price [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Natural gas price outlook | $ / MMBTU		2.67
Measurement Input, Commodity Future Price [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Natural gas price outlook | $ / MMBTU		9.17
Measurement Input, Commodity Future Price [Member] | Arithmetic Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Natural gas price outlook | $ / MMBTU		5.68
Measurement Input, Discount Rate [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount Rate		7.90%
Measurement Input, Discount Rate [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount Rate		9.10%
Measurement Input, Discount Rate [Member] | Arithmetic Average [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount Rate		8.30%

Fair Value Measurement - FV o_2

Fair Value Measurement - FV of Financial Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Carrying Amount [Member]
Financial Assets [Abstract]
Investment in Cenovus Energy	$ 809	$ 2,111
Investments in debt securities	482	241
Total loans and advances - related parties	219	339
Financial Liabilities [Abstract]
Total debt, excluding capital leases	14,482	14,175
Carrying Amount [Member] | Commodity Contract [Member]
Financial Assets [Abstract]
Commodity derivatives, assets	92	125
Financial Liabilities [Abstract]
Commodity derivatives, liability	66	106
Investment in Cenovus Energy	809	2,111
Investments in debt securities	482	241
Total loans and advances - related parties	219	339
Total debt, excluding capital leases	18,827	18,108
Commodity Contract [Member]
Financial Assets [Abstract]
Commodity derivatives, assets	92	125
Financial Liabilities [Abstract]
Commodity derivatives, liability	$ 66	$ 106

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Defined Benefit Plans, Beginning Balance			$ (350)
Defined Benefit Plans	$ 31	$ 72	13	$ 42
Defined Benefit Plans, Ending Balance	(363)		(363)
Net Unrealized Gain on Securities, Beginning Balance			0
Net Unrealized Loss on Securities			2
Net Unrealized Gain on Securities, Ending Balance	2		2
Foreign Currency Translation, Beginning Balance			(5,007)
Foreign Currency Translation	190	245	(298)	491
Foreign Currency Translation, Ending Balance	(5,305)		(5,305)
Accumulated Other Comprehensive Income, Beginning Balance			(5,357)
Other Comprehensive Income (Loss), Net of Tax	159	$ 173	(309)	$ 449
Accumulated Other Comprehensive Income, Ending Balance	$ (5,666)		$ (5,666)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) - Reclassifications (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Defined Benefit Plans	$ 30	$ 36	$ 46	$ 66
Tax expense of defined benefit plans	$ 7	$ 12	$ 11	$ 22

Cash Flow Information (Details)

Cash Flow Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash Payments
Interest	$ 591	$ 614
Income taxes	803	2,210
Net Sales (Purchases) of Investments
Short-term investments purchased	(9,662)	(1,894)
Short-term investments sold	8,776	1,229
Investments and Long-term receivables purchased	(271)	0
Investments and Long-term receivables sold	68	0
Net Sales (Purchases) of Investments	$ (1,089)	$ (665)

Employee Benefit Plans - Compon

Employee Benefit Plans - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Pension Plans Defined Benefit [Member] | U.S.
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	$ 21	$ 20	$ 63	$ 59
Interest cost	17	21	51	63
Expected return on plan assets	(21)	(18)	(63)	(54)
Amortization of prior service cost (credit)	0	0	0	0
Recognized net actuarial (gain) loss	12	13	37	39
Settlements	27	37	28	54
Curtailments	0	0	0	0
Net periodic benefit cost	56	73	116	161
Pension Plans Defined Benefit [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	14	19	41	56
Interest cost	21	25	63	77
Expected return on plan assets	(37)	(34)	(108)	(104)
Amortization of prior service cost (credit)	(1)	0	(1)	(1)
Recognized net actuarial (gain) loss	5	7	16	23
Settlements	0	0	(1)	0
Curtailments	0	(1)	0	(1)
Net periodic benefit cost	2	16	10	50
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	1	1	2	1
Interest cost	2	1	5	6
Expected return on plan assets	0	0	0	0
Amortization of prior service cost (credit)	(7)	(7)	(23)	(24)
Recognized net actuarial (gain) loss	1	(1)	1	(2)
Settlements	0	0	0	0
Curtailments	0	0	0	0
Net periodic benefit cost	$ (3)	$ (6)	$ (15)	$ (19)

Employee Benefit Plans - Textua

Employee Benefit Plans - Textual (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2020USD ($)	Sep. 30, 2020USD ($)
U.S.
Defined Benefit Plan Disclosure [Line Items]
Company contributions		$ 87
Expected company contributions	$ 135	135
U.S. | Qualified Plan [Member] | Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension Expense (Reversal of Expense), Noncash	27
Increase (Decrease) in Obligation, Pension Benefits	78
Int'l (Pension Benefits) [Member]
Defined Benefit Plan Disclosure [Line Items]
Company contributions		57
Expected company contributions	$ 65	$ 65

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Significant transactions with related parties
Related Party Revenue	$ 21	$ 23	$ 59	$ 70
Related Party Purchases	0	0	0	38
Operating expenses and selling, general and administrative expenses	16	19	43	47
Net interest income	$ (1)	$ (3)	$ (5)	$ (10)

Sales and Other Operating Rev_3

Sales and Other Operating Revenue - Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue from contracts with customers	$ 4,386	$ 7,756	$ 13,293	$ 24,859
Revenue, Performance Obligation, Description of Payment Terms			The payments are not directly related to our performance under the contract and are recorded as deferred revenue to be recognized as revenue when the customer can utilize and benefit from their right to use the license.
Customers within the scope of ASC Topic 606 [Member]
Revenue from contracts with customers	3,078	6,240	$ 9,908	19,932
Physical gas contracts [Member]
Revenue from contracts with customers	1,280	1,529	3,432	4,981
Crude oil product line [Member]
Revenue from contracts with customers	100	266	218	619
Natural Gas Product Line [Member]
Revenue from contracts with customers	1,042	1,159	2,895	4,022
Other Products [Member]
Revenue from contracts with customers	138	104	319	340
Financial Derivative Contracts [Member]
Revenue from contracts with customers	28	(13)	(47)	(54)
Lower 48 Segment | Physical gas contracts [Member]
Revenue from contracts with customers	1,018	1,099	2,692	3,823
Canada Segment [Member] | Physical gas contracts [Member]
Revenue from contracts with customers	152	86	452	427
Europe, Middle East and North Africa [Member] | Physical gas contracts [Member]
Revenue from contracts with customers	$ 110	$ 344	$ 288	$ 731

Sales and Other Operating Rev_4

Sales and Other Operating Revenue - Practical Expedients (Details)	9 Months Ended
	Sep. 30, 2020
Revenue, Practical Expedient [Abstract]
Revenue, Practical Expedient, Remaining Performance Obligation, Description	We have long-term commodity sales contracts which use prevailing market prices at the time of delivery, and under these contracts, the market-based variable consideration for each performance obligation (i.e., delivery of commodity) is allocated to each wholly unsatisfied performance obligation within the contract.
Practical Expedient	true
Revenue, Performance Obligation, Description of Timing	We typically receive payment within 30 days or less (depending on the terms of the invoice) once delivery is made.

Sales and Other Operating Rev_5

Sales and Other Operating Revenue - Receivables and Contract Liabilities (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2020	Dec. 31, 2019
Accounts Receivable, Net			$ 1,338,000,000	$ 2,372,000,000
Revenue, Performance Obligation, Description of Timing		We typically receive payment within 30 days or less (depending on the terms of the invoice) once delivery is made.
Contract with Customer, Timing of Satisfaction of Performance Obligation and Payment		Payments are received in installments over the construction period.
Revenue, Performance Obligation, Description of Payment Terms		The payments are not directly related to our performance under the contract and are recorded as deferred revenue to be recognized as revenue when the customer can utilize and benefit from their right to use the license.
Contract Liabilities from Contracts with Customers	$ 88,000,000	$ 88,000,000	88,000,000	$ 80,000,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Explanation		We expect to recognize the contract liabilities as of September 30, 2020, as revenue during 2021 and 2022.
Contract with Customer, Liability, Revenue Recognized	0	$ 0
Contract with Customer, Liability [Abstract]
Contract with Customer, Liability Beginning Balance		80,000,000
Contractual payments received		8,000,000
Contract with Customer, Liability Ending Balance	88,000,000	88,000,000
Short-term Contract with Customer [Member]
Contract Liabilities from Contracts with Customers	47,000,000	47,000,000	47,000,000
Contract with Customer, Liability [Abstract]
Contract with Customer, Liability Ending Balance	47,000,000	47,000,000
Long-term Contract with Customer [Member]
Contract Liabilities from Contracts with Customers	41,000,000	41,000,000	$ 41,000,000
Contract with Customer, Liability [Abstract]
Contract with Customer, Liability Ending Balance	$ 41,000,000	$ 41,000,000

Segment Disclosures - Textual (

Segment Disclosures - Textual (Details)	9 Months Ended
	Sep. 30, 2020
Segment Disclosures and Related Information [Abstract]
Number of Operating Segments	6

Segment Disclosures and Relat_3

Segment Disclosures and Related Information - Sales (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Sales and other operating revenues	$ 4,386	$ 7,756	$ 13,293	$ 24,859
Natural Gas [Member]
Segment Reporting Information [Line Items]
Sales and other operating revenues	1,509	1,799	4,354	6,717
Natural Gas Liquids Reserves [Member]
Segment Reporting Information [Line Items]
Sales and other operating revenues	129	156	364	607
Crude Oil [Member]
Segment Reporting Information [Line Items]
Sales and other operating revenues	2,321	4,612	6,981	14,006
Other Products [Member]
Segment Reporting Information [Line Items]
Sales and other operating revenues	427	1,189	1,594	3,529
U.S.
Segment Reporting Information [Line Items]
Sales and other operating revenues	3,148	5,085	9,209	15,996
Australia
Segment Reporting Information [Line Items]
Sales and other operating revenues	0	412	605	1,282
Canada
Segment Reporting Information [Line Items]
Sales and other operating revenues	328	360	826	1,315
China
Segment Reporting Information [Line Items]
Sales and other operating revenues	161	191	374	593
Indonesia
Segment Reporting Information [Line Items]
Sales and other operating revenues	167	223	503	654
Libya
Segment Reporting Information [Line Items]
Sales and other operating revenues	6	288	50	809
Malaysia
Segment Reporting Information [Line Items]
Sales and other operating revenues	148	258	447	928
Norway
Segment Reporting Information [Line Items]
Sales and other operating revenues	358	632	1,046	1,781
United Kingdom
Segment Reporting Information [Line Items]
Sales and other operating revenues	68	305	224	1,494
Other foreign Countries
Segment Reporting Information [Line Items]
Sales and other operating revenues	2	2	9	7
Operating Segments [Member]
Segment Reporting Information [Line Items]
Sales and other operating revenues	4,386	7,756	13,293	24,859
Alaska [Member]
Segment Reporting Information [Line Items]
Sales and other operating revenues	864	1,296	2,396	4,129
Alaska [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Sales and other operating revenues	834	1,296	2,385	4,129
Alaska [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Sales and other operating revenues	(30)	0	(11)	0
Lower 48 [Member]
Segment Reporting Information [Line Items]
Sales and other operating revenues	2,323	3,728	6,859	11,690
Lower 48 [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Sales and other operating revenues	2,314	3,718	6,812	11,657
Lower 48 [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Sales and other operating revenues	(9)	(10)	(47)	(33)
Canada
Segment Reporting Information [Line Items]
Sales and other operating revenues	348	633	1,026	2,173
Canada | Operating Segments [Member]
Segment Reporting Information [Line Items]
Sales and other operating revenues	328	360	826	1,315
Canada | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Sales and other operating revenues	(20)	(273)	(200)	(858)
Europe, Middle East and North Africa [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Sales and other operating revenues	432	1,225	1,320	4,084
Asia Pacific [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Sales and other operating revenues	477	1,085	1,930	3,458
Other International [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Sales and other operating revenues	1	0	5	0
Corporate and Other [Member] | Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Sales and other operating revenues	$ 0	$ 72	$ 15	$ 216

Segment Disclosures and Relat_4

Segment Disclosures and Related Information - Net Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net Income (Loss) Attributable to ConocoPhillips [Abstract]
Consolidated net income (loss) attributable to ConocoPhillips	$ (450)	$ 3,056	$ (1,929)	$ 6,469
Alaska [Member] | Operating Segments [Member]
Net Income (Loss) Attributable to ConocoPhillips [Abstract]
Consolidated net income (loss) attributable to ConocoPhillips	(16)	306	(76)	1,152
Lower 48 [Member] | Operating Segments [Member]
Net Income (Loss) Attributable to ConocoPhillips [Abstract]
Consolidated net income (loss) attributable to ConocoPhillips	(78)	26	(880)	425
Canada [Member] | Operating Segments [Member]
Net Income (Loss) Attributable to ConocoPhillips [Abstract]
Consolidated net income (loss) attributable to ConocoPhillips	(75)	51	(270)	273
Europe, Middle East and North Africa [Member] | Operating Segments [Member]
Net Income (Loss) Attributable to ConocoPhillips [Abstract]
Consolidated net income (loss) attributable to ConocoPhillips	92	2,171	318	3,050
Asia Pacific [Member] | Operating Segments [Member]
Net Income (Loss) Attributable to ConocoPhillips [Abstract]
Consolidated net income (loss) attributable to ConocoPhillips	25	443	945	1,220
Other International [Member] | Operating Segments [Member]
Net Income (Loss) Attributable to ConocoPhillips [Abstract]
Consolidated net income (loss) attributable to ConocoPhillips	(8)	73	14	285
Corporate and Other [Member] | Corporate, Non-Segment [Member]
Net Income (Loss) Attributable to ConocoPhillips [Abstract]
Consolidated net income (loss) attributable to ConocoPhillips	$ (390)	$ (14)	$ (1,980)	$ 64

Segment Disclosures and Relat_5

Segment Disclosures and Related Information - Assets (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Assets [Abstract]
Total Assets	$ 63,157	$ 70,514
Alaska [Member] | Operating Segments [Member]
Assets [Abstract]
Total Assets	15,910	15,453
Lower 48 [Member] | Operating Segments [Member]
Assets [Abstract]
Total Assets	12,196	14,425
Canada [Member] | Operating Segments [Member]
Assets [Abstract]
Total Assets	6,581	6,350
Europe, Middle East and North Africa [Member] | Operating Segments [Member]
Assets [Abstract]
Total Assets	8,420	9,269
Asia Pacific [Member] | Operating Segments [Member]
Assets [Abstract]
Total Assets	11,359	13,568
Other International [Member] | Operating Segments [Member]
Assets [Abstract]
Total Assets	300	285
Corporate and Other [Member] | Corporate, Non-Segment [Member]
Assets [Abstract]
Total Assets	$ 8,391	$ 11,164

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Examination [Line Items]
Effective tax rate	12.00%		12.00%	8.00%	21.00%
Income (Loss) before income taxes	$ (512)		$ 3,493	$ (2,054)	$ 8,238
Income Tax Expense (Benefit)	62		$ (422)	171	(1,724)
Reversal of deferred tax assets		$ (120)
Refund from the Alberta Tax & Revenue Administration	48			48
Decrease to our accrued income and other taxes liability		$ 124
Adjustment to valuation allowances	$ (33)			(264)
Australia West Assets [Member] | Operating Segments [Member] | Asia Pacific [Member]
Income Tax Examination [Line Items]
Before-tax gain (loss) on disposition				587
Income Tax Expense (Benefit)				10
Reversal of deferred tax assets				$ 92
U.K. Subsidiaries [Member]
Income Tax Examination [Line Items]
Income Tax Expense (Benefit)					$ 262

Announced Acquisition of Conc_2

Announced Acquisition of Concho Resources Inc. (Details) $ in Millions	Oct. 19, 2020USD ($)	Sep. 30, 2020USD ($)
Subsequent Event [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt		$ 3,900
Subsequent Event [Member] | Concho Resources Inc. [Member] | Scenario Plan [Member]
Subsequent Event [Line Items]
Business Acquisition, Date of Acquisition Agreement	Oct. 19, 2020
Business Acquisition, Name of Acquired Entity	Concho Resources Inc.
Payments to Acquire Businesses, Gross	$ 9,700
Subsequent Event [Member] | Concho Resources Inc. [Member] | Scenario Plan [Member] | Merger Agreement Termination [Member]
Subsequent Event [Line Items]
Business Exit Costs	450
Subsequent Event [Member] | Concho Resources Inc. [Member] | Scenario Plan [Member] | Reimbursement Of Acquiree Merger Related Costs [Member]
Subsequent Event [Line Items]
Business Exit Costs	$ 142.5
Subsequent Event [Member] | Concho Resources Inc. [Member] | Scenario Plan [Member] | Common Stock [Member]
Subsequent Event [Line Items]
Stock For Stock Exchange Fixed Ratio	1.46