Halliburton (HAL) 10-K 5 Feb 21 2020 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ / shares in Units, $ in Billions	12 Months Ended
	Dec. 31, 2020	Jan. 29, 2021	Jun. 30, 2020	Dec. 31, 2019
Document And Enity Information [Abstract]
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2020
Entity File Number	001-03492
Entity Registrant Name	HALLIBURTON COMPANY
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	75-2677995
Entity Address, Address Line One	3000 North Sam Houston Parkway East
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77032
City Area Code	281
Local Phone Number	871-2699
Title of 12(b) Security	Common Stock, par value $2.50 per share
Trading Symbol	HAL
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
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 Public Float			$ 10.1
Entity Common Stock, Shares Outstanding		888,632,775
Entity Central Index Key	0000045012
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false
Common Stock, Par or Stated Value Per Share	$ 2.50			$ 2.50
ICFR Auditor Attestation Flag	true

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue:
Revenue		$ 14,445	$ 22,408	$ 23,995
Operating costs and expenses:
Impairments and other charges	[1]	3,799	2,506	265
General and administrative		182	227	254
Total operating costs and expenses		16,881	22,856	21,528
Operating income (loss)		(2,436)	(448)	2,467
Interest expense, net of interest income		(505)	(569)	(554)
Other, net		(111)	(105)	(99)
Income (loss) from continuing operations before income taxes		(3,220)	(1,122)	1,814
Income tax benefit (provision)		278	(7)	(157)
Net income (loss)		(2,942)	(1,129)	1,657
Net (income) loss attributable to noncontrolling interest		(3)	(2)	(1)
Net income (loss) attributable to company		(2,945)	(1,131)	1,656
Amounts attributable to company shareholders:
Net income (loss) attributable to company		$ (2,945)	$ (1,131)	$ 1,656
Basic and diluted income (loss) per share attributable to company shareholders:
Net income (loss) per share (in dollars per share)		$ (3.34)	$ (1.29)	$ 1.89
Basic weighted average common shares outstanding		881	875	875
Diluted weighted average common shares outstanding		881	875	877
Services [Member]
Revenue:
Revenue		$ 10,203	$ 16,884	$ 18,444
Operating costs and expenses:
Cost of services and sales		9,458	15,684	16,591
Product sales [Member]
Revenue:
Revenue		4,242	5,524	5,551
Operating costs and expenses:
Cost of services and sales		$ 3,442	$ 4,439	$ 4,418
[1]	Impairments and other charges are as follows: -For the year ended December 31, 2020, amount includes approximately $2.4 billion attributable to Completion and Production, $1.4 billion attributable to Drilling and Evaluation, and $62 million attributable to Corporate and other. -For the year ended December 31, 2019, amount includes approximately $1.6 billion attributable to Completion and Production, $849 million attributable to Drilling and Evaluation, and $56 million attributable to Corporate and other. -For the years ended December 31, 2018, we recorded aggregate charges of $265 million to write-down our investment in Venezuela.

Consolidated Statements of Op_2

Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Investment Income, Interest	$ 38	$ 23	$ 44

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net income (loss)	$ (2,942)	$ (1,129)	$ 1,657
Other comprehensive income (loss), net of income taxes:
Defined benefit and other postretirement plans adjustments	(24)	(11)	131
Other	24	3	(17)
Other comprehensive income (loss), net of income taxes	0	(8)	114
Comprehensive income (loss)	(2,942)	(1,137)	1,771
Comprehensive income attributable to noncontrolling interest	(3)	(2)	(1)
Comprehensive income (loss) attributable to company shareholders	$ (2,945)	$ (1,139)	$ 1,770

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) shares in Millions, $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Assets, Current [Abstract]
Cash and equivalents	$ 2,563	$ 2,268
Receivables (net of allowances for bad debts)	3,071	4,577
Inventories	2,349	3,139
Other current assets	942	1,048
Total current assets	9,475	11,212
Accounts Receivable, Allowance for Credit Loss, Current	824	776
Accounts Receivable, Allowance for Credit Loss, Current	824	776
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	11,039	12,630
Property, plant and equipment (net of accumulated depreciation)	4,325	7,310
Goodwill	2,804	2,812
Operating lease right-of-use assets	786	931
Other assets	1,124	1,429
Total assets	20,680	25,377
Current liabilities:
Accounts payable	1,573	2,432
Accrued employee compensation and benefits	517	604
Taxes other than income	292	310
Current portion of operating lease liabliities	251	208
Other current liabilities	1,093	1,313
Total current liabilities	4,421	4,878
Long-term debt	9,132	10,316
Operating lease liabilities	758	825
Employee compensation and benefits	562	525
Other liabilities	824	808
Total liabilities	15,697	17,352
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common stock, par value $2.50 per share	2,666	2,669
Paid-in capital in excess of par value	0	143
Accumulated other comprehensive loss	(362)	(362)
Retained earnings	8,691	11,989
Treasury stock, at cost	(6,021)	(6,427)
Company shareholders’ equity	4,974	8,012
Noncontrolling interest in consolidated subsidiaries	9	13
Total shareholders’ equity	4,983	8,025
Total liabilities and shareholders’ equity	$ 20,680	$ 25,377
Common Stock, Par or Stated Value Per Share	$ 2.50	$ 2.50
Common Stock, Shares Authorized	2,000	2,000
Common Stock, Shares, Issued	1,066	1,068
Treasury Stock, Shares	181	190
Assets Held-for-sale, Not Part of Disposal Group, Current	$ 550	$ 180
Long-term Debt, Current Maturities	695	11
Deferred Income Tax Assets, Net	$ 2,166	$ 1,683

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net income (loss)	$ (2,942)	$ (1,129)	$ 1,657
Adjustments to reconcile net income (loss) to cash flows from operating activities:
Impairments and other charges	3,799	2,506	265
Cash impact of impairments and other charges - severance payments	(350)	(144)	0
Depreciation, depletion and amortization	1,058	1,625	1,606
Deferred income tax provision (benefit), continuing operations	(444)	(396)	(267)
Changes in assets and liabilities:
Receivables	1,394	636	(186)
Accounts payable	(934)	(595)	483
Inventories	340	(202)	(681)
Other operating activities	120	182	349
Total cash flows provided by operating activities	1,881	2,445	3,157
Cash flows from investing activities:
Capital expenditures	(728)	(1,530)	(2,026)
Proceeds from sales of property, plant and equipment	286	190	218
Payments to acquire businesses, net of cash acquired	0	0	(187)
Other investing activities	(44)	(105)	2
Total cash flows used in investing activities	(486)	(1,445)	(1,993)
Cash flows from financing activities:
Dividends to shareholders	(278)	(630)	(630)
Proceeds from issuance of common stock	87	118	195
Stock repurchase program	(100)	(100)	(400)
Payments on long-term borrowings	(1,654)	(13)	(445)
Other financing activities	(56)	(70)	(139)
Total cash flows used in financing activities	(1,007)	(695)	(1,419)
Effect of exchange rate changes on cash	(93)	(45)	(74)
Cash and equivalents at beginning of year	2,268	2,008	2,337
Cash and equivalents at end of year	2,563	2,268	2,008
Cash payments (receipts) during the period for:
Interest	509	534	556
Income taxes	300	363	178
Increase (Decrease) in Employee Related Liabilities	(160)	(38)	(69)
Proceeds from Issuance of Long-term Debt	994	0	0
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	$ 295	$ 260	$ (329)

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions	Total	Common Stock	Paid-in Capital in Excess of Par Value	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest in Consolidated Subsidiaries
Beginning balance at Dec. 31, 2017	$ 8,349	$ 2,673	$ 207	$ (6,757)	$ 12,668	$ (469)	$ 27
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,657	0	0	0	1,656	0	1
Other comprehensive income (loss)	114	0	0	0	0	114	0
Cash dividends	(630)	0	0	0	(630)	0
Cash dividends - Noncontrolling interest							0
Stock plans	415	(2)	4	413	0	0	0
Stock repurchase program	(400)	0	0	(400)	0	0	0
Other	39	0	0	0	(45)	0	(6)
Ending balance at Dec. 31, 2018	$ 9,544	2,671	211	(6,744)	13,739	(355)	22
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Declared	$ 0.72
Net income (loss)	$ (1,129)	0	0	0	(1,131)	0	2
Other comprehensive income (loss)	(8)	0	0	0	0	(8)	0
Cash dividends	(630)	0	0	0	(630)	0
Cash dividends - Noncontrolling interest							0
Stock plans	348	(2)	(67)	417	0	0	0
Stock repurchase program	(100)	0	0	(100)	0	0	0
Other	0	0	1	0	11	(1)	(11)
Ending balance at Dec. 31, 2019	$ 8,025	2,669	143	(6,427)	11,989	(362)	13
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Declared	$ 0.72
Net income (loss)	$ (2,942)	0	0	0	(2,945)	0	3
Other comprehensive income (loss)	0
Cash dividends	(278)	0	0	0	(278)	0
Cash dividends - Noncontrolling interest							0
Stock plans	285	(3)	(143)	506	(75)	0	0
Stock repurchase program	(100)	0	0	(100)	0	0	0
Other	(7)	0	0	0	0	0	(7)
Ending balance at Dec. 31, 2020	$ 4,983	$ 2,666	$ 0	$ (6,021)	$ 8,691	$ (362)	$ 9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Declared	$ 0.315

Description of Company and Sign

Description of Company and Significant Accounting Policies	12 Months Ended
	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Company and Significant Accounting Policies	Description of Company and Significant Accounting Policies Description of Company Halliburton Company is one of the world's largest providers of products and services to the energy industry. Its predecessor was established in 1919 and incorporated under the laws of the State of Delaware in 1924. We help our customers maximize asset value throughout the lifecycle of the reservoir - from locating hydrocarbons and managing geological data, to drilling and formation evaluation, well construction and completion, and optimizing production throughout the life of the asset. We serve major, national, and independent oil and natural gas companies throughout the world and operate under two divisions, which form the basis for the two operating segments we report, the Completion and Production segment and the Drilling and Evaluation segment. Use of estimates Our financial statements are prepared in conformity with United States generally accepted accounting principles, requiring us to make estimates and assumptions that affect: - the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements; and - the reported amounts of revenue and expenses during the reporting period. We believe the most significant estimates and assumptions are associated with the forecasting of our income tax (provision) benefit and the valuation of deferred taxes, legal reserves, long-lived asset valuations, and allowance for credit losses. Ultimate results could differ from our estimates. Basis of presentation The consolidated financial statements include the accounts of our company and all of our subsidiaries that we control or variable interest entities for which we have determined that we are the primary beneficiary. All material intercompany accounts and transactions are eliminated. Investments in companies in which we do not have a controlling interest, but over which we do exercise significant influence, are accounted for using the equity method of accounting. If we do not have significant influence, we use the cost method of accounting. In addition, certain reclassifications of prior period balances have been made to conform to the current period presentation. Revenue recognition Our services and products are generally sold based upon purchase orders or contracts with our customers that include fixed or determinable prices but do not include right of return provisions or other significant post-delivery obligations. The vast majority of our service and product contracts are short-term in nature. We recognize revenue based on the transfer of control or our customers' ability to benefit from our services and products in an amount that reflects the consideration we expect to receive in exchange for those services and products. We also assess our customers' ability and intention to pay, which is based on a variety of factors, including our historical payment experience with, and the financial condition of our customers. Rates for services are typically priced on a per day, per meter, per man-hour, or similar basis. See Note 4 for further information on revenue recognition. Research and development We maintain an active research and development program. The program improves products, processes, and engineering standards and practices that serve the changing needs of our customers, such as those related to high pressure and high temperature environments, and also develops new products and processes. Research and development costs are expensed as incurred and were $309 million in 2020, $404 million in 2019, and $390 million in 2018. Cash equivalents We consider all highly liquid investments with an original maturity of three months or less to be cash equivalents. Inventories Inventories are stated at the lower of cost and net realizable value. Cost represents invoice or production cost for new items and original cost. Production cost includes material, labor, and manufacturing overhead. Our inventory is recorded on the weighted average cost method. We regularly review inventory quantities on hand and record provisions for excess or obsolete inventory based primarily on historical usage, estimated product demand, and technological developments. Allowance for credit losses We establish an allowance for credit losses through a review of several factors, including historical collection experience, current aging status of the customer accounts, and current financial condition of our customers. Losses are charged against the allowance when the customer accounts are determined to be uncollectible. Property, plant and equipment Other than those assets that have been written down to their fair values due to impairment, property, plant, and equipment are reported at cost less accumulated depreciation, which is generally provided on the straight-line method over the estimated useful lives of the assets. Accelerated depreciation methods are often used for tax purposes, when permitted. Upon sale or retirement of an asset, the related costs and accumulated depreciation are removed from the accounts and any gain or loss is recognized. Planned major maintenance costs are generally expensed as incurred. Expenditures for additions, modifications, and conversions are capitalized when they increase the value or extend the useful life of the asset. Goodwill and other intangible assets We record as goodwill the excess purchase price over the fair value of the tangible and identifiable intangible assets acquired in a business acquisition. Changes in the carrying amount of goodwill are detailed below by reportable segment. Millions of dollars Completion and Production Drilling and Evaluation Total Balance at December 31, 2018: $ 2,055 $ 770 $ 2,825 Current year acquisitions 6 5 11 Purchase price adjustments for previous acquisitions (1) (1) (2) Other (21) (1) (22) Balance at December 31, 2019: $ 2,039 $ 773 $ 2,812 Other (66) 58 (8) Balance at December 31, 2020: $ 1,973 $ 831 $ 2,804 The reported amounts of goodwill for each reporting unit are reviewed for impairment on an annual basis, during the third quarter, and more frequently when circumstances indicate an impairment may exist. As a result of our goodwill impairment assessments performed in the years ended December 31, 2020, 2019, and 2018, we determined that the fair value of each reporting unit exceeded its net book value and, therefore, no goodwill impairments were deemed necessary. For further information on our goodwill impairment assessments, see "Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations – Critical Accounting Estimates.” We amortize other identifiable intangible assets with a finite life on a straight-line basis over the period which the asset is expected to contribute to our future cash flows, ranging from one year to twenty-eight years. The components of these other intangible assets generally consist of patents, license agreements, non-compete agreements, trademarks, and customer lists and contracts. Evaluating impairment of long-lived assets When events or changes in circumstances indicate that long-lived assets other than goodwill may be impaired, an evaluation is performed. For assets classified as held for use, we first group individual assets based on the lowest level for which identifiable cash flows are largely independent of the cash flows from other assets. We then compare estimated future undiscounted cash flows expected to result from the use and eventual disposition of the asset group to its carrying amount. If the asset group's undiscounted cash flows are less than its carrying amount, we then determine the asset group's fair value by using a discounted cash flow analysis and recognize any resulting impairment. When an asset is classified as held for sale, the asset’s book value is evaluated and adjusted to the lower of its carrying amount or fair value less cost to sell. In addition, depreciation and amortization is ceased while it is classified as held for sale. See Note 2 for further information on impairments and other charges recorded in 2020. Income taxes We recognize the amount of taxes payable or refundable for the year. In addition, deferred tax assets and liabilities are recognized for the expected future tax consequences of events that have been recognized in the financial statements or tax returns. A valuation allowance is provided for deferred tax assets if it is more likely than not that these items will not be realized. In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Management considers the scheduled reversal of deferred tax liabilities, projected future taxable income, and tax planning strategies in making this assessment. Based upon the level of historical taxable income and projections for future taxable income over the periods in which the deferred tax assets are deductible, management believes it is more likely than not that we will realize the benefits of these deductible differences, net of the existing valuation allowances. We recognize interest and penalties related to unrecognized tax benefits within the provision for income taxes on continuing operations in our consolidated statements of operations. Derivative instruments At times, we enter into derivative financial transactions to hedge existing or projected exposures to changing foreign currency exchange rates and interest rates. We do not enter into derivative transactions for speculative or trading purposes. We recognize all derivatives on the balance sheet at fair value. Derivatives that are not hedges are adjusted to fair value and reflected through the results of operations. If the derivative is designated as a hedge, depending on the nature of the hedge, changes in the fair value of derivatives are either offset against: - the change in fair value of the hedged assets, liabilities or firm commitments through earnings; or - recognized in other comprehensive income until the hedged item is recognized in earnings. The ineffective portion of a derivative’s change in fair value is recognized in earnings. Recognized gains or losses on derivatives entered into to manage foreign currency exchange risk are included in “Other, net” on the consolidated statements of operations. Gains or losses on interest rate derivatives are included in “Interest expense, net.” Foreign currency translation Foreign entities whose functional currency is the United States dollar translate monetary assets and liabilities at year-end exchange rates, and nonmonetary items are translated at historical rates. Revenue and expense transactions are translated at the average rates in effect during the year, except for those expenses associated with nonmonetary balance sheet accounts, which are translated at historical rates. Gains or losses from remeasurement of monetary assets and liabilities due to changes in exchange rates are recognized in our consolidated statements of operations in “Other, net” in the year of occurrence. Stock-based compensation Stock-based compensation cost is measured at the date of grant, based on the calculated fair value of the award and is recognized as expense over the employee’s service period, which is generally the vesting period of the equity grant. Additionally, compensation cost is recognized based on awards ultimately expected to vest, therefore, we have reduced the cost for estimated forfeitures based on historical forfeiture rates. Forfeitures are estimated at the time of grant and revised in subsequent periods to reflect actual forfeitures. See Note 13 for additional information related to stock-based compensation.

Impairment and Other Charges (N

Impairment and Other Charges (Notes)	12 Months Ended
	Dec. 31, 2020
Impairments and Other Charges [Abstract]
Impairments and Other Charges	Impairments and Other Charges The oil and gas industry experienced an unprecedented disruption during 2020 as a result of a combination of factors, including the substantial decline in global demand for oil caused by the COVID-19 pandemic and subsequent mitigation efforts. This disruption created a substantial surplus of oil and a decline in oil prices. West Texas Intermediate (WTI) oil spot prices decreased during the first quarter of 2020 from a high of $63 per barrel in early January of 2020 to approximately $21 per barrel by the end of the first quarter of 2020. Although oil prices recovered moderately to approximately $48 per barrel by the end of December 2020, WTI oil spot prices averaged approximately $43 per barrel during the fourth quarter of 2020 and $39 per barrel during the year 2020, which was approximately 25% and 31%, respectively, less than the average price per barrel during the same periods in 2019. As a result, oil and gas activity declined significantly during 2020, with the global rig count sinking to the lowest level since 1973. The U.S. and international average rig counts dropped 54% and 25%, respectively, during 2020, contributing to a global rig count decline of 38% since December 31, 2019. In the first and second quarters of 2020, we determined these events constituted triggering events that required us to review the recoverability of our long-lived assets and perform an interim goodwill impairment assessment as of March 31, 2020 and May 1, 2020. We determined the fair value of our long-lived assets based on a discounted cash flow analysis, with the exception of real estate facilities which are classified as held for sale for which fair value was based on third party sales price estimates. We determined the fair value for each reporting unit in our goodwill impairment assessment using both a discounted cash flow analysis and a multiples-based market approach for comparable companies. Given the current volatile market environment, we utilized third-party valuation advisors to assist us with these valuations. These analyses included significant judgment, including management’s short-term and long-term forecast of operating performance, discount rates based on our weighted average cost of capital, revenue growth rates, profitability margins, capital expenditures, the timing of future cash flows based on an eventual recovery of the oil and gas industry, and in the case of long-lived assets, the remaining useful life and service potential of the asset. These impairment assessments incorporate inherent uncertainties, including projected commodity pricing, supply and demand for our services and future market conditions, which are difficult to predict in volatile economic environments and could result in impairment charges in future periods if actual results materially differ from the estimated assumptions utilized in our forecasts. Based upon our impairment assessments, we determined the carrying amount of some of our long-lived assets exceeded their respective fair values. As a result of our goodwill impairment assessments, we determined that the fair value of each reporting unit exceeded its net book value and, therefore, no goodwill impairments were deemed necessary. As a result of the events described above, we recorded impairments and other charges of approximately $3.8 billion during the year ended December 31, 2020. The following table presents various pre-tax charges we recorded during the years ended December 31, 2020, 2019, and 2018 which are reflected within "Impairments and other charges" on our consolidated statements of operations. Year Ended December 31 Millions of dollars 2020 2019 2018 Long-lived asset impairments $ 2,629 $ 1,603 $ — Inventory costs and write-downs 505 458 — Severance 384 172 — Joint ventures — 154 — Venezuela investment write-down — — 265 Other 281 119 — Total impairments and other charges $ 3,799 $ 2,506 $ 265 Of the $3.8 billion of impairments and other charges recorded during the year ended December 31, 2020, approximately $2.4 billion was attributable to our Completion and Production segment and approximately $1.4 billion was attributable to our Drilling and Evaluation segment. Long-lived asset impairments include impairments of property, plant, and equipment, intangible assets, and real estate facilities. The $2.6 billion of long-lived asset impairments during 2020 consisted of the following: $1.0 billion attributable to hydraulic fracturing equipment, the majority of which was located in North America; $297 million related to drilling-related services equipment; $191 million related to right-of-use assets, primarily operating leases; $131 million related to intangible assets; and $394 million associated with other fixed asset impairments. Also included in Long-lived asset impairments is $616 million related to real estate properties, primarily related to a fair value adjustment for a contemplated structured transaction for most of our remaining North America real estate owned assets classified as held for sale, and to approximately 50% of North American facilities being closed, sold, consolidated, or reduced in size during 2020. For the year ended December 31, 2019, the $1.6 billion of long-lived asset impairments consisted of the following: $759 million attributable to hydraulic fracturing equipment, the majority of which was located in North America; $243 million related to legacy drilling equipment; $215 million related to real estate owned and classified as held for sale; $139 million related to right-of-use assets associated with operating leases; $98 million related to intangible assets; and $148 million of other fixed asset impairments. We also rationalized our portfolio of existing joint ventures and recorded resulting charges within "Joint ventures" in the table above. Inventory costs and write-downs in the table above primarily represent disposal of excess inventory, including drilling fluids and other chemicals, and write-downs in which some of our inventory cost exceeded its market value. For the year ended December 31, 2018, the $265 million impairment related to a write-down of all of our remaining investment in Venezuela. Given the dynamic nature of the COVID-19 pandemic and related market conditions, we cannot reasonably estimate the period that these events will persist or the full extent of the impact they will have on our business. If market conditions continue to deteriorate, including crude oil prices further declining or remaining at low levels for a sustained period, we may record further asset impairments, which may include an impairment of the carrying value of our goodwill.

Business Segment and Geographic

Business Segment and Geographic Information	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Business Segment and Geographic Information	Business Segment and Geographic InformationWe operate under two divisions, which form the basis for the two operating segments we report: the Completion and Production segment and the Drilling and Evaluation segment. Our equity in earnings and losses of unconsolidated affiliates that are accounted for using the equity method of accounting are included within cost of services and cost of sales on our statements of operations, which is part of operating income of the applicable segment. Operations by business segment The following tables present financial information on our business segments. Year Ended December 31 Millions of dollars 2020 2019 2018 Revenue: Completion and Production $ 7,839 $ 14,031 $ 15,973 Drilling and Evaluation 6,606 8,377 8,022 Total revenue $ 14,445 $ 22,408 $ 23,995 Operating income: Completion and Production $ 995 $ 1,671 $ 2,278 Drilling and Evaluation 569 642 745 Total operations 1,564 2,313 3,023 Corporate and other (a) (201) (255) (291) Impairments and other charges (b) (3,799) (2,506) (265) Total operating income (loss) $ (2,436) $ (448) $ 2,467 Interest expense, net of interest income $ (505) $ (569) $ (554) Loss on early extinguishment of debt (168) — — Other, net (111) (105) (99) Income (loss) before income taxes $ (3,220) $ (1,122) $ 1,814 Capital expenditures: Completion and Production $ 314 $ 800 $ 1,364 Drilling and Evaluation 410 728 657 Corporate and other 4 2 5 Total $ 728 $ 1,530 $ 2,026 Depreciation, depletion and amortization: Completion and Production $ 615 $ 1,049 $ 1,058 Drilling and Evaluation 430 552 512 Corporate and other 13 24 36 Total $ 1,058 $ 1,625 $ 1,606 (a) Includes certain expenses not attributable to a business segment, such as costs related to support functions and corporate executives, operating lease assets, and also includes amortization expense associated with intangible assets recorded as a result of acquisitions. (b) Impairments and other charges are as follows: -For the year ended December 31, 2020, amount includes approximately $2.4 billion attributable to Completion and Production, $1.4 billion attributable to Drilling and Evaluation, and $62 million attributable to Corporate and other. -For the year ended December 31, 2019, amount includes approximately $1.6 billion attributable to Completion and Production, $849 million attributable to Drilling and Evaluation, and $56 million attributable to Corporate and other. -For the years ended December 31, 2018, we recorded aggregate charges of $265 million to write-down our investment in Venezuela. December 31 Millions of dollars 2020 2019 Total assets: Completion and Production (a) $ 7,924 $ 11,894 Drilling and Evaluation (a) 6,371 8,059 Corporate and other (b) 6,385 5,424 Total $ 20,680 $ 25,377 (a) Assets associated with specific segments primarily include receivables, inventories, property, plant, and equipment, operating lease right-of-use assets, equity in and advances to related companies, and goodwill. (b) Corporate and other primarily include cash and equivalents and deferred tax assets. Operations by geographic region The following tables present information by geographic area. In 2020, 2019, and 2018, based on the location of services provided and products sold, 38%, 51%, and 58%, respectively, of our consolidated revenue was from the United States. No other country accounted for more than 10% of our revenue or property, plant, and equipment during the periods presented. As of December 31, 2020 and December 31, 2019, 49% and 59% of our property, plant, and equipment was located in the United States. Year Ended December 31 Millions of dollars 2020 2019 2018 Revenue: North America $ 5,731 $ 11,884 $ 14,431 Latin America 1,668 2,364 2,065 Europe/Africa/CIS 2,813 3,285 2,945 Middle East/Asia 4,233 4,875 4,554 Total $ 14,445 $ 22,408 $ 23,995 December 31 Millions of dollars 2020 2019 Net property, plant and equipment: North America $ 2,211 $ 4,666 Latin America 544 754 Europe/Africa/CIS 602 772 Middle East/Asia 968 1,118 Total $ 4,325 $ 7,310

Revenue (Notes)

Revenue (Notes)	12 Months Ended
	Dec. 31, 2020
Revenue [Abstract]
Revenue	Revenue Revenue is recognized based on the transfer of control or our customers' ability to benefit from our services and products in an amount that reflects the consideration we expect to receive in exchange for those services and products. The vast majority of our service and product contracts are short-term in nature. In recognizing revenue for our services and products, we determine the transaction price of purchase orders or contracts with our customers, which may consist of fixed and variable consideration. We also assess our customers' ability and intention to pay, which is based on a variety of factors, including our historical payment experience with, and the financial condition of our customers. Payment terms and conditions vary by contract type, although terms generally include a requirement of payment within 20 to 60 days. Other judgments involved in recognizing revenue include an assessment of progress towards completion of performance obligations for certain long-term contracts, which involve estimating total costs to determine our progress towards contract completion, and calculating the corresponding amount of revenue to recognize. Disaggregation of revenue We disaggregate revenue from contracts with customers into types of services or products, consistent with our two reportable segments, in addition to geographical area. Based on the location of services provided and products sold, 38%, 51%, and 58% of our consolidated revenue was from the United States for the years ended December 31, 2020, 2019, and 2018, respectively. No other country accounted for more than 10% of our revenue. The following table presents information on our disaggregated revenue. Year Ended December 31 Millions of dollars 2020 2019 2018 Revenue by segment: Completion and Production $ 7,839 $ 14,031 $ 15,973 Drilling and Evaluation 6,606 8,377 8,022 Total revenue $ 14,445 $ 22,408 $ 23,995 Revenue by geographic region: North America $ 5,731 $ 11,884 $ 14,431 Latin America 1,668 2,364 2,065 Europe/Africa/CIS 2,813 3,285 2,945 Middle East/Asia 4,233 4,875 4,554 Total revenue $ 14,445 $ 22,408 $ 23,995 Contract balances We perform our obligations under contracts with our customers by transferring services and products in exchange for consideration. The timing of our performance often differs from the timing of our customer’s payment, which results in the recognition of receivables and deferred revenue. Deferred revenue represents advance consideration received from customers for contracts where revenue is recognized on future performance of service. Deferred revenue, as well as revenue recognized during the period relating to amounts included as deferred revenue at the beginning of the period, was not material to our consolidated financial statements. Transaction price allocated to remaining performance obligations Remaining performance obligations represent firm contracts for which work has not been performed and future revenue recognition is expected. We have elected the practical expedient permitting the exclusion of disclosing remaining performance obligations for contracts that have an original expected duration of one year or less. We have some long-term contracts related to software and integrated project management services such as lump sum turnkey contracts. For software contracts, revenue is generally recognized over time throughout the license period when the software is considered to be a right to access our intellectual property. For lump sum turnkey projects, we recognize revenue over time using an input method, which requires us to exercise judgment. Revenue allocated to remaining performance obligations for these long-term contracts is not material.

Receivables

Receivables	12 Months Ended
	Dec. 31, 2020
Receivables [Abstract]
Receivables	Receivables As of December 31, 2020, 32% of our net trade receivables were from customers in the United States. As of December 31, 2019, 36% of our net trade receivables were from customers in the United States. No other country or single customer accounted for more than 10% of our net trade receivables at these dates. We routinely monitor the financial stability of our customers and employ an extensive process to evaluate the collectability of outstanding receivables. This process, which involves judgment utilizing significant assumptions, includes analysis of our customers’ historical time to pay, financial condition and various financial metrics, debt structure, credit agency ratings, and production profile, as well as political and economic factors in countries of operations and other customer-specific factors. The table below presents a rollforward of our global allowance for credit losses for 2018, 2019 and 2020. Millions of dollars Balance at Beginning of Period Provision (a) Balance at End of Period (c) Year ended December 31, 2018 $ 725 $ 57 $ (44) $ 738 Year ended December 31, 2019 738 50 (12) 776 Year ended December 31, 2020 776 58 (10) 824 (a) Represents increases to allowance for credit losses charged to costs and expenses, net of recoveries. (b) Includes write-offs, balance sheet reclassifications, and other activity. (c) The allowance for credit losses in all years is primarily comprised of a full reserve against accounts receivable with our primary customer in Venezuela.

Leases (Notes)

Leases (Notes)	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Leases	Leases We adopted a comprehensive new lease accounting standard effective January 1, 2019. The details of the significant changes to our accounting policies resulting from the adoption of the new standard are set out below. We adopted the standard using the optional modified retrospective transition method; accordingly, the comparative information as of December 31, 2018 and for the year ended December 31, 2018 has not been adjusted and continues to be reported under the previous lease standard. Under the new lease standard, assets and liabilities that arise from all leases are required to be recognized on the balance sheet for lessees. Previously, only capital leases, which are now referred to as finance leases, were recorded on the balance sheet. The adoption of this standard resulted in the recognition of approximately $1.0 billion of operating lease right-of-use assets and operating lease liabilities on our consolidated balance sheet as of January 1, 2019. The adoption of this standard did not materially impact our consolidated results of operations for the year ended December 31, 2019. Beginning January 1, 2019, for all leases with a term in excess of 12 months, we recognized a lease liability equal to the present value of the lease payments and a right-of-use asset representing our right to use the underlying asset for the lease term. For operating leases, lease expense for lease payments is recognized on a straight-line basis over the lease term and accretion of the lease liability, while finance leases include both an operating expense and an interest expense component. For all leases with a term of 12 months or less, we elected the practical expedient to not recognize lease assets and liabilities. We recognize lease expense for these short-term leases on a straight-line basis over the lease term. We are a lessee for numerous operating leases, primarily related to real estate, transportation, and equipment. The vast majority of our operating leases have remaining lease terms of 10 years or less, some of which include options to extend the leases, and some of which include options to terminate the leases. We generally do not include renewal or termination options in our assessment of the leases unless extension or termination for certain assets is deemed to be reasonably certain. The accounting for some of our leases may require judgment, which includes determining whether a contract contains a lease, determining the incremental borrowing rates to utilize in our net present value calculation of lease payments for lease agreements which do not provide an implicit rate, and assessing the likelihood of renewal or termination options. We also have some lease agreements with lease and non-lease components, which are generally accounted for as a single lease component. For certain equipment leases, such as offshore vessels and drilling rigs, we account for the lease and non-lease components separately. The following tables illustrate the financial impact of our leases as of and for the years ended December 31, 2020 and December 31, 2019, along with other supplemental information about our existing leases: Year Ended December 31 Millions of dollars 2020 2019 Components of lease expense: Finance lease cost: Amortization of right-of-use assets $ 19 $ 19 Interest on lease liabilities 32 51 Operating lease cost 296 355 Short-term lease cost 31 110 Sublease income (4) (5) Total lease cost $ 374 $ 530 For the year ended December 31, 2018, total rentals on our operating leases under the previous lease standard, net of sublease rentals, was $680 million. As of December 31 Millions of dollars 2020 2019 Components of balance sheet: Operating leases: Operating lease right-of-use assets (non-current) $ 786 $ 931 Current portion of operating lease liabilities 251 208 Operating lease liabilities (non-current) 758 825 Finance leases: Other assets (non-current) $ 113 $ 123 Other current liabilities 24 19 Other liabilities (non-current) 118 124 During the years ended December 31, 2020 and December 31, 2019, impairment charges were recorded related to operating and finance lease right-of-use assets totaling $191 million and $139 million, respectively. See Note 2 to the consolidated financial statements for further discussion on impairments and other charges. Year Ended December 31 Millions of dollars except years and percentages 2020 2019 Other supplemental information: Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 299 $ 316 Operating cash flows from finance leases 32 51 Financing cash flows from finance leases 21 24 Right-of-use assets obtained in exchange for lease obligations: Operating leases (a) $ 447 $ 1,362 Finance leases 39 74 Weighted-average remaining lease term: Operating leases 8.6 years 9.5 years Finance leases 6.4 years 5.4 years Weighted-average discount rate for operating leases 4.1 % 4.4 % (a) The 2019 balance primarily consists of operating lease right-of-use assets exchanged for lease obligations upon implementation of the new lease accounting standard on January 1, 2019. The following table summarizes the maturity of our operating and finance leases as of December 31, 2020: Millions of dollars Operating Leases Finance Leases 2021 $ 287 $ 63 2022 233 63 2023 146 62 2024 94 49 2025 70 38 Thereafter 428 55 Total lease payments 1,258 330 Less imputed interest (249) (188) Total $ 1,009 $ 142

Inventories

Inventories	12 Months Ended
	Dec. 31, 2020
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories consisted of the following: December 31 Millions of dollars 2020 2019 Finished products and parts $ 1,330 $ 1,865 Raw materials and supplies 952 1,147 Work in process 67 127 Total $ 2,349 $ 3,139 All amounts in the table above are reported net of obsolescence reserves of $150 million at December 31, 2020 and $149 million at December 31, 2019. During the year ended December 31, 2020, we recorded $505 million of impairment charges related to inventory. These charges primarily consisted of the disposal of excess inventory, including drilling fluids and other chemicals, and write-downs in which some of our inventory cost exceeded its market value.

Property, Plant, and Equipment

Property, Plant, and Equipment	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Property, Plant, and Equipment	Property, Plant, and Equipment Property, plant, and equipment were composed of the following: December 31 Millions of dollars 2020 2019 Land $ 120 $ 202 Buildings and property improvements 1,652 3,167 Machinery, equipment, and other 13,592 16,571 Total 15,364 19,940 Less accumulated depreciation 11,039 12,630 Net property, plant, and equipment $ 4,325 $ 7,310 During the year ended December 31, 2020, a $2.3 billion impairment charge was recorded related to property, plant, and equipment. See Note 2 to the consolidated financial statements for further discussion on impairments and other charges. Classes of assets are depreciated over the following useful lives: Buildings and Property 2020 2019 1 - 10 years 13% 12% 11 - 20 years 41% 41% 21 - 30 years 21% 22% 31 - 40 years 25% 25% Machinery, Equipment, 2020 2019 1 - 5 years 49% 43% 6 - 10 years 41% 47% 11 - 20 years 10% 10%

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies The Company is subject to various legal or governmental proceedings, claims or investigations, including personal injury, property damage, environmental, and tax-related matters, arising in the ordinary course of business, the resolution of which, in the opinion of management, will not have a material adverse effect on our consolidated results of operations or consolidated financial position. There is inherent risk in any litigation, claim or investigation and no assurance can be given as to the outcome of these proceedings. Guarantee arrangements In the normal course of business, we have agreements with financial institutions under which approximately $1.9 billion of letters of credit, bank guarantees, or surety bonds were outstanding as of December 31, 2020. Some of the outstanding letters of credit have triggering events that would entitle a bank to require cash collateralization. None of these off balance sheet arrangements either has, or is likely to have, a material effect on our consolidated financial statements.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The components of the (provision) benefit for income taxes on continuing operations were: Year Ended December 31 Millions of dollars 2020 2019 2018 Current income taxes: Federal $ 1 $ 32 $ 19 Foreign (167) (426) (428) State — (9) (15) Total current (166) (403) (424) Deferred income taxes: Federal 372 383 286 Foreign 2 (36) 9 State 70 49 (28) Total deferred 444 396 267 Income tax (provision) benefit $ 278 $ (7) $ (157) The United States and foreign components of income (loss) from continuing operations before income taxes were as follows: Year Ended December 31 Millions of dollars 2020 2019 2018 United States $ (3,031) $ (1,517) $ 1,097 Foreign (189) 395 717 Total $ (3,220) $ (1,122) $ 1,814 Reconciliations between the actual (provision) benefit for income taxes on continuing operations and that computed by applying the United States statutory rate to income (loss) from continuing operations before income taxes were as follows: Year Ended December 31 2020 2019 2018 United States statutory rate 21.0 % 21.0 % 21.0 % Impact of impairments and other charges (12.3) (20.9) — Impact of foreign income taxed at different rates (1.1) 0.8 (3.0) Valuation allowance against tax assets 0.9 (10.7) (16.2) Adjustments of prior year taxes 0.7 13.0 2.0 State income taxes — (1.3) 1.9 Venezuela adjustment — — 5.7 Impact of U.S. tax reform — — (2.6) Other items, net (0.6) (2.5) (0.1) Total effective tax rate on continuing operations 8.6 % (0.6) % 8.7 % During the year ended December 31, 2020, we recorded a total income tax benefit of $278 million on a pre-tax loss of $3.2 billion, resulting in an effective tax rate of 8.6%. The effective tax rate for 2020 was primarily impacted by our geographic mix of earnings, tax adjustments related to the reassessment of prior year tax accruals and valuation allowances on some of our deferred tax assets. The increase in our valuation allowances results from our decreased forecasted ability to generate sufficient taxable income before the expiration of foreign tax credits and net operating losses as a direct result of deteriorated market conditions that led to impairment charges of $3.8 billion in 2020 and $2.5 billion in 2019. See Note 2 for further information. The primary components of our deferred tax assets and liabilities were as follows: December 31 Millions of dollars 2020 2019 Gross deferred tax assets: Net operating loss carryforwards $ 1,691 $ 1,301 Foreign tax credit carryforwards 945 877 Research and development tax credit carryforwards 196 198 Employee compensation and benefits 237 215 Accrued liabilities 263 316 Other 469 382 Total gross deferred tax assets 3,801 3,289 Gross deferred tax liabilities: Depreciation and amortization 7 373 Operating lease right-of-use assets 86 109 Other 155 58 Total gross deferred tax liabilities 248 540 Valuation allowances 1,394 1,082 Net deferred income tax asset $ 2,159 $ 1,667 At December 31, 2020, we had $1.8 billion of domestic and foreign tax-effected net operating loss carryforwards, with approximately $133 million estimated to be utilized against our unrecognized tax benefits. The ultimate realization of these deferred tax assets depends on our ability to generate sufficient taxable income in the appropriate taxing jurisdiction. Our deferred tax assets from net operating losses, foreign tax credits, and research and development credits will expire as follows: Millions of dollars U.S. Net Operating Loss Foreign Net Operating Loss Foreign Tax Credits Research and Development Credit Total 2021-2025 $ 2 $ 186 $ 533 $ — $ 721 2026-2030 7 125 557 — 689 2031-2041 665 92 — 196 953 Non-Expiring 312 435 — — 747 $ 986 $ 838 $ 1,090 $ 196 $ 3,110 During the year ended December 31, 2020, we increased our valuation allowance on deferred tax assets by $312 million related to $16 million associated with foreign deferred tax assets and $296 million associated with foreign tax credits. In accordance with the Tax Cuts and Jobs Act of 2017, a company’s foreign earnings accumulated under the legacy tax laws are deemed to be repatriated into the United States. We have provided federal and state income tax related to this deemed repatriation. We have not provided incremental United States income taxes and foreign withholding taxes on undistributed earnings of foreign subsidiaries as of December 31, 2020. The Company generally does not provide for taxes related to its undistributed earnings because such earnings either would not be taxable when remitted or they are considered to be indefinitely reinvested. The following table presents a rollforward of our unrecognized tax benefits and associated interest and penalties. Millions of dollars Unrecognized Tax Benefits Interest Balance at January 1, 2018 $ 333 $ 60 Change in prior year tax positions 32 11 Change in current year tax positions 63 — Cash settlements with taxing authorities (7) (2) Lapse of statute of limitations (4) (2) Balance at December 31, 2018 $ 417 $ 67 Change in prior year tax positions 25 11 Change in current year tax positions 29 — Cash settlements with taxing authorities (4) — Lapse of statute of limitations (42) (8) Balance at December 31, 2019 $ 425 (a) $ 70 Change in prior year tax positions (66) 6 Change in current year tax positions 16 — Cash settlements with taxing authorities (3) — Lapse of statute of limitations (17) (5) Balance at December 31, 2020 $ 355 (a)(b) $ 71 (a) Includes $18 million as of December 31, 2020 and $25 million as of December 31, 2019 in foreign unrecognized tax benefits that would give rise to a United States tax credit. As of December 31, 2020 and December 31, 2019, a net $224 million and $271 million without a net operating loss carryforward offset, respectively, of unrecognized tax benefits would positively impact the effective tax rate and be recognized as additional tax benefits in our statement of operations if resolved in our favor. (b) Includes $17 million that could be resolved within the next 12 months. Our tax returns are subject to review by the taxing authorities in the jurisdictions where we file tax returns. In most cases we are no longer subject to examination by tax authorities for years before 2009. The only significant operating jurisdiction that has tax filings under review or subject to examination by the tax authorities is the United States. The United States federal income tax filings for tax years 2016 through 2019 are currently under review or remain open for review by the U.S. Internal Revenue Service.

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2020
Stockholders' Equity Note [Abstract]
Shareholders' Equity	Shareholders’ Equity Shares of common stock The following table summarizes total shares of common stock outstanding: December 31 Millions of shares 2020 2019 Issued 1,066 1,068 In treasury (181) (190) Total shares of common stock outstanding 885 878 Our Board of Directors has authorized a program to repurchase a specified dollar amount of our common stock from time to time. The program does not require a specific number of shares to be purchased and the program may be effected through solicited or unsolicited transactions in the market or in privately negotiated transactions. The program may be terminated or suspended at any time. During the year ended December 31, 2020 we repurchased approximately 7.4 million shares of our common stock for a total cost of $100 million. There were 4.5 million repurchases made under the program during the year ended December 31, 2019. Approximately $5.1 billion remained authorized for repurchases as of December 31, 2020. From the inception of this program in February 2006 through December 31, 2020, we repurchased approximately 224 million shares of our common stock for a total cost of approximately $9.0 billion. Paid-in Capital in Excess of Par Value During 2020, we issued common stock from treasury shares under our employee stock purchase plan awards and for restricted stock grants. As a result, additional paid in capital was reduced below zero, which resulted in a reduction of retained earnings by $75 million. Additional issuances from treasury shares could similarly impact additional paid in capital and retained earnings. Preferred stock Our preferred stock consists of five million total authorized shares at December 31, 2020, of which none are issued. Accumulated other comprehensive loss Accumulated other comprehensive loss consisted of the following: December 31 Millions of dollars 2020 2019 Defined benefit and other postretirement liability adjustments (a) $ (226) $ (214) Cumulative translation adjustment (83) (82) Other (53) (66) Total accumulated other comprehensive loss $ (362) $ (362) (a) Included net actuarial losses for our international pension plans of $212 million at December 31, 2020 and $189 million at December 31, 2019.

Stock-based Compensation

Stock-based Compensation	12 Months Ended
	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award
Stock-based Compensation	Stock-based Compensation The following table summarizes stock-based compensation costs for the years ended December 31, 2020, 2019 and 2018. Year Ended December 31 Millions of dollars 2020 2019 2018 Stock-based compensation cost $ 218 $ 257 $ 274 Tax benefit (35) (48) (51) Stock-based compensation cost, net of tax $ 183 $ 209 $ 223 Our Stock and Incentive Plan, as amended (Stock Plan), provides for the grant of any or all of the following types of stock-based awards: - stock options, including incentive stock options and nonqualified stock options; - restricted stock awards; - restricted stock unit awards; - stock appreciation rights; and - stock value equivalent awards. There are currently no stock appreciation rights, stock value equivalent awards, or incentive stock options outstanding. Under the terms of the Stock Plan, approximately 247 million shares of common stock have been reserved for issuance to employees and non-employee directors. At December 31, 2020, approximately 23 million shares were available for future grants under the Stock Plan. The stock to be offered pursuant to the grant of an award under the Stock Plan may be authorized but unissued common shares or treasury shares. In addition to the provisions of the Stock Plan, we also have stock-based compensation provisions under the Restricted Stock Plan for Non-Employee Directors and the Employee Stock Purchase Plan (ESPP). Each of the active stock-based compensation arrangements is discussed below. Stock options The majority of our options are generally issued during the second quarter of the year. All stock options under the Stock Plan are granted at the fair market value of our common stock at the grant date. Employee stock options generally vest ratably over a period of three years and expire 10 years from the grant date. Compensation expense for stock options is generally recognized on a straight line basis over the entire vesting period. The following table represents our stock options activity during 2020. Number Weighted Weighted Aggregate Outstanding at January 1, 2020 25.3 $ 41.58 Granted 2.2 24.59 Forfeited/expired (1.6) 37.87 Outstanding at December 31, 2020 25.9 $ 40.36 5.4 $ — Exercisable at December 31, 2020 19.7 $ 44.29 4.5 $ — The total intrinsic value of options exercised was $7 million in 2020, $2 million in 2019 and $25 million in 2018. As of December 31, 2020, there was $20 million of unrecognized compensation cost, net of estimated forfeitures, related to nonvested stock options, which is expected to be recognized over a weighted average period of approximately two years. Cash received from issuance of common stock was $87 million of which none related to proceeds from exercises of stock option during 2020. Cash received from issuance of common stock was $118 million during 2019 and $195 million during 2018, of which $6 million and $88 million related to proceeds from exercises of stock options in 2019 and 2018, respectively. The remainder relates to cash proceeds from the issuance of shares related to our employee stock purchase plan. The fair value of options at the date of grant was estimated using the Black-Scholes option pricing model. The expected volatility of options granted was a blended rate based upon implied volatility calculated on actively traded options on our common stock and upon the historical volatility of our common stock. The expected term of options granted was based upon historical observation of actual time elapsed between date of grant and exercise of options for all employees. The assumptions and resulting fair values of options granted were as follows: Year Ended December 31 2020 2019 2018 Expected term (in years) 5.39 5.31 5.27 Expected volatility 33% 31% 28% Expected dividend yield 2.92 - 3.23% 2.25 - 3.88% 1.37 - 2.29% Risk-free interest rate 1.43 - 1.69% 1.35 - 2.51% 2.27 - 2.84% Weighted average grant-date fair value of option $5.41 $5.91 $11.56 Restricted stock Restricted shares issued under the Stock Plan are restricted as to sale or disposition. These restrictions lapse periodically generally over a period of five years. Restrictions may also lapse for early retirement and other conditions in accordance with our established policies. Upon termination of employment, shares on which restrictions have not lapsed must be returned to us, resulting in restricted stock forfeitures. The fair market value of the stock on the date of grant is amortized and charged to income on a straight-line basis over the requisite service period for the entire award. In 2020, we also granted performance based restricted stock units, with the actual number of shares earned to be determined at the end of a three year performance period based on our achievement of certain predefined targets. These targets are based upon our average return on capital employed as compared to certain competitors and a modifier based upon stock performance compared to the Oilfield Services Index (OSX). A Monte Carlo simulation that uses a probabilistic approach was performed by an actuary to measure grant date fair value. The fair value of these performance based restricted stock units is recognized on a straight-line basis over the three year performance cycle. The following table represents our restricted stock awards and restricted stock units granted, vested, and forfeited during 2020. Number of Shares Weighted Average Nonvested shares at January 1, 2020 18.1 $ 34.72 Granted 8.2 16.53 Vested (5.4) 36.97 Forfeited (1.9) 33.66 Nonvested shares at December 31, 2020 19.0 $ 26.26 The weighted average grant-date fair value of shares granted was $16.53 during 2020, $24.75 during 2019, and $47.43 during 2018. The total fair value of shares vested was $79 million during 2020, $107 million during 2019, and $219 million during 2018. As of December 31, 2020, there was $330 million of unrecognized compensation cost, net of estimated forfeitures, related to nonvested restricted stock, which is expected to be recognized over a weighted average period of three years. Employee Stock Purchase Plan Under the ESPP, eligible employees may have up to 10% of their earnings withheld, subject to some limitations, to be used to purchase shares of our common stock. The ESPP contains four three-month offering periods commencing on January 1, April 1, July 1 and October 1 of each year. The price at which common stock may be purchased under the ESPP is equal to 90% (85% for 2019 and 2018) of the lower of the fair market value of the common stock on the commencement date or last trading day of each offering period. Under the ESPP, 74 million shares of common stock have been reserved for issuance, of which 65 million shares have been sold through the ESPP since the inception of the plan through December 31, 2020 and 9 million shares are available for future issuance. The stock to be offered may be authorized but unissued common shares or treasury shares. The fair value of ESPP shares was estimated using the Black-Scholes option pricing model. The expected volatility was a one-year historical volatility of our common stock. The assumptions and resulting fair values were as follows: Year Ended December 31 2020 2019 2018 Expected volatility 68 % 34 % 25 % Expected dividend yield 4.89 % 3.06 % 1.62 % Risk-free interest rate 0.65 % 2.20 % 1.92 % Weighted average grant-date fair value per share $ 3.18 $ 5.22 $ 8.86

Income per Share

Income per Share	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Income per Share	Income per Share Basic income or loss per share is based on the weighted average number of common shares outstanding during the period. Diluted income per share includes additional common shares that would have been outstanding if potential common shares with a dilutive effect had been issued. Antidilutive securities represent potentially dilutive securities which are excluded from the computation of diluted income or loss per share as their impact was antidilutive. A reconciliation of the number of shares used for the basic and diluted income per share computations is as follows: Year Ended December 31 Millions of shares 2020 2019 2018 Basic weighted average common shares outstanding 881 875 875 Dilutive effect of awards granted under our stock incentive plans — — 2 Diluted weighted average common shares outstanding 881 875 877 Antidilutive shares: Options with exercise price greater than the average market price 27 24 14 Options which are antidilutive due to net loss position 1 1 — Total antidilutive shares 28 25 14

Financial Instruments and Risk

Financial Instruments and Risk Management	12 Months Ended
	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Financial Instruments and Risk Management	Financial Instruments and Risk Management The carrying amount of cash and equivalents, receivables and accounts payable, as reflected in the consolidated balance sheets, approximates fair value due to the short maturities of these instruments. The carrying amount and fair value of our total debt, including short-term borrowings and current maturities of long term debt, is as follows: December 31, 2020 December 31, 2019 Millions of dollars Level 1 Level 2 Total fair value Carrying value Level 1 Level 2 Total fair value Carrying value Total debt $ 10,856 $ 700 $ 11,556 $ 9,827 $ 11,093 $ 868 $ 11,961 $ 10,327 The total fair value of our debt decreased during 2020, primarily due to the early repurchase of senior notes partially offset by lower average yields. See Note 9 for further information. Our debt categorized within level 1 on the fair value hierarchy is calculated using quoted prices in active markets for identical liabilities with transactions occurring on the last two days of period-end. Our debt categorized within level 2 on the fair value hierarchy is calculated using significant observable inputs for similar liabilities where estimated values are determined from observable data points on our other bonds and on other similarly rated corporate debt or from observable data points of transactions occurring prior to two days from period-end and adjusting for changes in market conditions. Differences between the periods presented in our level 1 and level 2 classification of our long-term debt relate to the timing of when transactions are executed. We have no debt categorized within level 3 on the fair value hierarchy based on unobservable inputs. We are exposed to market risk from changes in foreign currency exchange rates and interest rates. We selectively manage these exposures through the use of derivative instruments, including forward foreign exchange contracts, foreign exchange options and interest rate swaps. The objective of our risk management strategy is to minimize the volatility from fluctuations in foreign currency and interest rates. We do not use derivative instruments for trading purposes. The fair value of our forward contracts, options and interest rate swaps was not material as of December 31, 2020 or December 31, 2019. The counterparties to our derivatives are primarily global commercial and investment banks. Foreign currency exchange risk We have operations in many international locations and are involved in transactions denominated in currencies other than the United States dollar, our functional currency, which exposes us to foreign currency exchange rate risk. Techniques in managing foreign currency exchange risk include, but are not limited to, foreign currency borrowing and investing, and the use of currency exchange instruments. We attempt to selectively manage significant exposures to potential foreign currency exchange losses based on current market conditions, future operating activities, and the associated cost in relation to the perceived risk of loss. The purpose of our foreign currency risk management activities is to minimize the risk that our cash flows from the purchase and sale of products and services in foreign currencies will be adversely affected by changes in exchange rates. We use forward contracts and options to manage our exposure to fluctuations in the currencies of certain countries in which we do business internationally. These instruments are not treated as hedges for accounting purposes, generally have an expiration date of one year or less, and are not exchange traded. While these instruments are subject to fluctuations in value, the fluctuations are generally offset by the value of the underlying exposures being managed. The use of some of these instruments may limit our ability to benefit from favorable fluctuations in foreign currency exchange rates. Derivatives are not utilized to manage exposures in some currencies due primarily to the lack of available markets or cost considerations (non-traded currencies). We attempt to manage our working capital position to minimize foreign currency exposure in non-traded currencies and recognize that pricing for the services and products offered in these countries should account for the cost of exchange rate devaluations. We have historically incurred transaction losses in non-traded currencies. The notional amounts of open foreign exchange derivatives were $817 million at December 31, 2020 and $513 million at December 31, 2019. The notional amounts of these instruments do not generally represent amounts exchanged by the parties, and thus are not a measure of our exposure or of the cash requirements related to these contracts. The fair value of our foreign exchange derivatives as of December 31, 2020 and December 31, 2019 is included in “Other current assets” in our consolidated balance sheets and was immaterial. The fair value of these instruments is categorized within level 2 on the fair value hierarchy and was determined using a market approach with certain inputs, such as notional amounts hedged, exchange rates, and other terms of the contracts that are observable in the market or can be derived from or corroborated by observable data. Interest rate risk We are subject to interest rate risk on our existing long-term debt. Our short-term borrowings do not give rise to significant interest rate risk due to their short-term nature. We had fixed rate long-term debt totaling $9.8 billion at December 31, 2020 and $10.3 billion at December 31, 2019. We maintain an interest rate management strategy that is intended to mitigate the exposure to changes in interest rates in the aggregate for our debt portfolio. We use interest rate swaps to effectively convert a portion of our fixed rate debt to floating LIBOR-based rates. Our interest rate swaps, which expire when the underlying debt matures, are designated as fair value hedges of the underlying debt and are determined to be highly effective. These derivative instruments are marked to market with gains and losses recognized currently in interest expense to offset the respective gains and losses recognized on changes in the fair value of the hedged debt. As of December 31, 2020, we had an interest rate swap relating to one of our debt instruments with a total notional amount of $100 million. The fair value of this interest rate swap as of December 31, 2020 and December 31, 2019 is included in “Other assets” in our consolidated balance sheets and was immaterial. The fair value of this interest rate swap is categorized within level 2 on the fair value hierarchy and was determined using a market approach with inputs, such as the notional amount, LIBOR rate spread, and settlement terms that are observable in the market or can be derived from or corroborated by observable data. Credit risk Financial instruments that potentially subject us to concentrations of credit risk are primarily cash equivalents and trade receivables. It is our practice to place our cash equivalents in high quality investments with various institutions. Our trade receivables are from a broad and diverse group of customers and are generally not collateralized. As of December 31, 2020, 32% of our net trade receivables were from customers in the United States. As of December 31, 2019, 36% of our net trade receivables were from customers in the United States. We maintain an allowance for credit losses based upon several factors, including historical collection experience, current aging status of the customer accounts and financial condition of our customers. See Note 5 for further information. We do not have any significant concentrations of credit risk with any individual counterparty to our derivative contracts. We select counterparties to those contracts based on our belief that each counterparty’s profitability, balance sheet, and capacity for timely payment of financial commitments is unlikely to be materially adversely affected by foreseeable events.

Retirement Plans

Retirement Plans	12 Months Ended
	Dec. 31, 2020
Retirement Benefits [Abstract]
Retirement Plans	Retirement Plans Our company and subsidiaries have various plans that cover a significant number of our employees. These plans include defined contribution plans, defined benefit plans, and other postretirement plans: - our defined contribution plans provide retirement benefits in return for services rendered. These plans provide an individual account for each participant and have terms that specify how contributions to the participant’s account are to be determined rather than the amount of pension benefits the participant is to receive. Contributions to these plans are based on a percentage of pre-tax income, after-tax income, or discretionary amounts determined on an annual basis. Our expense for the defined contribution plans totaled $100 million in 2020, $206 million in 2019, and $193 million in 2018. The decrease in expense from 2019 to 2020 was due to significant headcount reductions during the year ended December 31, 2020, coupled with the suspension of discretionary contributions in 2020. - our defined benefit plans, which include both funded and unfunded pension plans, define an amount of pension benefit to be provided, usually as a function of age, years of service and/or compensation. The unfunded obligations and net periodic benefit cost of our United States defined benefit plans were not material for the periods presented; and - our postretirement plans other than pensions are offered to specific eligible employees. The accumulated benefit obligations and net periodic benefit cost for these plans were not material for the periods presented. Funded status For our international pension plans, at December 31, 2020, the projected benefit obligation was $1.2 billion and the fair value of plan assets was $1.1 billion, which resulted in an unfunded obligation of $152 million. At December 31, 2019, the projected benefit obligation was $1.1 billion and the fair value of plan assets was $1.0 billion, which resulted in an unfunded obligation of $111 million. The accumulated benefit obligation for our international plans was $1.1 billion at December 31, 2020 and $1.0 billion at December 31, 2019. The following table presents additional information about our international pension plans. December 31 Millions of dollars 2020 2019 Amounts recognized on the Consolidated Balance Sheets Other Assets $ 45 $ 85 Accrued employee compensation and benefits 8 7 Employee compensation and benefits 189 189 Pension plans in which projected benefit obligation exceeded plan assets Projected benefit obligation $ 228 $ 214 Fair value of plan assets 31 18 Pension plans in which accumulated benefit obligation exceeded plan assets Accumulated benefit obligation $ 126 $ 121 Fair value of plan assets 25 18 Fair value measurements of plan assets The fair value of our plan assets categorized within level 1 on the fair value hierarchy is based on quoted prices in active markets for identical assets. The fair value of our plan assets categorized within level 2 on the fair value hierarchy is based on significant observable inputs for similar assets. The fair value of our plan assets categorized within level 3 on the fair value hierarchy is based on significant unobservable inputs. The following table sets forth the fair values of assets held by our international pension plans by level within the fair value hierarchy. Millions of dollars Level 1 Level 2 Level 3 Net Asset Value (a) Total Cash and equivalents $ — $ 136 $ — $ — $ 136 Equity funds (b) — 170 — — 170 Bond funds (c) — 319 — 149 468 Alternatives funds (d) — 4 — 163 167 Real estate funds (e) — 68 — 28 96 Other investments (f) 5 21 14 — 40 Fair value of plan assets at December 31, 2020 $ 5 $ 718 $ 14 $ 340 $ 1,077 Cash and equivalents $ — $ 151 $ — $ — $ 151 Equity funds (b) — 118 — — 118 Bond funds (c) — 292 — 99 391 Alternatives funds (d) — — — 197 197 Real estate funds (e) — 74 — 29 103 Other investments (f) 6 21 15 — 42 Fair value of plan assets at December 31, 2019 $ 6 $ 656 $ 15 $ 325 $ 1,002 (a) Represents investments measured at fair value using the Net Asset Value (NAV) per share practical expedient and thus has not been categorized in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the total value of our international pension plans assets. (b) Strategy of equity funds is to invest in diversified funds of global common stocks. (c) Strategy of bond funds is to invest in diversified funds of fixed income securities of varying geographies and credit quality. (d) Strategy of alternative funds is to invest in a fund of diversifying investments, including but not limited to reinsurance, commodities, and currencies. (e) Strategy of real estate funds is to invest in diversified funds of real estate investment trusts and private real estate. (f) Other investments primarily include investments in insurance contracts, balanced funds, and government bonds. Risk management practices for these plans include diversification by issuer, industry and geography, as well as the use of multiple asset classes and investment managers within each asset class. Our investment strategy for our United Kingdom pension plan, which constituted 81% of our international pension plans’ projected benefit obligation at December 31, 2020 and is no longer accruing service benefits, aims to achieve full funding of the benefit obligation, with the plan's assets increasingly composed of investments whose cash flows match the projected liabilities of the plan. Net periodic benefit cost Net periodic benefit cost for our international pension plans was $30 million in 2020, $23 million in 2019, and $32 million in 2018. Actuarial assumptions Certain weighted-average actuarial assumptions used to determine benefit obligations of our international pension plans at December 31 were as follows: 2020 2019 Discount rate 1.8% 2.5% Rate of compensation increase 5.9% 6.0% Certain weighted-average actuarial assumptions used to determine net periodic benefit cost of our international pension plans for the years ended December 31 were as follows: 2020 2019 2018 Discount rate 2.5% 3.3% 2.8% Expected long-term return on plan assets 3.5% 4.4% 4.1% Rate of compensation increase 6.0% 5.8% 5.5% Assumed long-term rates of return on plan assets, discount rates for estimating benefit obligations, and rates of compensation increases vary by plan according to local economic conditions. Where possible, discount rates were determined based on the prevailing market rates of a portfolio of high-quality debt instruments with maturities matching the expected timing of the payment of the benefit obligations. Expected long-term rates of return on plan assets were determined based upon an evaluation of our plan assets and historical trends and experience, taking into account current and expected market conditions. Other information Contributions. Funding requirements for each plan are determined based on the local laws of the country where such plan resides. In certain countries the funding requirements are mandatory, while in other countries they are discretionary. We currently expect to contribute $17 million to our international pension plans in 2021. Benefit payments. Expected benefit payments over the next 10 years for our international pension plans are as follows: $46 million in 2021, $44 million in 2022, $45 million in 2023, $45 million in 2024, $47 million in 2025, and an aggregate $266 million in years 2026 through 2030.

New Accounting Pronouncements (

New Accounting Pronouncements (Notes)	12 Months Ended
	Dec. 31, 2020
New Accounting Pronouncements [Abstract]
New Accounting Pronouncements

Description of Company and Si_2

Description of Company and Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Use of estimates	Use of estimates Our financial statements are prepared in conformity with United States generally accepted accounting principles, requiring us to make estimates and assumptions that affect: - the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements; and - the reported amounts of revenue and expenses during the reporting period. We believe the most significant estimates and assumptions are associated with the forecasting of our income tax (provision) benefit and the valuation of deferred taxes, legal reserves, long-lived asset valuations, and allowance for credit losses. Ultimate results could differ from our estimates.
Basis of presentation	Basis of presentation The consolidated financial statements include the accounts of our company and all of our subsidiaries that we control or variable interest entities for which we have determined that we are the primary beneficiary. All material intercompany accounts and transactions are eliminated. Investments in companies in which we do not have a controlling interest, but over which we do exercise significant influence, are accounted for using the equity method of accounting. If we do not have significant influence, we use the cost method of accounting. In addition, certain reclassifications of prior period balances have been made to conform to the current period presentation.
Revenue recognition	Revenue recognitionOur services and products are generally sold based upon purchase orders or contracts with our customers that include fixed or determinable prices but do not include right of return provisions or other significant post-delivery obligations. The vast majority of our service and product contracts are short-term in nature. We recognize revenue based on the transfer of control or our customers' ability to benefit from our services and products in an amount that reflects the consideration we expect to receive in exchange for those services and products. We also assess our customers' ability and intention to pay, which is based on a variety of factors, including our historical payment experience with, and the financial condition of our customers. Rates for services are typically priced on a per day, per meter, per man-hour, or similar basis.Revenue is recognized based on the transfer of control or our customers' ability to benefit from our services and products in an amount that reflects the consideration we expect to receive in exchange for those services and products. The vast majority of our service and product contracts are short-term in nature. In recognizing revenue for our services and products, we determine the transaction price of purchase orders or contracts with our customers, which may consist of fixed and variable consideration. We also assess our customers' ability and intention to pay, which is based on a variety of factors, including our historical payment experience with, and the financial condition of our customers. Payment terms and conditions vary by contract type, although terms generally include a requirement of payment within 20 to 60 days. Other judgments involved in recognizing revenue include an assessment of progress towards completion of performance obligations for certain long-term contracts, which involve estimating total costs to determine our progress towards contract completion, and calculating the corresponding amount of revenue to recognize.
Research and development	Research and development We maintain an active research and development program. The program improves products, processes, and engineering standards and practices that serve the changing needs of our customers, such as those related to high pressure and high temperature environments, and also develops new products and processes. Research and development costs are expensed as incurred and were $309 million in 2020, $404 million in 2019, and $390 million in 2018.
Cash equivalents	Cash equivalents We consider all highly liquid investments with an original maturity of three months or less to be cash equivalents.
Inventories	Inventories Inventories are stated at the lower of cost and net realizable value. Cost represents invoice or production cost for new items and original cost. Production cost includes material, labor, and manufacturing overhead. Our inventory is recorded on the weighted average cost method. We regularly review inventory quantities on hand and record provisions for excess or obsolete inventory based primarily on historical usage, estimated product demand, and technological developments.
Allowance for bad debts	Allowance for credit losses We establish an allowance for credit losses through a review of several factors, including historical collection experience, current aging status of the customer accounts, and current financial condition of our customers. Losses are charged against the allowance when the customer accounts are determined to be uncollectible.
Property, plant and equipment	Property, plant and equipment Other than those assets that have been written down to their fair values due to impairment, property, plant, and equipment are reported at cost less accumulated depreciation, which is generally provided on the straight-line method over the estimated useful lives of the assets. Accelerated depreciation methods are often used for tax purposes, when permitted. Upon sale or retirement of an asset, the related costs and accumulated depreciation are removed from the accounts and any gain or loss is recognized. Planned major maintenance costs are generally expensed as incurred. Expenditures for additions, modifications, and conversions are capitalized when they increase the value or extend the useful life of the asset.
Goodwill and other intangible assets	Goodwill and other intangible assets We record as goodwill the excess purchase price over the fair value of the tangible and identifiable intangible assets acquired in a business acquisition. Changes in the carrying amount of goodwill are detailed below by reportable segment. Millions of dollars Completion and Production Drilling and Evaluation Total Balance at December 31, 2018: $ 2,055 $ 770 $ 2,825 Current year acquisitions 6 5 11 Purchase price adjustments for previous acquisitions (1) (1) (2) Other (21) (1) (22) Balance at December 31, 2019: $ 2,039 $ 773 $ 2,812 Other (66) 58 (8) Balance at December 31, 2020: $ 1,973 $ 831 $ 2,804
Finite-lived intangible assets	We amortize other identifiable intangible assets with a finite life on a straight-line basis over the period which the asset is expected to contribute to our future cash flows, ranging from one year to twenty-eight years. The components of these other intangible assets generally consist of patents, license agreements, non-compete agreements, trademarks, and customer lists and contracts.
Impairment of long-lived assets	Evaluating impairment of long-lived assetsWhen events or changes in circumstances indicate that long-lived assets other than goodwill may be impaired, an evaluation is performed. For assets classified as held for use, we first group individual assets based on the lowest level for which identifiable cash flows are largely independent of the cash flows from other assets. We then compare estimated future undiscounted cash flows expected to result from the use and eventual disposition of the asset group to its carrying amount. If the asset group's undiscounted cash flows are less than its carrying amount, we then determine the asset group's fair value by using a discounted cash flow analysis and recognize any resulting impairment. When an asset is classified as held for sale, the asset’s book value is evaluated and adjusted to the lower of its carrying amount or fair value less cost to sell. In addition, depreciation and amortization is ceased while it is classified as held for sale.
Income taxes	Income taxes We recognize the amount of taxes payable or refundable for the year. In addition, deferred tax assets and liabilities are recognized for the expected future tax consequences of events that have been recognized in the financial statements or tax returns. A valuation allowance is provided for deferred tax assets if it is more likely than not that these items will not be realized. In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Management considers the scheduled reversal of deferred tax liabilities, projected future taxable income, and tax planning strategies in making this assessment. Based upon the level of historical taxable income and projections for future taxable income over the periods in which the deferred tax assets are deductible, management believes it is more likely than not that we will realize the benefits of these deductible differences, net of the existing valuation allowances. We recognize interest and penalties related to unrecognized tax benefits within the provision for income taxes on continuing operations in our consolidated statements of operations.
Derivative instruments	Derivative instruments At times, we enter into derivative financial transactions to hedge existing or projected exposures to changing foreign currency exchange rates and interest rates. We do not enter into derivative transactions for speculative or trading purposes. We recognize all derivatives on the balance sheet at fair value. Derivatives that are not hedges are adjusted to fair value and reflected through the results of operations. If the derivative is designated as a hedge, depending on the nature of the hedge, changes in the fair value of derivatives are either offset against: - the change in fair value of the hedged assets, liabilities or firm commitments through earnings; or - recognized in other comprehensive income until the hedged item is recognized in earnings. The ineffective portion of a derivative’s change in fair value is recognized in earnings. Recognized gains or losses on derivatives entered into to manage foreign currency exchange risk are included in “Other, net” on the consolidated statements of operations. Gains or losses on interest rate derivatives are included in “Interest expense, net.”
Foreign currency translations	Foreign currency translation Foreign entities whose functional currency is the United States dollar translate monetary assets and liabilities at year-end exchange rates, and nonmonetary items are translated at historical rates. Revenue and expense transactions are translated at the average rates in effect during the year, except for those expenses associated with nonmonetary balance sheet accounts, which are translated at historical rates. Gains or losses from remeasurement of monetary assets and liabilities due to changes in exchange rates are recognized in our consolidated statements of operations in “Other, net” in the year of occurrence.
Stock-based compensation	Stock-based compensationStock-based compensation cost is measured at the date of grant, based on the calculated fair value of the award and is recognized as expense over the employee’s service period, which is generally the vesting period of the equity grant. Additionally, compensation cost is recognized based on awards ultimately expected to vest, therefore, we have reduced the cost for estimated forfeitures based on historical forfeiture rates. Forfeitures are estimated at the time of grant and revised in subsequent periods to reflect actual forfeitures.

Revenue (Policies)

Revenue (Policies)	12 Months Ended
	Dec. 31, 2020
Revenue [Abstract]
Revenue recognition	Revenue recognitionOur services and products are generally sold based upon purchase orders or contracts with our customers that include fixed or determinable prices but do not include right of return provisions or other significant post-delivery obligations. The vast majority of our service and product contracts are short-term in nature. We recognize revenue based on the transfer of control or our customers' ability to benefit from our services and products in an amount that reflects the consideration we expect to receive in exchange for those services and products. We also assess our customers' ability and intention to pay, which is based on a variety of factors, including our historical payment experience with, and the financial condition of our customers. Rates for services are typically priced on a per day, per meter, per man-hour, or similar basis.Revenue is recognized based on the transfer of control or our customers' ability to benefit from our services and products in an amount that reflects the consideration we expect to receive in exchange for those services and products. The vast majority of our service and product contracts are short-term in nature. In recognizing revenue for our services and products, we determine the transaction price of purchase orders or contracts with our customers, which may consist of fixed and variable consideration. We also assess our customers' ability and intention to pay, which is based on a variety of factors, including our historical payment experience with, and the financial condition of our customers. Payment terms and conditions vary by contract type, although terms generally include a requirement of payment within 20 to 60 days. Other judgments involved in recognizing revenue include an assessment of progress towards completion of performance obligations for certain long-term contracts, which involve estimating total costs to determine our progress towards contract completion, and calculating the corresponding amount of revenue to recognize.

Description of Company and Si_3

Description of Company and Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Goodwill	Changes in the carrying amount of goodwill are detailed below by reportable segment. Millions of dollars Completion and Production Drilling and Evaluation Total Balance at December 31, 2018: $ 2,055 $ 770 $ 2,825 Current year acquisitions 6 5 11 Purchase price adjustments for previous acquisitions (1) (1) (2) Other (21) (1) (22) Balance at December 31, 2019: $ 2,039 $ 773 $ 2,812 Other (66) 58 (8) Balance at December 31, 2020: $ 1,973 $ 831 $ 2,804

Impairment and Other Charges (T

Impairment and Other Charges (Tables)	12 Months Ended
	Dec. 31, 2020
Impairments and Other Charges [Abstract]
Restructuring and Related Costs	The following table presents various pre-tax charges we recorded during the years ended December 31, 2020, 2019, and 2018 which are reflected within "Impairments and other charges" on our consolidated statements of operations. Year Ended December 31 Millions of dollars 2020 2019 2018 Long-lived asset impairments $ 2,629 $ 1,603 $ — Inventory costs and write-downs 505 458 — Severance 384 172 — Joint ventures — 154 — Venezuela investment write-down — — 265 Other 281 119 — Total impairments and other charges $ 3,799 $ 2,506 $ 265

Business Segment and Geograph_2

Business Segment and Geographic Information (Tables)	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Reconciliation of assets from segment to consolidated	December 31 Millions of dollars 2020 2019 Total assets: Completion and Production (a) $ 7,924 $ 11,894 Drilling and Evaluation (a) 6,371 8,059 Corporate and other (b) 6,385 5,424 Total $ 20,680 $ 25,377 (a) Assets associated with specific segments primarily include receivables, inventories, property, plant, and equipment, operating lease right-of-use assets, equity in and advances to related companies, and goodwill. (b) Corporate and other primarily include cash and equivalents and deferred tax assets.
Schedule of revenue from external customers and long-lived assets, by geographical areas	Year Ended December 31 Millions of dollars 2020 2019 2018 Revenue: North America $ 5,731 $ 11,884 $ 14,431 Latin America 1,668 2,364 2,065 Europe/Africa/CIS 2,813 3,285 2,945 Middle East/Asia 4,233 4,875 4,554 Total $ 14,445 $ 22,408 $ 23,995 December 31 Millions of dollars 2020 2019 Net property, plant and equipment: North America $ 2,211 $ 4,666 Latin America 544 754 Europe/Africa/CIS 602 772 Middle East/Asia 968 1,118 Total $ 4,325 $ 7,310

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Dec. 31, 2020
Revenue [Abstract]
Disaggregation of Revenue	The following table presents information on our disaggregated revenue. Year Ended December 31 Millions of dollars 2020 2019 2018 Revenue by segment: Completion and Production $ 7,839 $ 14,031 $ 15,973 Drilling and Evaluation 6,606 8,377 8,022 Total revenue $ 14,445 $ 22,408 $ 23,995 Revenue by geographic region: North America $ 5,731 $ 11,884 $ 14,431 Latin America 1,668 2,364 2,065 Europe/Africa/CIS 2,813 3,285 2,945 Middle East/Asia 4,233 4,875 4,554 Total revenue $ 14,445 $ 22,408 $ 23,995

Receivables (Tables)

Receivables (Tables)	12 Months Ended
	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Rollforward of Allowance for Bad Debts	The table below presents a rollforward of our global allowance for credit losses for 2018, 2019 and 2020. Millions of dollars Balance at Beginning of Period Provision (a) Balance at End of Period (c) Year ended December 31, 2018 $ 725 $ 57 $ (44) $ 738 Year ended December 31, 2019 738 50 (12) 776 Year ended December 31, 2020 776 58 (10) 824 (a) Represents increases to allowance for credit losses charged to costs and expenses, net of recoveries. (b) Includes write-offs, balance sheet reclassifications, and other activity. (c) The allowance for credit losses in all years is primarily comprised of a full reserve against accounts receivable with our primary customer in Venezuela.

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Lease, Cost	The following tables illustrate the financial impact of our leases as of and for the years ended December 31, 2020 and December 31, 2019, along with other supplemental information about our existing leases: Year Ended December 31 Millions of dollars 2020 2019 Components of lease expense: Finance lease cost: Amortization of right-of-use assets $ 19 $ 19 Interest on lease liabilities 32 51 Operating lease cost 296 355 Short-term lease cost 31 110 Sublease income (4) (5) Total lease cost $ 374 $ 530
Lease supplemental disclosure	As of December 31 Millions of dollars 2020 2019 Components of balance sheet: Operating leases: Operating lease right-of-use assets (non-current) $ 786 $ 931 Current portion of operating lease liabilities 251 208 Operating lease liabilities (non-current) 758 825 Finance leases: Other assets (non-current) $ 113 $ 123 Other current liabilities 24 19 Other liabilities (non-current) 118 124 During the years ended December 31, 2020 and December 31, 2019, impairment charges were recorded related to operating and finance lease right-of-use assets totaling $191 million and $139 million, respectively. See Note 2 to the consolidated financial statements for further discussion on impairments and other charges. Year Ended December 31 Millions of dollars except years and percentages 2020 2019 Other supplemental information: Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 299 $ 316 Operating cash flows from finance leases 32 51 Financing cash flows from finance leases 21 24 Right-of-use assets obtained in exchange for lease obligations: Operating leases (a) $ 447 $ 1,362 Finance leases 39 74 Weighted-average remaining lease term: Operating leases 8.6 years 9.5 years Finance leases 6.4 years 5.4 years Weighted-average discount rate for operating leases 4.1 % 4.4 %
Lessee, Operating and Finance Leases, Liability Maturity Table	The following table summarizes the maturity of our operating and finance leases as of December 31, 2020: Millions of dollars Operating Leases Finance Leases 2021 $ 287 $ 63 2022 233 63 2023 146 62 2024 94 49 2025 70 38 Thereafter 428 55 Total lease payments 1,258 330 Less imputed interest (249) (188) Total $ 1,009 $ 142

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2020
Inventory Disclosure [Abstract]
Inventories	Inventories consisted of the following: December 31 Millions of dollars 2020 2019 Finished products and parts $ 1,330 $ 1,865 Raw materials and supplies 952 1,147 Work in process 67 127 Total $ 2,349 $ 3,139

Property, Plant, and Equipment

Property, Plant, and Equipment (Tables)	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Property, plant, and equipment	Property, plant, and equipment were composed of the following: December 31 Millions of dollars 2020 2019 Land $ 120 $ 202 Buildings and property improvements 1,652 3,167 Machinery, equipment, and other 13,592 16,571 Total 15,364 19,940 Less accumulated depreciation 11,039 12,630 Net property, plant, and equipment $ 4,325 $ 7,310
Percentages of building and property improvements, and total machinery, and equipment and other, excluding oil and natural gas investments, depreciated over useful lives	Classes of assets are depreciated over the following useful lives: Buildings and Property 2020 2019 1 - 10 years 13% 12% 11 - 20 years 41% 41% 21 - 30 years 21% 22% 31 - 40 years 25% 25% Machinery, Equipment, 2020 2019 1 - 5 years 49% 43% 6 - 10 years 41% 47% 11 - 20 years 10% 10%

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Schedule of debt	Our total debt, including short-term borrowings and current maturities of long-term debt, consisted of the following: December 31 Millions of dollars 2020 2019 5.0% senior notes due November 2045 $ 2,000 $ 2,000 3.8% senior notes due November 2025 1,000 2,000 4.85% senior notes due November 2035 1,000 1,000 7.45% senior notes due September 2039 1,000 1,000 2.92% senior notes due March 2030 1,000 — 4.75% senior notes due August 2043 900 900 6.7% senior notes due September 2038 800 800 3.5% senior notes due August 2023 600 1,100 4.5% senior notes due November 2041 500 500 3.25% senior notes due November 2021 500 500 7.6% senior debentures due August 2096 300 300 8.75% senior debentures due February 2021 185 185 6.75% notes due February 2027 104 104 Other 20 28 Unamortized debt issuance costs and discounts (82) (90) Total 9,827 10,327 Short-term borrowings and current maturities of long-term debt (695) (11) Total long-term debt $ 9,132 $ 10,316

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Components of the (provision)/benefit for income taxes on continuing operations	The components of the (provision) benefit for income taxes on continuing operations were: Year Ended December 31 Millions of dollars 2020 2019 2018 Current income taxes: Federal $ 1 $ 32 $ 19 Foreign (167) (426) (428) State — (9) (15) Total current (166) (403) (424) Deferred income taxes: Federal 372 383 286 Foreign 2 (36) 9 State 70 49 (28) Total deferred 444 396 267 Income tax (provision) benefit $ 278 $ (7) $ (157)
United States and foreign components of income from continuing operations before income taxes	The United States and foreign components of income (loss) from continuing operations before income taxes were as follows: Year Ended December 31 Millions of dollars 2020 2019 2018 United States $ (3,031) $ (1,517) $ 1,097 Foreign (189) 395 717 Total $ (3,220) $ (1,122) $ 1,814
Reconciliations between the actual provision for income taxes on continuing operations and that computed by applying the US statutory rate to income from continuing operations before income taxes	Reconciliations between the actual (provision) benefit for income taxes on continuing operations and that computed by applying the United States statutory rate to income (loss) from continuing operations before income taxes were as follows: Year Ended December 31 2020 2019 2018 United States statutory rate 21.0 % 21.0 % 21.0 % Impact of impairments and other charges (12.3) (20.9) — Impact of foreign income taxed at different rates (1.1) 0.8 (3.0) Valuation allowance against tax assets 0.9 (10.7) (16.2) Adjustments of prior year taxes 0.7 13.0 2.0 State income taxes — (1.3) 1.9 Venezuela adjustment — — 5.7 Impact of U.S. tax reform — — (2.6) Other items, net (0.6) (2.5) (0.1) Total effective tax rate on continuing operations 8.6 % (0.6) % 8.7 %
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	The primary components of our deferred tax assets and liabilities were as follows: December 31 Millions of dollars 2020 2019 Gross deferred tax assets: Net operating loss carryforwards $ 1,691 $ 1,301 Foreign tax credit carryforwards 945 877 Research and development tax credit carryforwards 196 198 Employee compensation and benefits 237 215 Accrued liabilities 263 316 Other 469 382 Total gross deferred tax assets 3,801 3,289 Gross deferred tax liabilities: Depreciation and amortization 7 373 Operating lease right-of-use assets 86 109 Other 155 58 Total gross deferred tax liabilities 248 540 Valuation allowances 1,394 1,082 Net deferred income tax asset $ 2,159 $ 1,667
Rollforward of unrecognized tax benefits and associated interest and penalties	The following table presents a rollforward of our unrecognized tax benefits and associated interest and penalties. Millions of dollars Unrecognized Tax Benefits Interest Balance at January 1, 2018 $ 333 $ 60 Change in prior year tax positions 32 11 Change in current year tax positions 63 — Cash settlements with taxing authorities (7) (2) Lapse of statute of limitations (4) (2) Balance at December 31, 2018 $ 417 $ 67 Change in prior year tax positions 25 11 Change in current year tax positions 29 — Cash settlements with taxing authorities (4) — Lapse of statute of limitations (42) (8) Balance at December 31, 2019 $ 425 (a) $ 70 Change in prior year tax positions (66) 6 Change in current year tax positions 16 — Cash settlements with taxing authorities (3) — Lapse of statute of limitations (17) (5) Balance at December 31, 2020 $ 355 (a)(b) $ 71 (a) Includes $18 million as of December 31, 2020 and $25 million as of December 31, 2019 in foreign unrecognized tax benefits that would give rise to a United States tax credit. As of December 31, 2020 and December 31, 2019, a net $224 million and $271 million without a net operating loss carryforward offset, respectively, of unrecognized tax benefits would positively impact the effective tax rate and be recognized as additional tax benefits in our statement of operations if resolved in our favor. (b) Includes $17 million that could be resolved within the next 12 months.
Summary of Tax Credit Carryforwards	Our deferred tax assets from net operating losses, foreign tax credits, and research and development credits will expire as follows: Millions of dollars U.S. Net Operating Loss Foreign Net Operating Loss Foreign Tax Credits Research and Development Credit Total 2021-2025 $ 2 $ 186 $ 533 $ — $ 721 2026-2030 7 125 557 — 689 2031-2041 665 92 — 196 953 Non-Expiring 312 435 — — 747 $ 986 $ 838 $ 1,090 $ 196 $ 3,110

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2020
Stockholders' Equity Note [Abstract]
Schedule of shares of common stock	The following table summarizes total shares of common stock outstanding: December 31 Millions of shares 2020 2019 Issued 1,066 1,068 In treasury (181) (190) Total shares of common stock outstanding 885 878
Schedule of accumulated other comprehensive income (loss)	Accumulated other comprehensive loss consisted of the following: December 31 Millions of dollars 2020 2019 Defined benefit and other postretirement liability adjustments (a) $ (226) $ (214) Cumulative translation adjustment (83) (82) Other (53) (66) Total accumulated other comprehensive loss $ (362) $ (362) (a) Included net actuarial losses for our international pension plans of $212 million at December 31, 2020 and $189 million at December 31, 2019.

Stock-based Compensation (Table

Stock-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Payment Arrangement, Cost by Plan	The following table summarizes stock-based compensation costs for the years ended December 31, 2020, 2019 and 2018. Year Ended December 31 Millions of dollars 2020 2019 2018 Stock-based compensation cost $ 218 $ 257 $ 274 Tax benefit (35) (48) (51) Stock-based compensation cost, net of tax $ 183 $ 209 $ 223
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Payment Arrangement, Option, Activity	The following table represents our stock options activity during 2020. Number Weighted Weighted Aggregate Outstanding at January 1, 2020 25.3 $ 41.58 Granted 2.2 24.59 Forfeited/expired (1.6) 37.87 Outstanding at December 31, 2020 25.9 $ 40.36 5.4 $ — Exercisable at December 31, 2020 19.7 $ 44.29 4.5 $ —
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The assumptions and resulting fair values of options granted were as follows: Year Ended December 31 2020 2019 2018 Expected term (in years) 5.39 5.31 5.27 Expected volatility 33% 31% 28% Expected dividend yield 2.92 - 3.23% 2.25 - 3.88% 1.37 - 2.29% Risk-free interest rate 1.43 - 1.69% 1.35 - 2.51% 2.27 - 2.84% Weighted average grant-date fair value of option $5.41 $5.91 $11.56
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The following table represents our restricted stock awards and restricted stock units granted, vested, and forfeited during 2020. Number of Shares Weighted Average Nonvested shares at January 1, 2020 18.1 $ 34.72 Granted 8.2 16.53 Vested (5.4) 36.97 Forfeited (1.9) 33.66 Nonvested shares at December 31, 2020 19.0 $ 26.26
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The assumptions and resulting fair values were as follows: Year Ended December 31 2020 2019 2018 Expected volatility 68 % 34 % 25 % Expected dividend yield 4.89 % 3.06 % 1.62 % Risk-free interest rate 0.65 % 2.20 % 1.92 % Weighted average grant-date fair value per share $ 3.18 $ 5.22 $ 8.86

Income per Share Income per Sha

Income per Share Income per Share (Tables)	12 Months Ended
	Dec. 31, 2020
Weighted average shares outstanding and antidilutive shares [Line Items]
Weighted average shares outstanding and antidilutive shares	A reconciliation of the number of shares used for the basic and diluted income per share computations is as follows: Year Ended December 31 Millions of shares 2020 2019 2018 Basic weighted average common shares outstanding 881 875 875 Dilutive effect of awards granted under our stock incentive plans — — 2 Diluted weighted average common shares outstanding 881 875 877 Antidilutive shares: Options with exercise price greater than the average market price 27 24 14 Options which are antidilutive due to net loss position 1 1 — Total antidilutive shares 28 25 14

Financial Instruments and Ris_2

Financial Instruments and Risk Management (Tables)	12 Months Ended
	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments	The carrying amount and fair value of our total debt, including short-term borrowings and current maturities of long term debt, is as follows: December 31, 2020 December 31, 2019 Millions of dollars Level 1 Level 2 Total fair value Carrying value Level 1 Level 2 Total fair value Carrying value Total debt $ 10,856 $ 700 $ 11,556 $ 9,827 $ 11,093 $ 868 $ 11,961 $ 10,327

Retirement Plans (Tables)

Retirement Plans (Tables)	12 Months Ended
	Dec. 31, 2020
Retirement Benefits [Abstract]
Schedule of Net Benefit Costs	The following table presents additional information about our international pension plans. December 31 Millions of dollars 2020 2019 Amounts recognized on the Consolidated Balance Sheets Other Assets $ 45 $ 85 Accrued employee compensation and benefits 8 7 Employee compensation and benefits 189 189 Pension plans in which projected benefit obligation exceeded plan assets Projected benefit obligation $ 228 $ 214 Fair value of plan assets 31 18 Pension plans in which accumulated benefit obligation exceeded plan assets Accumulated benefit obligation $ 126 $ 121 Fair value of plan assets 25 18
Schedule of Allocation of Plan Assets	The following table sets forth the fair values of assets held by our international pension plans by level within the fair value hierarchy. Millions of dollars Level 1 Level 2 Level 3 Net Asset Value (a) Total Cash and equivalents $ — $ 136 $ — $ — $ 136 Equity funds (b) — 170 — — 170 Bond funds (c) — 319 — 149 468 Alternatives funds (d) — 4 — 163 167 Real estate funds (e) — 68 — 28 96 Other investments (f) 5 21 14 — 40 Fair value of plan assets at December 31, 2020 $ 5 $ 718 $ 14 $ 340 $ 1,077 Cash and equivalents $ — $ 151 $ — $ — $ 151 Equity funds (b) — 118 — — 118 Bond funds (c) — 292 — 99 391 Alternatives funds (d) — — — 197 197 Real estate funds (e) — 74 — 29 103 Other investments (f) 6 21 15 — 42 Fair value of plan assets at December 31, 2019 $ 6 $ 656 $ 15 $ 325 $ 1,002 (a) Represents investments measured at fair value using the Net Asset Value (NAV) per share practical expedient and thus has not been categorized in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the total value of our international pension plans assets. (b) Strategy of equity funds is to invest in diversified funds of global common stocks. (c) Strategy of bond funds is to invest in diversified funds of fixed income securities of varying geographies and credit quality. (d) Strategy of alternative funds is to invest in a fund of diversifying investments, including but not limited to reinsurance, commodities, and currencies. (e) Strategy of real estate funds is to invest in diversified funds of real estate investment trusts and private real estate. (f) Other investments primarily include investments in insurance contracts, balanced funds, and government bonds.
Defined Benefit Plan, Assumptions	Certain weighted-average actuarial assumptions used to determine benefit obligations of our international pension plans at December 31 were as follows: 2020 2019 Discount rate 1.8% 2.5% Rate of compensation increase 5.9% 6.0% Certain weighted-average actuarial assumptions used to determine net periodic benefit cost of our international pension plans for the years ended December 31 were as follows: 2020 2019 2018 Discount rate 2.5% 3.3% 2.8% Expected long-term return on plan assets 3.5% 4.4% 4.1% Rate of compensation increase 6.0% 5.8% 5.5%

Description of Company and Si_4

Description of Company and Significant Accounting Policies (Details)	3 Months Ended			12 Months Ended
	Sep. 30, 2020USD ($)	Jun. 30, 2020USD ($)	Mar. 31, 2020USD ($)	Dec. 31, 2020USD ($)Division	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of business segments | Division				2
Goodwill [Line Items]
Goodwill, Impairment Loss	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0
Research and Development [Abstract]
Research and development costs				$ 309,000,000	404,000,000	390,000,000
Cash and Cash Equivalents [Abstract]
Cash equivalents, maximum maturity (in months)				3 months
Goodwill [Roll Forward]
Goodwill			2,812,000,000	$ 2,812,000,000	2,825,000,000
Current year acquisitions					11,000,000
Purchase price adjustments for previous acquisitions					(2,000,000)
Other				(8,000,000)	(22,000,000)
Goodwill				$ 2,804,000,000	2,812,000,000	2,825,000,000
Minimum
Finite-lived intangible assets [Abstract]
Useful life of finite-lived intangible assets (in years)				1 year
Maximum
Finite-lived intangible assets [Abstract]
Useful life of finite-lived intangible assets (in years)				28 years
Completion and Production
Goodwill [Roll Forward]
Goodwill			2,039,000,000	$ 2,039,000,000	2,055,000,000
Current year acquisitions					6,000,000
Purchase price adjustments for previous acquisitions					(1,000,000)
Other				(66,000,000)	(21,000,000)
Goodwill				1,973,000,000	2,039,000,000	2,055,000,000
Drilling and Evaluation
Goodwill [Roll Forward]
Goodwill			$ 773,000,000	773,000,000	770,000,000
Current year acquisitions					5,000,000
Purchase price adjustments for previous acquisitions					(1,000,000)
Other				58,000,000	(1,000,000)
Goodwill				$ 831,000,000	$ 773,000,000	$ 770,000,000

Impairment and Other Charges (D

Impairment and Other Charges (Details) - USD ($)		3 Months Ended		12 Months Ended
		Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Long-lived asset impairments				$ 2,629,000,000	$ 1,603,000,000	$ 0
Inventory costs and write-downs				505,000,000	458,000,000	0
Severance				384,000,000	172,000,000	0
Joint ventures				0	154,000,000	0
Other				281,000,000	119,000,000	0
Total impairments and other charges	[1]			$ 3,799,000,000	2,506,000,000	265,000,000
Decline in WTI oil spot price		25.00%		31.00%
Impairment of real estate properties				$ 616,000,000
Impairment of drilling-services equipment				297,000,000
Impairment of hydraulic fracturing equipment				1,000,000,000	759,000,000
Impairment of real estate facilities					215,000,000
Impairment of legacy drilling equipment					243,000,000
Impairment of intangible assets				131,000,000	98,000,000
Impairment of right-of-use assets associated with operating leases				191,000,000	139,000,000
Impairment of other fixed assets				$ 394,000,000	148,000,000
Decline in US average rig count				54.00%
Decline in International average rig count				25.00%
Decline in global rig count				38.00%
Impairments and other charges				$ 3,799,000,000	2,506,000,000	265,000,000
Impairment of hydraulic fracturing equipment				1,000,000,000	759,000,000
Impairment of legacy drilling equipment					243,000,000
Impairment of real estate facilities					215,000,000
Impairment of right-of-use assets associated with operating leases				191,000,000	139,000,000
Impairment of intangible assets				131,000,000	98,000,000
Impairment of other fixed assets				394,000,000	148,000,000
Arithmetic Average [Member]
Restructuring Cost and Reserve [Line Items]
WTI oil spot price		$ 43		39
Maximum
Restructuring Cost and Reserve [Line Items]
WTI oil spot price			$ 63
Minimum
Restructuring Cost and Reserve [Line Items]
WTI oil spot price		$ 48	$ 21
Completion and Production
Restructuring Cost and Reserve [Line Items]
Total impairments and other charges				2,400,000,000	1,600,000,000
Drilling and Evaluation
Restructuring Cost and Reserve [Line Items]
Total impairments and other charges				1,400,000,000	849,000,000
VENEZUELA
Restructuring Cost and Reserve [Line Items]
Venezuela investment write-down				$ 0	$ 0	265,000,000
Total impairments and other charges	[1]					$ 265,000,000
UNITED STATES | Revenue Benchmark [Member]
Restructuring Cost and Reserve [Line Items]
Concentration Risk, Percentage				38.00%	51.00%	58.00%
[1]	Impairments and other charges are as follows: -For the year ended December 31, 2020, amount includes approximately $2.4 billion attributable to Completion and Production, $1.4 billion attributable to Drilling and Evaluation, and $62 million attributable to Corporate and other. -For the year ended December 31, 2019, amount includes approximately $1.6 billion attributable to Completion and Production, $849 million attributable to Drilling and Evaluation, and $56 million attributable to Corporate and other. -For the years ended December 31, 2018, we recorded aggregate charges of $265 million to write-down our investment in Venezuela.

Business Segment and Geograph_3

Business Segment and Geographic Information (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)DivisionCountries	Dec. 31, 2019USD ($)Countries	Dec. 31, 2018Countries
Segment Reporting Information [Line Items]
Number of business segments | Division	2
Maximum Percentage Revenue from One Geographic Segment	10.00%	10.00%	10.00%
Maximum Percentage Property Plant and Equipment from One Geographic Segment	10.00%	10.00%
Number of Countries Exceed Revenue Threshold | Countries	1	1	1
Number of Countries Exceed Property Plant and Equipment Threshold | Countries	1	1
Long-term debt | $	$ 9,132	$ 10,316
Senior notes due March 2030
Segment Reporting Information [Line Items]
Long-term debt | $	$ 1,000	$ 0
Property, Plant and Equipment [Member] | UNITED STATES
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	49.00%	59.00%
Revenue Benchmark [Member] | UNITED STATES
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	38.00%	51.00%	58.00%

Business Segment and Geograph_4

Business Segment and Geographic Information (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue:
Revenue		$ 14,445	$ 22,408	$ 23,995
Operating income:
Total operating income (loss)		(2,436)	(448)	2,467
Impairments and other charges		3,799	2,506	265
Impairments and other charges	[1]	(3,799)	(2,506)	(265)
Interest expense, net of interest income		(505)	(569)	(554)
Other, net		(111)	(105)	(99)
Income (loss) before income taxes		(3,220)	(1,122)	1,814
Capital expenditures:
Total capital expenditures		728	1,530	2,026
Depreciation, depletion and amortization:
Total depreciation, depletion and amortization		1,058	1,625	1,606
Total assets:
Total assets		20,680	25,377
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net		4,325	7,310
Gain (Loss) on Extinguishment of Debt		(168)	0	0
Completion and Production
Revenue:
Revenue		7,839	14,031	15,973
Operating income:
Total operating income (loss)		995	1,671	2,278
Impairments and other charges		(2,400)	(1,600)
Capital expenditures:
Total capital expenditures		314	800	1,364
Depreciation, depletion and amortization:
Total depreciation, depletion and amortization		615	1,049	1,058
Total assets:
Total assets	[2]	7,924	11,894
Drilling and Evaluation
Revenue:
Revenue		6,606	8,377	8,022
Operating income:
Total operating income (loss)		569	642	745
Impairments and other charges		(1,400)	(849)
Capital expenditures:
Total capital expenditures		410	728	657
Depreciation, depletion and amortization:
Total depreciation, depletion and amortization		430	552	512
Total assets:
Total assets	[2]	6,371	8,059
Corporate and shared assets
Total assets:
Total assets	[3]	6,385	5,424
Total operations
Operating income:
Total operating income (loss)		1,564	2,313	3,023
Corporate and other
Operating income:
Total operating income (loss)	[4]	(201)	(255)	(291)
Impairments and other charges		(56)
Capital expenditures:
Total capital expenditures		4	2	5
Depreciation, depletion and amortization:
Total depreciation, depletion and amortization		13	$ 24	36
Corporate and Other [Member]
Operating income:
Impairments and other charges		$ (62)
VENEZUELA
Operating income:
Impairments and other charges	[1]			(265)
UNITED STATES | Property, Plant and Equipment [Member]
Property, Plant and Equipment [Abstract]
Concentration Risk, Percentage		49.00%	59.00%
North America [Member]
Revenue:
Revenue		$ 5,731	$ 11,884	14,431
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net		2,211	4,666
Latin America [Member]
Revenue:
Revenue		1,668	2,364	2,065
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net		544	754
Europe/Africa/CIS [Member]
Revenue:
Revenue		2,813	3,285	2,945
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net		602	772
Middle East/Asia [Member]
Revenue:
Revenue		4,233	4,875	$ 4,554
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net		$ 968	$ 1,118
[1]	Impairments and other charges are as follows: -For the year ended December 31, 2020, amount includes approximately $2.4 billion attributable to Completion and Production, $1.4 billion attributable to Drilling and Evaluation, and $62 million attributable to Corporate and other. -For the year ended December 31, 2019, amount includes approximately $1.6 billion attributable to Completion and Production, $849 million attributable to Drilling and Evaluation, and $56 million attributable to Corporate and other. -For the years ended December 31, 2018, we recorded aggregate charges of $265 million to write-down our investment in Venezuela.
[2]	Assets associated with specific segments primarily include receivables, inventories, property, plant, and equipment, operating lease right-of-use assets, equity in and advances to related companies, and goodwill.
[3]	Corporate and other primarily include cash and equivalents and deferred tax assets.
[4]	Includes certain expenses not attributable to a business segment, such as costs related to support functions and corporate executives, operating lease assets, and also includes amortization expense associated with intangible assets recorded as a result of acquisitions.

Revenue (Details)

Revenue (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)DivisionCountries	Dec. 31, 2019USD ($)Countries	Dec. 31, 2018USD ($)Countries
Disaggregation of Revenue [Line Items]
Number of business segments | Division	2
Maximum Percentage Revenue from One Geographic Segment	10.00%	10.00%	10.00%
Number of Countries Exceed Revenue Threshold | Countries	1	1	1
Revenue, Performance Obligation, Description of Timing	one year
Revenue	$ 14,445	$ 22,408	$ 23,995
North America [Member]
Disaggregation of Revenue [Line Items]
Revenue	5,731	11,884	14,431
Latin America [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,668	2,364	2,065
Europe/Africa/CIS [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,813	3,285	2,945
Middle East/Asia [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 4,233	4,875	4,554
Minimum
Disaggregation of Revenue [Line Items]
Revenue, Performance Obligation, Description of Payment Terms	20
Maximum
Disaggregation of Revenue [Line Items]
Revenue, Performance Obligation, Description of Payment Terms	60 days
Completion and Production
Disaggregation of Revenue [Line Items]
Revenue	$ 7,839	14,031	15,973
Drilling and Evaluation
Disaggregation of Revenue [Line Items]
Revenue	$ 6,606	$ 8,377	$ 8,022
Revenue Benchmark [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Concentration Risk, Percentage	38.00%	51.00%	58.00%

Receivables (Details)

Receivables (Details) $ in Millions		12 Months Ended
		Dec. 31, 2020USD ($)CountriesCustomers		Dec. 31, 2019USD ($)CustomersCountries		Dec. 31, 2018USD ($)
Concentration Risk [Line Items]
Maximum Percentage Gross Trade Receivables From One Geographic Segment		10.00%		10.00%
Maximum Percentage Gross Trade Receivables From One Customer		10.00%		10.00%
NumberOfCountriesExceedReceivablesThreshold | Countries		1		1
NumberOfCustomersExceedReceivablesThreshold | Customers		0		0
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period		$ 776	[1]	$ 738	[1]	$ 725
Provision (a)	[2]	58		50		57
Other (b)	[3]	(10)		(12)		(44)
Balance at End of Period (c)	[1]	$ 824		$ 776		$ 738
UNITED STATES | Geographic Concentration Risk | Accounts Receivable
Concentration Risk [Line Items]
Concentration Risk, Percentage		32.00%		36.00%
[1]	The allowance for credit losses in all years is primarily comprised of a full reserve against accounts receivable with our primary customer in Venezuela.
[2]	Represents increases to allowance for credit losses charged to costs and expenses, net of recoveries.
[3]	Includes write-offs, balance sheet reclassifications, and other activity.

Leases (Details)

Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Lessee, Operating Lease, Term of Contract	10 years
Impairment of right-of-use assets associated with operating leases	$ 191	$ 139

Leases Components of lease expe

Leases Components of lease expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Finance lease cost - Amortization of right-of-use assets	$ 19	$ 19
Finance lease cost - Interest on lease liabilities	32	51
Operating lease cost	296	355
Short-term lease cost	31	110
Sublease income	(4)	(5)
Total lease cost	$ 374	$ 530
Operating Leases, Rent Expense, Net			$ 680

Leases Components of balance sh

Leases Components of balance sheet (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Impairment of right-of-use assets associated with operating leases	$ 191	$ 139
Operating lease right-of-use assets (non-current)	786	931
Current portion of operating lease liabliities	251	208
Operating lease liabilities (non-current)	758	825
Other assets
Finance leases - Other assets (non-current)	113	123
Other current liabilities
Finance leases - Other current liabilities	24	19
Other liabilities
Finance leases - Other liabilities (non-current)	$ 118	$ 124

Leases Other supplemental infor

Leases Other supplemental information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020		Dec. 31, 2019
Leases [Abstract]
Operating cash flows from operating leases	$ 299		$ 316
Operating cash flows from finance leases	32		51
Financing cash flows from finance leases	21		24
Right-of-Use Assets Obtained in Exchange for Operating Lease Liability	447	[1]	1,362
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 39		$ 74
Operating Lease, Weighted Average Remaining Lease Term	8 years 7 months 6 days		9 years 6 months
Finance Lease, Weighted Average Remaining Lease Term	6 years 4 months 24 days		5 years 4 months 24 days
Operating Lease, Weighted Average Discount Rate, Percent	4.10%		4.40%
[1]	rimarily consists of operating lease right-of-use assets exchanged for lease obligations upon implementation of the new lease accounting standard on January 1, 2019.

Leases Maturity (Details)

Leases Maturity (Details) $ in Millions	Dec. 31, 2020USD ($)
Leases [Abstract]
2020 - Operating Leases	$ 287
2020 - Financing Leases	63
2021 - Operating Leases	233
2021 - Financing Leases	63
2022 - Operating Leases	146
2022 - Financing Leases	62
2023 - Operating Leases	94
2023 - Financing Leases	49
2024 - Operating Leases	70
2024 - Financing Leases	38
Thereafter - Operating Leases	428
Thereafter - Financing Leases	55
Total lease payments - Operating Leases	1,258
Total lease payments - Financing Leases	330
Imputed interest - Operating Leases	(249)
Imputed interest - Financing Leases	(188)
Total - Operating Leases	1,009
Total - Financing Leases	$ 142

Inventories (Details)

Inventories (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Inventory, net [Abstract]
Finished products and parts	$ 1,330	$ 1,865
Raw materials and supplies	952	1,147
Work in process	67	127
Total	2,349	3,139
Obsolescence reserves	$ 150	$ 149

Property, Plant, and Equipmen_2

Property, Plant, and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 15,364	$ 19,940
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	11,039	12,630
Net property, plant, and equipment	4,325	7,310
Impairment of Long-Lived Assets Held-for-use	2,300
Land
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	120	202
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 1,652	$ 3,167
Building and Building Improvements [Member] | 1    -   10 years
Property Plant Equipment Useful Lives Total Depreciated Percentages [Abstract]
Ratio of depreciation by useful asset life over total depreciation of asset (in hundredths)	13.00%	12.00%
Building and Building Improvements [Member] |    11    -   20 years
Property Plant Equipment Useful Lives Total Depreciated Percentages [Abstract]
Ratio of depreciation by useful asset life over total depreciation of asset (in hundredths)	41.00%	41.00%
Building and Building Improvements [Member] |    21    -   30 years
Property Plant Equipment Useful Lives Total Depreciated Percentages [Abstract]
Ratio of depreciation by useful asset life over total depreciation of asset (in hundredths)	21.00%	22.00%
Building and Building Improvements [Member] |    31    -   40 years
Property Plant Equipment Useful Lives Total Depreciated Percentages [Abstract]
Ratio of depreciation by useful asset life over total depreciation of asset (in hundredths)	25.00%	25.00%
Machinery, equipment, and other
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 13,592	$ 16,571
Machinery, equipment, and other |      1    -    5 years
Property Plant Equipment Useful Lives Total Depreciated Percentages [Abstract]
Ratio of depreciation by useful asset life over total depreciation of asset (in hundredths)	49.00%	43.00%
Machinery, equipment, and other |      6    -   10 years
Property Plant Equipment Useful Lives Total Depreciated Percentages [Abstract]
Ratio of depreciation by useful asset life over total depreciation of asset (in hundredths)	41.00%	47.00%
Machinery, equipment, and other |    11    -   20 years
Property Plant Equipment Useful Lives Total Depreciated Percentages [Abstract]
Ratio of depreciation by useful asset life over total depreciation of asset (in hundredths)	10.00%	10.00%
Minimum | Building and Building Improvements [Member] | 1    -   10 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	1 year
Minimum | Building and Building Improvements [Member] |    11    -   20 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	11 years
Minimum | Building and Building Improvements [Member] |    21    -   30 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	21 years
Minimum | Building and Building Improvements [Member] |    31    -   40 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	31 years
Minimum | Machinery, equipment, and other |      1    -    5 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	1 year
Minimum | Machinery, equipment, and other |      6    -   10 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	6 years
Minimum | Machinery, equipment, and other |    11    -   20 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	11 years
Maximum | Building and Building Improvements [Member] | 1    -   10 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	10 years
Maximum | Building and Building Improvements [Member] |    11    -   20 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	20 years
Maximum | Building and Building Improvements [Member] |    21    -   30 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	30 years
Maximum | Building and Building Improvements [Member] |    31    -   40 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	40 years
Maximum | Machinery, equipment, and other |      1    -    5 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	5 years
Maximum | Machinery, equipment, and other |      6    -   10 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	10 years
Maximum | Machinery, equipment, and other |    11    -   20 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	20 years

Debt (Details)

Debt (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
Gain (Loss) on Extinguishment of Debt	$ (168,000,000)	$ 0	$ 0
Long-term debt	9,132,000,000	10,316,000,000
Debt Instrument [Line Items]
Long-term Debt and Lease Obligation, Including Current Maturities	9,827,000,000	10,327,000,000
Short-term borrowings and current maturities of long-term debt	695,000,000	11,000,000
Debt Instrument, Unamortized Discount	$ (82,000,000)	(90,000,000)
Debt instrument call feature description	We may redeem all of our senior notes from time to time or all of the notes of each series at any time at the applicable redemption prices, plus accrued and unpaid interest.
Long-term Line of Credit	$ 3,500,000,000
Line of Credit Facility, Remaining Borrowing Capacity	3,500,000,000
Long-term Debt, Current Maturities	695,000,000	11,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Two	9,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Three	602,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Four	0
Long-term Debt, Maturities Repayments of Principal in Year Five	1,000,000,000
Long-term debt	9,132,000,000	10,316,000,000
Gain (Loss) on Extinguishment of Debt	(168,000,000)	0	$ 0
Senior notes due November 2045
Debt Disclosure [Abstract]
Long-term debt	$ 2,000,000,000	$ 2,000,000,000
Debt Instrument [Line Items]
Interest rate (in hundredths)	5.00%	5.00%
Maturity date	November 2045	November 2045
Long-term debt	$ 2,000,000,000	$ 2,000,000,000
Senior Notes due November 2025
Debt Disclosure [Abstract]
Long-term debt	$ 1,000,000,000	$ 2,000,000,000
Debt Instrument [Line Items]
Interest rate (in hundredths)	3.80%	3.80%
Maturity date	November 2025	November 2025
Long-term debt	$ 1,000,000,000	$ 2,000,000,000
Senior notes due August 2023
Debt Disclosure [Abstract]
Long-term debt	$ 600,000,000	$ 1,100,000,000
Debt Instrument [Line Items]
Interest rate (in hundredths)	3.50%	3.50%
Maturity date	August 2023	August 2023
Long-term debt	$ 600,000,000	$ 1,100,000,000
Senior Notes due November 2035
Debt Disclosure [Abstract]
Long-term debt	$ 1,000,000,000	$ 1,000,000,000
Debt Instrument [Line Items]
Interest rate (in hundredths)	4.85%	4.85%
Maturity date	November 2035	November 2035
Long-term debt	$ 1,000,000,000	$ 1,000,000,000
Senior notes due September 2039
Debt Disclosure [Abstract]
Long-term debt	$ 1,000,000,000	$ 1,000,000,000
Debt Instrument [Line Items]
Interest rate (in hundredths)	7.45%	7.45%
Maturity date	September 2039	September 2039
Long-term debt	$ 1,000,000,000	$ 1,000,000,000
Senior notes due August 2043
Debt Disclosure [Abstract]
Long-term debt	$ 900,000,000	$ 900,000,000
Debt Instrument [Line Items]
Interest rate (in hundredths)	4.75%	4.75%
Maturity date	August 2043	August 2043
Long-term debt	$ 900,000,000	$ 900,000,000
Senior notes due September 2038
Debt Disclosure [Abstract]
Long-term debt	$ 800,000,000	$ 800,000,000
Debt Instrument [Line Items]
Interest rate (in hundredths)	6.70%	6.70%
Maturity date	September 2038	September 2038
Long-term debt	$ 800,000,000	$ 800,000,000
Senior notes due November 2021
Debt Disclosure [Abstract]
Long-term debt	$ 500,000,000	$ 500,000,000
Debt Instrument [Line Items]
Interest rate (in hundredths)	3.25%	3.25%
Maturity date	November 2021	November 2021
Long-term debt	$ 500,000,000	$ 500,000,000
Senior notes due November 2041
Debt Disclosure [Abstract]
Long-term debt	$ 500,000,000	$ 500,000,000
Debt Instrument [Line Items]
Interest rate (in hundredths)	4.50%	4.50%
Maturity date	November 2041	November 2041
Long-term debt	$ 500,000,000	$ 500,000,000
Senior debentures due August 2096
Debt Disclosure [Abstract]
Long-term debt	$ 300,000,000	$ 300,000,000
Debt Instrument [Line Items]
Interest rate (in hundredths)	7.60%	7.60%
Debt instruments non-call feature description	may not be redeemed prior to maturity
Maturity date	August 2096	August 2096
Long-term debt	$ 300,000,000	$ 300,000,000
Senior debentures due February 2021
Debt Disclosure [Abstract]
Long-term debt	$ 185,000,000	$ 185,000,000
Debt Instrument [Line Items]
Interest rate (in hundredths)	8.75%	8.75%
Debt instruments non-call feature description	may not be redeemed prior to maturity
Maturity date	February 2021	February 2021
Long-term debt	$ 185,000,000	$ 185,000,000
Senior notes due February 2027
Debt Disclosure [Abstract]
Long-term debt	$ 104,000,000	$ 104,000,000
Debt Instrument [Line Items]
Interest rate (in hundredths)	6.75%	6.75%
Debt instruments non-call feature description	may not be redeemed prior to maturity
Maturity date	February 2027	February 2027
Long-term debt	$ 104,000,000	$ 104,000,000
Other Debt Obligations
Debt Disclosure [Abstract]
Long-term debt	20,000,000	28,000,000
Debt Instrument [Line Items]
Long-term debt	20,000,000	28,000,000
Senior notes due March 2030
Debt Disclosure [Abstract]
Long-term debt	$ 1,000,000,000	0
Debt Instrument [Line Items]
Interest rate (in hundredths)	2.92%
Long-term debt	$ 1,000,000,000	$ 0
Tender Offer on Senior notes due August 2023 and November 2025 [Member]
Debt Disclosure [Abstract]
Long-term debt	1,500,000,000
Debt Instrument [Line Items]
Long-term debt	1,500,000,000
Tender Offer on Senior note due August 2023 [Member]
Debt Disclosure [Abstract]
Long-term debt	500,000,000
Debt Instrument [Line Items]
Long-term debt	500,000,000
Tender Offer on Senior note due November 2025 [Member]
Debt Disclosure [Abstract]
Long-term debt	1,000,000,000
Debt Instrument [Line Items]
Long-term debt	$ 1,000,000,000

Commitments and Contingencies (

Commitments and Contingencies (Guarantee Arrangements) (Details) $ in Billions	Dec. 31, 2020USD ($)
Financial agreements
Guarantee arrangements [Abstract]
Guarantee arrangements outstanding	$ 1.9

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
Current income taxes:
Federal		$ 1		$ 32		$ 19
Foreign		(167)		(426)		(428)
State		0		(9)		(15)
Total current		(166)		(403)		(424)
Deferred income taxes:
Federal		372		383		286
Foreign		2		(36)		9
State		70		49		(28)
Total deferred		444		396		267
Income tax (provision) benefit		278		(7)		(157)
The United States and foreign components of income from continuing operations before income taxes [Abstract]
United States		(3,031)		(1,517)		1,097
Foreign		(189)		395		717
Income (loss) from continuing operations before income taxes		$ (3,220)		$ (1,122)		$ 1,814
Reconciliations between the actual provision for income taxes on continuing operations [Abstract]
United States statutory rate		21.00%		21.00%		21.00%
Impact of impairments and other charges		(12.30%)		(20.90%)		0.00%
Adjustments of prior year taxes		0.70%		13.00%		2.00%
Valuation allowance against tax assets		0.90%		(10.70%)		(16.20%)
State income taxes		0.00%		(1.30%)		1.90%
Impact of foreign income taxed at different rates		(1.10%)		0.80%		(3.00%)
Venezuela adjustment		0.00%		0.00%		5.70%
Impact of U.S. tax reform		0.00%		0.00%		(2.60%)
Other items, net		(0.60%)		(2.50%)		(0.10%)
Total effective tax rate on continuing operations		8.60%		(0.60%)		8.70%
Gross deferred tax assets:
Net operating loss carryforwards		$ 1,691		$ 1,301
Foreign tax credit carryforwards		945		877
Research and development tax credit carryforwards		196		198
Employee compensation and benefits		237		215
Accrued Liabilities		263		316
Other		469		382
Total gross deferred tax assets		3,801		3,289
Gross deferred tax liabilities:
Depreciation and amortization		7		373
Operating lease right-of-use assets		86		109
Other		155		58
Total gross deferred tax liabilities		248		540
Valuation allowances		1,394		1,082
Net deferred income tax asset		2,159		1,667
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration		1,800
Unrecognized Tax Benefits, Period Increase (Decrease)		133
Unrecognized Tax Benefits
Beginning Balance		425	[1]	417		$ 333
Change in prior year tax positions		(66)				(32)
Change in prior year tax positions				25
Change in current year tax positions		16		29		63
Cash settlements with taxing authorities		(3)		(4)		(7)
Lapse of statute of limitations		(17)		(42)		(4)
Ending balance		355	[1],[2]	425	[1]	417
Interest and Penalties
Beginning balance		70		67		60
Change in prior year tax positions		6		11		11
Change in current year tax positions		0		0		0
Cash settlements with taxing authorities		0		0		(2)
Lapse of statute of limitations		(5)		(8)		(2)
Ending balance		71		70		67
Remaining balance if resolved in our favor would positively impact the effective tax rate		224		271
Portion of unrecognized tax benefits that could be resolved within the next 12 months		17
Impairments and other charges	[3]	(3,799)		(2,506)		(265)
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		312
Net operating loss carryforwards		1,691		1,301
Foreign tax credit carryforwards		945		877
Research and development tax credit carryforwards		196		198
Deferred Tax Assets, Operating Loss Carryforwards, Domestic, Not Subject to Expiration		312
Deferred Tax Assets, Operating Loss Carryforwards, Foreign, Not Subject to Expiration		435
Deferred Tax Assets, Tax Credit Carryforwards, Foreign, Not Subject to Expiration		0
Deferred Tax Assets, Tax Credit Carryforwards, Research, Not Subject to Expiration		0
Deferred Tax Assets, Operating Loss Carryforwards and Tax Credit Carryforwards, Not Subject to Expiration		747
Deferred Tax Assets, Estimated Tax Credit Carryforwards, Research		196
Deferred Tax Assets, Estimated Tax Credit Carryforwards, Foreign		1,090
Deferred Tax Assets, Estimated Operating Loss Carryforwards, Foreign		838
Deferred Tax Assets, Estimated Operating Loss Carryforwards, Domestic		986
Deferred Tax Assets, Operating Loss Carryforwards and Tax Credit Carryforwards		3,110
2021-2025
Gross deferred tax assets:
Foreign tax credit carryforwards		533
Research and development tax credit carryforwards		0
Interest and Penalties
U.S. Net Operating Loss		2
Foreign Net Operating Loss		186
Foreign tax credit carryforwards		533
Research and development tax credit carryforwards		0
Deferred Tax Assets, Gross		721
2026-2030
Gross deferred tax assets:
Foreign tax credit carryforwards		557
Research and development tax credit carryforwards		0
Interest and Penalties
U.S. Net Operating Loss		7
Foreign Net Operating Loss		125
Foreign tax credit carryforwards		557
Research and development tax credit carryforwards		0
Deferred Tax Assets, Gross		689
2031-2041
Gross deferred tax assets:
Foreign tax credit carryforwards		0
Research and development tax credit carryforwards		196
Interest and Penalties
U.S. Net Operating Loss		665
Foreign Net Operating Loss		92
Foreign tax credit carryforwards		0
Research and development tax credit carryforwards		196
Deferred Tax Assets, Gross		953
VENEZUELA
Interest and Penalties
Impairments and other charges	[3]					$ (265)
All Other Countries [Domain]
Interest and Penalties
Remaining balance if resolved in our favor would positively impact the effective tax rate		18		$ 25
Deferred tax assets [Member] | Foreign
Interest and Penalties
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		16
Tax credits [Member] | Foreign
Interest and Penalties
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		$ 296
[1]	Includes $18 million as of December 31, 2020 and $25 million as of December 31, 2019 in foreign unrecognized tax benefits that would give rise to a United States tax credit. As of December 31, 2020 and December 31, 2019, a net $224 million and $271 million without a net operating loss carryforward offset, respectively, of unrecognized tax benefits would positively impact the effective tax rate and be recognized as additional tax benefits in our statement of operations if resolved in our favor.
[2]	Includes $17 million that could be resolved within the next 12 months.
[3]	Impairments and other charges are as follows: -For the year ended December 31, 2020, amount includes approximately $2.4 billion attributable to Completion and Production, $1.4 billion attributable to Drilling and Evaluation, and $62 million attributable to Corporate and other. -For the year ended December 31, 2019, amount includes approximately $1.6 billion attributable to Completion and Production, $849 million attributable to Drilling and Evaluation, and $56 million attributable to Corporate and other. -For the years ended December 31, 2018, we recorded aggregate charges of $265 million to write-down our investment in Venezuela.

Shareholders' Equity (Sharehold

Shareholders' Equity (Shareholders' Equity, Accumulated Other Comprehensive Loss, Common Stock, and Preferred Stock) (Details) - USD ($)		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Issued		1,066,000,000	1,068,000,000
In treasury		(181,000,000)	(190,000,000)
Total shares of common stock outstanding		885,000,000	878,000,000
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Defined benefit and other postretirement liability adjustments	[1]	$ (226,000,000)	$ (214,000,000)
Cumulative translation adjustment		(83,000,000)	(82,000,000)
Other		(53,000,000)	(66,000,000)
Total accumulated other comprehensive loss		$ (362,000,000)	$ (362,000,000)
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Stock Repurchased During Period, Shares		7,400,000	4,500,000
Treasury Stock, Value, Acquired, Cost Method		$ 100,000,000
Stock authorized to repurchase		$ 5,100,000,000
Number of shares of common stock repurchased from inception (in shares)		224,000,000
Approximate value of shares of common stock repurchased from inception		$ 9,000,000,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Number of shares of preferred stock that are authorized for issuance (in shares)		5,000,000
Number of shares preferred stock that are issued at period end (in shares)		0
Foreign Plan [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net actuarial losses		$ 212,000,000	$ 189,000,000
[1]	Included net actuarial losses for our international pension plans of $212 million at December 31, 2020 and $189 million at December 31, 2019.

Stock-based Compensation (Detai

Stock-based Compensation (Details) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)Offering_Period$ / sharesshares	Dec. 31, 2019USD ($)$ / sharesshares	Dec. 31, 2018USD ($)$ / shares
Share-based Payment Arrangement, Additional Disclosure [Abstract]
Proceeds from issuance of common stock | $	$ 87	$ 118	$ 195
Stock Incentive Plans
Share-based Compensation Arrangement by Share-based Payment Award
Stock-based compensation cost | $	218	257	274
Tax benefit | $	(35)	(48)	(51)
Stock-based compensation cost, net of tax | $	$ 183	$ 209	223
Number of shares reserved for issuance to recipient (in shares)	247
Number of shares available for future grant (in shares)	23
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award
Expiration from date of award (in years)	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at beginning of period	25.3
Granted	2.2
Forfeited/expired	(1.6)
Outstanding at end of period	25.9	25.3
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding- weighted average exercise price at beginning of period (in dollars per share) | $ / shares	$ 41.58
Granted | $ / shares	24.59
Forfeited/expired | $ / shares	37.87
Outstanding- weighted average price per share end of period (in dollars per share) | $ / shares	$ 40.36	$ 41.58
Weighted Average Remaining Contractual Term (years)	5 years 4 months 24 days
Aggregate Intrinsic Value | $	$ 0
Number of shares exercisable at the end of the period	19.7
Weighted Average Exercise Price per Share, Exercisable at the end of the period | $ / shares	$ 44.29
Weighted Average Remaining Contractual Term (years), Exercisable at the end of the period	4 years 6 months
Aggregate Intrinsic Value, Exercisable at the end of the Period | $	$ 0
Intrinsic value of stock options exercised during the period | $	7	$ 2	25
Share-based Payment Arrangement, Additional Disclosure [Abstract]
Unrecognized compensation cost, non vested awards at period end | $	$ 20
Weighted average period unrecognized compensation costs to be recognized (in years)	2 years
Proceeds from issuance of common stock | $	$ 87	$ 118	$ 195
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected term	5 years 4 months 20 days	5 years 3 months 21 days	5 years 3 months 7 days
Expected volatility	33.00%	31.00%	28.00%
Weighted average grant-date fair value of option | $ / shares	$ 5.41	$ 5.91	$ 11.56
Stock Options | Minimum
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected dividend yield	2.25%	1.37%	1.28%
Risk-free interest rate	1.35%	2.27%	1.79%
Stock Options | Maximum
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected dividend yield	3.88%	2.29%	1.72%
Risk-free interest rate	2.51%	2.84%	2.14%
Exercise of stock options [Member]
Share-based Payment Arrangement, Additional Disclosure [Abstract]
Proceeds from issuance of common stock | $	$ 0	$ 6	$ 88
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award
Number of shares reserved for issuance to recipient (in shares)	74
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected volatility	68.00%	34.00%	25.00%
Expected dividend yield	4.89%	3.06%	1.62%
Risk-free interest rate	0.65%	2.20%	1.92%
Weighted average grant-date fair value of option | $ / shares	$ 3.18	$ 5.22	$ 8.86
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Shares available for future issuance through the plan	9
Employee Stock Purchase Plan [Abstract]
Percentage of earnings eligible employees may have withheld under the employee stock purchase plan	10.00%
Number of offering periods | Offering_Period	4
Number of months each offering period lasts beginning January 1 and July 1 each year (in months)	3 months
Percentage of the lower of fair market value of the unit on the commencement date or the fair market value of unit on the last trading day of the offering period	90.00%
Number of shares sold through the plan (in shares)	65
Restricted Stock And Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested shares at the beginning of the period	18.1
Granted	8.2
Vested	(5.4)
Forfeited	(1.9)
Non vested shares at the end of the period	19	18.1
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Weighted Average Grant-Date Fair Value per Share, Non vested shares at the beginning of the period | $ / shares	$ 34.72
Granted | $ / shares	16.53	$ 24.75	$ 47.43
Vested | $ / shares	36.97
Forfeited | $ / shares	33.66
Weighted Average Grant-Date Fair Value Per Share, Nonvested shares at the end of the period | $ / shares	$ 26.26	$ 34.72
Total fair value of shares vested during the period | $	$ 79	$ 107	$ 219
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award
Expiration from date of award (in years)	5 years
Share-based Payment Arrangement, Additional Disclosure [Abstract]
Unrecognized compensation cost, non vested awards at period end | $	$ 330
Weighted average period unrecognized compensation costs to be recognized (in years)	3 years

Income per Share (Details)

Income per Share (Details) - shares shares in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Antidilutive shares:
Basic weighted average common shares outstanding	881	875	875
Dilutive effect of awards granted under our stock incentive plans	0	0	2
Diluted weighted average common shares outstanding	881	875	877
Stock Options
Antidilutive shares:
Options with exercise price greater than the average market price	27	24	14
Options which are antidilutive due to net loss position	1	1	0
Total antidilutive shares	28	25	14

Financial Instruments and Ris_3

Financial Instruments and Risk Management (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Number of days from period end	2 days
Foreign Currency Derivatives [Abstract]
Maximum term of currency derivative instruments (in years)	1 year
Long-term Debt, Percentage Bearing Fixed Interest, Amount	$ 9,800	$ 10,300
Estimate of Fair Value, Fair Value Disclosure
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt	11,556	11,961
Estimate of Fair Value, Fair Value Disclosure | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt	10,856	11,093
Estimate of Fair Value, Fair Value Disclosure | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt	700	868
Estimate of Fair Value, Fair Value Disclosure | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt	0	0
Carrying (Reported) Amount, Fair Value Disclosure
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, Long-term and Short-term, Combined Amount	9,827	10,327
Foreign Exchange Contract [Member] | Other current assets | Level 2
Interest Rate Derivatives [Abstract]
Derivative, Notional Amount	817	513
Foreign Exchange Contract [Member] | Other assets | Level 2
Interest Rate Derivatives [Abstract]
Derivative, Notional Amount	$ 100	$ 100

Financial Instruments and Ris_4

Financial Instruments and Risk Management (Credit Risk) (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
United States | Geographic Concentration Risk | Accounts Receivable
Concentration Risk [Line Items]
Concentration Risk, Percentage	32.00%	36.00%

Retirement Plans (Retirement Pl

Retirement Plans (Retirement Plans, Funded Status) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Expense for the defined contribution plans for continuing operations		$ 100	$ 206	$ 193
Foreign Plan [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at end of period		1,200	1,100
Fair value of plan assets at end of period		1,077	1,002
Funded status at end of period		152	111
Defined Benefit Plan, Accumulated Benefit Obligation		1,100	1,000
Amounts recognized on the Consolidated Balance Sheets
Other Assets		45	85
Accrued employee compensation and benefits		8	7
Employee compensation and benefits		189	189
Pension plans in which projected benefit obligation exceeded plan assets
Projected benefit obligation		228	214
Fair value of plan assets		31	18
Pension plans in which accumulated benefit obligation exceeded plan assets
Accumulated benefit obligation		126	121
Fair value of plan assets		25	18
Foreign Plan [Member] | Cash and equivalents
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period		136	151
Foreign Plan [Member] | Equity funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[1]	170	118
Foreign Plan [Member] | Bond funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[2]	468	391
Foreign Plan [Member] | Alternatives fund
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[3]	167	197
Foreign Plan [Member] | Real estate funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[4]	96	103
Foreign Plan [Member] | Other investments
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[5]	40	42
Foreign Plan [Member] | Level 1
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period		5	6
Foreign Plan [Member] | Level 1 | Cash and equivalents
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period		0	0
Foreign Plan [Member] | Level 1 | Equity funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[1]	0	0
Foreign Plan [Member] | Level 1 | Bond funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[2]	0	0
Foreign Plan [Member] | Level 1 | Alternatives fund
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[3]	0	0
Foreign Plan [Member] | Level 1 | Real estate funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[4]	0	0
Foreign Plan [Member] | Level 1 | Other investments
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[5]	5	6
Foreign Plan [Member] | Level 2
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period		718	656
Foreign Plan [Member] | Level 2 | Cash and equivalents
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period		136	151
Foreign Plan [Member] | Level 2 | Equity funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[1]	170	118
Foreign Plan [Member] | Level 2 | Bond funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[2]	319	292
Foreign Plan [Member] | Level 2 | Alternatives fund
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[3]	4	0
Foreign Plan [Member] | Level 2 | Real estate funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[4]	68	74
Foreign Plan [Member] | Level 2 | Other investments
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[5]	21	21
Foreign Plan [Member] | Level 3
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period		14	15
Foreign Plan [Member] | Level 3 | Cash and equivalents
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period		0	0
Foreign Plan [Member] | Level 3 | Equity funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[1]	0	0
Foreign Plan [Member] | Level 3 | Bond funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[2]	0	0
Foreign Plan [Member] | Level 3 | Alternatives fund
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[3]	0	0
Foreign Plan [Member] | Level 3 | Real estate funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[4]	0	0
Foreign Plan [Member] | Level 3 | Other investments
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[5]	14	15
Foreign Plan [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[6]	340	325
Foreign Plan [Member] | Fair Value Measured at Net Asset Value Per Share [Member] | Cash and equivalents
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[6]	0	0
Foreign Plan [Member] | Fair Value Measured at Net Asset Value Per Share [Member] | Equity funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[1],[6]	0	0
Foreign Plan [Member] | Fair Value Measured at Net Asset Value Per Share [Member] | Bond funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[2],[6]	149	99
Foreign Plan [Member] | Fair Value Measured at Net Asset Value Per Share [Member] | Alternatives fund
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[3],[6]	163	197
Foreign Plan [Member] | Fair Value Measured at Net Asset Value Per Share [Member] | Real estate funds
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[4],[6]	28	29
Foreign Plan [Member] | Fair Value Measured at Net Asset Value Per Share [Member] | Other investments
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[5],[6]	$ 0	$ 0
United Kingdom Pension Plan [Member]
Pension plans in which accumulated benefit obligation exceeded plan assets
United Kingdom pension plan percentage of international pension plans' projected benefit obligations		81.00%
[1]	Strategy of equity funds is to invest in diversified funds of global common stocks.
[2]	Strategy of bond funds is to invest in diversified funds of fixed income securities of varying geographies and credit quality.
[3]	Strategy of alternative funds is to invest in a fund of diversifying investments, including but not limited to reinsurance, commodities, and currencies.
[4]	Strategy of real estate funds is to invest in diversified funds of real estate investment trusts and private real estate.
[5]	Other investments primarily include investments in insurance contracts, balanced funds, and government bonds.
[6]	Represents investments measured at fair value using the Net Asset Value (NAV) per share practical expedient and thus has not been categorized in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the total value of our international pension plans assets.

Retirement Plans (Retirement _2

Retirement Plans (Retirement Plans, Net Periodic Benefit Cost, Assumptions, and Expected Cash Flows) (Details) - Foreign Plan [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	$ 17
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 30	$ 23	$ 32
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	1.80%	2.50%
Rate of compensation increase	5.90%	6.00%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	2.50%	3.30%	2.80%
Expected long-term return on plan assets	3.50%	4.40%	4.10%
Rate of compensation increase	6.00%	5.80%	5.50%

Retirement Plans International

Retirement Plans International Pension Plan, Expected Benefit Payments (Details) - Foreign Plan [Member] $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of years annual benefit payments	10 years
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 46
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	44
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	45
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	45
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	47
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 266