Halliburton (HAL) 10-K 13 Feb 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Feb. 08, 2019	Jun. 30, 2018
Document And Enity Information [Abstract]
Entity Registrant Name	HALLIBURTON COMPANY
Entity Central Index Key	45,012
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 39,500,000,000
Entity Common Stock, Shares Outstanding		872,542,842
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue:
Revenue		$ 23,995	$ 20,620	$ 15,887
Operating costs and expenses:
Merger-related costs and termination fee		0	0	4,057
Impairments and other charges	[1]	265	647	3,357
General and administrative		254	256	226
Total operating costs and expenses		21,528	19,246	22,657
Operating income (loss)		2,467	1,374	(6,770)
Interest expense, net of interest income		(554)	(593)	(639)
Other, net		(99)	(99)	(216)
Income (loss) from continuing operations before income taxes		1,814	682	(7,625)
Income tax benefit (provision)		(157)	(1,131)	1,858
Income (loss) from continuing operations		1,657	(449)	(5,767)
Loss from discontinued operations, net		0	(19)	(2)
Net income (loss)		1,657	(468)	(5,769)
Net (income) loss attributable to noncontrolling interest		(1)	5	6
Net income (loss) attributable to company		1,656	(463)	(5,763)
Amounts attributable to company shareholders:
Income (loss) from continuing operations		1,656	(444)	(5,761)
Loss from discontinued operations, net		0	(19)	(2)
Net income (loss) attributable to company		$ 1,656	$ (463)	$ (5,763)
Basic and diluted loss per share attributable to company shareholders:
Income (loss) from continuing operations (in dollars per share)		$ 1.89	$ (0.51)	$ (6.69)
Loss from discontinued operations, net (in dollars per share)		0	(0.02)	0
Net income (loss) per share (in dollars per share)		$ 1.89	$ (0.53)	$ (6.69)
Basic weighted average common shares outstanding		875	870	861
Diluted weighted average common shares outstanding		877	870	861
Services [Member]
Revenue:
Revenue		$ 18,444	$ 15,408	$ 11,140
Operating costs and expenses:
Cost of services and sales		16,591	14,205	11,249
Product sales [Member]
Revenue:
Revenue		5,551	5,212	4,747
Operating costs and expenses:
Cost of services and sales		$ 4,418	$ 4,138	$ 3,768
[1]	Impairments and other charges are as follows: -For the year ended December 31, 2018, the aggregate charge of $265 million represents a write-down of all of our remaining investment in Venezuela, consisting of receivables, fixed assets, inventory and other assets and liabilities. -For the year ended December 31, 2017, the aggregate charge of $647 million represents a fair market value adjustment on our existing promissory note with our primary customer in Venezuela and a full reserve against our other accounts receivable with this customer. -For the year ended December 31, 2016, the aggregate charge of $3.4 billion consisted of fixed asset impairments and write-offs, inventory write-downs, impairments of intangible assets, severance costs, country and facility closures, and other charges related to the energy downturn. This included $2.1 billion attributable to Completion and Production, $1.2 billion attributable to Drilling and Evaluation and $10 million

Consolidated Statements of Op_2

Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest income	$ 44	$ 112	$ 59

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net income (loss)	$ 1,657	$ (468)	$ (5,769)
Other comprehensive income (loss), net of income taxes:
Defined benefit and other postretirement plans adjustments	131	(22)	(92)
Other	(17)	7	1
Other comprehensive income (loss), net of income taxes	114	(15)	(91)
Comprehensive income (loss)	1,771	(483)	(5,860)
Comprehensive (income) loss attributable to noncontrolling interest	(1)	5	6
Comprehensive income (loss) attributable to company shareholders	$ 1,770	$ (478)	$ (5,854)

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and equivalents	$ 2,008
Cash and equivalents	2,008	$ 2,337
Receivables (net of allowances for bad debts)	5,234	5,036
Inventories	3,028	2,396
Other current assets	881	1,008
Total current assets	11,151	10,777
Property, plant and equipment (net of accumulated depreciation)	8,961	8,521
Goodwill	2,825	2,693
Deferred income taxes	1,384	1,230
Other assets	1,661	1,864
Total assets	25,982	25,085
Current liabilities:
Accounts payable	3,018	2,554
Accrued employee compensation and benefits	714	746
Taxes other than income	248	231
Short-term borrowings and current maturities of long-term debt	36	512
Other current liabilities	786	819
Total current liabilities	4,802	4,862
Long-term debt	10,421	10,430
Employee compensation and benefits	483	609
Other liabilities	732	835
Total liabilities	16,438	16,736
Shareholders’ equity:
Common shares, par value $2.50 per share	2,671	2,673
Paid-in capital in excess of par value	211	207
Accumulated other comprehensive loss	(355)	(469)
Retained earnings	13,739	12,668
Treasury stock, at cost	(6,744)	(6,757)
Company shareholders’ equity	9,522	8,322
Noncontrolling interest in consolidated subsidiaries	22	27
Total shareholders’ equity	9,544	8,349
Total liabilities and shareholders’ equity	$ 25,982	$ 25,085

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Millions, $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Allowance for bad debt	$ 738	$ 725
Accumulated depreciation	$ 13,182	$ 12,249
Shareholders’ equity:
Common stock, par value (in dollars per share)	$ 2.50	$ 2.50
Common stock, shares authorized (in shares)	2,000	2,000
Common stock, shares issued (in shares)	1,069	1,069
Treasury shares (in shares)	198	196

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income (loss)	$ 1,657	$ (468)	$ (5,769)
Adjustments to reconcile net income (loss) to cash flows from operating activities:
Depreciation, depletion and amortization	1,606	1,556	1,503
Deferred income tax provision (benefit), continuing operations	(267)	734	(1,501)
Impairments and other charges	265	647	3,357	[1]
Changes in assets and liabilities:
Inventories	(681)	(29)	552
Accounts payable	483	753	(219)
Receivables	(186)	(1,350)	899
Other	280	625	(525)
Total cash flows provided by (used in) operating activities	3,157	2,468	(1,703)
Cash flows from investing activities:
Capital expenditures	(2,026)	(1,373)	(798)
Sales of investment securities	527	98	96
Purchases of investment securities	(423)	(109)	(92)
Proceeds from sales of property, plant and equipment	218	158	222
Payments to acquire businesses, net of cash acquired	(187)	(628)	(31)
Other investing activities	(102)	(73)	(107)
Total cash flows provided by (used in) investing activities	(1,993)	(1,927)	(710)
Cash flows from financing activities:
Dividends to shareholders	(630)	(626)	(620)
Payments on long-term borrowings	(445)	(1,641)	(3,171)
Stock repurchase program	(400)	0	0
Proceeds from issuance of common stock	195	158	186
Other financing activities	(139)	(52)	65
Total cash flows provided by (used in) financing activities	(1,419)	(2,161)	(3,540)
Effect of exchange rate changes on cash	(74)	(52)	(115)
Decrease in cash and equivalents	(329)	(1,672)	(6,068)
Cash and equivalents at beginning of year	2,337	4,009	10,077
Cash and equivalents at end of year	2,008	2,337	4,009
Cash payments (receipts) during the period for:
Interest	556	594	659
Income taxes	$ 178	$ (178)	$ (20)
[1]	Impairments and other charges are as follows: -For the year ended December 31, 2018, the aggregate charge of $265 million represents a write-down of all of our remaining investment in Venezuela, consisting of receivables, fixed assets, inventory and other assets and liabilities. -For the year ended December 31, 2017, the aggregate charge of $647 million represents a fair market value adjustment on our existing promissory note with our primary customer in Venezuela and a full reserve against our other accounts receivable with this customer. -For the year ended December 31, 2016, the aggregate charge of $3.4 billion consisted of fixed asset impairments and write-offs, inventory write-downs, impairments of intangible assets, severance costs, country and facility closures, and other charges related to the energy downturn. This included $2.1 billion attributable to Completion and Production, $1.2 billion attributable to Drilling and Evaluation and $10 million

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions	Total	Common Shares	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, 2015	$ 15,495	$ 2,677	$ 274	$ (7,650)	$ 20,524	$ (363)	$ 33
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(5,769)	0	0	0	(5,763)	0	(6)
Other comprehensive income (loss)	(91)	0	0	0	0	(91)	0
Cash dividends	(620)	0	0	0	(620)	0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders							0
Stock plans	425	(3)	(69)	497	0	0	0
Other	(8)	0	4	0	0	0	(12)
Ending balance at Dec. 31, 2016	9,448	2,674	201	(7,153)	14,141	(454)	39
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(468)	0	0	0	(463)	0	(5)
Other comprehensive income (loss)	(15)	0	0	0	0	(15)	0
Cash dividends	(626)	0	0	0	(626)	0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders							0
Stock plans	401	(1)	6	396	0	0	0
Other	7	0	0	0	0	0	7
Ending balance at Dec. 31, 2017	8,349	2,673	207	(6,757)	12,668	(469)	27
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Retained earnigs adjustment for new accounting standard	(384)	0	0	0	(384)	0	0
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
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders							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

Consolidated Statements of Sh_2

Consolidated Statements of Shareholders' Equity Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Stockholders' Equity [Abstract]
Dividends declared (in dollars per share)	$ 0.72	$ 0.72	$ 0.72

Description of Company and Sign

Description of Company and Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
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’s predecessor was established in 1919 and incorporated under the laws of the State of Delaware in 1924. We help our customers maximize 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 effective income tax rate and the valuation of deferred taxes, legal and environmental reserves, long-lived asset valuations, purchase price allocations and allowance for bad debts. 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 Effective January 1, 2018, we adopted a comprehensive new revenue recognition standard using a modified retrospective basis. The comparative information for the years ended December 31, 2017 and December 31, 2016 has not been adjusted and continues to be reported under the previous revenue standard, the accounting policies for which are discussed below. 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. We recognize revenue from product sales when title passes to the customer, the customer assumes risks and rewards of ownership, collectability is reasonably assured and delivery occurs as directed by our customer. Service revenue, including training and consulting services, is recognized when the services are rendered and collectability is reasonably assured. Rates for services are typically priced on a per day, per meter, per man-hour or similar basis. See Note 3 for changes to these accounting policies for the year ended December 31, 2018 and Note 15 for additional information about the new revenue standard. 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 $390 million in 2018 , $360 million in 2017 and $329 million in 2016 . 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. Some domestic manufacturing and field service finished products and parts inventories for drill bits, completion products and bulk materials are recorded using the last-in, first-out method. The remaining inventory is recorded on the 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 We establish an allowance for bad debts through a review of several factors, including historical collection experience, current aging status of the customer accounts and financial condition of our customers. Our policy is to write off bad debts 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 used for tax purposes, wherever 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, 2016: $ 1,679 $ 735 $ 2,414 Current year acquisitions 249 36 285 Purchase price adjustments for previous acquisitions (6 ) — (6 ) Balance at December 31, 2017: $ 1,922 $ 771 $ 2,693 Current year acquisitions 99 6 105 Purchase price adjustments for previous acquisitions 34 (7 ) 27 Balance at December 31, 2018: $ 2,055 $ 770 $ 2,825 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, 2018 , 2017 and 2016 , 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 “ 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 an asset classified as held for use, the estimated future undiscounted cash flows associated with the asset are compared to the asset’s carrying amount to determine if a write-down to fair value is required. 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 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 11

Business Segment and Geographic

Business Segment and Geographic Information	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Business Segment and Geographic Information	Business Segment and Geographic Information We 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. For more information about the product service lines included in each segment, see Part I, Item 1, "Business.” The business operations of our divisions are organized around four primary geographic regions: North America, Latin America, Europe/Africa/CIS and Middle East/Asia. Intersegment revenue and revenue between geographic areas are immaterial. 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 2018 2017 2016 Revenue: Completion and Production $ 15,973 $ 13,077 $ 8,882 Drilling and Evaluation 8,022 7,543 7,005 Total revenue $ 23,995 $ 20,620 $ 15,887 Operating income (loss): Completion and Production $ 2,278 $ 1,625 $ 108 Drilling and Evaluation 745 726 801 Total operations 3,023 2,351 909 Corporate and other (a) (291 ) (330 ) (4,322 ) Impairments and other charges (b) (265 ) (647 ) (3,357 ) Total operating income (loss) $ 2,467 $ 1,374 $ (6,770 ) Interest expense, net of interest income $ (554 ) $ (593 ) $ (639 ) Other, net (99 ) (99 ) (216 ) Income (loss) from continuing operations before income taxes $ 1,814 $ 682 $ (7,625 ) Capital expenditures: Completion and Production $ 1,364 $ 1,111 $ 500 Drilling and Evaluation 657 261 297 Corporate and other 5 1 1 Total $ 2,026 $ 1,373 $ 798 Depreciation, depletion and amortization: Completion and Production $ 1,058 $ 953 $ 900 Drilling and Evaluation 512 563 569 Corporate and other 36 40 34 Total $ 1,606 $ 1,556 $ 1,503 (a) Includes certain expenses not attributable to a particular business segment, such as costs related to support functions and corporate executives, and also includes amortization expense associated with intangible assets recorded as a result of acquisitions. Also includes merger-related costs and a termination fee during the year ended December 31, 2016. (b) Impairments and other charges are as follows: -For the year ended December 31, 2018, the aggregate charge of $265 million represents a write-down of all of our remaining investment in Venezuela, consisting of receivables, fixed assets, inventory and other assets and liabilities. -For the year ended December 31, 2017, the aggregate charge of $647 million represents a fair market value adjustment on our existing promissory note with our primary customer in Venezuela and a full reserve against our other accounts receivable with this customer. -For the year ended December 31, 2016, the aggregate charge of $3.4 billion consisted of fixed asset impairments and write-offs, inventory write-downs, impairments of intangible assets, severance costs, country and facility closures, and other charges related to the energy downturn. This included $2.1 billion attributable to Completion and Production, $1.2 billion attributable to Drilling and Evaluation and $10 million attributable to Corporate and other. December 31 Millions of dollars 2018 2017 Total assets: Completion and Production (a) $ 13,231 $ 12,276 Drilling and Evaluation (a) 8,037 7,837 Corporate and shared assets (b) 4,714 4,972 Total $ 25,982 $ 25,085 (a) Assets associated with specific segments primarily include receivables, inventories, certain identified property, plant and equipment (including field service equipment), equity in and advances to related companies and goodwill. (b) Corporate and other shared assets primarily include cash and equivalents and deferred tax assets. Operations by geographic region The following tables present information by geographic area. In 2018 , 2017 and 2016 , based on the location of services provided and products sold, 58% , 53% and 41% of our consolidated revenue was from the United States. As of December 31, 2018 and December 31, 2017 , 62% and 56% of our property, plant and equipment was located in the United States. No other country accounted for more than 10% of our revenue or property, plant and equipment during the periods presented. Year Ended December 31 Millions of dollars 2018 2017 2016 Revenue: North America $ 14,431 $ 11,564 $ 6,770 Latin America 2,065 2,116 1,860 Europe/Africa/CIS 2,945 2,781 2,993 Middle East/Asia 4,554 4,159 4,264 Total $ 23,995 $ 20,620 $ 15,887 December 31 Millions of dollars 2018 2017 Net property, plant and equipment: North America $ 5,672 $ 4,922 Latin America 974 945 Europe/Africa/CIS 938 1,098 Middle East/Asia 1,377 1,556 Total $ 8,961 $ 8,521

Revenue (Notes)

Revenue (Notes)	12 Months Ended
	Dec. 31, 2018
Revenue [Abstract]
Revenue	Revenue Changes in accounting policies Effective January 1, 2018, we adopted a comprehensive new revenue recognition standard. 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 a modified retrospective method; accordingly, the comparative information for the years ended December 31, 2017 and December 31, 2016 has not been adjusted and continues to be reported under the previous revenue standard. The adoption of this standard did not have a material impact to our consolidated financial position, reported revenue, results of operations or cash flows as of and for the year ended December 31, 2018 . See Note 15 for additional information about the new accounting standard. Under the new standard, revenue recognition is based on the transfer of control, or our customer’s 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. Determining the transaction price may require significant judgment, which includes identifying performance obligations in the contract, determining whether promised services can be distinguished in the context of the contract, and estimating the amount of variable consideration to include in the transaction price. We also assess our customer’s ability and intention to pay, which is based on a variety of factors including our customer’s historical payment experience and financial condition. Payment terms and conditions vary by contract type, although terms generally include a requirement of payment within 20 days 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. In 2018 , 2017 and 2016 , based on the location of services provided and products sold, 58% , 53% and 41% , respectively, of our consolidated revenue was from the United States. 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 2018 2017 2016 Revenue by division: Completion and Production $ 15,973 $ 13,077 $ 8,882 Drilling and Evaluation 8,022 7,543 7,005 Total revenue $ 23,995 $ 20,620 $ 15,887 Revenue by geographic region: North America $ 14,431 $ 11,564 $ 6,770 Latin America 2,065 2,116 1,860 Europe/Africa/CIS 2,945 2,781 2,993 Middle East/Asia 4,554 4,159 4,264 Total revenue $ 23,995 $ 20,620 $ 15,887 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

Receivables

Receivables	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Receivables	Receivables As of December 31, 2018 , 43% of our net trade receivables were from customers in the United States. As of December 31, 2017 , 42% 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 a high degree of 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. Venezuela . During the first quarter of 2018, the Venezuelan government announced that it changed the existing dual-rate foreign currency exchange system by eliminating the DIPRO foreign exchange rate, which was 10 Bolívares per United States dollar, and that all future currency transactions would be carried out at the DICOM floating rate, which was approximately 50,000 Bolívares per United States dollar at March 31, 2018. Additionally, the U.S. government issued guidance on sanctions against Venezuela during the quarter. These events, combined with continued deteriorating political and economic conditions in Venezuela and ongoing delayed payments on existing accounts receivable with customers in the country, created significant uncertainties regarding the recoverability of our investment. As such, we determined it was appropriate to write down all of our remaining investment in Venezuela during the first quarter of 2018, which resulted in a $312 million charge, net of tax. This consisted of $119 million of allowance for doubtful accounts related to remaining accounts receivable, a $32 million write-off of our promissory note from our primary customer in Venezuela, and write-offs of $48 million of inventory, $53 million of fixed assets and $13 million of other assets and liabilities, all of which were included within "Impairments and other charges" in our consolidated statements of operations, in addition to $47 million of accrued taxes recognized in our tax provision. We have maintained limited operations in Venezuela and have changed our accounting for revenue with all customers in the country to a cash basis, effective April 1, 2018, while carefully managing our exposure. The following table presents a rollforward of our global allowance for bad debts for 2016 , 2017 and 2018 . Millions of dollars Balance at Beginning of Period Provision (a) Balance at End of Period Year ended December 31, 2016 $ 145 $ 50 $ (20 ) $ 175 Year ended December 31, 2017 175 566 (16 ) 725 Year ended December 31, 2018 725 57 (44 ) 738 (a) Represents increases to allowance for bad debts charged to costs and expenses, net of recoveries.

Inventories

Inventories	12 Months Ended
	Dec. 31, 2018
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories are stated at the lower of cost and net realizable value. In the United States, we manufacture certain finished products and parts inventories for drill bits, completion products, bulk materials and other tools that are recorded using the last-in, first-out method, which totaled $186 million at December 31, 2018 and $177 million at December 31, 2017 . If the average cost method had been used, total inventories would have been $24 million higher than reported as of December 31, 2018 and $31 million higher as of December 31, 2017 . The cost of the remaining inventory was recorded using the average cost method. Inventories consisted of the following: December 31 Millions of dollars 2018 2017 Finished products and parts $ 1,947 $ 1,547 Raw materials and supplies 934 703 Work in process 147 146 Total $ 3,028 $ 2,396 All amounts in the table above are reported net of obsolescence reserves of $219 million at December 31, 2018 and $276 million at December 31, 2017

Property, Plant, and Equipment

Property, Plant, and Equipment	12 Months Ended
	Dec. 31, 2018
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 2018 2017 Land $ 252 $ 248 Buildings and property improvements 3,461 3,460 Machinery, equipment and other 18,430 17,062 Total 22,143 20,770 Less accumulated depreciation 13,182 12,249 Net property, plant and equipment $ 8,961 $ 8,521 Classes of assets are depreciated over the following useful lives: Buildings and Property 2018 2017 1 - 10 years 11% 11% 11 - 20 years 42% 42% 21 - 30 years 23% 22% 31 - 40 years 25% 25% Machinery, Equipment 2018 2017 1 - 5 years 34% 35% 6 - 10 years 56% 56% 11 - 20 years 10% 9%

Debt

Debt	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Debt	Debt Our total debt, including short-term borrowings and current maturities of long-term debt, consisted of the following: December 31 Millions of dollars 2018 2017 5.0% senior notes due November 2045 $ 2,000 $ 2,000 3.8% senior notes due November 2025 2,000 2,000 3.5% senior notes due August 2023 1,100 1,100 4.85% senior notes due November 2035 1,000 1,000 7.45% senior notes due September 2039 1,000 1,000 4.75% senior notes due August 2043 900 900 6.7% senior notes due September 2038 800 800 3.25% senior notes due November 2021 500 500 4.5% senior notes due November 2041 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 2.0% senior notes due August 2018 — 400 Other 160 251 Unamortized debt issuance costs and discounts (92 ) (98 ) Total 10,457 10,942 Short-term borrowings and current maturities of long-term debt (36 ) (512 ) Total long-term debt $ 10,421 $ 10,430 Senior debt All of our senior notes and debentures rank equally with our existing and future senior unsecured indebtedness, have semiannual interest payments and have no sinking fund requirements. 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. Our 7.60% and 8.75% senior debentures may not be redeemed prior to maturity . During 2018, we repaid $400 million of 2.0% senior notes, which matured in August 2018. Revolving credit facilities We have a revolving credit facility with a capacity of $3.0 billion , which expires in July 2020. The facility is for working capital or general corporate purposes. The full amount of the revolving credit facility was available as of December 31, 2018 . Debt maturities Our long-term debt matures as follows: $34 million in 2019 , $27 million in 2020 , $696 million in 2021 , $12 million in 2022 , $1.1 billion in 2023 and the remainder in 2024

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Securities and related litigation Commencing in June 2002, a number of class action lawsuits were filed against us in federal court alleging violations of the federal securities laws arising out of our change in accounting for revenue on long-term construction projects, our 1998 acquisition of Dresser Industries, Inc. and our reserves for asbestos liability exposure. In December 2016, we reached an agreement to settle these lawsuits and in July 2017, the district court issued final approval of the settlement. The settlement resolves all pending cases other than Magruder v. Halliburton Co., et. al. (the Magruder case). The allegations in the Magruder case arise out of the same general events described above, but for a later class period, December 8, 2001 to May 28, 2002. There has been limited activity in the Magruder case. In March 2009, our motion to dismiss was granted, with leave to replead. In March 2012, plaintiffs filed an amended complaint and in May 2012, we filed a motion to dismiss. That motion was granted in May 2018, with leave to replead some of the claims. An amended complaint was filed in June 2018 and we filed another motion to dismiss which remains pending. We cannot predict the outcome or consequences of this case, which we intend to vigorously defend. Environmental We are subject to numerous environmental, legal and regulatory requirements related to our operations worldwide. In the United States, these laws and regulations include, among others: - the Comprehensive Environmental Response, Compensation and Liability Act; - the Resource Conservation and Recovery Act; - the Clean Air Act; - the Federal Water Pollution Control Act; - the Toxic Substances Control Act; and - the Oil Pollution Act. In addition to the federal laws and regulations, states and other countries where we do business often have numerous environmental, legal and regulatory requirements by which we must abide. We evaluate and address the environmental impact of our operations by assessing and remediating contaminated properties in order to avoid future liabilities and comply with environmental, legal and regulatory requirements. Our Health, Safety and Environment group has several programs in place to maintain environmental leadership and to help prevent the occurrence of environmental contamination. On occasion, we are involved in environmental litigation and claims, including the remediation of properties we own or have operated, as well as efforts to meet or correct compliance-related matters. We do not expect costs related to those claims and remediation requirements to have a material adverse effect on our liquidity, consolidated results of operations, or consolidated financial position. Our accrued liabilities for environmental matters were $42 million as of December 31, 2018 and $48 million as of December 31, 2017 . Because our estimated liability is typically within a range and our accrued liability may be the amount on the low end of that range, our actual liability could eventually be well in excess of the amount accrued. Our total liability related to environmental matters covers numerous properties. Additionally, we have subsidiaries that have been named as potentially responsible parties along with other third parties for eight federal and state Superfund sites for which we have established reserves. As of December 31, 2018 , those eight sites accounted for approximately $9 million of our $42 million total environmental reserve. Despite attempts to resolve these Superfund matters, the relevant regulatory agency may at any time bring suit against us for amounts in excess of the amount accrued. With respect to some Superfund sites, we have been named a potentially responsible party by a regulatory agency; however, in each of those cases, we do not believe we have any material liability. We also could be subject to third-party claims with respect to environmental matters for which we have been named as a potentially responsible party. Guarantee arrangements In the normal course of business, we have agreements with financial institutions under which approximately $2.0 billion of letters of credit, bank guarantees, or surety bonds were outstanding as of December 31, 2018 . 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. Leases We are party to numerous operating leases, primarily related to real estate, transportation and equipment. Total rentals on our operating leases, net of sublease rentals, were $680 million in 2018 , $574 million in 2017 and $587 million in 2016 . Future total rentals on our noncancellable operating leases are $975 million in the aggregate, which includes the following: $275 million in 2019 ; $146 million in 2020 ; $122 million in 2021 ; $100 million in 2022 ; $78 million in 2023 ; and $254 million

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The components of the benefit (provision) for income taxes on continuing operations were: Year Ended December 31 Millions of dollars 2018 2017 2016 Current income taxes: Federal $ 19 $ 40 $ 737 Foreign (428 ) (423 ) (415 ) State (15 ) (14 ) 35 Total current (424 ) (397 ) 357 Deferred income taxes: Federal 286 (678 ) 1,343 Foreign 9 (31 ) 77 State (28 ) (25 ) 81 Total deferred 267 (734 ) 1,501 Income tax benefit (provision) $ (157 ) $ (1,131 ) $ 1,858 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 2018 2017 2016 United States $ 1,097 $ 694 $ (6,636 ) Foreign 717 (12 ) (989 ) Total $ 1,814 $ 682 $ (7,625 ) Reconciliations between the actual provision 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 2018 2017 2016 United States statutory rate 21.0 % 35.0 % 35.0 % Valuation allowance against tax assets (16.2 ) (6.2 ) (2.1 ) Venezuela adjustment 5.7 36.6 — Impact of foreign income taxed at different rates (3.0 ) (18.3 ) (3.2 ) Impact of U.S. tax reform (2.6 ) 113.0 — Adjustments of prior year taxes 2.0 (2.3 ) 0.2 State income taxes 1.9 1.7 1.0 Undistributed foreign earnings — 3.8 (5.1 ) Domestic manufacturing deduction — — (1.3 ) Non-deductible acquisition costs — — 0.6 Other items, net (0.1 ) 2.5 (0.7 ) Total effective tax rate on continuing operations 8.7 % 165.8 % 24.4 % Our effective tax rate on continuing operations was 8.7% for 2018 , 165.8% for 2017 and 24.4% for 2016 . For the year ended December 31, 2018 , we had the following significant items impacting our effective tax rate: – during the fourth quarter of 2018, we recognized the impact of a strategic change in the Company’s corporate structure, which resulted in a net tax benefit of $306 million ; – we wrote down all of our remaining investment in Venezuela during the first quarter of 2018. As a result, we recognized a pre-tax charge of $265 million , which was not tax-deductible, coupled with $47 million of additional accrued local Venezuela taxes in our tax provision. See Note 4 to the consolidated financial statements for further information; – we completed our analysis in the fourth quarter of 2018 on the impact of the United States tax reform enacted in 2017 and made an adjustment to the provisional estimate we previously recorded. As a result, we recognized $47 million of additional tax benefits, primarily related to the remeasurement of deferred taxes and an adjustment to mandatory deemed repatriation; and – we recognized income in our foreign operations in which the corresponding tax expenses are applied at lower statutory rates in certain jurisdictions. The primary components of our deferred tax assets and liabilities were as follows: December 31 Millions of dollars 2018 2017 Gross deferred tax assets: Net operating loss carryforwards $ 1,466 $ 1,370 Foreign tax credit carryforwards 728 828 Employee compensation and benefits 242 263 Accrued liabilities 101 97 Other 404 416 Total gross deferred tax assets 2,941 2,974 Gross deferred tax liabilities: Depreciation and amortization 635 315 Undistributed foreign earnings 2 242 Other 64 56 Total gross deferred tax liabilities 701 613 Valuation allowances 913 1,173 Net deferred income tax asset $ 1,327 $ 1,188 At December 31, 2018 , we had $1.5 billion of domestic and foreign tax-effected net operating loss carryforwards. The ultimate realization of these deferred tax assets depends on the ability to generate sufficient taxable income in the appropriate taxing jurisdiction. $168 million of the net operating loss carryforwards will expire after taxable years ended from 2019 through 2023 , $ 180 million will expire after taxable years ended from 2024 through 2028 , and $ 786 million will expire after taxable years ended from 2029 through 2039 . The remaining balance will not expire. Additionally, we had $805 million of foreign tax credit carryforwards that will expire from 2024 through 2028 , which are offset by foreign branch deferred activity reflected in the above table, along with $138 million of research and development tax credit carryforwards that will expire from 2029 through 2039 . 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, 2018. 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, 2016 $ 322 $ 47 Change in prior year tax positions 44 20 Change in current year tax positions 129 3 Cash settlements with taxing authorities (62 ) (8 ) Lapse of statute of limitations (6 ) (1 ) Balance at December 31, 2016 $ 427 $ 61 Change in prior year tax positions (108 ) — Change in current year tax positions 24 2 Cash settlements with taxing authorities (6 ) — Lapse of statute of limitations (4 ) (3 ) Balance at December 31, 2017 $ 333 (a) $ 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 (a)(b) $ 67 (a) Includes $18 million as of December 31, 2018 and $9 million as of December 31, 2017 in foreign unrecognized tax benefits that would give rise to a United States tax credit. As of December 31, 2018 and December 31, 2017 , approximately $399 million and $319 million , 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 $21 million that could be resolved within the next 12 months.

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2018
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 2018 2017 Issued 1,069 1,069 In treasury (198 ) (196 ) Total shares of common stock outstanding 871 873 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, 2018 we repurchased approximately 10.5 million shares of our common stock for a total cost of $400 million . There were no repurchases made under the program during the year ended December 31, 2017 . Approximately $5.3 billion remained authorized for repurchases as of December 31, 2018 . From the inception of this program in February 2006 through December 31, 2018 , we repurchased approximately 212 million shares of our common stock for a total cost of approximately $8.8 billion . Preferred stock Our preferred stock consists of five million total authorized shares at December 31, 2018 , of which none are issued. Accumulated other comprehensive loss Accumulated other comprehensive loss consisted of the following: December 31 Millions of dollars 2018 2017 Defined benefit and other postretirement liability adjustments (a) $ (203 ) $ (334 ) Cumulative translation adjustment (82 ) (80 ) Other (70 ) (55 ) Total accumulated other comprehensive loss $ (355 ) $ (469 ) (a) Included net actuarial losses for our international pension plans of $184 million at December 31, 2018 and $295 million at December 31, 2017

Stock-based Compensation

Stock-based Compensation	12 Months Ended
	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	Stock-based Compensation The following table summarizes stock-based compensation costs for the years ended December 31, 2018 , 2017 and 2016 . Year Ended December 31 Millions of dollars 2018 2017 2016 Stock-based compensation cost $ 274 $ 290 $ 262 Tax benefit (51 ) (64 ) (77 ) Stock-based compensation cost, net of tax $ 223 $ 226 $ 185 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 206 million shares of common stock have been reserved for issuance to employees and non-employee directors. At December 31, 2018 , approximately 11 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 our Restricted Stock Plan for Non-Employee Directors and our 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 2018 . Number Weighted Weighted Aggregate Outstanding at January 1, 2018 20.9 $ 44.92 Granted 3.0 46.39 Exercised (2.2 ) 40.34 Forfeited/expired (0.7 ) 49.44 Outstanding at December 31, 2018 21.0 $ 45.44 6.1 $ 2 Exercisable at December 31, 2018 15.6 $ 45.28 5.1 $ 2 The total intrinsic value of options exercised was $25 million in 2018 , $21 million in 2017 and $25 million in 2016 . As of December 31, 2018 , there was $41 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 $195 million during 2018 , $158 million during 2017 and $186 million during 2016 , of which $88 million , $53 million and $80 million related to proceeds from exercises of stock options in 2018 , 2017 and 2016 , 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 2018 2017 2016 Expected term (in years) 5.27 5.24 5.21 Expected volatility 28% 32% 37% Expected dividend yield 1.37 - 2.29% 1.28 - 1.72% 1.35 - 2.46% Risk-free interest rate 2.27 - 2.84% 1.79 - 2.14% 1.13 - 1.84% Weighted average grant-date fair value per share $11.56 $13.11 $12.33 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. The following table represents our restricted stock awards and restricted stock units granted, vested and forfeited during 2018 . Number of Shares Weighted Average Nonvested shares at January 1, 2018 15.1 $ 45.42 Granted 4.9 47.43 Vested (4.8 ) 45.24 Forfeited (0.8 ) 46.62 Nonvested shares at December 31, 2018 14.4 $ 46.01 The weighted average grant-date fair value of shares granted was $47.43 during 2018 , $45.99 during 2017 and $42.87 during 2016 . The total fair value of shares vested was $219 million during 2018 , $204 million during 2017 , and $223 million during 2016 . As of December 31, 2018 , there was $433 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 85% 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 this plan, 74 million shares of common stock have been reserved for issuance. The stock to be offered may be authorized but unissued common shares or treasury shares. As of December 31, 2018 , 49 million shares have been sold through the ESPP since the inception of the plan and 25 million shares are available for future issuance. 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 2018 2017 2016 Expected volatility 25 % 29 % 36 % Expected dividend yield 1.62 % 1.51 % 1.87 % Risk-free interest rate 1.92 % 0.86 % 0.25 % Weighted average grant-date fair value per share $ 8.86 $ 9.95 $ 8.61

Income per Share

Income per Share	12 Months Ended
	Dec. 31, 2018
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 2018 2017 2016 Basic weighted average common shares outstanding 875 870 861 Dilutive effect of awards granted under our stock incentive plans 2 — — Diluted weighted average common shares outstanding 877 870 861 Antidilutive shares: Options with exercise price greater than the average market price 14 6 11 Options which are antidilutive due to net loss position — 2 1 Total antidilutive shares 14 8 12

Financial Instruments and Risk

Financial Instruments and Risk Management	12 Months Ended
	Dec. 31, 2018
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, 2018 December 31, 2017 Millions of dollars Level 1 Level 2 Total fair value Carrying value Level 1 Level 2 Total fair value Carrying value Total debt $ 6,726 $ 4,150 $ 10,876 $ 10,457 $ 3,285 $ 9,172 $ 12,457 $ 10,942 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, 2018 or December 31, 2017 . 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 $591 million at December 31, 2018 and $633 million at December 31, 2017 . 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, 2018 and December 31, 2017 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 $10.4 billion at both December 31, 2018 and December 31, 2017 . 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, 2018 , 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, 2018 and December 31, 2017 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, 2018 , 43% of our net trade receivables were from customers in the United States. As of December 31, 2017 , 42% of our net trade receivables were from customers in the United States. We maintain an allowance for bad debts based upon several factors, including historical collection experience, current aging status of the customer accounts and financial condition of our customers. See Note 4 for further information.

Retirement Plans

Retirement Plans	12 Months Ended
	Dec. 31, 2018
Retirement Benefits [Abstract]
Pension and Other Postretirement Benefits Disclosure [Text Block]	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 pretax income and/or discretionary amounts determined on an annual basis. Our expense for the defined contribution plans for continuing operations totaled $193 million in 2018 , $173 million in 2017 and $111 million in 2016 . The increase in 2018 resulted from an increase in the domestic and international workforce. - 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, 2018 , the projected benefit obligation was $951 million and the fair value of plan assets was $832 million , which resulted in an unfunded obligation of $119 million . At December 31, 2017 , the projected benefit obligation was $1.2 billion and the fair value of plan assets was $940 million , which resulted in an unfunded obligation of $280 million . The accumulated benefit obligation for our international plans was $878 million at December 31, 2018 and $1.2 billion at December 31, 2017. The following table presents additional information about our international pension plans. December 31 Millions of dollars 2018 2017 Amounts recognized on the Consolidated Balance Sheets Other Assets $ 39 $ 2 Accrued employee compensation and benefits 8 15 Employee compensation and benefits 150 267 Pension plans in which projected benefit obligation exceeded plan assets Projected benefit obligation (a) $ 176 $ 1,202 Fair value of plan assets 18 920 Pension plans in which accumulated benefit obligation exceeded plan assets Accumulated benefit obligation (a) $ 105 $ 1,139 Fair value of plan assets 18 920 (a) Our United Kingdom pension plan was underfunded as of December 31, 2017 and overfunded as of December 31, 2018. As such, the fair value of plan assets and projected and accumulated benefit obligation related to this plan are no longer captured in this table at December 31, 2018. 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 Total Cash and equivalents $ — $ 12 $ — $ 12 Common/collective trust funds (a) Equity funds (b) — 137 — 137 Bond funds (c) — 302 21 323 Alternatives funds (d) — 209 — 209 Real estate funds (e) — 81 28 109 Other assets 6 21 15 42 Fair value of plan assets at December 31, 2018 $ 6 $ 762 $ 64 $ 832 Cash and equivalents $ — $ 11 $ — $ 11 Common/collective trust funds (a) Equity funds (b) — 204 — 204 Bond funds (c) — 323 46 369 Alternatives fund (d) — 184 — 184 Real estate funds (e) — 98 28 126 Other assets 7 22 17 46 Fair value of plan assets at December 31, 2017 $ 7 $ 842 $ 91 $ 940 (a) Common/collective trust funds are valued at the net asset value of units held by the plans at year-end. (b) Strategy is to invest in diversified funds of global common stocks. (c) Strategy is to invest in diversified funds of fixed income securities of varying geographies and credit quality and whose cash flows approximate the maturities of the benefit obligation. (d) Strategy is to invest in a fund of diversifying investments, including but not limited to reinsurance, commodities and currencies. (e) Strategy is to invest in diversified funds of real estate investment trusts and private real estate. Our investment strategy varies by country depending on the circumstances of the underlying plan. Risk management practices 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 80% of our international pension plans’ projected benefit obligation at December 31, 2018 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 maturities of the obligation. Net periodic benefit cost Net periodic benefit cost for our international pension plans was $32 million in 2018 , $30 million in 2017 and $30 million in 2016 . Included in net periodic benefit cost were $8 million in 2018 and $13 million in 2017 of net curtailment and settlement cost arising from reductions in workforce and an increase in lump sum payments made during these years. Actuarial assumptions Certain weighted-average actuarial assumptions used to determine benefit obligations of our international pension plans at December 31 were as follows: 2018 2017 Discount rate 3.3% 2.8% Rate of compensation increase 5.8% 5.5% 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: 2018 2017 2016 Discount rate 2.8% 2.9% 4.2% Expected long-term return on plan assets 4.1% 4.2% 5.3% Rate of compensation increase 5.5% 4.8% 5.4% 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 $16 million to our international pension plans in 2019 . Benefit payments. Expected benefit payments over the next 10 years for our international pension plans are as follows: $ 57 million in 2019 , $ 55 million in 2020 , $ 59 million in 2021 , $ 64 million in 2022 , $ 66 million in 2023 and $ 386 million in years 2024 through 2028

New Accounting Pronouncements (

New Accounting Pronouncements (Notes)	12 Months Ended
	Dec. 31, 2018
New Accounting Pronouncements [Abstract]
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]	New Accounting Pronouncements Standards adopted in 2018 Revenue Recognition On January 1, 2018, we adopted the comprehensive new revenue recognition standard issued by the Financial Accounting Standards Board (FASB). The core principle of the new standard is that a company should recognize revenue to depict the transfer of promised services or products to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those services or products. The standard creates a five step model that requires companies to exercise judgment when considering the terms of a contract and all relevant facts and circumstances. We adopted the new revenue recognition standard using a modified retrospective basis and applied the guidance to all contracts that were not completed as of January 1, 2018. This resulted in an immaterial cumulative-effect adjustment to retained earnings as of January 1, 2018. The comparative financial information has not been restated and continues to be reported under the revenue accounting standards in effect during those periods. The adoption of this standard did not have a material impact to our consolidated financial position, reported revenue, results of operations or cash flows as of and for the year ended December 31, 2018 . See Note 3 for our expanded revenue disclosures required by the new standard. Standards not yet adopted Leases In February 2016, the FASB issued an accounting standards update related to accounting for leases, which requires assets and liabilities that arise from all leases to be recognized on the balance sheet for lessees and expanded financial statement disclosures for both lessees and lessors. Currently, only capital leases are recorded on the balance sheet. This update will require lessees to recognize a lease liability equal to the present value of its lease payments and a right-of-use asset representing its right to use the underlying asset for the lease term for all leases longer than 12 months. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election by class of underlying asset not to recognize lease assets and liabilities and instead recognize lease expense for such leases generally on a straight-line basis over the lease term. Leases with a term of longer than 12 months will be classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the income statement. We adopted the new standard effective January 1, 2019 and intend to elect the modified retrospective transition method. As such, the comparative financial information will not be restated and will continue to be reported under the lease standard in effect during those periods. We also intend to elect other practical expedients provided by the new standard, including the package of practical expedients, the short-term lease recognition practical expedient in which leases with a term of 12 months or less will not be recognized on the balance sheet, and the practical expedient to not separate lease and non-lease components for the majority of our leases. We expect that the adoption of this standard will result in a range of approximately $1.0 billion to $1.2 billion

Description of Company and Si_2

Description of Company and Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
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.
Basis of presentation	Basis of presentationThe 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 recognition Effective January 1, 2018, we adopted a comprehensive new revenue recognition standard using a modified retrospective basis. The comparative information for the years ended December 31, 2017 and December 31, 2016 has not been adjusted and continues to be reported under the previous revenue standard, the accounting policies for which are discussed below. We also assess our customer’s ability and intention to pay, which is based on a variety of factors including our customer’s historical payment experience and financial condition. Payment terms and conditions vary by contract type, although terms generally include a requirement of payment within 20 days to 60 days
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 $390 million in 2018 , $360 million in 2017 and $329 million in 2016
Cash equivalents	Cash equivalents We consider all highly liquid investments with an original maturity of three months
Inventories	InventoriesInventories 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. Some domestic manufacturing and field service finished products and parts inventories for drill bits, completion products and bulk materials are recorded using the last-in, first-out method. The remaining inventory is recorded on the 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.Inventories are stated at the lower of cost and net realizable value.
Allowance for bad debts	Allowance for bad debtsWe establish an allowance for bad debts through a review of several factors, including historical collection experience, current aging status of the customer accounts and financial condition of our customers. Our policy is to write off bad debts when the customer accounts are determined to be uncollectible.
Property, plant and equipment	Property, plant and equipmentOther 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 used for tax purposes, wherever 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, 2016: $ 1,679 $ 735 $ 2,414 Current year acquisitions 249 36 285 Purchase price adjustments for previous acquisitions (6 ) — (6 ) Balance at December 31, 2017: $ 1,922 $ 771 $ 2,693 Current year acquisitions 99 6 105 Purchase price adjustments for previous acquisitions 34 (7 ) 27 Balance at December 31, 2018: $ 2,055 $ 770 $ 2,825 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, 2018 , 2017 and 2016 , 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 “ Management’s Discussion and Analysis of Financial Condition and Results of Operations – Critical Accounting Estimates.”
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
Impairment of long-lived assets	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 an asset classified as held for use, the estimated future undiscounted cash flows associated with the asset are compared to the asset’s carrying amount to determine if a write-down to fair value is required. 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.
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.
Foreign currency translations	Foreign currency translationForeign 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 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 11

Revenue (Policies)

Revenue (Policies)	12 Months Ended
	Dec. 31, 2018
Revenue [Abstract]
Revenue recognition	Revenue recognition Effective January 1, 2018, we adopted a comprehensive new revenue recognition standard using a modified retrospective basis. The comparative information for the years ended December 31, 2017 and December 31, 2016 has not been adjusted and continues to be reported under the previous revenue standard, the accounting policies for which are discussed below. We also assess our customer’s ability and intention to pay, which is based on a variety of factors including our customer’s historical payment experience and financial condition. Payment terms and conditions vary by contract type, although terms generally include a requirement of payment within 20 days to 60 days

Inventories (Policies)

Inventories (Policies)	12 Months Ended
	Dec. 31, 2018
Inventory Disclosure [Abstract]
Inventory, Policy	InventoriesInventories 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. Some domestic manufacturing and field service finished products and parts inventories for drill bits, completion products and bulk materials are recorded using the last-in, first-out method. The remaining inventory is recorded on the 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.Inventories are stated at the lower of cost and net realizable value.

Description of Company and Si_3

Description of Company and Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
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, 2016: $ 1,679 $ 735 $ 2,414 Current year acquisitions 249 36 285 Purchase price adjustments for previous acquisitions (6 ) — (6 ) Balance at December 31, 2017: $ 1,922 $ 771 $ 2,693 Current year acquisitions 99 6 105 Purchase price adjustments for previous acquisitions 34 (7 ) 27 Balance at December 31, 2018: $ 2,055 $ 770 $ 2,825

Business Segment and Geograph_2

Business Segment and Geographic Information (Tables)	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Information on business segments	The following tables present financial information on our business segments. Year Ended December 31 Millions of dollars 2018 2017 2016 Revenue: Completion and Production $ 15,973 $ 13,077 $ 8,882 Drilling and Evaluation 8,022 7,543 7,005 Total revenue $ 23,995 $ 20,620 $ 15,887 Operating income (loss): Completion and Production $ 2,278 $ 1,625 $ 108 Drilling and Evaluation 745 726 801 Total operations 3,023 2,351 909 Corporate and other (a) (291 ) (330 ) (4,322 ) Impairments and other charges (b) (265 ) (647 ) (3,357 ) Total operating income (loss) $ 2,467 $ 1,374 $ (6,770 ) Interest expense, net of interest income $ (554 ) $ (593 ) $ (639 ) Other, net (99 ) (99 ) (216 ) Income (loss) from continuing operations before income taxes $ 1,814 $ 682 $ (7,625 ) Capital expenditures: Completion and Production $ 1,364 $ 1,111 $ 500 Drilling and Evaluation 657 261 297 Corporate and other 5 1 1 Total $ 2,026 $ 1,373 $ 798 Depreciation, depletion and amortization: Completion and Production $ 1,058 $ 953 $ 900 Drilling and Evaluation 512 563 569 Corporate and other 36 40 34 Total $ 1,606 $ 1,556 $ 1,503 (a) Includes certain expenses not attributable to a particular business segment, such as costs related to support functions and corporate executives, and also includes amortization expense associated with intangible assets recorded as a result of acquisitions. Also includes merger-related costs and a termination fee during the year ended December 31, 2016. (b) Impairments and other charges are as follows: -For the year ended December 31, 2018, the aggregate charge of $265 million represents a write-down of all of our remaining investment in Venezuela, consisting of receivables, fixed assets, inventory and other assets and liabilities. -For the year ended December 31, 2017, the aggregate charge of $647 million represents a fair market value adjustment on our existing promissory note with our primary customer in Venezuela and a full reserve against our other accounts receivable with this customer. -For the year ended December 31, 2016, the aggregate charge of $3.4 billion consisted of fixed asset impairments and write-offs, inventory write-downs, impairments of intangible assets, severance costs, country and facility closures, and other charges related to the energy downturn. This included $2.1 billion attributable to Completion and Production, $1.2 billion attributable to Drilling and Evaluation and $10 million
Reconciliation of assets from segment to consolidated	December 31 Millions of dollars 2018 2017 Total assets: Completion and Production (a) $ 13,231 $ 12,276 Drilling and Evaluation (a) 8,037 7,837 Corporate and shared assets (b) 4,714 4,972 Total $ 25,982 $ 25,085 (a) Assets associated with specific segments primarily include receivables, inventories, certain identified property, plant and equipment (including field service equipment), equity in and advances to related companies and goodwill. (b) Corporate and other shared assets 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 2018 2017 2016 Revenue: North America $ 14,431 $ 11,564 $ 6,770 Latin America 2,065 2,116 1,860 Europe/Africa/CIS 2,945 2,781 2,993 Middle East/Asia 4,554 4,159 4,264 Total $ 23,995 $ 20,620 $ 15,887 December 31 Millions of dollars 2018 2017 Net property, plant and equipment: North America $ 5,672 $ 4,922 Latin America 974 945 Europe/Africa/CIS 938 1,098 Middle East/Asia 1,377 1,556 Total $ 8,961 $ 8,521

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Dec. 31, 2018
Revenue [Abstract]
Disaggregation of Revenue	The following table presents information on our disaggregated revenue. Year Ended December 31 Millions of dollars 2018 2017 2016 Revenue by division: Completion and Production $ 15,973 $ 13,077 $ 8,882 Drilling and Evaluation 8,022 7,543 7,005 Total revenue $ 23,995 $ 20,620 $ 15,887 Revenue by geographic region: North America $ 14,431 $ 11,564 $ 6,770 Latin America 2,065 2,116 1,860 Europe/Africa/CIS 2,945 2,781 2,993 Middle East/Asia 4,554 4,159 4,264 Total revenue $ 23,995 $ 20,620 $ 15,887

Receivables (Tables)

Receivables (Tables)	12 Months Ended
	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Credit Losses on Financing Receivables [Table Text Block]	The following table presents a rollforward of our global allowance for bad debts for 2016 , 2017 and 2018 . Millions of dollars Balance at Beginning of Period Provision (a) Balance at End of Period Year ended December 31, 2016 $ 145 $ 50 $ (20 ) $ 175 Year ended December 31, 2017 175 566 (16 ) 725 Year ended December 31, 2018 725 57 (44 ) 738 (a) Represents increases to allowance for bad debts charged to costs and expenses, net of recoveries.

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2018
Inventory Disclosure [Abstract]
Inventories	The cost of the remaining inventory was recorded using the average cost method. Inventories consisted of the following: December 31 Millions of dollars 2018 2017 Finished products and parts $ 1,947 $ 1,547 Raw materials and supplies 934 703 Work in process 147 146 Total $ 3,028 $ 2,396

Property, Plant, and Equipment

Property, Plant, and Equipment (Tables)	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Property, plant, and equipment	Property, plant and equipment were composed of the following: December 31 Millions of dollars 2018 2017 Land $ 252 $ 248 Buildings and property improvements 3,461 3,460 Machinery, equipment and other 18,430 17,062 Total 22,143 20,770 Less accumulated depreciation 13,182 12,249 Net property, plant and equipment $ 8,961 $ 8,521
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 2018 2017 1 - 10 years 11% 11% 11 - 20 years 42% 42% 21 - 30 years 23% 22% 31 - 40 years 25% 25% Machinery, Equipment 2018 2017 1 - 5 years 34% 35% 6 - 10 years 56% 56% 11 - 20 years 10% 9%

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2018
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 2018 2017 5.0% senior notes due November 2045 $ 2,000 $ 2,000 3.8% senior notes due November 2025 2,000 2,000 3.5% senior notes due August 2023 1,100 1,100 4.85% senior notes due November 2035 1,000 1,000 7.45% senior notes due September 2039 1,000 1,000 4.75% senior notes due August 2043 900 900 6.7% senior notes due September 2038 800 800 3.25% senior notes due November 2021 500 500 4.5% senior notes due November 2041 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 2.0% senior notes due August 2018 — 400 Other 160 251 Unamortized debt issuance costs and discounts (92 ) (98 ) Total 10,457 10,942 Short-term borrowings and current maturities of long-term debt (36 ) (512 ) Total long-term debt $ 10,421 $ 10,430

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Components of the (provision)/benefit for income taxes on continuing operations	The components of the benefit (provision) for income taxes on continuing operations were: Year Ended December 31 Millions of dollars 2018 2017 2016 Current income taxes: Federal $ 19 $ 40 $ 737 Foreign (428 ) (423 ) (415 ) State (15 ) (14 ) 35 Total current (424 ) (397 ) 357 Deferred income taxes: Federal 286 (678 ) 1,343 Foreign 9 (31 ) 77 State (28 ) (25 ) 81 Total deferred 267 (734 ) 1,501 Income tax benefit (provision) $ (157 ) $ (1,131 ) $ 1,858
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 2018 2017 2016 United States $ 1,097 $ 694 $ (6,636 ) Foreign 717 (12 ) (989 ) Total $ 1,814 $ 682 $ (7,625 )
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 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 2018 2017 2016 United States statutory rate 21.0 % 35.0 % 35.0 % Valuation allowance against tax assets (16.2 ) (6.2 ) (2.1 ) Venezuela adjustment 5.7 36.6 — Impact of foreign income taxed at different rates (3.0 ) (18.3 ) (3.2 ) Impact of U.S. tax reform (2.6 ) 113.0 — Adjustments of prior year taxes 2.0 (2.3 ) 0.2 State income taxes 1.9 1.7 1.0 Undistributed foreign earnings — 3.8 (5.1 ) Domestic manufacturing deduction — — (1.3 ) Non-deductible acquisition costs — — 0.6 Other items, net (0.1 ) 2.5 (0.7 ) Total effective tax rate on continuing operations 8.7 % 165.8 % 24.4 %
Primary components of deferred tax assets and liabilities	The primary components of our deferred tax assets and liabilities were as follows: December 31 Millions of dollars 2018 2017 Gross deferred tax assets: Net operating loss carryforwards $ 1,466 $ 1,370 Foreign tax credit carryforwards 728 828 Employee compensation and benefits 242 263 Accrued liabilities 101 97 Other 404 416 Total gross deferred tax assets 2,941 2,974 Gross deferred tax liabilities: Depreciation and amortization 635 315 Undistributed foreign earnings 2 242 Other 64 56 Total gross deferred tax liabilities 701 613 Valuation allowances 913 1,173 Net deferred income tax asset $ 1,327 $ 1,188
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, 2016 $ 322 $ 47 Change in prior year tax positions 44 20 Change in current year tax positions 129 3 Cash settlements with taxing authorities (62 ) (8 ) Lapse of statute of limitations (6 ) (1 ) Balance at December 31, 2016 $ 427 $ 61 Change in prior year tax positions (108 ) — Change in current year tax positions 24 2 Cash settlements with taxing authorities (6 ) — Lapse of statute of limitations (4 ) (3 ) Balance at December 31, 2017 $ 333 (a) $ 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 (a)(b) $ 67 (a) Includes $18 million as of December 31, 2018 and $9 million as of December 31, 2017 in foreign unrecognized tax benefits that would give rise to a United States tax credit. As of December 31, 2018 and December 31, 2017 , approximately $399 million and $319 million , 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 $21 million

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2018
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 2018 2017 Issued 1,069 1,069 In treasury (198 ) (196 ) Total shares of common stock outstanding 871 873
Schedule of accumulated other comprehensive income (loss)	Accumulated other comprehensive loss consisted of the following: December 31 Millions of dollars 2018 2017 Defined benefit and other postretirement liability adjustments (a) $ (203 ) $ (334 ) Cumulative translation adjustment (82 ) (80 ) Other (70 ) (55 ) Total accumulated other comprehensive loss $ (355 ) $ (469 ) (a) Included net actuarial losses for our international pension plans of $184 million at December 31, 2018 and $295 million at December 31, 2017

Stock-based Compensation (Table

Stock-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]	The following table summarizes stock-based compensation costs for the years ended December 31, 2018 , 2017 and 2016 . Year Ended December 31 Millions of dollars 2018 2017 2016 Stock-based compensation cost $ 274 $ 290 $ 262 Tax benefit (51 ) (64 ) (77 ) Stock-based compensation cost, net of tax $ 223 $ 226 $ 185
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation, Stock Options, Activity [Table Text Block]	The following table represents our stock options activity during 2018 . Number Weighted Weighted Aggregate Outstanding at January 1, 2018 20.9 $ 44.92 Granted 3.0 46.39 Exercised (2.2 ) 40.34 Forfeited/expired (0.7 ) 49.44 Outstanding at December 31, 2018 21.0 $ 45.44 6.1 $ 2 Exercisable at December 31, 2018 15.6 $ 45.28 5.1 $ 2
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	The assumptions and resulting fair values of options granted were as follows: Year Ended December 31 2018 2017 2016 Expected term (in years) 5.27 5.24 5.21 Expected volatility 28% 32% 37% Expected dividend yield 1.37 - 2.29% 1.28 - 1.72% 1.35 - 2.46% Risk-free interest rate 2.27 - 2.84% 1.79 - 2.14% 1.13 - 1.84% Weighted average grant-date fair value per share $11.56 $13.11 $12.33
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	The following table represents our restricted stock awards and restricted stock units granted, vested and forfeited during 2018 . Number of Shares Weighted Average Nonvested shares at January 1, 2018 15.1 $ 45.42 Granted 4.9 47.43 Vested (4.8 ) 45.24 Forfeited (0.8 ) 46.62 Nonvested shares at December 31, 2018 14.4 $ 46.01
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	The assumptions and resulting fair values were as follows: Year Ended December 31 2018 2017 2016 Expected volatility 25 % 29 % 36 % Expected dividend yield 1.62 % 1.51 % 1.87 % Risk-free interest rate 1.92 % 0.86 % 0.25 % Weighted average grant-date fair value per share $ 8.86 $ 9.95 $ 8.61

Income per Share Income per Sha

Income per Share Income per Share (Tables)	12 Months Ended
	Dec. 31, 2018
Weighted average shares outstanding and antidilutive shares [Line Items]
Weighted average shares outstanding and antidilutive shares [Table Text Block]	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 2018 2017 2016 Basic weighted average common shares outstanding 875 870 861 Dilutive effect of awards granted under our stock incentive plans 2 — — Diluted weighted average common shares outstanding 877 870 861 Antidilutive shares: Options with exercise price greater than the average market price 14 6 11 Options which are antidilutive due to net loss position — 2 1 Total antidilutive shares 14 8 12

Financial Instruments and Ris_2

Financial Instruments and Risk Management (Tables)	12 Months Ended
	Dec. 31, 2018
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, 2018 December 31, 2017 Millions of dollars Level 1 Level 2 Total fair value Carrying value Level 1 Level 2 Total fair value Carrying value Total debt $ 6,726 $ 4,150 $ 10,876 $ 10,457 $ 3,285 $ 9,172 $ 12,457 $ 10,942

Retirement Plans (Tables)

Retirement Plans (Tables)	12 Months Ended
	Dec. 31, 2018
Retirement Benefits [Abstract]
Schedule of Net Benefit Costs [Table Text Block]	The following table presents additional information about our international pension plans. December 31 Millions of dollars 2018 2017 Amounts recognized on the Consolidated Balance Sheets Other Assets $ 39 $ 2 Accrued employee compensation and benefits 8 15 Employee compensation and benefits 150 267 Pension plans in which projected benefit obligation exceeded plan assets Projected benefit obligation (a) $ 176 $ 1,202 Fair value of plan assets 18 920 Pension plans in which accumulated benefit obligation exceeded plan assets Accumulated benefit obligation (a) $ 105 $ 1,139 Fair value of plan assets 18 920
Schedule of Allocation of Plan Assets [Table Text Block]	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 Total Cash and equivalents $ — $ 12 $ — $ 12 Common/collective trust funds (a) Equity funds (b) — 137 — 137 Bond funds (c) — 302 21 323 Alternatives funds (d) — 209 — 209 Real estate funds (e) — 81 28 109 Other assets 6 21 15 42 Fair value of plan assets at December 31, 2018 $ 6 $ 762 $ 64 $ 832 Cash and equivalents $ — $ 11 $ — $ 11 Common/collective trust funds (a) Equity funds (b) — 204 — 204 Bond funds (c) — 323 46 369 Alternatives fund (d) — 184 — 184 Real estate funds (e) — 98 28 126 Other assets 7 22 17 46 Fair value of plan assets at December 31, 2017 $ 7 $ 842 $ 91 $ 940 (a) Common/collective trust funds are valued at the net asset value of units held by the plans at year-end. (b) Strategy is to invest in diversified funds of global common stocks. (c) Strategy is to invest in diversified funds of fixed income securities of varying geographies and credit quality and whose cash flows approximate the maturities of the benefit obligation. (d) Strategy is to invest in a fund of diversifying investments, including but not limited to reinsurance, commodities and currencies.
Schedule of Assumptions Used [Table Text Block]	Certain weighted-average actuarial assumptions used to determine benefit obligations of our international pension plans at December 31 were as follows: 2018 2017 Discount rate 3.3% 2.8% Rate of compensation increase 5.8% 5.5% 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: 2018 2017 2016 Discount rate 2.8% 2.9% 4.2% Expected long-term return on plan assets 4.1% 4.2% 5.3% Rate of compensation increase 5.5% 4.8% 5.4%

Description of Company and Si_4

Description of Company and Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2018USD ($)Division	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of business segments | Division	2
Goodwill [Line Items]
Goodwill, Impairment Loss	$ 0	$ 0	$ 0
Research and Development [Abstract]
Research and development costs	$ 390,000,000	360,000,000	329,000,000
Cash and Cash Equivalents [Abstract]
Cash equivalents, maximum maturity (in months)	3 months
Goodwill [Roll Forward]
Goodwill	$ 2,693,000,000	2,414,000,000
Current year acquisitions	105,000,000	285,000,000
Purchase price adjustments for previous acquisitions	27,000,000	(6,000,000)
Goodwill	$ 2,825,000,000	2,693,000,000	2,414,000,000
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	$ 1,922,000,000	1,679,000,000
Current year acquisitions	99,000,000	249,000,000
Purchase price adjustments for previous acquisitions	34,000,000	(6,000,000)
Goodwill	2,055,000,000	1,922,000,000	1,679,000,000
Drilling and Evaluation
Goodwill [Roll Forward]
Goodwill	771,000,000	735,000,000
Current year acquisitions	6,000,000	36,000,000
Purchase price adjustments for previous acquisitions	(7,000,000)	0
Goodwill	$ 770,000,000	$ 771,000,000	$ 735,000,000

Business Segment and Geograph_3

Business Segment and Geographic Information (Narrative) (Details)	12 Months Ended
	Dec. 31, 2018DivisionCountries	Dec. 31, 2017Countries	Dec. 31, 2016Countries
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	1	1	1
Number of Countries Exceed Property Plant and Equipment Threshold	1	1
Property, Plant and Equipment [Member] | UNITED STATES
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	62.00%	56.00%
Sales Revenue, Net [Member] | UNITED STATES
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	58.00%	53.00%	41.00%

Business Segment and Geograph_4

Business Segment and Geographic Information (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue:
Revenue			$ 23,995	$ 20,620	$ 15,887
Operating income (loss):
Total operating income (loss)			2,467	1,374	(6,770)
Impairments and other charges		$ 265	265	647	3,357	[1]
Impairments and other charges	[1]		(265)	(647)	(3,357)
Interest expense, net of interest income			(554)	(593)	(639)
Other, net			(99)	(99)	(216)
Income (loss) from continuing operations before income taxes			1,814	682	(7,625)
Capital expenditures:
Total capital expenditures			2,026	1,373	798
Depreciation, depletion and amortization:
Total depreciation, depletion and amortization			1,606	1,556	1,503
Total assets:
Total assets			25,982	25,085
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net			8,961	8,521
Completion and Production
Revenue:
Revenue			15,973	13,077	8,882
Operating income (loss):
Total operating income (loss)			2,278	1,625	108
Impairments and other charges					2,100
Capital expenditures:
Total capital expenditures			1,364	1,111	500
Depreciation, depletion and amortization:
Total depreciation, depletion and amortization			1,058	953	900
Total assets:
Total assets	[2]		13,231	12,276
Drilling and Evaluation
Revenue:
Revenue			8,022	7,543	7,005
Operating income (loss):
Total operating income (loss)			745	726	801
Impairments and other charges					1,200
Capital expenditures:
Total capital expenditures			657	261	297
Depreciation, depletion and amortization:
Total depreciation, depletion and amortization			512	563	569
Total assets:
Total assets	[2]		8,037	7,837
Corporate and shared assets
Total assets:
Total assets	[3]		4,714	4,972
Total operations
Operating income (loss):
Total operating income (loss)			3,023	2,351	909
Corporate and other
Operating income (loss):
Total operating income (loss)	[4]		(291)	(330)	(4,322)
Impairments and other charges					10
Capital expenditures:
Total capital expenditures			5	1	1
Depreciation, depletion and amortization:
Total depreciation, depletion and amortization			36	40	34
VENEZUELA
Operating income (loss):
Impairments and other charges	[1]			(647)
North America [Member]
Revenue:
Revenue			14,431	11,564	6,770
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net			5,672	4,922
Latin America [Member]
Revenue:
Revenue			2,065	2,116	1,860
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net			974	945
Europe/Africa/CIS [Member]
Revenue:
Revenue			2,945	2,781	2,993
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net			938	1,098
Middle East/Asia [Member]
Revenue:
Revenue			4,554	4,159	$ 4,264
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net			$ 1,377	$ 1,556
[1]	Impairments and other charges are as follows: -For the year ended December 31, 2018, the aggregate charge of $265 million represents a write-down of all of our remaining investment in Venezuela, consisting of receivables, fixed assets, inventory and other assets and liabilities. -For the year ended December 31, 2017, the aggregate charge of $647 million represents a fair market value adjustment on our existing promissory note with our primary customer in Venezuela and a full reserve against our other accounts receivable with this customer. -For the year ended December 31, 2016, the aggregate charge of $3.4 billion consisted of fixed asset impairments and write-offs, inventory write-downs, impairments of intangible assets, severance costs, country and facility closures, and other charges related to the energy downturn. This included $2.1 billion attributable to Completion and Production, $1.2 billion attributable to Drilling and Evaluation and $10 million
[2]	Assets associated with specific segments primarily include receivables, inventories, certain identified property, plant and equipment (including field service equipment), equity in and advances to related companies and goodwill.
[3]	Corporate and other shared assets primarily include cash and equivalents and deferred tax assets.
[4]	Includes certain expenses not attributable to a particular business segment, such as costs related to support functions and corporate executives, and also includes amortization expense associated with intangible assets recorded as a result of acquisitions. Also includes merger-related costs and a termination fee during the year ended December 31, 2016.

Revenue (Details)

Revenue (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)DivisionCountries	Dec. 31, 2017USD ($)Countries	Dec. 31, 2016USD ($)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	$ 23,995	$ 20,620	$ 15,887
North America [Member]
Disaggregation of Revenue [Line Items]
Revenue	14,431	11,564	6,770
Latin America [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,065	2,116	1,860
Europe/Africa/CIS [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,945	2,781	2,993
Middle East/Asia [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 4,554	4,159	4,264
Minimum
Disaggregation of Revenue [Line Items]
Revenue, Performance Obligation, Description of Payment Terms	P20D
Maximum
Disaggregation of Revenue [Line Items]
Revenue, Performance Obligation, Description of Payment Terms	P60D
Completion and Production
Disaggregation of Revenue [Line Items]
Revenue	$ 15,973	13,077	8,882
Drilling and Evaluation
Disaggregation of Revenue [Line Items]
Revenue	$ 8,022	$ 7,543	$ 7,005
Sales Revenue, Net [Member] | UNITED STATES
Disaggregation of Revenue [Line Items]
Concentration Risk, Percentage	58.00%	53.00%	41.00%

Receivables (Details)

Receivables (Details) $ in Millions		3 Months Ended	12 Months Ended
		Mar. 31, 2018USD ($)	Dec. 31, 2018USD ($)CountriesCustomers	Dec. 31, 2017USD ($)CountriesCustomers	Dec. 31, 2016USD ($)
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
Foreign Currency Exchange Rate, Remeasurement		50,000		10
Impairments and other charges		$ 312
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at Beginning of Period		725	$ 725	$ 175	$ 145
Provision (a)	[1]		57	566	50
Other (b)	[2]		(44)	(16)	(20)
Balance at End of Period			$ 738	$ 725	$ 175
UNITED STATES | Geographic Concentration Risk | Accounts Receivable
Concentration Risk [Line Items]
Concentration Risk, Percentage			43.00%	42.00%
VENEZUELA
Concentration Risk [Line Items]
Allowance for Doubtful Accounts Receivable, Write-offs		119
Write-off of promissory note in Venezuela		32
Inventory Write-down		48
Fixed asset write-offs in Venezuela		53
Other asset and liability write-offs in Venezuela		13
Accrued taxes portion of Venezuela investment write-down		$ 47
[1]	Represents increases to allowance for bad debts charged to costs and expenses, net of recoveries.
[2]	Includes write-offs, balance sheet reclassifications, and other activity.

Inventories (Details)

Inventories (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
LIFO method related items [Abstract]
LIFO inventory amount	$ 186	$ 177
Inventory, LIFO reserve	24	31
Inventory, net [Abstract]
Finished products and parts	1,947	1,547
Raw materials and supplies	934	703
Work in process	147	146
Total	3,028	2,396
Obsolescence reserves	$ 219	$ 276

Property, Plant, and Equipmen_2

Property, Plant, and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 22,143	$ 20,770
Accumulated depreciation	13,182	12,249
Net property, plant and equipment	8,961	8,521
Land
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	252	248
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 3,461	$ 3,460
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)	11.00%	11.00%
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)	42.00%	42.00%
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)	23.00%	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	$ 18,430	$ 17,062
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)	34.00%	35.00%
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)	56.00%	56.00%
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%	9.00%
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, 2018	Dec. 31, 2017	Jul. 21, 2015
Debt Instrument [Line Items]
Long-term Debt and Capital Lease Obligations, Including Current Maturities	$ 10,457,000,000	$ 10,942,000,000
Short-term borrowings and current maturities of long-term debt	36,000,000	512,000,000
Long-term debt	10,421,000,000	10,430,000,000
Debt Instrument, Unamortized Discount	$ (92,000,000)	(98,000,000)
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.
Line of credit facility, maximum borrowing capacity			$ 3,000,000,000
Line of Credit Facility, Remaining Borrowing Capacity	$ 3,000,000,000	3,000,000,000
Long-term Debt, Current Maturities	34,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Two	27,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Three	696,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Four	12,000,000
Long-term Debt, Maturities Repayments of Principal in Year Five	1,100,000,000
Senior notes due November 2045 [Member]
Debt Instrument [Line Items]
Long-term debt	$ 2,000,000,000	$ 2,000,000,000
Interest rate (in hundredths)	5.00%	5.00%
Maturity date	November 2,045	November 2,045
Senior Notes due November 2025 [Member]
Debt Instrument [Line Items]
Long-term debt	$ 2,000,000,000	$ 2,000,000,000
Interest rate (in hundredths)	3.80%	3.80%
Maturity date	November 2,025	November 2,025
Senior notes due August 2023
Debt Instrument [Line Items]
Long-term debt	$ 1,100,000,000	$ 1,100,000,000
Interest rate (in hundredths)	3.50%	3.50%
Maturity date	August 2,023	August 2,023
Senior Notes due November 2035 [Member]
Debt Instrument [Line Items]
Long-term debt	$ 1,000,000,000	$ 1,000,000,000
Interest rate (in hundredths)	4.85%	4.85%
Maturity date	November 2,035	November 2,035
Senior notes due September 2039
Debt Instrument [Line Items]
Long-term debt	$ 1,000,000,000	$ 1,000,000,000
Interest rate (in hundredths)	7.45%	7.45%
Maturity date	September 2,039	September 2,039
Senior notes due August 2043
Debt Instrument [Line Items]
Long-term debt	$ 900,000,000	$ 900,000,000
Interest rate (in hundredths)	4.75%	4.75%
Maturity date	August 2,043	August 2,043
Senior notes due September 2038
Debt Instrument [Line Items]
Long-term debt	$ 800,000,000	$ 800,000,000
Interest rate (in hundredths)	6.70%	6.70%
Maturity date	September 2,038	September 2,038
Senior notes due November 2021
Debt Instrument [Line Items]
Long-term debt	$ 500,000,000	$ 500,000,000
Interest rate (in hundredths)	3.25%	3.25%
Maturity date	November 2,021	November 2,021
Senior notes due November 2041
Debt Instrument [Line Items]
Long-term debt	$ 500,000,000	$ 500,000,000
Interest rate (in hundredths)	4.50%	4.50%
Maturity date	November 2,041	November 2,041
Senior notes due August 2018
Debt Instrument [Line Items]
Long-term debt	$ 0	$ 400,000,000
Interest rate (in hundredths)	2.00%	2.00%
Repayments of Senior Debt	$ 400,000,000
Maturity date	August 2,018	August 2,018
Senior debentures due August 2096
Debt Instrument [Line Items]
Long-term debt	$ 300,000,000	$ 300,000,000
Interest rate (in hundredths)	7.60%	7.60%
Debt instruments non-call feature description	may not be redeemed prior to maturity
Maturity date	August 2,096	August 2,096
Senior debentures due February 2021
Debt Instrument [Line Items]
Long-term debt	$ 185,000,000	$ 185,000,000
Interest rate (in hundredths)	8.75%	8.75%
Maturity date	February 2,021	February 2,021
Senior notes due February 2027 [Member] [Domain]
Debt Instrument [Line Items]
Long-term debt	$ 104,000,000	$ 104,000,000
Interest rate (in hundredths)	6.75%	6.75%
Maturity date	February 2,027	February 2,027
Other Debt Obligations [Member]
Debt Instrument [Line Items]
Long-term debt	$ 160,000,000	$ 251,000,000

Commitments and Contingencies (

Commitments and Contingencies (Environmental) (Details) $ in Millions	Dec. 31, 2018USD ($)Superfund_Sites	Dec. 31, 2017USD ($)
Accrual for Environmental Loss Contingencies Disclosure [Abstract]
Accrued liabilities for environmental matters	$ 42	$ 48
Superfund Sites [Member]
Accrual for Environmental Loss Contingencies Disclosure [Abstract]
Number of superfund sites | Superfund_Sites	8
Accrual for site contingency	$ 9

Commitments and Contingencies_2

Commitments and Contingencies (Guarantee Arrangements) (Details) $ in Billions	Dec. 31, 2018USD ($)
Financial agreements
Guarantee arrangements [Abstract]
Guarantee arrangements outstanding	$ 2

Commitments and Contingencies_3

Commitments and Contingencies (Leases) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Total rentals, net of sublease rentals	$ 680	$ 574	$ 587
Future total rentals on noncancellable operating leases	975
2,019	275
2,020	146
2,021	122
2,022	100
2,023	78
Thereafter	$ 254

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions		3 Months Ended				12 Months Ended
		Dec. 31, 2018		Mar. 31, 2018		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Current income taxes:
Federal						$ 19		$ 40		$ 737
Foreign						(428)		(423)		(415)
State						(15)		(14)		35
Total current						424		397		(357)
Deferred income taxes:
Federal						286		(678)		1,343
Foreign						9		(31)		77
State						(28)		(25)		81
Total deferred						267		(734)		1,501
Income tax benefit (provision)		$ 306				(157)		(1,131)		1,858
The United States and foreign components of income from continuing operations before income taxes [Abstract]
United States						1,097		694		(6,636)
Foreign						717		(12)		(989)
Income (loss) from continuing operations before income taxes						$ 1,814		$ 682		$ (7,625)
Reconciliations between the actual provision for income taxes on continuing operations [Abstract]
United States statutory rate						21.00%		35.00%		35.00%
Impact of U.S. tax reform						(2.60%)		113.00%		0.00%
Venezuela adjustment						5.70%		36.60%		0.00%
Impact of foreign income taxed at different rates						(3.00%)		(18.30%)		(3.20%)
Valuation allowance against tax assets						(16.20%)		(6.20%)		(2.10%)
Undistributed foreign earnings						0.00%		3.80%		(5.10%)
Adjustments of prior year taxes						2.00%		(2.30%)		0.20%
State income taxes						1.90%		1.70%		1.00%
Domestic manufacturing deduction						0.00%		0.00%		(1.30%)
Non-deductible acquisition costs						0.00%		0.00%		0.60%
Other items, net						(0.10%)		2.50%		(0.70%)
Total effective tax rate on continuing operations						8.70%		165.80%		24.40%
Impairments and other charges	[1]					$ 265		$ 647		$ 3,357
Gross deferred tax assets:
Net operating loss carryforwards		1,466				1,466		1,370
Foreign tax credit carryforwards		728				728		828
Employee compensation and benefits		242				242		263
Accrued Liabilities		101				101		97
Other		404				404		416
Total gross deferred tax assets		2,941				2,941		2,974
Gross deferred tax liabilities:
Depreciation and amortization		635				635		315
Undistributed Foreign Earnings		2				2		242
Other		64				64		56
Total gross deferred tax liabilities		701				701		613
Valuation allowances		913				913		1,173
Net deferred income tax asset		1,327				1,327		1,188
Unrecognized Tax Benefits
Beginning Balance				$ 333	[2]	333	[2]	427		322
Change in prior year tax positions						32				44
Change in prior year tax positions								(108)
Change in current year tax positions						63		24		129
Cash settlements with taxing authorities						(7)		(6)		(62)
Lapse of statute of limitations						(4)		(4)		(6)
Ending balance		417	[2],[3]			417	[2],[3]	333	[2]	427
Interest and Penalties
Beginning balance				60		60		61		47
Change in prior year tax positions						11		0		20
Change in current year tax positions						0		2		3
Cash settlements with taxing authorities						(2)		0		(8)
Lapse of statute of limitations						(2)		(3)		(1)
Ending balance		67				67		60		61
Remaining balance if resolved in our favor would positively impact the effective tax rate		399				399		319
Portion of unrecognized tax benefits that could be resolved within the next 12 months		21				21
Impairments and other charges				265		265		647		$ 3,357	[1]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount		47
Foreign Country
Income Tax Contingency [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration		1,500				1,500
Years 2018-2022 [Domain]
Income Tax Contingency [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration		168				168
Years 2024-2028 [Domain]
Income Tax Contingency [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration		180				180
Deferred Tax Assets, Tax Credit Carryforwards, Research and Foreign That Expire		805				805
Years 2029-2038 [Domain]
Income Tax Contingency [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration		786				786
Deferred Tax Assets, Tax Credit Carryforwards, Research and Foreign That Expire		138				138
VENEZUELA
Reconciliations between the actual provision for income taxes on continuing operations [Abstract]
Impairments and other charges	[1]							647
Interest and Penalties
Accrued taxes portion of Venezuela investment write-down				$ 47
All Other Countries [Domain]
Interest and Penalties
Remaining balance if resolved in our favor would positively impact the effective tax rate		$ 18				$ 18		$ 9
[1]	Impairments and other charges are as follows: -For the year ended December 31, 2018, the aggregate charge of $265 million represents a write-down of all of our remaining investment in Venezuela, consisting of receivables, fixed assets, inventory and other assets and liabilities. -For the year ended December 31, 2017, the aggregate charge of $647 million represents a fair market value adjustment on our existing promissory note with our primary customer in Venezuela and a full reserve against our other accounts receivable with this customer. -For the year ended December 31, 2016, the aggregate charge of $3.4 billion consisted of fixed asset impairments and write-offs, inventory write-downs, impairments of intangible assets, severance costs, country and facility closures, and other charges related to the energy downturn. This included $2.1 billion attributable to Completion and Production, $1.2 billion attributable to Drilling and Evaluation and $10 million
[2]	Includes $18 million as of December 31, 2018 and $9 million as of December 31, 2017 in foreign unrecognized tax benefits that would give rise to a United States tax credit. As of December 31, 2018 and December 31, 2017 , approximately $399 million and $319 million
[3]	Includes $21 million that could be resolved within the next 12 months.

Shareholders' Equity (Sharehold

Shareholders' Equity (Shareholders' Equity, Accumulated Other Comprehensive Loss, Common Stock, and Preferred Stock) (Details) - USD ($)		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Stock Repurchased During Period, Shares		10,500,000	0
Treasury Stock, Value, Acquired, Cost Method		$ 400,000,000
Issued		1,069,000,000	1,069,000,000
In treasury		(198,000,000)	(196,000,000)
Total shares of common stock outstanding		871,000,000	873,000,000
Defined benefit and other postretirement liability adjustments	[1]	$ (203,000,000)	$ (334,000,000)
Cumulative translation adjustment		(82,000,000)	(80,000,000)
Other		(70,000,000)	(55,000,000)
Total accumulated other comprehensive loss		(355,000,000)	(469,000,000)
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Stock authorized to repurchase		$ 5,300,000,000
Number of shares of common stock repurchased from inception (in shares)		212,000,000
Approximate value of shares of common stock repurchased from inception		$ 8,800,000,000
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]
Class of Stock [Line Items]
Net actuarial losses		$ 184,000,000	$ 295,000,000
[1]	Included net actuarial losses for our international pension plans of $184 million at December 31, 2018 and $295 million at December 31, 2017 .

Stock-based Compensation (Detai

Stock-based Compensation (Details) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)Offering_Period$ / sharesshares	Dec. 31, 2017USD ($)$ / sharesshares	Dec. 31, 2016USD ($)$ / shares
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]
Proceeds from issuance of common stock | $	$ 195	$ 158	$ 186
Stock Incentive Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation cost | $	274	290	262
Tax benefit | $	(51)	(64)	(77)
Stock-based compensation cost, net of tax | $	$ 223	$ 226	185
Number of shares reserved for issuance to recipient (in shares)	206
Number of shares available for future grant (in shares)	11
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
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	20.9
Granted	3
Exercised	(2.2)
Forfeited/expired	(0.7)
Outstanding at end of period	21	20.9
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	$ 44.92
Granted | $ / shares	46.39
Exercised | $ / shares	40.34
Forfeited/expired | $ / shares	49.44
Outstanding- weighted average price per share end of period (in dollars per share) | $ / shares	$ 45.44	$ 44.92
Weighted Average Remaining Contractual Term (years)	6 years 1 month 6 days
Aggregate Intrinsic Value | $	$ 2
Number of shares exercisable at the end of the period	15.6
Weighted Average Exercise Price per Share, Exercisable at the end of the period | $ / shares	$ 45.28
Weighted Average Remaining Contractual Term (years), Exercisable at the end of the period	5 years 1 month 6 days
Aggregate Intrinsic Value, Exercisable at the end of the Period | $	$ 2
Intrinsic value of stock options exercised during the period | $	25	$ 21	25
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]
Unrecognized compensation cost, non vested awards at period end | $	$ 41
Weighted average period unrecognized compensation costs to be recognized (in years)	2 years
Proceeds from issuance of common stock | $	$ 195	$ 158	$ 186
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected term	5 years 3 months 7 days	5 years 2 months 26 days	5 years 2 months 15 days
Expected volatility	28.00%	32.00%	37.00%
Weighted average grant-date fair value per share | $ / shares	$ 11.56	$ 13.11	$ 12.33
Stock Options | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected dividend yield	1.37%	1.28%	1.35%
Risk-free interest rate	2.27%	1.79%	1.13%
Stock Options | Maximum
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected dividend yield	2.29%	1.72%	2.46%
Risk-free interest rate	2.84%	2.14%	1.84%
Exercise of stock options [Member]
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]
Proceeds from issuance of common stock | $	$ 88	$ 53	$ 80
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
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	25.00%	29.00%	36.00%
Expected dividend yield	1.62%	1.51%	1.87%
Risk-free interest rate	1.92%	0.86%	0.25%
Weighted average grant-date fair value per share | $ / shares	$ 8.86	$ 9.95	$ 8.61
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	25
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	85.00%
Number of shares sold through the plan (in shares)	49
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	15.1
Granted	4.9
Vested	(4.8)
Forfeited	(0.8)
Non vested shares at the end of the period	14.4	15.1
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	$ 45.42
Granted | $ / shares	47.43	$ 45.99	$ 42.87
Vested | $ / shares	45.24
Forfeited | $ / shares	46.62
Weighted Average Grant-Date Fair Value Per Share, Nonvested shares at the end of the period | $ / shares	$ 46.01	$ 45.42
Total fair value of shares vested during the period | $	$ 219	$ 204	$ 223
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration from date of award (in years)	5 years
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]
Unrecognized compensation cost, non vested awards at period end | $	$ 433
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, 2018	Dec. 31, 2017	Dec. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Basic weighted average common shares outstanding	875	870	861
Weighted Average Number Diluted Shares Outstanding Adjustment	2	0	0
Diluted weighted average common shares outstanding	877	870	861
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially Dilutive Securities During Period	14	6	11
Ordinarily Dilutive Shares	0	2	1
Antidilutive securities excluded from the computation of diluted income per share (shares)	14	8	12

Financial Instruments and Ris_3

Financial Instruments and Risk Management (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Number of days from period end	2 days
Debt, Long-term and Short-term, Combined Amount	$ 10,457	$ 10,457
Foreign Currency Derivatives [Abstract]
Maximum term of currency derivative instruments (in years)		1 year
Long-term Debt, Percentage Bearing Fixed Interest, Amount	10,400	$ 10,400	$ 10,400
Estimate of Fair Value, Fair Value Disclosure
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt	10,876	10,876	12,457
Estimate of Fair Value, Fair Value Disclosure | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt	0	0	0
Estimate of Fair Value, Fair Value Disclosure | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt	6,726	6,726	3,285
Estimate of Fair Value, Fair Value Disclosure | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt	4,150	4,150	9,172
Carrying (Reported) Amount, Fair Value Disclosure
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, Long-term and Short-term, Combined Amount			10,942
Foreign Exchange Contract [Member] | Other current assets | Level 2
Foreign Currency Derivatives [Abstract]
Derivative, Notional Amount	591	591	633
Foreign Exchange Contract [Member] | Other assets | Level 2
Foreign Currency Derivatives [Abstract]
Derivative, Notional Amount	$ 100	$ 100	$ 100

Financial Instruments and Ris_4

Financial Instruments and Risk Management (Credit Risk) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
United States | Geographic Concentration Risk | Accounts Receivable
Concentration Risk [Line Items]
Concentration Risk, Percentage	43.00%	42.00%

Retirement Plans (Retirement Pl

Retirement Plans (Retirement Plans, Funded Status) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Expense for the defined contribution plans for continuing operations		$ 193	$ 173	$ 111
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets for Plan Benefits, Defined Benefit Plan		39	2
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at end of period		951	1,200
Fair value of plan assets at end of period		832	940
Funded status at end of period		119	280
Amounts recognized on the Consolidated Balance Sheets
Accrued employee compensation and benefits		8	15
Employee compensation and benefits		150	267
Pension plans in which projected benefit obligation exceeded plan assets
Projected benefit obligation (a)	[1]	176	1,202
Fair value of plan assets		18	920
Pension plans in which accumulated benefit obligation exceeded plan assets
Accumulated benefit obligation (a)	[1]	105	1,139
Fair value of plan assets		18	920
Defined Benefit Plan, Accumulated Benefit Obligation		878	1,200
Foreign Plan [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period		12	11
Foreign Plan [Member] | Equity funds (b)
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[2],[3]	137	204
Foreign Plan [Member] | Bond funds (c)
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[2],[4]	323	369
Foreign Plan [Member] | alternatives fund [Domain]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[2],[5]	209	184
Foreign Plan [Member] | Real Estate Funds [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[2],[6]	109	126
Foreign Plan [Member] | Other assets
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period		42	46
Foreign Plan [Member] | Level 1
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period		6	7
Foreign Plan [Member] | Level 1 | Cash and Cash Equivalents [Member]
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 (b)
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[2],[3]	0	0
Foreign Plan [Member] | Level 1 | Bond funds (c)
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[2],[4]	0	0
Foreign Plan [Member] | Level 1 | alternatives fund [Domain]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[2],[5]	0	0
Foreign Plan [Member] | Level 1 | Real Estate Funds [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[2],[6]	0	0
Foreign Plan [Member] | Level 1 | Other assets
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period		6	7
Foreign Plan [Member] | Level 2
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period		762	842
Foreign Plan [Member] | Level 2 | Cash and Cash Equivalents [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period		12	11
Foreign Plan [Member] | Level 2 | Equity funds (b)
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[2],[3]	137	204
Foreign Plan [Member] | Level 2 | Bond funds (c)
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[2],[4]	302	323
Foreign Plan [Member] | Level 2 | alternatives fund [Domain]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[2],[5]	209	184
Foreign Plan [Member] | Level 2 | Real Estate Funds [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[2],[6]	81	98
Foreign Plan [Member] | Level 2 | Other assets
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period		21	22
Foreign Plan [Member] | Level 3
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period		64	91
Foreign Plan [Member] | Level 3 | Cash and Cash Equivalents [Member]
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 (b)
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[2],[3]	0	0
Foreign Plan [Member] | Level 3 | Bond funds (c)
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[2],[4]	21	46
Foreign Plan [Member] | Level 3 | alternatives fund [Domain]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[2],[5]	0	0
Foreign Plan [Member] | Level 3 | Real Estate Funds [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period	[2],[6]	28	28
Foreign Plan [Member] | Level 3 | Other assets
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Fair value of plan assets at end of period		$ 15	$ 17
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		80.00%
[1]	Our United Kingdom pension plan was underfunded as of December 31, 2017 and overfunded as of December 31, 2018. As such, the fair value of plan assets and projected and accumulated benefit obligation related to this plan are no longer captured in this table at December 31, 2018.
[2]	Common/collective trust funds are valued at the net asset value of units held by the plans at year-end.
[3]	Strategy is to invest in diversified funds of global common stocks.
[4]	Strategy is to invest in diversified funds of fixed income securities of varying geographies and credit quality and whose cash flows approximate the maturities of the benefit obligation.
[5]	Strategy is to invest in a fund of diversifying investments, including but not limited to reinsurance, commodities and currencies.
[6]	Strategy is to invest in diversified funds of real estate investment trusts and private real estate.

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, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	$ 16
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	32	$ 30	$ 30
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment	$ 8	$ 13
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	3.30%	2.80%
Rate of compensation increase	5.80%	5.50%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	2.80%	2.90%	4.20%
Expected long-term return on plan assets	4.10%	4.20%	5.30%
Rate of compensation increase	5.50%	4.80%	5.40%

Retirement Plans International

Retirement Plans International Pension Plan, Expected Benefit Payments (Details) - Foreign Plan [Member] $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of years annual benefit payments	10 years
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 57
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	55
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	59
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	64
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	66
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 386

New Accounting Pronouncements_2

New Accounting Pronouncements (Details) - Subsequent Event $ in Billions	Jan. 01, 2019USD ($)
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	$ 1
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	$ 1.2