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Description of Company and Significant Accounting Policies (Policies) | 12 Months Ended
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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.
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 | 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. 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. 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.
Research and development | Research and developmentWe 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 or less to be cash equivalents.
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. The components of these other intangible assets generally consist of patents, license agreements, non-compete agreements, trademarks and customer lists and contracts.
Impairment of long-lived assets | Evaluating impairment of long-lived 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. We recognize interest and penalties related to unrecognized tax benefits within the provision for income taxes on continuing operations in our consolidated statements of operations.
Derivative instruments | Derivative instruments At times, we enter into derivative financial transactions to hedge existing or projected exposures to changing foreign currency exchange rates and interest rates. We do not enter into derivative transactions for speculative or trading purposes. We recognize all derivatives on the balance sheet at fair value. Derivatives that are not hedges are adjusted to fair value and reflected through the results of operations. If the derivative is designated as a hedge, depending on the nature of the hedge, changes in the fair value of derivatives are either offset against:
- | the change in fair value of the hedged assets, liabilities or firm commitments through earnings; or
- | recognized in other comprehensive income until the hedged item is recognized in earnings.
The ineffective portion of a derivative’s change in fair value is recognized in earnings. Recognized gains or losses on derivatives entered into to manage foreign currency exchange risk are included in “Other, net” on the consolidated statements of operations. Gains or losses on interest rate derivatives are included in “Interest expense, net.”
Foreign currency translations | Foreign currency 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 compensationStock-based compensation cost is measured at the date of grant, based on the calculated fair value of the award and is recognized as expense over the employee’s service period, which is generally the vesting period of the equity grant. Additionally, compensation cost is recognized based on awards ultimately expected to vest, therefore, we have reduced the cost for estimated forfeitures based on historical forfeiture rates. Forfeitures are estimated at the time of grant and revised in subsequent periods to reflect actual forfeitures. See Note 11 for additional information related to stock-based compensation.

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