| **Significant Accounting Policies - (Notes)** | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        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| **Accounting Policies [Abstract]**            |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        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| Summary of significant accounting policies    | SUMMARY OF SIGNIFICANT ACCOUNTING POLICIESNature of OperationsBaker Hughes Incorporated (“Baker Hughes,” “Company,” “we,” “our,” or “us,”) is a leading supplier of oilfield services, products, technology and systems used in the worldwide oil and natural gas industry.  We also provide products and services for other businesses including downstream chemicals, and process and pipeline services.Basis of PresentationOur consolidated financial statements are prepared in conformity with United States generally accepted accounting principles ("GAAP").  The consolidated financial statements include the accounts of Baker Hughes and all of our subsidiaries where we exercise control.  For investments in subsidiaries that are not wholly-owned, but where we exercise control, the equity held by the minority owners and their portions of net income (loss) are reflected as noncontrolling interests.  Investments over which we have the ability to exercise significant influence over operating and financial policies, but do not hold a controlling interest, are accounted for using the equity method of accounting.  Intercompany accounts and transactions have been eliminated in consolidation.  In the Notes to Consolidated Financial Statements, all dollar and share amounts in tabulations are in millions of dollars and shares, respectively, unless otherwise indicated.Use of EstimatesThe preparation of financial statements in conformity with GAAP requires management to make estimates and judgments that affect the reported amounts of assets and liabilities, disclosure of any contingent assets or liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period.  We base our estimates and judgments on historical experience and on various other assumptions and information that are believed to be reasonable under the circumstances.  Estimates and assumptions about future events and their effects cannot be perceived with certainty, and accordingly, these estimates may change as new events occur, as more experience is acquired, as additional information is obtained and as our operating environment changes.  While we believe that the estimates and assumptions used in the preparation of the consolidated financial statements are appropriate, actual results could differ from those estimates.  Estimates are used for, but are not limited to, determining the following: allowance for doubtful accounts and inventory valuation reserves; recoverability of long-lived assets; useful lives used in depreciation and amortization; income taxes and related valuation allowances; accruals for contingencies; actuarial assumptions to determine costs and liabilities related to employee benefit plans; stock-based compensation expense and the fair value of assets acquired and liabilities assumed in acquisitions.Revenue RecognitionOur products and services are sold based upon purchase orders, contracts or other agreements with the customer that include fixed or determinable prices and that do not include right of return or other similar provisions or other significant post-delivery obligations.  We recognize revenue for products sold upon delivery, when title passes, when collectability is reasonably assured and when there are no further significant obligations for future performance.  Provisions for estimated warranty returns or similar arrangements are made at the time the related revenue is recognized.  Revenue for services is recognized as the services are rendered and when collectability is reasonably assured.  Rates for services are typically priced on a per day, per distance drilled, per man hour or similar basis.  In certain situations, revenue is generated from transactions that may include multiple products and services under one contract or agreement and which may be delivered to the customer over an extended period of time.  Revenue from these arrangements is recognized in accordance with the above criteria and as each item or service is delivered based on their relative fair value.Research and EngineeringResearch and engineering expenses are expensed as incurred and include costs associated with the research and development of new products and services and costs associated with sustaining engineering of existing products and services.  Costs for research and development of new products and services were $347 million, $430 million and $370 million for the years ended December 31, 2015, 2014 and 2013, respectively.Cash and Cash EquivalentsCash equivalents include only those investments with an original maturity of three months or less.  We maintain cash deposits with financial institutions that may exceed federally insured limits.  We monitor the credit ratings and our concentration of risk with these financial institutions on a continuing basis to safeguard our cash deposits.Allowance for Doubtful AccountsWe establish an allowance for doubtful accounts based on various factors including the payment history and financial condition of our customers and the economic environment.  Provisions for doubtful accounts are recorded based on the aging status of the customer accounts or when it becomes evident that the customer will not make the required payments at either contractual due dates or in the future.  Provision for doubtful accounts recorded in cost of sales was $193 million, $102 million and $75 million for the years ended December 31, 2015, 2014 and 2013, respectively.Concentration of Credit RiskWe grant credit to our customers who primarily operate in the oil and natural gas industry.  Although this concentration affects our overall exposure to credit risk, our trade receivables are spread over a diverse group of customers across many countries, which mitigates this risk.  We perform periodic credit evaluations of our customers’ financial condition, including monitoring our customers’ payment history and current credit worthiness to manage this risk.  We do not generally require collateral in support of our trade receivables, but we may require payment in advance or security in the form of a letter of credit or bank guarantee.  During 2015, 2014 and 2013, no individual customer accounted for more than 10% of our consolidated revenue.InventoriesInventories are stated at the lower of cost or market.  Cost is determined using the average cost method, and includes the cost of materials, labor and manufacturing overhead.  As necessary, we record provisions and maintain reserves for excess, slow moving and obsolete inventory.  To determine these reserve amounts, we regularly review inventory quantities on hand and compare them to estimates of future product demand, market conditions, production requirements and technological developments.Property, Plant and Equipment and Accumulated DepreciationProperty, plant and equipment (“PP&E”) is stated at cost less accumulated depreciation, which is generally provided by using the straight-line method over the estimated useful lives of the individual assets.  Significant improvements and betterments are capitalized if they extend the useful life of the asset.  We manufacture a substantial portion of our tools and equipment and the cost of these items, which includes direct and indirect manufacturing costs, is capitalized and carried in inventory until it is completed.  When complete, the cost is reflected in capital expenditures and is classified as machinery, equipment and other in PP&E.  Maintenance and repairs are charged to expense as incurred.  Upon sale or other disposition, the applicable amounts of asset cost and accumulated depreciation are removed from the balance sheet and the net amount, less proceeds from disposal, is charged or credited to income.  The capitalized costs of computer software developed or purchased for internal use are classified in machinery, equipment and other.Goodwill, Intangible Assets and AmortizationGoodwill is the excess of the consideration transferred over the fair value of the tangible and identifiable intangible assets and liabilities recognized in acquisitions.  Goodwill and intangible assets with indefinite lives are not amortized.  Intangible assets with finite useful lives are amortized on a basis that reflects the pattern in which the economic benefits of the intangible assets are realized, which is generally on a straight-line basis over the asset’s estimated useful life.Impairment of PP&E, Intangibles, Other Long-lived Assets and GoodwillWe review PP&E, intangible assets and certain other long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable and at least annually for certain intangible assets.  The determination of recoverability is made based upon the estimated undiscounted future net cash flows.  The amount of impairment loss, if any, is determined by comparing the fair value, as determined by a discounted cash flow analysis, with the carrying value of the related assets.We perform an annual impairment test of goodwill for each of our reporting units as of October 1, or more frequently if an event occurs or circumstances change to indicate that it is more likely than not that an impairment may exist.  Our reporting units are based on our organizational and reporting structure and are the same as our five reportable segments.  Corporate and other assets and liabilities are allocated to the reporting units to the extent that they relate to the operations of those reporting units in determining their carrying amount.  When performing the annual impairment test we have the option of first performing a qualitative assessment to determine the existence of events and circumstances that would lead to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount.  If such a conclusion is reached, we would then be required to perform a quantitative impairment assessment of goodwill.  However, if the assessment leads to a determination that it is more likely than not that the fair value of a reporting unit is greater than its carrying amount, then no further assessments are required.  In 2015 and 2014, we performed a qualitative assessment for our annual goodwill impairment test.  In 2013, a quantitative assessment for the determination of impairment was made by comparing the carrying amount of each reporting unit with its fair value, which is generally calculated using a combination of market, comparable transaction and discounted cash flow approaches.In performing our annual goodwill impairment analysis for 2015, our qualitative assessment included consideration of current industry and market conditions and circumstances as well as any mitigating factors that would most affect the fair value of the Company and its reporting units.  Among those mitigating factors, we considered the value of the consideration to be received at closing of the Merger (as defined below), based on the terms of the Merger Agreement (as defined below), compared to the carrying value of the Company and its reporting units.  Based on our assessment and consideration of the totality of the facts and circumstances, including our business environment in the fourth quarter of 2015, we determined that it is not more likely than not that the fair value of the Company or any of its reporting units is less than their respective carrying amounts; however, a decline in our stock price could require an impairment in future periods.  As such, no impairments of goodwill were recorded for the year ended December 31, 2015, or any of the prior years included in the accompanying financial statements.Income TaxesWe use the liability method in determining our provision and liabilities for our income taxes, under which current and deferred tax liabilities and assets are recorded in accordance with enacted tax laws and rates.  Deferred tax liabilities and assets, which are computed on the estimated income tax effect of temporary differences between financial and tax bases in assets and liabilities, are determined using the tax rate expected to be in effect when taxes are actually paid or recovered.  A valuation allowance to reduce deferred tax assets is established when it is more likely than not that some portion or all of the deferred tax assets will not be realized.We intend to indefinitely reinvest certain earnings of our foreign subsidiaries in operations outside the U.S., and accordingly, we have not provided for U.S. income taxes on such earnings.  We do provide for the U.S. and additional non-U.S. taxes on earnings anticipated to be repatriated from our non-U.S. subsidiaries.Our tax filings for various periods are subject to audit by tax authorities in most jurisdictions where we conduct business.  These audits may result in assessments of additional taxes that are resolved with the authorities or through the courts.  We have provided for the amounts we believe will ultimately result from these proceedings.  In addition to the assessments that have been received from various tax authorities, we also provide for taxes for uncertain tax positions where formal assessments have not been received.  We classify interest and penalties related to uncertain tax positions as income taxes in our financial statements.Environmental MattersEstimated remediation costs are accrued using currently available facts, existing environmental permits, technology and enacted laws and regulations.  Our cost estimates are developed based on internal evaluations and are not discounted.  Accruals are recorded when it is probable that we will be obligated to pay for environmental site evaluation, remediation or related activities, and such costs can be reasonably estimated.  As additional information becomes available, accruals are adjusted to reflect current cost estimates.  Ongoing environmental compliance costs, such as obtaining environmental permits, installation of pollution control equipment and waste disposal are expensed as incurred.  Where we have been identified as a potentially responsible party in a U.S. federal or state Comprehensive Environmental Response, Compensation and Liability Act (“Superfund”) site, we accrue our share of the estimated remediation costs of the site.  This share is based on the ratio of the estimated volume of waste we contributed to the site to the total volume of waste disposed at the site.Foreign CurrencyA number of our significant foreign subsidiaries have designated the local currency as their functional currency and, as such, gains and losses resulting from balance sheet translation of foreign operations are included as a separate component of accumulated other comprehensive loss within stockholders’ equity.  Gains and losses from foreign currency transactions, such as those resulting from the settlement of receivables or payables in the non-functional currency, are included in marketing, general and administrative (“MG&A”) expenses in the consolidated statements of income (loss) as incurred.  For those foreign subsidiaries that have designated the U.S. Dollar ("USD") as the functional currency, monetary assets and liabilities are remeasured at period-end exchange rates, and nonmonetary items are remeasured at historical exchange rates.  Gains and losses resulting from this balance sheet remeasurement are also included in MG&A expenses as incurred.In 2015 and 2014, the Venezuelan government modified its currency exchange systems, which impacted the rate at which we could reasonably expect to exchange the Venezuelan Bolivars Fuertes ("BsF") for the U.S. Dollar.  As a result of the change in the exchange rate, in 2015 and 2014, we recognized a foreign currency loss of approximately $5 million and $12 million, respectively, related to the remeasurement of our BsF denominated assets and liabilities.  This loss was recorded in MG&A expenses.  We believe any further devaluation of Venezuela's currency would not have a material impact on our financial position, results of operations or cash flows.In 2013, Venezuela's currency was devalued from the prior exchange rate of 4.3 BsF per USD to 6.3 BsF per USD.  The impact of this devaluation was a loss of $23 million that was recorded in MG&A expenses.Fair Value MeasurementThe Company defines fair value as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at a measurement date.  The Company applies the following fair value hierarchy, which prioritizes the inputs used to measure fair value into three levels and bases the categorization within the hierarchy upon the lowest level of input that is available and significant to the fair value measurement:•Level One:  The use of quoted prices in active markets for identical financial instruments.•Level Two:  The use of quoted prices for similar instruments in active markets or quoted prices for identical or similar instruments in markets that are not active or other inputs that are observable in the market or can be corroborated by observable market data.•Level Three:  The use of significantly unobservable inputs that typically require the use of management's estimates of assumptions that market participants would use in pricing.Financial InstrumentsOur financial instruments include cash and cash equivalents, accounts receivable, investments, accounts payable, short and long-term debt, and derivative financial instruments.  Except for long-term debt, the estimated fair value of our financial instruments at December 31, 2015 and 2014 approximates their carrying value as reflected in our consolidated balance sheets.  For further information on the fair value of our debt, see Note 12. "Indebtedness."We monitor our exposure to various business risks including commodity prices, foreign currency exchange rates and interest rates and regularly use derivative financial instruments to manage these risks.  Our policies do not permit the use of derivative financial instruments for speculative purposes.  At the inception of a new derivative, we designate the derivative as a hedge or we determine the derivative to be undesignated as a hedging instrument.  We document the relationships between the hedging instruments and the hedged items, as well as our risk management objectives and strategy for undertaking various hedge transactions.  We assess whether the derivatives that are used in hedging transactions are highly effective in offsetting changes in cash flows of the hedged item at both the inception of the hedge and on an ongoing basis.We have a program that utilizes foreign currency forward contracts to reduce the risks associated with the effects of certain foreign currency exposures.  Under this program, our strategy is to have gains or losses on the foreign currency forward contracts mitigate the foreign currency transaction and translation gains or losses to the extent practical.  These foreign currency exposures typically arise from changes in the value of assets and liabilities which are denominated in currencies other than the functional currency.  Our foreign currency forward contracts generally settle in less than 180 days.  We record all derivatives as of the end of our reporting period in our consolidated balance sheet at fair value.  For those forward contracts designated as fair value hedging instruments or held as undesignated hedging instruments, we record the changes in fair value of the forward contracts in our consolidated statements of income (loss) along with the change in fair value of the hedged item.  Changes in the fair value of forward contracts designated as cash flow hedging instruments are recognized in other comprehensive income until the hedged item is recognized in earnings.  For derivatives designated as a cash flow hedge, the ineffective portion of that derivative's change in fair value is recognized in earnings.  Recognized gains and losses on derivatives entered into to manage foreign currency exchange risk are included in MG&A expenses in the consolidated statements of income (loss).We had outstanding foreign currency forward contracts with notional amounts aggregating $499 million and $580 million to hedge exposure to currency fluctuations in various foreign currencies at December 31, 2015 and 2014, respectively.  Based on quoted market prices as of December 31, 2015 or 2014 for forward contracts with similar terms and maturity dates, we recorded losses of $1 million and $11 million, respectively, to adjust these forward contracts to their fair market value.New Accounting Standards UpdatesIn May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customers.  The ASU will supersede most of the existing revenue recognition requirements in U.S. GAAP and will require entities to recognize revenue at an amount that reflects the consideration to which the Company expects to be entitled in exchange for transferring goods or services to a customer.  The new standard also requires significantly expanded disclosures regarding the qualitative and quantitative information of an entity's nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers.  The pronouncement is to be applied retrospectively and is effective for annual reporting periods beginning after December 15, 2017, with early adoption permitted as of January 1, 2017.  We have not completed an evaluation of the impact the pronouncement will have on our consolidated financial statements and related disclosures.In April 2015, the FASB issued ASU No. 2015-3, Simplifying the Presentation of Debt Issuance Costs.  The ASU requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts.  The pronouncement is effective for annual reporting periods beginning after December 15, 2015.  We currently report debt issuance costs consistent with the guidance of this ASU; therefore there will be no impact on our consolidated financial statements and related disclosures upon adoption.In April 2015, the FASB issued ASU No. 2015-5, Customer's Accounting for Fees Paid in a Cloud Computing Arrangement.  The ASU provides guidance to customers about whether a cloud computing arrangement includes a software license and the related accounting treatment.  The pronouncement is effective for annual reporting periods beginning after December 15, 2015.  Adoption of this pronouncement is not expected to have a material impact on our consolidated financial statements or related disclosures.In July 2015, the FASB issued ASU No. 2015-11, Simplifying the Measurement of Inventory, which requires inventory measured using the FIFO or average cost methods to be subsequently measured at the lower of cost or net realizable value.  Net realizable value is the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation.  Currently, inventory measured using these methods is required to be subsequently measured at the lower of cost or market with market defined as replacement cost, net realizable value or net realizable value less a normal profit margin.  This pronouncement is effective for annual reporting periods beginning after December 15, 2016 on a prospective basis.  Early adoption is permitted.  We have not completed an evaluation of the impact the pronouncement will have on our consolidated financial statements and related disclosures.In November 2015, the FASB issued ASU No. 2015-17, Balance Sheet Classification of Deferred Taxes, which amends existing guidance on income taxes to require the classification of all deferred tax assets and liabilities as noncurrent on the balance sheet.  The pronouncement is effective for annual reporting periods beginning after December 15, 2016, and may be applied either prospectively or retrospectively.  We have not completed an evaluation of the impact the pronouncement will have on our consolidated financial statements and related disclosures. |

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| - References
No definition available.
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| - Definition
The entire disclosure for all significant accounting policies of the reporting entity.
+ References
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