BASIS OF PRESENTATION AND PRINCIPLE OF CONSOLIDATION | DESCRIPTION OF BUSINESS Varex Imaging Corporation (the “Company,” “Varex” or “Varex Imaging”) designs, manufactures, sells and services a broad range of X-ray imaging components, including X-ray tubes, digital detectors and accessories, high voltage connectors, high-energy inspection accelerators, image processing software and workstations, computer-aided diagnostic software, collimators, automatic exposure control devices, generators, ionization chambers and buckys, for use in a range of applications, including radiographic or fluoroscopic imaging, mammography, special procedures, computed tomography, radio therapy and computer-aided detection. The Company sells its products to imaging system original equipment manufacturer (“OEM”) customers for incorporation into new medical diagnostic, radiation therapy, dental, veterinary and industrial imaging systems, to independent service companies, distributors and directly to end-users for replacement purposes. The Company also designs, manufacturers, sells and services industrial products, which include Linatron® X-ray accelerators, imaging processing software and image detection products for security and inspection purposes, such as cargo screening at ports and borders and nondestructive examination in a variety of applications. The Company generally sells security and inspection products to OEM customers who incorporate Varex’s products into their inspection systems. The Company conducts an active research and development program to focus on new technology and applications in both the medical and industrial X-ray imaging markets. Varex Imaging Corporation was incorporated in Delaware on July 18, 2016 for the purpose of holding the assets and liabilities associated with the Company's business and separated from Varian Medical Systems, Inc. ("Varian") on January 28, 2017, upon which Varian completed the distribution of 100% of the outstanding common stock of Varex to Varian stockholders. Each Varian stockholder received 0.4 of a share of Varex common stock for every one share of Varian common stock held on the close of business on January 20, 2017. Following the separation and distribution, Varex became an independent publicly-traded company and is listed on the NASDAQ Global Select Market under the ticker “VREX.” BASIS OF PRESENTATION AND PRINCIPLE OF CONSOLIDATION The accompanying condensed consolidated financial statements are unaudited. These condensed consolidated financial statements have been prepared by the Company pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) and prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”). In the opinion of management, these condensed consolidated financial statements include all adjustments, consisting only of normal recurring adjustments, necessary for a fair statement of the results for the interim periods. Prior to the date of separation and distribution, the financial statements were prepared on a stand-alone basis and are derived from Varian’s consolidated financial statements and records as it operated as part of Varian prior to the distribution, in conformity with GAAP. The condensed consolidated financial statements include the accounts of the Company and certain other assets and liabilities that were historically held at the Varian corporate level but are specifically identifiable and attributable to the Company. Prior to the separation and distribution, the condensed consolidated financial statements included allocations of certain Varian corporate expenses, including costs of information technology, human resources, accounting, legal, facilities, insurance, treasury and other corporate and infrastructure services. In addition, allocated costs included research and development expenses from Varian’s scientific research facility. Prior to the separation, these costs were allocated to the Company on the basis of direct usage when identifiable or other systematic measures that reflect utilization of services provided to or benefits received by the Company. The Company considers the expense allocation methodology and results to be reasonable for all periods presented. These condensed consolidated financial statements and the accompanying notes are unaudited and should be read in conjunction with the financial statements for the fiscal years ended 2017, 2016 and 2015 included in the Company’s Form 10-K, which was filed with the SEC on December 13, 2017. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Segment Reporting The Company has two reportable operating segments; (i) Medical and (ii) Industrial, which align with how its CEO, which has been identified as the Company's Chief Operating Decision Marker, views and measures the Company’s business performance. See Note 17, “Segment Information” for further information on the Company’s segments. Fiscal Year The fiscal years of the Company as reported are the 52 or 53-week period ending on the Friday nearest September 30. Fiscal year 2018 is the 52-week period ending September 28, 2018. Fiscal year 2017 was the 52-week period that ended on September 29, 2017. The first fiscal quarter of 2018 ended on December 29, 2017 . The first fiscal quarter of 2017 ended on December 30, 2016 . Variable Interest Entities For entities in which the Company has variable interests, the Company focuses on identifying which entity has the power to direct the activities that most significantly impact the variable interest entity’s economic performance and which enterprise has the obligation to absorb losses or the right to receive benefits from the variable interest entity. If the Company is the primary beneficiary of a variable interest entity, the assets, liabilities and results of operations of the variable interest entity will be included in the Company’s condensed consolidated financial statement. During the three months ended December 29, 2017 , the Company had two variable interest entities, only one of which is consolidated, because it was determined that the Company was the primary beneficiary for that entity. As of December 29, 2017 , total assets and liabilities for the consolidated variable interest entity was $6.6 million and $0.1 million , respectively. Use of Estimates The preparation of financial statements in conformity with GAAP requires management 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 condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from these estimates. Cash and Cash Equivalents The Company considers currency on hand, demand deposits, time deposits and all highly-liquid investments with an original maturity of three months or less at the date of purchase to be cash and cash equivalents. Fair Value Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants at the measurement date. There is a three-level fair value hierarchy that prioritizes the inputs used to measure fair value. This hierarchy requires entities to maximize the use of observable inputs and minimize the use of unobservable inputs. The three levels of inputs used to measure fair value are as follows: Level 1—Quoted prices in active markets for identical assets or liabilities. Level 2—Observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets and liabilities in active markets; quoted prices for identical or similar assets and liabilities in markets that are not active; or, other inputs that are observable or can be corroborated by observable market data. Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Derivative instruments and hedging activities The Company records all derivatives on the balance sheet at fair value. For a derivative such as an interest rate swap that is designated as a cash flow hedge, the effective portion of changes in the fair value of the derivative is initially reported in accumulated other comprehensive income (loss) on the consolidated balance sheet and the ineffective portion of changes in the fair value of the derivative is recognized directly in earnings. To the extent the effective portion of a hedge subsequently becomes ineffective, the corresponding amount of the change in fair value of the derivative initially reported in accumulated other comprehensive income (loss) is reclassified and is recognized directly in earnings. Accordingly, on a quarterly basis, the Company assesses the effectiveness of each hedging relationship by comparing the changes in fair value or cash flows of the derivative hedging instrument with the changes in fair value or cash flows of a hypothetical designated perfect hedged item or transaction. If the change in the actual swap is greater than the change in the hypothetical perfect swap, the difference is referred to as “ineffectiveness” and is recognized in earnings in the current period. Concentration of Risk Financial instruments that potentially expose the Company to concentrations of credit risk consist principally of cash, cash equivalents and trade accounts receivable. Cash held with financial institutions may exceed the Federal Deposit Insurance Corporation insurance limits or similar limits in foreign jurisdictions. The Company has not experienced any losses on its deposits of cash and cash equivalents. The Company performs ongoing credit evaluations of its customers and, except for government tenders, group purchases and orders with a letter of credit, its industrial customers often provide a down payment. The Company maintains an allowance for doubtful accounts based upon the expected collectability of all accounts receivable. The Company obtains some of the components in its products from a limited group of suppliers or from a single-source supplier. The Company has neither experienced nor expects any significant disruptions to its operations due to supplier concentration. Inventories Inventories are valued at the lower of cost or net realizable value. Excess and obsolete inventories are determined primarily based on future demand forecasts, and write-downs of excess and obsolete inventories are recorded as a component of cost of revenues. Cost is computed using standard cost (which approximates actual cost) on a first-in-first-out basis. Property, Plant and Equipment Property, plant and equipment are stated at cost, net of accumulated depreciation. Major improvements are capitalized, while repairs and maintenance are expensed as incurred. Depreciation and amortization are computed using the straight-line method over the estimated useful lives of the assets. Land is not subject to depreciation, but land improvements are depreciated over fifteen years. Land leasehold rights and leasehold improvements are amortized over the lesser of their estimated useful lives or remaining lease terms. Buildings are depreciated over twenty years. Machinery and equipment are depreciated over their estimated useful lives, which range from three to seven years. Assets subject to lease are amortized over the lesser of their estimated useful lives or remaining lease terms. Estimated useful lives are periodically reviewed and, when appropriate, changes are made prospectively. When certain events or changes in operating conditions occur, asset lives may be adjusted, and an impairment assessment may be performed on the recoverability of the carrying amounts. When assets are retired or otherwise disposed of, the assets and related accumulated depreciation are removed from the accounts. Investments The Company accounts for its equity investments in privately-held companies under the equity method of accounting as the Company holds at least a 20% ownership interest or has the ability to exercise significant influence in these investments. The Company monitors these equity investments for impairment and makes appropriate reductions in carrying values if the Company determines that impairment charges are required based primarily on the financial condition and near-term prospects of these companies. Goodwill and Intangible Assets Goodwill is recorded when the purchase price of an acquisition exceeds the fair value of the net identified tangible and intangible assets acquired. Purchased intangible assets are carried at cost, net of accumulated amortization, and are included in other assets in the Company's condensed consolidated balance sheets. Intangible assets with finite lives are amortized over their estimated useful lives of primarily two to seven years using the straight-line method. Impairment of Long-lived Assets, Intangible Assets and Goodwill The Company reviews long-lived assets and identifiable intangible assets with finite lives for impairment whenever events or changes in circumstances indicate that the carrying amount of these assets may not be recoverable. The Company assesses these assets for impairment based on their estimated undiscounted future cash flows. If the carrying value of the assets exceeds the estimated future undiscounted cash flows, the Company recognizes an impairment loss based on the excess of the carrying amount over the fair value of the assets. The Company did not recognize any impairment charges for long-lived assets and identifiable intangible assets during any of the periods presented. The Company evaluates goodwill and indefinite lived intangible assets qualitatively for impairment at least annually in beginning of the fourth quarter of each fiscal year or whenever an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount. If the Company determines that a quantitative analysis is necessary, the impairment test for goodwill is currently a two-step process. Step one consists of a comparison of the fair value of a reporting unit against its carrying amount, including the goodwill allocated to each reporting unit. The Company determines the fair value of its reporting units based on a combination of income and market approaches. The income approach is based on the present value of estimated future cash flows of the reporting units, and the market approach is based on a market multiple calculated for each reporting unit based on market data of other companies engaged in similar business. If the carrying amount of the reporting unit is in excess of its fair value, step two requires the comparison of the implied fair value of the reporting unit’s goodwill against the carrying amount of the reporting unit’s goodwill. Any excess of the carrying value of the reporting unit’s goodwill over the implied fair value of the reporting unit’s goodwill is recorded as an impairment loss. The impairment test for intangible assets with indefinite useful lives, if any, consists of a comparison of fair value to carrying value, with any excess of carrying value over fair value being recorded as an impairment loss. No impairment charges were recognized as a result of the change in reporting units. The Company performs its annual goodwill impairment analysis during the fourth quarter of its fiscal year. Loss Contingencies From time to time, the Company is a party to or otherwise involved in legal proceedings, claims and government inspections or investigations and other legal matters, both inside and outside the United States, arising in the ordinary course of its business or otherwise. The Company accrues amounts, to the extent they can be reasonably estimated, that it believes are adequate to address any liabilities related to legal proceedings and other loss contingencies that it believes will result in a probable loss. Product Warranty The Company warrants most of its products for a specific period of time, usually 12 to 24 months from delivery or acceptance, against material defects. The Company provides for the estimated future costs of warranty obligations in cost of revenues when the related revenues are recognized. The accrued warranty costs represent the best estimate at the time of sale of the total costs that the Company will incur to repair or replace product parts that fail while still under warranty. The amount of the accrued estimated warranty costs obligation for established products is primarily based on historical experience as to product failures adjusted for current information on repair costs. For new products, estimates include the historical experience of similar products, as well as reasonable allowance for warranty expenses associated with new products. On a quarterly basis, the Company reviews the accrued warranty costs and updates the historical warranty cost trends, if required. Revenue Recognition The Company’s revenues are derived primarily from the sale of hardware and software products, and services. The Company recognizes its revenues net of any value added or sales tax and net of sales discounts. The Company sells a high proportion of its X-ray products to a limited number of OEM customers. X-ray tubes, digital detectors and image-processing tools and security and inspection products are generally sold on a stand-alone basis. However, the Company occasionally sells its digital detectors, X-ray tubes and imaging processing tools as a package that is optimized for digital X-ray imaging and sells its Linatron ® X-ray accelerators together with its imaging processing software and image detection products to OEM customers that incorporate them into their inspection systems. Service contracts are often sold with certain security and inspection products and computer-aided detection products. Revenues related to service contracts usually start after the expiration of the warranty period for non-software products or upon delivery of software products. For a multiple-element arrangement that includes software and non-software deliverables which includes service contracts, the Company allocates revenues among the software and non-software deliverables on a relative selling price basis. The amounts allocated to the non-software products and software are accounted for as follows: Non-Software Products Non-software products include hardware products, software components that function together with the hardware components to deliver the product’s essential functionality, as well as service contracts. Except as described below under “Service,” the Company recognizes revenues for non-software products when persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the price is fixed or determinable and collectability is reasonably assured. For multiple-element revenue arrangements that involve non-software products, a delivered non-software element is considered as a separate unit of accounting when it has stand-alone value. The allocation of revenue to all deliverables based on their relative selling prices is determined at the inception of the arrangement. The selling price for each deliverable is determined using vendor-specific objective evidence (“VSOE”) of selling price, if it exists; otherwise, third-party evidence of selling price (“TPE”) is used. If the Company is not able to establish VSOE or TPE of selling prices for its non-software products, the Company uses the deliverable's estimated selling price (“ESP”). The Company estimates selling prices following an established process that considers market conditions, including the product offerings and pricing strategies of competitors, as well as internal factors such as historical pricing practices and margin objectives. The establishment of product and service ESPs is controlled and reviewed by the appropriate level of management in all of the Company’s businesses. The Company recognizes revenues upon the transfer of risk of loss, which is either at the time of shipment or delivery, depending upon the terms of the contract, provided that all other revenue recognition criteria have been met. Software Products The Company recognizes revenues for software products in accordance with the software revenue recognition guidance. The Company recognizes license revenues when all of the following criteria have been met: persuasive evidence of an arrangement exists, the vendor’s fee is fixed or determinable, collection of the related receivable is probable and delivery of the product has occurred. Revenues earned on software arrangements involving multiple elements are allocated to each element based on VSOE of fair value, which is based on the price charged when the same element is sold separately. In instances when evidence of VSOE of fair value of all undelivered elements exists, but evidence does not exist for one or more delivered elements, revenues are recognized using the residual method. Under the residual method, the fair value of the undelivered elements is deferred and the remaining portion of the arrangement fee is recognized as revenue. Revenue allocated to maintenance and support is recognized ratably over the maintenance term (typically one year). For those software products that are not sold stand-alone or for which VSOE cannot be established or maintained, all software revenue under the contract will be deferred until the software product(s) that lack VSOE are all delivered. If the only undelivered software element that lacks VSOE is maintenance and support, then the software revenue would be recognized ratably over the term of the maintenance and support arrangement. The Company recognizes revenues upon the transfer of risk of loss, which is either at the time of shipment or delivery, depending upon the shipping terms of the contract, provided that all other criteria for revenue recognition have been met. Service Service revenues include revenues from hardware and software service contracts, bundled support arrangements, paid services and trainings and parts that are sold by the service department. Revenues allocated to service contracts are recognized ratably over the period of performance of the related contracts. Revenues related to services performed on a time-and-materials basis are recognized when they are earned and billable. Deferred Revenues Deferred revenue primarily represents (i) the amount billed, billable or received applicable to non-software products for which parts and services under the warranty contracts have not been delivered, (ii) the amount billed, billable or received applicable to software products for which the Company’s obligations under the maintenance contracts have not been fulfilled and (iii) the amount billed, billable or received for service contracts for which the services have not been rendered. Except for government tenders, group purchases and orders with letters of credit, the Company's security and inspection customers often provide a down payment prior to transfer of risk of loss of ordered products. These payments are also included in deferred revenue on the condensed consolidated balance sheets. Share-Based Compensation Expense The Company has an equity-based incentive plan that provides for the grant of nonqualified stock options and restricted stock units to directors, officers and other employees. The Company also permits employees to purchase shares under the Varex employee stock purchase plan. Prior to the separation, the Company’s employees historically participated in Varian’s equity-based incentive plans. Share-based compensation expense through the date of separation included allocations to the Company based on the awards and terms previously granted to its employees as well as an allocation of Varian’s corporate and shared functional employee expenses. The Company values stock options granted and the option component of the shares of common stock purchased under the equity-based incentive plans and stock purchased under the employee stock purchase plan using the Black-Scholes option-pricing model. Share-based compensation expense for restricted stock units is measured using the fair value of the Company’s stock on the date of grant and is amortized over the award’s respective service period. The Black-Scholes option-pricing model requires the input of certain assumptions, and changes in the assumptions can materially affect the fair value estimates of share-based payment awards. The Company measures and recognizes expense for all share-based payment awards based on their fair values. Share-based compensation expense recognized in the condensed consolidated statements of earnings includes compensation expense for the share-based payment awards based on the grant date fair value estimated in accordance with the guidance on share-based compensation. Share-based compensation expense recognized is based on the value of the portion of share-based payment awards that is ultimately expected to vest. The Company attributes the value of share-based compensation to expense using the straight-line method. The Company considers only the direct tax impacts of share-based compensation awards when calculating the amount of tax windfalls or shortfalls. Shipping and Handling Costs Shipping and handling costs are included as a component of cost of revenues. Research and Development Research and development costs have been expensed as incurred. These costs primarily include employees’ compensation, consulting fees and material costs. Software Development Costs Costs for the development of new software products and substantial enhancements to existing software products are expensed as incurred until technological feasibility has been established, at which time any additional costs would be capitalized. No costs associated with the development of software have been capitalized, as the Company believes its current software development process is essentially completed concurrent with the establishment of technological feasibility. Taxes on Earnings Taxes on earnings, as presented, are calculated in accordance with ASC 740, Accounting for Income Taxes. Under this guidance, each interim reporting period is considered integral to the annual period and tax expense is calculated using an estimated annual effective tax rate. The Company records tax expense each quarter based on its effective tax rate estimated for the full fiscal year and uses that rate to provide for income taxes on a current year-to-date basis, adjusted for discrete taxable events that occur during the interim period. On December 22, 2017, the U.S. Government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (the “Tax Reform Act”). The Tax Reform Act significantly revised the U.S. corporate income tax structure by, among other things, lowering the U.S. corporate income tax rate, repealing certain deductions, and changing the way foreign earnings are taxed. U.S. GAAP requires that the impact of tax legislation be recognized in the period in which the law is enacted. As such, the Company’s estimated annual effective tax rate for the current fiscal year includes the impact of the reduction of the U.S. statutory corporate income tax rate from 35% to 21% beginning January 1, 2018. As a September fiscal year end filer, the lower corporate income tax rate will be phased in resulting in a U.S. statutory federal rate of 24.5% for the fiscal year ending September 28, 2018. This phased in rate has been included in the estimated annual effective rate for the quarter. The current year-to-date income tax expense for the quarter also includes adjustments for other Tax Reform Act components that are discrete during the interim period as required by ASC 740. These include one-time adjustments for a tax on the deemed repatriation of foreign earnings and the revaluation of net deferred taxes. Certain other provisions included in the Tax Reform Act have later effective dates for fiscal year filers and may have an impact on the Company’s future effective tax rate. These include changes in the U.S. taxation of foreign earnings intended to reduce U.S. tax base erosion and the deferral of tax on foreign earnings. The changes included in the Tax Reform Act are broad, complex, and subject to interpretation. The SEC issued guidance under Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act (“SAB 118”) that allows for reasonable estimated impacts to be recorded and a measurement period of up to one year from the date of enactment to revise these provisional amounts as new information is obtained and additional guidance is issued by various regulatory bodies. The amounts included in the current quarter represent provisional reasonable estimates and are anticipated to be finalized in subsequent periods but no later than December 22, 2018. Significant judgments and estimates are required in evaluating the Company’s tax positions and provision for taxes on earnings. The Company accounts for uncertainty in income taxes following a two-step approach for recognizing and measuring uncertain tax positions. The first step is to evaluate the tax position for recognition by determining whether the weight of available evidence indicates that it is more likely than not that, based on the technical merits, the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount that is more than 50% likely of being realized upon settlement. Recognition and measurement are based on management’s best judgment given the facts, circumstances and information available at the end of the accounting period. The Company is subject to taxes on earnings in both the United States and numerous foreign jurisdictions. Foreign earnings are generally taxed at rates that differ from the United States rates, earnings in certain foreign jurisdictions are currently subject to tax in the United States, and the benefit of losses generated in some other foreign jurisdictions is reduced due to full valuation allowance positions in those jurisdictions. Our effective tax rate is impacted by these factors as well as existing laws in both the United States and in the respective countries in which foreign subsidiaries do business. In addition, a change in the mix of earnings and losses among the various jurisdictions could increase or decrease our effective tax rate. Foreign Currency Translation The Company uses the U.S. Dollar as the functional currency of its foreign operations. Gains and losses from remeasurement of foreign currency balances into U.S. Dollars are included in the condensed consolidated statements of earnings. Recent Accounting Standards or Updates Not Yet Effective In August 2017, the FASB issued Accounting Standard Update ("ASU") 2017-12 which targets improvements to accounting for hedging activities which amends and simplifies existing guidance in order to allow companies to more accurately present the economic effects of risk management activities in the financial statements. The guidance is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. The Company does not expect that the adoption of this guidance will have a material impact on its consolidated financial statements. In May 2017, the FASB issued ASU 2017-09 which provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting. The guidance is effective for the Company beginning in the first quarter of fiscal year 2019. Early adoption is permitted. The Company does not expect that the adoption of this guidance will have a material impact on its consolidated financial statements. In March 2017, the FASB issued ASU 2017-07 which amended its guidance on the accounting related to defined benefit plans and other post-retirement benefits. This amendment requires the service cost component of net periodic pension and post-retirement benefit cost be presented in the same line item as other employee compensation costs, while the other components be presented separately as non-operating income (expense). The amendment will be effective for the Company beginning in its first quarter of fiscal year 2019. Early adoption is permitted. The Company is evaluating the impact of adopting this amendment to its consolidated fin |