Overview and Basis of Presentation (Policies)	9 Months Ended
Overview and Basis of Presentation (Policies)	Jul. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation These Condensed Consolidated Financial Statements of the Company were prepared in accordance with United States ("U.S.") Generally Accepted Accounting Principles ("GAAP"). In the opinion of management, the accompanying unaudited Condensed Consolidated Financial Statements of Hewlett Packard Enterprise contain all adjustments, including normal recurring adjustments, necessary to present fairly the Company's financial position as of July 31, 2018 and October 31, 2017, its results of operations for the three and nine months ended July 31, 2018 and 2017 and its cash flows for the nine months ended July 31, 2018 and 2017. The results of operations for the three and nine months ended July 31, 2018 and its cash flows for the nine months ended July 31, 2018, are not necessarily indicative of the results to be expected for the full year. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with the Company's Annual Report on Form 10-K for the fiscal year ended October 31, 2017, including "Management's Discussion and Analysis of Financial Condition and Results of Operations," "Quantitative and Qualitative Disclosures About Market Risk" and the Consolidated and Combined Financial Statements and notes thereto included in Items 7, 7A and 8, respectively, included therein.
Principles of Consolidation	Principles of Consolidation The accompanying unaudited Condensed Consolidated Financial Statements include the accounts of the Company and all subsidiaries and affiliates in which the Company has a controlling financial interest or is the primary beneficiary. All intercompany transactions and accounts within the consolidated businesses of the Company have been eliminated. The Company accounts for investments in companies over which it has the ability to exercise significant influence but does not hold a controlling interest under the equity method of accounting, and the Company records its proportionate share of income or losses in Earnings (loss) from equity interests in the Condensed Consolidated Statements of Earnings. Non-controlling interests are presented as a separate component within Total stockholders' equity in the Condensed Consolidated Balance Sheets. Net earnings attributable to non-controlling interests are recorded within Interest and other, net in the Condensed Consolidated Statements of Earnings and are not presented separately, as they were not material for any period presented.
Segment Realignment and Reclassifications	Segment Realignment and Reclassifications See Note 3, "Segment Information", for a discussion of the Company's segment realignment.
Use of Estimates	Use of Estimates The preparation of financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the Company's Condensed Consolidated Financial Statements and accompanying notes. Actual results could differ materially from those estimates.
Acquisition	Acquisition On June 1, 2018 the Company completed the acquisition of Plexxi, a leading provider of software-defined data fabric networking technology. Plexxi's results of operations have been included within the Hybrid IT segment from the date of the acquisition.
Recent Tax Legislation	Recent Tax Legislation On December 22, 2017, the Tax Cuts and Jobs Act (the “Tax Act”) was enacted into law. The Tax Act includes significant changes to the U.S. corporate income tax structure, including a federal corporate rate reduction from 35% to 21% effective January 1, 2018; limitations on the deductibility of interest expense and executive compensation; creation of new minimum taxes such as the Base Erosion Anti-abuse Tax (“BEAT”) and the Global Intangible Low Taxed Income (“GILTI”) tax; and the transition of U.S. international taxation from a worldwide tax system to a modified territorial tax system, which will result in a one-time U.S. tax liability on those earnings which have not previously been repatriated to the U.S. (the “Transition Tax”). In December 2017, the U.S. Securities and Exchange Commission ("SEC") issued Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act (“SAB 118”), which allows the Company to record provisional amounts during a measurement period not to extend beyond one year of the enactment date. Due to the complexity involved in applying the provisions of the Tax Act, the Company has not completed the accounting for the effects of the Tax Act, but has made reasonable estimates of the effects and recorded provisional amounts in its Condensed Consolidated Financial Statements for the three and nine months ended July 31, 2018. The accounting for the tax effects of the Tax Act will be completed during the measurement period in accordance with SAB 118. For further details, see Note 7, "Taxes on Earnings".
Recently Adopted Accounting Pronouncements and Recently Enacted Accounting Pronouncements	Recently Adopted Accounting Pronouncements In March 2018, the Financial Accounting Standards Board (“FASB”) issued guidance that amends ASC 740, Income Taxes, to reflect and codify SAB 118. The guidance became effective upon issuance. The Company applied SAB 118 upon the original issuance in December 2017 prior to the codification. See Note 7, “Taxes on Earnings” for a full description of the impact of the Tax Act to the Company's operations. In March 2016, the FASB amended the existing accounting standards for employee share-based payment arrangements. The new guidance requires excess tax benefits and tax deficiencies to be recorded in the income statement when stock awards vest or are settled. In addition, cash flows related to excess tax benefits will no longer be separately classified as an inflow from financing activities, with a corresponding outflow from operating activities, but will be classified along with other income tax cash flows as an operating activity. The standard also allows the Company to repurchase more of an employee’s vesting shares for tax withholding purposes without triggering liability accounting and clarifies that all cash payments made to tax authorities on an employee’s behalf for withheld shares should be presented as a financing activity on the statement of cash flows. The Company adopted the guidance in the first quarter of fiscal 2018 and prospectively recorded all excess tax benefits and tax deficiencies arising from stock awards vesting or settled as income tax expense or benefit, rather than in equity. For the three and nine months ended July 31, 2018, the impact of the adoption was the recognition of $26 million and $68 million respectively, of net excess tax benefits as a component of the (provision) benefit for income taxes. The Company elected to continue to estimate forfeitures of awards in determining stock-based compensation expense. The Company elected to apply the presentation requirements for cash flows retrospectively, which resulted in an increase to Net cash provided by operating activities of $441 million and a corresponding increase to Net cash used in financing activities for the nine months ended July 31, 2017. There were no other material impacts to the Company's Condensed Consolidated Financial Statements as a result of adopting this standard. Recently Enacted Accounting Pronouncements In February 2018, the FASB issued guidance that allows companies to reclassify stranded tax effects resulting from the Tax Act, from accumulated other comprehensive income to retained earnings. The guidance also requires certain new disclosures regardless of the election. The Company is required to adopt the guidance in the first quarter of fiscal 2020. Early adoption is permitted. The Company is currently evaluating the timing and the impact of these amendments to its Condensed Consolidated Financial Statements. In February 2016, the FASB amended the existing accounting standards for leases. The amendments require lessees to record, at lease inception, a lease liability for the obligation to make lease payments and a right-of-use ("ROU") asset for the right to use the underlying asset for the lease term on their balance sheets. Lessees may elect to not recognize lease liabilities and ROU assets for most leases with terms of 12 months or less. The lease liability is measured at the present value of the lease payments over the lease term. The ROU asset will be based on the liability, adjusted for lease prepayments, lease incentives received, and the lessee's initial direct costs. For finance leases, lease expense will be the sum of interest on the lease obligation and amortization of the ROU asset, resulting in a front-loaded expense pattern. For operating leases, lease expense will generally be recognized on a straight-line basis over the lease term. The amended lessor accounting model is similar to the current model, updated to align with certain changes to the lessee model and the new revenue standard. The current sale-leaseback guidance, including guidance applicable to real estate, is also replaced with a new model for both lessees and lessors. The Company is required to adopt the guidance in the first quarter of fiscal 2020 and early adoption is permitted. In addition, the FASB provided a practical expedient transition method to adopt the new lease requirements by allowing companies to recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption that would enable the Company to not provide comparative period financial statements. Instead, the Company would apply the transition provisions at its effective date. The Company is currently evaluating the timing and the impact of these amendments on its Condensed Consolidated Financial Statements. In May 2014, the FASB amended the existing accounting standards for revenue recognition. The Company plans to adopt the new revenue standard in the first quarter of fiscal 2019, beginning November 1, 2018, using the modified retrospective method. The Company has completed a review of the accounting systems and processes required to apply the modified retrospective method. In response, the Company is in the process of implementing a new IT solution as part of the adoption of the new standard. The Company expects revenue recognition for its broad portfolio of hardware, software and services offerings to remain largely unchanged. However, the guidance is expected to change the timing of revenue recognition in certain areas, including accounting for certain software licenses. The Company is still assessing the impact of these changes. Since the Company currently expenses sales commissions as incurred, the requirement in the new standard to capitalize certain sales commissions will result in an accounting change for the Company. The Company is in the process of quantifying the impact on its Consolidated Financial Statements. The Company will continue to assess the impact of the new revenue standard as it works through the adoption in fiscal 2018, and there still remain areas to be fully concluded upon. There have been no other significant changes to the Company's accounting policies or recently adopted or enacted accounting pronouncements disclosed in the Company's Annual Report on Form 10-K for the fiscal year ended October 31, 2017.
Segment Policy	Segment Policy There have been no significant changes to the Company's segment accounting policies disclosed in the Company's Annual Report on Form 10-K for the fiscal year ended October 31, 2017, except as described in the 'Segment Realignment' section below. Hewlett Packard Enterprise periodically engages in intercompany advanced royalty payment and licensing arrangements that may result in advance payments between subsidiaries. Revenues from these intercompany arrangements are deferred and recognized as earned over the term of the arrangement by the Hewlett Packard Enterprise legal entities involved in such transactions; however, these advanced payments are eliminated from revenues as reported by Hewlett Packard Enterprise and its business segments. Hewlett Packard Enterprise executed intercompany advanced royalty payment arrangements resulting in advanced payments of $439 million during the first nine months of fiscal 2017. In these transactions, the payments were received in the U.S. from a foreign consolidated affiliate, with a deferral of intercompany revenues over the term of the arrangements, approximately 15 years. The impact of these intercompany arrangements is eliminated from both Hewlett Packard Enterprise's consolidated and segment net revenues. Hewlett Packard Enterprise does not allocate to its segments certain operating expenses, which it manages at the corporate level. These unallocated costs include certain corporate costs and eliminations, stock-based compensation expense related to corporate and certain global functions, transformation costs, amortization of intangible assets, acquisition and other related charges, restructuring charges, separation costs and defined benefit plan settlement charges and remeasurement (benefit).
Fair Value	Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the measurement date. Fair Value Hierarchy The Company uses valuation techniques that are based upon observable and unobservable inputs. Observable inputs are developed using market data such as publicly available information and reflect the assumptions market participants would use, while unobservable inputs are developed using the best information available about the assumptions market participants would use. Assets and liabilities are classified in the fair value hierarchy based on the lowest level input that is significant to the fair value measurement: Level 1—Quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2—Quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability and market-corroborated inputs. Level 3—Unobservable inputs for the asset or liability. The fair value hierarchy gives the highest priority to observable inputs and lowest priority to unobservable inputs.