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Cover Page - USD ($)
 12 Months Ended
Oct. 31, 2021
Dec. 07, 2021
Apr. 30, 2021
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Oct. 31, 2021    
Document Transition Report false    
Entity File Number 001-37483    
Entity Registrant Name HEWLETT PACKARD ENTERPRISE CO    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 47-3298624    
Entity Address, Address Line One 11445 Compaq Center West Drive,    
Entity Address, City or Town Houston,    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 77070    
City Area Code (650)    
Local Phone Number 687-5817    
Title of 12(b) Security Common stock, par value $0.01 per share    
Trading Symbol HPE    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 20,839,669,847
Entity Common Stock, Shares Outstanding   1,293,439,907  
Documents Incorporated by Reference
DOCUMENTS INCORPORATED BY REFERENCE
DOCUMENT DESCRIPTION 10-K PART
Portions of the Registrant's proxy statement related to its 2022 Annual Meeting of Stockholders to be filed pursuant to Regulation 14A within 120 days after Registrant's fiscal year end of October 31, 2021 are incorporated by reference into Part III of this Report.
 III
    
Entity Central Index Key 0001645590    
Amendment Flag false    
Current Fiscal Year End Date --10-31    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY