Cover Page	6 Months Ended
	Apr. 30, 2021 shares
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Apr. 30, 2021
Document Transition Report	false
Entity File Number	1-4423
Entity Registrant Name	HP INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	94-1081436
Entity Address, Address Line One	1501 Page Mill Road
Entity Address, City or Town	Palo Alto,
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94304
City Area Code	650
Local Phone Number	857-1501
Title of 12(b) Security	Common stock, par value $0.01 per share
Trading Symbol	HPQ
Security Exchange Name	NYSE
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
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	1,201,255,498
Entity Central Index Key	0000047217
Amendment Flag	false
Current Fiscal Year End Date	--10-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2