| Document and Entity Information | Jun. 09, 2020 |
| Entity Listings [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jun. 9, 2020 |
| Entity Registrant Name | HP Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 1-4423 |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000047217 |
| Common stock, par value $0.01 per share [Member] | |
| Entity Listings [Line Items] | |
| Title of 12(b) Security | Common stock, par value $0.01 per share |
| Trading Symbol | HPQ |
| Security Exchange Name | NYSE |
| Preferred Share Purchase Rights [Member] | |
| Entity Listings [Line Items] | |
| Title of 12(b) Security | Preferred Share Purchase Rights |
| Trading Symbol | N/A |
| Security Exchange Name | NYSE |
