v3.25.3

Fair Value (Tables) | 12 Months Ended
--- | ---
Oct. 31, 2025
Fair Value Disclosures [Abstract] |
Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis | The following table presents HP’s assets and liabilities that are measured at fair value on a recurring basis:
| As of October 31, 2025 |  | As of October 31, 2024
| Fair Value Measured Using |  |  |  | Fair Value Measured Using |  |
| Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
| In millions
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash Equivalents |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Government debt(1) | $ | 1,878 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,878 |  |  | $ | 1,332 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,332 |
Available-for-Sale Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial institution instruments | — |  |  | 3 |  |  | — |  |  | 3 |  |  | — |  |  | 3 |  |  | — |  |  | 3 |
Marketable securities and mutual funds(2) | 9 |  |  | 122 |  |  | — |  |  | 131 |  |  | 54 |  |  | 130 |  |  | — |  |  | 184 |
Derivative Instruments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate contracts | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 4 |  |  | — |  |  | 4 |
Foreign currency contracts | — |  |  | 182 |  |  | — |  |  | 182 |  |  | — |  |  | 225 |  |  | — |  |  | 225 |
Other derivatives | — |  |  | 1 |  |  | — |  |  | 1 |  |  | — |  |  | — |  |  | — |  |  | — |
Total assets | $ | 1,887 |  |  | $ | 308 |  |  | $ | — |  |  | $ | 2,195 |  |  | $ | 1,386 |  |  | $ | 362 |  |  | $ | — |  |  | $ | 1,748 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative Instruments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate contracts | $ | — |  |  | $ | 1 |  |  | $ | — |  |  | $ | 1 |  |  | $ | — |  |  | $ | 22 |  |  | $ | — |  |  | $ | 22 |
Foreign currency contracts | — |  |  | 242 |  |  | — |  |  | 242 |  |  | — |  |  | 158 |  |  | — |  |  | 158 |
Other derivatives | — |  |  | 1 |  |  | — |  |  | 1 |  |  | — |  |  | 2 |  |  | — |  |  | 2 |
Total liabilities | $ | — |  |  | $ | 244 |  |  | $ | — |  |  | $ | 244 |  |  | $ | — |  |  | $ | 182 |  |  | $ | — |  |  | $ | 182 |
(1) Money market funds invested in government debt and traded in active markets are included in Level 1. Government debt includes instruments such as U.S. treasury notes, U.S. agency securities and non-U.S. government bonds. (2) As of October 31, 2025 and 2024, $63 million and $78 million, respectively, of debt securities were restricted to fund benefits received by qualifying employees under a sponsored defined benefit plan.

X
- References No definition available. + Details
Name: | us-gaap_FairValueDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
Name: | us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration