Segment Information - Schedule of Reconciliation of Segment Assets to HP Consolidated Assets (Details) - USD ($) $ in Millions	Oct. 31, 2025	Oct. 31, 2024
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 41,769	$ 39,909
Total segments | Personal Systems
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	24,928	22,378
Total segments | Printing
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	14,632	16,457
Total segments | Corporate Investments
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	279	181
Corporate and unallocated assets
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 1,930	$ 893