Segment Information - Schedule of Reconciliation of Segment Operating Results to HP Consolidated Results (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2024	Jul. 31, 2023
Net revenue:
Total net revenue	$ 13,519	$ 13,196	$ 39,504	$ 39,901
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total segment earnings from operations	940	952	2,827	2,442
Restructuring and other charges	(46)	(75)	(180)	(416)
Acquisition and divestiture charges	(22)	(48)	(71)	(205)
Amortization of intangible assets	(81)	(91)	(242)	(262)
Interest and other, net	(113)	(16)	(410)	(357)
Earnings before taxes	827	936	2,417	2,085
Operating Segments
Net revenue:
Total net revenue	13,519	13,196	39,504	39,902
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total segment earnings from operations	1,286	1,354	3,965	3,958
Other
Net revenue:
Total net revenue	0	0	0	(1)
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Stock-based compensation expense	(96)	(91)	(367)	(353)
Restructuring and other charges	(46)	(75)	(180)	(416)
Acquisition and divestiture charges	(22)	(48)	(71)	(205)
Amortization of intangible assets	(81)	(91)	(242)	(262)
Interest and other, net	(113)	(16)	(410)	(357)
Corporate and unallocated costs and other
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Corporate and unallocated costs and other	(101)	(97)	(278)	(280)
Personal Systems | Operating Segments
Net revenue:
Total net revenue	9,369	8,932	26,604	26,286
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total segment earnings from operations	599	592	1,644	1,498
Printing | Operating Segments
Net revenue:
Total net revenue	4,143	4,263	12,886	13,611
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total segment earnings from operations	715	794	2,416	2,563
Corporate Investments | Operating Segments
Net revenue:
Total net revenue	7	1	14	5
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total segment earnings from operations	(28)	(32)	(95)	(103)
Commercial PS | Personal Systems | Operating Segments
Net revenue:
Total net revenue	6,677	6,201	18,964	18,499
Consumer PS | Personal Systems | Operating Segments
Net revenue:
Total net revenue	2,692	2,731	7,640	7,787
Supplies | Printing | Operating Segments
Net revenue:
Total net revenue	2,703	2,768	8,430	8,631
Commercial Printing | Printing | Operating Segments
Net revenue:
Total net revenue	1,147	1,208	3,579	3,969
Consumer Printing | Printing | Operating Segments
Net revenue:
Total net revenue	$ 293	$ 287	$ 877	$ 1,011