Segment Information - Schedule of Reconciliation of Segment Operating Results to HP Consolidated Results (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021
Segment Information
Net revenue	$ 16,490	$ 15,877	$ 33,518	$ 31,523
Total segment earnings from operations	1,278	1,362	2,637	2,683
Restructuring and other charges	(82)	(39)	(150)	(160)
Acquisition-related charges	(32)	(10)	(52)	(16)
Amortization of intangible assets	(52)	(32)	(104)	(61)
Interest and other, net	(39)	(26)	(71)	(51)
Total earnings before taxes	1,239	1,336	2,566	2,632
Operating segments
Segment Information
Net revenue	16,495	15,879	33,523	31,526
Total segment earnings from operations	1,704	1,626	3,466	3,355
Other
Segment Information
Net revenue	(5)	(2)	(5)	(3)
Corporate and unallocated costs and other	(190)	(108)	(320)	(244)
Stock-based compensation expense	(70)	(75)	(203)	(191)
Restructuring and other charges	(82)	(39)	(150)	(160)
Acquisition-related charges	(32)	(10)	(52)	(16)
Amortization of intangible assets	(52)	(32)	(104)	(61)
Interest and other, net	(39)	(26)	(71)	(51)
Personal Systems | Operating segments
Segment Information
Net revenue	11,532	10,555	23,728	21,158
Total segment earnings from operations	798	710	1,755	1,468
Printing | Operating segments
Segment Information
Net revenue	4,963	5,323	9,794	10,367
Total segment earnings from operations	958	951	1,837	1,949
Corporate Investments | Operating segments
Segment Information
Net revenue	0	1	1	1
Total segment earnings from operations	(52)	(35)	(126)	(62)
Notebooks | Personal Systems | Operating segments
Segment Information
Net revenue	7,734	7,489	16,155	14,855
Desktops | Personal Systems | Operating segments
Segment Information
Net revenue	2,855	2,225	5,662	4,625
Workstations | Personal Systems | Operating segments
Segment Information
Net revenue	494	407	1,028	789
Other | Personal Systems | Operating segments
Segment Information
Net revenue	449	434	883	889
Supplies | Printing | Operating segments
Segment Information
Net revenue	3,131	3,337	6,199	6,483
Commercial | Printing | Operating segments
Segment Information
Net revenue	1,042	1,085	2,081	2,042
Consumer | Printing | Operating segments
Segment Information
Net revenue	$ 790	$ 901	$ 1,514	$ 1,842