Segment Information - Schedule of Reconciliation of Segment Operating Results to HP Consolidated Results (Details) - USD ($) $ in Millions	3 Months Ended						6 Months Ended		9 Months Ended
	Jul. 31, 2023	Apr. 30, 2023	Jan. 31, 2023	Jul. 31, 2022	Apr. 30, 2022	Jan. 31, 2022	Apr. 30, 2023	Apr. 30, 2022	Jul. 31, 2023	Jul. 31, 2022
Net revenue:
Total net revenue	$ 13,196	$ 12,907	$ 13,798	$ 14,648	$ 16,475	$ 17,013	$ 26,705	$ 33,488	$ 39,901	$ 48,136
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Operating Income (Loss)	952	747	743	1,256	1,257	1,305	1,490	2,562	2,442	3,818
Restructuring and other charges	(75)			(13)	(67)			(135)	(416)	(148)
Acquisition and divestiture charges	(48)			(31)					(205)	(83)
Amortization of intangible assets	(91)			(50)					(262)	(154)
Russia exit charges	0			(23)					0	(23)
Interest and other, net	(16)		(181)	(70)	(41)	(30)		(71)	(357)	(141)
Earnings before taxes	936	$ 587	$ 562	1,186	$ 1,216	$ 1,275	$ 1,149	$ 2,491	2,085	3,677
Operating Segments
Net revenue:
Total net revenue	13,196			14,648					39,902	48,141
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Operating Income (Loss)	1,354			1,519					3,958	4,872
Corporate and unallocated costs and other
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Corporate and unallocated costs and other	(97)			(76)					(279)	(373)
Other
Net revenue:
Total net revenue	0			0					(1)	(5)
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Stock-based compensation expense	(91)			(70)					(353)	(273)
Restructuring and other charges	(75)			(13)					(416)	(148)
Acquisition and divestiture charges	(48)			(31)					(206)	(83)
Amortization of intangible assets	(91)			(50)					(262)	(154)
Russia exit charges	0			(23)					0	(23)
Interest and other, net	(16)			(70)					(357)	(141)
Personal Systems | Operating Segments
Net revenue:
Total net revenue	8,932			10,073					26,286	33,771
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Operating Income (Loss)	592			673					1,498	2,331
Printing | Operating Segments
Net revenue:
Total net revenue	4,263			4,575					13,611	14,369
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Operating Income (Loss)	794			904					2,563	2,725
Corporate Investments | Operating Segments
Net revenue:
Total net revenue	1			0					5	1
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Operating Income (Loss)	(32)			(58)					(103)	(184)
Commercial PS | Personal Systems | Operating Segments
Net revenue:
Total net revenue	6,201			6,956					18,499	22,600
Consumer PS | Personal Systems | Operating Segments
Net revenue:
Total net revenue	2,731			3,117					7,787	11,171
Supplies | Printing | Operating Segments
Net revenue:
Total net revenue	2,768			2,814					8,631	9,013
Commercial Printing | Printing | Operating Segments
Net revenue:
Total net revenue	974			1,036					3,119	3,117
Consumer Printing | Printing | Operating Segments
Net revenue:
Total net revenue	$ 521			$ 725					$ 1,861	$ 2,239