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, 2025	Apr. 30, 2024	Apr. 30, 2025	Apr. 30, 2024
Net revenue:
Total net revenue	$ 13,220	$ 12,800	$ 26,724	$ 25,985
Earnings before taxes:
Total segment earnings from operations	654	952	1,499	1,887
Restructuring and other charges	(122)	(71)	(192)	(134)
Acquisition and divestiture charges	(17)	(22)	(23)	(49)
Amortization of intangible assets	(65)	(80)	(128)	(161)
Interest and other, net	(148)	(155)	(289)	(297)
Earnings before taxes	506	797	1,210	1,590
Operating Segments
Net revenue:
Total net revenue	13,221	12,799	26,725	25,985
Earnings before taxes:
Total segment earnings from operations	1,186	1,307	2,476	2,679
Other
Net revenue:
Total net revenue	(1)	1	(1)	0
Earnings before taxes:
Stock-based compensation expense	(140)	(94)	(332)	(271)
Restructuring and other charges	(122)	(71)	(192)	(134)
Acquisition and divestiture charges	(17)	(22)	(23)	(49)
Amortization of intangible assets	(65)	(80)	(128)	(161)
Certain litigation charges	(103)	0	(103)	0
Interest and other, net	(148)	(155)	(289)	(297)
Corporate and unallocated costs and other
Earnings before taxes:
Corporate and unallocated costs and other	(85)	(88)	(199)	(177)
Personal Systems | Operating Segments
Net revenue:
Total net revenue	9,024	8,426	18,248	17,235
Earnings before taxes:
Total segment earnings from operations	409	508	916	1,045
Printing | Operating Segments
Net revenue:
Total net revenue	4,181	4,368	8,450	8,743
Earnings before taxes:
Total segment earnings from operations	814	829	1,624	1,701
Corporate Investments | Operating Segments
Net revenue:
Total net revenue	16	5	27	7
Earnings before taxes:
Total segment earnings from operations	(37)	(30)	(64)	(67)
Commercial PS | Personal Systems | Operating Segments
Net revenue:
Total net revenue	6,786	6,242	13,431	12,287
Consumer PS | Personal Systems | Operating Segments
Net revenue:
Total net revenue	2,238	2,184	4,817	4,948
Supplies | Printing | Operating Segments
Net revenue:
Total net revenue	2,725	2,864	5,551	5,727
Commercial Printing | Printing | Operating Segments
Net revenue:
Total net revenue	1,167	1,205	2,311	2,432
Consumer Printing | Printing | Operating Segments
Net revenue:
Total net revenue	$ 289	$ 299	$ 588	$ 584