Segment Information - Schedule of Reconciliation of Segment Operating Results to HP Consolidated Results (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2025	Jan. 31, 2024
Net revenue:
Total net revenue	$ 13,504	$ 13,185
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total segment earnings from operations	845	935
Restructuring and other charges	(70)	(63)
Acquisition and divestiture charges	(6)	(27)
Amortization of intangible assets	(63)	(81)
Interest and other, net	(141)	(142)
Earnings before taxes	704	793
Operating Segments
Net revenue:
Total net revenue	13,504	13,186
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total segment earnings from operations	1,290	1,372
Other
Net revenue:
Total net revenue	0	(1)
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Stock-based compensation expense	(192)	(177)
Restructuring and other charges	(70)	(63)
Acquisition and divestiture charges	(6)	(27)
Amortization of intangible assets	(63)	(81)
Interest and other, net	(141)	(142)
Corporate and unallocated costs and other
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Corporate and unallocated costs and other	(114)	(89)
Personal Systems | Operating Segments
Net revenue:
Total net revenue	9,224	8,809
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total segment earnings from operations	507	537
Printing | Operating Segments
Net revenue:
Total net revenue	4,269	4,375
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total segment earnings from operations	810	872
Corporate Investments | Operating Segments
Net revenue:
Total net revenue	11	2
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total segment earnings from operations	(27)	(37)
Commercial PS | Personal Systems | Operating Segments
Net revenue:
Total net revenue	6,645	6,045
Consumer PS | Personal Systems | Operating Segments
Net revenue:
Total net revenue	2,579	2,764
Supplies | Printing | Operating Segments
Net revenue:
Total net revenue	2,826	2,863
Commercial Printing | Printing | Operating Segments
Net revenue:
Total net revenue	1,144	1,227
Consumer Printing | Printing | Operating Segments
Net revenue:
Total net revenue	$ 299	$ 285