Segment Information - Reconciliation of Segment Operating Results to Consolidated Results (Detail) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Net revenue:
Net revenue	$ 56,639	$ 58,756	$ 58,472
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total segment earnings from operations	3,462	3,877	3,831
Stock-based compensation expense	(278)	(297)	(268)
Restructuring and other charges	(462)	(275)	(132)
Acquisition-related charges	(16)	(35)	(123)
Amortization of intangible assets	(113)	(116)	(80)
Interest and other, net	(231)	(1,354)	(818)
Earnings before taxes	3,231	2,523	3,013
Operating segments
Net revenue:
Net revenue	56,640	58,762	58,471
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total segment earnings from operations	4,738	5,004	4,634
Corporate and unallocated costs and other
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Corporate and unallocated costs and other	(407)	(404)	(200)
Other
Net revenue:
Net revenue	(1)	(6)	1
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Stock-based compensation expense	(278)	(297)	(268)
Restructuring and other charges	(462)	(275)	(132)
Acquisition-related charges	(16)	(35)	(123)
Amortization of intangible assets	(113)	(116)	(80)
Interest and other, net	(231)	(1,354)	(818)
Personal Systems | Operating segments
Net revenue:
Net revenue	38,997	38,694	37,661
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total segment earnings from operations	2,312	1,898	1,402
Personal Systems | Notebooks | Operating segments
Net revenue:
Net revenue	25,766	22,928	22,547
Personal Systems | Desktops | Operating segments
Net revenue:
Net revenue	9,806	12,046	11,567
Personal Systems | Workstations | Operating segments
Net revenue:
Net revenue	1,816	2,389	2,246
Personal Systems | Other | Operating segments
Net revenue:
Net revenue	1,609	1,331	1,301
Printing | Operating segments
Net revenue:
Net revenue	17,641	20,066	20,805
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total segment earnings from operations	2,495	3,202	3,314
Printing | Supplies | Operating segments
Net revenue:
Net revenue	11,586	12,921	13,575
Printing | Commercial Hardware | Operating segments
Net revenue:
Net revenue	3,539	4,612	4,514
Printing | Consumer Hardware | Operating segments
Net revenue:
Net revenue	2,516	2,533	2,716
Corporate Investments | Operating segments
Net revenue:
Net revenue	2	2	5
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total segment earnings from operations	$ (69)	$ (96)	$ (82)