Segment Information - Reconciliation of Segment Operating Results to Consolidated Results (Detail) - USD ($) $ in Millions	12 Months Ended
Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Net revenue:
Net revenue	$ 58,756	$ 58,472	$ 52,056
Earnings before taxes:
Total segment earnings from operations	3,877	3,831	3,368
Stock-based compensation expense	(297)	(268)	(224)
Restructuring and other charges	(275)	(132)	(362)
Acquisition-related charges	(35)	(123)	(125)
Amortization of intangible assets	(116)	(80)	(1)
Interest and other, net	(1,354)	(818)	(92)
Earnings before taxes	2,523	3,013	3,276
Operating segments
Net revenue:
Net revenue	58,762	58,471	52,057
Earnings before taxes:
Total segment earnings from operations	5,004	4,634	4,261
Corporate and unallocated costs and other
Earnings before taxes:
Corporate and unallocated costs and other	(404)	(200)	(181)
Other
Net revenue:
Net revenue	(6)	1	(1)
Earnings before taxes:
Stock-based compensation expense	(297)	(268)	(224)
Restructuring and other charges	(275)	(132)	(362)
Acquisition-related charges	(35)	(123)	(125)
Amortization of intangible assets	(116)	(80)	(1)
Interest and other, net	(1,354)	(818)	(92)
Personal Systems \| Operating segments
Net revenue:
Net revenue	38,694	37,661	33,321
Earnings before taxes:
Total segment earnings from operations	1,898	1,402	1,206
Personal Systems \| Notebooks \| Operating segments
Net revenue:
Net revenue	22,928	22,547	19,782
Personal Systems \| Desktops \| Operating segments
Net revenue:
Net revenue	12,046	11,567	10,298
Personal Systems \| Workstations \| Operating segments
Net revenue:
Net revenue	2,389	2,246	2,042
Personal Systems \| Other \| Operating segments
Net revenue:
Net revenue	1,331	1,301	1,199
Printing \| Operating segments
Net revenue:
Net revenue	20,066	20,805	18,728
Earnings before taxes:
Total segment earnings from operations	3,202	3,314	3,142
Printing \| Supplies \| Operating segments
Net revenue:
Net revenue	12,921	13,575	12,524
Printing \| Commercial Hardware \| Operating segments
Net revenue:
Net revenue	4,612	4,514	3,792
Printing \| Consumer Hardware \| Operating segments
Net revenue:
Net revenue	2,533	2,716	2,412
Corporate Investments \| Operating segments
Net revenue:
Net revenue	2	5	8
Earnings before taxes:
Total segment earnings from operations	$ (96)	$ (82)	$ (87)

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