Segment Information - Reconciliation of Segment Operating Results to Consolidated Results (Detail) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Net revenue:
Net revenue	$ 58,472	$ 52,056	$ 48,238
Earnings from continuing operations before taxes:
Total segment earnings from operations	4,064	3,519	3,549
Stock-based compensation expense	(268)	(224)	(182)
Restructuring and other charges	(132)	(362)	(205)
Acquisition-related charges	(123)	(125)	(7)
Amortization of intangible assets	(80)	(1)	(16)
Defined benefit plan settlement charges	(7)	(5)	(179)
Interest and other, net	(1,051)	(243)	212
Earnings from continuing operations before taxes	3,013	3,276	3,761
Operating segments
Net revenue:
Net revenue	58,471	52,057	48,076
Earnings from continuing operations before taxes:
Total segment earnings from operations	4,652	4,269	4,166
Corporate and unallocated costs and other
Earnings from continuing operations before taxes:
Corporate and unallocated costs and other	22	(33)	(28)
Other
Net revenue:
Net revenue	1	(1)	162
Earnings from continuing operations before taxes:
Stock-based compensation expense	(268)	(224)	(182)
Restructuring and other charges	(132)	(362)	(205)
Acquisition-related charges	(123)	(125)	(7)
Amortization of intangible assets	(80)	(1)	(16)
Defined benefit plan settlement charges	(7)	(5)	(179)
Personal Systems | Operating segments
Net revenue:
Net revenue	37,661	33,321	29,946
Earnings from continuing operations before taxes:
Total segment earnings from operations	1,411	1,210	1,150
Printing | Operating segments
Net revenue:
Net revenue	20,805	18,728	18,123
Earnings from continuing operations before taxes:
Total segment earnings from operations	3,323	3,146	3,114
Corporate Investments | Operating segments
Net revenue:
Net revenue	5	8	7
Earnings from continuing operations before taxes:
Total segment earnings from operations	$ (82)	$ (87)	$ (98)