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Segment Information - Schedule of Reconciliation of Segment Operating Results to HP Consolidated Results (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Segment Information
Net revenue	$ 14,710	$ 14,517
Total segment earnings from operations	926	913
Restructuring and other charges	(55)	(31)
Acquisition-related charges	(10)	(42)
Amortization of intangible assets	(29)	(20)
Interest and other, net	(26)	(8)
Earnings before taxes	900	905
Operating segments
Segment Information
Net revenue	14,714	14,517
Total segment earnings from operations	1,207	1,115
Other
Segment Information
Net revenue	(4)	0
Corporate and unallocated costs and other	(80)	(24)
Stock-based compensation expense	(107)	(85)
Restructuring and other charges	(55)	(31)
Acquisition-related charges	(10)	(42)
Amortization of intangible assets	(29)	(20)
Interest and other, net	(26)	(8)
Personal Systems | Operating segments
Segment Information
Net revenue	9,657	9,440
Total segment earnings from operations	410	335
Printing | Operating segments
Segment Information
Net revenue	5,056	5,076
Total segment earnings from operations	821	799
Corporate Investments | Operating segments
Segment Information
Net revenue	1	1
Total segment earnings from operations	$ (24)	$ (19)

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