Segment Information - Schedule of Reconciliation of Segment Operating Results to HP Consolidated Results (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Segment Information
Net revenue	$ 14,517	$ 12,684
Total segment earnings from operations	973	856
Stock-based compensation expense	(85)	(75)
Restructuring and other charges	(31)	(63)
Acquisition-related charges	(42)	(16)
Amortization of intangible assets	(20)	0
Interest and other, net	(68)	(81)
Earnings before taxes	905	775
Operating segments
Segment Information
Net revenue	14,517	12,682
Total segment earnings from operations	1,119	1,003
Other
Segment Information
Net revenue	0	2
Corporate and unallocated costs and other	33	7
Stock-based compensation expense	(85)	(75)
Restructuring and other charges	(31)	(63)
Acquisition-related charges	(42)	(16)
Amortization of intangible assets	(20)	0
Defined benefit plan settlement charges	(1)	0
Interest and other, net	$ (68)	$ (81)