Net Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended		9 Months Ended
		Nov. 01, 2015	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Numerator:
Net earnings			$ 2,272	$ 224	$ 2,859	$ 1,076
Denominator:
Weighted-average shares used to compute basic net EPS (in shares)	[1]		1,681,000,000	1,804,000,000	1,722,000,000	1,804,000,000
Dilutive effect of employee stock plans (in shares)			34,000,000	30,000,000	26,000,000	30,000,000
Weighted-average shares used to compute diluted net EPS (in shares)	[1]		1,715,000,000	1,834,000,000	1,748,000,000	1,834,000,000
Net earnings per share:
Basic (in dollars per share)	[1]		$ 1.35	$ 0.13	$ 1.66	$ 0.60
Diluted (in dollars per share)	[1]		$ 1.32	$ 0.13	$ 1.64	$ 0.59
Anti-dilutive weighted average stock awards (in shares)			25,000,000	28,000,000	44,000,000	28,000,000
Former Parent Company
Net earnings per share:
Shares distributed (in shares)		1

[1] On November 1, 2015, HP Inc. distributed a total of 1.8 billion shares of Hewlett Packard Enterprise common stock to HP Inc. stockholders as of the record date. For comparative purposes, the same number of shares used to compute basic and diluted net earnings per share ("EPS") for the fiscal year ended October 31, 2015 is used for the calculation of basic and diluted net EPS for all periods in fiscal 2015. See Note 16, "Net Earnings Per Share", for further details.