Consolidated Statements of Stockholders' (Deficit) Equity - USD ($) shares in Thousands, $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings (Deficit)	Accumulated Other Comprehensive Loss	Total HP Stockholders’ Equity (Deficit)	Non- controlling Interests of Discontinued Operations
Balance (in shares) at Oct. 31, 2014		1,839,288
Balance at Oct. 31, 2014	$ 27,127	$ 18	$ 3,430	$ 29,164	$ (5,881)	$ 26,731	$ 396
Increase (Decrease) in Stockholders' Equity
Net earnings	4,554			4,554		4,554
Other comprehensive income, net of taxes	(421)				(421)	(421)
Comprehensive income	4,133					4,133
Issuance of common stock in connection with employee stock plans and other (in shares)		39,834
Issuance of common stock in connection with employee stock plans and other	$ (33)		(34)	1		(33)
Repurchases of common stock (in shares)	(75,000)	(75,403)
Issuance of common stock in connection with employee stock plans and other	$ (2,648)		(2,237)	(411)		(2,648)
Assumption of equity awards in connection with acquisitions	31		31			31
Tax benefit (deficiency) from employee stock plans	64		64			64
Cash dividends declared	(1,219)			(1,219)		(1,219)
Stock-based compensation expense	709		709			709
Changes in non-controlling interest	(13)						(13)
Balance (in shares) at Oct. 31, 2015		1,803,719
Balance at Oct. 31, 2015	28,151	$ 18	1,963	32,089	(6,302)	27,768	383
Increase (Decrease) in Stockholders' Equity
Separation of Hewlett Packard Enterprise	(32,527)			(37,225)	5,081	(32,144)	(383)
Net earnings	2,496			2,496		2,496
Other comprehensive income, net of taxes	(217)				(217)	(217)
Comprehensive income	2,279					2,279
Issuance of common stock in connection with employee stock plans and other (in shares)		8,227
Issuance of common stock in connection with employee stock plans and other	$ 29		29			29
Repurchases of common stock (in shares)	(100,000)	(99,855)
Issuance of common stock in connection with employee stock plans and other	$ (1,145)	$ (1)	(1,144)			(1,145)
Cash dividends declared	(858)			(858)		(858)
Stock-based compensation expense	$ 182		182			182
Balance (in shares) at Oct. 31, 2016	1,712,000	1,712,091
Balance at Oct. 31, 2016	$ (3,889)	$ 17	1,030	(3,498)	(1,438)	(3,889)	0
Increase (Decrease) in Stockholders' Equity
Net earnings	2,526			2,526		2,526
Other comprehensive income, net of taxes	20				20	20
Comprehensive income	2,546					2,546
Issuance of common stock in connection with employee stock plans and other (in shares)		18,532
Issuance of common stock in connection with employee stock plans and other	$ 52		52			52
Repurchases of common stock (in shares)	(80,000)	(81,043)
Issuance of common stock in connection with employee stock plans and other	$ (1,447)	$ (1)	(926)	(520)		(1,447)
Cash dividends declared	(894)			(894)		(894)
Stock-based compensation expense	$ 224		224			224
Balance (in shares) at Oct. 31, 2017	1,650,000	1,649,580
Balance at Oct. 31, 2017	$ (3,408)	$ 16	$ 380	$ (2,386)	$ (1,418)	$ (3,408)	$ 0