Consolidated Statements of Stockholders' Equity (USD $) In Millions, except Share data in Thousands, unless otherwise specified	Total HP Stockholders' Equity	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Non-controlling Interests	Total
Balance at Oct. 31, 2011	$ 38,625	$ 20	$ 6,837	$ 35,266	$ (3,498)	$ 379	$ 39,004
Balance (in shares) at Oct. 31, 2011		1,990,506
Increase (Decrease) in Stockholders' Equity
Net earnings (loss)	(12,650)			(12,650)			(12,650)
Other comprehensive income (loss)	(2,061)				(2,061)		(2,061)
Comprehensive income (loss)	(14,711)						(14,711)
Issuance of common stock in connection with employee stock plans and other	683		682	1			683
Issuance of common stock in connection with employee stock plans and other (in shares)		39,068
Repurchases of common stock	(1,626)		(1,525)	(101)			(1,626)
Repurchases of common stock (in shares)		(66,736)					(67,000)
Tax deficiency from employee stock plans	(175)		(175)				(175)
Cash dividends declared	(995)			(995)			(995)
Stock-based compensation expense	635		635				635
Changes in non-controlling interest						18	18
Balance at Oct. 31, 2012	22,436	20	6,454	21,521	(5,559)	397	22,833
Balance (in shares) at Oct. 31, 2012		1,962,838
Increase (Decrease) in Stockholders' Equity
Net earnings (loss)	5,113			5,113			5,113
Other comprehensive income (loss)	1,781				1,781		1,781
Comprehensive income (loss)	6,894						6,894
Issuance of common stock in connection with employee stock plans and other	208		210	(2)			208
Issuance of common stock in connection with employee stock plans and other (in shares)		22,950
Repurchases of common stock	(1,546)	(1)	(1,550)	5			(1,546)
Repurchases of common stock (in shares)		(77,905)					(77,000)
Tax deficiency from employee stock plans	(149)		(149)				(149)
Cash dividends declared	(1,074)			(1,074)			(1,074)
Stock-based compensation expense	500		500				500
Changes in non-controlling interest						(10)	(10)
Balance at Oct. 31, 2013	27,269	19	5,465	25,563	(3,778)	387	27,656
Balance (in shares) at Oct. 31, 2013		1,907,883					1,908,000
Increase (Decrease) in Stockholders' Equity
Net earnings (loss)	5,013			5,013			5,013
Other comprehensive income (loss)	(2,103)				(2,103)		(2,103)
Comprehensive income (loss)	2,910						2,910
Issuance of common stock in connection with employee stock plans and other	143		142	1			143
Issuance of common stock in connection with employee stock plans and other (in shares)		23,785
Repurchases of common stock	(2,957)	(1)	(2,694)	(262)			(2,957)
Repurchases of common stock (in shares)		(92,380)					(92,000)
Tax deficiency from employee stock plans	(43)		(43)				(43)
Cash dividends declared	(1,151)			(1,151)			(1,151)
Stock-based compensation expense	560		560				560
Changes in non-controlling interest						9	9
Balance at Oct. 31, 2014	$ 26,731	$ 18	$ 3,430	$ 29,164	$ (5,881)	$ 396	$ 27,127
Balance (in shares) at Oct. 31, 2014		1,839,288					1,839,000