Quarterly Summary (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions			3 Months Ended								12 Months Ended
	Feb. 22, 2018	Feb. 21, 2018	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2018	Oct. 31, 2017	Jul. 31, 2017	Apr. 30, 2017	Jan. 31, 2017	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Net revenue			$ 7,946	$ 7,764	$ 7,468	$ 7,674	$ 7,660	$ 7,501	$ 6,808	$ 6,902	$ 30,852	$ 28,871	$ 30,280
Cost of sales			5,489	5,384	5,196	5,491	5,383	5,306	4,799	4,689
Research and development			439	434	402	388	364	390	376	356	1,663	1,486	1,714
Selling, general and administrative			1,219	1,203	1,227	1,202	1,288	1,285	1,229	1,204	4,851	5,006	5,380
Amortization of intangible assets			72	72	72	78	86	97	72	66	294	321	272
Restructuring charges			5	2	9	3	113	152	69	83	19	417	417
Transformation costs			(74)	131	123	245	328	31	0	0	425	359	0
Disaster charges							93	0	0	0	0	93	0
Impairment of goodwill			88	0	0	0					88	0	0
Acquisition and other related charges			12	24	16	30	53	56	50	44	82	203	145
Separation costs			12	(2)	26	(24)	202	5	30	11	12	248	362
Defined benefit plan settlement charges and remeasurement (benefit)							(26)	(22)	(12)	(4)	0	(64)	0
Total costs and expenses			7,262	7,248	7,071	7,413	7,884	7,300	6,613	6,449	28,994	28,246	26,377
Segment earnings (loss) from operations			684	516	397	261	(224)	201	195	453	1,858	625	3,903
Interest and other, net			(111)	(64)	(78)	(21)	(76)	(87)	(86)	(78)	(274)	(327)	(284)
Tax indemnification adjustments			(12)	2	(425)	(919)	(2)	10	7	(18)	(1,354)	(3)	317
(Loss) earnings from equity interests			15	11	(10)	22	1	1	(3)	(22)	38	(23)	(76)
Total Hewlett Packard Enterprise consolidated earnings from continuing operations before taxes			576	465	(116)	(657)	(301)	125	113	335	268	272	3,860
Income tax expense			(1,348)	(13)	966	2,139	679	160	(591)	(84)	1,744	164	(623)
Net earnings (loss) from continuing operations			(772)	452	850	1,482	378	285	(478)	251	2,012	436	3,237
Net earnings (loss) from discontinued operations			15	(1)	(72)	(46)	146	(120)	(134)	16	(104)	(92)	(76)
Net earnings			$ (757)	$ 451	$ 778	$ 1,436	$ 524	$ 165	$ (612)	$ 267	$ 1,908	$ 344	$ 3,161
Continuing operations (in dollars per share)			$ (0.53)	$ 0.30	$ 0.55	$ 0.93	$ 0.23	$ 0.17	$ (0.29)	$ 0.15	$ 1.32	$ 0.26	$ 1.89
Discontinued operations (in dollars per share)			0.01	0.00	(0.05)	(0.03)	0.09	(0.07)	(0.08)	0.01	(0.07)	(0.05)	(0.05)
Total basic net earnings (loss) per share (in dollars per share)			(0.52)	0.30	0.50	0.90	0.32	0.10	(0.37)	0.16	1.25	0.21	1.84
Continuing operations (in dollars per share)			(0.53)	0.29	0.54	0.92	0.23	0.17	(0.29)	0.15	1.30	0.26	1.86
Discontinued operations (in dollars per share)			0.01	0.00	(0.05)	(0.03)	0.09	(0.07)	(0.08)	0.01	(0.07)	(0.05)	(0.04)
Total diluted net earnings (loss) per share (in dollars per share)			(0.52)	0.29	0.49	0.89	0.32	0.10	(0.37)	0.16	1.23	0.21	1.82
Cash dividends declared per share (in dollars per share)	$ 0.1125	$ 0.075	$ 0.1125	$ 0.1125	$ 0.1125	$ 0.15	$ 0	$ 0.065	$ 0.065	$ 0.13	$ 0.4875	$ 0.26	$ 0.22
Basic (in shares)			1,459	1,513	1,552	1,591	1,618	1,641	1,658	1,669	1,529	1,646	1,715
Diluted (in shares)			1,459	1,531	1,582	1,619	1,647	1,667	1,658	1,700	1,553	1,674	1,739