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Segment Information (Detail 2) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
Segment Information (Detail 2) - USD ($) $ in Millions	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
Segment Reporting Information
Net revenue	$ 7,946	$ 7,764	$ 7,468	$ 7,674	$ 7,660	$ 7,501	$ 6,808	$ 6,902	$ 30,852	$ 28,871	$ 30,280
Segment earnings (loss) from operations	684	516	397	261	(224)	201	195	453	1,858	625	3,903
Unallocated stock-based compensation expense									(309)	(454)	(408)
Amortization of intangible assets	(72)	(72)	(72)	(78)	(86)	(97)	(72)	(66)	(294)	(321)	(272)
Impairment of goodwill	(88)	0	0	0					(88)	0	0
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
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
Gain on H3C and MphasiS divestitures									0	0	2,420
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
Earnings (loss) 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
Assets	55,493				61,406				55,493	61,406
Hybrid IT
Segment Reporting Information
Net revenue									24,285	22,740	23,954
Intelligent Edge
Segment Reporting Information
Net revenue									2,912	2,554	2,635
Financial Services
Segment Reporting Information
Net revenue									3,656	3,574	3,097
Corporate Investments
Segment Reporting Information
Net revenue									(1)	3	594
Operating segments
Segment Reporting Information
Net revenue									31,632	29,816	31,560
Segment earnings (loss) from operations									3,091	2,720	3,533
Operating segments \| Hybrid IT
Segment Reporting Information
Net revenue									25,033	23,627	25,102
Segment earnings (loss) from operations									2,654	2,274	3,182
Assets	25,839				25,923				25,839	25,923
Operating segments \| Intelligent Edge
Segment Reporting Information
Net revenue									2,929	2,584	2,674
Segment earnings (loss) from operations									237	253	74
Assets	2,990				3,002				2,990	3,002
Operating segments \| Financial Services
Segment Reporting Information
Net revenue									3,671	3,602	3,190
Segment earnings (loss) from operations									290	299	338
Assets	13,746				13,470				13,746	13,470
Operating segments \| Corporate Investments
Segment Reporting Information
Net revenue									(1)	3	594
Segment earnings (loss) from operations									(90)	(106)	(61)
Assets	170				161				170	161
Eliminations of inter-segment net revenue and other
Segment Reporting Information
Net revenue									780	945	1,280
Eliminations of inter-segment net revenue and other \| Hybrid IT
Segment Reporting Information
Net revenue									748	887	1,148
Eliminations of inter-segment net revenue and other \| Intelligent Edge
Segment Reporting Information
Net revenue									17	30	39
Eliminations of inter-segment net revenue and other \| Financial Services
Segment Reporting Information
Net revenue									15	28	93
Eliminations of inter-segment net revenue and other \| Corporate Investments
Segment Reporting Information
Net revenue									0	0	0
Significant Reconciling Items
Segment Reporting Information
Unallocated corporate costs and eliminations									(240)	(408)	(720)
Unallocated stock-based compensation expense									(73)	(110)	(134)
Amortization of intangible assets									(294)	(321)	(272)
Impairment of goodwill									(88)	0	0
Restructuring charges									(19)	(417)	(417)
Transformation costs									(425)	(359)	0
Disaster charges									0	(93)	0
Acquisition and other related charges									(82)	(203)	(145)
Separation costs									(12)	(248)	(362)
Defined benefit plan settlement charges and remeasurement (benefit)									0	64	0
Gain on H3C and MphasiS divestitures									0	0	(2,420)
Interest and other, net									(274)	(327)	(284)
Tax indemnification adjustments									(1,354)	(3)	317
Earnings (loss) from equity interests									38	(23)	$ (76)
Corporate and unallocated assets
Segment Reporting Information
Assets	$ 12,748				$ 18,850				$ 12,748	$ 18,850