Segment Information - Earnings Before Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Segment Reporting Information
Net revenue	$ 12,210	$ 13,057	$ 37,645	$ 38,659
Total segment earnings from operations	2,497	244	3,373	1,404
Stock-based compensation expense	(149)	(117)	(452)	(353)
Amortization of intangible assets	(210)	(225)	(629)	(632)
Restructuring charges	(369)	(24)	(841)	(404)
Acquisition and other related charges	(37)	(46)	(127)	(69)
Separation costs	(135)	(255)	(305)	(458)
Defined benefit plan settlement charges	0	(178)	0	(178)
Impairment of data center assets	0	(136)	0	(136)
Gain on H3C divestiture			2,169	0
Interest and other, net	(18)	4	(212)	(42)
Loss from equity interests	(72)	0	(72)	(2)
Total Hewlett Packard Enterprise consolidated and combined earnings before taxes	2,407	248	3,089	1,360
Operating segments
Segment Reporting Information
Net revenue	12,751	13,692	39,344	40,419
Total segment earnings from operations	1,336	1,329	3,967	3,924
Elimination of intersegment net revenue and other
Segment Reporting Information
Net revenue	541	635	1,699	1,760
Significant Reconciling Items
Segment Reporting Information
Corporate and unallocated costs and eliminations	(128)	(104)	(429)	(290)
Stock-based compensation expense	(129)	(117)	(432)	(353)
Amortization of intangible assets	(210)	(225)	(629)	(632)
Restructuring charges	(369)	(24)	(841)	(404)
Acquisition and other related charges	(37)	(46)	(127)	(69)
Separation costs	(135)	(255)	(305)	(458)
Defined benefit plan settlement charges	0	(178)	0	(178)
Impairment of data center assets	0	(136)	0	(136)
Gain on H3C divestiture	2,169	0	2,169	0
Interest and other, net	(18)	4	(212)	(42)
Loss from equity interests	$ (72)	$ 0	$ (72)	$ (2)