Segment Information - Reconciliation of Segment Operating Results (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Net revenue:
Net revenue	$ 7,674	$ 6,902
Earnings before taxes:
Total segment earnings from operations	261	453
Amortization of intangible assets	(78)	(66)
Restructuring charges	(3)	(83)
Transformation costs	(245)	0
Acquisition and other related charges	(30)	(44)
Separation costs	24	(11)
Interest and other, net	(21)	(78)
Tax indemnification adjustments	(919)	(18)
Earnings (loss) from equity interests	22	(22)
(Loss) earnings from continuing operations before taxes	(657)	335
Operating Segment
Net revenue:
Net revenue	7,838	7,148
Earnings before taxes:
Total segment earnings from operations	677	792
Elimination of intersegment net revenue and other
Net revenue:
Net revenue	164	246
Segment Reconciling Items
Earnings before taxes:
Unallocated corporate costs and eliminations	(54)	(96)
Unallocated stock-based compensation expense	(30)	(43)
Amortization of intangible assets	(78)	(66)
Restructuring charges	(3)	(83)
Transformation costs	(245)	0
Acquisition and other related charges	(30)	(44)
Separation costs	24	(11)
Defined benefit plan settlement charges and remeasurement (benefit)	0	4
Interest and other, net	(21)	(78)
Tax indemnification adjustments	(919)	(18)
Earnings (loss) from equity interests	$ 22	$ (22)