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Segment Information - Reconciliation of Segment Operating Results (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Net revenue:
Net revenue	$ 27,784	$ 26,982	$ 29,135
(Loss) earnings before taxes:
Total segment earnings from operations	1,132	(329)	1,274
Stock-based compensation expense	(382)	(278)	(270)
Amortization of intangible assets	(354)	(379)	(267)
Impairment of goodwill	0	(865)	0
Transformation costs	(930)	(950)	(453)
Disaster (charge) recovery	(16)	(26)	7
Acquisition, disposition and other related charges	(36)	(80)	(757)
Interest and other, net	(211)	(215)	(177)
Tax indemnification and related adjustments	65	(101)	377
Non-service net periodic benefit credit	70	136	59
Litigation judgment	2,351	0	0
Earnings from equity interests	180	67	20
Earnings (loss) before (provision) benefit for taxes	3,587	(442)	1,553
Operating segments
Net revenue:
Net revenue	28,287	27,580	29,750
(Loss) earnings before taxes:
Total segment earnings from operations	3,133	2,520	3,305
Elimination of intersegment net revenue
Net revenue:
Net revenue	(503)	(598)	(615)
Segment Reconciling Items
(Loss) earnings before taxes:
Unallocated corporate costs and eliminations	(285)	(238)	(286)
Stock-based compensation expense	(372)	(274)	(268)
Amortization of initial direct costs	(8)	(10)	0
Amortization of intangible assets	(354)	(379)	(267)
Impairment of goodwill	0	(865)	0
Transformation costs	(930)	(950)	(453)
Disaster (charge) recovery	(16)	(26)	7
Acquisition, disposition and other related charges	(36)	(107)	(764)
Interest and other, net	(211)	(215)	(177)
Tax indemnification and related adjustments	65	(101)	377
Non-service net periodic benefit credit	70	136	59
Litigation judgment	2,351	0	0
Earnings from equity interests	$ 180	$ 67	$ 20

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