Goodwill - Schedule of Allocation and Changes in the Carrying Amount of Goodwill (Details) $ in Millions	9 Months Ended
Jul. 31, 2026 USD ($)
Goodwill [Roll Forward]
Goodwill beginning balance	$ 23,770
Goodwill reclassified as held for sale	(40)
Purchase price and other currency adjustments	177
Goodwill ending balance	23,907
Networking
Goodwill [Roll Forward]
Goodwill beginning balance	10,121
Goodwill reclassified as held for sale	0
Purchase price and other currency adjustments	183
Goodwill ending balance	10,304
Cloud & AI
Goodwill [Roll Forward]
Goodwill beginning balance	13,599
Goodwill reclassified as held for sale	0
Purchase price and other currency adjustments	0
Goodwill ending balance	13,599
Corporate Investments and Other
Goodwill [Roll Forward]
Goodwill beginning balance	50
Goodwill reclassified as held for sale	(40)
Purchase price and other currency adjustments	(6)
Goodwill ending balance	$ 4

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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+ Details