Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Acquisitions - Narrative (Details) $ in Millions				1 Months Ended	12 Months Ended
Acquisitions - Narrative (Details) $ in Millions	Aug. 31, 2021 USD ($)	Sep. 21, 2020 USD ($)	Sep. 25, 2019 USD ($)	Aug. 31, 2021 USD ($)	Oct. 31, 2021 USD ($) businessAcquired	Oct. 31, 2020 USD ($) businessAcquired	Oct. 31, 2019 USD ($) businessAcquired
Acquisitions:
Number of acquisitions \| businessAcquired					4	2	3
Goodwill					$ 18,306	$ 18,017	$ 18,306
Zerto
Acquisitions:
Total fair value of consideration	$ 416			$ 416
Goodwill	214			214
Amortizable intangible assets	$ 208			208
Weighted-average useful life	7 years
Silver Peak
Acquisitions:
Total fair value of consideration		$ 879
Goodwill	$ 561			561
Amortizable intangible assets	$ 348			$ 348
Weighted-average useful life		5 years
Cray Inc.
Acquisitions:
Total fair value of consideration			$ 1,500
Goodwill			$ 702
Weighted-average useful life			4 years
Cray Inc. \| Intangible Assets
Acquisitions:
Amortizable intangible assets			$ 425
Cray Inc. \| In-process research and development
Acquisitions:
Amortizable intangible assets			$ 141