Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Name:	us-gaap_RestructuringCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Severance and Related Charges - Narrative (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	May 02, 2021	Jan. 31, 2021	Apr. 26, 2020	May 02, 2021	Apr. 26, 2020	Oct. 25, 2020
Restructuring Cost and Reserve [Line Items]
Provision for severance	$ 6		$ 0	$ 158	$ 0
Employee Severance
Restructuring Cost and Reserve [Line Items]
Provision for severance	6	$ 152
Restructuring reserve	$ 36	$ 147		$ 36		$ 0