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Industry Segment Operations (Segment Reconciling Items) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Oct. 27, 2019	Jul. 28, 2019	Apr. 28, 2019	Jan. 27, 2019	Oct. 28, 2018	Jul. 29, 2018	Apr. 29, 2018	Jan. 28, 2018	Oct. 27, 2019	Oct. 28, 2018	Oct. 29, 2017
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net Sales	$ 3,754	$ 3,562	$ 3,539	$ 3,753	$ 3,759	$ 4,162	$ 4,579	$ 4,205	$ 14,608	$ 16,705	$ 14,698
Share-based compensation									(263)	(258)	(220)
Income from operations									3,350	4,491	3,936
Corporate and Other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net Sales									76	76	98
Unallocated cost of products sold and expenses									(322)	(444)	(521)
Share-based compensation									(263)	(258)	(220)
Income from operations									$ (509)	$ (626)	$ (643)