Income Taxes (Valuation Allowance) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 28, 2018	Oct. 29, 2017	Oct. 30, 2016
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Increases	$ 0	$ 0	$ 3
Decreases	(1)	(17)	(1)
Valuation Allowance of Deferred Tax Assets
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	227	207	207
Increases	8	20	27
Decreases	(5)	0	(27)
Ending balance	$ 230	$ 227	$ 207