Employee Benefit Plans (Fair Value of Plan Assets) (Details) - USD ($) $ in Millions	Oct. 25, 2020	Oct. 27, 2019	Oct. 28, 2018	Oct. 29, 2017
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	$ 431	$ 409	$ 365	$ 361
Total assets at fair value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	232	210
Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	177	160
Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	16	14
Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	39	36	$ 36
Assets measured at net asset value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	199	199
Equity securities | Total assets at fair value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	103	90
Equity securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	103	90
Equity securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	0	0
Equity securities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	0	0
Debt securities | Total assets at fair value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	72	70
Debt securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	72	70
Debt securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	0	0
Debt securities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	0	0
Insurance contracts | Total assets at fair value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	39	36
Insurance contracts | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	0	0
Insurance contracts | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	0	0
Insurance contracts | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	39	36
Other investments | Total assets at fair value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	16	14
Other investments | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	0	0
Other investments | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	16	14
Other investments | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	0	0
Cash | Total assets at fair value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	2	0
Cash | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	2	0
Cash | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	0	0
Cash | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan of assets	$ 0	$ 0