Derivative Instruments and Hedging Activities - Gain (Loss) on Derivatives in AOCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 26, 2020	Apr. 28, 2019	Apr. 26, 2020	Apr. 28, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Effective portion - gain (loss) recognized in AOCI		$ 60		$ 223
Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Effective portion - gain (loss) recognized in AOCI	$ (165)	11	$ (176)	(5)
Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Effective portion - gain (loss) recognized in AOCI				7,292
Foreign exchange contracts | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Effective portion - gain (loss) recognized in AOCI	(3)	11	4	(5)
Interest rate contracts | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Effective portion - gain (loss) recognized in AOCI	$ (162)	$ 0	$ (180)	$ 0