Derivative Instruments and Hedging Activities (Gain/Loss Recognized in Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 26, 2015	Jul. 31, 2016	Jul. 26, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives not designated as hedging instruments	$ 0	$ (3)	$ 0	$ 89
Foreign exchange contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives not designated as hedging instruments	(31)	8	(67)	120
Foreign exchange contracts [Member] | Gain on derivatives associated with terminated business combination [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives not designated as hedging instruments	0	(3)	0	89
Foreign exchange contracts [Member] | General and administrative [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives not designated as hedging instruments	$ (31)	$ 11	$ (67)	$ 31