Restructuring Charges and Asset Impairments (Changes in Restructuring Reserves) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 25, 2015	Oct. 26, 2014	Oct. 27, 2013
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 9	$ 39	$ 133
Provision for restructuring reserves	9	7	52
Consumption of reserves	(9)	(35)	(136)
Adjustment of restructuring reserves	(3)	(2)	(10)
Ending Balance	6	9	39
2012 Global Restructuring Plan | Severance and other employee-related costs
Restructuring Reserve [Roll Forward]
Beginning Balance	4	26	106
Provision for restructuring reserves	0	7	35
Consumption of reserves	(2)	(27)	(111)
Adjustment of restructuring reserves	(1)	(2)	(4)
Ending Balance	1	4	26
2012 EES Restructuring Plan | Severance and other employee-related costs
Restructuring Reserve [Roll Forward]
Beginning Balance	0	5	16
Provision for restructuring reserves	0	0	7
Consumption of reserves	0	(5)	(18)
Adjustment of restructuring reserves	0	0	0
Ending Balance	0	0	5
2012 EES Restructuring Plan | Contract cancellation and other costs
Restructuring Reserve [Roll Forward]
Beginning Balance	4	5	1
Provision for restructuring reserves	0	0	8
Consumption of reserves	(1)	(1)	(2)
Adjustment of restructuring reserves	(2)	0	(2)
Ending Balance	1	4	5
Others | Severance and other employee-related costs
Restructuring Reserve [Roll Forward]
Beginning Balance	0	2	5
Provision for restructuring reserves	8	0	2
Consumption of reserves	(5)	(2)	(5)
Adjustment of restructuring reserves	0	0	0
Ending Balance	3	0	2
Others | Contract cancellation and other costs
Restructuring Reserve [Roll Forward]
Beginning Balance	1	1	5
Provision for restructuring reserves	1	0	0
Consumption of reserves	(1)	0	0
Adjustment of restructuring reserves	0	0	(4)
Ending Balance	$ 1	$ 1	$ 1