Restructuring Charges and Asset Impairments (Narrative) (Details) $ in Millions		12 Months Ended			18 Months Ended
	Oct. 03, 2012 positions	Oct. 25, 2015 USD ($)	Oct. 26, 2014 USD ($)	Oct. 27, 2013 USD ($)	Oct. 27, 2013 USD ($) positions	Oct. 26, 2015 USD ($)	Oct. 28, 2012 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges and asset impairments		$ 14	$ 5	$ 63
Restructuring charges and asset impairments		14	5	63
Restructuring reserve		6	9	39	$ 39		$ 133
2012 Global Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | positions	1,300
2012 Global Restructuring Plan | Severance and other employee-related costs
Restructuring Cost and Reserve [Line Items]
Cost incurred to date			150
Restructuring charges and asset impairments			5	39
Restructuring charges and asset impairments		(1)	5	39
Restructuring reserve		1	4	26	$ 26		106
2012 EES Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Cost incurred to date		87
Restructuring charges and asset impairments		(2)
Restructuring charges and asset impairments				26
2012 EES Restructuring Plan | Maximum
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | positions					300
2012 EES Restructuring Plan | Severance and other employee-related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges and asset impairments		0	0	8
Restructuring reserve		0	0	5	$ 5		16
2012 EES Restructuring Plan | Inventory-related Charges
Restructuring Cost and Reserve [Line Items]
Cost incurred to date		13
Others | Severance and other employee-related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges and asset impairments				2
Restructuring charges and asset impairments		9	0	2
Restructuring reserve		3	0	2	$ 2		$ 5
Others | Severance and other employee-related costs | Forecast
Restructuring Cost and Reserve [Line Items]
Restructuring reserve						$ 0
Energy and Environmental Solutions
Restructuring Cost and Reserve [Line Items]
Restructuring charges and asset impairments		15	$ 0	$ 25
Energy and Environmental Solutions | Others
Restructuring Cost and Reserve [Line Items]
Restructuring reserve		4
Energy and Environmental Solutions | Others | Severance and other employee-related costs
Restructuring Cost and Reserve [Line Items]
Restructuring reserve		3
Energy and Environmental Solutions | Others | Inventory-related Charges
Restructuring Cost and Reserve [Line Items]
Restructuring charges and asset impairments		35
Energy and Environmental Solutions | Others | Restructuring charge
Restructuring Cost and Reserve [Line Items]
Restructuring charges and asset impairments		17
Energy and Environmental Solutions | Others | Restructuring charge | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring reserve		45
Energy and Environmental Solutions | Others | Restructuring charge | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring reserve		$ 55