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Balance Sheet Detail Balance Sheet Account Detail (Restructuring Charges and Asset Impairments) (Details) - USD ($)
$ in Millions
 12 Months Ended
Oct. 25, 2015
Oct. 26, 2014
Oct. 27, 2013
Restructuring Cost and Reserve [Line Items]      
Restructuring charges and asset impairments $ 14 $ 5 $ 63
2012 EES Restructuring Plan      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges and asset impairments (2)    
2012 EES Restructuring Plan | Asset Impairments      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges and asset impairments $ 4   $ 12