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Noncontrolling Interests (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Aug. 03, 2014
Apr. 27, 2014
Jan. 26, 2014
Oct. 27, 2013
Jul. 28, 2013
Apr. 28, 2013
Jan. 27, 2013
Oct. 28, 2012
Aug. 03, 2014
Jul. 28, 2013
Jul. 29, 2012
Noncontrolling Interest [Line Items]                      
Payments to Acquire Interest in Joint Venture                 $ 7 $ 5  
Contribution from noncontrolling interest                 5 3 2
Restructuring charges, after tax 15 1 5 15 19 14 30 27      
CHINA
                     
Noncontrolling Interest [Line Items]                      
Controlling interest in a company 60.00%               60.00%    
Malaysia [Member]
                     
Noncontrolling Interest [Line Items]                      
Controlling interest in a company 70.00%               70.00%    
Noncontrolling Interests [Member]
                     
Noncontrolling Interest [Line Items]                      
Contribution from noncontrolling interest                 5 3 2
2014 Initiatives [Member]
                     
Noncontrolling Interest [Line Items]                      
Restructuring charges, after tax                 33    
2014 Initiatives [Member] | Noncontrolling Interests [Member]
                     
Noncontrolling Interest [Line Items]                      
Restructuring charges, after tax                 $ 5