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Pension And Postretirement Benefits (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Apr. 27, 2014
Apr. 28, 2013
Apr. 27, 2014
Apr. 28, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Pension Contributions     $ 45 $ 83
Pension Plan, Defined Benefit [Member]
       
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements (18) 0 (18) 0
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments 0 0 0 (3)
U.S. Pension Plans [Member]
       
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Pension Contributions     35  
Non U.S. Pension Plans [Member]
       
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Pension Contributions     10  
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year     $ 1