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Employee Benefit Plans (Summary Of Restricted Stock And Stock Unit Activity) (Details) - USD ($)
$ / shares in Units, $ in Millions
9 Months Ended 12 Months Ended
Apr. 28, 2018
Jul. 29, 2017
Restricted Stock/ Stock Units    
Assumed from acquisitions (in shares) 3,000,000 8,000,000
Weighted-Average Grant Date Fair Value per Share    
Assumed from acquisitions (in dollars per share) $ 8.20 $ 4.47
Restricted Stock/Stock Units    
Restricted Stock/ Stock Units    
Beginning balance (in shares) 141,000,000 145,000,000
Granted (in shares) 33,000,000 50,000,000
Assumed from acquisitions (in shares) 1,000,000 15,000,000
Vested (in shares) (43,000,000) (54,000,000)
Canceled/forfeited (in shares) (13,000,000) (15,000,000)
Ending balance (in shares) 119,000,000 141,000,000
Weighted-Average Grant Date Fair Value per Share    
Beginning balance (in dollars per share) $ 26.94 $ 24.26
Granted (in dollars per share) 33.82 27.89
Assumed from acquisitions (in dollars per share) 28.26 32.21
Vested (in dollars per share) 25.44 23.14
Canceled/forfeited (in dollars per share) 28.14 23.56
Ending balance (in dollars per share) $ 29.26 $ 26.94
Aggregate Fair Value $ 1,450 $ 1,701