XML 90 R75.htm IDEA: XBRL DOCUMENT v3.7.0.1
Stockholders' Equity - Activity Related to Stock Options (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 12 Months Ended
Apr. 28, 2017
Apr. 29, 2016
Apr. 24, 2015
Number of Shares      
Beginning balance, Number of Shares 9 12 15
Options granted, Number of Shares     2
Options assumed in acquisition, Number of Shares   2  
Options exercised, Number of Shares (3) (2) (5)
Options forfeited and expired, Number of Shares (2) (3) 0
Ending balance, Number of Shares 4 9 12
Options Exercisable, Number of Shares 3    
Weighted-Average Exercise Price      
Beginning balance, Weighted-Average Exercise Price $ 34.01 $ 37.74 $ 34.10
Options granted, Weighted-Average Exercise Price     36.64
Options assumed in acquisition, Weighted-Average Exercise Price   5.20  
Options exercised, Weighted-Average Exercise Price 25.61 19.64 25.25
Options forfeited and expired, Weighted-Average Exercise Price 39.36 38.27 42.42
Ending balance, Weighted-Average Exercise Price 35.76 $ 34.01 $ 37.74
Options Exercisable, Weighted-Average Exercise Price $ 40.92    
Weighted-Average Remaining Contractual Term and Aggregate Intrinsic Value      
Outstanding, Weighted-Average Remaining Contractual Term 3 years 3 months    
Exercisable, Weighted-Average Remaining Contractual Term 2 years 4 months 21 days    
Outstanding, Aggregate Intrinsic Value $ 31    
Exercisable, Aggregate Intrinsic Value $ 11