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Shareholders' Equity (Details)
$ / shares in Units, $ in Thousands
 12 Months Ended
Apr. 28, 2017
USD ($)
$ / shares
shares
Apr. 29, 2016
$ / shares
shares
Jun. 26, 2017
shares
Apr. 28, 2017
€ / shares
shares
Jun. 30, 2015
shares
Class of Stock [Line Items]          
Common stock, authorized (shares) 2,600,000,000 2,600,000,000   2,600,000,000  
Common stock, par value (in dollars per share) | $ / shares $ 0.0001 $ 0.0001      
Deferred stock, shares authorized 40,000     40,000  
Deferred stock, par value (in euros per share) | € / shares       € 1.00  
Deferred stock, issued (shares) 0     0  
Deferred stock, outstanding (shares) 0     0  
Preferred stock, authorized (shares) 127,500,000.0     127,500,000.0  
Preferred stock, par value (in dollars per share) | $ / shares $ 0.20        
Preferred stock, issued (shares) 0     0  
Preferred stock, outstanding (shares) 0     0  
Stock issued to advisors (shares) 624        
Stock issued during period (shares) 1,872        
Stock issued during period | $ $ 75        
June 2015 Share Repurchase Program          
Class of Stock [Line Items]          
Shares repurchased (shares) 43,000,000 38,000,000      
Average repurchase price (in dollars per share) | $ / shares $ 83.03 $ 74.92      
Common stock authorized to be repurchased (shares) 80,000,000     80,000,000 80,000,000
Number of shares repurchased to date 51,000,000     51,000,000  
Common stock available for future repurchases (shares) 29,000,000     29,000,000  
Series A Preferred Shares          
Class of Stock [Line Items]          
Preferred stock, authorized (shares) 500,000     500,000  
Preferred stock, par value (in dollars per share) | $ / shares $ 1.00        
Subsequent event | June 2017 Share Repurchase Program          
Class of Stock [Line Items]          
Common stock authorized to be repurchased (shares)     5,000,000,000