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Balance Sheet Details - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Apr. 19, 2016
Jan. 27, 2017
Apr. 28, 2017
Apr. 29, 2016
Apr. 24, 2015
Property Plant And Equipment [Line Items]          
Net book value     $ 799 $ 937  
Cash proceeds from properties sold $ 250        
Proceeds from sale of properties     0 102 $ 0
Gain recognized on sale of asset       51  
Non-cash sale of properties, net book value   $ 9 9    
Non-cash extinguishment of financing obligations   19 19 0 0
Gain on sale of properties   $ 10 10 51 $ 0
Properties Subject to Real Estate Transactions          
Property Plant And Equipment [Line Items]          
Net book value       118  
Properties Sold          
Property Plant And Equipment [Line Items]          
Net book value       $ 51  
Other Current Assets          
Property Plant And Equipment [Line Items]          
Land and buildings held for sale book value     $ 118