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Statements of Cash Flows Additional Information - Supplemental Cash Flows and Non-Cash Investing Activities (Detail) - USD ($)
$ in Millions
6 Months Ended
Oct. 27, 2017
Oct. 28, 2016
Non-cash Investing Activities:    
Capital expenditures incurred but not paid $ 17 $ 35
Supplemental Cash Flow Information:    
Income taxes paid, net of refunds 28 70
Interest paid $ 24 $ 23