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Financing Arrangements - Future Principal Debt Maturities (Detail) - Senior Notes - USD ($)
$ in Millions
Oct. 27, 2017
Apr. 28, 2017
Debt Instrument [Line Items]    
Remainder of 2018 $ 750  
2020 400  
2022 500  
Thereafter 650  
Total $ 2,300 $ 1,500