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Income Taxes - Income Before Income Taxes (Detail) - USD ($)
$ in Millions
12 Months Ended
Apr. 26, 2019
Apr. 27, 2018
Apr. 28, 2017
Income Tax Disclosure [Abstract]      
Domestic $ 678 $ 589 $ 166
Foreign 590 610 455
Income before income taxes $ 1,268 $ 1,199 $ 621