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Income Taxes , Components of Income Before Income Taxes, Based on Jurisdiction (Details) - USD ($)
$ in Millions
12 Months Ended
Apr. 26, 2019
Apr. 27, 2018
Apr. 28, 2017
Income Tax Disclosure [Abstract]      
U.S. $ 877 $ (958) $ (234)
International 4,320 6,633 4,836
Income (loss) before income taxes $ 5,197 $ 5,675 $ 4,602