Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Apr. 28, 2017	Apr. 29, 2016
Statement of Financial Position [Abstract]
Allowances for accounts receivable	$ 155	$ 161
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, authorized (shares)	2,600,000,000	2,600,000,000
Common stock, issued (shares)	1,369,424,818	1,399,018,022
Common stock, outstanding (shares)	1,369,424,818	1,399,018,022