Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Apr. 29, 2016	Apr. 24, 2015
Statement of Financial Position [Abstract]
Allowances for accounts receivable	$ 161	$ 144
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)	1,399,018,022	1,421,648,005
Common stock, outstanding (shares)	1,399,018,022	1,421,648,005