Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Apr. 24, 2020	Apr. 26, 2019
Statement of Financial Position [Abstract]
Allowances for accounts receivable	$ 208	$ 190
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, authorized (in shares)	2,600,000,000	2,600,000,000
Common stock, issued (in shares)	1,341,074,724	1,340,697,595
Common stock, outstanding (in shares)	1,341,074,724	1,340,697,595