Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Jan. 24, 2020	Apr. 26, 2019
Statement of Financial Position [Abstract]
Allowances for accounts receivable	$ 205	$ 190
Ordinary shares, par value (usd per share)	$ 0.0001	$ 0.0001
Ordinary shares authorized (shares)	2,600,000,000	2,600,000,000
Ordinary shares issued (shares)	1,340,786,042	1,340,697,595
Ordinary shares outstanding (shares)	1,340,786,042	1,340,697,595

Amount of allowance for credit loss on accounts receivable, classified as current.

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Face amount or stated value per share of common stock.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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