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Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Jan. 25, 2013	Apr. 27, 2012
Statement of Financial Position [Abstract]
Allowances for accounts receivable	$ 106	$ 100
Preferred stock, par value	$ 1.00	$ 1.00
Common stock, par value	$ 0.10	$ 0.10

- Definition

Face amount or stated value per share of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer); generally not indicative of the fair market value per share.

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