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