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Employees' Stock Incentive Plans and Management Incentive Plans 7 (Details) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended 26 Months Ended 36 Months Ended
Apr. 27, 2011
Feb. 15, 2011
Apr. 28, 2010
Feb. 15, 2010
Apr. 29, 2009
Apr. 27, 2011
Feb. 15, 2009
Employees Stock Incentive Plans And Management Incentive Plans (Textuals) [Abstract]              
Time at which substantially all employees can purchase shares of the Company's common stock at a discounted price through payroll deductions End of two six-month offering periods            
Purchase price of the option as a percentage of fair market value of the Company's common stock           95.00% 85.00%
Forfeitures of restricted stock recorded as treasury share repurchases, number of shares 1,400,000            
Orignal number of shares available for issuance under the GSPP 5,000,000         5,000,000  
Number of shares purchased under global stock purchase plan   185,716   280,006      
Compensation under the management incentive plans $ 45   $ 49   $ 38    
Performance period in years for dividends paid P2Y            
Number of Trading Days for LTTP Peer Group Company Stock Price P60D            
Compensation cost related to long-term performance program recognized in G & A 21.5   20.7   17.4    
Tax benefit from compensation cost related to long-term performance program $ 7.4   $ 7.0   $ 5.9