Stock Plans (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 12 Months Ended
May 29, 2011
May 30, 2010
May 31, 2009
Stock Plans [Line Items]      
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant 16,942,290    
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Method Used We estimate the fair value of each option on the grant date using a Black-Scholes option-pricing model, which requires us to make predictive assumptions regarding future stock price volatility, employee exercise behavior, and dividend yield. We estimate our future stock price volatility using the historical volatility over the expected term of the option, excluding time periods of volatility we believe a marketplace participant would exclude in estimating our stock price volatility. We also have considered, but did not use, implied volatility in our estimate, because trading activity in options on our stock, especially those with tenors of greater than 6 months, is insufficient to provide a reliable measure of expected volatility. Our expected term represents the period of time that options granted are expected to be outstanding based on historical data to estimate option exercises and employee terminations within the valuation model. Separate groups of employees have similar historical exercise behavior and therefore were aggregated into a single pool for valuation purposes. The weighted-average expected term for all employee groups is presented in the table above. The risk-free interest rate for periods during the expected term of the options is based on the U.S. Treasury zero-coupon yield curve in effect at the time of grant.    
Share Based Compensation Arrangement By Share Based Payment Award Percent Of Market Price 100.00%    
Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period four years    
Share Based Compensation Arrangement By Share Based Payment Award Award Expiration Dating 10 years and one month    
Share Based Compensation Arrangement By Share Based Payment Award Compensation Expense Stock Options $ 26.8 $ 34.4 $ 40.0
Share Based Compensation Arrangement By Share Based Payment Award Terms Of Award Stock and units settled in stock subject to a restricted period and a purchase price, if any (as determined by the Compensation Committee of the Board of Directors), may be granted to key employees under the 2009 Plan. Certain restricted stock and restricted stock unit awards require the employee to deposit personally owned shares (on a one-for-one basis) during the restricted period. Restricted stock and restricted stock units generally vest and become unrestricted four years after the date of grant. Participants are entitled to dividends on such awarded shares and units, but only receive those amounts if the shares or units vest. The sale or transfer of these shares and units is restricted during the vesting period. Participants holding restricted stock, but not restricted stock units, are entitled to vote on matters submitted to holders of common stock for a vote.    
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value 93.6 26.1  
Employee Service Share Based Compensation Unrecognized Compensation Costs On Nonvested Awards 170.7    
Employee Service Share Based Compensation Unrecognized Compensation Costs On Nonvested Awards Weighted Average Period Of Recognition 19.1    
Share Based Compensation Arrangement By Share Based Payment Award Compensation Expense Stock Equity Instruments Other Than Options 141.2 131.0 101.4
Schedule Of Stock Options and Assumptions [Abstract]      
Estimated fair values of stock options granted $ 4.12 $ 3.20 $ 4.70
Risk-free interest rate 2.90% 3.70% 4.40%
Expected term 8.50 8.50 8.50
Expected volatility 18.50% 18.90% 16.10%
Dividend yield 3.00% 3.40% 2.70%
Schedule Of Stock Option Activity [Abstract]      
Balance as of May 25, 2008 81,104,600 94,607,000 106,042,400
Granted 5,234,300 6,779,400 6,495,400
Exercised (18,665,400) (20,013,600) (17,548,400)
Forfeited or expired (126,200) (268,200) (382,400)
Balance as of May 31, 2009 67,547,300 81,104,600 94,607,000
Balance as of May 30, 2010 67,547,300 81,104,600 94,607,000
Balance as of May 29, 2011 67,547,300 81,104,600 94,607,000
Balance as of May 25, 2008 47,726,600 67,619,200 76,389,200
Balance as of May 31, 2009 39,221,700 47,726,600 67,619,200
Balance as of May 30, 2010 39,221,700 47,726,600 67,619,200
Balance as of May 29, 2011 39,221,700 47,726,600 67,619,200
Balance as of May 25, 2008 $ 25.17 $ 23.84 $ 22.68
Granted $ 37.38 $ 27.99 $ 31.74
Exercised $ 22.59 $ 19.87 $ 19.60
Forfeited or expired $ 31.26 $ 24.82 $ 27.50
Balance as of May 31, 2009 $ 26.82 $ 25.17 $ 23.84
Balance as of May 30, 2010 $ 26.82 $ 25.17 $ 23.84
Balance as of May 29, 2011 $ 26.82 $ 25.17 $ 23.84
Balance as of May 25, 2008 $ 22.89 $ 21.96 $ 21.23
Balance as of May 31, 2009 $ 23.78 $ 22.89 $ 21.96
Balance as of May 30, 2010 $ 23.78 $ 22.89 $ 21.96
Balance as of May 29, 2011 $ 23.78 $ 22.89 $ 21.96
Schedule Of Net Cash Proceeds And Intrinsic Value [Abstract]      
Net Cash Proceeds From Stock Options Exercised 410.4 388.5 305.9
Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value $ 275.6 $ 271.8 $ 226.7
Schedule Of Restricted Stock Unit And Cash Settled Share Base Units [Abstract]      
Granted 3,751,600 4,745,700 4,348,000
Granted $ 36.16 $ 28.03 $ 31.70
Equity Classified Member
      
Schedule Of Restricted Stock Unit And Cash Settled Share Base Units [Abstract]      
Non-vested as of May 30, 2010 10,209,800    
Granted 2,406,700    
Vested (3,161,000)    
Forfeited or expired (285,600)    
Non-vested as of May 29, 2011 9,169,900    
Non-vested as of May 30, 2010 $ 28.49    
Granted $ 35.47    
Vested $ 26.46    
Forfeited or expired $ 31.61    
Non-vested as of May 29, 2011 $ 30.92    
Number of units granted (thousands) 9,169,900    
Weighted average price per unit $ 30.92    
Liability Classified Share Settled Member
      
Schedule Of Restricted Stock Unit And Cash Settled Share Base Units [Abstract]      
Non-vested as of May 30, 2010 424,300    
Granted 127,700    
Vested (78,100)    
Forfeited or expired (36,700)    
Non-vested as of May 29, 2011 437,200    
Non-vested as of May 30, 2010 $ 28.64    
Granted $ 37.40    
Vested $ 29.02    
Forfeited or expired $ 30.04    
Non-vested as of May 29, 2011 $ 31.01    
Number of units granted (thousands) 437,200    
Weighted average price per unit $ 31.01    
Liability Classified Cash Settled Member
      
Schedule Of Restricted Stock Unit And Cash Settled Share Base Units [Abstract]      
Non-vested as of May 30, 2010 3,703,700    
Granted 1,217,200    
Vested (245,200)    
Forfeited or expired (160,600)    
Non-vested as of May 29, 2011 4,515,100    
Non-vested as of May 30, 2010 $ 29.65    
Granted $ 37.40    
Vested $ 31.33    
Forfeited or expired $ 31.36    
Non-vested as of May 29, 2011 $ 31.58    
Number of units granted (thousands) 4,515,100    
Weighted average price per unit $ 31.58   Â