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Stock Plans (Tables)
6 Months Ended
Nov. 25, 2012
Stock Plans [Abstract]  
Schedule of compensation expense related to stock-based payments [Table Text Block]
  Quarter Ended  Six-Month Period Ended
In Millions Nov. 25, 2012 Nov. 27, 2011  Nov. 25, 2012 Nov. 27, 2011
Compensation expense related to stock-based payments$ 30.4$ 37.4 $ 73.6$ 83.9
Schedule of net cash proceeds from the exercise of stock options less shares used for withholding taxes and the intrisic value of options exercised [Table Text Block]
  Six-Month Period Ended
In Millions Nov. 25, 2012  Nov. 27, 2011
Net cash proceeds$ 152.7 $ 99.2
Intrinsic value of options exercised$ 155.2 $ 62.7
Schedule of estimated fair value of stock options granted and the assumptions used for the Black-Scholes option-pricing model [Table Text Block]
      
  Six-Month Period Ended
  Nov. 25, 2012  Nov. 27, 2011
Estimated fair values of stock options granted  $ 3.65  $ 5.88
Assumptions:     
Risk-free interest rate  1.6%   2.9%
Expected term  9.0years   8.5years
Expected volatility  17.3%   17.6%
Dividend yield  3.5%   3.3%
Schedule of information on stock option activity [Table Text Block]
 Options Outstanding (Thousands) Weighted-Average Exercise Price Per ShareWeighted- Average Remaining Contractual Term (Years) Aggregate Intrinsic Value (Millions)
Balance as of May 27, 2012 60,942.7$27.96   
Granted 3,407.7 38.15   
Exercised (9,356.5) 23.13   
Forfeited or expired (54.8) 34.89   
Outstanding as of Nov. 25, 2012 54,939.1$29.41 5.04$624.3
Exercisable as of Nov. 25, 2012 36,465.5$26.69 3.60$504.0
Schedule of information on restricted stock unit activity [Table Text Block]
  Equity Classified Liability Classified
  Share-Settled Units (Thousands) Weighted-Average Grant-Date Fair Value Share-Settled Units (Thousands) Weighted-Average Grant-Date Fair Value Cash-Settled Share-Based Units (Thousands) Weighted-Average Grant-Date Fair Value
Non-vested as of May 27, 2012 8,551.8$33.79 397.1$32.68 3,991.5$31.58
Granted 2,275.7 38.27 74.2 38.15  - 0.00
Vested (2,168.5) 32.48 (69.5) 31.68 (1,545.6) 31.67
Forfeited (215.7) 31.28 (4.8) 34.86 (43.6) 29.41
Non-vested as of Nov. 25, 2012 8,443.3$35.48 397.0$35.58 2,402.3$30.98