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General (Details) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Nov. 30, 2012
Nov. 30, 2011
Nov. 30, 2012
Nov. 30, 2011
Aug. 31, 2012
Brazil [Member]
Aug. 31, 2012
France [Member]
Aug. 31, 2012
Poland [Member]
General Details [Abstract]              
Dividends Payable, Date Declared Nov. 02, 2012            
Dividends Payable Amount Per Share $ 0.14   $ 0.14        
Dividends Payable, Date To Be Paid Dec. 17, 2012            
Dividends Payable, Date Of Record Nov. 21, 2012            
Business Acquisition [Line Items]              
Current Assets $ 143   $ 143        
Property and Equipment 88   88        
Goodwill 348   348        
Intangible assets 60   60        
Other non-current assets 68   68        
Current liabilities (166)   (166)        
Long-term liabilities (34)   (34)        
Total purchase price 507   507   398 55 54
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life     9 years        
Acquired Finite Lived Intangible Assets Amortization Period, Majority of Expense Recognized     5 years        
Stock Based Compensation Details [Abstract]              
Stock-based compensation 25 23 64 60      
Treasury Shares [Abstract]              
Number Of Shares Repurchased 2,700,000   2,700,000        
Treasury Stock Acquired, Average Cost Per Share     $ 91        
Payments for Repurchase of Common Stock     $ 246 $ 197      
Stock Repurchase Authorization, Remaining Number of Shares 188,000   188,000