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Share-Based Compensation Plans (Assumptions Utilized in the Valuation in Calculating the Compensation Expense for Stock Options Granted) (Details)
12 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2009
Share-Based Compensation Plans      
Expected life, years   5 5
Expected life, years, minimum 4.9    
Expected life, years, maximum 5.9    
Expected volatility     23.40%
Expected volatility, minimum 20.60% 21.60%  
Expected volatility, maximum 21.00% 22.90%  
Weighted-average volatility 20.60% 22.00% 23.40%
Risk-free interest rate 1.50%   2.60%
Risk-free interest rate, minimum   2.20%  
Risk-free interest rate, maximum   2.40%  
Dividend yield     3.00%
Dividend yield, minimum 3.40% 3.40%  
Dividend yield, maximum 3.60% 3.60%  
Weighted-average dividend yield 3.40% 3.60% 3.00%