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Share-Based Compensation (Schedule of All Stock Option Transactions Under the Plans) (Details) - $ / shares
shares in Millions
 12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Stock Options    
Outstanding at beginning of period (in shares) 8 10
Granted (in shares) 1 1
Exercised (in shares) (2) (3)
Canceled and forfeited (in shares) 0 0
Outstanding at end of period (in shares) 7 8
Exercisable at end of period (in shares) 5  
Weighted-Average Exercise Price per Common Share    
Outstanding at beginning of period (in usd per share) $ 46.50 $ 39.16
Granted (in usd per share) 84.11 72.15
Exercised (in usd per share) 39.06 36.21
Canceled and forfeited (in usd per share) 0.00 0.00
Outstanding at end of period (in usd per share) 54.09 $ 46.50
Exercisable at end of period (in usd per share) $ 42.82