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Share-Based Compensation (Schedule of All Stock Option Transactions Under the Plans) (Details)
shares in Millions
 6 Months Ended
Dec. 31, 2016
$ / shares
shares
Stock Options  
Outstanding at beginning of period (in shares) | shares 7
Granted (in shares) | shares 1
Exercised (in shares) | shares (1)
Canceled and forfeited (in shares) | shares 0
Outstanding at end of period (in shares) | shares 7
Exercisable at end of period (in shares) | shares 5
Weighted-Average Exercise Price per Common Share  
Outstanding at beginning of period (in usd per share) | $ / shares $ 54.09
Granted (in usd per share) | $ / shares 83.11
Exercised (in usd per share) | $ / shares 36.90
Canceled and forfeited (in usd per share) | $ / shares 0.00
Outstanding at end of period (in usd per share) | $ / shares 61.30
Exercisable at end of period (in usd per share) | $ / shares $ 50.75