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Share-Based Compensation (Schedule of All Stock Option Transactions Under the Plans) (Details)
shares in Millions
9 Months Ended
Mar. 31, 2020
$ / shares
shares
Stock Options  
Outstanding at beginning of period (in shares) | shares 6
Granted (in shares) | shares 0
Exercised (in shares) | shares 0
Canceled and forfeited (in shares) | shares 0
Outstanding at end of period (in shares) | shares 6
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 $ 63.78
Granted (in usd per share) | $ / shares 0
Exercised (in usd per share) | $ / shares 0
Canceled and forfeited (in usd per share) | $ / shares 0
Outstanding at end of period (in usd per share) | $ / shares 64.02
Exercisable at end of period (in usd per share) | $ / shares $ 63.96