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Share-Based Compensation (Schedule of All Transactions Related to Restricted Share Units Under the Plans) (Details)
$ / shares in Units, shares in Millions, $ in Millions
6 Months Ended
Dec. 31, 2019
USD ($)
$ / shares
shares
Restricted Share Units  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition 2 years
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $ $ 110
Restricted Share Units  
Nonvested at beginning of period (in shares) | shares 2
Granted (in shares) | shares 2
Vested (in shares) | shares (1)
Canceled and forfeited (in shares) | shares 0
Nonvested at end of period (in shares) | shares 3
Weighted-Average Grant Date Fair Value per Share  
Nonvested at beginning of period (in usd per share) | $ / shares $ 51.65
Granted (in usd per share) | $ / shares 42.40
Vested (in usd per share) | $ / shares 60.37
Canceled and forfeited (in usd per share) | $ / shares 0
Nonvested at end of period (in usd per share) | $ / shares $ 46.49
Employee Stock Option  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition 1 year
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $ $ 2