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Shareholders' Equity (Changes in the Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($)
$ in Millions
 3 Months Ended
Sep. 30, 2016
Sep. 30, 2015
AOCI, Net of Tax [Roll Forward]    
Balance at beginning of period $ 6,571  
Other comprehensive income/(loss), before reclassifications 1  
Amounts reclassified to earnings (1)  
Total other comprehensive income/(loss), net of tax 0 $ (45)
Balance at end of period 6,531  
Foreign Currency Translation Adjustments    
AOCI, Net of Tax [Roll Forward]    
Balance at beginning of period (123)  
Other comprehensive income/(loss), before reclassifications (1)  
Amounts reclassified to earnings 0  
Total other comprehensive income/(loss), net of tax (1)  
Balance at end of period (124)  
Unrealized Gain/(Loss) on Derivatives, net of tax    
AOCI, Net of Tax [Roll Forward]    
Balance at beginning of period 7  
Other comprehensive income/(loss), before reclassifications 2  
Amounts reclassified to earnings (1)  
Total other comprehensive income/(loss), net of tax 1  
Balance at end of period 8  
Accumulated Other Comprehensive Loss    
AOCI, Net of Tax [Roll Forward]    
Balance at beginning of period (116)  
Balance at end of period $ (116)