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Share-Based Compensation (Schedule of Total Share-Based Compensation Expense by Type of Award) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Share-based compensation expense $ 25 $ 24
Restricted Share Units
   
Share-based compensation expense 16 16
Stock Options
   
Share-based compensation expense 5 5
Performance Share Units
   
Share-based compensation expense $ 4 $ 3