Share-Based Compensation and Savings Plans (Schedule of All Stock Option Transactions Under the Plans) (Details) - $ / shares shares in Millions	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Stock Options Outstanding at Beginning of Period	10	15
Stock Options Outstanding, Granted	1	2
Stock Options Outstanding, Exercised	(3)	(7)
Stock Options Outstanding, Canceled and forfeited	0	0
Stock Options Outstanding at End of Period	8	10
Stock Options Outstanding, Exercisable at End of Period	4
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted-Average Exercise Price [Roll Forward]
Weighted-Average Exercise Price Per Common Share, Outstanding at Beginning of Period	$ 39.16	$ 36.97
Weighted-Average Exercise Price Per Common Share, Granted	72.15	51.77
Weighted-Average Exercise Price Per Common Share, Exercised	36.21	38.29
Weighted-Average Exercise Price Per Common Share, Canceled and forfeited	0.00	0.00
Weighted-Average Exercise Price Per Common Share, Outstanding at End of Period	46.50	$ 39.16
Weighted-Average Exercise Price Per Common Share, Exercisable at End of Period	$ 37.19