Share-Based Compensation and Savings Plans (Schedule of Additional Data Related to Restricted Share and Restricted Share Units Activity) (Details) (Restricted Shares and Share Units, USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Restricted Shares and Share Units
Share-based Compensation Arrangement by Share-based Payment Award
Total compensation cost, net of estimated forfeitures, related to Award Type not yet recognized, pre-tax	$ 67	$ 67	$ 56
Weighted-average period over which compensation cost is expected to be recognized, Award Type	2 years	2 years	2 years
Total fair value of shares vested during the year	$ 60	$ 54	$ 54