Share-Based Compensation and Savings Plans (Additional Data Related to Restricted Share and Restricted Share Unit Activity) (Details) (Restricted Shares and Share Units, USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Restricted Shares and Share Units
Share-based Compensation Arrangement by Share-based Payment Award
Total compensation cost, net of estimated forfeitures, related to unvested awards not yet recognized, pre-tax	$ 75	$ 67	$ 67
Weighted-average period over which award cost is expected to be recognized (in years)	2 years	2 years	2 years
Total fair value of shares vested during the year	$ 55	$ 60	$ 54