Share-Based Compensation and Savings Plans (Additional Data for All Restricted Share and Restricted Share Unit Activity) (Details) (Restricted Shares And Share Units, USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Restricted Shares And Share Units
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$ 67	$ 56	$ 58
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	2 years	2 years	2 years