Share-Based Compensation and Savings Plans Share-Based Compensation and Savings Plans (Additional Data for Performance Share Units) (Details) (Performance Shares, USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2012
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$ 12
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	2 years