Share-Based Compensation (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	$ 8	$ 7
Restricted Shares And Share Units
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period, in years	3 years
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period, in years	3 years
Stock Options | Minimum
Share-based Compensation Arrangement by Share-based Payment Award
Exercisable period of plans, in years	7 years
Stock Options | Maximum
Share-based Compensation Arrangement by Share-based Payment Award
Exercisable period of plans, in years	10 years
Performance Shares | Minimum
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period, in years	2 years
Vested shares as a percentage of target award amount	0.00%
Performance Shares | Maximum
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period, in years	3 years
Vested shares as a percentage of target award amount	200.00%