Share-Based Compensation and Savings Plans (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	$ 33	$ 32	$ 31
Total expense recognized from employee retirement savings plans	$ 75	$ 68	$ 53
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
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
Performance Share Units
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	143.00%
Performance Share Units | Minimum
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	0.00%
Performance Share Units | 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
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	200.00%
2011 LTIP
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	26
2011 LTIP | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	26
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award	one share for every share issued
2011 LTIP | Awards Other than Stock Options
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	10
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award	two and one-half shares for every share issued