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Share-Based Compensation and Savings Plans (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Tax benefit related to share-based compensation $ 38 $ 33 $ 32
Expense recognized for employee retirement savings plans $ 91 $ 75 $ 68
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period (in years) 3 years    
Stock Options | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Exercisable period of plans (in years) 7 years    
Stock Options | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Exercisable period of plans (in years) 10 years    
Restricted Share Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period (in years) 3 years    
Performance Share Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period (in years) 3 years    
Target performance goal (as a percent) 120.00% 143.00%  
Performance Share Units | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Target performance goal (as a percent) 0.00%    
Performance Share Units | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Target performance goal (as a percent) 200.00%    
2011 LTIP      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for future issuances 22,000,000    
2011 LTIP | Awards Other than Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for future issuances 9,000,000    
Number of shares against the Plan per award Issued 2.5    
2011 LTIP | Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for future issuances 22,000,000    
Number of shares against the Plan per award Issued 1