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Shareholders' Equity (Narrative) (Details) (USD $)
12 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common stock, shares authorized 1,000,000,000    
Common stock, no par value (in dollars per share) $ 0    
Preferred stock, no par value (in dollars per share) $ 0    
Preferred stock, shares authorized 500,000    
Treasury stock, shares 57,500,000 40,300,000  
Treasury stock recorded at cost as a reduction of common stock (in dollars) $ 1,600,000,000 $ 1,100,000,000  
Total compensation expense for option grants, Restricted Stock Awards and PSU's 48,000,000 47,000,000 45,000,000
Stock Options [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expiration, number of years after grant date 10 years    
The weighted-average remaining contractual term of options outstanding 6 years    
The weighted-average remaining contractual term of options exercisable 5 years    
The aggregate intrinsic value of options outstanding (in dollars) 39,000,000    
The aggregate intrinsic value of options exercisable (in dollars) 6,000,000    
The weighted-average grant-date fair values of options granted (in dollars per share) $ 6.98 $ 8.82 $ 8.50
The total intrinsic values of options exercised (in dollars) 5,000,000 21,000,000 11,000,000
Cash proceeds received from options exercised (in dollars) 7,000,000 21,000,000 11,000,000
Total unrecognized compensation expense 16,000,000    
Period during which unrecognized compensation expense is expected to be recognized 4 years    
Amounts to be recognized as compensation expense during the next fiscal year 7,000,000    
Amounts to be recognized as compensation expense during the year following the next fiscal year 4,000,000    
Amounts to be recognized as compensation expense during the second year following the next fiscal year 3,000,000    
Amounts to be recognized as compensation expense during the third year following the next fiscal year 2,000,000    
Restricted Stock Awards And PSUs [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common shares or units granted as Restricted Stock Awards and PSUs (in shares) 1,249,000 1,100,000 1,000,000
Total unrecognized compensation expense 25,000,000    
Period during which unrecognized compensation expense is expected to be recognized 3 years    
Amounts to be recognized as compensation expense during the next fiscal year 15,000,000    
Amounts to be recognized as compensation expense during the year following the next fiscal year 9,000,000    
Amounts to be recognized as compensation expense during the second year following the next fiscal year 1,000,000    
Weighted average grant-date fair value of Restricted Stock Awards and PSU's, Granted (in dollars per share) $ 26.75 $ 32.19 $ 26.55
Restricted Stock Awards [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
Total fair value of Restricted Stock Awards vested during the period $ 30,000,000    
Performance Stock Units [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
2009 Incentive Compensation Plan [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for future grants (in shares) 24,500,000    
Minimum [Member] | Stock Options [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 5 years    
Maximum [Member] | Stock Options [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 9 years