XML 25 R52.htm IDEA: XBRL DOCUMENT v2.4.0.6
Share-Based Compensation Plans (Details) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award            
Share-based compensation expense $ 55 $ 59 $ 160 $ 179    
Employee share purchase plans
           
Share-based Compensation Arrangement by Share-based Payment Award            
Share-based compensation expense 2 2 6 5    
Restricted share units ("RSUs")
           
Share-based Compensation Arrangement by Share-based Payment Award            
Share-based compensation expense 37 31 120 108    
Non-vested share awards            
Non-vested at beginning of period (in shares)     9,916,000 10,674,000 10,674,000  
Granted (in shares)     4,888,000 3,366,000    
Vested (in shares)     (3,343,000) (3,385,000)    
Forfeited (in shares)     (516,000) (410,000)    
Non-vested at end of period (in shares) 10,945,000 10,245,000 10,945,000 10,245,000    
Weighted Average Fair value            
Non-vested at beginning of period (in dollars per share)     $ 42 $ 38 $ 38  
Granted (in dollars per share)     $ 46 $ 51    
Vested (in dollars per share)     $ 42 $ 39    
Forfeited (in dollars per share)     $ 44 $ 39    
Non-vested at end of period (in dollars per share) $ 44 $ 42 $ 44 $ 42    
Performance-based Awards
           
Share-based Compensation Arrangement by Share-based Payment Award            
Share-based compensation expense 15 24 30 59    
Non-vested share awards            
Granted (in shares)     1,369,000   1,715,000 1,390,000
Weighted Average Fair value            
Granted (in dollars per share)     $ 47   $ 50 $ 39
Number of shares that would be issued based on current performance levels     1,367,000   1,131,000 1,241,000
Unamortized expense, based on current 52   52   25 4
Share options
           
Share-based Compensation Arrangement by Share-based Payment Award            
Share-based compensation expense $ 1 $ 2 $ 4 $ 7    
Weighted Average Fair value            
Shares granted       80,000    
Shares granted (in dollars per share)       $ 53    
Share options | Incentive compensation plans
           
Weighted Average Fair value            
Shares granted       80,000    
Shares granted (in dollars per share)       $ 53