Quarterly report pursuant to Section 13 or 15(d)

Computation of Basic and Diluted Earnings Per Share (Detail)

v2.4.0.6
Computation of Basic and Diluted Earnings Per Share (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Numerator:        
Net income attributable to common shareowners $ 469 $ 1,072 $ 2,555 $ 3,079
Denominator:        
Weighted average shares 958 974 959 982
Deferred compensation obligations 1 1 1 2
Vested portion of restricted shares 2 2 2 2
Denominator for basic earnings per share 961 977 962 986
Incremental common shares attributable to share-based payment arrangements     5 6
Denominator for diluted earnings per share 970 987 971 996
Basic earnings per share $ 0.49 $ 1.10 $ 2.66 $ 3.12
Diluted earnings per share $ 0.48 $ 1.09 $ 2.63 $ 3.09
Restricted performance units
       
Denominator:        
Incremental common shares attributable to share-based payment arrangements 3 2 3 3
Restricted stock units
       
Denominator:        
Incremental common shares attributable to share-based payment arrangements 5 7    
Stock option plans
       
Denominator:        
Incremental common shares attributable to share-based payment arrangements 1 1 1 1