Quarterly report pursuant to Section 13 or 15(d)

Computation of Basic and Diluted Earnings Per Share (Detail)

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Computation of Basic and Diluted Earnings Per Share (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Numerator:        
Net income attributable to common shareowners $ 454 $ 1,071 $ 1,365 $ 2,108
Denominator:        
Weighted average shares 916 941 918 945
Deferred compensation obligations 1 1 1 1
Vested portion of restricted shares 1 1 1 2
Denominator for basic earnings per share 918 943 920 948
Denominator for diluted earnings per share 927 952 929 956
Basic earnings per share $ 0.49 $ 1.14 $ 1.48 $ 2.22
Diluted earnings per share $ 0.49 $ 1.13 $ 1.47 $ 2.21
Restricted performance units
       
Denominator:        
Incremental common shares attributable to share-based payment arrangements 8 8 8 7
Stock option plans
       
Denominator:        
Incremental common shares attributable to share-based payment arrangements 1 1 1 1