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Computations of Profit Per Share
 9 Months Ended
Sep. 30, 2012
Earnings Per Share [Abstract]  
Computations of Profit Per Share
Computations of Profit Per Share
 
(Dollars in millions except per share data)
Three Months Ended September 30,
 
Nine Months Ended
September 30,
 
2012
 
2011
 
2012
 
2011
I.
 
Profit for the period (A) 1:
$
1,699

 
$
1,141

 
$
4,984

 
$
3,381

II.
 
Determination of shares (in millions):
—

 
 

 
 
 
 
 
 
Weighted-average number of common shares outstanding (B)
653.6

 
646.6

 
652.0

 
644.3

 
 
Shares issuable on exercise of stock awards, net of shares assumed to be purchased out of proceeds at average market price
15.1

 
19.4

 
17.7

 
21.8

 
 
Average common shares outstanding for fully diluted computation (C) 2
668.7

 
666.0

 
669.7

 
666.1

III.
 
Profit per share of common stock:
 

 
 

 
 
 
 
 
 
Assuming no dilution (A/B)
$
2.60

 
$
1.76

 
$
7.64

 
$
5.25

 
 
Assuming full dilution (A/C) 2
$
2.54

 
$
1.71

 
$
7.44

 
$
5.08

1 Profit attributable to common stockholders.
2 Diluted by assumed exercise of stock-based compensation awards using the treasury stock method.

 
SARs and stock options to purchase 6,073,271 common shares were outstanding for both the three and nine months ended September 30, 2012, respectively, but were not included in the computation of diluted earnings per share because the effect would have been anti-dilutive. For both the three and nine months ended September 30, 2011,  there were outstanding SARs and stock options to purchase 2,904,815 common shares, but were not included in the computation of diluted earnings per share because the effect would have been anti-dilutive.