v2.4.1.9
Earnings Per Share (Tables)
12 Months Ended
Dec. 31, 2014
Earnings Per Share [Abstract]  
Earnings Per Share [Table Text Block]

The following table provides a reconciliation between basic and diluted earnings per share for the years ended December 31:

Millions, Except Per Share Amounts201420132012
Net income $ 5,180$ 4,388$ 3,943
Weighted-average number of shares outstanding:       
Basic  897.1  926.5  946.2
Dilutive effect of stock options  2.1  2.4  3.6
Dilutive effect of retention shares and units  1.9  2.6  3.1
Diluted  901.1  931.5  952.9
Earnings per share – basic $ 5.77$ 4.74$ 4.17
Earnings per share – diluted $ 5.75$ 4.71$ 4.14