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Note 8 - Earnings Per Share (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

Millions, Except Per Share Amounts

 

2021

  

2020

  

2019

 

Net income

 $6,523  $5,349  $5,919 

Weighted-average number of shares outstanding:

            

Basic

  653.8   677.3   703.5 

Dilutive effect of stock options

  0.8   0.8   1.2 

Dilutive effect of retention shares and units

  0.8   1.0   1.4 

Diluted

  655.4   679.1   706.1 

Earnings per share – basic

 $9.98  $7.90  $8.41 

Earnings per share – diluted

 $9.95  $7.88  $8.38