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Earnings Per Share (Tables)
12 Months Ended
Dec. 31, 2024
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following table provides a reconciliation between basic and diluted earnings per share for the years ended December 31:
Millions, Except Per Share Amounts202420232022
Net income$6,747 $6,379 $6,998 
Weighted-average number of shares outstanding:
Basic607.6 609.2 622.7 
Dilutive effect of stock options0.4 0.4 0.6 
Dilutive effect of retention shares and units0.6 0.6 0.7 
Diluted608.6 610.2 624.0 
Earnings per share - basic$11.10 $10.47 $11.24 
Earnings per share - diluted$11.09 $10.45 $11.21