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Income (Loss) per Share (Tables)
 6 Months Ended
Jun. 30, 2024
Earnings Per Share [Abstract]  
Weighted average shares outstanding and antidilutive shares
A reconciliation of the number of shares used for the basic and diluted income per share computations is as follows:
Three Months Ended
June 30,		Six Months Ended
June 30,
Millions of shares2024202320242023
Basic weighted average common shares outstanding884 901 886 902 
Dilutive effect of awards granted under our stock incentive plans2 2 2 3 
Diluted weighted average common shares outstanding886 903 888 905 
Antidilutive shares:
Options with exercise price greater than the average market price10 13 10 14 
Total antidilutive shares10 13 10 14