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Income (Loss) per Share (Tables)
 9 Months Ended
Sep. 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
September 30,		Nine Months Ended
September 30,
Millions of shares2024202320242023
Basic weighted average common shares outstanding881 898 885 901 
Dilutive effect of awards granted under our stock incentive plans— 4 1 3 
Diluted weighted average common shares outstanding881 902 886 904 
Antidilutive shares:
Options with exercise price greater than the average market price9 11 10 13 
Total antidilutive shares9 11 10 13