Income (Loss) per Share
3 Months Ended
Mar. 31, 2024
Earnings Per Share [Abstract]  
Income (Loss) per Share Income per Share
Basic income or loss per share is based on the weighted average number of common shares outstanding during the period. Diluted income per share includes additional common shares that would have been outstanding if potential common shares with a dilutive effect had been issued. Antidilutive securities represent potentially dilutive securities which are excluded from the computation of diluted income or loss per share as their impact was antidilutive.

A reconciliation of the number of shares used for the basic and diluted income per share computations is as follows:
Three Months Ended
March 31
Millions of shares20242023
Basic weighted average common shares outstanding889 904 
Dilutive effect of awards granted under our stock incentive plans
Diluted weighted average common shares outstanding891 907 
Antidilutive shares:
Options with exercise price greater than the average market price11 14 
Total antidilutive shares11 14