Income (Loss) per Share

3 Months Ended

Mar. 31, 2021

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 would be 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 shares		2021	2020
Basic weighted average common shares outstanding		889	878
Dilutive effect of awards granted under our stock incentive plans		—	—
Diluted weighted average common shares outstanding		889	878

Antidilutive shares:
Options with exercise price greater than the average market price		26	27
Options which are antidilutive due to net loss position		—	3
Total antidilutive shares		26	30