Income (Loss) per Share

9 Months Ended

Sep. 30, 2017

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 shares represent potential common shares 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 September 30		Nine Months Ended September 30
Millions of shares	2017	2016	2017	2016
Basic weighted average common shares outstanding	872	862	869	860
Dilutive effect of awards granted under our stock incentive plans	1	2	3	—
Diluted weighted average common shares outstanding	873	864	872	860

Antidilutive shares:
Options with exercise price greater than the average market price	14	12	6	13
Options which are antidilutive due to net loss position	—	—	—	1
Total antidilutive shares	14	12	6	14