Income (Loss) per Share (Tables)

9 Months Ended

Sep. 30, 2020

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 shares	2020	2019	2020	2019
Basic weighted average common shares outstanding	882	876	879	874
Dilutive effect of awards granted under our stock incentive plans	—	—	—	1
Diluted weighted average common shares outstanding	882	876	879	875
Antidilutive shares:
Options with exercise price greater than the average market price	26	26	27	23
Shares which are antidilutive due to net loss position	1	—	1	—
Total antidilutive shares	27	26	28	23