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Income (Loss) per Share (Tables)
 6 Months Ended
Jun. 30, 2022
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
June 30		Six Months Ended
June 30
Millions of shares2022202120222021
Basic weighted average common shares outstanding904 890 902 889 
Dilutive effect of awards granted under our stock incentive plans5 — 4 — 
Diluted weighted average common shares outstanding909 890 906 889 
Antidilutive shares:
Options with exercise price greater than the average market price14 22 15 22 
     Total antidilutive shares14 22 15 22