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Earnings Per Common Share ("EPS")
9 Months Ended
Sep. 30, 2021
Earnings Per Share [Abstract]  
Earnings Per Common Share (EPS) Earnings Per Common Share (“EPS”)
 Quarter endedYear to date
 2021202020212020
Net Income$528 $283 $1,245 $572 
Weighted-average common shares outstanding (for basic calculation)296 303 298 302 
Effect of dilutive share-based employee compensation
Weighted-average common and dilutive potential common shares outstanding (for diluted calculation)302 307 304 307 
Basic EPS$1.78 $0.94 $4.17 $1.89 
Diluted EPS$1.75 $0.92 $4.10 $1.86 
Unexercised employee stock options and stock appreciation rights (in millions) excluded from the diluted EPS computation(a)
0.1 4.7 1.5 4.6 

(a)These unexercised employee stock options and stock appreciation rights were not included in the computation of diluted EPS because to do so would have been antidilutive for the periods presented.