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Earnings Per Common Share ("EPS")
9 Months Ended
Sep. 30, 2020
Earnings Per Share [Abstract]  
Earnings Per Common Share (EPS) Earnings Per Common Share (“EPS”)
 Quarter endedYear to date
 2020201920202019
Net Income$283 $255 $572 $806 
Weighted-average common shares outstanding (for basic calculation)303 306 302 307 
Effect of dilutive share-based employee compensation
Weighted-average common and dilutive potential common shares outstanding (for diluted calculation)307 313 307 314 
Basic EPS$0.94 $0.83 $1.89 $2.63 
Diluted EPS$0.92 $0.81 $1.86 $2.57 
Unexercised employee stock options and stock appreciation rights (in millions) excluded from the diluted EPS computation(a)
4.7 0.1 4.6 1.9 

(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.