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Earnings Per Share (Tables)
6 Months Ended
Jun. 30, 2020
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following table sets forth the calculation of basic and diluted earnings per share:

 BasicDiluted
 Second Quarter
 2020201920202019
($ in millions, except per share amounts,
shares in millions)
Net income$392  $722  $392  $722  
Dividend equivalent payments—  (2) —  —  
Income available to common stockholders$392  $720  $392  $722  
Weighted-average shares outstanding255.4  264.8  255.4  264.8  
Dilutive effect of outstanding options    
and share-settled awards  1.3  2.3  
Adjusted weighted-average shares outstanding  256.7  267.1  
Earnings per share$1.53  $2.72  $1.53  $2.70  
 BasicDiluted
 First Six Months
 2020201920202019
($ in millions, except per share amounts,
shares in millions)
Net income$773  $1,399  $773  $1,399  
Dividend equivalent payments(1) (3) (1) —  
Income available to common stockholders$772  $1,396  $772  $1,399  
Weighted-average shares outstanding256.3  265.9  256.3  265.9  
Dilutive effect of outstanding options    
and share-settled awards  1.4  2.4  
Adjusted weighted-average shares outstanding 257.7  268.3  
Earnings per share$3.01  $5.25  $3.00  $5.21