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Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2023
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share Calculation
The following table sets forth the calculation of basic and diluted earnings per share:

 BasicDiluted
 Second Quarter
 2023202220232022
($ in millions, except per share amounts,
shares in millions)
Net income$356 $819 $356 $819 
Dividend equivalent payments— (1)— (1)
Income available to common stockholders$356 $818 $356 $818 
Weighted-average shares outstanding227.5 236.7 227.5 236.7 
Dilutive effect of outstanding options and share-settled awards  0.5 0.8 
Adjusted weighted-average shares outstanding  228.0 237.5 
Earnings per share$1.56 $3.46 $1.56 $3.45 
 BasicDiluted
 First Six Months
 2023202220232022
($ in millions, except per share amounts,
shares in millions)
Net income$822 $1,522 $822 $1,522 
Dividend equivalent payments(1)(1)(1)(1)
Income available to common stockholders$821 $1,521 $821 $1,521 
Weighted-average shares outstanding227.6 238.0 227.6 238.0 
Dilutive effect of outstanding options and share-settled awards  0.5 0.9 
Adjusted weighted-average shares outstanding 228.1 238.9 
Earnings per share$3.61 $6.39 $3.60 $6.37