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Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 2024
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
 First Quarter
 2024202320242023
($ in millions, except per share amounts,
shares in millions)
Net income$53 $466 $53 $466 
Dividend equivalent payments(1)(1)(1)— 
Income available to common stockholders$52 $465 $52 $466 
Weighted-average shares outstanding225.8 227.7 225.8 227.7 
Dilutive effect of outstanding options and share-settled awards  0.4 0.6 
Adjusted weighted-average shares outstanding  226.2 228.3 
Earnings per share$0.23 $2.04 $0.23 $2.04