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Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2022
Earnings Per Share [Abstract]  
Computation of Basic and Diluted Earnings Per Share of Common Stock The following table sets forth the computation of basic and diluted earnings per share of common stock:
 Three Months Ended March 31,
 20222021
(Dollars in millions, except share data)
Net income applicable to common shareholders$53 $149 
Weighted Average Shares
Weighted average common shares outstanding 53,219,86652,675,562
Effect of dilutive securities
Stock-based awards358,135 622,241 
Weighted average diluted common shares$53,578,001 $53,297,803 
Earnings per common share
Basic earnings per common share$0.99 $2.83 
Effect of dilutive securities
Stock-based awards— (0.03)
Diluted earnings per common share$0.99 $2.80