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Loss Per Share (Tables)
3 Months Ended
Mar. 31, 2021
Earnings Per Share [Abstract]  
Schedule of earnings per share, basic and diluted The following table shows how we computed basic and diluted earnings per common share for the three months ended March 31, 2021 and 2020 (dollars and share data in millions):
Three Months Ended March 31,
 20212020
Net loss$(247)$(268)
Weighted average basic shares316.3 277.2 
Effect of dilutive securities— — 
Weighted average diluted shares316.3 277.2 
Loss per common share
Basic$(0.78)$(0.97)
Diluted$(0.78)$(0.97)