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Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Earnings Per Share [Abstract]    
Net income $ 46 $ 36
Weighted Average Shares    
Weighted average common shares outstanding (in shares) 56,655,865 56,897,799
Effect of dilutive securities    
Stock-based awards (in shares) 534,058 692,473
Weighted average diluted common shares (in shares) 57,189,923 57,590,272
Earnings per common share    
Basic earnings per common share (in dollars per share) $ 0.80 $ 0.64
Effect of dilutive securities    
Stock-based awards (in dollars per share) 0 (0.01)
Diluted earnings per common share (in dollars per share) $ 0.80 $ 0.63