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Earnings per Share - Components of Basic and Diluted Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Sep. 30, 2023
Sep. 30, 2022
Earnings Per Share [Abstract]                
Net income attributable to common stockholders $ 12 $ 17 $ 40 $ 8 $ (4) $ 36 $ 69 $ 40
Weighted average outstanding shares of common stock (in shares) 99.2     102.7     100.5 103.7
Dilutive effect of employee stock options, restricted stock and other stock awards (in shares) 2.8     2.0     2.3 2.7
Common stock and common stock equivalents (in shares) 102.0     104.7     102.8 106.4
Net income per share:                
Basic (in dollars per share) $ 0.12     $ 0.08     $ 0.69 $ 0.39
Diluted (in dollars per share) $ 0.12     $ 0.08     $ 0.67 $ 0.38