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Earnings Per Share (EPS) - Computation of Basic and Diluted EPS Attributable to Common Stock (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Earnings Per Share [Abstract]        
Net income $ 85 $ 91 $ 230 $ 192
Weighted average shares of common stock outstanding (in shares) 62 66 64 66
Basic earnings per share (in dollars per share) $ 1.36 $ 1.38 $ 3.62 $ 2.91
Net income $ 85 $ 91 $ 230 $ 192
Dilutive effect of stock options and restricted stock units (in shares) 1 1 0 1
Weighted average shares of common stock outstanding - diluted (in shares) 63 67 64 67
Diluted earnings per share (in dollars per share) $ 1.35 $ 1.37 $ 3.58 $ 2.87
Common stock equivalents excluded from income per diluted share because of their anti-dilutive effect (in shares) 1 1 1 1