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Net Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Earnings Per Share [Abstract]        
Net (loss) earnings attributable to common stockholders $ (185) $ (28) $ 212 $ 230
Basic (loss) earnings per common share:        
Weighted-average common shares outstanding 214.9 213.9 215.3 215.0
Net earnings attributable to common stockholders (in dollars per share) $ (0.86) $ (0.13) $ 0.99 $ 1.07
Diluted (loss) earnings per common share:        
Weighted-average common shares outstanding 214.9 213.9 215.3 215.0
Dilutive common shares—stock options (in shares) 0.0 0.0 1.1 0.3
Diluted weighted-average shares outstanding 214.9 213.9 216.4 215.3
Net earnings attributable to common stockholders diluted (in dollars per share) $ (0.86) $ (0.13) $ 0.98 $ 1.07
Antidilutive securities excluded from computation of EPS (in shares) 3.5 3.1 1.2 3.3