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Net Earnings Per Share (Tables)
12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
Summary of net earnings per share
Net earnings per share were computed as follows:
 Year ended December 31,
 202120202019
 (in millions, except per share amounts)
Net earnings attributable to common stockholders$917 $317 $493 
Basic earnings per common share:
Weighted-average common shares outstanding215.0 214.9 220.2 
Net earnings attributable to common stockholders$4.27 $1.48 $2.24 
Diluted earnings per common share:
Weighted-average common shares outstanding215.0 214.9 220.2 
Dilutive common shares—stock-based awards1.2 0.3 1.4 
Diluted weighted-average shares outstanding216.2 215.2 221.6 
Net earnings attributable to common stockholders$4.24 $1.47 $2.23