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Net Earnings Per Share (Tables)
9 Months Ended
Sep. 30, 2023
Earnings Per Share [Abstract]  
Summary of net earnings per share
Net earnings per share were computed as follows:
 Three months ended 
 September 30,
Nine months ended 
 September 30,
 2023202220232022
 (in millions, except per share amounts)
Net earnings attributable to common stockholders$164 $438 $1,251 $2,486 
Basic earnings per common share:    
Weighted-average common shares outstanding192.4 200.2 194.4 205.6 
Net earnings attributable to common stockholders$0.85 $2.19 $6.44 $12.09 
Diluted earnings per common share:    
Weighted-average common shares outstanding192.4 200.2 194.4 205.6 
Dilutive common shares—stock-based awards0.5 0.7 0.5 0.9 
Diluted weighted-average common shares outstanding192.9 200.9 194.9 206.5 
Net earnings attributable to common stockholders$0.85 $2.18 $6.42 $12.04