v3.25.1
EARNINGS PER SHARE
 3 Months Ended
Mar. 31, 2025
Earnings Per Share [Abstract]  
EARNINGS (LOSS) PER SHARE EARNINGS PER SHARE
    The computation of basic and diluted earnings per common share was as follows (in millions, except per share data):
Three Months Ended March 31,
 20252024
Amounts attributable to Quest Diagnostics’ common stockholders:  
Net income attributable to Quest Diagnostics$220 $194 
Less: Earnings allocated to participating securities1 1 
Earnings available to Quest Diagnostics’ common stockholders – basic and diluted
$219 $193 
Weighted average common shares outstanding – basic111 111 
Effect of dilutive securities:  
Stock options and performance share units2 1 
Weighted average common shares outstanding – diluted113 112 
Earnings per share attributable to Quest Diagnostics’ common stockholders:  
Basic$1.97 $1.74 
Diluted$1.94 $1.72 
    

    The following securities were not included in the calculation of diluted earnings per share due to their antidilutive effect:
Three Months Ended March 31,
20252024
Stock options and performance share units— 1