v3.26.3
EARNINGS PER SHARE
 9 Months Ended
Sep. 30, 2026
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 September 30,Nine Months Ended September 30,
2026202520262025
Amounts attributable to Quest Diagnostics’ common stockholders:
Net income attributable to Quest Diagnostics$312 $245 $884 $747 
Less: Earnings allocated to participating securities2 2 4 4 
Earnings available to Quest Diagnostics’ common stockholders – basic and diluted
$310 $243 $880 $743 
Weighted average common shares outstanding – basic110 112 110 112 
Effect of dilutive securities:
Stock options and performance share units2 1 2 1 
Weighted average common shares outstanding – diluted112 113 112 113 
Earnings per share attributable to Quest Diagnostics’ common stockholders:
Basic$2.82 $2.18 $7.97 $6.66 
Diluted$2.78 $2.16 $7.86 $6.57