EARNINGS PER SHARE

3 Months Ended

Mar. 31, 2019

Earnings Per Share, Basic and Diluted [Abstract]

EARNINGS (LOSS) PER SHARE

EARNINGS PER SHARE

The computation of basic and diluted earnings per common share was as follows:

	Three Months Ended March 31,
	2019		2018
Amounts attributable to Quest Diagnostics’ common stockholders:
Net income attributable to Quest Diagnostics	$	164	$	177
Less: Earnings allocated to participating securities	1		1
Earnings available to Quest Diagnostics’ common stockholders – basic and diluted	$	163	$	176
Weighted average common shares outstanding – basic	134		136
Effect of dilutive securities:
Stock options and performance share units	2		3
Weighted average common shares outstanding – diluted	136		139
Earnings per share attributable to Quest Diagnostics’ common stockholders:
Basic	$	1.22	$	1.30
Diluted	$	1.20	$	1.27

The following securities were not included in the calculation of diluted earnings per share due to their antidilutive effect:

	Three Months Ended March 31,
	2019	2018
Stock options	4	2