EARNINGS PER SHARE

3 Months Ended

Mar. 31, 2017

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,
	2017		2016
Amounts attributable to Quest Diagnostics’ stockholders:
Net income attributable to Quest Diagnostics	$	164	$	103
Less: Earnings allocated to participating securities	1		—
Earnings available to Quest Diagnostics’ common stockholders – basic and diluted	$	163	$	103
Weighted average common shares outstanding – basic	137		143
Effect of dilutive securities:
Stock options and performance share units	4		1
Weighted average common shares outstanding – diluted	141		144
Earnings per share attributable to Quest Diagnostics’ common stockholders:
Basic	$	1.19	$	0.72
Diluted	$	1.16	$	0.71

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

	Three Months Ended March 31,
	2017	2016
Stock options and performance share units	1	3