EARNINGS PER SHARE

3 Months Ended

Mar. 31, 2016

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,
	2016		2015
Amounts attributable to Quest Diagnostics’ stockholders:
Net income attributable to Quest Diagnostics	$	102	$	61
Less: Earnings allocated to participating securities	—		—
Earnings available to Quest Diagnostics’ common stockholders – basic and diluted	$	102	$	61
Weighted average common shares outstanding – basic	143		144
Effect of dilutive securities:
Stock options and performance share units	1		2
Weighted average common shares outstanding – diluted	144		146
Earnings per share attributable to Quest Diagnostics’ common stockholders:
Basic	$	0.71	$	0.42
Diluted	$	0.70	$	0.42

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

	Three Months Ended March 31,
	2016	2015
Stock options and performance share units	3	1