EARNINGS PER SHARE

9 Months Ended

Sep. 30, 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 September 30,				Nine Months Ended September 30,
	2017		2016		2017		2016
Amounts attributable to Quest Diagnostics’ common stockholders:
Net income attributable to Quest Diagnostics	$	161	$	192	$	518	$	490
Less: Earnings allocated to participating securities	1		2		2		3
Earnings available to Quest Diagnostics’ common stockholders – basic and diluted	$	160	$	190	$	516	$	487
Weighted average common shares outstanding – basic	137		139		137		141
Effect of dilutive securities:
Stock options and performance share units	3		3		3		2
Weighted average common shares outstanding – diluted	140		142		140		143
Earnings per share attributable to Quest Diagnostics’ common stockholders:
Basic	$	1.18	$	1.37	$	3.77	$	3.46
Diluted	$	1.15	$	1.34	$	3.68	$	3.42

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

	Three Months Ended September 30,		Nine Months Ended September 30,
	2017	2016	2017	2016
Stock options	2	—	1	1