EARNINGS PER SHARE (Tables)

9 Months Ended

Sep. 30, 2016

Earnings Per Share, Basic and Diluted [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2016		2015		2016		2015
Amounts attributable to Quest Diagnostics’ stockholders:
Net income attributable to Quest Diagnostics	$	192	$	342	$	490	$	521
Less: Earnings allocated to participating securities	2		2		3		3
Earnings available to Quest Diagnostics’ common stockholders – basic and diluted	$	190	$	340	$	487	$	518
Weighted average common shares outstanding – basic	139		144		141		144
Effect of dilutive securities:
Stock options and performance share units	3		1		2		1
Weighted average common shares outstanding – diluted	142		145		143		145
Earnings per share attributable to Quest Diagnostics’ common stockholders:
Basic	$	1.37	$	2.37	$	3.46	$	3.61
Diluted	$	1.34	$	2.35	$	3.42	$	3.58

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

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,
	2016	2015	2016	2015
Stock options and performance share units	—	2	1	2