EARNINGS PER SHARE (Tables)

3 Months Ended

Mar. 31, 2018

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 March 31,
	2018		2017
Amounts attributable to Quest Diagnostics’ common stockholders:
Net income attributable to Quest Diagnostics	$	177	$	164
Less: Earnings allocated to participating securities	1		1
Earnings available to Quest Diagnostics’ common stockholders – basic and diluted	$	176	$	163
Weighted average common shares outstanding – basic	136		137
Effect of dilutive securities:
Stock options and performance share units	3		4
Weighted average common shares outstanding – diluted	139		141
Earnings per share attributable to Quest Diagnostics’ common stockholders:
Basic	$	1.30	$	1.19
Diluted	$	1.27	$	1.16

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 March 31,
	2018	2017
Stock options	2	1