EARNINGS PER SHARE (Tables)

3 Months Ended

Mar. 31, 2015

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 (in millions, except per share data):

	Three Months Ended March 31,
	2015		2014
Amounts attributable to Quest Diagnostics’ stockholders:
Net income attributable to Quest Diagnostics	$	61	$	104
Less: Earnings allocated to participating securities	—		1
Earnings available to Quest Diagnostics’ common stockholders – basic and diluted	$	61	$	103
Weighted average common shares outstanding – basic	144		144
Effect of dilutive securities:
Stock options and performance share units	2		1
Weighted average common shares outstanding – diluted	146		145
Earnings per share attributable to Quest Diagnostics’ common stockholders:
Basic	$	0.42	$	0.72
Diluted	$	0.42	$	0.71

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 (shares in millions):

	Three Months Ended March 31,
	2015	2014
Stock options and performance share units	1	6