EARNINGS PER SHARE

6 Months Ended

Jun. 30, 2018

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 June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Amounts attributable to Quest Diagnostics’ common stockholders:
Net income attributable to Quest Diagnostics	$	219	$	193	$	396	$	357
Less: Earnings allocated to participating securities	—		—		1		1
Earnings available to Quest Diagnostics’ common stockholders – basic and diluted	$	219	$	193	$	395	$	356
Weighted average common shares outstanding – basic	136		137		136		137
Effect of dilutive securities:
Stock options and performance share units	3		3		3		3
Weighted average common shares outstanding – diluted	139		140		139		140
Earnings per share attributable to Quest Diagnostics’ common stockholders:
Basic	$	1.60	$	1.40	$	2.90	$	2.59
Diluted	$	1.57	$	1.37	$	2.84	$	2.53

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

	Three Months Ended June 30,		Six Months Ended June 30,
	2018	2017	2018	2017
Stock options	2	2	2	1