EARNINGS PER SHARE

9 Months Ended

Sep. 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 September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Amounts attributable to Quest Diagnostics’ common stockholders:
Net income attributable to Quest Diagnostics	$	213	$	161	$	609	$	518
Less: Earnings allocated to participating securities	1		1		2		2
Earnings available to Quest Diagnostics’ common stockholders – basic and diluted	$	212	$	160	$	607	$	516
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	$	1.56	$	1.18	$	4.46	$	3.77
Diluted	$	1.53	$	1.15	$	4.37	$	3.68

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,
	2018	2017	2018	2017
Stock options	2	2	2	1