EARNINGS PER SHARE (Tables)

3 Months Ended

Mar. 31, 2020

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,
	2020		2019
Amounts attributable to Quest Diagnostics’ common stockholders:
Net income attributable to Quest Diagnostics	$	99	$	164
Less: Earnings allocated to participating securities	—		1
Earnings available to Quest Diagnostics’ common stockholders – basic and diluted	$	99	$	163
Weighted average common shares outstanding – basic	134		134
Effect of dilutive securities:
Stock options and performance share units	1		2
Weighted average common shares outstanding – diluted	135		136
Earnings per share attributable to Quest Diagnostics’ common stockholders:
Basic	$	0.74	$	1.22
Diluted	$	0.73	$	1.20

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,
	2020	2019
Stock options	2	4