EARNINGS PER SHARE (Tables)

6 Months Ended

Jun. 30, 2022

Earnings Per Share [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 June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
Amounts attributable to Quest Diagnostics’ common stockholders:
Net income attributable to Quest Diagnostics	$	234	$	631	$	589	$	1,100
Less: Earnings allocated to participating securities	1		3		2		4
Earnings available to Quest Diagnostics’ common stockholders – basic and diluted	$	233	$	628	$	587	$	1,096
Weighted average common shares outstanding – basic	117		125		118		129
Effect of dilutive securities:
Stock options and performance share units	2		2		2		2
Weighted average common shares outstanding – diluted	119		127		120		131
Earnings per share attributable to Quest Diagnostics’ common stockholders:
Basic	$	2.00	$	5.05	$	4.97	$	8.52
Diluted	$	1.96	$	4.96	$	4.88	$	8.38

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 June 30,		Six Months Ended June 30,
	2022	2021	2022	2021
Stock options and performance share units	1	1	—	1