EARNINGS PER SHARE (Tables)

3 Months Ended

Mar. 31, 2022

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,
	2022		2021
Amounts attributable to Quest Diagnostics’ common stockholders:
Net income attributable to Quest Diagnostics	$	355	$	469
Less: Earnings allocated to participating securities	1		1
Earnings available to Quest Diagnostics’ common stockholders – basic and diluted	$	354	$	468
Weighted average common shares outstanding – basic	119		133
Effect of dilutive securities:
Stock options and performance share units	2		2
Weighted average common shares outstanding – diluted	121		135
Earnings per share attributable to Quest Diagnostics’ common stockholders:
Basic	$	2.97	$	3.52
Diluted	$	2.92	$	3.46

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,
	2022	2021
Stock options and performance share units	—	1