EARNINGS PER SHARE (Tables)

9 Months Ended

Sep. 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 September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Amounts attributable to Quest Diagnostics’ common stockholders:
Net income attributable to Quest Diagnostics	$	256	$	505	$	845	$	1,605
Less: Earnings allocated to participating securities	2		2		4		6
Earnings available to Quest Diagnostics’ common stockholders – basic and diluted	$	254	$	503	$	841	$	1,599
Weighted average common shares outstanding – basic	116		123		117		127
Effect of dilutive securities:
Stock options and performance share units	2		2		2		2
Weighted average common shares outstanding – diluted	118		125		119		129
Earnings per share attributable to Quest Diagnostics’ common stockholders:
Basic	$	2.20	$	4.11	$	7.17	$	12.63
Diluted	$	2.17	$	4.02	$	7.05	$	12.41

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 September 30,		Nine Months Ended September 30,
	2022	2021	2022	2021
Stock options and performance share units	1	—	—	—