EARNINGS (LOSS) PER SHARE (Tables)

12 Months Ended

Dec. 31, 2023

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The computation of basic and diluted earnings per common share for the years ended December 31, 2023, 2022 and 2021 is as follows (in millions, except per share data):

	2023		2022		2021
Amounts attributable to Quest Diagnostics’ common stockholders:
Net income attributable to Quest Diagnostics	$	854	$	946	$	1,995
Less: Earnings allocated to participating securities	4		4		7
Earnings available to Quest Diagnostics’ common stockholders – basic and diluted	$	850	$	942	$	1,988
Weighted average common shares outstanding – basic	112		116		125
Effect of dilutive securities:
Stock options and performance share units	1		2		3
Weighted average common shares outstanding – diluted	113		118		128
Earnings per share attributable to Quest Diagnostics’ common stockholders:
Basic	$	7.59	$	8.10	$	15.85
Diluted	$	7.49	$	7.97	$	15.55