EARNINGS PER SHARE (Tables)

3 Months Ended

Mar. 31, 2023

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 March 31,
	2023		2022
Amounts attributable to Quest Diagnostics’ common stockholders:
Net income attributable to Quest Diagnostics	$	202	$	355
Less: Earnings allocated to participating securities	1		1
Earnings available to Quest Diagnostics’ common stockholders – basic and diluted	$	201	$	354
Weighted average common shares outstanding – basic	112		119
Effect of dilutive securities:
Stock options and performance share units	1		2
Weighted average common shares outstanding – diluted	113		121
Earnings per share attributable to Quest Diagnostics’ common stockholders:
Basic	$	1.80	$	2.97
Diluted	$	1.78	$	2.92