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EARNINGS (LOSS) PER SHARE (Tables)

12 Months Ended

Dec. 31, 2022

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The computation of basic and diluted earnings per common share is as follows (in millions, except per share data):

			2022						2021						2020
Amounts attributable to Quest Diagnostics’ common stockholders:
Net income attributable to Quest Diagnostics			$	946					$	1,995					$	1,431
Less: Earnings allocated to participating securities			4						7						6
Earnings available to Quest Diagnostics’ common stockholders – basic and diluted			$	942					$	1,988					$	1,425
Weighted average common shares outstanding – basic			116						125						134
Effect of dilutive securities:
Stock options and performance share units			2						3						2
Weighted average common shares outstanding – diluted			118						128						136
Earnings per share attributable to Quest Diagnostics’ common stockholders:
Basic			$	8.10					$	15.85					$	10.62
Diluted			$	7.97					$	15.55					$	10.47

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:

			2022						2021						2020
Stock options and performance share units			—						—						1

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- References

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- Definition

Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

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- Definition

Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

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