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Document and Entity Information Document - USD ($)
shares in Millions, $ in Billions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2020
Feb. 27, 2023
Jun. 30, 2022
Document Information [Line Items]        
Auditor Firm ID 34 238    
Auditor Location Raleigh, North Carolina      
Auditor Name Deloitte & Touche LLP      
ICFR Auditor Attestation Flag true      
Entity Voluntary Filers No      
Document Type 10-K      
Document Annual Report true      
Document Period End Date Dec. 31, 2022      
Document Transition Report false      
Entity File Number 1-11353      
Entity Registrant Name LABORATORY CORPORATION OF AMERICA HOLDINGS      
Entity Central Index Key 0000920148      
Current Fiscal Year End Date --12-31      
Document Fiscal Year Focus 2021      
Document Fiscal Period Focus FY      
Amendment Flag false      
Entity Incorporation, State or Country Code DE      
Entity Tax Identification Number 13-3757370      
Entity Address, Address Line One 358 South Main Street      
Entity Address, City or Town Burlington,      
Entity Address, State or Province NC      
Entity Address, Postal Zip Code 27215      
City Area Code 336      
Local Phone Number 229-1127      
Title of 12(b) Security Common Stock, $0.10 par value      
Trading Symbol LH      
Security Exchange Name NYSE      
Entity Interactive Data Current Yes      
Entity Filer Category Large Accelerated Filer      
Entity Small Business false      
Entity Emerging Growth Company false      
Entity Shell Company false      
Entity Public Float       $ 20.2
Entity Common Stock, Shares Outstanding     88.5  
Documents Incorporated by Reference
List hereunder the following documents if incorporated by reference and the Part of the Form 10-K into which the document is incorporated:
Portions of the Registrant’s Notice of Annual Meeting and Proxy Statement to be filed no later than 120 days following December 31, 2022, are incorporated by reference into Part III.