v3.25.1
REVENUES Disaggregated Revenue Table (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 100.00% 100.00%
Revenues $ 3,345.1 $ 3,176.6
Europe [Member]    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 9.00% 9.00%
North America    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 87.00% 87.00%
Other countries [Member]    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 4.00% 4.00%
UNITED STATES    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 84.10% 83.60%
Revenues $ 2,813.8 $ 2,654.6
Medicare and Medicaid [Member]    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 8.00% 8.00%
LabCorp Diagnostics [Member]    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed   78.00%
Diagnostics    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 78.00% 78.00%
Diagnostics | Europe [Member]    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 0.00% 0.00%
Diagnostics | North America    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 78.00% 78.00%
Diagnostics | Other countries [Member]    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 0.00% 0.00%
Diagnostics | Client [Member]    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 24.00% 25.00%
Diagnostics | Client [Member] | Europe [Member]    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 0.00% 0.00%
Diagnostics | Client [Member] | North America    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 24.00% 25.00%
Diagnostics | Client [Member] | Other countries [Member]    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 0.00% 0.00%
Diagnostics | Self-Pay [Member]    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 10.00% 10.00%
Diagnostics | Self-Pay [Member] | Europe [Member]    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 0.00% 0.00%
Diagnostics | Self-Pay [Member] | North America    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 10.00% 10.00%
Diagnostics | Self-Pay [Member] | Other countries [Member]    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 0.00% 0.00%
Diagnostics | Medicare and Medicaid [Member] | Europe [Member]    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 0.00% 0.00%
Diagnostics | Medicare and Medicaid [Member] | North America    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 8.00% 8.00%
Diagnostics | Medicare and Medicaid [Member] | Other countries [Member]    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 0.00% 0.00%
Diagnostics | Third party [Member]    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 36.00% 35.00%
Diagnostics | Third party [Member] | Europe [Member]    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 0.00% 0.00%
Diagnostics | Third party [Member] | North America    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 36.00% 35.00%
Diagnostics | Third party [Member] | Other countries [Member]    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 0.00% 0.00%
Biopharma Laboratory Services    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 22.00% 22.00%
Biopharma Laboratory Services | Biopharmaceutical and medical device companies [Member]    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 22.00% 22.00%
Biopharma Laboratory Services | Biopharmaceutical and medical device companies [Member] | Europe [Member]    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 9.00% 9.00%
Biopharma Laboratory Services | Biopharmaceutical and medical device companies [Member] | North America    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 9.00% 9.00%
Biopharma Laboratory Services | Biopharmaceutical and medical device companies [Member] | Other countries [Member]    
Disaggregation of Revenue [Line Items]    
Percent of Revenue Contributed 4.00% 4.00%