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REVENUE Disaggregated Revenue Table (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Disaggregation of Revenue [Line Items] |  |  |
Accounts Receivable, Allowance for Credit Loss | $ 34.2 |  | $ 32.7
Unbilled Services, Allowance for Credit Loss | 7.4 |  | 7.5
Note Receivable, Allowance for Credit Loss | 0.7 |  | 0.7
Allowance for Credit Loss | 42.3 |  | 40.9
Current Expected Credit Losses Opening Balance Sheet Impact on Retained Earnings | 2.4 |  |
Allowance for Credit Loss, Write Off | 1.0 |  |
Deferred Revenue, Revenue Recognized | 51.0 | $ 52.6 |
Contract with Customer, Asset, before Allowance for Credit Loss | 127.8 |  | 192.9
Contract with Customer, Liability | 377.5 |  | 421.7
Unbilled Contracts Receivable | $ 120.4 |  | 185.4
Percent of Revenue Contributed | 100.00% | 100.00% |
Revenues | $ 3,176.6 | $ 3,037.8 |
Accounts Receivable, after Allowance for Credit Loss, Current | 2,083.7 |  | 1,913.3
Allowance for Credit Loss, Receivable, Other, Current | (7.4) |  | (7.5)
Contract with Customer, Asset, after Allowance for Credit Loss, Current | $ 120.4 |  | 185.4
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 | 83.60% | 84.20% |
Revenues | $ 2,654.6 | $ 2,557.4 |
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% | 78.00% |
LabCorp Diagnostics [Member] | Europe [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed | 0.00% | 0.00% |
LabCorp Diagnostics [Member] | North America |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed | 78.00% | 78.00% |
LabCorp Diagnostics [Member] | Other countries [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed | 0.00% | 0.00% |
LabCorp Diagnostics [Member] | Client [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed | 25.00% | 25.00% |
LabCorp Diagnostics [Member] | Client [Member] | Europe [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed | 0.00% | 0.00% |
LabCorp Diagnostics [Member] | Client [Member] | North America |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed | 25.00% | 25.00% |
LabCorp Diagnostics [Member] | Client [Member] | Other countries [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed | 0.00% | 0.00% |
LabCorp Diagnostics [Member] | Self-Pay [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed | 10.00% | 9.00% |
LabCorp Diagnostics [Member] | Self-Pay [Member] | Europe [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed | 0.00% | 0.00% |
LabCorp Diagnostics [Member] | Self-Pay [Member] | North America |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed | 10.00% | 9.00% |
LabCorp Diagnostics [Member] | Self-Pay [Member] | Other countries [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed | 0.00% | 0.00% |
LabCorp Diagnostics [Member] | Medicare and Medicaid [Member] | Europe [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed | 0.00% | 0.00% |
LabCorp Diagnostics [Member] | Medicare and Medicaid [Member] | North America |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed | 8.00% | 8.00% |
LabCorp Diagnostics [Member] | Medicare and Medicaid [Member] | Other countries [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed | 0.00% | 0.00% |
LabCorp Diagnostics [Member] | Third party [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed | 35.00% | 36.00% |
LabCorp Diagnostics [Member] | Third party [Member] | Europe [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed | 0.00% | 0.00% |
LabCorp Diagnostics [Member] | Third party [Member] | North America |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed | 35.00% | 36.00% |
LabCorp Diagnostics [Member] | Third party [Member] | Other countries [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed | 0.00% | 0.00% |
Covance Drug Development [Member] | Biopharmaceutical and medical device companies [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed |  | 22.00% |
Covance Drug Development [Member] | Biopharmaceutical and medical device companies [Member] | Europe [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed |  | 9.00% |
Covance Drug Development [Member] | Biopharmaceutical and medical device companies [Member] | North America |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed |  | 9.00% |
Covance Drug Development [Member] | Biopharmaceutical and medical device companies [Member] | Other countries [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed |  | 4.00% |
Diagnostics |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed | 78.00% |  |
Accounts Receivable, before Allowance for Credit Loss | $ 1,260.9 |  | 1,135.2
Drug Development |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed | 22.00% |  |
Accounts Receivable, before Allowance for Credit Loss | $ 857.0 |  | $ 810.8
Drug Development | Biopharmaceutical and medical device companies [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed | 22.00% |  |
Drug Development | Biopharmaceutical and medical device companies [Member] | Europe [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed | 9.00% |  |
Drug Development | Biopharmaceutical and medical device companies [Member] | North America |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed | 9.00% |  |
Drug Development | Biopharmaceutical and medical device companies [Member] | Other countries [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Percent of Revenue Contributed | 4.00% |  |
Notes Receivable [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Current Expected Credit Losses Opening Balance Sheet Impact on Retained Earnings | $ 0.0 |  |
Allowance for Credit Loss, Write Off | 0.0 |  |
Unbilled Contracts Receivable [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Current Expected Credit Losses Opening Balance Sheet Impact on Retained Earnings | 0.0 |  |
Allowance for Credit Loss, Write Off | 0.1 |  |
Accounts Receivable [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Current Expected Credit Losses Opening Balance Sheet Impact on Retained Earnings | 2.4 |  |
Allowance for Credit Loss, Write Off | $ 0.9 |  |

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