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REVENUE Disaggregated Revenue Table (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Disaggregation of Revenue [Line Items] |  |  |  |  |
Accounts Receivable, Allowance for Credit Loss | $ 34.1 |  | $ 34.1 |  | $ 32.7
Unbilled Services, Allowance for Credit Loss | 1.8 |  | 1.8 |  | 7.5
Note Receivable, Allowance for Credit Loss | 0.7 |  | 0.7 |  | 0.7
Allowance for Credit Loss | 36.6 |  | 36.6 |  | 40.9
Current Expected Credit Losses Opening Balance Sheet Impact on Retained Earnings |  |  | 3.4 |  |
Allowance for Credit Loss, Write Off |  |  | 7.7 |  |
Deferred Revenue, Revenue Recognized | 26.8 | $ 20.2 | 77.8 | $ 72.8 |
Contract with Customer, Asset, before Allowance for Credit Loss | 159.3 |  | 159.3 |  | 192.9
Contract with Customer, Liability | 388.3 |  | 388.3 |  | 421.7
Unbilled Contracts Receivable | $ 157.5 |  | $ 157.5 |  | 185.4
Percent of Revenue Contributed | 100.00% | 100.00% | 100.00% | 100.00% |
Revenues | $ 3,220.9 | $ 3,033.7 | $ 6,397.5 | $ 6,071.5 |
Accounts Receivable, after Allowance for Credit Loss, Current | 2,088.9 |  | 2,088.9 |  | 1,913.3
Allowance for Credit Loss, Receivable, Other, Current | (1.8) |  | (1.8) |  | (7.5)
Contract with Customer, Asset, after Allowance for Credit Loss, Current | $ 157.5 |  | $ 157.5 |  | 185.4
Europe [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 9.00% | 9.00% | 9.00% | 9.00% |
North America |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 87.00% | 87.00% | 87.00% | 87.00% |
Other countries [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 4.00% | 4.00% | 4.00% | 4.00% |
UNITED STATES |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 83.80% | 83.60% | 83.70% | 83.90% |
Revenues | $ 2,698.8 | $ 2,537.0 | $ 5,353.4 | $ 5,094.4 |
Medicare and Medicaid [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 8.00% | 8.00% | 8.00% | 8.00% |
LabCorp Diagnostics [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 78.00% | 77.00% | 78.00% | 78.00% |
LabCorp Diagnostics [Member] | Europe [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 0.00% | 0.00% | 0.00% | 0.00% |
LabCorp Diagnostics [Member] | North America |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 78.00% | 77.00% | 78.00% | 78.00% |
LabCorp Diagnostics [Member] | Other countries [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 0.00% | 0.00% | 0.00% | 0.00% |
LabCorp Diagnostics [Member] | Client [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 24.00% | 24.00% | 24.00% | 25.00% |
LabCorp Diagnostics [Member] | Client [Member] | Europe [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 0.00% | 0.00% | 0.00% | 0.00% |
LabCorp Diagnostics [Member] | Client [Member] | North America |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 24.00% | 24.00% | 24.00% | 25.00% |
LabCorp Diagnostics [Member] | Client [Member] | Other countries [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 0.00% | 0.00% | 0.00% | 0.00% |
LabCorp Diagnostics [Member] | Self-Pay [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 10.00% | 10.00% | 10.00% | 10.00% |
LabCorp Diagnostics [Member] | Self-Pay [Member] | Europe [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 0.00% | 0.00% | 0.00% | 0.00% |
LabCorp Diagnostics [Member] | Self-Pay [Member] | North America |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 10.00% | 10.00% | 10.00% | 10.00% |
LabCorp Diagnostics [Member] | Self-Pay [Member] | Other countries [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 0.00% | 0.00% | 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% | 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% | 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% | 0.00% | 0.00% |
LabCorp Diagnostics [Member] | Third party [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 36.00% | 35.00% | 36.00% | 35.00% |
LabCorp Diagnostics [Member] | Third party [Member] | Europe [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 0.00% | 0.00% | 0.00% | 0.00% |
LabCorp Diagnostics [Member] | Third party [Member] | North America |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 36.00% | 35.00% | 36.00% | 35.00% |
LabCorp Diagnostics [Member] | Third party [Member] | Other countries [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 0.00% | 0.00% | 0.00% | 0.00% |
Covance Drug Development [Member] | Biopharmaceutical and medical device companies [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed |  | 23.00% |  |  |
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 |  | 10.00% |  |  |
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 | $ 1,331.4 |  | $ 1,331.4 |  | 1,135.2
Drug Development |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 22.00% |  |  |  |
Accounts Receivable, before Allowance for Credit Loss | $ 791.6 |  | $ 791.6 |  | $ 810.8
Drug Development | Biopharmaceutical and medical device companies [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 22.00% |  | 22.00% | 22.00% |
Drug Development | Biopharmaceutical and medical device companies [Member] | Europe [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 9.00% |  | 9.00% | 9.00% |
Drug Development | Biopharmaceutical and medical device companies [Member] | North America |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 9.00% |  | 9.00% | 9.00% |
Drug Development | Biopharmaceutical and medical device companies [Member] | Other countries [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of Revenue Contributed | 4.00% |  | 4.00% | 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 |  |  | 5.7 |  |
Accounts Receivable [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Current Expected Credit Losses Opening Balance Sheet Impact on Retained Earnings |  |  | 3.4 |  |
Allowance for Credit Loss, Write Off |  |  | $ 2.0 |  |

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