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REVENUES (Tables) | 12 Months Ended
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Dec. 31, 2025
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The Company’s revenue by segment payer groups is as follows:
| Year Ended December 31, 2025 |  | Year Ended December 31, 2024 |  |  |  |  | Year Ended December 31, 2023
| North America |  | Europe |  |  |  |  |  | Other |  | Total |  | North America |  | Europe |  | Other |  | Total |  |  |  |  | North America |  | Europe |  | Other |  | Total
Dx: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Clients | 23 | % |  | — | % |  |  |  |  |  | — | % |  | 23 | % |  | 24 | % |  | — | % |  | — | % |  | 24 | % |  |  |  |  | 24 | % |  | — | % |  | — | % |  | 24 | %
Patients | 10 | % |  | — | % |  |  |  |  |  | — | % |  | 10 | % |  | 10 | % |  | — | % |  | — | % |  | 10 | % |  |  |  |  | 9 | % |  | — | % |  | — | % |  | 9 | %
Medicare and Medicaid | 8 | % |  | — | % |  |  |  |  |  | — | % |  | 8 | % |  | 8 | % |  | — | % |  | — | % |  | 8 | % |  |  |  |  | 8 | % |  | — | % |  | — | % |  | 8 | %
Third party | 37 | % |  | — | % |  |  |  |  |  | — | % |  | 37 | % |  | 36 | % |  | — | % |  | — | % |  | 36 | % |  |  |  |  | 36 | % |  | — | % |  | — | % |  | 36 | %
Total Dx revenues | 78 | % |  | — | % |  |  |  |  |  | — | % |  | 78 | % |  | 78 | % |  | — | % |  | — | % |  | 78 | % |  |  |  |  | 77 | % |  | — | % |  | — | % |  | 77 | %
BLS: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pharmaceutical, biotechnology, medical device, and diagnostic companies, and CROs | 9 | % |  | 9 | % |  |  |  |  |  | 4 | % |  | 22 | % |  | 9 | % |  | 9 | % |  | 4 | % |  | 22 | % |  |  |  |  | 10 | % |  | 9 | % |  | 4 | % |  | 23 | %
Total Revenues | 87 | % |  | 9 | % |  |  |  |  |  | 4 | % |  | 100 | % |  | 87 | % |  | 9 | % |  | 4 | % |  | 100 | % |  |  |  |  | 87 | % |  | 9 | % |  | 4 | % |  | 100 | %
Contract with Customer, Contract Asset, Contract Liability, and Receivable | The following table provides information about accounts receivable, unbilled services, and unearned revenue from contracts with customers:
| December 31,
| 2025 |  | 2024
Dx accounts receivable | $ | 1,349.0 |  |  | $ | 1,259.3 |
BLS accounts receivable | 791.2 |  |  | 729.5 |
Less: BLS allowance for credit losses | (36.4) |  |  | (44.7) |
Accounts receivable, net | $ | 2,103.8 |  |  | $ | 1,944.1 |
Gross unbilled services | $ | 164.0 |  |  | $ | 160.5 |
Less: reserve for unbilled services | (7.1) |  |  | (7.6) |
Unbilled services, net | $ | 156.9 |  |  | $ | 152.9 |
Accounts Receivable, Allowance for Credit Loss | BLS estimates future expected credit losses on Accounts receivable, net and Unbilled services, net over the remaining collection period of the instrument. The rollforward for the allowance for credit losses was as follows:
| Accounts Receivable, net |  | Unbilled Services, net |  | Total
Allowance for credit losses at December 31, 2023 | $ | 32.7 |  |  | $ | 7.5 |  |  | $ | 40.2 |
Credit loss expense | 14.6 |  |  | 0.1 |  |  | 14.7 |
Write-offs | (2.2) |  |  | — |  |  | (2.2) |
Foreign currency impact | (0.4) |  |  | — |  |  | (0.4) |
Allowance for credit losses at December 31, 2024 | 44.7 |  |  | 7.6 |  |  | 52.3 |
Credit loss expense | 4.3 |  |  | — |  |  | 4.3 |
Write-offs | (14.3) |  |  | (0.8) |  |  | (15.1) |
Foreign currency impact | 1.7 |  |  | 0.3 |  |  | 2.0 |
Allowance for credit losses at December 31, 2025 | $ | 36.4 |  |  | $ | 7.1 |  |  | $ | 43.5 |

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-10 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 + Details
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