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REVENUES (Tables) | 12 Months Ended
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Dec. 31, 2024
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The Company’s revenue by segment payers/customer groups is as follows:
| Year Ended December 31, 2024 |  | Year Ended December 31, 2023 |  |  |  |  | Year Ended December 31, 2022
| North America |  | Europe |  |  |  |  |  | Other |  | Total |  | North America |  | Europe |  | Other |  | Total |  |  |  |  | North America |  | Europe |  | Other |  | Total
Payer/Customer |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dx |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Clients | 24 | % |  | — | % |  |  |  |  |  | — | % |  | 24 | % |  | 24 | % |  | — | % |  | — | % |  | 24 | % |  |  |  |  | 22 | % |  | — | % |  | — | % |  | 22 | %
Patients | 10 | % |  | — | % |  |  |  |  |  | — | % |  | 10 | % |  | 9 | % |  | — | % |  | — | % |  | 9 | % |  |  |  |  | 8 | % |  | — | % |  | — | % |  | 8 | %
Medicare and Medicaid | 8 | % |  | — | % |  |  |  |  |  | — | % |  | 8 | % |  | 8 | % |  | — | % |  | — | % |  | 8 | % |  |  |  |  | 8 | % |  | — | % |  | — | % |  | 8 | %
Third party | 36 | % |  | — | % |  |  |  |  |  | — | % |  | 36 | % |  | 36 | % |  | — | % |  | — | % |  | 36 | % |  |  |  |  | 39 | % |  | — | % |  | — | % |  | 39 | %
Total Dx revenues by payer | 78 | % |  | — | % |  |  |  |  |  | — | % |  | 78 | % |  | 77 | % |  | — | % |  | — | % |  | 77 | % |  |  |  |  | 77 | % |  | — | % |  | — | % |  | 77 | %
BLS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pharmaceutical, biotechnology and medical device companies | 9 | % |  | 9 | % |  |  |  |  |  | 4 | % |  | 22 | % |  | 10 | % |  | 9 | % |  | 4 | % |  | 23 | % |  |  |  |  | 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,
| 2024 |  | 2023
Dx accounts receivable | $ | 1,259.3 |  |  | $ | 1,135.2 |
BLS accounts receivable | 729.5 |  |  | 810.8 |
Less BLS allowance for credit losses | (44.7) |  |  | (32.7) |
Accounts receivable, net | $ | 1,944.1 |  |  | $ | 1,913.3 |
Gross unbilled services | $ | 160.5 |  |  | $ | 192.9 |
Less reserve for unbilled services | (7.6) |  |  | (7.5) |
Unbilled services | $ | 152.9 |  |  | $ | 185.4 |
Unearned revenue | $ | 392.2 |  |  | $ | 421.7 |
Accounts Receivable, Allowance for Credit Loss | BLS estimates future expected losses on accounts receivable and unbilled services over the remaining collection period of the instrument. The rollforward for the allowance for credit losses is as follows:
| Accounts Receivable |  | Unbilled Services |  | Total
Allowance for credit losses at December 31, 2022 | $ | 30.8 |  |  | $ | 10.5 |  |  | $ | 41.3 |
Credit loss expense | 6.3 |  |  | — |  |  | 6.3 |
Write-offs | (4.4) |  |  | (3.0) |  |  | (7.4) |
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 |

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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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