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REVENUE RECOGNITION AND ALLOWANCE FOR CREDIT LOSSES (Details) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Segment Reporting Information [Line Items] |  |  |  |  |
Percentage of net revenues | 100.00% | 100.00% | 100.00% | 100.00% |
Net accounts receivable | 100.00% |  | 100.00% |  | 100.00%
DIS business |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Percentage of net revenues | 97.00% | 96.00% | 97.00% | 96.00% |
Net accounts receivable | 96.00% |  | 96.00% |  | 95.00%
DIS business | Healthcare Insurers |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Percentage of net revenues | 35.00% | 35.00% | 36.00% | 36.00% |
Net accounts receivable | 30.00% |  | 30.00% |  | 22.00%
DIS business | Healthcare Insurers | Fee-for-service |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Percentage of net revenues | 33.00% | 32.00% | 33.00% | 33.00% |
DIS business | Healthcare Insurers | Capitated |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Percentage of net revenues | 2.00% | 3.00% | 3.00% | 3.00% |
DIS business | Government Payers |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Percentage of net revenues | 10.00% | 15.00% | 12.00% | 15.00% |
Net accounts receivable | 6.00% |  | 6.00% |  | 11.00%
DIS business | Client Payers |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Percentage of net revenues | 40.00% | 33.00% | 37.00% | 32.00% |
Net accounts receivable | 48.00% |  | 48.00% |  | 42.00%
DIS business | Patients |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Percentage of net revenues | 12.00% | 13.00% | 12.00% | 13.00% |
Net accounts receivable | 12.00% |  | 12.00% |  | 20.00%
DIS business | Minimum |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Percentage of net revenues | 95.00% | 95.00% | 95.00% | 95.00% |
All other operating segments | DS Businesses |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Percentage of net revenues | 3.00% | 4.00% | 3.00% | 4.00% |
Net accounts receivable | 4.00% |  | 4.00% |  | 5.00%

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