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v3.19.3.a.u2

REVENUE RECOGNITION (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Segment Reporting Information [Line Items] |  |  |  |
Percentage of net revenues |  | 100.00% | 100.00% | 100.00%
Change in estimate, revenue and receivables | $ 35 |  |  |
Percentage of net accounts receivable | 100.00% | 100.00% | 100.00% |
Healthcare insurers: | Minimum |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Collection of consideration |  | 30 days |  |
Healthcare insurers: | Maximum |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Collection of consideration |  | 60 days |  |
Government payers |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Collection of consideration |  | 30 days |  |
Client payers | Minimum |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Collection of consideration |  | 60 days |  |
Client payers | Maximum |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Collection of consideration |  | 90 days |  |
Patients | Minimum |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Collection of consideration |  | 30 days |  |
Patients | Maximum |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Collection of consideration |  | 60 days |  |
DS | Minimum |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Collection of consideration |  | 30 days |  |
DS | Maximum |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Collection of consideration |  | 60 days |  |
DIS business |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Percentage of net revenues |  | 96.00% | 96.00% | 96.00%
Percentage of net accounts receivable | 96.00% | 95.00% | 96.00% |
DIS business | Minimum |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Percentage of net revenues |  | 95.00% | 95.00% | 95.00%
DIS business | Healthcare insurers: |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Percentage of net revenues |  | 36.00% | 35.00% | 37.00%
Percentage of net accounts receivable | 22.00% | 22.00% | 22.00% |
DIS business | Healthcare insurers: | Fee-for-service |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Percentage of net revenues |  | 33.00% | 32.00% | 34.00%
DIS business | Healthcare insurers: | Capitated |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Percentage of net revenues |  | 3.00% | 3.00% | 3.00%
DIS business | Government payers |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Percentage of net revenues |  | 15.00% | 16.00% | 17.00%
Percentage of net accounts receivable | 13.00% | 11.00% | 13.00% |
DIS business | Client payers |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Percentage of net revenues |  | 32.00% | 32.00% | 30.00%
Percentage of net accounts receivable | 41.00% | 42.00% | 41.00% |
DIS business | Patients |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Percentage of net revenues |  | 13.00% | 13.00% | 12.00%
Period of billing fully reserve |  | 210 days |  |
Percentage of net accounts receivable | 20.00% | 20.00% | 20.00% |
All other operating segments | DS |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Percentage of net revenues |  | 4.00% | 4.00% | 4.00%
Percentage of net accounts receivable | 4.00% | 5.00% | 4.00% |

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