NET OPERATING REVENUES - Conifer (Details) - Conifer - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
|
| Disaggregation of Revenue [Line Items] | ||
| Net operating revenues | $ 404 | $ 402 |
| Revenue cycle services | Tenet | ||
| Disaggregation of Revenue [Line Items] | ||
| Net operating revenues | 144 | 147 |
| Revenue cycle services | Non-Tenet | ||
| Disaggregation of Revenue [Line Items] | ||
| Net operating revenues | 232 | 224 |
| Other services | Tenet | ||
| Disaggregation of Revenue [Line Items] | ||
| Net operating revenues | 6 | 12 |
| Other services | Non-Tenet | ||
| Disaggregation of Revenue [Line Items] | ||
| Net operating revenues | $ 22 | $ 19 |
| Revenue from other sources | ||
| Disaggregation of Revenue [Line Items] | ||
| Net operating revenues, percentage of total | 7.00% | |