CONTRACT BALANCES - Hospital Operations and Other Segment (Details) - Hospital Operations and other - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
|
| Receivables | ||
| Balance at beginning of period | $ 171 | $ 0 |
| Balance at end of period | 158 | 0 |
| Increase/(decrease) | $ (13) | $ 0 |
| Contract assets, percentage to be reclassified to receivable within 90 days | 89.00% | |