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FAIR VALUE MEASUREMENTS (Narrative) (Details) - USD ($) $ in Millions |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Apr. 18, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2016 | Apr. 16, 2014
Business Acquisition [Line Items] |  |  |  |  |
Contingent consideration | $ 26 |  |  |  |
Fair value of debt |  | $ 3,700 |  | $ 3,900 |
Summit Health, Inc. [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Contingent consideration | 22 | 0 | $ 13 |  |
Contingent consideration arrangements, range of outcomes, value, high | $ 25 |  |  |  |
Summit Health, Inc. [Member] | Contingent Consideration [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Included in earnings |  | $ 13 | $ 9 |  |
Steward Health Care Systems, LLC [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Contingent consideration |  |  |  |  | $ 4
Contingent consideration arrangements, range of outcomes, value, high |  |  |  | $ 4 |
Minimum [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Fair value inputs, probability of occurrence | 5.00% |  |  |  |
Discount rate | 1.50% |  |  |  |
Maximum [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Fair value inputs, probability of occurrence | 95.00% |  |  |  |
Discount rate | 2.80% |  |  |  |

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