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FAIR VALUE MEASUREMENTS (Narrative) (Details) - USD ($) | Apr. 18, 2014 | Mar. 31, 2016 | Dec. 31, 2015 | Jun. 30, 2015
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Fair Value Disclosures [Abstract] |  |  |  |
Fair value of debt |  | $ 4,000,000,000 | $ 3,700,000,000 |
Business Acquisition [Line Items] |  |  |  |
Contingent consideration, liability | $ 26,000,000 |  |  |
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% |  |  |
Summit Health, Inc. [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Contingent consideration, liability |  |  |  | $ 0
Steward Health Care Systems, LLC [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Contingent consideration value high |  | $ 4,000,000 |  |

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