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FAIR VALUE MEASUREMENTS (Narrative) (Details) - USD ($)			3 Months Ended	9 Months Ended
	Jul. 01, 2015	Apr. 18, 2014	Sep. 30, 2015	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Jan. 02, 2013
Business Acquisition [Line Items]
Cash received in connection with call option exercise price				$ 51,000,000	$ 0
Contingent consideration, liability		$ 26,000,000
Fair value of debt			$ 3,800,000,000	3,800,000,000		$ 4,200,000,000
Fair value in excess of carrying value of debt			116,000,000	116,000,000		416,000,000
Contingent Consideration [Member] | Other Operating (Income) Expense [Member]
Business Acquisition [Line Items]
Included in earnings			0	0
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%
Subsidiaries [Member]
Business Acquisition [Line Items]
Deferred consideration	$ 50,000,000
Cash received in connection with call option exercise price	$ 50,000,000
Summit Health, Inc. [Member]
Business Acquisition [Line Items]
Contingent consideration, liability			0	0		$ 13,000,000
Contingent consideration value high		$ 25,000,000
Steward Health Care Systems, LLC [Member] [Member]
Business Acquisition [Line Items]
Contingent consideration value high			$ 4,000,000	$ 4,000,000
UMass [Member]
Business Acquisition [Line Items]
Percentage of equity interest expected to be divested							18.90%
Ownership percentage by noncontrolling owners	18.90%
UMass [Member] | Subsidiaries [Member]
Business Acquisition [Line Items]
Ownership percentage by noncontrolling owners	18.90%

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