BUSINESS ACQUISITION (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		0 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	0 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Mar. 07, 2014 Solstas Lab Parnters Group [Member]	Sep. 30, 2014 Solstas Lab Parnters Group [Member]	Sep. 30, 2014 Solstas Lab Parnters Group [Member]	Sep. 30, 2014 Solstas Lab Parnters Group [Member] Cost of Services [Member]	Sep. 30, 2014 Solstas Lab Parnters Group [Member] Cost of Services [Member]	Sep. 30, 2014 Solstas Lab Parnters Group [Member] Selling, General and Administrative Expenses [Member]	Sep. 30, 2014 Solstas Lab Parnters Group [Member] Selling, General and Administrative Expenses [Member]	Apr. 18, 2014 Summit Health, Inc. [Member]	Apr. 16, 2014 Steward Health Care Systems, LLC [Member] [Member]
Business Acquisition [Line Items]
Cash paid for acquisition					$ 572							$ 151	$ 34
Business acquisitions, net of cash acquired	2		725	180	563							123
Net revenues	1,904	1,788	5,552	5,390		90	212
Operating expenses						98	220
Integration and transaction related costs						11	17	3	3	8	14
Business Combination, Contingent Consideration Fair Value					0							22	4
Cash consideration paid					572							124	30
Business Combination, Working Capital Adjustments												9
Business Combination, Contingent Consideration Value High												25	5
Business Combination, Acquisition Related Costs					$ 0							$ 5