BUSINESS ACQUISITIONS (Consideration Paid) (Details) - USD ($) $ in Millions			12 Months Ended
	Apr. 18, 2014	Mar. 07, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Estimated fair value of contingent consideration	$ 26
Total consideration			$ 139	$ 63	$ 768
Solstas Lab Parnters Group [Member]
Business Acquisition [Line Items]
Cash		$ 572
Estimated fair value of contingent consideration		0
Transaction related costs due to sellers		0
Total consideration		$ 572
Summit Health, Inc. [Member]
Business Acquisition [Line Items]
Cash	125
Estimated fair value of contingent consideration	22			$ 0	$ 13
Transaction related costs due to sellers	5
Total consideration	$ 152