BASIS OF FINANCIAL STATEMENT PRESENTATION (Details)	3 Months Ended	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2016	Jun. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ownership percentage below which investments are generally accounted for on the cost method (in thousandths)	20.00%
LabCorp Diagnostics [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percent of Revenue Contributed	69.70%	69.50%
Covance Drug Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percent of Revenue Contributed	30.30%		30.50%