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OVERVIEW AND BASIS OF PRESENTATION (OVERVIEW) (DETAILS) - employee
Sep. 30, 2017
Dec. 31, 2015
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]    
Number of employees 49,500  
Percepta LLC    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]    
ownership percentage 55.00%  
Iknowtion    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]    
ownership percentage   80.00%