SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND PRACTICES - Additional Information (Details)	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2020 employee Location country	Jun. 30, 2020 employee segment Location customer country	Dec. 31, 2019
Accounting Policies [Abstract]
Number of operating segments | segment		3
Number of locations in which company operates (more than) | Location	200	200
Number of countries in which the company operates | country	20	20
Number of employees | employee	5,700	5,700
Significant Accounting Policies [Line Items]
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201602Member
Sales Revenue, Net | Customer Concentration Risk
Significant Accounting Policies [Line Items]
Number of customers accounted for more than specified percentage of consolidated revenues | customer		0
Executive Officer | Minimum
Significant Accounting Policies [Line Items]
Temporary salary reduction (percent)	0.15
Executive Officer | Maximum
Significant Accounting Policies [Line Items]
Temporary salary reduction (percent)	0.20
Board Of Directors
Significant Accounting Policies [Line Items]
Related party, decrease in cash compensation	0.20