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INCOME TAX - Reconciliation (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Federal U.S. statutory rate	21.00%	21.00%	35.00%
Valuation allowance	4.60%	1.40%	(3.20%)
Foreign interest income not subject to tax	(4.50%)	(1.70%)	(2.20%)
Tax credits	(3.90%)	(0.50%)	(0.30%)
Foreign-derived intangible income deduction	(2.70%)	(1.60%)	0.00%
Uncertain tax positions	(2.60%)	(0.90%)	(0.50%)
Share-based compensation expense	(2.50%)	(2.10%)	(4.20%)
State income taxes, net of federal income tax benefit	1.00%	2.70%	1.90%
Foreign income taxes	(0.70%)	(0.50%)	(12.00%)
Federal U.S. transition tax	0.00%	(4.10%)	16.20%
Federal U.S. rate reduction	0.00%	0.00%	(55.60%)
Other SAB 118 adjustments	0.00%	(0.60%)	0.00%
Other	2.30%	0.70%	(0.90%)
Effective tax rate	12.00%	13.80%	(25.80%)

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