INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Income Tax Contingency [Line Items]
Effective income tax rate, percent	404.42%	5.19%	43.20%	58.16%
Unrecognized tax benefits, period increase			$ 57
Unrecognized tax benefits	$ 59		59
Unrecognized tax benefits that, if recognized, would impact the effective tax rate	19		$ 19		$ 2
Business combination adjustment other liabilities, tax matters	(87)
Indemnified Tax Liability
Income Tax Contingency [Line Items]
Business combination adjustment other liabilities, tax matters	$ (54)