INCOME TAXES - Loss Carryforwards (Details)	12 Months Ended
	Dec. 31, 2018 USD ($) $ / shares	Dec. 31, 2017 USD ($) item $ / shares	Dec. 31, 2016 USD ($) $ / shares
Operating loss carryforwards
Statutory U.S. rate (as a percent)	21.00%	35.00%	35.00%
Provisional income tax benefit, Tax Act		$ (319,000,000)
Net discrete expense (benefit), prior year returns	$ (39,900,000)	14,400,000
Net operating loss carryforwards	217,200,000	67,300,000
Valuation allowance on deferred tax asset	184,400,000	$ 21,300,000
Number of foreign jurisdictions with a tax holiday | item		2
Number of tax incentives awarded by foreign jurisdictions | item		2
Federal
Operating loss carryforwards
Net discrete expense (benefit), prior year returns	66,000,000
Net operating loss carryforwards	200,000
State
Operating loss carryforwards
Carryforwards subject to expiration	21,700,000
International
Operating loss carryforwards
Net operating loss carryforwards	195,300,000
Carryforwards subject to expiration	172,000,000
No expiration	23,300,000
Preferential income tax rate, certain headquarter income		10.00%
Preferential income tax rate, manufacturing profits for a specific location		0.00%
Preferential income tax rate awarded under the Development and Expansion Incentive program		$ 15
Tax reduction due to tax holiday	$ 25,600,000	$ 16,900,000	$ 6,400,000
Tax holiday impact on diluted earnings per share (in dollars per share) | $ / shares	$ 0.09	$ 0.06	$ 0.02