| RELATED PARTY TRANSACTIONS (Details) - Subsidiaries - China Joint Venture - USD ($) $ in Millions | 12 Months Ended | |
|---|---|---|
| Dec. 31, 2019 | Dec. 31, 2018 | |
| Related Party Transactions | ||
| Due from related parties | $ 6.1 | $ 6.1 | 
| Company's Joint Venture Partner | ||
| Related Party Transactions | ||
| Due from related parties | 1.5 | 1.5 | 
| Notes Receivable | ||
| Related Party Transactions | ||
| Amount of related party transaction | $ 0.0 | 4.0 | 
| Related party transaction, rate | 3.00% | |
| Notes Receivable | Company's Joint Venture Partner | ||
| Related Party Transactions | ||
| Amount of related party transaction | $ 0.0 | $ 1.0 | 
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- Definition For an unclassified balance sheet, amounts due from related parties including affiliates, employees, joint ventures, officers and stockholders, immediate families thereof, and pension funds. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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