FAIR VALUE MEASUREMENTS - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)
Fair Value Disclosures [Abstract]
Increase in liability as a result of increasing the profit element and risk premium input by 100 basis points	$ 0.2
Decrease in liability as a result of decreasing the profit element and risk premium input by 100 basis points	0.2
Decrease in liability as a result of increasing the discount rate by 100 basis points	0.8
Increase in liability as a result of decreasing the discount rate by 100 basis points	$ 0.9