LONG-TERM DEBT - Schedule Of Debt (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Total	$ 236.1	$ 219.8
Accrued interest payable	7.7	0.9
Unamortized discount and debt issuance costs	(23.8)	(28.5)
Total	220.0	192.2
Term loan | Term Loan A
Debt Instrument [Line Items]
Total	99.8	99.5
Term loan | Term Loan B
Debt Instrument [Line Items]
Total	100.0	100.0
Warrants
Debt Instrument [Line Items]
Total	$ 36.3	$ 20.3