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LONG-TERM DEBT - Schedule Of Debt (Details) - USD ($)
$ in Millions
Jun. 30, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Long-term Debt, Total $ 197.1 $ 188.2
Term Loan A    
Debt Instrument [Line Items]    
Long-term Debt, Gross 199.0 199.5
Accrued interest payable 16.2 10.2
Unamortized discount and debt issuance costs (18.1) (21.5)
Long-term Debt, Total 197.1 188.2
Term Loan A | Term Loan A    
Debt Instrument [Line Items]    
Long-term Debt, Gross 99.0 99.5
Term Loan A | Term Loan B    
Debt Instrument [Line Items]    
Long-term Debt, Gross $ 100.0 $ 100.0