BASIS OF PRESENTATION - Debt repurchase transactions (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022
Debt Instrument [Line Items]
Gain on Extinguishment	$ 97.5	$ (96.4)
Senior Subordinated Notes 5.875 Due 2026 [Member]
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5.875%
Related And Non Related Parties [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount	$ 169.7
Reacquisition Cost	101.5
Gain on Extinguishment	97.5
Accrued Interest Paid	3.4
Related Party
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount	80.0
Reacquisition Cost	50.2
Gain on Extinguishment	43.2
Accrued Interest Paid	1.2
Nonrelated Party [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount	89.7
Reacquisition Cost	51.3
Gain on Extinguishment	54.3
Accrued Interest Paid	2.2
Second Lien Notes due 2026 \| Related Party
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount	75.9
Reacquisition Cost	48.5
Gain on Extinguishment	40.9
Accrued Interest Paid	1.1
Second Lien Notes due 2026 \| Nonrelated Party [Member]
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount	89.7
Reacquisition Cost	51.3
Gain on Extinguishment	54.3
Accrued Interest Paid	2.2
5.875% Senior Subordinated Notes due 2026 \| Related Party
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount	4.1
Reacquisition Cost	1.7
Gain on Extinguishment	2.3
Accrued Interest Paid	$ 0.1

Contractual interest rate for funds borrowed, under the debt agreement.

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