CORPORATE BORROWINGS AND FINANCE LEASE LIABILITIES - Debt for equity exchange (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
STOCKHOLDERS' EQUITY
Reacquisition Cost			$ 2.3
Gain on Extinguishment			40.3	$ 97.5
Total debt repurchases and exchanges
STOCKHOLDERS' EQUITY
Aggregate Principal Repurchased/Exchanged	$ 311.6		311.6
Reacquisition Cost			$ 242.3
Shares of Common Stock Exchanged			31,119,648
Gain on Extinguishment			$ 101.5
Accrued Interest Paid/Exchanged			10.4
Equity Debt Repurchase
STOCKHOLDERS' EQUITY
Aggregate Principal Repurchased/Exchanged	191.4		191.4
Reacquisition Cost			$ 123.1
Shares of Common Stock Exchanged			27,545,325
Gain on Extinguishment			$ 91.1
Accrued Interest Paid/Exchanged			7.4
Cash debt repurchase
STOCKHOLDERS' EQUITY
Aggregate Principal Repurchased	57.0		57.0
Reacquisition Cost			57.2
Gain on Extinguishment			4.7
Accrued Interest Paid/Exchanged			1.5
Cash and debt for equity exchanges
STOCKHOLDERS' EQUITY
Aggregate Principal Repurchased/Exchanged	63.2		63.2
Reacquisition Cost			$ 62.0
Shares of Common Stock Exchanged			3,574,323
Gain on Extinguishment			$ 5.7
Accrued Interest Paid/Exchanged			1.5
Second Lien Notes due 2026
STOCKHOLDERS' EQUITY
Gain on Extinguishment	52.6	$ (10.8)	(38.5)	$ (95.2)
Second Lien Notes due 2026 | Equity Debt Repurchase
STOCKHOLDERS' EQUITY
Aggregate Principal Repurchased/Exchanged	191.4		191.4
Reacquisition Cost			$ 123.1
Shares of Common Stock Exchanged			27,545,325
Gain on Extinguishment			$ 91.1
Accrued Interest Paid/Exchanged			7.4
Second Lien Notes due 2026 | Cash debt repurchase
STOCKHOLDERS' EQUITY
Aggregate Principal Repurchased	50.0		50.0
Reacquisition Cost			50.5
Gain on Extinguishment			4.4
Accrued Interest Paid/Exchanged			1.4
Second Lien Notes due 2026 | Cash and debt for equity exchanges
STOCKHOLDERS' EQUITY
Aggregate Principal Repurchased/Exchanged	45.0		45.0
Reacquisition Cost			$ 45.5
Shares of Common Stock Exchanged			2,693,717
Gain on Extinguishment			$ 4.2
Accrued Interest Paid/Exchanged			1.2
5.75 % Senior Subordinated Notes due 2025
STOCKHOLDERS' EQUITY
Gain on Extinguishment	$ 0.5		$ 0.5
Stated interest rate (as a percent)	5.75%		5.75%		5.75%
5.75 % Senior Subordinated Notes due 2025 | Cash debt repurchase
STOCKHOLDERS' EQUITY
Aggregate Principal Repurchased	$ 7.0		$ 7.0
Reacquisition Cost			6.7
Gain on Extinguishment			0.3
Accrued Interest Paid/Exchanged			$ 0.1
Stated interest rate (as a percent)	5.75%		5.75%
5.75 % Senior Subordinated Notes due 2025 | Cash and debt for equity exchanges
STOCKHOLDERS' EQUITY
Aggregate Principal Repurchased/Exchanged	$ 8.6		$ 8.6
Reacquisition Cost			$ 8.4
Shares of Common Stock Exchanged			447,829
Gain on Extinguishment			$ 0.2
Accrued Interest Paid/Exchanged			$ 0.1
Stated interest rate (as a percent)	5.75%		5.75%
5.875% Senior Subordinated Notes due 2026
STOCKHOLDERS' EQUITY
Stated interest rate (as a percent)		5.875%		5.875%
5.875% Senior Subordinated Notes due 2026 | Cash and debt for equity exchanges
STOCKHOLDERS' EQUITY
Aggregate Principal Repurchased/Exchanged	$ 9.6		$ 9.6
Reacquisition Cost			$ 8.1
Shares of Common Stock Exchanged			432,777
Gain on Extinguishment			$ 1.3
Accrued Interest Paid/Exchanged			$ 0.2
Stated interest rate (as a percent)	5.875%		5.875%