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DEBT (Details 1) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Debt Instrument [Line Items]
Receivables Financing Agreement Outstanding Balance	$ 298.8	$ 328.5	$ 234.8
Supplier Finance Program, Obligation	0.0	0.0	0.2
Debt Issuance Costs, Noncurrent, Net	(14.8)	(16.6)	(18.2)
Debt Instrument, Unamortized Discount	(0.1)	(0.2)	(0.2)
Debt, Long-Term and Short-Term, Combined Amount	2,910.9	2,670.1	2,726.3
Increase (Decrease) in Notes Receivable, Current	121.8	78.8	9.0
Long-Term Debt	2,789.1	2,591.3	2,717.3
Variable-rate Term Loan [Member]
Debt Instrument [Line Items]
Notes Payable	336.9	341.3	345.6
Variable-rate Senior Revolving Facility
Debt Instrument [Line Items]
Notes Payable	411.0	68.0	215.0
Variable-rate Recovery Zone bonds
Debt Instrument [Line Items]
Notes Payable	83.0	103.0	103.0
Variable-rate Go Zone bonds
Debt Instrument [Line Items]
Notes Payable	0.0	50.0	50.0
Variable-rate industrial and environmental obligations
Debt Instrument [Line Items]
Notes Payable	2.9	2.9	2.9
9.5% senior note
Debt Instrument [Line Items]
Notes Payable	$ 108.6	$ 108.6	$ 108.6
Debt Instrument, Interest Rate, Stated Percentage	9.50%	9.50%	9.50%
5.625% senior note
Debt Instrument [Line Items]
Notes Payable	$ 669.3	$ 669.3	$ 669.3
Debt Instrument, Interest Rate, Stated Percentage	5.625%	5.625%	5.625%
5.125% senior note
Debt Instrument [Line Items]
Notes Payable	$ 500.0	$ 500.0	$ 500.0
Debt Instrument, Interest Rate, Stated Percentage	5.125%	5.125%	5.125%
5.00% senior note
Debt Instrument [Line Items]
Notes Payable	$ 515.3	$ 515.3	$ 515.3
Debt Instrument, Interest Rate, Stated Percentage	5.00%	5.00%	5.00%

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