INCOME TAXES (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Loss Carryforwards [Line Items]
Total income tax expense		$ 299.4	$ 193.0	$ 200.1
State net operating loss carryforwards		79.6	86.3
Interest and penalties recognized as income tax expense (benefit)		1.5	0.8	0.2
Balance of accrued interest and penalties included in liability for unrecognized income tax benefits		3.3	1.8	0.8
Unrecognized income tax benefits that would affect the effective tax rate if recognized		$ 19.8	17.6	10.3
Income tax benefit recognition threshold more likely than not		50.00%
Increase in valuation allowance		$ 10.3	14.5	$ 13.7
Valuation allowance		89.5	76.8
Other Accounts And Notes Receivable [Member]
Operating Loss Carryforwards [Line Items]
Income tax receivables		1.3	1.3
Other Current Assets [Member]
Operating Loss Carryforwards [Line Items]
Income tax receivables		0.2	$ 0.4
Alabama [Member]
Operating Loss Carryforwards [Line Items]
State net operating loss carryforwards		76.1
Increase in valuation allowance	$ 13.7
Alabama [Member] | State [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards, valuation allowance		$ 54.3
Alabama [Member] | State [Member] | Earliest Tax Year [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards expiration year		2024
Alabama [Member] | State [Member] | Latest Tax Year [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards expiration year		2029
Quintana Roo, Mexico [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards		$ 27.4
Net operating loss carryforwards, valuation allowance		27.4
Increase in valuation allowance		12.9
Quintana Roo, Mexico [Member] | Expire Between 2032 And 2033 [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards		$ 24.6