SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract]
Cash paid for interest, net of amount capitalized	$ 67.8	$ 63.2	$ 62.4
Cash paid (received) for income taxes, net	25.9	(55.2)	(16.9)
Accounts payable related to construction costs	30.3	15.5	23.7
Increase in receivable related to insurance proceeds	0.0	4.3	0.0
Liabilities accrued for software licensing agreement	$ 1.5	$ 0.0	$ 0.0