SUPPLEMENTAL CASH FLOW INFORMATION - SUPPLEMENTAL INFORMATION (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Supplemental cash flow information
Cash paid for interest, net of amount capitalized	$ 312.8	$ 234.9
Cash paid for income taxes, net	15.8	37.3
Significant non-cash investing and financing transactions:
Accounts payable related to construction costs	156.7	210.2
Increase in receivables related to insurance proceeds	5.6	0.0
Liabilities accrued for software licensing agreement	$ 0.0	$ 7.4