SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2024	Jun. 30, 2023
Supplemental Cash Flow Information [Abstract]
Cash paid for interest, net of amount capitalized	$ 47.0	$ 43.4
Cash paid for income taxes, net	2.1	4.3
Cash received from sale of production tax credits	14.5
Significant non-cash investing and financing transactions
Accounts payable related to construction costs	$ 30.0	$ 26.2

Future cash outflow to pay for purchases of fixed assets that have occurred.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 230
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Cash received during the period from the sale of production tax credits to third parties.

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