SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash paid during period for:
Interest	$ 221,500,000	$ 196,700,000	$ 194,500,000
Income taxes, net of refunds	206,800,000	474,900,000	964,700,000
Disclosure of non-cash financing and investing activities
Change in accrued property, plant and equipment	$ 13,200,000		$ 11,300,000
Decrease in capital expenditures incurred but not paid		$ (5,600,000)