SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash paid during period for:
Interest	$ 194,700,000	$ 216,600,000	$ 248,900,000
Income taxes, net of refunds	1,000,000,000	500,000,000.0	216,800,000
Disclosure of non-cash financing and investing activities
Conversion of zero-coupon convertible debt	0	0	8,400,000
Assets acquired under finance leases	0	0	48,700,000
Change in accrued property, plant and equipment	11,800,000	1,200,000	2,700,000
Floating rate secured note receivable due 2022 from the sale of CRP	$ 0	$ 0	$ 110,000,000.0