SUPPLEMENTAL CASH FLOW INFORMATION (Supplemental Information Referable to Condensed Consolidated Statements of Cash Flows) (Details) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021
SUPPLEMENTAL CASH FLOW INFORMATION [Abstract]
Interest (exclusive of amount capitalized)		$ 96.6	$ 81.5
Income taxes		133.7	122.1
Accrued liabilities for purchases of property, plant & equipment		37.5	27.5
Recognition of new and revised asset retirement obligations	[1]	0.6	15.7
Recognition of new and revised lease obligations for: Operating leases	[1]	35.5	77.8
Recognition of new and revised lease obligations for: Finance leases	[1]	3.5	9.8
Amounts referable to business acquisitions, Operating lease ROU assets		1.7	194.8
Amounts referable to business acquisitions, Finance lease ROU assets		0.0	108.0
Amounts referable to business acquisitions, Other liabilities assumed		43.5	687.6
Amounts referable to business acquisitions, Consideration payable to seller		$ 65.4	$ 0.0

[1] Excludes amounts acquired in business acquisitions