INVENTORIES (Inventories) (Details) - USD ($) $ in Millions		Dec. 31, 2022	Dec. 31, 2021
INVENTORIES [Abstract]
Finished products	[1]	$ 439.3	$ 418.0
Raw materials		63.4	59.9
Products in process		6.0	4.2
Operating supplies and other		70.6	39.2
Inventories		579.3	521.3
Encumbered inventories		$ 3.6	$ 2.8

[1] Includes inventories encumbered by volumetric production payments (see Note 2), as follows: December 31, 2022 — $3.6 million; December 31, 2021 — $2.8 million.