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INVENTORIES (Tables)
12 Months Ended
Dec. 31, 2021
INVENTORIES [Abstract]  
Inventories in millions2021 2020 Inventories Finished products 1$          418.0  $        378.4  Raw materials 59.9  33.8  Products in process 4.2  4.5  Operating supplies and other 39.2  31.9  Total$          521.3  $        448.6  1Includes inventories encumbered by volumetric production payments (see Note 2), as follows: December 31, 2021 — $2.8 million and December 31, 2020 — $2.4 million.