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Quarterly report pursuant to Section 13 or 15(d)

GOODWILL AND INTANGIBLE ASSETS AND LIABILITIES - Goodwill (Details)

v3.20.2
GOODWILL AND INTANGIBLE ASSETS AND LIABILITIES - Goodwill (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Goodwill [Line Items] Ìý Ìý
Goodwill $ 139.3 $ 2.1
Steel and Manufacturing [Member] Ìý Ìý
Goodwill [Line Items] Ìý Ìý
Goodwill 137.2 Ìý
Mining and Pelletizing [Member] Ìý Ìý
Goodwill [Line Items] Ìý Ìý
Goodwill $ 2.1 $ 2.1