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Quarterly report pursuant to Section 13 or 15(d)

SEGMENT REPORTING - Segment Capital Additions (Details)

v3.20.2
SEGMENT REPORTING - Segment Capital Additions (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Segment Reporting Information [Line Items] Ìý Ìý Ìý Ìý
Property, Plant and Equipment, Additions $ 73.0 $ 191.6 $ 230.7 $ 320.9
Steel and Manufacturing [Member] Ìý Ìý Ìý Ìý
Segment Reporting Information [Line Items] Ìý Ìý Ìý Ìý
Property, Plant and Equipment, Additions 55.6 155.1 178.8 237.5
Mining and Pelletizing [Member] Ìý Ìý Ìý Ìý
Segment Reporting Information [Line Items] Ìý Ìý Ìý Ìý
Property, Plant and Equipment, Additions 17.4 35.6 51.6 82.4
Corporate and Other [Member] Ìý Ìý Ìý Ìý
Segment Reporting Information [Line Items] Ìý Ìý Ìý Ìý
Property, Plant and Equipment, Additions $ 0.0 $ 0.9 $ 0.3 $ 1.0