AG真人平台AG真人试玩

Quarterly report pursuant to Section 13 or 15(d)

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Equity Method Investments (Details)

v3.20.2
BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Equity Method Investments (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Mar. 13, 2020
Combined Metals of Chicago, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage 40.00%
Hibbing Taconite Company [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage 23.00%
Spartan AG真人平台AG真人试玩 Coating, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity $ 32.5
Equity Method Investment, Ownership Percentage 48.00%