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Quarterly report pursuant to Section 13 or 15(d)

GOODWILL AND INTANGIBLE ASSETS AND LIABILITIES - Intangible Assets and Liabilities (Details)

v3.20.2
GOODWILL AND INTANGIBLE ASSETS AND LIABILITIES - Intangible Assets and Liabilities (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items] Ìý Ìý
Finite-Lived Intangible Assets, Gross $ 220.2 Ìý
Finite-Lived Intangible Assets, Accumulated Amortization (27.6) Ìý
Finite-Lived Intangible Assets, Net 192.6 Ìý
Finite-Lived Intangible Liabilities, Gross (75.0) Ìý
Finite-Lived Intangible Liabilities, Accumulated Amortization 2.7 Ìý
Finite-Lived Intangible Liabilities, Net (72.3) Ìý
Customer Relationships [Member] Ìý Ìý
Finite-Lived Intangible Assets [Line Items] Ìý Ìý
Finite-Lived Intangible Assets, Gross 77.0 Ìý
Finite-Lived Intangible Assets, Accumulated Amortization (1.5) Ìý
Finite-Lived Intangible Assets, Net 75.5 Ìý
Technology-Based Intangible Assets [Member] Ìý Ìý
Finite-Lived Intangible Assets [Line Items] Ìý Ìý
Finite-Lived Intangible Assets, Gross 60.0 Ìý
Finite-Lived Intangible Assets, Accumulated Amortization (1.2) Ìý
Finite-Lived Intangible Assets, Net 58.8 Ìý
Trademarks and Trade Names [Member] Ìý Ìý
Finite-Lived Intangible Assets [Line Items] Ìý Ìý
Finite-Lived Intangible Assets, Gross 11.0 Ìý
Finite-Lived Intangible Assets, Accumulated Amortization (0.4) Ìý
Finite-Lived Intangible Assets, Net 10.6 Ìý
Mining Permits [Member] Ìý Ìý
Finite-Lived Intangible Assets [Line Items] Ìý Ìý
Finite-Lived Intangible Assets, Gross 72.2 $ 72.2
Finite-Lived Intangible Assets, Accumulated Amortization (24.5) (24.1)
Finite-Lived Intangible Assets, Net $ 47.7 $ 48.1