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Quarterly report pursuant to Section 13 or 15(d)

DISCONTINUED OPERATIONS (Narrative) (Details)

v3.10.0.1
DISCONTINUED OPERATIONS (Narrative) (Details)
$ in Millions, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2018
USD ($)
Jun. 30, 2018
USD ($)
Mar. 31, 2018
USD ($)
Sep. 30, 2017
USD ($)
Jun. 30, 2017
USD ($)
Mar. 31, 2017
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2018
CAD ($)
Sep. 30, 2017
USD ($)
Jan. 01, 2018
USD ($)
Dec. 31, 2017
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Loans to and accounts receivable from the Canadian Entities $ 0.0 Ìý Ìý Ìý Ìý Ìý $ 0.0 Ìý Ìý $ 51.6 $ 51.6
Cash contribution Ìý Ìý Ìý Ìý Ìý Ìý Ìý $ 19.0 Ìý Ìý Ìý
Asia Pacific Iron Ore [Member] Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Income tax expense 0.0 Ìý Ìý $ (0.4) Ìý Ìý 0.0 Ìý $ 0.4 Ìý Ìý
Unrealized Net Gain (Loss) on Foreign Currency Translation [Member] Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax $ (228.1) $ 0.0 $ 0.0 $ 0.0 $ 0.0 $ 0.0 Ìý Ìý Ìý Ìý Ìý
Discontinued Operations [Member] | Asia Pacific Iron Ore [Member] Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Non-cash financing activities Ìý Ìý Ìý Ìý Ìý Ìý $ 27.1 Ìý Ìý Ìý Ìý