ENVIRONMENTAL AND MINE CLOSURE OBLIGATIONS (Narrative) (Details) $ in Millions |
12 Months Ended | |
---|---|---|
Dec. 31, 2016
USD ($)
T
|
Mar. 31, 2017
USD ($)
|
|
Accrual for Environmental Loss Contingencies, Period Increase (Decrease) | $ 9.2 | Ìý |
Reserve increase (decrease), tons | T | 115,000,000 | Ìý |
Selenium [Domain] | Ìý | Ìý |
Accrual for Environmental Loss Contingencies, Period Increase (Decrease) | $ (29.6) | Ìý |
Eastern Canadian Iron Ore [Member] | Owned Or Operating Facilities [Member] | Ìý | Ìý |
Mine Reclamation and Closing Liability, current and noncurrent | $ 206.8 | $ 211.0 |
X | ||||||||||
- Definition Mine Reclamation and Closing Liability, current and noncurrent No definition available.
|
X | ||||||||||
- Definition Reserve increase (decrease), tons No definition available.
|
X | ||||||||||
- Definition Increase (decrease) in the accrual for environmental loss contingencies during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Details
|
X | ||||||||||
- Details
|
X | ||||||||||
- Details
|