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RELATED PARTIES (Narrative) (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2002
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|
| Segment Reporting Information [Line Items] | Ìý | Ìý | Ìý |
| Due from Related Parties, Current | $ 132.0 | $ 149.8 | Ìý |
| Due to Related Parties, Current | 25.1 | 20.2 | Ìý |
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U.S. Iron Ore [Member]
|
Ìý | Ìý | Ìý |
| Segment Reporting Information [Line Items] | Ìý | Ìý | Ìý |
| Number Of Mines | 5 | Ìý | Ìý |
|
Eastern Canadian Iron Ore [Member]
|
Ìý | Ìý | Ìý |
| Segment Reporting Information [Line Items] | Ìý | Ìý | Ìý |
| Number Of Mines | 2 | Ìý | Ìý |
|
Joint Venture Partners [Member] | U.S. Iron Ore [Member]
|
Ìý | Ìý | Ìý |
| Segment Reporting Information [Line Items] | Ìý | Ìý | Ìý |
| Number Of Mines | 3 | Ìý | Ìý |
|
Joint Venture Partners [Member] | Eastern Canadian Iron Ore [Member]
|
Ìý | Ìý | Ìý |
| Segment Reporting Information [Line Items] | Ìý | Ìý | Ìý |
| Number Of Mines | 1 | Ìý | Ìý |
|
Empire [Member]
|
Ìý | Ìý | Ìý |
| Segment Reporting Information [Line Items] | Ìý | Ìý | Ìý |
| Accounts, Notes, Loans and Financing Receivable, Net, Noncurrent | 11.3 | 19.3 | 120.0 |
| Loans Receivable, Fair Value Disclosure | $ 11.9 | $ 21.3 | Ìý |
| Fair Value Assumptions, Risk Free Interest Rate | 1.28% | 2.85% | Ìý |
|
Prior [Member] | Empire [Member]
|
Ìý | Ìý | Ìý |
| Segment Reporting Information [Line Items] | Ìý | Ìý | Ìý |
| Ownership interest, equity method investment | Ìý | Ìý | 46.70% |
| X | ||||||||||
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- Definition
Number of mines No definition available.
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| X | ||||||||||
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- Definition
The aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due within one year (or one business cycle). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Risk-free interest rate assumption used in valuing an instrument. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The aggregate of amounts due from customers or clients more than one year from the balance sheet date, for goods or services that have been delivered or sold in the normal course of business and an amount representing an agreement for an unconditional promise by the maker to pay the Company (holder) a definite sum of money at a future date more than one year from the balance sheet date, reduced to their estimated net realizable fair value by an allowance established by the Company of the amount it deems uncertain of collection and net of any write-downs taken for collection uncertainty on the part of the holder, respectively. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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