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RELATED PARTIES (Summary Of Related Party Transactions Table Disclosure) (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | |
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Mar. 31, 2015
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Mar. 31, 2014
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| Related Party Transactions [Abstract] | Ìý | Ìý |
| Product revenues from related parties | $ 110.4us-gaap_RevenueFromRelatedParties | $ 134.4us-gaap_RevenueFromRelatedParties |
| Product | $ 399.5us-gaap_SalesRevenueGoodsNet | $ 559.2us-gaap_SalesRevenueGoodsNet |
| Related party product revenue as a percent of total product revenue | 27.60%clf_PercentageOfRelatedPartyRevenue | 24.00%clf_PercentageOfRelatedPartyRevenue |
| X | ||||||||||
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- Definition
Related party product revenue as a percentage of total product revenue. No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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