BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Tables) |
12 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2015 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Estimated Useful Lives Of Intangible Assets Subject To Periodic Amortization On Straight Line Basis Table [Text Block] |
Other intangible assets are subject to periodic amortization on a straight-line basis over their estimated useful lives as follows:
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule Of Subsidiaries |
The consolidated financial statements include our accounts and the accounts of our wholly owned and majority-owned subsidiaries, including the following operations at December 31, 2015:
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Depreciation Disclosure [Table Text Block] |
Depreciation is provided over the following estimated useful lives:
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Equity Method Investments |
The following table presents the detail of our investments in unconsolidated ventures and where those investments are classified in the Statements of Consolidated Financial Position as of December听31, 2015 and December听31, 2014. Parentheses indicate a net liability.
听听听听听听听听听听听听听听听听听听听听听听听听听听听听听听听听听听听听听听听听听
(1)听听听听At December 31, 2014, the classification for Hibbing was Other non-current assets.
(2)听听听听At December 31, 2015, no Other equity method investments remain.
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Reimbursements Revenue Disclosure [Table Text Block] |
The following table is a summary of reimbursements in our U.S. Iron Ore operations for the years ended December听31, 2015, 2014 and 2013:
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| X | ||||||||||
- Definition Describes the methodology and periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment and the estimated useful life of the asset in a systematic and rational manner.) No definition available.
|
| X | ||||||||||
- Definition Estimated Useful Lives of Intangible Assets Subject to Periodic Amortization on a Straight-Line Basis [Table Text Block] No definition available.
|
| X | ||||||||||
- Definition Reimbursements Revenue Disclosure No definition available.
|
| X | ||||||||||
- Definition Disclosure of subsidiaries or other investments that are consolidated. No definition available.
|
| X | ||||||||||
- Definition Tabular disclosure of equity method investments including, but not limited to, name of each investee or group of investments, percentage ownership, difference between recorded amount of an investment and the value of the underlying equity in the net assets, and summarized financial information. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|