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GOODWILL AND OTHER INTANGIBLE ASSETS AND LIABILITIES | 9 Months Ended
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Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
GOODWILL AND OTHER INTANGIBLE ASSETS AND LIABILITIES | NOTE 14 - GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill The carrying amount of goodwill as of September 30, 2018 and December 31, 2017 was $2.0 million and related to our U.S. Iron Ore operating segment. Other Intangible Assets The following table is a summary of definite-lived intangible assets:
|  |  | (In Millions)
|  |  | September 30, 2018 |  | December 31, 2017
| Classification |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Permits | Other non-current assets |  | $ | 72.2 |  |  | $ | (23.1 | ) |  | $ | 49.1 |  |  | $ | 72.2 |  |  | $ | (22.5 | ) |  | $ | 49.7 |
Amortization expense relating to other intangible assets was $0.2 million and $0.6 million for the three and nine months ended September 30, 2018 and 2017, respectively, and is recognized in Cost of goods sold and operating expenses in the Statements of Unaudited Condensed Consolidated Operations. Amortization expense of other intangible assets is expected to continue to be immaterial going forward.

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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