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GOODWILL AND OTHER INTANGIBLE ASSETS AND LIABILITIES (Tables) | 6 Months Ended
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Jun. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule Of Finite-Lived Intangible Assets By Major Class | The following table is a summary of intangible assets and liabilities as of June 30, 2016 and December 31, 2015:
|  |  | (In Millions)
|  |  | June 30, 2016 |  | December 31, 2015
| Classification |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Definite-lived intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |
Permits | Other non-current assets |  | $ | 78.6 |  |  | $ | (22.8 | ) |  | $ | 55.8 |  |  | $ | 78.4 |  |  | $ | (20.2 | ) |  | $ | 58.2 |
Total intangible assets |  |  | $ | 78.6 |  |  | $ | (22.8 | ) |  | $ | 55.8 |  |  | $ | 78.4 |  |  | $ | (20.2 | ) |  | $ | 58.2 |
Below-market sales contracts | Other current liabilities |  | $ | (23.1 | ) |  | $ | 7.7 |  |  | $ | (15.4 | ) |  | $ | (23.1 | ) |  | $ | — |  |  | $ | (23.1 | )
Below-market sales contracts | Other liabilities |  | (205.8 | ) |  | 205.8 |  |  | — |  |  | (205.8 | ) |  | 205.8 |  |  | — |
Total below-market sales contracts |  |  | $ | (228.9 | ) |  | $ | 213.5 |  |  | $ | (15.4 | ) |  | $ | (228.9 | ) |  | $ | 205.8 |  |  | $ | (23.1 | )
Estimated Amortization Expense Relating To Intangible Assets | The estimated amortization expense relating to intangible assets for the remainder of this year and each of the five succeeding years is as follows:
| (In Millions)
| Amount
Year Ending December 31, |
2016 (remaining six months) | $ | 1.8 |
2017 | 4.2 |
2018 | 4.2 |
2019 | 2.5 |
2020 | 2.5 |
2021 | 2.5 |
Total | $ | 17.7 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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