GOODWILL AND OTHER INTANGIBLE ASSETS AND LIABILITIES (Schedule Of Finite-Lived Intangible Assets By Major Class) (Details) - Permits [Member] - Other Assets [Member] - USD ($) $ in Millions |
Mar. 31, 2018 |
Dec. 31, 2017 |
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Finite-Lived Intangible Assets [Line Items] | Ìý | Ìý |
Definite lived intangible assets - Gross Carrying Amount | $ 78.8 | $ 78.8 |
Definite lived intangible assets - Accumulated Amortization | (28.9) | (26.5) |
Definite lived intangible assets - Net Carrying Amount | $ 49.9 | $ 52.3 |
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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