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GOODWILL AND OTHER INTANGIBLE ASSETS AND LIABILITIES (Schedule Of Finite-Lived Intangible Assets By Major Class) (Details) - USD ($) $ in Millions | Mar. 31, 2016 | Dec. 31, 2015
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Finite-Lived Intangible Assets [Line Items] |  |
Definite lived intangible assets - Gross Carrying Amount | $ 78.7 | $ 78.4
Definite lived intangible assets - Accumulated Amortization | (21.6) | (20.2)
Definite lived intangible assets - Net Carrying Amount | 57.1 | 58.2
Permits [Member] | Other Assets [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Definite lived intangible assets - Gross Carrying Amount | 78.7 | 78.4
Definite lived intangible assets - Accumulated Amortization | (21.6) | (20.2)
Definite lived intangible assets - Net Carrying Amount | 57.1 | 58.2
Below Market Sales Contracts [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Below Market Lease, Gross | (228.9) | (228.9)
Below Market Lease, Accumulated Amortization | 205.8 | 205.8
Below Market Lease, Net | (23.1) | (23.1)
Below Market Sales Contracts [Member] | Other Current Liabilities [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Below Market Lease, Gross | (23.1) | (23.1)
Below Market Lease, Net | (23.1) | (23.1)
Below Market Sales Contracts [Member] | Other Liabilities [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Below Market Lease, Gross | (205.8) | (205.8)
Below Market Lease, Accumulated Amortization | 205.8 | $ 205.8
Below Market Lease, Net | $ 0.0 |

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