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Quarterly report pursuant to Section 13 or 15(d)

GOODWILL AND OTHER INTANGIBLE ASSETS AND LIABILITIES (Schedule Of Finite-Lived Intangible Assets By Major Class) (Details)

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GOODWILL AND OTHER INTANGIBLE ASSETS AND LIABILITIES (Schedule Of Finite-Lived Intangible Assets By Major Class) (Details) - USD ($)
$ in Millions
Sep. 30, 2015
Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items] Ìý Ìý
Definite lived intangible assets - Gross Carrying Amount $ 78.2 $ 79.2
Definite lived intangible assets - Accumulated Amortization (19.3) (16.5)
Definite lived intangible assets - Net Carrying Amount 58.9 62.7
Permits [Member] | Other Assets [Member] Ìý Ìý
Finite-Lived Intangible Assets [Line Items] Ìý Ìý
Definite lived intangible assets - Gross Carrying Amount 78.2 79.2
Definite lived intangible assets - Accumulated Amortization (19.3) (16.5)
Definite lived intangible assets - Net Carrying Amount 58.9 62.7
Below Market Sales Contracts [Member] Ìý Ìý
Finite-Lived Intangible Assets [Line Items] Ìý Ìý
Definite lived intangible assets - Gross Carrying Amount (228.9) (228.9)
Definite lived intangible assets - Accumulated Amortization 198.1 182.8
Definite lived intangible assets - Net Carrying Amount (30.8) (46.1)
Below Market Sales Contracts [Member] | Other Current Liabilities [Member] Ìý Ìý
Finite-Lived Intangible Assets [Line Items] Ìý Ìý
Definite lived intangible assets - Gross Carrying Amount (23.0) (23.0)
Definite lived intangible assets - Net Carrying Amount (23.0) (23.0)
Below Market Sales Contracts [Member] | Other Liabilities [Member] Ìý Ìý
Finite-Lived Intangible Assets [Line Items] Ìý Ìý
Definite lived intangible assets - Gross Carrying Amount (205.9) (205.9)
Definite lived intangible assets - Accumulated Amortization 198.1 182.8
Definite lived intangible assets - Net Carrying Amount $ (7.8) $ (23.1)