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
Mar. 31, 2016
Dec. 31, 2015
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