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)

v2.4.0.8
GOODWILL AND OTHER INTANGIBLE ASSETS AND LIABILITIES (Schedule Of Finite-Lived Intangible Assets By Major Class) (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]    
Definite lived intangible assets - Gross Carrying Amount $ 186.4 $ 184.5
Definite lived intangible assets - Accumulated Amortization (92.6) (89.1)
Definite lived intangible assets - Net Carrying Amount 93.8 95.4
Permits [Member] | Intangible Assets, Net [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Definite lived intangible assets - Gross Carrying Amount 129.3 127.4
Definite lived intangible assets - Accumulated Amortization (38.9) (35.9)
Definite lived intangible assets - Net Carrying Amount 90.4 91.5
Utility Contracts [Member] | Intangible Assets, Net [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Definite lived intangible assets - Gross Carrying Amount 54.7 54.7
Definite lived intangible assets - Accumulated Amortization (53.5) (53.1)
Definite lived intangible assets - Net Carrying Amount 1.2 1.6
Leases [Member] | Intangible Assets, Net [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Definite lived intangible assets - Gross Carrying Amount 2.4 2.4
Definite lived intangible assets - Accumulated Amortization (0.2) (0.1)
Definite lived intangible assets - Net Carrying Amount 2.2 2.3
Below Market Sales Contracts [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Definite lived intangible assets - Gross Carrying Amount (228.9) (228.9)
Definite lived intangible assets - Accumulated Amortization 159.7 159.7
Definite lived intangible assets - Net Carrying Amount (69.2) (69.2)
Below Market Sales Contracts [Member] | Other Current Liabilities [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Definite lived intangible assets - Gross Carrying Amount (23.0) (23.0)
Definite lived intangible assets - Accumulated Amortization      
Definite lived intangible assets - Net Carrying Amount (23.0) (23.0)
Below Market Sales Contracts [Member] | Other Liabilities [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Definite lived intangible assets - Gross Carrying Amount (205.9) (205.9)
Definite lived intangible assets - Accumulated Amortization 159.7 159.7
Definite lived intangible assets - Net Carrying Amount $ (46.2) $ (46.2)