Annual report pursuant to Section 13 and 15(d)

Goodwill And Other Intangible Assets And Liabilities (Schedule Of Finite-Lived Intangible Assets by Major Class) (Details)

v2.4.0.6
Goodwill And Other Intangible Assets And Liabilities (Schedule Of Finite-Lived Intangible Assets by Major Class) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Finite-Lived Intangible Assets [Line Items]    
Definite lived intangible assets - Gross Carrying Amount $ 194.5 $ 208.0
Definite lived intangible assets - Accumulated Amortization (47.5) (32.2)
Definite lived intangible assets - Net Carrying Amount 147.0 175.8
Below-market sales contracts - Gross Carrying Amount (329.3) (329.3)
Below-market sales contracts - Accumulated Amortization 164.8 107.8
Below-market sales contracts - Net Carrying Amount (164.5) (221.5)
Permits [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Classification of intangible assets and liabilities Intangible assets, net  
Definite lived intangible assets - Gross Carrying Amount 134.3 132.4
Definite lived intangible assets - Accumulated Amortization (23.2) (16.3)
Definite lived intangible assets - Net Carrying Amount 111.1 116.1
Utility Contracts [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Classification of intangible assets and liabilities Intangible assets, net  
Definite lived intangible assets - Gross Carrying Amount 54.7 54.7
Definite lived intangible assets - Accumulated Amortization (21.3) (10.2)
Definite lived intangible assets - Net Carrying Amount 33.4 44.5
Easements [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Classification of intangible assets and liabilities Intangible assets, net [1]  
Definite lived intangible assets - Gross Carrying Amount   11.7 [1]
Definite lived intangible assets - Accumulated Amortization   (0.4) [1]
Definite lived intangible assets - Net Carrying Amount   11.3 [1]
Lease Agreements [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Classification of intangible assets and liabilities Intangible assets, net  
Definite lived intangible assets - Gross Carrying Amount 5.5 5.2
Definite lived intangible assets - Accumulated Amortization (3.0) (2.9)
Definite lived intangible assets - Net Carrying Amount 2.5 2.3
Unpatented Technology [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Classification of intangible assets and liabilities Intangible assets, net [2]  
Definite lived intangible assets - Gross Carrying Amount   4.0 [2]
Definite lived intangible assets - Accumulated Amortization   (2.4) [2]
Definite lived intangible assets - Net Carrying Amount   1.6 [2]
Below-Market Sales Contracts [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Classification of intangible assets and liabilities Below-market sales contracts  
Below-market sales contracts - Gross Carrying Amount (252.3) (252.3)
Below-market sales contracts - Accumulated Amortization 140.5 87.9
Below-market sales contracts - Net Carrying Amount (111.8) (164.4)
Below-Market Sales Contracts Current [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Classification of intangible assets and liabilities Below-market sales contracts - current  
Below-market sales contracts - Gross Carrying Amount (77.0) (77.0)
Below-market sales contracts - Accumulated Amortization 24.3 19.9
Below-market sales contracts - Net Carrying Amount $ (52.7) $ (57.1)
[1] Upon the acquistion of Consolidated Thompson, this intangible asset is now eliminated through intercompany eliminations. The easement agreement is between Wabush and Consolidated Thompson.
[2] Upon recording the renewaFUEL operations as discontinued operations, this intangible asset was written down in the resulting impairment charge recorded during the third quarter of 2011.