Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Other Intangible Assets and Liabilities (Summary of Intangible Assets and Liabilities) (Details)

 v2.3.0.11
Goodwill and Other Intangible Assets and Liabilities (Summary of Intangible Assets and Liabilities) (Details) (USD $)
In Millions
Jun. 30, 2011
Dec. 31, 2010
Definite lived intangible assets - Gross Carrying Amount $ 201.3 $ 208.0
Definite lived intangible assets - Accumulated Amortization (41.8) (32.2)
Definite lived intangible assets - Net Carrying Amount 159.5 175.8
Below-market sales contracts - Gross Carrying Amount (329.3) (329.3)
Below-market sales contracts - Accumulated Amortization 131.5 107.8
Below-market sales contracts - Net Carrying Amount (197.8) (221.5)
Noncurrent Liabilities [Member]
    
Below-market sales contracts - Gross Carrying Amount (252.3) (252.3)
Below-market sales contracts - Accumulated Amortization 107.2 87.9
Below-market sales contracts - Net Carrying Amount (145.1) (164.4)
Other Current Liabilities [Member]
    
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)
Utility Contracts [Member]
    
Definite lived intangible assets - Gross Carrying Amount 54.7 54.7
Definite lived intangible assets - Accumulated Amortization (15.8) (10.2)
Definite lived intangible assets - Net Carrying Amount 38.9 44.5
Easements [Member]
    
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]
    
Definite lived intangible assets - Gross Carrying Amount 5.5 5.2
Definite lived intangible assets - Accumulated Amortization (2.9) (2.9)
Definite lived intangible assets - Net Carrying Amount 2.6 2.3
Unpatented Technology [Member]
    
Definite lived intangible assets - Gross Carrying Amount 4.0 4.0
Definite lived intangible assets - Accumulated Amortization (2.8) (2.4)
Definite lived intangible assets - Net Carrying Amount 1.2 1.6
Permits [Member]
    
Definite lived intangible assets - Gross Carrying Amount 137.1 132.4
Definite lived intangible assets - Accumulated Amortization (20.3) (16.3)
Definite lived intangible assets - Net Carrying Amount $ 116.8 $ 116.1
[1] Upon the acquisition of Consolidated Thompson, this intangible asset is now eliminated through intercompany eliminations. The easement agreement is between Wabush and Consolidated Thompson.