Quarterly report pursuant to Section 13 or 15(d)

Acquisitions and Other Investments (Narrative) (Details)

 v2.3.0.11
Acquisitions and Other Investments (Narrative) (Details)
In Millions, except Per Share data, unless otherwise specified
 3 Months Ended 6 Months Ended 3 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 3 Months Ended 0 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2011
USD ($)
MT
Jun. 30, 2010
USD ($)
Jun. 30, 2011
USD ($)
MT
Jun. 30, 2010
USD ($)
Dec. 31, 2010
USD ($)
Dec. 31, 2009
Mar. 31, 2010
Upper Limit [Member]
Wabush [Member]
T
Jun. 30, 2010
CLCC [Member]
Lower Limit [Member]
Metallurgical Coal [Member]
T
Mar. 31, 2010
Lower Limit [Member]
Wabush [Member]
T
Dec. 31, 2010
CLCC [Member]
North American Coal [Member]
USD ($)
Jun. 30, 2011
Consolidated Thompson [Member]
Eastern Canadian Iron Ore [Member]
USD ($)
Dec. 31, 2010
CLCC [Member]
Construction Permits [Member]
USD ($)
Dec. 31, 2010
CLCC [Member]
Lease Agreements [Member]
USD ($)
Dec. 31, 2010
CLCC [Member]
Scenario, Adjustment [Member]
USD ($)
Sep. 30, 2010
Scenario, Adjustment [Member]
Wabush [Member]
USD ($)
Dec. 31, 2010
Scenario, Adjustment [Member]
Wabush [Member]
USD ($)
Dec. 31, 2010
CLCC [Member]
Scenario, Change [Member]
USD ($)
Mar. 31, 2010
CLCC [Member]
Scenario, Previously Reported [Member]
USD ($)
Mar. 31, 2010
Scenario, Previously Reported [Member]
Freewest [Member]
USD ($)
Mar. 31, 2010
Scenario, Previously Reported [Member]
Wabush [Member]
USD ($)
Mar. 31, 2011
CLCC [Member]
Sep. 30, 2010
CLCC [Member]
Dec. 31, 2010
CLCC [Member]
USD ($)
Jun. 30, 2010
CLCC [Member]
Metallurgical Coal [Member]
T
Jun. 30, 2010
CLCC [Member]
Thermal Coal [Member]
T
Mar. 31, 2010
Freewest [Member]
USD ($)
T
Jan. 27, 2011
Freewest [Member]
Mar. 31, 2010
Freewest [Member]
CAD
Dec. 31, 2009
Freewest [Member]
USD ($)
Mar. 31, 2010
Wabush [Member]
T
Feb. 01, 2010
Wabush [Member]
Jan. 11, 2011
Consolidated Thompson [Member]
CAD
Jun. 30, 2011
Consolidated Thompson [Member]
USD ($)
Jun. 30, 2011
Consolidated Thompson [Member]
USD ($)
May 12, 2011
Consolidated Thompson [Member]
CAD
Business Acquisition, Percentage of Voting Interests Acquired                                                     100.00%       100.00%   100.00% 100.00%  
Aggregate acquisition consideration                           $ 775.9   $ 103.0 $ (1.4) $ 774.5         $ 775.9                   $ 4,554.0 $ 4,554.0  
Cash portion of acquisition consideration                           757.0   88.0   757.0 12.8       757.0                   4,554.0 4,554.0  
Working capital adjustment as part of acquisition consideration                           18.9   15.0 (1.4) 17.5         18.9                        
Production capacity and reserve effects and rationale for acquisition                                        

CLCC is a producer of high-volatile metallurgical and thermal coal located in southern West Virginia. CLCC's operations include two underground continuous mining method metallurgical coal mines and one open surface thermal coal mine. The acquisition includes a metallurgical and thermal coal mining complex with a coal preparation and processing facility as well as a large, long-life reserve base with an estimated 59 million tons of metallurgical coal and 62 million tons of thermal coal. This reserve base increases our total global reserve base to over 166 million tons of metallurgical coal and over 67 million tons of thermal coal. This acquisition represents an opportunity for us to add complementary high-quality coal products and provides certain advantages, including among other things, long-life mine assets, operational flexibility, and new equipment.

                           
Ownership interest before acquisition                                                         12.40% 26.80%          
Fair value of equity interest before acquisition                               38.0       39.7                 27.4            
Gain on remeasurement of equity interest before acquisition       38.6                       25.0       47.0           13.6                  
Gain on remeasurement of equity interest before acquisition recorded in Accumulated other comprehensive income (loss)                             20.3                                        
Acquired intangible assets                       5.4 2.1 7.5       7.5         7.5                   2.1 2.1  
Acquisition related costs 18.0   22.9                                                           18.0 22.9  
Deferred debt issuance costs                                                                 16.7 16.7  
Interest Expense 81.0 13.3 119.2 23.5                                                         30.4 38.3  
Accumulated amortization of deferred debt issuance costs                                                                 0.7 0.7  
Other current assets 152.1   152.1   114.8                                                       1.7 1.7  
Other non-current assets 230.6   230.6   187.9                                                       15.0 15.0  
Goodwill                   27.8 1,026.8     27.8     (3.1) 24.7                             1,026.8 1,026.8  
Goodwill tax deductibility                                           None of the goodwill is expected to be deductible for income tax purposes.                          
Number of shares acquired through business combination           29                                             29            
Percentage of shares acquired                                                     100.00%       100.00%   100.00% 100.00%  
Cost per share acquired                                                       1.00             17.25
Common stock exchanged per share acquired                                                   $ 0.0201                  
Fair value of equity portion of acquisition consideration                                     173.1                                
Number of shares issued as acquisition consideration                                                       4.2              
Acquisition price, value of iron ore pellets                           18.9   15.0 (1.4) 17.5         18.9                        
Total consideration transferred including interest held prior to acquisition         1.7                 775.9     (1.4) 774.5               185.9             4,554.0 4,554.0  
Tons of rated capacity                                                           5,500,000          
Increase in tons of rated capacity             50,000,000   4,000,000                                                    
Estimated coal reserve base                                               59,000,000 62,000,000                    
Increase in coal reserve base               166,000,000                                                      
Ring of Fire properties, expected annual tons of high-grade chromite ore                                                   1,000,000                  
Ring of Fire properties, expected annual tons of ferrochrome processed                                                   600,000                  
Business acquisition cost of acquired entity purchase price per share                                                               17.25      
Gross post-project production capacity, tons 8,000,000   8,000,000                                                                
Incremental revenue                                                                 145.8    
Operating loss                                                                   (7.2)  
Inventory Adjustments                                                                 (48.4) (48.4)  
Amount excluded from pro forma net income $ 60.3   $ 67.2