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Retirement Benefits (Tables)
9 Months Ended
Sep. 30, 2013
Retirement Benefits Pension And Postretirement [Line Items]  
Schedule Of Net Benefit Costs [Table Text Block]
   U.S. Plans Non-U.S. Plans Total 
 (In millions) 2013 2012 2013 2012 2013 2012 
               
 Three months ended September 30,             
               
 Service cost$ -  -  3.7  2.8  3.7  2.8 
 Interest cost on projected benefit obligation  10.6  11.0  4.7  5.0  15.3  16.0 
 Return on assets – expected  (14.2)  (14.9)  (3.2)  (3.0)  (17.4)  (17.9) 
 Amortization of losses  11.2  9.7  1.5  0.9  12.7  10.6 
 Amortization of prior service cost  -  -  0.2  0.6  0.2  0.6 
 Settlement loss   -  1.0  0.8  1.5  0.8  2.5 
 Net periodic pension cost$ 7.6  6.8  7.7  7.8  15.3  14.6 
               
 Nine months ended September 30,             
               
 Service cost$ -  -  11.1  8.2  11.1  8.2 
 Interest cost on projected benefit obligation  31.7  33.0  14.3  13.9  46.0  46.9 
 Return on assets – expected  (42.7)  (44.9)  (9.6)  (9.1)  (52.3)  (54.0) 
 Amortization of losses  33.9  29.4  4.6  3.0  38.5  32.4 
 Amortization of prior service cost  -  -  0.7  1.4  0.7  1.4 
 Settlement loss   -  5.0  1.6  2.6  1.6  7.6 
 Net periodic pension cost$ 22.9  22.5  22.7  20.0  45.6  42.5 
Schedule of Costs of Retirement Plans [Table Text Block]
    UMWA Plans Black Lung and Other Plans Total 
 (In millions) 2013 2012 2013 2012 2013 2012 
                
 Three months ended September 30,             
                
 Service cost$ -  -  -  0.2  -  0.2 
 Interest cost on accumulated postretirement benefit obligations  4.9  5.6  0.5  0.7  5.4  6.3 
 Return on assets – expected  (5.2)  (5.3)  -  -  (5.2)  (5.3) 
 Amortization of losses   4.9  5.1  0.2  0.4  5.1  5.5 
 Amortization of prior service cost  -  -  0.5  0.5  0.5  0.5 
 Net periodic postretirement cost$ 4.6  5.4  1.2  1.8  5.8  7.2 
                
 Nine months ended September 30,             
                
 Service cost$ -  -  0.2  0.3  0.2  0.3 
 Interest cost on accumulated postretirement benefit obligations  14.8  16.8  1.5  2.2  16.3  19.0 
 Return on assets – expected  (15.6)  (15.9)  -  -  (15.6)  (15.9) 
 Amortization of losses  14.7  15.6  0.5  1.0  15.2  16.6 
 Amortization of prior service cost  -  -  1.3  1.5  1.3  1.5 
 Net periodic postretirement cost$ 13.9  16.5  3.5  5.0  17.4  21.5