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Interest and Other Nonoperating Income (Tables)
12 Months Ended
Dec. 31, 2011
Interest and Other Income [Abstract]  
Schedule of Other Nonoperating Income (Expense) [Table Text Block]
   Years Ended December 31, 
 (In millions) 2011 2010 2009 
            
 Interest income$ 5.9   4.1   10.8  
 Gain on available-for-sale securities  4.4   3.8   -  
 Other  (1.2)   0.2   -  
 Total$ 9.1   8.1   10.8