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Note 12 - Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 2016
Notes Tables  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
(in millions of shares)
 
Three Months Ended
March 31,
 
 
 
2016
 
 
2015
 
Restricted stock units
    0.4       -  
Stock options
    1.7       0.9  
      2.1       0.9