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Consolidated Statements of Equity - USD ($)
$ in Millions
Total
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Loss
Retained Earnings
Treasury Stock
Performance Shares
Common Stock
As Reported
Retained Earnings
Restatement Adjustment
Retained Earnings
Balance at beginning of year at Dec. 31, 2015   $ 1.4 $ 558.0 $ (207.8) $ 562.3 $ (71.6)   $ 539.5 $ 22.8
Balance (in shares) at Dec. 31, 2015   34,154,290              
Increase (Decrease) in Stockholders' Equity                  
Stock options exercised and issuance of other stock awards     0.3     8.7      
Distribution of Spun-off subsidiary       68.0 60.8        
Stock options exercised (in shares)   687,619              
Restricted stock, net (in shares)   (9,112)              
Performance shares issued (in shares)             127,506    
Stock-based compensation     9.3            
Other comprehensive income (loss)       (23.1)          
Net income (loss) $ (375.8)       (375.8)        
Balance (in shares) at Dec. 31, 2016   34,960,303              
Balance at end of year at Dec. 31, 2016 590.5 $ 1.4 567.6 (162.9) 247.3 (62.9)   247.3  
Increase (Decrease) in Stockholders' Equity                  
Stock options exercised and issuance of other stock awards     2.0     3.1      
Stock options exercised (in shares)   262,118              
Restricted stock, net (in shares)   23,566              
Performance shares issued (in shares)             27,877    
Stock-based compensation     7.0            
Other comprehensive income (loss)       65.5          
Net income (loss) 9.4       9.4        
Balance (in shares) at Dec. 31, 2017   35,273,864              
Balance at end of year at Dec. 31, 2017 677.5 $ 1.4 576.6 (97.4) 256.7 (59.8)   $ 256.7  
Increase (Decrease) in Stockholders' Equity                  
Stock options exercised and issuance of other stock awards     (1.0)     2.9      
Stock options exercised (in shares)   95,019              
Restricted stock, net (in shares)   165,404              
Performance shares issued (in shares)             54,546    
Stock-based compensation     8.2            
Other comprehensive income (loss)       (19.2)          
Net income (loss) (67.1)       (67.1)        
Balance (in shares) at Dec. 31, 2018   35,588,833              
Balance at end of year at Dec. 31, 2018 $ 601.3 $ 1.4 $ 583.8 $ (116.6) $ 189.6 $ (56.9)