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Stockholders' Equity - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Feb. 09, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Jun. 30, 2015
Apr. 30, 2014
Class of Stock [Line Items]            
Common stock, shares authorized   90,000,000 90,000,000      
Common stock, par value (usd per share)   $ 1 $ 1      
Common stock, shares issued   64,800,000 64,200,000      
Common stock, shares outstanding   62,200,000 62,500,000      
Preference stock, shares authorized   800,000        
Preference stock, par value (usd per share)   $ 1        
Cash dividends declared per common share (usd per share)   $ 0.25 $ 0.09 $ 0    
Authorized amount         $ 15.0 $ 15.0
Shares acquired   724,792 696,263      
Stock repurchase program, amount acquired   $ 10.6 $ 10.3      
Cash dividends paid to stockholders   15.6 5.6 $ 0.0    
Foreign currency translation loss attributable to Fire Rescue Group   88.8 79.5 41.9    
Subsequent Event [Member]            
Class of Stock [Line Items]            
Cash dividends declared per common share (usd per share) $ 0.07          
Foreign Currency Translation [Member]            
Class of Stock [Line Items]            
Foreign currency translation loss attributable to Fire Rescue Group   13.3 $ (0.2) $ (16.0)    
Fire Rescue | Foreign Currency Translation [Member]            
Class of Stock [Line Items]            
Foreign currency translation loss attributable to Fire Rescue Group   $ 7.4