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Commitments and Contingencies - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 0 Months Ended 9 Months Ended 9 Months Ended 12 Months Ended 12 Months Ended 4 Months Ended 12 Months Ended 3 Months Ended 72 Months Ended 12 Months Ended 36 Months Ended 72 Months Ended 12 Months Ended 0 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended 7 Months Ended 10 Months Ended 12 Months Ended 1 Months Ended 4 Months Ended 3 Months Ended 0 Months Ended
Apr. 22, 2014
Nov. 30, 2012
Plaintiff
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Sep. 30, 2014
Minimum
Sep. 30, 2014
Maximum
Dec. 31, 2013
Circuit Court Of Cook County
plaintiff
Jan. 04, 2011
Circuit Court Of Cook County
Plaintiff
Dec. 31, 2010
Court of Common Pleas, Philadelphia County
Jan. 04, 2011
Court of Common Pleas, Philadelphia County
Plaintiff
Apr. 22, 2011
Settlement Agreement
Plaintiff
Dec. 31, 2013
Settlement Agreement
Apr. 22, 2011
Settlement Agreement
Apr. 29, 2011
Settlement Agreement
Sep. 30, 2014
Supreme Court of Kings County New York [Member]
Plaintiff
Dec. 31, 2004
1999-2004
Circuit Court Of Cook County
plaintiff
case
Dec. 31, 2009
2009
Circuit Court Of Cook County
case
Dec. 31, 2008
2008
Circuit Court Of Cook County
Plaintiff
Dec. 31, 2009
2007-2009
Court of Common Pleas, Philadelphia County
Plaintiff
case
Dec. 31, 2009
2007-2009
Court of Common Pleas, Philadelphia County
Case
Dec. 31, 2004
Outside Chicago Firefighter Plaintiffs
1999-2004
Circuit Court Of Cook County
plaintiff
Dec. 31, 2009
Pennsylvania Firefighter Plaintiffs
2009
Circuit Court Of Cook County
plaintiff
Nov. 30, 2012
Chicago Firefighter Plaintiffs
Plaintiff
Dec. 31, 2012
Chicago Firefighter Plaintiffs
Plaintiff
Nov. 30, 2011
Chicago Firefighter Plaintiffs
Plaintiff
Dec. 31, 2009
Chicago Firefighter Plaintiffs
Minimum
plaintiff
Dec. 31, 2009
Chicago Firefighter Plaintiffs
Maximum
Plaintiff
Dec. 31, 2009
Chicago Firefighter Plaintiffs
2009
Plaintiff
Dec. 31, 2009
Chicago Firefighter Plaintiffs
2009
Circuit Court Of Cook County
Plaintiff
Oct. 31, 2012
Philadelphia Firefighter Plaintiffs
Court of Common Pleas, Philadelphia County
Plaintiff
Case
Mar. 31, 2014
Philadelphia Firefighter Plaintiffs
Court of Common Pleas, Philadelphia County
case
Jun. 30, 2014
Philadelphia Firefighter Plaintiffs
Court of Common Pleas, Philadelphia County
case
Dec. 31, 2010
Philadelphia Firefighter Plaintiffs
2010
Court of Common Pleas, Philadelphia County
plaintiff
Dec. 31, 2010
Philadelphia Firefighter Plaintiffs
2010
Court of Common Pleas, Philadelphia County
Plaintiff
Mar. 31, 2014
Pittsburgh Firefighter Plaintiffs
Court of Common Pleas, Philadelphia County
Plaintiff
Jul. 31, 2013
Pittsburgh Firefighter Plaintiffs
Allegheny County, Pennsylvania
Plaintiff
Sep. 30, 2014
Buffalo Firefighter Plaintiffs [Member] [Domain]
Supreme Court of State of New York Erie County [Member] [Member]
Plaintiff
Nov. 04, 2014
Subsequent Event [Member]
Commitments Disclosure [Line Items]                                                                              
Stock Repurchase Program, Authorized Amount $ 15.0                                                                           $ 75.0
Amount outstanding standby letters of credit     46.6                                                                        
Warranty maturity periods           1 year 5 years                                                                
Reserves related to environmental remediation     1.3   1.4                                                                    
Number of additional cases filed by firefighters                                 33 6   71 71               40   20                
Number of plaintiffs               74       1,069         2,443     71 71 1,800 299 3 3 8 9 40     20     9 9 61 246 193  
Loss Contingency, Claims Dismissed, Number                                       3 3                             20      
Loss Contingency, New Claims Filed, Number                               4                                           20  
Loss Contingency, Number of Cases Dismissed                                                               4         38    
Loss Contingency, Number of Cases Scheduled                                                                 11            
Number of cases of plaintiff's claims                                     27 3 4                                    
Plaintiff's counsel later moved to reduce the number of plaintiff                                                           9                  
Claims settled amount                         3.8                                 0.4                  
Number of plaintiffs cases dismissed   2                                                                          
Damages maximum amount                   0.1                                                          
Damages subsequently reduced, minimum amount                   0.08                                                          
Number of claimants settled                 308   1,125                                                        
Percentage of claimants agreed for settlement                       95.02%   95.02% 93.00%                                                
Percentage of claimants agreed for settlement as per settlement agreement                             100.00%                                                
Settlement Agreement payment made                           (3.6)                                                  
Reimbursement     0.2 0.4                                                                      
Latvian Commercial Case Range of Loss           $ 0 $ 5.0