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Litigation (Details)
$ in Millions
 1 Months Ended 3 Months Ended 12 Months Ended
Sep. 23, 2019
USD ($)
Jul. 17, 2019
USD ($)
May 31, 2019
USD ($)
plaintiff
defendant
Mar. 08, 2019
USD ($)
Jan. 27, 2014
USD ($)
defendant
Oct. 31, 2018
case
Sep. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
plaintiff
case
defendant
Dec. 31, 2017
USD ($)
plaintiff
Dec. 31, 2018
USD ($)
Sep. 30, 2018
USD ($)
Sep. 04, 2018
USD ($)
Apr. 17, 2018
USD ($)
Loss Contingencies [Line Items]                          
California litigation accrual               $ 12.0 $ 136.3      
Santa Clara County, California Proceeding                          
Loss Contingencies [Line Items]                          
Number of additional defendants | defendant         2                
Amount payable jointly and severally for litigation         $ 1,150.0                
Abatement fund amount proposed by plaintiffs                         $ 730.0
Maximum abatement amount proposed by defendants                         $ 409.1
Abatement amount ordered by court       $ 401.1               $ 409.1  
Setoff of abatement fund       $ 8.0                  
Amount awarded to plaintiffs   $ 305.0                      
Amount awarded per defendant   101.7                      
Initial payment amount $ 25.0 $ 25.0                      
Dismissal order and judgment period   60 days                      
Subsequent annual payments amount   $ 12.0                      
Term of subsequent annual payments   4 years                      
Final payment amount   $ 16.7                      
Maximum amount agreed to backstop and pay on behalf of other defendant   $ 15.0                      
California litigation accrual                     $ 136.3    
Reduction of accural             $ 59.6            
Accural included in current liabilities             12.0            
Accural included in long-term liabilities             $ 64.7            
Pennsylvania Proceedings                          
Loss Contingencies [Line Items]                          
Number of proceedings initiated | case           2              
Ravon Owens v. American Cyanamid, et al., Cesar Sifuentes v. American Cyanamid, et al., and Glenn Burton, Jr. v. American Cyanamid, et al.                          
Loss Contingencies [Line Items]                          
Number of additional defendants | defendant     2                    
Amount awarded to plaintiffs     $ 6.0                    
Number of cases consolidated | case               3          
Number of plaintiffs | plaintiff     3                    
Amount awarded per plaintiff     $ 2.0                    
Maniya Allen, et al. v. American Cyanamid, et al.                          
Loss Contingencies [Line Items]                          
Number of plaintiffs | plaintiff               146          
Number of plaintiffs selected for discovery | plaintiff               6          
Number of cases selected for discovery | case               4          
Dijonae Trammell, et al. v. American Cyanamid, et al.                          
Loss Contingencies [Line Items]                          
Number of plaintiffs | plaintiff               3          
Number of plaintiffs consolidated with another case | plaintiff               1          
Mary Lewis v. Lead Industries Association, et al.                          
Loss Contingencies [Line Items]                          
Number of defendants | defendant               3          
Number of plaintiffs whose claims were paid by private insurance or medicaid | plaintiff                 3        
Number of plaintiffs whose claims were paid by medicaid | plaintiff                 2