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Commitments and Contingencies (Details)
 1 Months Ended 12 Months Ended 24 Months Ended 60 Months Ended 96 Months Ended
Jan. 31, 2011
insurer
Dec. 31, 2018
USD ($)
defendant
case
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2018
USD ($)
case
Dec. 31, 2018
USD ($)
case
Dec. 31, 2018
USD ($)
case
Loss Contingencies [Line Items]                  
Rent expense   $ 18,300,000 $ 19,300,000 $ 18,600,000          
Amount of letters of credit   $ 13,600,000         $ 13,600,000 $ 13,600,000 $ 13,600,000
Asbestos Litigation                  
Loss Contingencies [Line Items]                  
Number of defendants | defendant   40              
Asbestos Litigation                  
Loss Contingencies [Line Items]                  
Annual out-of-pocket costs (less than)     $ 200,000 $ 200,000 $ 200,000 $ 200,000   $ 200,000  
New claims filed each year (fewer than) | case   25              
Pending lawsuits (fewer than) | case   150         150 150 150
Face amount of insurance coverage per occurrence (over)   $ 17,000,000         $ 17,000,000 $ 17,000,000 $ 17,000,000
Aggregate primary insurance coverage (over)   23,000,000         23,000,000 23,000,000 23,000,000
Face amount of excess coverage (over)   $ 950,000,000         950,000,000 $ 950,000,000 950,000,000
Number of primary insurers under settlement agreement | insurer 7                
Percentage of costs of handling and settling each claim covered by insurance 80.00%                
Insurers                  
Loss Contingencies [Line Items]                  
Payments for legal settlements             $ 40,000   $ 2,000,000