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Contingencies - Additional Information (Details)
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 08, 2017
USD ($)
Feb. 09, 2017
USD ($)
Oct. 06, 2016
USD ($)
policy
Aug. 31, 2017
USD ($)
Jun. 30, 2018
USD ($)
LegalMatter
Jun. 30, 2018
USD ($)
LegalMatter
Vendor
Jun. 30, 2017
USD ($)
Dec. 31, 2017
USD ($)
LegalMatter
Dec. 31, 2010
policy
Dec. 31, 2009
policy
Dec. 31, 2016
USD ($)
LegalMatter
Loss Contingencies [Line Items]                      
Loss contingency, years of activity           5 years          
Number of insurance carriers | Vendor           20          
Insurance receivables         $ 125,700,000 $ 125,700,000   $ 134,700,000     $ 159,900,000
Insurance receivables, current         10,600,000 10,600,000   11,600,000      
Insurance receivables, noncurrent         115,100,000 115,100,000   123,100,000      
Notes receivable from insurance companies         63,800,000 63,800,000   76,900,000     $ 67,300,000
Notes receivable from insurance companies, current         3,494,000 3,494,000   17,333,000      
Notes Receivables from Insurance Companies, Noncurrent         60,300,000 60,300,000   59,600,000      
Payment received pursuant to insurance policies $ 80,900,000                    
Product Warranty Expense           5,500,000 $ 3,600,000        
Single Incident                      
Loss Contingencies [Line Items]                      
Product liability accrual         $ 4,700,000 4,700,000   $ 5,400,000      
Product liability expense           $ 900,000 200,000        
Lawsuit                      
Loss Contingencies [Line Items]                      
Number of lawsuits | LegalMatter         1,470 1,470   1,420     1,794
Damages from Product Defects                      
Loss Contingencies [Line Items]                      
Number of lawsuits | LegalMatter         2,345 2,345   2,242     3,023
Unasserted Claim                      
Loss Contingencies [Line Items]                      
Product liability accrual         $ 107,800,000 $ 107,800,000   $ 111,100,000      
Cumulative Trauma                      
Loss Contingencies [Line Items]                      
Product liability accrual         162,300,000 162,300,000   181,100,000      
Product liability expense           11,800,000 97,600,000        
Cumulative Trauma, Reported Claims                      
Loss Contingencies [Line Items]                      
Product liability accrual         54,500,000 54,500,000   70,000,000      
Claims Settled, But Not Yet Paid                      
Loss Contingencies [Line Items]                      
Product liability accrual         39,000,000 39,000,000   54,500,000      
Claims Asserted But Not Yet Resolved                      
Loss Contingencies [Line Items]                      
Product liability accrual         15,500,000 15,500,000   15,500,000      
Uninsured Cumulative Trauma                      
Loss Contingencies [Line Items]                      
Product liability expense           10,800,000 $ 29,600,000        
Other Current Liabilities | Cumulative Trauma                      
Loss Contingencies [Line Items]                      
Product liability accrual         47,400,000 47,400,000   48,600,000      
Other Noncurrent Liabilities | Cumulative Trauma                      
Loss Contingencies [Line Items]                      
Product liability accrual         7,100,000 7,100,000   21,400,000      
North River Insurance Company                      
Loss Contingencies [Line Items]                      
Gain contingency, number of policies allegedly breached | policy     3           3 1  
Litigation Settlement, Amount Awarded from Other Party     $ 10,900,000                
Damages awarded   $ 48,900,000                  
Settled Litigation                      
Loss Contingencies [Line Items]                      
Payments to resolve cumulative trauma claims           14,300,000   $ 25,200,000      
Insurance receivables         $ 51,000,000 51,000,000          
Damages awarded       $ 75,200,000              
Subsequent Event | Settled Litigation | Scenario, Forecast                      
Loss Contingencies [Line Items]                      
Loss Contingency Accrual, Payments           $ 7,100,000          
Loss Contingency Accrual, Number of Periodic Payments         5