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Acquisitions - Narrative (Details)
$ in Thousands
3 Months Ended
Jul. 02, 2018
USD ($)
Apr. 04, 2017
USD ($)
Dec. 31, 2018
USD ($)
Mar. 31, 2018
USD ($)
business
Jul. 01, 2017
USD ($)
business
Apr. 01, 2017
USD ($)
Sep. 29, 2018
USD ($)
Dec. 31, 2017
USD ($)
Business Acquisition [Line Items]                
Goodwill             $ 2,522,139 $ 2,471,459
Godfrey Hirst Group                
Business Acquisition [Line Items]                
Purchase agreement price $ 400,894              
Goodwill 88,636              
Intangible assets subject to amortization 43,635              
Emilceramica S.r.l                
Business Acquisition [Line Items]                
Purchase agreement price   $ 186,099            
Goodwill   59,491            
Intangible assets subject to amortization   2,348            
Tradenames | Godfrey Hirst Group                
Business Acquisition [Line Items]                
Indefinite-lived tradename intangible asset $ 58,671              
Tradenames | Emilceramica S.r.l                
Business Acquisition [Line Items]                
Indefinite-lived tradename intangible asset   $ 16,196            
Flooring ROW segment                
Business Acquisition [Line Items]                
Purchase agreement price       $ 24,410        
Goodwill       12,548     970,145 908,807
Intangible assets subject to amortization       $ 7        
Number of acquisitions | business       3        
Flooring ROW segment | Flooring ROW Acquisition                
Business Acquisition [Line Items]                
Purchase agreement price           $ 1,407    
Intangible assets subject to amortization           $ 827    
Global Ceramic segment                
Business Acquisition [Line Items]                
Goodwill             1,020,100 1,035,942
Global Ceramic segment | Global Ceramic Acquisitions                
Business Acquisition [Line Items]                
Purchase agreement price         $ 37,250      
Goodwill         $ 1,002      
Number of acquisitions | business         2      
Flooring NA segment                
Business Acquisition [Line Items]                
Goodwill             $ 531,894 $ 526,710
Flooring NA segment | Flooring NA Acquisition                
Business Acquisition [Line Items]                
Purchase agreement price         $ 26,623      
Subsequent Event [Member] | Forecast | Eliane                
Business Acquisition [Line Items]                
Purchase agreement price     $ 250,000