Goodwill and Intangible Assets - Schedule of goodwill (Details) $ in Thousands	6 Months Ended
	Jul. 03, 2021 USD ($)
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	$ 3,978,256
Accumulated impairment losses, beginning balance	(1,327,425)
Goodwill, net, beginning balance	2,650,831
Currency translation during the period	(41,657)
Goodwill, gross, ending balance	3,936,599
Accumulated impairment losses, ending balance	(1,327,425)
Goodwill, net, ending balance	2,609,174
Global Ceramic segment
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	1,579,491
Accumulated impairment losses, beginning balance	(531,930)
Goodwill, net, beginning balance	1,047,561
Currency translation during the period	(5,267)
Goodwill, gross, ending balance	1,574,224
Accumulated impairment losses, ending balance	(531,930)
Goodwill, net, ending balance	1,042,294
Flooring NA segment
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	874,198
Accumulated impairment losses, beginning balance	(343,054)
Goodwill, net, beginning balance	531,144
Currency translation during the period	0
Goodwill, gross, ending balance	874,198
Accumulated impairment losses, ending balance	(343,054)
Goodwill, net, ending balance	531,144
Flooring ROW segment
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	1,524,567
Accumulated impairment losses, beginning balance	(452,441)
Goodwill, net, beginning balance	1,072,126
Currency translation during the period	(36,390)
Goodwill, gross, ending balance	1,488,177
Accumulated impairment losses, ending balance	(452,441)
Goodwill, net, ending balance	$ 1,035,736