Restructuring, acquisition and integration-related costs - Restructuring Reserve (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018	$ 8,513
Restructuring costs	32,937	$ 18,182
Cash payments	(6,191)
Non-cash items	(23,705)
Balance as of March 30, 2019	11,554
Lease impairments
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018	397
Cash payments	(145)
Non-cash items	0
Balance as of March 30, 2019	252
Asset write-downs
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018	0
Cash payments	0
Non-cash items	(23,688)
Balance as of March 30, 2019	0
Severance
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018	7,866
Cash payments	(2,733)
Non-cash items	(17)
Balance as of March 30, 2019	11,052
Other restructuring costs
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018	250
Cash payments	(3,313)
Non-cash items	0
Balance as of March 30, 2019	250
Operating segments | Provision - Global Ceramic segment
Restructuring Reserve [Roll Forward]
Restructuring costs	4,879
Operating segments | Provision - Global Ceramic segment | Lease impairments
Restructuring Reserve [Roll Forward]
Restructuring costs	0
Operating segments | Provision - Global Ceramic segment | Asset write-downs
Restructuring Reserve [Roll Forward]
Restructuring costs	0
Operating segments | Provision - Global Ceramic segment | Severance
Restructuring Reserve [Roll Forward]
Restructuring costs	4,879
Operating segments | Provision - Global Ceramic segment | Other restructuring costs
Restructuring Reserve [Roll Forward]
Restructuring costs	0
Operating segments | Provision - Flooring NA segment
Restructuring Reserve [Roll Forward]
Restructuring costs	27,599
Operating segments | Provision - Flooring NA segment | Lease impairments
Restructuring Reserve [Roll Forward]
Restructuring costs	0
Operating segments | Provision - Flooring NA segment | Asset write-downs
Restructuring Reserve [Roll Forward]
Restructuring costs	23,688
Operating segments | Provision - Flooring NA segment | Severance
Restructuring Reserve [Roll Forward]
Restructuring costs	598
Operating segments | Provision - Flooring NA segment | Other restructuring costs
Restructuring Reserve [Roll Forward]
Restructuring costs	3,313
Operating segments | Provision - Flooring ROW segment
Restructuring Reserve [Roll Forward]
Restructuring costs	459
Operating segments | Provision - Flooring ROW segment | Lease impairments
Restructuring Reserve [Roll Forward]
Restructuring costs	0
Operating segments | Provision - Flooring ROW segment | Asset write-downs
Restructuring Reserve [Roll Forward]
Restructuring costs	0
Operating segments | Provision - Flooring ROW segment | Severance
Restructuring Reserve [Roll Forward]
Restructuring costs	459
Operating segments | Provision - Flooring ROW segment | Other restructuring costs
Restructuring Reserve [Roll Forward]
Restructuring costs	$ 0