Restructuring, acquisition and integration-related costs - Restructuring Reserve (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2019	$ 4,259
Restructuring costs	73,749	$ 37,758
Cash payments	(11,359)
Non-cash items	(41,995)
Balance as of June 27, 2020	24,654
Lease impairments
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2019	21
Cash payments	(16)
Non-cash items	0
Balance as of June 27, 2020	5
Asset write-downs
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2019	0
Cash payments	0
Non-cash items	(39,855)
Balance as of June 27, 2020	0
Severance
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2019	4,122
Cash payments	(5,617)
Non-cash items	(151)
Balance as of June 27, 2020	24,186
Other restructuring costs
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2019	116
Cash payments	(5,726)
Non-cash items	(1,989)
Balance as of June 27, 2020	463
Provision - Corporate
Restructuring Reserve [Roll Forward]
Restructuring costs	1,259
Provision - Corporate | Lease impairments
Restructuring Reserve [Roll Forward]
Restructuring costs	0
Provision - Corporate | Asset write-downs
Restructuring Reserve [Roll Forward]
Restructuring costs	0
Provision - Corporate | Severance
Restructuring Reserve [Roll Forward]
Restructuring costs	1,259
Provision - Corporate | Other restructuring costs
Restructuring Reserve [Roll Forward]
Restructuring costs	0
Operating segments | Global Ceramic segment
Restructuring Reserve [Roll Forward]
Restructuring costs	16,883
Operating segments | Global Ceramic segment | Lease impairments
Restructuring Reserve [Roll Forward]
Restructuring costs	0
Operating segments | Global Ceramic segment | Asset write-downs
Restructuring Reserve [Roll Forward]
Restructuring costs	4,625
Operating segments | Global Ceramic segment | Severance
Restructuring Reserve [Roll Forward]
Restructuring costs	11,953
Operating segments | Global Ceramic segment | Other restructuring costs
Restructuring Reserve [Roll Forward]
Restructuring costs	305
Operating segments | Provision - Flooring NA segment
Restructuring Reserve [Roll Forward]
Restructuring costs	36,995
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	26,332
Operating segments | Provision - Flooring NA segment | Severance
Restructuring Reserve [Roll Forward]
Restructuring costs	4,982
Operating segments | Provision - Flooring NA segment | Other restructuring costs
Restructuring Reserve [Roll Forward]
Restructuring costs	5,681
Operating segments | Provision - Flooring ROW segment
Restructuring Reserve [Roll Forward]
Restructuring costs	18,612
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	8,898
Operating segments | Provision - Flooring ROW segment | Severance
Restructuring Reserve [Roll Forward]
Restructuring costs	7,638
Operating segments | Provision - Flooring ROW segment | Other restructuring costs
Restructuring Reserve [Roll Forward]
Restructuring costs	$ 2,076