Restructuring, acquisition and integration-related costs - Restructuring Reserve (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018	$ 8,513
Restructuring costs	45,533	$ 42,791
Cash payments	(24,778)
Non-cash items	(24,547)
Balance as of September 28, 2019	4,721
Lease impairments
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018	397
Cash payments	(361)
Non-cash items	0
Balance as of September 28, 2019	36
Asset write-downs
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018	0
Cash payments	0
Non-cash items	(24,306)
Balance as of September 28, 2019	0
Severance
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018	7,866
Cash payments	(11,715)
Non-cash items	(130)
Balance as of September 28, 2019	4,435
Other restructuring costs
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018	250
Cash payments	(12,702)
Non-cash items	(111)
Balance as of September 28, 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	35,046
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	21,791
Operating segments | Provision - Flooring NA segment | Severance
Restructuring Reserve [Roll Forward]
Restructuring costs	1,168
Operating segments | Provision - Flooring NA segment | Other restructuring costs
Restructuring Reserve [Roll Forward]
Restructuring costs	12,087
Operating segments | Provision - Flooring ROW segment
Restructuring Reserve [Roll Forward]
Restructuring costs	5,608
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	2,515
Operating segments | Provision - Flooring ROW segment | Severance
Restructuring Reserve [Roll Forward]
Restructuring costs	2,367
Operating segments | Provision - Flooring ROW segment | Other restructuring costs
Restructuring Reserve [Roll Forward]
Restructuring costs	$ 726