Restructuring, acquisition and integration-related costs - Restructuring Reserve (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018	$ 8,513
Restructuring costs	37,758	$ 31,311
Cash payments	(16,782)
Non-cash items	(22,001)
Balance as of June 29, 2019	7,488
Lease impairments
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018	397
Cash payments	(173)
Non-cash items	0
Balance as of June 29, 2019	224
Asset write-downs
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018	0
Cash payments	0
Non-cash items	(21,877)
Balance as of June 29, 2019	0
Severance
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018	7,866
Cash payments	(8,688)
Non-cash items	(13)
Balance as of June 29, 2019	7,014
Other restructuring costs
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018	250
Cash payments	(7,921)
Non-cash items	(111)
Balance as of June 29, 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	30,950
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	1,127
Operating segments | Provision - Flooring NA segment | Other restructuring costs
Restructuring Reserve [Roll Forward]
Restructuring costs	8,032
Operating segments | Provision - Flooring ROW segment
Restructuring Reserve [Roll Forward]
Restructuring costs	1,929
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	86
Operating segments | Provision - Flooring ROW segment | Severance
Restructuring Reserve [Roll Forward]
Restructuring costs	1,843
Operating segments | Provision - Flooring ROW segment | Other restructuring costs
Restructuring Reserve [Roll Forward]
Restructuring costs	$ 0