Restructuring, Acquisition Transaction and Integration-Related Costs (Related Costs Restructuring Reserve) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Reserve [Roll Forward]
Beginning balance	$ 8,513	$ 1,095
Provision	90,341	58,991	$ 37,085
Cash payments	(35,654)	(43,716)
Non-cash items	(58,941)	(7,858)
Ending balance	4,259	8,513	1,095
Lease impairments
Restructuring Reserve [Roll Forward]
Beginning balance	397	359
Cash payments	(376)	(726)
Non-cash items	0	0
Ending balance	21	397	359
Asset write-downs
Restructuring Reserve [Roll Forward]
Beginning balance	0	0
Cash payments	0	0
Non-cash items	(41,756)	(4,071)
Ending balance	0	0	0
Severance
Restructuring Reserve [Roll Forward]
Beginning balance	7,866	584
Cash payments	(16,113)	(12,605)
Non-cash items	(142)	(230)
Ending balance	4,122	7,866	584
Other restructuring costs
Restructuring Reserve [Roll Forward]
Beginning balance	250	152
Cash payments	(19,165)	(30,385)
Non-cash items	(17,043)	(3,557)
Ending balance	116	250	$ 152
Corporate
Restructuring Reserve [Roll Forward]
Provision	15	3,278
Corporate | Lease impairments
Restructuring Reserve [Roll Forward]
Provision	0	0
Corporate | Asset write-downs
Restructuring Reserve [Roll Forward]
Provision	0	0
Corporate | Severance
Restructuring Reserve [Roll Forward]
Provision	15	3,278
Corporate | Other restructuring costs
Restructuring Reserve [Roll Forward]
Provision	0	0
Operating segments | Global Ceramic
Restructuring Reserve [Roll Forward]
Provision	5,264	9,109
Operating segments | Global Ceramic | Lease impairments
Restructuring Reserve [Roll Forward]
Provision	0	528
Operating segments | Global Ceramic | Asset write-downs
Restructuring Reserve [Roll Forward]
Provision	0	1,131
Operating segments | Global Ceramic | Severance
Restructuring Reserve [Roll Forward]
Provision	5,264	7,113
Operating segments | Global Ceramic | Other restructuring costs
Restructuring Reserve [Roll Forward]
Provision	0	337
Operating segments | Flooring NA
Restructuring Reserve [Roll Forward]
Provision	74,412	41,968
Operating segments | Flooring NA | Lease impairments
Restructuring Reserve [Roll Forward]
Provision	0	236
Operating segments | Flooring NA | Asset write-downs
Restructuring Reserve [Roll Forward]
Provision	37,820	2,940
Operating segments | Flooring NA | Severance
Restructuring Reserve [Roll Forward]
Provision	2,617	4,985
Operating segments | Flooring NA | Other restructuring costs
Restructuring Reserve [Roll Forward]
Provision	33,975	33,807
Operating segments | Flooring ROW
Restructuring Reserve [Roll Forward]
Provision	10,650	4,637
Operating segments | Flooring ROW | Lease impairments
Restructuring Reserve [Roll Forward]
Provision	0	0
Operating segments | Flooring ROW | Asset write-downs
Restructuring Reserve [Roll Forward]
Provision	3,936	0
Operating segments | Flooring ROW | Severance
Restructuring Reserve [Roll Forward]
Provision	4,615	4,741
Operating segments | Flooring ROW | Other restructuring costs
Restructuring Reserve [Roll Forward]
Provision	$ 2,099	$ (104)