Revenue from Contracts with Customers (Summary of Disaggregated Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 31, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Net sales	$ 2,424,512	$ 2,519,185	$ 2,584,485	$ 2,442,490	$ 2,448,618	$ 2,545,800	$ 2,577,014	$ 2,412,202	$ 9,970,672	$ 9,983,634	$ 9,491,290
Ceramic & Stone
Disaggregation of Revenue [Line Items]
Net sales									3,686,645	3,621,193	3,485,245
Carpet & Resilient
Disaggregation of Revenue [Line Items]
Net sales									3,921,769	3,903,698	3,655,902
Laminate & Wood
Disaggregation of Revenue [Line Items]
Net sales									1,501,077	1,553,032	1,519,417
Other
Disaggregation of Revenue [Line Items]
Net sales									861,181	905,711	830,726
United States
Disaggregation of Revenue [Line Items]
Net sales									5,822,593	6,103,789	6,035,200
Europe
Disaggregation of Revenue [Line Items]
Net sales									2,532,239	2,582,692	2,363,069
Russia
Disaggregation of Revenue [Line Items]
Net sales									385,395	349,220	326,075
Other
Disaggregation of Revenue [Line Items]
Net sales									1,230,445	947,933	766,946
Operating segments | Global Ceramic segment
Disaggregation of Revenue [Line Items]
Net sales									3,631,142	3,552,856	3,405,100
Operating segments | Global Ceramic segment | Ceramic & Stone
Disaggregation of Revenue [Line Items]
Net sales									3,631,142	3,552,856	3,405,100
Operating segments | Global Ceramic segment | Carpet & Resilient
Disaggregation of Revenue [Line Items]
Net sales									0	0	0
Operating segments | Global Ceramic segment | Laminate & Wood
Disaggregation of Revenue [Line Items]
Net sales									0	0	0
Operating segments | Global Ceramic segment | Other
Disaggregation of Revenue [Line Items]
Net sales									0	0	0
Operating segments | Global Ceramic segment | United States
Disaggregation of Revenue [Line Items]
Net sales									2,131,029	2,251,233	2,223,998
Operating segments | Global Ceramic segment | Europe
Disaggregation of Revenue [Line Items]
Net sales									711,762	714,315	645,341
Operating segments | Global Ceramic segment | Russia
Disaggregation of Revenue [Line Items]
Net sales									269,142	245,867	235,043
Operating segments | Global Ceramic segment | Other
Disaggregation of Revenue [Line Items]
Net sales									519,209	341,441	300,718
Operating segments | Flooring NA segment
Disaggregation of Revenue [Line Items]
Net sales									3,843,714	4,029,148	4,010,858
Operating segments | Flooring NA segment | Ceramic & Stone
Disaggregation of Revenue [Line Items]
Net sales									55,503	68,337	80,145
Operating segments | Flooring NA segment | Carpet & Resilient
Disaggregation of Revenue [Line Items]
Net sales									3,136,474	3,258,029	3,219,971
Operating segments | Flooring NA segment | Laminate & Wood
Disaggregation of Revenue [Line Items]
Net sales									651,737	702,782	710,742
Operating segments | Flooring NA segment | Other
Disaggregation of Revenue [Line Items]
Net sales									0	0	0
Operating segments | Flooring NA segment | United States
Disaggregation of Revenue [Line Items]
Net sales									3,688,691	3,851,267	3,809,211
Operating segments | Flooring NA segment | Europe
Disaggregation of Revenue [Line Items]
Net sales									6,922	6,487	19,100
Operating segments | Flooring NA segment | Russia
Disaggregation of Revenue [Line Items]
Net sales									66	2	(1)
Operating segments | Flooring NA segment | Other
Disaggregation of Revenue [Line Items]
Net sales									148,035	171,392	182,548
Operating segments | Flooring ROW segment
Disaggregation of Revenue [Line Items]
Net sales									2,495,816	2,401,630	2,075,452
Operating segments | Flooring ROW segment | Ceramic & Stone
Disaggregation of Revenue [Line Items]
Net sales									0	0	0
Operating segments | Flooring ROW segment | Carpet & Resilient
Disaggregation of Revenue [Line Items]
Net sales									785,295	645,669	435,931
Operating segments | Flooring ROW segment | Laminate & Wood
Disaggregation of Revenue [Line Items]
Net sales									849,340	850,250	808,675
Operating segments | Flooring ROW segment | Other
Disaggregation of Revenue [Line Items]
Net sales									861,181	905,711	830,846
Operating segments | Flooring ROW segment | United States
Disaggregation of Revenue [Line Items]
Net sales									2,873	1,289	2,111
Operating segments | Flooring ROW segment | Europe
Disaggregation of Revenue [Line Items]
Net sales									1,813,555	1,861,890	1,698,628
Operating segments | Flooring ROW segment | Russia
Disaggregation of Revenue [Line Items]
Net sales									116,187	103,351	91,033
Operating segments | Flooring ROW segment | Other
Disaggregation of Revenue [Line Items]
Net sales									563,201	435,100	283,680
Intersegment sales
Disaggregation of Revenue [Line Items]
Net sales									0	0	(120)
Intersegment sales | Ceramic & Stone
Disaggregation of Revenue [Line Items]
Net sales									0	0	0
Intersegment sales | Carpet & Resilient
Disaggregation of Revenue [Line Items]
Net sales									0	0	0
Intersegment sales | Laminate & Wood
Disaggregation of Revenue [Line Items]
Net sales									0	0	0
Intersegment sales | Other
Disaggregation of Revenue [Line Items]
Net sales									0	0	(120)
Intersegment sales | United States
Disaggregation of Revenue [Line Items]
Net sales									0	0	(120)
Intersegment sales | Europe
Disaggregation of Revenue [Line Items]
Net sales									0	0	0
Intersegment sales | Russia
Disaggregation of Revenue [Line Items]
Net sales									0	0	0
Intersegment sales | Other
Disaggregation of Revenue [Line Items]
Net sales									$ 0	$ 0	$ 0