Revenue from Contracts with Customers (Summary of Disaggregated Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Net sales	$ 2,448,618	$ 2,545,800	$ 2,577,014	$ 2,412,202	$ 2,369,097	$ 2,448,510	$ 2,453,038	$ 2,220,645	$ 9,983,634	$ 9,491,290	$ 8,959,087
Ceramic & Stone
Disaggregation of Revenue [Line Items]
Net sales									3,621,193	3,485,245	3,258,137
Carpet & Resilient
Disaggregation of Revenue [Line Items]
Net sales									3,903,698	3,655,902	3,412,846
Laminate & Wood
Disaggregation of Revenue [Line Items]
Net sales									1,553,032	1,519,417	1,493,995
Other
Disaggregation of Revenue [Line Items]
Net sales									905,711	830,726	794,109
United States
Disaggregation of Revenue [Line Items]
Net sales									6,103,789	6,035,200	5,842,165
Europe
Disaggregation of Revenue [Line Items]
Net sales									2,582,692	2,363,069	2,113,972
Russia
Disaggregation of Revenue [Line Items]
Net sales									349,220	326,075	255,736
Other
Disaggregation of Revenue [Line Items]
Net sales									947,933	766,946	747,214
Operating segments | Global Ceramic segment
Disaggregation of Revenue [Line Items]
Net sales									3,552,856	3,405,100	3,174,706
Operating segments | Global Ceramic segment | Ceramic & Stone
Disaggregation of Revenue [Line Items]
Net sales									3,552,856	3,405,100	3,174,706
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									2,251,233	2,223,998	2,168,693
Operating segments | Global Ceramic segment | Europe
Disaggregation of Revenue [Line Items]
Net sales									714,315	645,341	533,339
Operating segments | Global Ceramic segment | Russia
Disaggregation of Revenue [Line Items]
Net sales									245,867	235,043	180,420
Operating segments | Global Ceramic segment | Other
Disaggregation of Revenue [Line Items]
Net sales									341,441	300,718	292,254
Operating segments | Flooring NA segment
Disaggregation of Revenue [Line Items]
Net sales									4,029,148	4,010,858	3,865,746
Operating segments | Flooring NA segment | Ceramic & Stone
Disaggregation of Revenue [Line Items]
Net sales									68,337	80,145	83,431
Operating segments | Flooring NA segment | Carpet & Resilient
Disaggregation of Revenue [Line Items]
Net sales									3,258,029	3,219,971	3,042,729
Operating segments | Flooring NA segment | Laminate & Wood
Disaggregation of Revenue [Line Items]
Net sales									702,782	710,742	739,586
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									3,851,267	3,809,211	3,670,153
Operating segments | Flooring NA segment | Europe
Disaggregation of Revenue [Line Items]
Net sales									6,487	19,100	15,628
Operating segments | Flooring NA segment | Russia
Disaggregation of Revenue [Line Items]
Net sales									2	(1)	12
Operating segments | Flooring NA segment | Other
Disaggregation of Revenue [Line Items]
Net sales									171,392	182,548	179,953
Operating segments | Flooring ROW segment
Disaggregation of Revenue [Line Items]
Net sales									2,401,630	2,075,452	1,918,635
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									645,669	435,931	370,117
Operating segments | Flooring ROW segment | Laminate & Wood
Disaggregation of Revenue [Line Items]
Net sales									850,250	808,675	754,409
Operating segments | Flooring ROW segment | Other
Disaggregation of Revenue [Line Items]
Net sales									905,711	830,846	794,109
Operating segments | Flooring ROW segment | United States
Disaggregation of Revenue [Line Items]
Net sales									1,289	2,111	3,319
Operating segments | Flooring ROW segment | Europe
Disaggregation of Revenue [Line Items]
Net sales									1,861,890	1,698,628	1,565,005
Operating segments | Flooring ROW segment | Russia
Disaggregation of Revenue [Line Items]
Net sales									103,351	91,033	75,304
Operating segments | Flooring ROW segment | Other
Disaggregation of Revenue [Line Items]
Net sales									435,100	283,680	275,007
Intersegment sales
Disaggregation of Revenue [Line Items]
Net sales									0	(120)	0
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	(120)	0
Intersegment sales | United States
Disaggregation of Revenue [Line Items]
Net sales									0	(120)	0
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