Summary of Significant Accounting Policies (Computations Of Basic And Diluted Earnings (Loss) Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended								12 Months Ended
	Dec. 20, 2018	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
Accounting Policies [Abstract]
Earnings attributable to Mohawk Industries, Inc.		$ 264,667	$ 155,518	$ 202,441	$ 121,585	$ 229,339	$ 227,013	$ 196,586	$ 208,766	$ 744,211	$ 861,704	$ 971,638
Accretion of redeemable noncontrolling interest										0	(3,892)	(46)
Net earnings available to common stockholders										$ 744,211	$ 857,812	$ 971,592
Weighted-average common shares outstanding-basic (in shares)										71,986	74,413	74,357
Add weighted-average dilutive potential common shares - options and RSU’s to purchase common shares, net (in shares)										278	360	482
Weighted-average common shares outstanding-diluted (in shares)										72,264	74,773	74,839
Basic earnings per share (usd per share)		$ 3.69	$ 2.16	$ 2.80	$ 1.68	$ 3.07	$ 3.03	$ 2.64	$ 2.80	$ 10.34	$ 11.53	$ 13.07
Diluted earnings per share (usd per share)		$ 3.68	$ 2.15	$ 2.79	$ 1.67	$ 3.05	$ 3.02	$ 2.62	$ 2.78	$ 10.30	$ 11.47	$ 12.98
Put option of redeemable noncontrolling interest	$ 33,884										$ 0