Segment Reporting (Details) $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($) segment	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Segment Reporting [Abstract]
Number of reporting segments (in segments) | segment	3
Segment Reporting Information [Line Items]
Assets	$ 13,687.3	$ 12,736.5	$ 13,520.7
Net sales	10,785.4	10,836.9	11,135.1
Long-lived assets	5,180.7	4,953.9	5,421.7
Cost of sales	8,210.7	8,150.4	8,429.6
Gross profit	2,574.7	2,686.5	2,705.5
Selling, general and administrative expenses	2,065.0	1,984.8	2,119.7
Operating income (loss)	489.8	693.5	(291.9)
General Corporate expense	103.4	58.5	133.9
Other (income) and expense, net	3.3	2.0	(5.4)
Interest expense	17.8	48.5	77.5
Earnings (loss) before income taxes	468.7	643.0	(364.0)
Depreciation and amortization	652.6	638.3	630.3
Capital expenditures (excluding acquisitions)	440.0	454.4	612.9
Ceramic & Stone
Segment Reporting Information [Line Items]
Net sales	4,220.1	4,185.3	4,293.1
Carpet & Resilient
Segment Reporting Information [Line Items]
Net sales	3,734.8	3,866.5	3,955.3
Laminate & Wood
Segment Reporting Information [Line Items]
Net sales	1,752.3	1,728.9	1,732.6
Other
Segment Reporting Information [Line Items]
Net sales	1,078.2	1,056.2	1,154.1
United States
Segment Reporting Information [Line Items]
Net sales	5,813.9	5,939.5	6,040.0
Long-lived assets	2,136.2	2,202.9	2,312.9
Europe
Segment Reporting Information [Line Items]
Net sales	3,366.6	3,194.3	3,381.0
Latin America
Segment Reporting Information [Line Items]
Net sales	728.0	750.5	767.8
Belgium
Segment Reporting Information [Line Items]
Long-lived assets	937.1	865.1	980.8
Other
Segment Reporting Information [Line Items]
Net sales	876.9	952.6	946.3
Long-lived assets	2,107.4	1,885.9	2,128.0
Operating segments
Segment Reporting Information [Line Items]
Cost of sales	8,211.1	8,149.3	8,429.3
Selling, general and administrative expenses	1,961.2	1,927.3	1,986.1
Other segment items	19.9	8.2	877.7
Operating income (loss)	593.2	752.0	(158.0)
Operating segments | Global Ceramic
Segment Reporting Information [Line Items]
Assets	5,155.0	4,591.0	4,988.3
Net sales	4,289.4	4,226.6	4,300.1
Cost of sales	3,108.6	3,088.1	3,121.0
Selling, general and administrative expenses	914.1	880.7	918.7
Other segment items	0.0	8.2	426.9
Operating income (loss)	266.7	249.5	(166.4)
Depreciation and amortization	253.6	219.4	213.1
Capital expenditures (excluding acquisitions)	170.8	160.2	249.0
Operating segments | Global Ceramic | Ceramic & Stone
Segment Reporting Information [Line Items]
Net sales	4,220.1	4,166.2	4,258.9
Operating segments | Global Ceramic | Carpet & Resilient
Segment Reporting Information [Line Items]
Net sales	69.3	60.4	41.2
Operating segments | Global Ceramic | Laminate & Wood
Segment Reporting Information [Line Items]
Net sales	0.0	0.0	0.0
Operating segments | Global Ceramic | Other
Segment Reporting Information [Line Items]
Net sales	0.0	0.0	0.0
Operating segments | Global Ceramic | United States
Segment Reporting Information [Line Items]
Net sales	2,255.4	2,280.1	2,320.0
Operating segments | Global Ceramic | Europe
Segment Reporting Information [Line Items]
Net sales	1,173.5	1,058.3	1,071.7
Operating segments | Global Ceramic | Latin America
Segment Reporting Information [Line Items]
Net sales	685.7	707.7	730.3
Operating segments | Flooring NA
Segment Reporting Information [Line Items]
Assets	3,832.6	3,883.4	3,870.8
Net sales	3,638.5	3,769.9	3,829.4
Cost of sales	2,884.3	2,879.1	3,007.7
Selling, general and administrative expenses	640.6	653.5	667.2
Other segment items	0.0	0.0	215.8
Operating income (loss)	113.6	237.3	(61.3)
Depreciation and amortization	218.6	224.8	221.1
Capital expenditures (excluding acquisitions)	125.8	165.1	193.9
Operating segments | Flooring NA | Ceramic & Stone
Segment Reporting Information [Line Items]
Net sales	0.0	19.1	34.2
Operating segments | Flooring NA | Carpet & Resilient
Segment Reporting Information [Line Items]
Net sales	2,842.7	2,941.3	3,021.1
Operating segments | Flooring NA | Laminate & Wood
Segment Reporting Information [Line Items]
Net sales	795.8	809.5	774.1
Operating segments | Flooring NA | Other
Segment Reporting Information [Line Items]
Net sales	0.0	0.0	0.0
Operating segments | Flooring NA | United States
Segment Reporting Information [Line Items]
Net sales	3,544.7	3,650.7	3,713.3
Operating segments | Flooring NA | Europe
Segment Reporting Information [Line Items]
Net sales	3.1	4.1	4.4
Operating segments | Flooring NA | Latin America
Segment Reporting Information [Line Items]
Net sales	5.3	5.6	3.8
Operating segments | Flooring ROW
Segment Reporting Information [Line Items]
Assets	3,989.2	3,594.7	4,051.6
Net sales	2,857.5	2,840.4	3,005.6
Cost of sales	2,218.2	2,182.1	2,300.6
Selling, general and administrative expenses	406.5	393.1	400.2
Other segment items	19.9	0.0	235.0
Operating income (loss)	212.9	265.2	69.7
Depreciation and amortization	173.7	186.2	187.5
Capital expenditures (excluding acquisitions)	120.3	122.5	156.8
Operating segments | Flooring ROW | Ceramic & Stone
Segment Reporting Information [Line Items]
Net sales	0.0	0.0	0.0
Operating segments | Flooring ROW | Carpet & Resilient
Segment Reporting Information [Line Items]
Net sales	822.8	864.8	893.0
Operating segments | Flooring ROW | Laminate & Wood
Segment Reporting Information [Line Items]
Net sales	956.5	919.4	958.5
Operating segments | Flooring ROW | Other
Segment Reporting Information [Line Items]
Net sales	1,078.2	1,056.2	1,154.1
Operating segments | Flooring ROW | United States
Segment Reporting Information [Line Items]
Net sales	13.8	8.7	6.7
Operating segments | Flooring ROW | Europe
Segment Reporting Information [Line Items]
Net sales	2,190.0	2,131.9	2,304.9
Operating segments | Flooring ROW | Latin America
Segment Reporting Information [Line Items]
Net sales	37.0	37.2	33.7
Corporate and intersegment eliminations
Segment Reporting Information [Line Items]
Assets	710.5	667.4	610.0
Corporate
Segment Reporting Information [Line Items]
Depreciation and amortization	6.7	7.9	8.6
Capital expenditures (excluding acquisitions)	$ 23.1	$ 6.6	$ 13.2