Goodwill and Other Intangible Assets - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Flooring ROW
Goodwill [Line Items]
Intangible assets impaired	$ (19.9)
Impairment, intangible asset, indefinite-lived (excluding goodwill), statement of income or comprehensive income [Extensible Enumeration]	Impairment of goodwill and indefinite-lived intangibles
Impairment of intangible assets net of tax	$ 14.9
Global Ceramic
Goodwill [Line Items]
Intangible assets impaired		$ 8.2
Impairment of intangible assets net of tax		$ 6.3