Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net earnings (loss)	$ 235.4	$ (511.4)	$ (136.8)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	88.9	(73.2)	40.9
Cash flow hedges	4.4	(5.3)	4.1
Defined benefit pension plans	13.5	6.4	4.8
Other comprehensive income (loss), net of tax	106.8	(72.1)	49.8
Comprehensive income (loss)	342.2	(583.5)	(87.0)
Less: comprehensive income attributable to noncontrolling interest	0.0	(0.1)	0.0
Comprehensive income (loss) attributable to Leggett & Platt, Inc.	$ 342.2	$ (583.6)	$ (87.0)