CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net earnings	$ 90.4	$ 87.5
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(8.8)	(14.3)
Cash flow hedges	1.0	1.1
Defined benefit pension plans	0.9	0.8
Other comprehensive income (loss)	(6.9)	(12.4)
Comprehensive income (loss)	83.5	75.1
Add: comprehensive loss attributable to noncontrolling interest	0.0	0.0
Comprehensive income (loss) attributable to Leggett & Platt, Inc.	$ 83.5	$ 75.1