CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Net trade sales	$ 1,294.4	$ 1,319.2	$ 3,950.9	$ 3,739.7
Cost of goods sold	1,063.9	1,063.1	3,184.7	2,966.8
Gross profit	230.5	256.1	766.2	772.9
Selling and administrative expenses	100.4	103.6	317.5	322.5
Amortization of intangibles	16.6	17.8	50.0	51.6
Net gain from sale of assets and businesses	(0.3)	(0.9)	(1.6)	(29.5)
Other expense (income), net	0.6	(8.6)	6.5	(15.5)
Earnings before interest and income taxes	113.2	144.2	393.8	443.8
Interest expense	20.5	19.0	62.3	57.8
Interest income	0.8	0.6	3.1	2.3
Earnings before income taxes	93.5	125.8	334.6	388.3
Income taxes	22.0	28.6	77.5	91.3
Net earnings	71.5	97.2	257.1	297.0
(Earnings) attributable to noncontrolling interest, net of tax	(0.1)	0.0	(0.1)	(0.1)
Net earnings attributable to Leggett & Platt, Inc. common shareholders	$ 71.4	$ 97.2	$ 257.0	$ 296.9
Net earnings per share attributable to Leggett & Platt, Inc. common shareholders
Basic (in usd per share)	$ 0.53	$ 0.71	$ 1.89	$ 2.18
Diluted (in usd per share)	$ 0.52	$ 0.71	$ 1.88	$ 2.17
Weighted average shares outstanding
Basic (in shares)	135.7	136.4	136.2	136.2
Diluted (in shares)	136.1	136.9	136.6	136.7