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Cover Page - USD ($)
12 Months Ended
Dec. 31, 2023
Feb. 20, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-07845    
Entity Registrant Name LEGGETT & PLATT, INC    
Entity Incorporation, State or Country Code MO    
Entity Tax Identification Number 44-0324630    
Entity Address, Address Line One No. 1 Leggett Road    
Entity Address, City or Town Carthage,    
Entity Address, State or Province MO    
Entity Address, Postal Zip Code 64836    
City Area Code 417    
Local Phone Number 358-8131    
Title of 12(b) Security Common Stock, $.01 par value    
Trading Symbol LEG    
Security Exchange Name NYSE    
Entity Well Known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction Flag false    
Entity Shell Company false    
Entity Public Float     $ 3,864,089,000
Entity Common Stock, Shares Outstanding   133,730,089  
Documents Incorporated by Reference
Parts of Item 10, and all of Item 11, 12, 13 and 14 of Part III, are incorporated by reference from the Company's definitive Proxy Statement for the Annual Meeting of Shareholders to be held on May 8, 2024.
   
Entity Central Index Key 0000058492    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Amendment Flag false