v3.25.2
Cover Page - shares
6 Months Ended
Jun. 30, 2025
Aug. 01, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
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 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 Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Small Business Entity false  
Emerging Growth Entity false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   135,350,969
Entity Central Index Key 0000058492  
Current Fiscal Year-End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Amendment Flag false