Document And Entity Information	6 Months Ended
	Jun. 30, 2011	Jul. 25, 2011
Document And Entity Information
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q2
Trading Symbol	leg
Entity Registrant Name	LEGGETT & PLATT INC
Entity Central Index Key	0000058492
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		141,582,977