Document and Entity Information	6 Months Ended
	May 31, 2012
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	May 31, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q2
Trading Symbol	OMN
Entity Registrant Name	OMNOVA SOLUTIONS INC
Entity Central Index Key	0001090061
Current Fiscal Year End Date	--11-30
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding	46,605,870