Document and Entity Information - shares	9 Months Ended
	Dec. 31, 2018	Feb. 01, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Trading Symbol	CSS
Entity Registrant Name	CSS INDUSTRIES INC
Entity Central Index Key	0000020629
Current Fiscal Year End Date	--03-31
Entity Filer Category	Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Common Stock, Shares Outstanding		8,835,900