Document and Entity Information Document	3 Months Ended
	Mar. 31, 2016 shares
Document and Entity Information [Abstract]
Entity Registrant Name	CONVERGYS CORP.
Entity Central Index Key	0001062047
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding	96,482,570
Trading symbol	cvg