Document And Entity Information - shares	9 Months Ended
	Oct. 31, 2015	Nov. 18, 2015
Document And Entity Information [Abstract]
Entity Registrant Name	CHICOS FAS INC
Entity Central Index Key	0000897429
Current Fiscal Year End Date	--01-30
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Oct. 31, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		139,401,313