Document And Entity Information - USD ($) $ in Millions	12 Months Ended
	Jan. 28, 2017	Feb. 24, 2017	Jul. 30, 2016
Document And Entity Information [Abstract]
Entity Registrant Name	CHICOS FAS INC
Entity Central Index Key	0000897429
Current Fiscal Year End Date	--01-28
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Jan. 28, 2017
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		128,031,928
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 1,557