Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Feb. 02, 2019	Mar. 04, 2019	Aug. 04, 2018
Document And Entity Information [Abstract]
Entity Registrant Name	CHICOS FAS INC
Entity Central Index Key	0000897429
Current Fiscal Year End Date	--02-02
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Feb. 02, 2019
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		116,497,167
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 1,130