Cover Page - shares	3 Months Ended
	May 02, 2020	Jun. 01, 2020
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	May 02, 2020
Document Transition Report	false
Entity File Number	001-16435
Entity Registrant Name	Chico's FAS, Inc.
Entity Incorporation, State or Country Code	FL
Entity Tax Identification Number	59-2389435
Entity Address, Address Line One	11215 Metro Parkway
Entity Address, City or Town	Fort Myers
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	33966
City Area Code	239
Local Phone Number	277-6200
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		119,566,151
Amendment Flag	false
Entity Central Index Key	0000897429
Current Fiscal Year End Date	--02-01
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common Stock, Par Value $0.01 Per Share
Trading Symbol	CHS
Security Exchange Name	NYSE
Preferred Stock Purchase Rights
Document Information [Line Items]
Title of 12(b) Security	Series A Junior Participating Preferred Stock Purchase Rights
Trading Symbol	CHS
Security Exchange Name	NYSE