Goodwill and Other Intangible Assets - Schedule of Carrying Amount and Accumulated Amortization of Identifiable Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	May 01, 2021	Jan. 30, 2021	May 02, 2020
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 375.5	$ 377.2	$ 382.4
Accumulated Amortization	(69.6)		(62.7)
Total intangible assets	445.1		445.1
JOANN Trade Name
Finite Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets, Gross Carrying Amount	325.0		325.0
Joann.com Domain Name
Finite Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets, Gross Carrying Amount	$ 10.0		10.0
Creativebug Trade Name
Finite Lived Intangible Assets [Line Items]
Estimated Life in Years	10 years
Gross Carrying Amount	$ 0.1		0.1
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Estimated Life in Years	16 years
Gross Carrying Amount	$ 110.0		110.0
Accumulated Amortization	$ (69.6)		$ (62.7)