Document and Entity Information - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Aug. 29, 2026	Oct. 22, 2026	Feb. 23, 2024
Cover [Abstract]
Documents Incorporated by Reference [Text Block]	Certain portions of the registrant’s definitive proxy statement, in connection with its 2027 annual meeting of stockholders, to be filed within 120 days after the end of the fiscal year ended August 29, 2026, are incorporated by reference into Part III of this Annual Report on Form 10‑K.
Document Information [Line Items]
Entity Central Index Key	0001702744
Document Type	10-K
Current Fiscal Year End Date	--08-29
Document Fiscal Year Focus	2026
Document Fiscal Period Focus	FY
Amendment Flag	false
Document Annual Report	true
Document Period End Date	Aug. 29, 2026
Document Transition Report	false
Entity File Number	001-38115
Entity Registrant Name	The Simply Good Foods Company
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	82-1038121
Entity Address, Address Line One	1225 17th Street, Suite 1000
Entity Address, City or Town	Denver
Entity Address, State or Province	CO
Entity Address, Postal Zip Code	80202
City Area Code	303
Local Phone Number	633-2840
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	SMPL
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 1,400
Share price			$ 17.06
Entity Common Stock, Shares Outstanding		86,861,967
Auditor Name	Deloitte & Touche LLP
Auditor Firm ID	34
Auditor Location	Denver, CO