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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2022
Feb. 27, 2023
Jul. 15, 2022
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2022    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY    
Entity Registrant Name SPARTANNASH COMPANY    
Entity Central Index Key 0000877422    
Current Fiscal Year End Date --12-31    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Common Stock, Shares Outstanding   35,061,566  
Entity Public Float     $ 1,119,947,910
Entity Shell Company false    
Entity Well Known Seasoned Issuer Yes    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
ICFR Auditor Attestation Flag true    
Entity File Number 000-31127    
Entity Tax Identification Number 38-0593940    
Entity Address, Address Line One 850 76th Street, S.W.    
Entity Address, Address Line Two P.O. Box 8700    
Entity Address, City or Town Grand Rapids    
Entity Address, State or Province MI    
Entity Address, Postal Zip Code 49518-8700    
City Area Code 616    
Local Phone Number 878-2000    
Document Annual Report true    
Document Transition Report false    
Entity Incorporation, State or Country Code MI    
Entity Interactive Data Current Yes    
Auditor Name DELOITTE & TOUCHE LLP    
Auditor Firm ID 34    
Auditor Location Grand Rapids, Michigan    
Documents Incorporated by Reference

 

Part III, Items 10, 11, 12, 13 and 14

 

Definitive Proxy Statement for the 2023 Annual Meeting