v3.25.2
Document and Entity Information
Jun. 25, 2025
Document And Entity Information [Line Items]  
Amendment Flag false
Entity Central Index Key 0000055067
Document Type 8-K
Document Period End Date Jun. 25, 2025
Entity Registrant Name Kellanova
Entity Incorporation State Country Code DE
Entity File Number 1-4171
Entity Tax Identification Number 38-0710690
Entity Address, Address Line One 412 N. Wells Street
Entity Address, City or Town Chicago
Entity Address, State or Province IL
Entity Address, Postal Zip Code 60654
City Area Code (269)
Local Phone Number 961-2000
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Common Stock [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Common Stock, $.25 par value per share
Trading Symbol K
Security Exchange Name NYSE
A 0500 Senior Notes Due 2029 [Member]  
Document And Entity Information [Line Items]  
Security 12b Title 0.500% Senior Notes due 2029
Trading Symbol K29
Security Exchange Name NYSE
Three Seven Five Zero Percent Euro Notes Due Twenty Thirty Four [Member]  
Document And Entity Information [Line Items]  
Security 12b Title 3.750% Senior Notes due 2034
Trading Symbol K34
Security Exchange Name NYSE