XML 18 R1.htm IDEA: XBRL DOCUMENT v3.20.4
Cover Page - USD ($)
 12 Months Ended
Jan. 31, 2021
Mar. 17, 2021
Jul. 31, 2020
Document Type 10-K    
Document Annual Report true    
Document Period End Date Jan. 31, 2021    
Current Fiscal Year End Date --01-31    
Document Transition Report false    
Entity File Number 001-06991    
Entity Registrant Name WALMART INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 71-0415188    
Entity Address, Address Line One 702 S.W. 8th Street    
Entity Address, Postal Zip Code 72716    
Entity Address, City or Town Bentonville,    
Entity Address, State or Province AR    
City Area Code 479    
Local Phone Number 273-4000    
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    
Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 182,886,052,366
Entity Common Stock, Shares Outstanding   2,817,071,695  
Documents Incorporated by Reference
Document  Parts Into Which Incorporated
Portions of the registrant's Proxy Statement for the Annual Meeting of Shareholders to be held June 2, 2021 (the "Proxy Statement")  Part III
    
Entity Central Index Key 0000104169    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Amendment Flag false    
Common Stock, par value $0.10 per share [Member]      
Title of 12(b) Security Common Stock, par value $0.10 per share    
Trading Symbol WMT    
Security Exchange Name NYSE    
1.900% Notes Due 2022 [Member]      
Title of 12(b) Security 1.900% Notes Due 2022    
Trading Symbol WMT22    
Security Exchange Name NYSE    
2.550% Notes Due 2026 [Member]      
Title of 12(b) Security 2.550% Notes Due 2026    
Trading Symbol WMT26    
Security Exchange Name NYSE