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Label Element Value
Prospectus [Line Items] rr_ProspectusLineItems  
Document Type dei_DocumentType 497
Document Period End Date dei_DocumentPeriodEndDate Oct. 31, 2020
Entity Registrant Name dei_EntityRegistrantName AMERICAN BEACON FUNDS
Entity Central Index Key dei_EntityCentralIndexKey 0000809593
Entity Inv Company Type dei_EntityInvCompanyType N-1A
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Nov. 13, 2020
Document Effective Date dei_DocumentEffectiveDate Nov. 13, 2020
Prospectus Date rr_ProspectusDate Feb. 28, 2020
American Beacon Small Cap Value Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock

 

American Beacon Small Cap Value Fund

 

Supplement dated

November 13, 2020 to the

Prospectus, Summary Prospectus, and Statement of Additional Information,

each dated February 28, 2020, as previously amended or supplemented

 

Effective December 31, 2020, John P. Harloe of Barrow, Hanley, Mewhinney & Strauss, LLC will no longer serve as a portfolio manager for the American Beacon Small Cap Value Fund. Accordingly, effective December 31, 2020, all references to Mr. Harloe in the Prospectus, Summary Prospectus, and Statement of Additional Information are deleted.