Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Supplement Text Block	abfsmllcpval-20150424_SupplementTextBlock	American Beacon Small Cap Value Fund Supplement dated April 24, 2015 to the Prospectus dated February 27, 2015 The information below supplements the Prospectus dated February 27, 2015 and is in addition to any other supplement(s): American Beacon Small Cap Value Fund In the "Fund Summaries" section in the "Fees and Expenses of the Fund" section of the Fund Summary for the American Beacon Small Cap Value Fund, the header of the second table on page 17 is deleted and replaced with "Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)¹"
(American Beacon Small Cap Value Fund)
Risk/Return:	rr_RiskReturnAbstract
Operating Expenses Caption [Text]	rr_OperatingExpensesCaption	Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)¹

Annual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Form

-Number N-1A

-Chapter A

-Section 3

-Subsection table

-Paragraph 1

-Subparagraph 7

Name:	rr_OperatingExpensesCaption
Namespace Prefix:	rr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration