Label	Element	Value
Ultra Short Income Portfolio
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	Summary Prospectus and Prospectus Supplement May 1, 2024 Morgan Stanley Institutional Fund Trust Supplement dated May 1, 2024 to the Morgan Stanley Institutional Fund Trust Summary Prospectus and Prospectus dated January 28, 2024 Ultra-Short Income Portfolio (the "Fund") Effective immediately, in accordance with regulatory changes requiring the Fund's primary benchmark to represent the overall applicable market, the Fund's primary prospectus benchmark changed as follows: The Fund's primary benchmark is now the Bloomberg U.S. Universal Index. References to other benchmark indexes in the Fund's prospectus remain in effect except that references to any Lipper Index are deleted effective immediately. These additional index(es) provide a means to compare a Fund's average annual returns to a benchmark that the Adviser believes is representative of the Fund's investment universe.
Risk/Return [Heading]	rr_RiskReturnHeading	Ultra-Short Income Portfolio

This element contains the text of a prospectus supplement (submission type 497) not already contained in an element containing amended text or other data from a previous submission.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A

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