Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	FIDELITY INVESTMENT TRUST
Prospectus Date	rr_ProspectusDate	Dec. 30, 2013
Inst \| Fidelity Emerging Markets Discovery Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement [Text Block]	fit_SupplementTextBlock	Supplement to the Fidelity Advisor^® Emerging Markets Discovery Fund Institutional Class December 30, 2013 Prospectus The following information replaces similar information for found in the "Fund Summary" section under the heading "Principal Investment Strategies" on page 4. Allocating the fund's assets across emerging markets sectors, using different Fidelity managers.

The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.

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

-Publisher SEC

-Name Regulation 12B

-Number 240

-Section 12b

-Subsection 1

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Namespace Prefix:	dei_
Data Type:	xbrli:normalizedStringItemType
Balance Type:	na
Period Type:	duration