Average Annual Total Returns - FidelityEmergingMarketsFund-KPRO - FidelityEmergingMarketsFund-KPRO - Fidelity Emerging Markets Fund	Dec. 30, 2023
Fidelity Emerging Markets Fund - Class K \| Return Before Taxes
Average Annual Return:
Past 1 year	(27.42%)
Past 5 years	1.44%
Past 10 years	4.60%
IXYE0
Average Annual Return:
Past 1 year	(20.07%)
Past 5 years	(1.37%)
Past 10 years	1.47%

Return Before Taxes.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form
-Number N-1A
-Chapter A
-Section 4
-Subsection b
-Paragraph 2
-Subparagraph iii
-Clause 1
-Exhibit 2

Name:	rr_AverageAnnualReturnYear01
Namespace Prefix:	rr_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration