Average Annual Total Returns - FidelityOverseasFund-KPRO - FidelityOverseasFund-KPRO - Fidelity Overseas Fund	Dec. 30, 2022
Fidelity Overseas Fund - Class K \| Return Before Taxes
Average Annual Return:
Past 1 year	19.47%
Past 5 years	14.49%
Past 10 years	12.46%
MS001
Average Annual Return:
Past 1 year	11.48%
Past 5 years	9.78%
Past 10 years	8.22%

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