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Shareholder Report, Line Graph (Details) - USD ($)
 12 Months Ended 36 Months Ended 48 Months Ended 84 Months Ended 96 Months Ended 108 Months Ended 132 Months Ended
Oct. 31, 2025
Oct. 31, 2025
Oct. 31, 2025
Oct. 31, 2025
Oct. 31, 2025
Oct. 31, 2025
Oct. 31, 2025
C000205035_LG_ClassMember_8YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class Z</span>    
C000205035_ClassMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value $ 10,000            
C000205035_ClassMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 9,003            
C000205035_ClassMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 9,005            
C000205035_ClassMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 8,286            
C000205035_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 12,767            
C000205035_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 15,796            
C000205035_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 14,327            
C000205035_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 16,134            
C000205035_LG_1_AdditionalIndexMember_8YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI ACWI (All Country World Index) Commodity Producers Sector Capped Index</span>    
C000205035_1_AdditionalIndexMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000205035_1_AdditionalIndexMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 9,089            
C000205035_1_AdditionalIndexMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 8,789            
C000205035_1_AdditionalIndexMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 7,500            
C000205035_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 11,735            
C000205035_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 13,197            
C000205035_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 12,843            
C000205035_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 13,596            
C000205035_LG_2_AdditionalIndexMember_8YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI ACWI (All Country World Index) Index</span>    
C000205035_2_AdditionalIndexMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000205035_2_AdditionalIndexMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 9,268            
C000205035_2_AdditionalIndexMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 10,478            
C000205035_2_AdditionalIndexMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 11,032            
C000205035_2_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 15,191            
C000205035_2_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 12,201            
C000205035_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 13,531            
C000205035_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 18,028            
C000071918_LG_ClassMember_11YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class I</span>
C000071918_ClassMember_AsOf_2015Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000071918_ClassMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 10,963            
C000071918_ClassMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 13,044            
C000071918_ClassMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 13,083            
C000071918_ClassMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 13,076            
C000071918_ClassMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 12,016            
C000071918_ClassMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 18,500            
C000071918_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 22,860            
C000071918_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 20,705            
C000071918_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 23,282            
C000071918_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 26,646            
C000071918_LG_1_AdditionalIndexMember_11YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI ACWI (All Country World Index) Commodity Producers Sector Capped Index</span>
C000071918_1_AdditionalIndexMember_AsOf_2015Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000071918_1_AdditionalIndexMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 11,142            
C000071918_1_AdditionalIndexMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 13,428            
C000071918_1_AdditionalIndexMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 13,646            
C000071918_1_AdditionalIndexMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 13,195            
C000071918_1_AdditionalIndexMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 11,260            
C000071918_1_AdditionalIndexMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 17,618            
C000071918_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 19,812            
C000071918_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 19,281            
C000071918_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 20,411            
C000071918_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 23,332            
C000071918_LG_2_AdditionalIndexMember_11YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI ACWI (All Country World Index) Index</span>
C000071918_2_AdditionalIndexMember_AsOf_2015Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000071918_2_AdditionalIndexMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 10,248            
C000071918_2_AdditionalIndexMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 12,676            
C000071918_2_AdditionalIndexMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 12,658            
C000071918_2_AdditionalIndexMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 14,311            
C000071918_2_AdditionalIndexMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 15,068            
C000071918_2_AdditionalIndexMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 20,749            
C000071918_2_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 16,664            
C000071918_2_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 18,482            
C000071918_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 24,624            
C000071918_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 30,294            
C000080864_LG_ClassMember_11YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Series International Value Fund</span>
C000080864_ClassMember_AsOf_2015Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000080864_ClassMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 9,551            
C000080864_ClassMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 11,493            
C000080864_ClassMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 10,561            
C000080864_ClassMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 11,140            
C000080864_ClassMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 9,742            
C000080864_ClassMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 14,121            
C000080864_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 11,805            
C000080864_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 14,047            
C000080864_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 17,586            
C000080864_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 23,407            
C000080864_LG_1_AdditionalIndexMember_11YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI EAFE Value Index</span>
C000080864_1_AdditionalIndexMember_AsOf_2015Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000080864_1_AdditionalIndexMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 9,690            
C000080864_1_AdditionalIndexMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 11,967            
C000080864_1_AdditionalIndexMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 11,074            
C000080864_1_AdditionalIndexMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 11,716            
C000080864_1_AdditionalIndexMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 9,580            
C000080864_1_AdditionalIndexMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 13,285            
C000080864_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 11,143            
C000080864_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 13,198            
C000080864_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 16,252            
C000080864_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 21,136            
C000080864_LG_2_AdditionalIndexMember_11YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI EAFE Index</span>
C000080864_2_AdditionalIndexMember_AsOf_2015Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000080864_2_AdditionalIndexMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 9,697            
C000080864_2_AdditionalIndexMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 11,994            
C000080864_2_AdditionalIndexMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 11,197            
C000080864_2_AdditionalIndexMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 12,462            
C000080864_2_AdditionalIndexMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 11,629            
C000080864_2_AdditionalIndexMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 15,635            
C000080864_2_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 12,063            
C000080864_2_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 13,831            
C000080864_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 17,046            
C000080864_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 21,031            
C000080866_LG_ClassMember_11YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Series International Small Cap Fund</span>
C000080866_ClassMember_AsOf_2015Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000080866_ClassMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 10,002            
C000080866_ClassMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 12,589            
C000080866_ClassMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 12,121            
C000080866_ClassMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 13,668            
C000080866_ClassMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 14,980            
C000080866_ClassMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 20,763            
C000080866_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 14,156            
C000080866_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 15,086            
C000080866_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 19,197            
C000080866_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 23,676            
C000080866_LG_1_AdditionalIndexMember_11YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI EAFE Small Cap Index</span>
C000080866_1_AdditionalIndexMember_AsOf_2015Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000080866_1_AdditionalIndexMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 10,312            
C000080866_1_AdditionalIndexMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 13,169            
C000080866_1_AdditionalIndexMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 12,158            
C000080866_1_AdditionalIndexMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 13,252            
C000080866_1_AdditionalIndexMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 13,090            
C000080866_1_AdditionalIndexMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 17,798            
C000080866_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 12,431            
C000080866_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 13,260            
C000080866_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 16,336            
C000080866_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 20,385            
C000080866_LG_2_AdditionalIndexMember_11YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI EAFE Index</span>
C000080866_2_AdditionalIndexMember_AsOf_2015Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000080866_2_AdditionalIndexMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 9,697            
C000080866_2_AdditionalIndexMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 11,994            
C000080866_2_AdditionalIndexMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 11,197            
C000080866_2_AdditionalIndexMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 12,462            
C000080866_2_AdditionalIndexMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 11,629            
C000080866_2_AdditionalIndexMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 15,635            
C000080866_2_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 12,063            
C000080866_2_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 13,831            
C000080866_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 17,046            
C000080866_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 21,031            
C000069437_LG_ClassMember_11YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Series Emerging Markets Opportunities Fund</span>
C000069437_ClassMember_AsOf_2015Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000069437_ClassMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 11,102            
C000069437_ClassMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 14,326            
C000069437_ClassMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 12,203            
C000069437_ClassMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 14,660            
C000069437_ClassMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 16,664            
C000069437_ClassMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 19,736            
C000069437_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 12,763            
C000069437_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 14,602            
C000069437_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 18,394            
C000069437_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 24,100            
C000069437_LG_1_AdditionalIndexMember_11YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI Emerging Markets Index</span>
C000069437_1_AdditionalIndexMember_AsOf_2015Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000069437_1_AdditionalIndexMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 10,931            
C000069437_1_AdditionalIndexMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 13,827            
C000069437_1_AdditionalIndexMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 12,101            
C000069437_1_AdditionalIndexMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 13,540            
C000069437_1_AdditionalIndexMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 14,660            
C000069437_1_AdditionalIndexMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 17,148            
C000069437_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 11,830            
C000069437_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 13,112            
C000069437_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 16,433            
C000069437_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 21,015            
C000211072_LG_ClassMember_7YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® SAI International SMA Completion Fund</span>      
C000211072_ClassMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000211072_ClassMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 10,470            
C000211072_ClassMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 12,415            
C000211072_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 15,646            
C000211072_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 10,313            
C000211072_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 10,994            
C000211072_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 13,517            
C000211072_LG_1_AdditionalIndexMember_7YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI EAFE Index</span>      
C000211072_1_AdditionalIndexMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000211072_1_AdditionalIndexMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 10,437            
C000211072_1_AdditionalIndexMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 9,739            
C000211072_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 13,094            
C000211072_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 10,103            
C000211072_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 11,583            
C000211072_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 14,276            
C000212505_LG_ClassMember_7YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Series Overseas Fund</span>      
C000212505_ClassMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000212505_ClassMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 10,200            
C000212505_ClassMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 10,660            
C000212505_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 14,805            
C000212505_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 10,562            
C000212505_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 12,046            
C000212505_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 15,208            
C000212505_LG_1_AdditionalIndexMember_7YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI EAFE Index</span>      
C000212505_1_AdditionalIndexMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000212505_1_AdditionalIndexMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 10,320            
C000212505_1_AdditionalIndexMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 9,630            
C000212505_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 12,947            
C000212505_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 9,989            
C000212505_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 11,453            
C000212505_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 14,115            
C000234208_LG_ClassMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class C</span>        
C000234208_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234208_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 7,160            
C000234208_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 7,780            
C000234208_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 9,694            
C000234208_LG_1_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI EAFE ESG Leaders</span>        
C000234208_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234208_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 7,669            
C000234208_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 8,792            
C000234208_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 10,737            
C000234208_LG_2_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI EAFE Index</span>        
C000234208_2_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234208_2_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 7,820            
C000234208_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 8,966            
C000234208_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 11,050            
C000242615_LG_ClassMember_3YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Series Sustainable Non-U.S. Developed Markets Fund</span>          
C000242615_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000242615_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 9,340            
C000242615_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 11,713            
C000242615_LG_1_AdditionalIndexMember_3YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI World ex USA ESG Focus Index</span>          
C000242615_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000242615_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 9,188            
C000242615_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 11,372            
C000242615_LG_2_AdditionalIndexMember_3YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI World ex USA Index</span>          
C000242615_2_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000242615_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 9,244            
C000242615_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 11,474            
C000234202_LG_ClassMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class C</span>        
C000234202_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234202_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 6,520            
C000234202_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 7,300            
C000234202_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 9,104            
C000234202_LG_1_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI Emerging Markets (EM) ESG Leaders Index</span>        
C000234202_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234202_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 6,534            
C000234202_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 7,249            
C000234202_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 9,315            
C000234202_LG_2_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI Emerging Markets Index</span>        
C000234202_2_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234202_2_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 6,946            
C000234202_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 7,699            
C000234202_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 9,649            
C000234201_LG_ClassMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class M</span>        
C000234201_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 9,650            
C000234201_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 6,311            
C000234201_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 7,110            
C000234201_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 8,900            
C000234201_LG_1_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI Emerging Markets (EM) ESG Leaders Index</span>        
C000234201_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234201_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 6,534            
C000234201_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 7,249            
C000234201_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 9,315            
C000234201_LG_2_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI Emerging Markets Index</span>        
C000234201_2_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234201_2_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 6,946            
C000234201_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 7,699            
C000234201_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 9,649            
C000234211_LG_ClassMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Sustainable International Equity Fund</span>        
C000234211_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234211_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 7,210            
C000234211_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 7,912            
C000234211_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 9,968            
C000234211_LG_1_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI EAFE ESG Leaders</span>        
C000234211_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234211_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 7,669            
C000234211_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 8,792            
C000234211_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 10,737            
C000234211_LG_2_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI EAFE Index</span>        
C000234211_2_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234211_2_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 7,820            
C000234211_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 8,966            
C000234211_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 11,050            
C000234203_LG_ClassMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class I</span>        
C000234203_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234203_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 6,570            
C000234203_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 7,431            
C000234203_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 9,351            
C000234203_LG_1_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI Emerging Markets (EM) ESG Leaders Index</span>        
C000234203_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234203_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 6,534            
C000234203_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 7,249            
C000234203_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 9,315            
C000234203_LG_2_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI Emerging Markets Index</span>        
C000234203_2_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234203_2_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 6,946            
C000234203_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 7,699            
C000234203_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 9,649            
C000234206_LG_ClassMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class A</span>        
C000234206_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 9,425            
C000234206_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 6,173            
C000234206_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 6,972            
C000234206_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 8,755            
C000234206_LG_1_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI Emerging Markets (EM) ESG Leaders Index</span>        
C000234206_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234206_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 6,534            
C000234206_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 7,249            
C000234206_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 9,315            
C000234206_LG_2_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI Emerging Markets Index</span>        
C000234206_2_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234206_2_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 6,946            
C000234206_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 7,699            
C000234206_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 9,649            
C000235237_LG_ClassMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® <span> </span>SAI Sustainable International Equity Fund</span>        
C000235237_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000235237_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 8,060            
C000235237_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 8,875            
C000235237_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 11,133            
C000235237_LG_1_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI EAFE ESG Leaders</span>        
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Account Value [Line Items]              
Accumulated Value 10,000            
C000235237_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 8,296            
C000235237_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 9,511            
C000235237_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 11,615            
C000235237_LG_2_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI EAFE Index</span>        
C000235237_2_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000235237_2_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 8,407            
C000235237_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 9,638            
C000235237_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 11,879            
C000071916_LG_ClassMember_11YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class C</span>
C000071916_ClassMember_AsOf_2015Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000071916_ClassMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 10,846            
C000071916_ClassMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 12,754            
C000071916_ClassMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 12,668            
C000071916_ClassMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 12,521            
C000071916_ClassMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 11,380            
C000071916_ClassMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 17,333            
C000071916_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 21,205            
C000071916_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 19,013            
C000071916_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 21,319            
C000071916_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 24,337            
C000071916_LG_1_AdditionalIndexMember_11YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI ACWI (All Country World Index) Commodity Producers Sector Capped Index</span>
C000071916_1_AdditionalIndexMember_AsOf_2015Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000071916_1_AdditionalIndexMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 11,142            
C000071916_1_AdditionalIndexMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 13,428            
C000071916_1_AdditionalIndexMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 13,646            
C000071916_1_AdditionalIndexMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 13,195            
C000071916_1_AdditionalIndexMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 11,260            
C000071916_1_AdditionalIndexMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 17,618            
C000071916_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 19,812            
C000071916_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 19,281            
C000071916_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 20,411            
C000071916_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 23,332            
C000071916_LG_2_AdditionalIndexMember_11YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI ACWI (All Country World Index) Index</span>
C000071916_2_AdditionalIndexMember_AsOf_2015Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000071916_2_AdditionalIndexMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 10,248            
C000071916_2_AdditionalIndexMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 12,676            
C000071916_2_AdditionalIndexMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 12,658            
C000071916_2_AdditionalIndexMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 14,311            
C000071916_2_AdditionalIndexMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 15,068            
C000071916_2_AdditionalIndexMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 20,749            
C000071916_2_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 16,664            
C000071916_2_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 18,482            
C000071916_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 24,624            
C000071916_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 30,294            
C000242614_LG_ClassMember_3YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Series Sustainable Emerging Markets Fund</span>          
C000242614_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000242614_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 9,620            
C000242614_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 11,878            
C000242614_LG_1_AdditionalIndexMember_3YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI Emerging Markets ESG Focus Index</span>          
C000242614_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000242614_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 9,561            
C000242614_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 11,815            
C000242614_LG_2_AdditionalIndexMember_3YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name   <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI Emerging Markets Index</span>          
C000242614_2_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000242614_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 9,509            
C000242614_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 11,917            
C000234204_LG_ClassMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class Z</span>        
C000234204_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234204_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 6,570            
C000234204_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 7,452            
C000234204_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 9,392            
C000234204_LG_1_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI Emerging Markets (EM) ESG Leaders Index</span>        
C000234204_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234204_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 6,534            
C000234204_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 7,249            
C000234204_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 9,315            
C000234204_LG_2_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI Emerging Markets Index</span>        
C000234204_2_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234204_2_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 6,946            
C000234204_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 7,699            
C000234204_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 9,649            
C000234212_LG_ClassMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class A</span>        
C000234212_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 9,425            
C000234212_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 6,786            
C000234212_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 7,426            
C000234212_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 9,335            
C000234212_LG_1_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI EAFE ESG Leaders</span>        
C000234212_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234212_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 7,669            
C000234212_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 8,792            
C000234212_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 10,737            
C000234212_LG_2_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI EAFE Index</span>        
C000234212_2_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234212_2_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 7,820            
C000234212_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 8,966            
C000234212_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 11,050            
C000203452_LG_ClassMember_8YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Series Emerging Markets Fund</span>    
C000203452_ClassMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000203452_ClassMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 8,870            
C000203452_ClassMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 9,520            
C000203452_ClassMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 9,916            
C000203452_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 11,788            
C000203452_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 7,482            
C000203452_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 8,532            
C000203452_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 10,632            
C000203452_LG_1_AdditionalIndexMember_8YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name         <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI Emerging Markets Index</span>    
C000203452_1_AdditionalIndexMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000203452_1_AdditionalIndexMember_AsOf_2019Member              
Account Value [Line Items]              
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Account Value [Line Items]              
Accumulated Value 9,709            
C000203452_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
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Account Value [Line Items]              
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Series Canada Fund</span>  
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Account Value [Line Items]              
Accumulated Value 10,000            
C000191329_ClassMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 10,660            
C000191329_ClassMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 10,100            
C000191329_ClassMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 11,273            
C000191329_ClassMember_AsOf_2021Member              
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Accumulated Value 10,346            
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Accumulated Value 14,784            
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Account Value [Line Items]              
Accumulated Value 15,011            
C000191329_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 19,122            
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Account Value [Line Items]              
Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI Canada Index</span>  
C000191329_1_AdditionalIndexMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000191329_1_AdditionalIndexMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 10,602            
C000191329_1_AdditionalIndexMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 10,012            
C000191329_1_AdditionalIndexMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 11,195            
C000191329_1_AdditionalIndexMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 10,553            
C000191329_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 15,773            
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Account Value [Line Items]              
Accumulated Value 13,617            
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Account Value [Line Items]              
Accumulated Value 13,495            
C000191329_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 17,759            
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Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class A</span>
C000071914_ClassMember_AsOf_2015Member              
Account Value [Line Items]              
Accumulated Value 9,425            
C000071914_ClassMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 10,301            
C000071914_ClassMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 12,210            
C000071914_ClassMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 12,204            
C000071914_ClassMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 12,151            
C000071914_ClassMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 11,131            
C000071914_ClassMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 17,073            
C000071914_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 21,045            
C000071914_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 19,016            
C000071914_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 21,323            
C000071914_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 24,341            
C000071914_LG_1_AdditionalIndexMember_11YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI ACWI (All Country World Index) Commodity Producers Sector Capped Index</span>
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Account Value [Line Items]              
Accumulated Value 10,000            
C000071914_1_AdditionalIndexMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 11,142            
C000071914_1_AdditionalIndexMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 13,428            
C000071914_1_AdditionalIndexMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 13,646            
C000071914_1_AdditionalIndexMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 13,195            
C000071914_1_AdditionalIndexMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 11,260            
C000071914_1_AdditionalIndexMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 17,618            
C000071914_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 19,812            
C000071914_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 19,281            
C000071914_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 20,411            
C000071914_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 23,332            
C000071914_LG_2_AdditionalIndexMember_11YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI ACWI (All Country World Index) Index</span>
C000071914_2_AdditionalIndexMember_AsOf_2015Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000071914_2_AdditionalIndexMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 10,248            
C000071914_2_AdditionalIndexMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 12,676            
C000071914_2_AdditionalIndexMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 12,658            
C000071914_2_AdditionalIndexMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 14,311            
C000071914_2_AdditionalIndexMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 15,068            
C000071914_2_AdditionalIndexMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 20,749            
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Account Value [Line Items]              
Accumulated Value 16,664            
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Account Value [Line Items]              
Accumulated Value 18,482            
C000071914_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 24,624            
C000071914_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 30,294            
C000234205_LG_ClassMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Sustainable Emerging Markets Equity Fund</span>        
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Account Value [Line Items]              
Accumulated Value 10,000            
C000234205_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 6,570            
C000234205_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 7,431            
C000234205_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 9,351            
C000234205_LG_1_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI Emerging Markets (EM) ESG Leaders Index</span>        
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Account Value [Line Items]              
Accumulated Value 10,000            
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Account Value [Line Items]              
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Account Value [Line Items]              
Accumulated Value 7,249            
C000234205_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 9,315            
C000234205_LG_2_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI Emerging Markets Index</span>        
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Account Value [Line Items]              
Accumulated Value 10,000            
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Account Value [Line Items]              
Accumulated Value 6,946            
C000234205_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 7,699            
C000234205_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 9,649            
C000234210_LG_ClassMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class Z</span>        
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Account Value [Line Items]              
Accumulated Value 10,000            
C000234210_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 7,220            
C000234210_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 7,932            
C000234210_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 10,008            
C000234210_LG_1_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI EAFE ESG Leaders</span>        
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Account Value [Line Items]              
Accumulated Value 10,000            
C000234210_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 7,669            
C000234210_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 8,792            
C000234210_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 10,737            
C000234210_LG_2_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI EAFE Index</span>        
C000234210_2_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234210_2_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 7,820            
C000234210_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 8,966            
C000234210_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 11,050            
C000080862_LG_ClassMember_11YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Series International Growth Fund</span>
C000080862_ClassMember_AsOf_2015Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000080862_ClassMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 9,690            
C000080862_ClassMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 12,056            
C000080862_ClassMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 11,475            
C000080862_ClassMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 14,066            
C000080862_ClassMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 15,387            
C000080862_ClassMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 20,481            
C000080862_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 14,889            
C000080862_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 16,572            
C000080862_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 20,923            
C000080862_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 24,693            
C000080862_LG_1_AdditionalIndexMember_11YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI EAFE Growth Index</span>
C000080862_1_AdditionalIndexMember_AsOf_2015Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000080862_1_AdditionalIndexMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 9,693            
C000080862_1_AdditionalIndexMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 12,003            
C000080862_1_AdditionalIndexMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 11,299            
C000080862_1_AdditionalIndexMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 13,201            
C000080862_1_AdditionalIndexMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 13,906            
C000080862_1_AdditionalIndexMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 18,102            
C000080862_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 12,765            
C000080862_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 14,163            
C000080862_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 17,485            
C000080862_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 20,438            
C000080862_LG_2_AdditionalIndexMember_11YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI EAFE Index</span>
C000080862_2_AdditionalIndexMember_AsOf_2015Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000080862_2_AdditionalIndexMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 9,697            
C000080862_2_AdditionalIndexMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 11,994            
C000080862_2_AdditionalIndexMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 11,197            
C000080862_2_AdditionalIndexMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 12,462            
C000080862_2_AdditionalIndexMember_AsOf_2020Member              
Account Value [Line Items]              
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C000080862_2_AdditionalIndexMember_AsOf_2021Member              
Account Value [Line Items]              
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Account Value [Line Items]              
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Account Value [Line Items]              
Accumulated Value 13,831            
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Account Value [Line Items]              
Accumulated Value 17,046            
C000080862_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 21,031            
C000235236_LG_ClassMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® SAI Sustainable Emerging Markets Equity Fund</span>        
C000235236_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000235236_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 7,600            
C000235236_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 8,644            
C000235236_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 10,815            
C000235236_LG_1_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI Emerging Markets (EM) ESG Leaders Index</span>        
C000235236_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000235236_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 7,416            
C000235236_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 8,227            
C000235236_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 10,572            
C000235236_LG_2_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI Emerging Markets Index</span>        
C000235236_2_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000235236_2_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 7,742            
C000235236_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 8,581            
C000235236_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 10,754            
C000238445_LG_ClassMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Series Select International Small Cap Fund</span>        
C000238445_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000238445_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 10,803            
C000238445_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 12,809            
C000238445_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 15,667            
C000238445_LG_1_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI EAFE Small Cap Index</span>        
C000238445_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000238445_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 10,593            
C000238445_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 13,051            
C000238445_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 16,286            
C000238445_LG_2_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI EAFE Index</span>        
C000238445_2_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000238445_2_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 11,332            
C000238445_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 13,967            
C000238445_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 17,232            
C000215141_LG_ClassMember_7YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Infrastructure Fund</span>      
C000215141_ClassMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000215141_ClassMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 10,479            
C000215141_ClassMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 12,780            
C000215141_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 11,509            
C000215141_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 11,229            
C000215141_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 14,725            
C000215141_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 19,102            
C000215141_LG_1_AdditionalIndexMember_7YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P® Global Infrastructure Index</span>      
C000215141_1_AdditionalIndexMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000215141_1_AdditionalIndexMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 8,403            
C000215141_1_AdditionalIndexMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 10,830            
C000215141_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,324            
C000215141_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 10,189            
C000215141_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 13,577            
C000215141_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 16,018            
C000215141_LG_2_AdditionalIndexMember_7YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI ACWI (All Country World Index) Index</span>      
C000215141_2_AdditionalIndexMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000215141_2_AdditionalIndexMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 10,388            
C000215141_2_AdditionalIndexMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 14,305            
C000215141_2_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 11,489            
C000215141_2_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 12,742            
C000215141_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 16,976            
C000215141_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 20,885            
C000234209_LG_ClassMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class I</span>        
C000234209_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234209_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 7,210            
C000234209_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 7,912            
C000234209_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 9,968            
C000234209_LG_1_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI EAFE ESG Leaders</span>        
C000234209_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234209_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 7,669            
C000234209_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 8,792            
C000234209_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 10,737            
C000234209_LG_2_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI EAFE Index</span>        
C000234209_2_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234209_2_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 7,820            
C000234209_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 8,966            
C000234209_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 11,050            
C000071917_LG_ClassMember_11YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class M</span>
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Account Value [Line Items]              
Accumulated Value 9,650            
C000071917_ClassMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 10,526            
C000071917_ClassMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 12,430            
C000071917_ClassMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 12,393            
C000071917_ClassMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 12,306            
C000071917_ClassMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 11,234            
C000071917_ClassMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 17,185            
C000071917_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 21,125            
C000071917_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 19,033            
C000071917_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 21,287            
C000071917_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 24,239            
C000071917_LG_1_AdditionalIndexMember_11YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI ACWI (All Country World Index) Commodity Producers Sector Capped Index</span>
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Account Value [Line Items]              
Accumulated Value 10,000            
C000071917_1_AdditionalIndexMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 11,142            
C000071917_1_AdditionalIndexMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 13,428            
C000071917_1_AdditionalIndexMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 13,646            
C000071917_1_AdditionalIndexMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 13,195            
C000071917_1_AdditionalIndexMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 11,260            
C000071917_1_AdditionalIndexMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 17,618            
C000071917_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 19,812            
C000071917_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 19,281            
C000071917_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 20,411            
C000071917_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 23,332            
C000071917_LG_2_AdditionalIndexMember_11YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI ACWI (All Country World Index) Index</span>
C000071917_2_AdditionalIndexMember_AsOf_2015Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000071917_2_AdditionalIndexMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 10,248            
C000071917_2_AdditionalIndexMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 12,676            
C000071917_2_AdditionalIndexMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 12,658            
C000071917_2_AdditionalIndexMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 14,311            
C000071917_2_AdditionalIndexMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 15,068            
C000071917_2_AdditionalIndexMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 20,749            
C000071917_2_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 16,664            
C000071917_2_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 18,482            
C000071917_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 24,624            
C000071917_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 30,294            
C000071913_LG_ClassMember_11YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Global Commodity Stock Fund</span>
C000071913_ClassMember_AsOf_2015Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000071913_ClassMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 10,962            
C000071913_ClassMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 13,007            
C000071913_ClassMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 13,037            
C000071913_ClassMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 13,006            
C000071913_ClassMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 11,944            
C000071913_ClassMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 18,388            
C000071913_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 22,723            
C000071913_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 20,572            
C000071913_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 23,127            
C000071913_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 26,479            
C000071913_LG_1_AdditionalIndexMember_11YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI ACWI (All Country World Index) Commodity Producers Sector Capped Index</span>
C000071913_1_AdditionalIndexMember_AsOf_2015Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000071913_1_AdditionalIndexMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 11,142            
C000071913_1_AdditionalIndexMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 13,428            
C000071913_1_AdditionalIndexMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 13,646            
C000071913_1_AdditionalIndexMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 13,195            
C000071913_1_AdditionalIndexMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 11,260            
C000071913_1_AdditionalIndexMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 17,618            
C000071913_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 19,812            
C000071913_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 19,281            
C000071913_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 20,411            
C000071913_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 23,332            
C000071913_LG_2_AdditionalIndexMember_11YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name             <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI ACWI (All Country World Index) Index</span>
C000071913_2_AdditionalIndexMember_AsOf_2015Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000071913_2_AdditionalIndexMember_AsOf_2016Member              
Account Value [Line Items]              
Accumulated Value 10,248            
C000071913_2_AdditionalIndexMember_AsOf_2017Member              
Account Value [Line Items]              
Accumulated Value 12,676            
C000071913_2_AdditionalIndexMember_AsOf_2018Member              
Account Value [Line Items]              
Accumulated Value 12,658            
C000071913_2_AdditionalIndexMember_AsOf_2019Member              
Account Value [Line Items]              
Accumulated Value 14,311            
C000071913_2_AdditionalIndexMember_AsOf_2020Member              
Account Value [Line Items]              
Accumulated Value 15,068            
C000071913_2_AdditionalIndexMember_AsOf_2021Member              
Account Value [Line Items]              
Accumulated Value 20,749            
C000071913_2_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 16,664            
C000071913_2_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 18,482            
C000071913_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 24,624            
C000071913_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 30,294            
C000234207_LG_ClassMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class M</span>        
C000234207_ClassMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 9,650            
C000234207_ClassMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 6,938            
C000234207_ClassMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 7,568            
C000234207_ClassMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 9,491            
C000234207_LG_1_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI EAFE ESG Leaders</span>        
C000234207_1_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234207_1_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 7,669            
C000234207_1_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 8,792            
C000234207_1_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value 10,737            
C000234207_LG_2_AdditionalIndexMember_4YRMember              
Account Value [Line Items]              
Line Graph and Table Measure Name     <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">MSCI EAFE Index</span>        
C000234207_2_AdditionalIndexMember_AsOf_2022Member              
Account Value [Line Items]              
Accumulated Value 10,000            
C000234207_2_AdditionalIndexMember_AsOf_2023Member              
Account Value [Line Items]              
Accumulated Value 7,820            
C000234207_2_AdditionalIndexMember_AsOf_2024Member              
Account Value [Line Items]              
Accumulated Value 8,966            
C000234207_2_AdditionalIndexMember_AsOf_2025Member              
Account Value [Line Items]              
Accumulated Value $ 11,050