v3.25.2
Shareholder Report, Line Graph (Details) - USD ($)
12 Months Ended 48 Months Ended 60 Months Ended 84 Months Ended 96 Months Ended 132 Months Ended
Apr. 30, 2025
Apr. 30, 2025
Apr. 30, 2025
Apr. 30, 2025
Apr. 30, 2025
Apr. 30, 2025
C000205018_0_LG_BBIndexMember_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;">Bloomberg U.S. Universal Bond Index</span>  
C000205018_0_BBIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value $ 10,000          
C000205018_0_BBIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,464          
C000205018_0_BBIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,422          
C000205018_0_BBIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 11,625          
C000205018_0_BBIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,629          
C000205018_0_BBIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 10,596          
C000205018_0_BBIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,560          
C000205018_0_BBIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 11,420          
C000132244_0_LG_BBIndexMember_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;">Bloomberg U.S. Universal Bond Index</span>
C000132244_0_BBIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000132244_0_BBIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,257          
C000132244_0_BBIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,469          
C000132244_0_BBIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,470          
C000132244_0_BBIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,033          
C000132244_0_BBIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,042          
C000132244_0_BBIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 12,256          
C000132244_0_BBIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 11,206          
C000132244_0_BBIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 11,171          
C000132244_0_BBIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 11,134          
C000132244_0_BBIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 12,040          
C000132246_0_LG_BBIndexMember_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;">Bloomberg U.S. Universal Bond Index</span>
C000132246_0_BBIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000132246_0_BBIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,257          
C000132246_0_BBIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,469          
C000132246_0_BBIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,470          
C000132246_0_BBIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,033          
C000132246_0_BBIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,042          
C000132246_0_BBIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 12,256          
C000132246_0_BBIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 11,206          
C000132246_0_BBIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 11,171          
C000132246_0_BBIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 11,134          
C000132246_0_BBIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 12,040          
C000132247_0_LG_BBIndexMember_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;">Bloomberg U.S. Universal Bond Index</span>
C000132247_0_BBIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000132247_0_BBIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,257          
C000132247_0_BBIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,469          
C000132247_0_BBIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,470          
C000132247_0_BBIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,033          
C000132247_0_BBIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,042          
C000132247_0_BBIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 12,256          
C000132247_0_BBIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 11,206          
C000132247_0_BBIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 11,171          
C000132247_0_BBIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 11,134          
C000132247_0_BBIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 12,040          
C000132248_0_LG_BBIndexMember_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;">Bloomberg U.S. Universal Bond Index</span>
C000132248_0_BBIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000132248_0_BBIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,257          
C000132248_0_BBIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,469          
C000132248_0_BBIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,470          
C000132248_0_BBIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,033          
C000132248_0_BBIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,042          
C000132248_0_BBIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 12,256          
C000132248_0_BBIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 11,206          
C000132248_0_BBIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 11,171          
C000132248_0_BBIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 11,134          
C000132248_0_BBIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 12,040          
C000132245_0_LG_BBIndexMember_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;">Bloomberg U.S. Universal Bond Index</span>
C000132245_0_BBIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000132245_0_BBIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,257          
C000132245_0_BBIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,469          
C000132245_0_BBIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,470          
C000132245_0_BBIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,033          
C000132245_0_BBIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,042          
C000132245_0_BBIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 12,256          
C000132245_0_BBIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 11,206          
C000132245_0_BBIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 11,171          
C000132245_0_BBIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 11,134          
C000132245_0_BBIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 12,040          
C000227362_LG_ClassMember_5YRMember            
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 High Income Fund</span>      
C000227362_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000227362_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 9,490          
C000227362_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 9,484          
C000227362_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,247          
C000227362_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 11,170          
C000227362_LG_1_AdditionalIndexMember_5YRMember            
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;">ICE® BofA® US High Yield Constrained Index</span>      
C000227362_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000227362_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 9,513          
C000227362_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 9,611          
C000227362_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,466          
C000227362_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 11,375          
C000227362_LG_2_AdditionalIndexMember_5YRMember            
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;">Bloomberg U.S. Universal Bond Index</span>      
C000227362_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000227362_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 9,166          
C000227362_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 9,137          
C000227362_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 9,106          
C000227362_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 9,848          
C000205018_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>  
C000205018_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000205018_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,267          
C000205018_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,037          
C000205018_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 11,162          
C000205018_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,909          
C000205018_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 11,048          
C000205018_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 11,985          
C000205018_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 12,824          
C000205018_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;">Fidelity Short Duration High Income Fund Composite Index℠</span>  
C000205018_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000205018_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,334          
C000205018_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 9,902          
C000205018_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 11,501          
C000205018_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 11,384          
C000205018_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 11,672          
C000205018_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 12,717          
C000205018_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 13,628          
C000205018_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;">ICE® BofA® 1-5 Year BB-B US Cash Pay High Yield Constrained Index</span>  
C000205018_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000205018_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,345          
C000205018_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 9,836          
C000205018_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 11,439          
C000205018_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 11,242          
C000205018_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 11,503          
C000205018_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 12,464          
C000205018_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 13,378          
C000206227_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 A</span>  
C000206227_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 9,600          
C000206227_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,146          
C000206227_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 9,575          
C000206227_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 10,969          
C000206227_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,418          
C000206227_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 10,280          
C000206227_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 11,117          
C000206227_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 12,030          
C000206227_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;">ICE® BofA® US High Yield Constrained Index</span>  
C000206227_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000206227_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,620          
C000206227_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,060          
C000206227_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 12,073          
C000206227_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 11,474          
C000206227_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 11,593          
C000206227_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 12,623          
C000206227_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 13,720          
C000206227_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;">Bloomberg U.S. Universal Bond Index</span>  
C000206227_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000206227_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,458          
C000206227_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,415          
C000206227_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 11,618          
C000206227_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,623          
C000206227_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 10,589          
C000206227_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,554          
C000206227_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 11,413          
C000235373_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>        
C000235373_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 9,425          
C000235373_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 9,962          
C000235373_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 11,235          
C000235373_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 11,772          
C000235373_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 World Health & Wellness Select Index</span>        
C000235373_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000235373_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 10,562          
C000235373_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 11,930          
C000235373_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 13,118          
C000235373_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 ACWI (All Country World Index) Index</span>        
C000235373_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000235373_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 10,675          
C000235373_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 12,583          
C000235373_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 14,118          
C000211261_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;">Class M</span>    
C000211261_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 9,650          
C000211261_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 9,445          
C000211261_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 14,702          
C000211261_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 12,987          
C000211261_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 13,225          
C000211261_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 15,634          
C000211261_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 15,714          
C000211261_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 USA Women's Leadership Index</span>    
C000211261_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000211261_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 9,399          
C000211261_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 14,585          
C000211261_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 13,499          
C000211261_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 13,031          
C000211261_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 15,104          
C000211261_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 15,610          
C000211261_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;">Russell 3000® Index</span>    
C000211261_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000211261_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 9,973          
C000211261_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 15,051          
C000211261_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 14,582          
C000211261_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 14,801          
C000211261_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 18,102          
C000211261_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 20,166          
C000206225_LG_ClassMember_8YRMember            
Account Value [Line Items]            
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C000206225_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000206225_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,577          
C000206225_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
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Account Value [Line Items]            
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C000206225_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
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C000206225_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
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C000206225_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
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C000206225_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;">ICE® BofA® US High Yield Constrained Index</span>  
C000206225_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000206225_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,620          
C000206225_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
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Account Value [Line Items]            
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C000206225_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
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C000206225_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
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C000206225_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 12,623          
C000206225_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
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C000206225_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;">Bloomberg U.S. Universal Bond Index</span>  
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Account Value [Line Items]            
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C000206225_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
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C000206225_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
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Account Value [Line Items]            
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C000206225_2_AdditionalIndexMember_AsOf_2025Member            
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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          
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C000211258_ClassMember_AsOf_2022Member            
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C000211258_ClassMember_AsOf_2024Member            
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Accumulated Value 16,754          
C000211258_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
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C000211258_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 USA Women's Leadership Index</span>    
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Account Value [Line Items]            
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C000211258_1_AdditionalIndexMember_AsOf_2020Member            
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C000211258_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
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Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 3000® Index</span>    
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C000211260_LG_ClassMember_7YRMember            
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Account Value [Line Items]            
Accumulated Value 10,000          
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C000211260_ClassMember_AsOf_2025Member            
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C000211260_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 USA Women's Leadership Index</span>    
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C000211260_1_AdditionalIndexMember_AsOf_2020Member            
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C000211260_1_AdditionalIndexMember_AsOf_2025Member            
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Line Graph and Table Measure Name       <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 3000® Index</span>    
C000211260_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
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Line Graph and Table Measure Name           <span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity Short Duration High Income Fund Composite Index℠</span>
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C000132244_1_AdditionalIndexMember_AsOf_2020Member            
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Accumulated Value 14,572          
C000132244_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;">ICE® BofA® 1-5 Year BB-B US Cash Pay High Yield Constrained Index</span>
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Account Value [Line Items]            
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C000132244_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,883          
C000132244_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,870          
C000132244_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 11,239          
C000132244_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,949          
C000132244_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,362          
C000132244_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 13,213          
C000132244_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 12,985          
C000132244_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 13,286          
C000132244_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 14,397          
C000132244_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 15,453          
C000235371_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® Healthy Future Fund</span>        
C000235371_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000235371_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 10,590          
C000235371_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 11,979          
C000235371_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 12,582          
C000235371_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 World Health & Wellness Select Index</span>        
C000235371_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000235371_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 10,562          
C000235371_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 11,930          
C000235371_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 13,118          
C000235371_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 ACWI (All Country World Index) Index</span>        
C000235371_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000235371_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 10,675          
C000235371_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 12,583          
C000235371_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 14,118          
C000211262_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;">Class A</span>    
C000211262_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 9,425          
C000211262_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 9,252          
C000211262_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 14,436          
C000211262_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 12,782          
C000211262_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 13,051          
C000211262_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 15,473          
C000211262_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 15,593          
C000211262_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 USA Women's Leadership Index</span>    
C000211262_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000211262_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 9,399          
C000211262_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 14,585          
C000211262_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 13,499          
C000211262_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 13,031          
C000211262_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 15,104          
C000211262_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 15,610          
C000211262_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;">Russell 3000® Index</span>    
C000211262_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000211262_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 9,973          
C000211262_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 15,051          
C000211262_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 14,582          
C000211262_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 14,801          
C000211262_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 18,102          
C000211262_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 20,166          
C000206223_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 M</span>  
C000206223_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 9,600          
C000206223_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,145          
C000206223_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 9,573          
C000206223_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 10,966          
C000206223_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,414          
C000206223_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 10,275          
C000206223_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 11,112          
C000206223_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 12,024          
C000206223_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;">ICE® BofA® US High Yield Constrained Index</span>  
C000206223_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000206223_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,620          
C000206223_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,060          
C000206223_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 12,073          
C000206223_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 11,474          
C000206223_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 11,593          
C000206223_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 12,623          
C000206223_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 13,720          
C000206223_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;">Bloomberg U.S. Universal Bond Index</span>  
C000206223_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000206223_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,458          
C000206223_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,415          
C000206223_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 11,618          
C000206223_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,623          
C000206223_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 10,589          
C000206223_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,554          
C000206223_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 11,413          
C000206224_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 C</span>  
C000206224_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000206224_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,536          
C000206224_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 9,867          
C000206224_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 11,217          
C000206224_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,571          
C000206224_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 10,350          
C000206224_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 11,108          
C000206224_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 11,930          
C000206224_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;">ICE® BofA® US High Yield Constrained Index</span>  
C000206224_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000206224_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,620          
C000206224_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,060          
C000206224_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 12,073          
C000206224_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
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C000206224_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 11,593          
C000206224_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 12,623          
C000206224_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 13,720          
C000206224_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;">Bloomberg U.S. Universal Bond Index</span>  
C000206224_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000206224_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,458          
C000206224_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,415          
C000206224_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 11,618          
C000206224_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,623          
C000206224_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 10,589          
C000206224_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 10,554          
C000206224_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 11,413          
C000132246_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 A</span>
C000132246_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 9,600          
C000132246_ClassMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,307          
C000132246_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,130          
C000132246_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,368          
C000132246_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,837          
C000132246_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 10,569          
C000132246_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 11,714          
C000132246_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 11,410          
C000132246_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 11,516          
C000132246_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 12,451          
C000132246_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 13,263          
C000132246_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;">Fidelity Short Duration High Income Fund Composite Index℠</span>
C000132246_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000132246_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,933          
C000132246_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,827          
C000132246_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 11,173          
C000132246_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,841          
C000132246_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,347          
C000132246_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 13,179          
C000132246_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 13,045          
C000132246_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 13,374          
C000132246_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 14,572          
C000132246_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 15,616          
C000132246_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;">ICE® BofA® 1-5 Year BB-B US Cash Pay High Yield Constrained Index</span>
C000132246_2_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000132246_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,883          
C000132246_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,870          
C000132246_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 11,239          
C000132246_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,949          
C000132246_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,362          
C000132246_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 13,213          
C000132246_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 12,985          
C000132246_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 13,286          
C000132246_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 14,397          
C000132246_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 15,453          
C000235372_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>        
C000235372_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 9,650          
C000235372_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 10,171          
C000235372_ClassMember_AsOf_2024Member            
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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 I</span>    
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Account Value [Line Items]            
Accumulated Value 10,000          
C000211259_ClassMember_AsOf_2020Member            
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C000211259_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 16,654          
C000211259_ClassMember_AsOf_2025Member            
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C000211259_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 USA Women's Leadership Index</span>    
C000211259_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
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C000211259_1_AdditionalIndexMember_AsOf_2020Member            
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Account Value [Line Items]            
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C000211259_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 15,104          
C000211259_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
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C000211259_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;">Russell 3000® Index</span>    
C000211259_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000211259_2_AdditionalIndexMember_AsOf_2020Member            
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Account Value [Line Items]            
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Account Value [Line Items]            
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Account Value [Line Items]            
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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 10,604          
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Account Value [Line Items]            
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C000132245_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,402          
C000132245_ClassMember_AsOf_2020Member            
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C000132245_ClassMember_AsOf_2021Member            
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Account Value [Line Items]            
Accumulated Value 12,238          
C000132245_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 13,265          
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C000132245_LG_1_AdditionalIndexMember_11YRMember            
Account Value [Line Items]            
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C000132245_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000132245_1_AdditionalIndexMember_AsOf_2016Member            
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Accumulated Value 9,933          
C000132245_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,827          
C000132245_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 11,173          
C000132245_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,841          
C000132245_1_AdditionalIndexMember_AsOf_2020Member            
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C000132245_1_AdditionalIndexMember_AsOf_2023Member            
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C000132245_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 14,572          
C000132245_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
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C000132245_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;">ICE® BofA® 1-5 Year BB-B US Cash Pay High Yield Constrained Index</span>
C000132245_2_AdditionalIndexMember_AsOf_2015Member            
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Accumulated Value 10,000          
C000132245_2_AdditionalIndexMember_AsOf_2016Member            
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C000132245_2_AdditionalIndexMember_AsOf_2017Member            
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C000132245_2_AdditionalIndexMember_AsOf_2018Member            
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C000132245_2_AdditionalIndexMember_AsOf_2019Member            
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Accumulated Value 11,949          
C000132245_2_AdditionalIndexMember_AsOf_2020Member            
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C000132245_2_AdditionalIndexMember_AsOf_2022Member            
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C000132245_2_AdditionalIndexMember_AsOf_2024Member            
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C000132245_2_AdditionalIndexMember_AsOf_2025Member            
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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>        
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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 Health & Wellness Select Index</span>        
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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>        
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Accumulated Value 10,000          
C000211263_2_AdditionalIndexMember_AsOf_2020Member            
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Accumulated Value 10,000          
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C000098085_ClassMember_AsOf_2020Member            
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C000098085_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;">ICE® BofA® US High Yield Constrained Index</span>
C000098085_1_AdditionalIndexMember_AsOf_2015Member            
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Accumulated Value 10,000          
C000098085_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
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C000098085_1_AdditionalIndexMember_AsOf_2017Member            
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C000098085_1_AdditionalIndexMember_AsOf_2018Member            
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C000098085_1_AdditionalIndexMember_AsOf_2019Member            
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C000098085_1_AdditionalIndexMember_AsOf_2020Member            
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C000098085_1_AdditionalIndexMember_AsOf_2024Member            
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C000098085_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;">Bloomberg U.S. Universal Bond Index</span>
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C000098085_2_AdditionalIndexMember_AsOf_2017Member            
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C000098085_2_AdditionalIndexMember_AsOf_2018Member            
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Accumulated Value 10,470          
C000098085_2_AdditionalIndexMember_AsOf_2019Member            
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Accumulated Value 11,033          
C000098085_2_AdditionalIndexMember_AsOf_2020Member            
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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]            
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Account Value [Line Items]            
Accumulated Value 12,009          
C000235369_ClassMember_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;">MSCI World Health & Wellness Select Index</span>        
C000235369_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000235369_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 10,562          
C000235369_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 11,930          
C000235369_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 13,118          
C000235369_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 ACWI (All Country World Index) Index</span>        
C000235369_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000235369_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 10,675          
C000235369_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 12,583          
C000235369_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 14,118          
C000235374_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>        
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Account Value [Line Items]            
Accumulated Value 10,000          
C000235374_ClassMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 10,490          
C000235374_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 11,750          
C000235374_ClassMember_AsOf_2025Member            
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Accumulated Value 12,210          
C000235374_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 World Health & Wellness Select Index</span>        
C000235374_1_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000235374_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 10,562          
C000235374_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 11,930          
C000235374_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 13,118          
C000235374_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 ACWI (All Country World Index) Index</span>        
C000235374_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000235374_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
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C000235374_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
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C000235374_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 14,118          
C000215144_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® U.S. Low Volatility Equity Fund</span>    
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Account Value [Line Items]            
Accumulated Value 10,000          
C000215144_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 9,256          
C000215144_ClassMember_AsOf_2021Member            
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C000215144_ClassMember_AsOf_2023Member            
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Accumulated Value 11,584          
C000215144_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 12,748          
C000215144_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 14,272          
C000215144_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 USA Minimum Volatility Index</span>    
C000215144_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000215144_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 9,464          
C000215144_1_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
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C000215144_1_AdditionalIndexMember_AsOf_2022Member            
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Accumulated Value 12,195          
C000215144_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 12,488          
C000215144_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 13,830          
C000215144_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 16,180          
C000215144_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;">Russell 3000® Index</span>    
C000215144_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000215144_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 9,442          
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Account Value [Line Items]            
Accumulated Value 14,250          
C000215144_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 13,806          
C000215144_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 14,013          
C000215144_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 17,138          
C000215144_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 19,092          
C000048885_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® Focused High Income Fund</span>
C000048885_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
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Account Value [Line Items]            
Accumulated Value 9,870          
C000048885_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,878          
C000048885_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 11,080          
C000048885_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,879          
C000048885_ClassMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 11,860          
C000048885_ClassMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 13,183          
C000048885_ClassMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 12,338          
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Account Value [Line Items]            
Accumulated Value 12,574          
C000048885_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 13,334          
C000048885_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 14,313          
C000048885_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;">ICE® BofA® BB US High Yield Constrained Index</span>
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Account Value [Line Items]            
Accumulated Value 10,000          
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Account Value [Line Items]            
Accumulated Value 10,187          
C000048885_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,181          
C000048885_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 11,436          
C000048885_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 12,270          
C000048885_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,263          
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Account Value [Line Items]            
Accumulated Value 14,230          
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C000048885_1_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 13,708          
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Account Value [Line Items]            
Accumulated Value 14,711          
C000048885_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 15,848          
C000048885_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;">Bloomberg U.S. Universal Bond Index</span>
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Account Value [Line Items]            
Accumulated Value 10,000          
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Account Value [Line Items]            
Accumulated Value 10,257          
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Account Value [Line Items]            
Accumulated Value 10,469          
C000048885_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,470          
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Account Value [Line Items]            
Accumulated Value 11,033          
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Account Value [Line Items]            
Accumulated Value 12,042          
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Account Value [Line Items]            
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Accumulated Value 11,171          
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Account Value [Line Items]            
Accumulated Value 11,134          
C000048885_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 12,040          
C000048886_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® High Income Fund</span>
C000048886_ClassMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
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Account Value [Line Items]            
Accumulated Value 9,753          
C000048886_ClassMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,076          
C000048886_ClassMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 11,549          
C000048886_ClassMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 12,222          
C000048886_ClassMember_AsOf_2020Member            
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Accumulated Value 11,568          
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Accumulated Value 13,291          
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Account Value [Line Items]            
Accumulated Value 12,660          
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Account Value [Line Items]            
Accumulated Value 12,528          
C000048886_ClassMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 13,588          
C000048886_ClassMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 14,764          
C000048886_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;">ICE® BofA® US High Yield Constrained Index</span>
C000048886_1_AdditionalIndexMember_AsOf_2015Member            
Account Value [Line Items]            
Accumulated Value 10,000          
C000048886_1_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 9,870          
C000048886_1_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 11,217          
C000048886_1_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 11,578          
C000048886_1_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 12,354          
C000048886_1_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
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C000048886_1_AdditionalIndexMember_AsOf_2022Member            
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C000048886_1_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 14,685          
C000048886_1_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value 15,961          
C000048886_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;">Bloomberg U.S. Universal Bond Index</span>
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Account Value [Line Items]            
Accumulated Value 10,000          
C000048886_2_AdditionalIndexMember_AsOf_2016Member            
Account Value [Line Items]            
Accumulated Value 10,257          
C000048886_2_AdditionalIndexMember_AsOf_2017Member            
Account Value [Line Items]            
Accumulated Value 10,469          
C000048886_2_AdditionalIndexMember_AsOf_2018Member            
Account Value [Line Items]            
Accumulated Value 10,470          
C000048886_2_AdditionalIndexMember_AsOf_2019Member            
Account Value [Line Items]            
Accumulated Value 11,033          
C000048886_2_AdditionalIndexMember_AsOf_2020Member            
Account Value [Line Items]            
Accumulated Value 12,042          
C000048886_2_AdditionalIndexMember_AsOf_2021Member            
Account Value [Line Items]            
Accumulated Value 12,256          
C000048886_2_AdditionalIndexMember_AsOf_2022Member            
Account Value [Line Items]            
Accumulated Value 11,206          
C000048886_2_AdditionalIndexMember_AsOf_2023Member            
Account Value [Line Items]            
Accumulated Value 11,171          
C000048886_2_AdditionalIndexMember_AsOf_2024Member            
Account Value [Line Items]            
Accumulated Value 11,134          
C000048886_2_AdditionalIndexMember_AsOf_2025Member            
Account Value [Line Items]            
Accumulated Value $ 12,040