v3.25.2
Shareholder Report, Holdings (Details)
Jun. 30, 2025
Fidelity New Markets Income Fund | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity New Markets Income Fund | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity New Markets Income Fund | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity New Markets Income Fund | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity New Markets Income Fund | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity New Markets Income Fund | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity New Markets Income Fund | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity New Markets Income Fund | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity New Markets Income Fund | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity New Markets Income Fund | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity New Markets Income Fund | QDUSGovernmentandUSGovernmentAgencyObligationsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity New Markets Income Fund | QDAAMember  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
Fidelity New Markets Income Fund | QDAMember  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity New Markets Income Fund | QDBBBMember  
Holdings [Line Items]  
Percent of Net Asset Value 19.70%
Fidelity New Markets Income Fund | QDBBMember  
Holdings [Line Items]  
Percent of Net Asset Value 21.70%
Fidelity New Markets Income Fund | QDBMember  
Holdings [Line Items]  
Percent of Net Asset Value 17.20%
Fidelity New Markets Income Fund | QDCCCCCCMember  
Holdings [Line Items]  
Percent of Net Asset Value 13.20%
Fidelity New Markets Income Fund | QDDMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity New Markets Income Fund | QDNotRatedMember  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity New Markets Income Fund | QDEquitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity New Markets Income Fund | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
Fidelity New Markets Income Fund | United States  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
Fidelity New Markets Income Fund | Mexico  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
Fidelity New Markets Income Fund | Saudi Arabia  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
Fidelity New Markets Income Fund | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity New Markets Income Fund | Colombia  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity New Markets Income Fund | United Arab Emirates  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity New Markets Income Fund | Chile  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity New Markets Income Fund | Turkey  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
Fidelity New Markets Income Fund | Indonesia  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity New Markets Income Fund | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 55.30%
Fidelity New Markets Income Fund | AAForeignGovernmentandGovernmentAgencyObligationsMember  
Holdings [Line Items]  
Percent of Net Asset Value 56.30%
Fidelity New Markets Income Fund | AACorporateBondsMember  
Holdings [Line Items]  
Percent of Net Asset Value 30.00%
Fidelity New Markets Income Fund | AAUSTreasuryObligationsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity New Markets Income Fund | AAPreferredSecuritiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity New Markets Income Fund | AAFixedIncomeFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity New Markets Income Fund | AAPreferredStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity New Markets Income Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
Fidelity Advisor New Markets Income Fund - Class Z | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Advisor New Markets Income Fund - Class Z | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Advisor New Markets Income Fund - Class Z | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Advisor New Markets Income Fund - Class Z | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Advisor New Markets Income Fund - Class Z | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity Advisor New Markets Income Fund - Class Z | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Advisor New Markets Income Fund - Class Z | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Advisor New Markets Income Fund - Class Z | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Advisor New Markets Income Fund - Class Z | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Advisor New Markets Income Fund - Class Z | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Advisor New Markets Income Fund - Class Z | QDUSGovernmentandUSGovernmentAgencyObligationsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Advisor New Markets Income Fund - Class Z | QDAAMember  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
Fidelity Advisor New Markets Income Fund - Class Z | QDAMember  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Advisor New Markets Income Fund - Class Z | QDBBBMember  
Holdings [Line Items]  
Percent of Net Asset Value 19.70%
Fidelity Advisor New Markets Income Fund - Class Z | QDBBMember  
Holdings [Line Items]  
Percent of Net Asset Value 21.70%
Fidelity Advisor New Markets Income Fund - Class Z | QDBMember  
Holdings [Line Items]  
Percent of Net Asset Value 17.20%
Fidelity Advisor New Markets Income Fund - Class Z | QDCCCCCCMember  
Holdings [Line Items]  
Percent of Net Asset Value 13.20%
Fidelity Advisor New Markets Income Fund - Class Z | QDDMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Advisor New Markets Income Fund - Class Z | QDNotRatedMember  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity Advisor New Markets Income Fund - Class Z | QDEquitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor New Markets Income Fund - Class Z | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
Fidelity Advisor New Markets Income Fund - Class Z | United States  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
Fidelity Advisor New Markets Income Fund - Class Z | Mexico  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
Fidelity Advisor New Markets Income Fund - Class Z | Saudi Arabia  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
Fidelity Advisor New Markets Income Fund - Class Z | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor New Markets Income Fund - Class Z | Colombia  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor New Markets Income Fund - Class Z | United Arab Emirates  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity Advisor New Markets Income Fund - Class Z | Chile  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity Advisor New Markets Income Fund - Class Z | Turkey  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
Fidelity Advisor New Markets Income Fund - Class Z | Indonesia  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Advisor New Markets Income Fund - Class Z | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 55.30%
Fidelity Advisor New Markets Income Fund - Class Z | AAForeignGovernmentandGovernmentAgencyObligationsMember  
Holdings [Line Items]  
Percent of Net Asset Value 56.30%
Fidelity Advisor New Markets Income Fund - Class Z | AACorporateBondsMember  
Holdings [Line Items]  
Percent of Net Asset Value 30.00%
Fidelity Advisor New Markets Income Fund - Class Z | AAUSTreasuryObligationsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Advisor New Markets Income Fund - Class Z | AAPreferredSecuritiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Advisor New Markets Income Fund - Class Z | AAFixedIncomeFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor New Markets Income Fund - Class Z | AAPreferredStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor New Markets Income Fund - Class Z | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
Fidelity Advisor New Markets Income Fund - Class M | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Advisor New Markets Income Fund - Class M | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Advisor New Markets Income Fund - Class M | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Advisor New Markets Income Fund - Class M | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Advisor New Markets Income Fund - Class M | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity Advisor New Markets Income Fund - Class M | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Advisor New Markets Income Fund - Class M | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Advisor New Markets Income Fund - Class M | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Advisor New Markets Income Fund - Class M | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Advisor New Markets Income Fund - Class M | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Advisor New Markets Income Fund - Class M | QDUSGovernmentandUSGovernmentAgencyObligationsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Advisor New Markets Income Fund - Class M | QDAAMember  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
Fidelity Advisor New Markets Income Fund - Class M | QDAMember  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Advisor New Markets Income Fund - Class M | QDBBBMember  
Holdings [Line Items]  
Percent of Net Asset Value 19.70%
Fidelity Advisor New Markets Income Fund - Class M | QDBBMember  
Holdings [Line Items]  
Percent of Net Asset Value 21.70%
Fidelity Advisor New Markets Income Fund - Class M | QDBMember  
Holdings [Line Items]  
Percent of Net Asset Value 17.20%
Fidelity Advisor New Markets Income Fund - Class M | QDCCCCCCMember  
Holdings [Line Items]  
Percent of Net Asset Value 13.20%
Fidelity Advisor New Markets Income Fund - Class M | QDDMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Advisor New Markets Income Fund - Class M | QDNotRatedMember  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity Advisor New Markets Income Fund - Class M | QDEquitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor New Markets Income Fund - Class M | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
Fidelity Advisor New Markets Income Fund - Class M | United States  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
Fidelity Advisor New Markets Income Fund - Class M | Mexico  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
Fidelity Advisor New Markets Income Fund - Class M | Saudi Arabia  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
Fidelity Advisor New Markets Income Fund - Class M | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor New Markets Income Fund - Class M | Colombia  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor New Markets Income Fund - Class M | United Arab Emirates  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity Advisor New Markets Income Fund - Class M | Chile  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity Advisor New Markets Income Fund - Class M | Turkey  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
Fidelity Advisor New Markets Income Fund - Class M | Indonesia  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Advisor New Markets Income Fund - Class M | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 55.30%
Fidelity Advisor New Markets Income Fund - Class M | AAForeignGovernmentandGovernmentAgencyObligationsMember  
Holdings [Line Items]  
Percent of Net Asset Value 56.30%
Fidelity Advisor New Markets Income Fund - Class M | AACorporateBondsMember  
Holdings [Line Items]  
Percent of Net Asset Value 30.00%
Fidelity Advisor New Markets Income Fund - Class M | AAUSTreasuryObligationsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Advisor New Markets Income Fund - Class M | AAPreferredSecuritiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Advisor New Markets Income Fund - Class M | AAFixedIncomeFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor New Markets Income Fund - Class M | AAPreferredStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor New Markets Income Fund - Class M | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
Fidelity Advisor New Markets Income Fund - Class I | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Advisor New Markets Income Fund - Class I | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Advisor New Markets Income Fund - Class I | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Advisor New Markets Income Fund - Class I | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Advisor New Markets Income Fund - Class I | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity Advisor New Markets Income Fund - Class I | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Advisor New Markets Income Fund - Class I | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Advisor New Markets Income Fund - Class I | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Advisor New Markets Income Fund - Class I | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Advisor New Markets Income Fund - Class I | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Advisor New Markets Income Fund - Class I | QDUSGovernmentandUSGovernmentAgencyObligationsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Advisor New Markets Income Fund - Class I | QDAAMember  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
Fidelity Advisor New Markets Income Fund - Class I | QDAMember  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Advisor New Markets Income Fund - Class I | QDBBBMember  
Holdings [Line Items]  
Percent of Net Asset Value 19.70%
Fidelity Advisor New Markets Income Fund - Class I | QDBBMember  
Holdings [Line Items]  
Percent of Net Asset Value 21.70%
Fidelity Advisor New Markets Income Fund - Class I | QDBMember  
Holdings [Line Items]  
Percent of Net Asset Value 17.20%
Fidelity Advisor New Markets Income Fund - Class I | QDCCCCCCMember  
Holdings [Line Items]  
Percent of Net Asset Value 13.20%
Fidelity Advisor New Markets Income Fund - Class I | QDDMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Advisor New Markets Income Fund - Class I | QDNotRatedMember  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity Advisor New Markets Income Fund - Class I | QDEquitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor New Markets Income Fund - Class I | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
Fidelity Advisor New Markets Income Fund - Class I | United States  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
Fidelity Advisor New Markets Income Fund - Class I | Mexico  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
Fidelity Advisor New Markets Income Fund - Class I | Saudi Arabia  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
Fidelity Advisor New Markets Income Fund - Class I | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor New Markets Income Fund - Class I | Colombia  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor New Markets Income Fund - Class I | United Arab Emirates  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity Advisor New Markets Income Fund - Class I | Chile  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity Advisor New Markets Income Fund - Class I | Turkey  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
Fidelity Advisor New Markets Income Fund - Class I | Indonesia  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Advisor New Markets Income Fund - Class I | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 55.30%
Fidelity Advisor New Markets Income Fund - Class I | AAForeignGovernmentandGovernmentAgencyObligationsMember  
Holdings [Line Items]  
Percent of Net Asset Value 56.30%
Fidelity Advisor New Markets Income Fund - Class I | AACorporateBondsMember  
Holdings [Line Items]  
Percent of Net Asset Value 30.00%
Fidelity Advisor New Markets Income Fund - Class I | AAUSTreasuryObligationsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Advisor New Markets Income Fund - Class I | AAPreferredSecuritiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Advisor New Markets Income Fund - Class I | AAFixedIncomeFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor New Markets Income Fund - Class I | AAPreferredStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor New Markets Income Fund - Class I | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
Fidelity Advisor New Markets Income Fund - Class C | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Advisor New Markets Income Fund - Class C | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Advisor New Markets Income Fund - Class C | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Advisor New Markets Income Fund - Class C | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Advisor New Markets Income Fund - Class C | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity Advisor New Markets Income Fund - Class C | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Advisor New Markets Income Fund - Class C | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Advisor New Markets Income Fund - Class C | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Advisor New Markets Income Fund - Class C | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Advisor New Markets Income Fund - Class C | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Advisor New Markets Income Fund - Class C | QDUSGovernmentandUSGovernmentAgencyObligationsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Advisor New Markets Income Fund - Class C | QDAAMember  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
Fidelity Advisor New Markets Income Fund - Class C | QDAMember  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Advisor New Markets Income Fund - Class C | QDBBBMember  
Holdings [Line Items]  
Percent of Net Asset Value 19.70%
Fidelity Advisor New Markets Income Fund - Class C | QDBBMember  
Holdings [Line Items]  
Percent of Net Asset Value 21.70%
Fidelity Advisor New Markets Income Fund - Class C | QDBMember  
Holdings [Line Items]  
Percent of Net Asset Value 17.20%
Fidelity Advisor New Markets Income Fund - Class C | QDCCCCCCMember  
Holdings [Line Items]  
Percent of Net Asset Value 13.20%
Fidelity Advisor New Markets Income Fund - Class C | QDDMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Advisor New Markets Income Fund - Class C | QDNotRatedMember  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity Advisor New Markets Income Fund - Class C | QDEquitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor New Markets Income Fund - Class C | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
Fidelity Advisor New Markets Income Fund - Class C | United States  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
Fidelity Advisor New Markets Income Fund - Class C | Mexico  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
Fidelity Advisor New Markets Income Fund - Class C | Saudi Arabia  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
Fidelity Advisor New Markets Income Fund - Class C | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor New Markets Income Fund - Class C | Colombia  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor New Markets Income Fund - Class C | United Arab Emirates  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity Advisor New Markets Income Fund - Class C | Chile  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity Advisor New Markets Income Fund - Class C | Turkey  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
Fidelity Advisor New Markets Income Fund - Class C | Indonesia  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Advisor New Markets Income Fund - Class C | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 55.30%
Fidelity Advisor New Markets Income Fund - Class C | AAForeignGovernmentandGovernmentAgencyObligationsMember  
Holdings [Line Items]  
Percent of Net Asset Value 56.30%
Fidelity Advisor New Markets Income Fund - Class C | AACorporateBondsMember  
Holdings [Line Items]  
Percent of Net Asset Value 30.00%
Fidelity Advisor New Markets Income Fund - Class C | AAUSTreasuryObligationsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Advisor New Markets Income Fund - Class C | AAPreferredSecuritiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Advisor New Markets Income Fund - Class C | AAFixedIncomeFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor New Markets Income Fund - Class C | AAPreferredStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor New Markets Income Fund - Class C | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
Fidelity Advisor New Markets Income Fund - Class A | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Advisor New Markets Income Fund - Class A | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Advisor New Markets Income Fund - Class A | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Advisor New Markets Income Fund - Class A | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Advisor New Markets Income Fund - Class A | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity Advisor New Markets Income Fund - Class A | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Advisor New Markets Income Fund - Class A | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Advisor New Markets Income Fund - Class A | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Advisor New Markets Income Fund - Class A | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Advisor New Markets Income Fund - Class A | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Advisor New Markets Income Fund - Class A | QDUSGovernmentandUSGovernmentAgencyObligationsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Advisor New Markets Income Fund - Class A | QDAAMember  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
Fidelity Advisor New Markets Income Fund - Class A | QDAMember  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Advisor New Markets Income Fund - Class A | QDBBBMember  
Holdings [Line Items]  
Percent of Net Asset Value 19.70%
Fidelity Advisor New Markets Income Fund - Class A | QDBBMember  
Holdings [Line Items]  
Percent of Net Asset Value 21.70%
Fidelity Advisor New Markets Income Fund - Class A | QDBMember  
Holdings [Line Items]  
Percent of Net Asset Value 17.20%
Fidelity Advisor New Markets Income Fund - Class A | QDCCCCCCMember  
Holdings [Line Items]  
Percent of Net Asset Value 13.20%
Fidelity Advisor New Markets Income Fund - Class A | QDDMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Advisor New Markets Income Fund - Class A | QDNotRatedMember  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity Advisor New Markets Income Fund - Class A | QDEquitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor New Markets Income Fund - Class A | QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
Fidelity Advisor New Markets Income Fund - Class A | United States  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
Fidelity Advisor New Markets Income Fund - Class A | Mexico  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
Fidelity Advisor New Markets Income Fund - Class A | Saudi Arabia  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
Fidelity Advisor New Markets Income Fund - Class A | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor New Markets Income Fund - Class A | Colombia  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor New Markets Income Fund - Class A | United Arab Emirates  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity Advisor New Markets Income Fund - Class A | Chile  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity Advisor New Markets Income Fund - Class A | Turkey  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
Fidelity Advisor New Markets Income Fund - Class A | Indonesia  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Advisor New Markets Income Fund - Class A | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 55.30%
Fidelity Advisor New Markets Income Fund - Class A | AAForeignGovernmentandGovernmentAgencyObligationsMember  
Holdings [Line Items]  
Percent of Net Asset Value 56.30%
Fidelity Advisor New Markets Income Fund - Class A | AACorporateBondsMember  
Holdings [Line Items]  
Percent of Net Asset Value 30.00%
Fidelity Advisor New Markets Income Fund - Class A | AAUSTreasuryObligationsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Advisor New Markets Income Fund - Class A | AAPreferredSecuritiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Advisor New Markets Income Fund - Class A | AAFixedIncomeFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor New Markets Income Fund - Class A | AAPreferredStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor New Markets Income Fund - Class A | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%