v3.25.2
Shareholder Report, Holdings (Details)
Jul. 31, 2025
Fidelity Managed Retirement Income Fund | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 18.50%
Fidelity Managed Retirement Income Fund | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 13.50%
Fidelity Managed Retirement Income Fund | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.60%
Fidelity Managed Retirement Income Fund | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.20%
Fidelity Managed Retirement Income Fund | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
Fidelity Managed Retirement Income Fund | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Managed Retirement Income Fund | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Managed Retirement Income Fund | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
Fidelity Managed Retirement Income Fund | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Managed Retirement Income Fund | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Managed Retirement Income Fund | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 70.80%
Fidelity Managed Retirement Income Fund | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
Fidelity Managed Retirement Income Fund | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
Fidelity Managed Retirement Income Fund | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
Fidelity Managed Retirement Income Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Managed Retirement Income Fund - Class K6 | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 18.50%
Fidelity Managed Retirement Income Fund - Class K6 | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 13.50%
Fidelity Managed Retirement Income Fund - Class K6 | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.60%
Fidelity Managed Retirement Income Fund - Class K6 | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.20%
Fidelity Managed Retirement Income Fund - Class K6 | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
Fidelity Managed Retirement Income Fund - Class K6 | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Managed Retirement Income Fund - Class K6 | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Managed Retirement Income Fund - Class K6 | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
Fidelity Managed Retirement Income Fund - Class K6 | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Managed Retirement Income Fund - Class K6 | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Managed Retirement Income Fund - Class K6 | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 70.80%
Fidelity Managed Retirement Income Fund - Class K6 | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
Fidelity Managed Retirement Income Fund - Class K6 | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
Fidelity Managed Retirement Income Fund - Class K6 | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
Fidelity Managed Retirement Income Fund - Class K6 | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Managed Retirement Income Fund - Class K | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 18.50%
Fidelity Managed Retirement Income Fund - Class K | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 13.50%
Fidelity Managed Retirement Income Fund - Class K | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.60%
Fidelity Managed Retirement Income Fund - Class K | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.20%
Fidelity Managed Retirement Income Fund - Class K | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
Fidelity Managed Retirement Income Fund - Class K | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Managed Retirement Income Fund - Class K | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Managed Retirement Income Fund - Class K | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
Fidelity Managed Retirement Income Fund - Class K | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Managed Retirement Income Fund - Class K | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Managed Retirement Income Fund - Class K | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 70.80%
Fidelity Managed Retirement Income Fund - Class K | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
Fidelity Managed Retirement Income Fund - Class K | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
Fidelity Managed Retirement Income Fund - Class K | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
Fidelity Managed Retirement Income Fund - Class K | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor Managed Retirement Income Fund - Class I | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 18.50%
Fidelity Advisor Managed Retirement Income Fund - Class I | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 13.50%
Fidelity Advisor Managed Retirement Income Fund - Class I | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.60%
Fidelity Advisor Managed Retirement Income Fund - Class I | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.20%
Fidelity Advisor Managed Retirement Income Fund - Class I | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
Fidelity Advisor Managed Retirement Income Fund - Class I | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Advisor Managed Retirement Income Fund - Class I | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Advisor Managed Retirement Income Fund - Class I | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
Fidelity Advisor Managed Retirement Income Fund - Class I | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Advisor Managed Retirement Income Fund - Class I | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Advisor Managed Retirement Income Fund - Class I | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 70.80%
Fidelity Advisor Managed Retirement Income Fund - Class I | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
Fidelity Advisor Managed Retirement Income Fund - Class I | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
Fidelity Advisor Managed Retirement Income Fund - Class I | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
Fidelity Advisor Managed Retirement Income Fund - Class I | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor Managed Retirement Income Fund - Class A | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 18.50%
Fidelity Advisor Managed Retirement Income Fund - Class A | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 13.50%
Fidelity Advisor Managed Retirement Income Fund - Class A | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.60%
Fidelity Advisor Managed Retirement Income Fund - Class A | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.20%
Fidelity Advisor Managed Retirement Income Fund - Class A | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
Fidelity Advisor Managed Retirement Income Fund - Class A | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Advisor Managed Retirement Income Fund - Class A | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Advisor Managed Retirement Income Fund - Class A | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
Fidelity Advisor Managed Retirement Income Fund - Class A | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Advisor Managed Retirement Income Fund - Class A | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Advisor Managed Retirement Income Fund - Class A | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 70.80%
Fidelity Advisor Managed Retirement Income Fund - Class A | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
Fidelity Advisor Managed Retirement Income Fund - Class A | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
Fidelity Advisor Managed Retirement Income Fund - Class A | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
Fidelity Advisor Managed Retirement Income Fund - Class A | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Managed Retirement 2035 Fund | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
Fidelity Managed Retirement 2035 Fund | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
Fidelity Managed Retirement 2035 Fund | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
Fidelity Managed Retirement 2035 Fund | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
Fidelity Managed Retirement 2035 Fund | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
Fidelity Managed Retirement 2035 Fund | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
Fidelity Managed Retirement 2035 Fund | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
Fidelity Managed Retirement 2035 Fund | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
Fidelity Managed Retirement 2035 Fund | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
Fidelity Managed Retirement 2035 Fund | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
Fidelity Managed Retirement 2035 Fund | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 47.50%
Fidelity Managed Retirement 2035 Fund | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 23.70%
Fidelity Managed Retirement 2035 Fund | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 26.90%
Fidelity Managed Retirement 2035 Fund | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Managed Retirement 2035 Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Managed Retirement 2035 Fund - Class K6 | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
Fidelity Managed Retirement 2035 Fund - Class K6 | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
Fidelity Managed Retirement 2035 Fund - Class K6 | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
Fidelity Managed Retirement 2035 Fund - Class K6 | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
Fidelity Managed Retirement 2035 Fund - Class K6 | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
Fidelity Managed Retirement 2035 Fund - Class K6 | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
Fidelity Managed Retirement 2035 Fund - Class K6 | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
Fidelity Managed Retirement 2035 Fund - Class K6 | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
Fidelity Managed Retirement 2035 Fund - Class K6 | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
Fidelity Managed Retirement 2035 Fund - Class K6 | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
Fidelity Managed Retirement 2035 Fund - Class K6 | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 47.50%
Fidelity Managed Retirement 2035 Fund - Class K6 | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 23.70%
Fidelity Managed Retirement 2035 Fund - Class K6 | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 26.90%
Fidelity Managed Retirement 2035 Fund - Class K6 | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Managed Retirement 2035 Fund - Class K6 | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Managed Retirement 2035 Fund - Class K | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
Fidelity Managed Retirement 2035 Fund - Class K | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
Fidelity Managed Retirement 2035 Fund - Class K | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
Fidelity Managed Retirement 2035 Fund - Class K | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
Fidelity Managed Retirement 2035 Fund - Class K | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
Fidelity Managed Retirement 2035 Fund - Class K | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
Fidelity Managed Retirement 2035 Fund - Class K | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
Fidelity Managed Retirement 2035 Fund - Class K | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
Fidelity Managed Retirement 2035 Fund - Class K | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
Fidelity Managed Retirement 2035 Fund - Class K | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
Fidelity Managed Retirement 2035 Fund - Class K | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 47.50%
Fidelity Managed Retirement 2035 Fund - Class K | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 23.70%
Fidelity Managed Retirement 2035 Fund - Class K | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 26.90%
Fidelity Managed Retirement 2035 Fund - Class K | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Managed Retirement 2035 Fund - Class K | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor Managed Retirement 2035 Fund - Class I | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
Fidelity Advisor Managed Retirement 2035 Fund - Class I | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
Fidelity Advisor Managed Retirement 2035 Fund - Class I | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
Fidelity Advisor Managed Retirement 2035 Fund - Class I | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
Fidelity Advisor Managed Retirement 2035 Fund - Class I | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
Fidelity Advisor Managed Retirement 2035 Fund - Class I | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
Fidelity Advisor Managed Retirement 2035 Fund - Class I | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
Fidelity Advisor Managed Retirement 2035 Fund - Class I | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
Fidelity Advisor Managed Retirement 2035 Fund - Class I | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
Fidelity Advisor Managed Retirement 2035 Fund - Class I | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
Fidelity Advisor Managed Retirement 2035 Fund - Class I | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 47.50%
Fidelity Advisor Managed Retirement 2035 Fund - Class I | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 23.70%
Fidelity Advisor Managed Retirement 2035 Fund - Class I | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 26.90%
Fidelity Advisor Managed Retirement 2035 Fund - Class I | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Advisor Managed Retirement 2035 Fund - Class I | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor Managed Retirement 2035 Fund - Class A | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
Fidelity Advisor Managed Retirement 2035 Fund - Class A | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
Fidelity Advisor Managed Retirement 2035 Fund - Class A | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
Fidelity Advisor Managed Retirement 2035 Fund - Class A | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
Fidelity Advisor Managed Retirement 2035 Fund - Class A | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
Fidelity Advisor Managed Retirement 2035 Fund - Class A | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
Fidelity Advisor Managed Retirement 2035 Fund - Class A | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
Fidelity Advisor Managed Retirement 2035 Fund - Class A | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
Fidelity Advisor Managed Retirement 2035 Fund - Class A | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
Fidelity Advisor Managed Retirement 2035 Fund - Class A | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
Fidelity Advisor Managed Retirement 2035 Fund - Class A | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 47.50%
Fidelity Advisor Managed Retirement 2035 Fund - Class A | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 23.70%
Fidelity Advisor Managed Retirement 2035 Fund - Class A | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 26.90%
Fidelity Advisor Managed Retirement 2035 Fund - Class A | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Advisor Managed Retirement 2035 Fund - Class A | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Managed Retirement 2030 Fund | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
Fidelity Managed Retirement 2030 Fund | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
Fidelity Managed Retirement 2030 Fund | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
Fidelity Managed Retirement 2030 Fund | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
Fidelity Managed Retirement 2030 Fund | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
Fidelity Managed Retirement 2030 Fund | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
Fidelity Managed Retirement 2030 Fund | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
Fidelity Managed Retirement 2030 Fund | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
Fidelity Managed Retirement 2030 Fund | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Managed Retirement 2030 Fund | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Managed Retirement 2030 Fund | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 51.90%
Fidelity Managed Retirement 2030 Fund | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 22.00%
Fidelity Managed Retirement 2030 Fund | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 24.30%
Fidelity Managed Retirement 2030 Fund | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Managed Retirement 2030 Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Managed Retirement 2030 Fund - Class K6 | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
Fidelity Managed Retirement 2030 Fund - Class K6 | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
Fidelity Managed Retirement 2030 Fund - Class K6 | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
Fidelity Managed Retirement 2030 Fund - Class K6 | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
Fidelity Managed Retirement 2030 Fund - Class K6 | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
Fidelity Managed Retirement 2030 Fund - Class K6 | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
Fidelity Managed Retirement 2030 Fund - Class K6 | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
Fidelity Managed Retirement 2030 Fund - Class K6 | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
Fidelity Managed Retirement 2030 Fund - Class K6 | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Managed Retirement 2030 Fund - Class K6 | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Managed Retirement 2030 Fund - Class K6 | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 51.90%
Fidelity Managed Retirement 2030 Fund - Class K6 | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 22.00%
Fidelity Managed Retirement 2030 Fund - Class K6 | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 24.30%
Fidelity Managed Retirement 2030 Fund - Class K6 | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Managed Retirement 2030 Fund - Class K6 | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Managed Retirement 2030 Fund - Class K | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
Fidelity Managed Retirement 2030 Fund - Class K | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
Fidelity Managed Retirement 2030 Fund - Class K | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
Fidelity Managed Retirement 2030 Fund - Class K | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
Fidelity Managed Retirement 2030 Fund - Class K | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
Fidelity Managed Retirement 2030 Fund - Class K | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
Fidelity Managed Retirement 2030 Fund - Class K | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
Fidelity Managed Retirement 2030 Fund - Class K | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
Fidelity Managed Retirement 2030 Fund - Class K | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Managed Retirement 2030 Fund - Class K | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Managed Retirement 2030 Fund - Class K | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 51.90%
Fidelity Managed Retirement 2030 Fund - Class K | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 22.00%
Fidelity Managed Retirement 2030 Fund - Class K | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 24.30%
Fidelity Managed Retirement 2030 Fund - Class K | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Managed Retirement 2030 Fund - Class K | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor Managed Retirement 2030 Fund - Class I | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
Fidelity Advisor Managed Retirement 2030 Fund - Class I | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
Fidelity Advisor Managed Retirement 2030 Fund - Class I | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
Fidelity Advisor Managed Retirement 2030 Fund - Class I | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
Fidelity Advisor Managed Retirement 2030 Fund - Class I | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
Fidelity Advisor Managed Retirement 2030 Fund - Class I | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
Fidelity Advisor Managed Retirement 2030 Fund - Class I | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
Fidelity Advisor Managed Retirement 2030 Fund - Class I | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
Fidelity Advisor Managed Retirement 2030 Fund - Class I | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Advisor Managed Retirement 2030 Fund - Class I | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Advisor Managed Retirement 2030 Fund - Class I | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 51.90%
Fidelity Advisor Managed Retirement 2030 Fund - Class I | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 22.00%
Fidelity Advisor Managed Retirement 2030 Fund - Class I | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 24.30%
Fidelity Advisor Managed Retirement 2030 Fund - Class I | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Advisor Managed Retirement 2030 Fund - Class I | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor Managed Retirement 2030 Fund - Class A | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
Fidelity Advisor Managed Retirement 2030 Fund - Class A | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
Fidelity Advisor Managed Retirement 2030 Fund - Class A | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
Fidelity Advisor Managed Retirement 2030 Fund - Class A | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
Fidelity Advisor Managed Retirement 2030 Fund - Class A | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.20%
Fidelity Advisor Managed Retirement 2030 Fund - Class A | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
Fidelity Advisor Managed Retirement 2030 Fund - Class A | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
Fidelity Advisor Managed Retirement 2030 Fund - Class A | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
Fidelity Advisor Managed Retirement 2030 Fund - Class A | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Advisor Managed Retirement 2030 Fund - Class A | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Advisor Managed Retirement 2030 Fund - Class A | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 51.90%
Fidelity Advisor Managed Retirement 2030 Fund - Class A | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 22.00%
Fidelity Advisor Managed Retirement 2030 Fund - Class A | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 24.30%
Fidelity Advisor Managed Retirement 2030 Fund - Class A | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Advisor Managed Retirement 2030 Fund - Class A | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Managed Retirement 2025 Fund | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.90%
Fidelity Managed Retirement 2025 Fund | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.30%
Fidelity Managed Retirement 2025 Fund | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
Fidelity Managed Retirement 2025 Fund | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
Fidelity Managed Retirement 2025 Fund | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
Fidelity Managed Retirement 2025 Fund | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
Fidelity Managed Retirement 2025 Fund | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
Fidelity Managed Retirement 2025 Fund | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
Fidelity Managed Retirement 2025 Fund | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Managed Retirement 2025 Fund | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Managed Retirement 2025 Fund | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 57.30%
Fidelity Managed Retirement 2025 Fund | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 19.80%
Fidelity Managed Retirement 2025 Fund | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 21.00%
Fidelity Managed Retirement 2025 Fund | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Managed Retirement 2025 Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Managed Retirement 2025 Fund - Class K6 | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.90%
Fidelity Managed Retirement 2025 Fund - Class K6 | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.30%
Fidelity Managed Retirement 2025 Fund - Class K6 | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
Fidelity Managed Retirement 2025 Fund - Class K6 | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
Fidelity Managed Retirement 2025 Fund - Class K6 | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
Fidelity Managed Retirement 2025 Fund - Class K6 | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
Fidelity Managed Retirement 2025 Fund - Class K6 | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
Fidelity Managed Retirement 2025 Fund - Class K6 | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
Fidelity Managed Retirement 2025 Fund - Class K6 | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Managed Retirement 2025 Fund - Class K6 | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Managed Retirement 2025 Fund - Class K6 | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 57.30%
Fidelity Managed Retirement 2025 Fund - Class K6 | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 19.80%
Fidelity Managed Retirement 2025 Fund - Class K6 | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 21.00%
Fidelity Managed Retirement 2025 Fund - Class K6 | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Managed Retirement 2025 Fund - Class K6 | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Managed Retirement 2025 Fund - Class K | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.90%
Fidelity Managed Retirement 2025 Fund - Class K | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.30%
Fidelity Managed Retirement 2025 Fund - Class K | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
Fidelity Managed Retirement 2025 Fund - Class K | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
Fidelity Managed Retirement 2025 Fund - Class K | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
Fidelity Managed Retirement 2025 Fund - Class K | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
Fidelity Managed Retirement 2025 Fund - Class K | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
Fidelity Managed Retirement 2025 Fund - Class K | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
Fidelity Managed Retirement 2025 Fund - Class K | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Managed Retirement 2025 Fund - Class K | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Managed Retirement 2025 Fund - Class K | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 57.30%
Fidelity Managed Retirement 2025 Fund - Class K | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 19.80%
Fidelity Managed Retirement 2025 Fund - Class K | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 21.00%
Fidelity Managed Retirement 2025 Fund - Class K | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Managed Retirement 2025 Fund - Class K | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor Managed Retirement 2025 Fund - Class I | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.90%
Fidelity Advisor Managed Retirement 2025 Fund - Class I | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.30%
Fidelity Advisor Managed Retirement 2025 Fund - Class I | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
Fidelity Advisor Managed Retirement 2025 Fund - Class I | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
Fidelity Advisor Managed Retirement 2025 Fund - Class I | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
Fidelity Advisor Managed Retirement 2025 Fund - Class I | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
Fidelity Advisor Managed Retirement 2025 Fund - Class I | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
Fidelity Advisor Managed Retirement 2025 Fund - Class I | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
Fidelity Advisor Managed Retirement 2025 Fund - Class I | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Advisor Managed Retirement 2025 Fund - Class I | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Advisor Managed Retirement 2025 Fund - Class I | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 57.30%
Fidelity Advisor Managed Retirement 2025 Fund - Class I | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 19.80%
Fidelity Advisor Managed Retirement 2025 Fund - Class I | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 21.00%
Fidelity Advisor Managed Retirement 2025 Fund - Class I | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Advisor Managed Retirement 2025 Fund - Class I | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor Managed Retirement 2025 Fund - Class A | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.90%
Fidelity Advisor Managed Retirement 2025 Fund - Class A | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.30%
Fidelity Advisor Managed Retirement 2025 Fund - Class A | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
Fidelity Advisor Managed Retirement 2025 Fund - Class A | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
Fidelity Advisor Managed Retirement 2025 Fund - Class A | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
Fidelity Advisor Managed Retirement 2025 Fund - Class A | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
Fidelity Advisor Managed Retirement 2025 Fund - Class A | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
Fidelity Advisor Managed Retirement 2025 Fund - Class A | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
Fidelity Advisor Managed Retirement 2025 Fund - Class A | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Advisor Managed Retirement 2025 Fund - Class A | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Advisor Managed Retirement 2025 Fund - Class A | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 57.30%
Fidelity Advisor Managed Retirement 2025 Fund - Class A | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 19.80%
Fidelity Advisor Managed Retirement 2025 Fund - Class A | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 21.00%
Fidelity Advisor Managed Retirement 2025 Fund - Class A | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Advisor Managed Retirement 2025 Fund - Class A | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Managed Retirement 2020 Fund | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.30%
Fidelity Managed Retirement 2020 Fund | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
Fidelity Managed Retirement 2020 Fund | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.00%
Fidelity Managed Retirement 2020 Fund | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
Fidelity Managed Retirement 2020 Fund | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
Fidelity Managed Retirement 2020 Fund | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
Fidelity Managed Retirement 2020 Fund | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
Fidelity Managed Retirement 2020 Fund | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
Fidelity Managed Retirement 2020 Fund | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
Fidelity Managed Retirement 2020 Fund | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity Managed Retirement 2020 Fund | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 62.70%
Fidelity Managed Retirement 2020 Fund | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 17.20%
Fidelity Managed Retirement 2020 Fund | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 17.20%
Fidelity Managed Retirement 2020 Fund | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Managed Retirement 2020 Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Managed Retirement 2020 Fund - Class K6 | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.30%
Fidelity Managed Retirement 2020 Fund - Class K6 | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
Fidelity Managed Retirement 2020 Fund - Class K6 | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.00%
Fidelity Managed Retirement 2020 Fund - Class K6 | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
Fidelity Managed Retirement 2020 Fund - Class K6 | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
Fidelity Managed Retirement 2020 Fund - Class K6 | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
Fidelity Managed Retirement 2020 Fund - Class K6 | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
Fidelity Managed Retirement 2020 Fund - Class K6 | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
Fidelity Managed Retirement 2020 Fund - Class K6 | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
Fidelity Managed Retirement 2020 Fund - Class K6 | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity Managed Retirement 2020 Fund - Class K6 | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 62.70%
Fidelity Managed Retirement 2020 Fund - Class K6 | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 17.20%
Fidelity Managed Retirement 2020 Fund - Class K6 | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 17.20%
Fidelity Managed Retirement 2020 Fund - Class K6 | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Managed Retirement 2020 Fund - Class K6 | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Managed Retirement 2020 Fund - Class K | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.30%
Fidelity Managed Retirement 2020 Fund - Class K | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
Fidelity Managed Retirement 2020 Fund - Class K | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.00%
Fidelity Managed Retirement 2020 Fund - Class K | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
Fidelity Managed Retirement 2020 Fund - Class K | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
Fidelity Managed Retirement 2020 Fund - Class K | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
Fidelity Managed Retirement 2020 Fund - Class K | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
Fidelity Managed Retirement 2020 Fund - Class K | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
Fidelity Managed Retirement 2020 Fund - Class K | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
Fidelity Managed Retirement 2020 Fund - Class K | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity Managed Retirement 2020 Fund - Class K | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 62.70%
Fidelity Managed Retirement 2020 Fund - Class K | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 17.20%
Fidelity Managed Retirement 2020 Fund - Class K | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 17.20%
Fidelity Managed Retirement 2020 Fund - Class K | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Managed Retirement 2020 Fund - Class K | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor Managed Retirement 2020 Fund - Class I | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.30%
Fidelity Advisor Managed Retirement 2020 Fund - Class I | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
Fidelity Advisor Managed Retirement 2020 Fund - Class I | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.00%
Fidelity Advisor Managed Retirement 2020 Fund - Class I | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
Fidelity Advisor Managed Retirement 2020 Fund - Class I | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
Fidelity Advisor Managed Retirement 2020 Fund - Class I | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
Fidelity Advisor Managed Retirement 2020 Fund - Class I | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
Fidelity Advisor Managed Retirement 2020 Fund - Class I | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
Fidelity Advisor Managed Retirement 2020 Fund - Class I | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
Fidelity Advisor Managed Retirement 2020 Fund - Class I | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity Advisor Managed Retirement 2020 Fund - Class I | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 62.70%
Fidelity Advisor Managed Retirement 2020 Fund - Class I | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 17.20%
Fidelity Advisor Managed Retirement 2020 Fund - Class I | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 17.20%
Fidelity Advisor Managed Retirement 2020 Fund - Class I | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Advisor Managed Retirement 2020 Fund - Class I | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor Managed Retirement 2020 Fund - Class A | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.30%
Fidelity Advisor Managed Retirement 2020 Fund - Class A | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
Fidelity Advisor Managed Retirement 2020 Fund - Class A | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.00%
Fidelity Advisor Managed Retirement 2020 Fund - Class A | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
Fidelity Advisor Managed Retirement 2020 Fund - Class A | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
Fidelity Advisor Managed Retirement 2020 Fund - Class A | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
Fidelity Advisor Managed Retirement 2020 Fund - Class A | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
Fidelity Advisor Managed Retirement 2020 Fund - Class A | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
Fidelity Advisor Managed Retirement 2020 Fund - Class A | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
Fidelity Advisor Managed Retirement 2020 Fund - Class A | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity Advisor Managed Retirement 2020 Fund - Class A | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 62.70%
Fidelity Advisor Managed Retirement 2020 Fund - Class A | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 17.20%
Fidelity Advisor Managed Retirement 2020 Fund - Class A | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 17.20%
Fidelity Advisor Managed Retirement 2020 Fund - Class A | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Advisor Managed Retirement 2020 Fund - Class A | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Managed Retirement 2015 Fund | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 16.40%
Fidelity Managed Retirement 2015 Fund | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.60%
Fidelity Managed Retirement 2015 Fund | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.80%
Fidelity Managed Retirement 2015 Fund | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
Fidelity Managed Retirement 2015 Fund | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
Fidelity Managed Retirement 2015 Fund | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Managed Retirement 2015 Fund | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Managed Retirement 2015 Fund | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
Fidelity Managed Retirement 2015 Fund | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Fidelity Managed Retirement 2015 Fund | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Managed Retirement 2015 Fund | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 67.30%
Fidelity Managed Retirement 2015 Fund | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 14.60%
Fidelity Managed Retirement 2015 Fund | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 13.20%
Fidelity Managed Retirement 2015 Fund | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Managed Retirement 2015 Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Managed Retirement 2015 Fund - Class K6 | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 16.40%
Fidelity Managed Retirement 2015 Fund - Class K6 | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.60%
Fidelity Managed Retirement 2015 Fund - Class K6 | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.80%
Fidelity Managed Retirement 2015 Fund - Class K6 | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
Fidelity Managed Retirement 2015 Fund - Class K6 | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
Fidelity Managed Retirement 2015 Fund - Class K6 | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Managed Retirement 2015 Fund - Class K6 | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Managed Retirement 2015 Fund - Class K6 | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
Fidelity Managed Retirement 2015 Fund - Class K6 | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Fidelity Managed Retirement 2015 Fund - Class K6 | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Managed Retirement 2015 Fund - Class K6 | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 67.30%
Fidelity Managed Retirement 2015 Fund - Class K6 | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 14.60%
Fidelity Managed Retirement 2015 Fund - Class K6 | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 13.20%
Fidelity Managed Retirement 2015 Fund - Class K6 | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Managed Retirement 2015 Fund - Class K6 | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Managed Retirement 2015 Fund - Class K | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 16.40%
Fidelity Managed Retirement 2015 Fund - Class K | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.60%
Fidelity Managed Retirement 2015 Fund - Class K | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.80%
Fidelity Managed Retirement 2015 Fund - Class K | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
Fidelity Managed Retirement 2015 Fund - Class K | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
Fidelity Managed Retirement 2015 Fund - Class K | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Managed Retirement 2015 Fund - Class K | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Managed Retirement 2015 Fund - Class K | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
Fidelity Managed Retirement 2015 Fund - Class K | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Fidelity Managed Retirement 2015 Fund - Class K | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Managed Retirement 2015 Fund - Class K | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 67.30%
Fidelity Managed Retirement 2015 Fund - Class K | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 14.60%
Fidelity Managed Retirement 2015 Fund - Class K | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 13.20%
Fidelity Managed Retirement 2015 Fund - Class K | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Managed Retirement 2015 Fund - Class K | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor Managed Retirement 2015 Fund - Class I | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 16.40%
Fidelity Advisor Managed Retirement 2015 Fund - Class I | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.60%
Fidelity Advisor Managed Retirement 2015 Fund - Class I | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.80%
Fidelity Advisor Managed Retirement 2015 Fund - Class I | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
Fidelity Advisor Managed Retirement 2015 Fund - Class I | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
Fidelity Advisor Managed Retirement 2015 Fund - Class I | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Advisor Managed Retirement 2015 Fund - Class I | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor Managed Retirement 2015 Fund - Class I | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
Fidelity Advisor Managed Retirement 2015 Fund - Class I | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Fidelity Advisor Managed Retirement 2015 Fund - Class I | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Advisor Managed Retirement 2015 Fund - Class I | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 67.30%
Fidelity Advisor Managed Retirement 2015 Fund - Class I | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 14.60%
Fidelity Advisor Managed Retirement 2015 Fund - Class I | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 13.20%
Fidelity Advisor Managed Retirement 2015 Fund - Class I | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Advisor Managed Retirement 2015 Fund - Class I | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor Managed Retirement 2015 Fund - Class A | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 16.40%
Fidelity Advisor Managed Retirement 2015 Fund - Class A | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.60%
Fidelity Advisor Managed Retirement 2015 Fund - Class A | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.80%
Fidelity Advisor Managed Retirement 2015 Fund - Class A | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
Fidelity Advisor Managed Retirement 2015 Fund - Class A | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
Fidelity Advisor Managed Retirement 2015 Fund - Class A | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Advisor Managed Retirement 2015 Fund - Class A | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor Managed Retirement 2015 Fund - Class A | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
Fidelity Advisor Managed Retirement 2015 Fund - Class A | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
Fidelity Advisor Managed Retirement 2015 Fund - Class A | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Advisor Managed Retirement 2015 Fund - Class A | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 67.30%
Fidelity Advisor Managed Retirement 2015 Fund - Class A | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 14.60%
Fidelity Advisor Managed Retirement 2015 Fund - Class A | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 13.20%
Fidelity Advisor Managed Retirement 2015 Fund - Class A | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Advisor Managed Retirement 2015 Fund - Class A | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Managed Retirement 2010 Fund | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 20.30%
Fidelity Managed Retirement 2010 Fund | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 13.40%
Fidelity Managed Retirement 2010 Fund | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
Fidelity Managed Retirement 2010 Fund | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
Fidelity Managed Retirement 2010 Fund | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
Fidelity Managed Retirement 2010 Fund | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Managed Retirement 2010 Fund | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Fidelity Managed Retirement 2010 Fund | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
Fidelity Managed Retirement 2010 Fund | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Managed Retirement 2010 Fund | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Managed Retirement 2010 Fund | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 71.80%
Fidelity Managed Retirement 2010 Fund | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
Fidelity Managed Retirement 2010 Fund | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
Fidelity Managed Retirement 2010 Fund | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
Fidelity Managed Retirement 2010 Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Managed Retirement 2010 Fund - Class K6 | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 20.30%
Fidelity Managed Retirement 2010 Fund - Class K6 | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 13.40%
Fidelity Managed Retirement 2010 Fund - Class K6 | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
Fidelity Managed Retirement 2010 Fund - Class K6 | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
Fidelity Managed Retirement 2010 Fund - Class K6 | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
Fidelity Managed Retirement 2010 Fund - Class K6 | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Managed Retirement 2010 Fund - Class K6 | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Fidelity Managed Retirement 2010 Fund - Class K6 | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
Fidelity Managed Retirement 2010 Fund - Class K6 | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Managed Retirement 2010 Fund - Class K6 | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Managed Retirement 2010 Fund - Class K6 | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 71.80%
Fidelity Managed Retirement 2010 Fund - Class K6 | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
Fidelity Managed Retirement 2010 Fund - Class K6 | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
Fidelity Managed Retirement 2010 Fund - Class K6 | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
Fidelity Managed Retirement 2010 Fund - Class K6 | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Managed Retirement 2010 Fund - Class K | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 20.30%
Fidelity Managed Retirement 2010 Fund - Class K | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 13.40%
Fidelity Managed Retirement 2010 Fund - Class K | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
Fidelity Managed Retirement 2010 Fund - Class K | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
Fidelity Managed Retirement 2010 Fund - Class K | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
Fidelity Managed Retirement 2010 Fund - Class K | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Managed Retirement 2010 Fund - Class K | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Fidelity Managed Retirement 2010 Fund - Class K | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
Fidelity Managed Retirement 2010 Fund - Class K | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Managed Retirement 2010 Fund - Class K | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Managed Retirement 2010 Fund - Class K | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 71.80%
Fidelity Managed Retirement 2010 Fund - Class K | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
Fidelity Managed Retirement 2010 Fund - Class K | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
Fidelity Managed Retirement 2010 Fund - Class K | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
Fidelity Managed Retirement 2010 Fund - Class K | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor Managed Retirement 2010 Fund - Class I | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 20.30%
Fidelity Advisor Managed Retirement 2010 Fund - Class I | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 13.40%
Fidelity Advisor Managed Retirement 2010 Fund - Class I | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
Fidelity Advisor Managed Retirement 2010 Fund - Class I | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
Fidelity Advisor Managed Retirement 2010 Fund - Class I | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
Fidelity Advisor Managed Retirement 2010 Fund - Class I | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Advisor Managed Retirement 2010 Fund - Class I | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Fidelity Advisor Managed Retirement 2010 Fund - Class I | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
Fidelity Advisor Managed Retirement 2010 Fund - Class I | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Advisor Managed Retirement 2010 Fund - Class I | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Advisor Managed Retirement 2010 Fund - Class I | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 71.80%
Fidelity Advisor Managed Retirement 2010 Fund - Class I | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
Fidelity Advisor Managed Retirement 2010 Fund - Class I | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
Fidelity Advisor Managed Retirement 2010 Fund - Class I | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
Fidelity Advisor Managed Retirement 2010 Fund - Class I | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor Managed Retirement 2010 Fund - Class A | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 20.30%
Fidelity Advisor Managed Retirement 2010 Fund - Class A | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 13.40%
Fidelity Advisor Managed Retirement 2010 Fund - Class A | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
Fidelity Advisor Managed Retirement 2010 Fund - Class A | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
Fidelity Advisor Managed Retirement 2010 Fund - Class A | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
Fidelity Advisor Managed Retirement 2010 Fund - Class A | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
Fidelity Advisor Managed Retirement 2010 Fund - Class A | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
Fidelity Advisor Managed Retirement 2010 Fund - Class A | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
Fidelity Advisor Managed Retirement 2010 Fund - Class A | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Advisor Managed Retirement 2010 Fund - Class A | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Advisor Managed Retirement 2010 Fund - Class A | AABondFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 71.80%
Fidelity Advisor Managed Retirement 2010 Fund - Class A | AAInternationalEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
Fidelity Advisor Managed Retirement 2010 Fund - Class A | AADomesticEquityFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
Fidelity Advisor Managed Retirement 2010 Fund - Class A | AAShortTermFundsMember  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
Fidelity Advisor Managed Retirement 2010 Fund - Class A | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity GNMA Fund | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 73.50%
Fidelity GNMA Fund | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 28.80%
Fidelity GNMA Fund | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
Fidelity GNMA Fund | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Fidelity GNMA Fund | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
Fidelity GNMA Fund | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
Fidelity GNMA Fund | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
Fidelity GNMA Fund | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity GNMA Fund | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity GNMA Fund | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity GNMA Fund | CD0Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity GNMA Fund | CD1Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity GNMA Fund | CD2Member  
Holdings [Line Items]  
Percent of Net Asset Value 37.80%
Fidelity GNMA Fund | CD3Member  
Holdings [Line Items]  
Percent of Net Asset Value 28.30%
Fidelity GNMA Fund | CD4Member  
Holdings [Line Items]  
Percent of Net Asset Value 16.30%
Fidelity GNMA Fund | CD5Member  
Holdings [Line Items]  
Percent of Net Asset Value 17.60%
Fidelity GNMA Fund | CD6Member  
Holdings [Line Items]  
Percent of Net Asset Value 17.10%
Fidelity GNMA Fund | CD7Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity GNMA Fund | CD8Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity GNMA Fund | CD9Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity GNMA Fund | AAUSGovernmentAgencyMortgageSecuritiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 102.70%
Fidelity GNMA Fund | AACMOsandOtherMortgageRelatedSecuritiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 12.30%
Fidelity GNMA Fund | AAUSTreasuryObligationsMember  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Fidelity GNMA Fund | AAOptionsMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%