Risk/Return Summary - FidelityConvertibleSecuritiesFund-AMCIZPRO - FidelityConvertibleSecuritiesFund-AMCIZPRO - Fidelity Convertible Securities Fund	Jan. 29, 2025
Risk Lose Money [Text]
Prospectus Line Items
Risk Text Block	You could lose money by investing in the fund.
Risk Not Insured Depository Institution [Text]
Prospectus Line Items
Risk Text Block	An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency .
InterestRateChangesMember
Prospectus Line Items
Risk Text Block	Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.
ForeignExposureMember
Prospectus Line Items
Risk Text Block	Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market.
IssuerSpecificChangesMember
Prospectus Line Items
Risk Text Block	Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments and can be difficult to resell.
StockMarketVolatilityMember
Prospectus Line Items
Risk Text Block	Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

Risk/Return Summary - FidelityConvertibleSecuritiesFund-AMCIZPRO - FidelityConvertibleSecuritiesFund-AMCIZPRO - Fidelity Convertible Securities Fund

Jan. 29, 2025

You could lose money by investing in the fund.

Risk Not Insured Depository Institution [Text]

Prospectus Line Items

Risk Text Block

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency .

InterestRateChangesMember

Prospectus Line Items

Risk Text Block

Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

ForeignExposureMember

Prospectus Line Items

Risk Text Block

Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market.

IssuerSpecificChangesMember

Prospectus Line Items

Risk Text Block

Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments and can be difficult to resell.

StockMarketVolatilityMember

Prospectus Line Items

Risk Text Block

Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.