v3.26.3
Risk/Return Detail Data - FidelityBalancedFund-AMCIZPRO - USD ($)
 12 Months Ended 24 Months Ended 60 Months Ended 84 Months Ended 120 Months Ended
Oct. 30, 2026
Oct. 30, 2026
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Oct. 30, 2026
Oct. 30, 2026
Oct. 30, 2026
Oct. 30, 2026
FidelityBalancedFund-KPRO | Fidelity Balanced Fund | Fidelity Balanced Fund - Class K                                
Prospectus Line Items                                
Management Fees (as a percentage of Assets) 0.38%                              
Distribution and Service (12b-1) Fees 0.00%                              
Other Expenses (as a percentage of Assets): 0.00%                              
Expenses (as a percentage of Assets) 0.38%                              
Expense Example, with Redemption, 1 Year $ 39                              
Expense Example, with Redemption, 3 Years 122                              
Expense Example, with Redemption, 5 Years 213                              
Expense Example, with Redemption, 10 Years $ 480                              
Average Annual Return, Label [Optional Text]   Class K                            
Average Annual Return, Percent   15.26%                       9.57%   11.19%
Annual Return [Percent]     15.26% 16.13% 21.68% (18.12%) 18.41% 22.48% 24.48% (3.94%) 16.60% 7.12%        
FidelityBalancedFund-KPRO | Fidelity Balanced Fund                                
Prospectus Line Items                                
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Balanced Fund /K                                
Objective [Heading] Investment Objective                              
Objective, Primary [Text Block] Fidelity® Balanced Fund seeks both income and capital growth.                              
Expense Heading [Optional Text] Fee Table                              
Expense Narrative [Text Block] The following table describes the fees and expenses that may be incurred when you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.                              
Shareholder Fees Caption [Optional Text] Shareholder fees                              
Shareholder Fee, Other $ 0                              
Operating Expenses Caption [Optional Text] Annual Operating Expenses                              
Portfolio Turnover [Heading] Portfolio Turnover                              
Portfolio Turnover [Text Block] The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 36 % of the average value of its portfolio.                              
Portfolio Turnover, Rate 36.00%                              
Expense Example Narrative [Text Block] This example helps compare the cost of investing in the fund with the cost of investing in other funds. Let's say, hypothetically, that the annual return for shares of the fund is 5% and that the fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:                              
Strategy [Heading] Principal Investment Strategies                              
Strategy Narrative [Text Block] Investing approximately 60% of assets in stocks and other equity securities and the remainder in bonds and other debt securities, including lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds), when its outlook is neutral. Investing at least 25% of total assets in fixed-income senior securities. Investing in domestic and foreign issuers. With respect to the fund's equity investments, allocating the fund's assets across different market sectors (at present, communication services, consumer discretionary, consumer staples, energy, financials, health care, industrials, information technology, materials, real estate, and utilities), using different Fidelity managers. With respect to the fund's equity investments, investing in either "growth" stocks or "value" stocks or both. Using fundamental analysis of factors such as each issuer's financial condition and industry position, as well as market and economic conditions, to select investments. Investing in Fidelity's Central funds (specialized investment vehicles used by Fidelity® funds to invest in particular security types or investment disciplines) consistent with the asset classes discussed above.                              
Bar Chart and Performance Table [Heading] Performance                              
Performance Narrative [Text Block] The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The hypothetical composite of market indexes has characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance is not an indication of future performance. Visit www.401k.com and log in for more recent performance information.                              
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time.                              
Performance Availability Website Address [Text] www.401k.com                              
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future performance.                              
Bar Chart [Heading] Year-by-Year Returns                              
Year to Date Return, Label [Optional Text]    Year-to-Date Return                              
Bar Chart, Year to Date Return, Date Sep. 30, 2026                              
Bar Chart, Year to Date Return 10.56%                              
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                              
Highest Quarterly Return, Date Jun. 30, 2020                              
Highest Quarterly Return 18.37%                              
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                              
Lowest Quarterly Return, Date Jun. 30, 2022                              
Lowest Quarterly Return (13.83%)                              
Performance Table Heading Average Annual Returns                              
FidelityBalancedFund-KPRO | Fidelity Balanced Fund | SP001                                
Prospectus Line Items                                
Average Annual Return, Label [Optional Text]   S&P 500® Index                            
Average Annual Return, Percent   17.88%                       14.42%   14.82%
FidelityBalancedFund-KPRO | Fidelity Balanced Fund | F0408                                
Prospectus Line Items                                
Average Annual Return, Label [Optional Text]   Fidelity Balanced Hybrid Composite Index℠                            
Average Annual Return, Percent   13.70%                       8.47%   9.78%
FidelityBalancedK6Fund-PRO | Fidelity Balanced K6 Fund | Fidelity Balanced K6 Fund                                
Prospectus Line Items                                
Management Fees (as a percentage of Assets) 0.32%                              
Distribution and Service (12b-1) Fees 0.00%                              
Other Expenses (as a percentage of Assets): 0.00%                              
Expenses (as a percentage of Assets) 0.32%                              
Expense Example, with Redemption, 1 Year $ 33                              
Expense Example, with Redemption, 3 Years 103                              
Expense Example, with Redemption, 5 Years 180                              
Expense Example, with Redemption, 10 Years $ 406                              
Annual Return, Inception Date Jun. 14, 2019                              
Average Annual Return, Label [Optional Text]   Fidelity® Balanced K6 Fund                            
Average Annual Return, Percent   15.76%                       9.81% 12.53% [1]  
Annual Return [Percent]     15.76% 16.17% 21.93% (17.83%) 18.51% 22.75%                
FidelityBalancedK6Fund-PRO | Fidelity Balanced K6 Fund                                
Prospectus Line Items                                
Risk/Return [Heading] Fund Summary Fund: Fidelity® Balanced K6 Fund                              
Objective [Heading] Investment Objective                              
Objective, Primary [Text Block] Fidelity® Balanced K6 Fund seeks income and capital growth consistent with reasonable risk.                              
Expense Heading [Optional Text] Fee Table                              
Expense Narrative [Text Block] The following table describes the fees and expenses that may be incurred when you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions, which are not reflected in the tables and examples below.                              
Shareholder Fees Caption [Optional Text] Shareholder fees                              
Shareholder Fee, Other $ 0                              
Operating Expenses Caption [Optional Text] Annual Operating Expenses                              
Portfolio Turnover [Heading] Portfolio Turnover                              
Portfolio Turnover [Text Block] The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 39 % of the average value of its portfolio.                              
Portfolio Turnover, Rate 39.00%                              
Expense Example Narrative [Text Block] This example helps compare the cost of investing in the fund with the cost of investing in other funds. Let's say, hypothetically, that the annual return for shares of the fund is 5% and that the fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:                              
Strategy [Heading] Principal Investment Strategies                              
Strategy Narrative [Text Block] Investing approximately 60% of assets in stocks and other equity securities and the remainder in bonds and other debt securities, including lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds), when its outlook is neutral. Investing at least 25% of total assets in fixed-income senior securities. Investing in domestic and foreign issuers. With respect to the fund's equity investments, allocating the fund's assets across different market sectors (at present, communication services, consumer discretionary, consumer staples, energy, financials, health care, industrials, information technology, materials, real estate, and utilities), using different Fidelity managers. With respect to the fund's equity investments, investing in either "growth" stocks or "value" stocks or both. Using fundamental analysis of factors such as each issuer's financial condition and industry position, as well as market and economic conditions, to select investments. Investing in Fidelity's Central funds (specialized investment vehicles used by Fidelity® funds to invest in particular security types or investment disciplines) consistent with the asset classes discussed above.                              
Bar Chart and Performance Table [Heading] Performance                              
Performance Narrative [Text Block] The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The hypothetical composite of market indexes has characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance is not an indication of future performance. Visit www.401k.com and log in for more recent performance information.                              
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time.                              
Performance Availability Website Address [Text] www.401k.com                              
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future performance.                              
Bar Chart [Heading] Year-by-Year Returns                              
Year to Date Return, Label [Optional Text]    Year-to-Date Return                              
Bar Chart, Year to Date Return, Date Sep. 30, 2026                              
Bar Chart, Year to Date Return 10.84%                              
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                              
Highest Quarterly Return, Date Jun. 30, 2020                              
Highest Quarterly Return 18.08%                              
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                              
Lowest Quarterly Return, Date Jun. 30, 2022                              
Lowest Quarterly Return (13.78%)                              
Performance Table Heading Average Annual Returns                              
FidelityBalancedK6Fund-PRO | Fidelity Balanced K6 Fund | SP001                                
Prospectus Line Items                                
Average Annual Return, Label [Optional Text]   S&P 500® Index                            
Average Annual Return, Percent   17.88%                       14.42% 15.87%  
FidelityBalancedK6Fund-PRO | Fidelity Balanced K6 Fund | F0408                                
Prospectus Line Items                                
Average Annual Return, Label [Optional Text]   Fidelity Balanced Hybrid Composite Index℠                            
Average Annual Return, Percent   13.70%                       8.47% 10.12%  
FidelityPuritanFund-RetailPRO | Fidelity Puritan Fund | Fidelity Puritan Fund                                
Prospectus Line Items                                
Management Fees (as a percentage of Assets) 0.44%                              
Distribution and Service (12b-1) Fees 0.00%                              
Other Expenses (as a percentage of Assets): 0.01%                              
Acquired Fund Fees and Expenses [2] 0.02%                              
Expenses (as a percentage of Assets) [2] 0.47%                              
Expense Example, with Redemption, 1 Year $ 48                              
Expense Example, with Redemption, 3 Years 151                              
Expense Example, with Redemption, 5 Years 263                              
Expense Example, with Redemption, 10 Years $ 591                              
Average Annual Return, Label [Optional Text]   Return Before Taxes                            
Average Annual Return, Percent   12.30%                       9.57%   10.68%
Annual Return [Percent]     12.30% 18.85% 20.22% (17.24%) 18.94% 20.56% 21.25% (4.16%) 18.74% 5.03%        
FidelityPuritanFund-RetailPRO | Fidelity Puritan Fund                                
Prospectus Line Items                                
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Puritan® Fund /Fidelity® Puritan® Fund                              
Objective [Heading] Investment Objective                              
Objective, Primary [Text Block] Fidelity® Puritan® Fund seeks income and capital growth consistent with reasonable risk.                              
Expense Heading [Optional Text] Fee Table                              
Expense Narrative [Text Block] The following table describes the fees and expenses that may be incurred when you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.                              
Shareholder Fees Caption [Optional Text] Shareholder fees                              
Shareholder Fee, Other $ 0                              
Operating Expenses Caption [Optional Text] Annual Operating Expenses                              
Portfolio Turnover [Heading] Portfolio Turnover                              
Portfolio Turnover [Text Block] The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 66 % of the average value of its portfolio.                              
Portfolio Turnover, Rate 66.00%                              
Expense Example Narrative [Text Block] This example helps compare the cost of investing in the fund with the cost of investing in other funds. Let's say, hypothetically, that the annual return for shares of the fund is 5% and that the fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:                              
Strategy [Heading] Principal Investment Strategies                              
Strategy Narrative [Text Block] Investing approximately 60% of assets in stocks and other equity securities and the remainder in bonds and other debt securities, including lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds), when its outlook is neutral. Investing at least 25% of total assets in fixed-income senior securities. Investing in domestic and foreign issuers. With respect to the fund's equity investments, investing in either "growth" stocks or "value" stocks or both. Using fundamental analysis of factors such as each issuer's financial condition and industry position, as well as market and economic conditions, to select investments. Investing in Fidelity's Central funds (specialized investment vehicles used by Fidelity® funds to invest in particular security types or investment disciplines) consistent with the asset classes discussed above.                              
Bar Chart and Performance Table [Heading] Performance                              
Performance Narrative [Text Block] The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The hypothetical composite of market indexes has characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance. Visit www.fidelity.com for more recent performance information.                              
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time.                              
Performance Availability Website Address [Text] www.fidelity.com                              
Performance Past Does Not Indicate Future [Text] Past performance (before and after taxes) is not an indication of future performance.                              
Bar Chart [Heading] Year-by-Year Returns                              
Year to Date Return, Label [Optional Text]    Year-to-Date Return                              
Bar Chart, Year to Date Return, Date Sep. 30, 2026                              
Bar Chart, Year to Date Return 9.54%                              
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                              
Highest Quarterly Return, Date Jun. 30, 2020                              
Highest Quarterly Return 16.94%                              
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                              
Lowest Quarterly Return, Date Jun. 30, 2022                              
Lowest Quarterly Return (12.74%)                              
Performance Table Heading Average Annual Returns                              
Performance Table Uses Highest Federal Rate After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes.                              
Performance Table Not Relevant to Tax Deferred The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).                              
Performance Table Explanation after Tax Higher Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.                              
Performance Table Narrative After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.                              
FidelityPuritanFund-RetailPRO | Fidelity Puritan Fund | After Taxes on Distributions | Fidelity Puritan Fund                                
Prospectus Line Items                                
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                            
Average Annual Return, Percent   10.26%                       7.03%   8.53%
FidelityPuritanFund-RetailPRO | Fidelity Puritan Fund | After Taxes on Distributions and Sales | Fidelity Puritan Fund                                
Prospectus Line Items                                
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions and Sale of Fund Shares                            
Average Annual Return, Percent   8.24%                       6.91%   8.08%
FidelityPuritanFund-RetailPRO | Fidelity Puritan Fund | F1298                                
Prospectus Line Items                                
Average Annual Return, Label [Optional Text]   Fidelity Puritan Composite Index℠                            
Average Annual Return, Percent   13.70%                       8.47%   9.78%
FidelityPuritanFund-RetailPRO | Fidelity Puritan Fund | SP001                                
Prospectus Line Items                                
Average Annual Return, Label [Optional Text]   S&P 500® Index                            
Average Annual Return, Percent   17.88%                       14.42%   14.82%
FidelityBalancedFund-RetailPRO | Fidelity Balanced Fund | Fidelity Balanced Fund                                
Prospectus Line Items                                
Management Fees (as a percentage of Assets) 0.44%                              
Distribution and Service (12b-1) Fees 0.00%                              
Other Expenses (as a percentage of Assets): 0.00%                              
Expenses (as a percentage of Assets) 0.44%                              
Expense Example, with Redemption, 1 Year $ 45                              
Expense Example, with Redemption, 3 Years 141                              
Expense Example, with Redemption, 5 Years 246                              
Expense Example, with Redemption, 10 Years $ 555                              
Average Annual Return, Label [Optional Text]   Return Before Taxes                            
Average Annual Return, Percent   15.18%                       9.48%   11.11%
Annual Return [Percent]     15.18% 16.06% 21.60% (18.19%) 18.28% 22.43% 24.39% (4.02%) 16.50% 7.01%        
FidelityBalancedFund-RetailPRO | Fidelity Balanced Fund                                
Prospectus Line Items                                
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Balanced Fund /Fidelity® Balanced Fund                              
Objective [Heading] Investment Objective                              
Objective, Primary [Text Block] Fidelity® Balanced Fund seeks both income and capital growth.                              
Expense Heading [Optional Text] Fee Table                              
Expense Narrative [Text Block] The following table describes the fees and expenses that may be incurred when you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.                              
Shareholder Fees Caption [Optional Text] Shareholder fees                              
Shareholder Fee, Other $ 0                              
Operating Expenses Caption [Optional Text] Annual Operating Expenses                              
Portfolio Turnover [Heading] Portfolio Turnover                              
Portfolio Turnover [Text Block] The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 36 % of the average value of its portfolio.                              
Portfolio Turnover, Rate 36.00%                              
Expense Example Narrative [Text Block] This example helps compare the cost of investing in the fund with the cost of investing in other funds. Let's say, hypothetically, that the annual return for shares of the fund is 5% and that the fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:                              
Strategy [Heading] Principal Investment Strategies                              
Strategy Narrative [Text Block] Investing approximately 60% of assets in stocks and other equity securities and the remainder in bonds and other debt securities, including lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds), when its outlook is neutral. Investing at least 25% of total assets in fixed-income senior securities. Investing in domestic and foreign issuers. With respect to the fund's equity investments, allocating the fund's assets across different market sectors (at present, communication services, consumer discretionary, consumer staples, energy, financials, health care, industrials, information technology, materials, real estate, and utilities), using different Fidelity managers. With respect to the fund's equity investments, investing in either "growth" stocks or "value" stocks or both. Using fundamental analysis of factors such as each issuer's financial condition and industry position, as well as market and economic conditions, to select investments. Investing in Fidelity's Central funds (specialized investment vehicles used by Fidelity® funds to invest in particular security types or investment disciplines) consistent with the asset classes discussed above.                              
Bar Chart and Performance Table [Heading] Performance                              
Performance Narrative [Text Block] The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The hypothetical composite of market indexes has characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance. Visit www.fidelity.com for more recent performance information.                              
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time.                              
Performance Availability Website Address [Text] www.fidelity.com                              
Performance Past Does Not Indicate Future [Text] Past performance (before and after taxes) is not an indication of future performance.                              
Bar Chart [Heading] Year-by-Year Returns                              
Year to Date Return, Label [Optional Text]    Year-to-Date Return                              
Bar Chart, Year to Date Return, Date Sep. 30, 2026                              
Bar Chart, Year to Date Return 10.50%                              
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                              
Highest Quarterly Return, Date Jun. 30, 2020                              
Highest Quarterly Return 18.30%                              
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                              
Lowest Quarterly Return, Date Mar. 31, 2020                              
Lowest Quarterly Return (13.82%)                              
Performance Table Heading Average Annual Returns                              
Performance Table Uses Highest Federal Rate After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes.                              
Performance Table Not Relevant to Tax Deferred The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).                              
Performance Table Explanation after Tax Higher Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.                              
Performance Table Narrative After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.                              
FidelityBalancedFund-RetailPRO | Fidelity Balanced Fund | After Taxes on Distributions | Fidelity Balanced Fund                                
Prospectus Line Items                                
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                            
Average Annual Return, Percent   13.34%                       7.56%   9.19%
FidelityBalancedFund-RetailPRO | Fidelity Balanced Fund | After Taxes on Distributions and Sales | Fidelity Balanced Fund                                
Prospectus Line Items                                
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions and Sale of Fund Shares                            
Average Annual Return, Percent   9.73%                       6.91%   8.42%
FidelityBalancedFund-RetailPRO | Fidelity Balanced Fund | SP001                                
Prospectus Line Items                                
Average Annual Return, Label [Optional Text]   S&P 500® Index                            
Average Annual Return, Percent   17.88%                       14.42%   14.82%
FidelityBalancedFund-RetailPRO | Fidelity Balanced Fund | F0408                                
Prospectus Line Items                                
Average Annual Return, Label [Optional Text]   Fidelity Balanced Hybrid Composite Index℠                            
Average Annual Return, Percent   13.70%                       8.47%   9.78%
FidelityBalancedFund-AMCIZPRO | Fidelity Balanced Fund | Fidelity Advisor Balanced Fund - Class A                                
Prospectus Line Items                                
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 5.75%                              
Maximum Deferred Sales Charge (as a percentage) [3] 0.00%                              
Management Fees (as a percentage of Assets) 0.49%                              
Distribution and Service (12b-1) Fees 0.25%                              
Other Expenses (as a percentage of Assets): 0.00%                              
Expenses (as a percentage of Assets) 0.74%                              
Expense Example, with Redemption, 1 Year $ 646                              
Expense Example, with Redemption, 3 Years 798                              
Expense Example, with Redemption, 5 Years 963                              
Expense Example, with Redemption, 10 Years 1,441                              
Expense Example, No Redemption, 1 Year 646                              
Expense Example, No Redemption, 3 Years 798                              
Expense Example, No Redemption, 5 Years 963                              
Expense Example, No Redemption, 10 Years $ 1,441                              
Annual Return, Inception Date Oct. 18, 2024                              
Average Annual Return, Label [Optional Text]   Return Before Taxes                            
Average Annual Return, Percent   8.27%                     6.51% [4]      
Annual Return [Percent]     14.88%                          
FidelityBalancedFund-AMCIZPRO | Fidelity Balanced Fund | Fidelity Advisor Balanced Fund - Class M                                
Prospectus Line Items                                
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 3.50%                              
Maximum Deferred Sales Charge (as a percentage) [3] 0.00%                              
Management Fees (as a percentage of Assets) 0.49%                              
Distribution and Service (12b-1) Fees 0.50%                              
Other Expenses (as a percentage of Assets): 0.00%                              
Expenses (as a percentage of Assets) 0.99%                              
Expense Example, with Redemption, 1 Year $ 447                              
Expense Example, with Redemption, 3 Years 654                              
Expense Example, with Redemption, 5 Years 878                              
Expense Example, with Redemption, 10 Years 1,521                              
Expense Example, No Redemption, 1 Year 447                              
Expense Example, No Redemption, 3 Years 654                              
Expense Example, No Redemption, 5 Years 878                              
Expense Example, No Redemption, 10 Years $ 1,521                              
Annual Return, Inception Date Oct. 18, 2024                              
Average Annual Return, Label [Optional Text]   Return Before Taxes                            
Average Annual Return, Percent   10.57%                     8.34% [5]      
FidelityBalancedFund-AMCIZPRO | Fidelity Balanced Fund | Fidelity Advisor Balanced Fund - Class C                                
Prospectus Line Items                                
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                              
Maximum Deferred Sales Charge (as a percentage) [6] 1.00%                              
Management Fees (as a percentage of Assets) 0.49%                              
Distribution and Service (12b-1) Fees 1.00%                              
Other Expenses (as a percentage of Assets): 0.00%                              
Expenses (as a percentage of Assets) 1.49%                              
Expenses Deferred Charges [Text Block] On Class C shares redeemed less than one year after purchase.                              
Expense Example, with Redemption, 1 Year $ 252                              
Expense Example, with Redemption, 3 Years 471                              
Expense Example, with Redemption, 5 Years 813                              
Expense Example, with Redemption, 10 Years 1,576                              
Expense Example, No Redemption, 1 Year 152                              
Expense Example, No Redemption, 3 Years 471                              
Expense Example, No Redemption, 5 Years 813                              
Expense Example, No Redemption, 10 Years $ 1,576                              
Annual Return, Inception Date Oct. 18, 2024                              
Average Annual Return, Label [Optional Text]   Return Before Taxes                            
Average Annual Return, Percent   13.01%                     11.02% [7]      
FidelityBalancedFund-AMCIZPRO | Fidelity Balanced Fund | Fidelity Advisor Balanced Fund - Class I                                
Prospectus Line Items                                
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                              
Maximum Deferred Sales Charge (as a percentage) 0.00%                              
Management Fees (as a percentage of Assets) 0.49%                              
Distribution and Service (12b-1) Fees 0.00%                              
Other Expenses (as a percentage of Assets): 0.00%                              
Expenses (as a percentage of Assets) 0.49%                              
Expense Example, with Redemption, 1 Year $ 50                              
Expense Example, with Redemption, 3 Years 157                              
Expense Example, with Redemption, 5 Years 274                              
Expense Example, with Redemption, 10 Years 616                              
Expense Example, No Redemption, 1 Year 50                              
Expense Example, No Redemption, 3 Years 157                              
Expense Example, No Redemption, 5 Years 274                              
Expense Example, No Redemption, 10 Years $ 616                              
Annual Return, Inception Date Oct. 18, 2024                              
Average Annual Return, Label [Optional Text]   Return Before Taxes                            
Average Annual Return, Percent   15.16%                     12.15% [8]      
FidelityBalancedFund-AMCIZPRO | Fidelity Balanced Fund | Fidelity Advisor Balanced Fund - Class Z                                
Prospectus Line Items                                
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                              
Maximum Deferred Sales Charge (as a percentage) 0.00%                              
Management Fees (as a percentage of Assets) 0.38%                              
Distribution and Service (12b-1) Fees 0.00%                              
Other Expenses (as a percentage of Assets): 0.00%                              
Expenses (as a percentage of Assets) 0.38%                              
Expense Example, with Redemption, 1 Year $ 39                              
Expense Example, with Redemption, 3 Years 122                              
Expense Example, with Redemption, 5 Years 213                              
Expense Example, with Redemption, 10 Years 480                              
Expense Example, No Redemption, 1 Year 39                              
Expense Example, No Redemption, 3 Years 122                              
Expense Example, No Redemption, 5 Years 213                              
Expense Example, No Redemption, 10 Years $ 480                              
Annual Return, Inception Date Oct. 18, 2024                              
Average Annual Return, Label [Optional Text]   Return Before Taxes                            
Average Annual Return, Percent   15.30%                     12.28% [9]      
FidelityBalancedFund-AMCIZPRO | Fidelity Balanced Fund                                
Prospectus Line Items                                
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Balanced Fund /Fidelity Advisor® Balanced Fund A, M, C, I, Z                                
Objective [Heading] Investment Objective                              
Objective, Primary [Text Block] Fidelity® Balanced Fund seeks both income and capital growth.                              
Expense Heading [Optional Text] Fee Table                              
Expense Narrative [Text Block] The following table describes the fees and expenses that may be incurred when you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $ 50,000 in the fund or certain other Fidelity ® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 36 of the prospectus and in the sales charge waiver appendix to the prospectus.                              
Shareholder Fees Caption [Optional Text] Shareholder fees                              
Operating Expenses Caption [Optional Text] Annual Operating Expenses                              
Portfolio Turnover [Heading] Portfolio Turnover                              
Portfolio Turnover [Text Block] The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 36 % of the average value of its portfolio.                              
Portfolio Turnover, Rate 36.00%                              
Expenses Deferred Charges [Text Block] Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% and 0.25%, respectively.                              
Expense Breakpoint Discounts [Text] You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $ 50,000 in the fund or certain other Fidelity ® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 36 of the prospectus                              
Expense Breakpoint, Minimum Investment Required [Amount] $ 50,000                              
Expense Example Narrative [Text Block] This example helps compare the cost of investing in the fund with the cost of investing in other funds. Let's say, hypothetically, that the annual return for shares of the fund is 5% and that the fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated and if you hold your shares:                              
Strategy [Heading] Principal Investment Strategies                              
Strategy Narrative [Text Block] Investing approximately 60% of assets in stocks and other equity securities and the remainder in bonds and other debt securities, including lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds), when its outlook is neutral. Investing at least 25% of total assets in fixed-income senior securities. Investing in domestic and foreign issuers. With respect to the fund's equity investments, allocating the fund's assets across different market sectors (at present, communication services, consumer discretionary, consumer staples, energy, financials, health care, industrials, information technology, materials, real estate, and utilities), using different Fidelity managers. With respect to the fund's equity investments, investing in either "growth" stocks or "value" stocks or both. Using fundamental analysis of factors such as each issuer's financial condition and industry position, as well as market and economic conditions, to select investments. Investing in Fidelity's Central funds (specialized investment vehicles used by Fidelity® funds to invest in particular security types or investment disciplines) consistent with the asset classes discussed above.                              
Bar Chart and Performance Table [Heading] Performance                              
Performance Narrative [Text Block] The following information is intended to help you understand the risks of investing in the fund. The information illustrates the performance of the fund's shares over the past year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The hypothetical composite of market indexes has characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance. Visit institutional .fidelity.com for more recent performance information .                              
Performance Information Illustrates Variability of Returns [Text] The information illustrates the performance of the fund's shares over the past year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time.                              
Performance Availability Website Address [Text] institutional .fidelity.com                              
Performance Past Does Not Indicate Future [Text] Past performance (before and after taxes) is not an indication of future performance.                              
Bar Chart [Heading] Year-by-Year Returns                              
Bar Chart Narrative [Text Block] The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown .                              
Bar Chart Does Not Reflect Sales Loads [Text] The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown .                              
Year to Date Return, Label [Optional Text]    Year-to-Date Return                              
Bar Chart, Year to Date Return, Date Sep. 30, 2026                              
Bar Chart, Year to Date Return 10.22%                              
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                              
Highest Quarterly Return, Date Jun. 30, 2025                              
Highest Quarterly Return 8.19%                              
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                              
Lowest Quarterly Return, Date Mar. 31, 2025                              
Lowest Quarterly Return (2.81%)                              
Performance Table Heading Average Annual Returns                              
Performance Table Does Reflect Sales Loads Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges.                              
Performance Table Uses Highest Federal Rate After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes.                              
Performance Table Not Relevant to Tax Deferred The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).                              
Performance Table One Class of after Tax Shown [Text] After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary.                              
Performance Table Explanation after Tax Higher Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.                              
Performance Table Narrative Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges. After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.                              
FidelityBalancedFund-AMCIZPRO | Fidelity Balanced Fund | After Taxes on Distributions | Fidelity Advisor Balanced Fund - Class A                                
Prospectus Line Items                                
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                            
Average Annual Return, Percent   6.67%                     4.86% [4]      
FidelityBalancedFund-AMCIZPRO | Fidelity Balanced Fund | After Taxes on Distributions and Sales | Fidelity Advisor Balanced Fund - Class A                                
Prospectus Line Items                                
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions and Sale of Fund Shares                            
Average Annual Return, Percent   5.61%                     4.67% [4]      
FidelityBalancedFund-AMCIZPRO | Fidelity Balanced Fund | SP001                                
Prospectus Line Items                                
Average Annual Return, Label [Optional Text]   S&P 500® Index                            
Average Annual Return, Percent   17.88%                     15.19%      
FidelityBalancedFund-AMCIZPRO | Fidelity Balanced Fund | F0408                                
Prospectus Line Items                                
Average Annual Return, Label [Optional Text]   Fidelity Balanced Hybrid Composite Index℠                            
Average Annual Return, Percent   13.70%                     10.96%      
FidelityPuritanFund-KPRO | Fidelity Puritan Fund | Fidelity Puritan Fund - Class K                                
Prospectus Line Items                                
Management Fees (as a percentage of Assets) 0.39%                              
Distribution and Service (12b-1) Fees 0.00%                              
Other Expenses (as a percentage of Assets): 0.00%                              
Acquired Fund Fees and Expenses [10] 0.02%                              
Expenses (as a percentage of Assets) [10] 0.41%                              
Expense Example, with Redemption, 1 Year $ 42                              
Expense Example, with Redemption, 3 Years 132                              
Expense Example, with Redemption, 5 Years 230                              
Expense Example, with Redemption, 10 Years $ 518                              
Average Annual Return, Label [Optional Text]   Class K                            
Average Annual Return, Percent   12.40%                       9.65%   10.78%
Annual Return [Percent]     12.40% 18.94% 20.28% (17.15%) 19.01% 20.68% 21.38% (4.13%) 18.86% 5.20%        
FidelityPuritanFund-KPRO | Fidelity Puritan Fund                                
Prospectus Line Items                                
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Puritan® Fund /K                                
Objective [Heading] Investment Objective                              
Objective, Primary [Text Block] Fidelity® Puritan® Fund seeks income and capital growth consistent with reasonable risk.                              
Expense Heading [Optional Text] Fee Table                              
Expense Narrative [Text Block] The following table describes the fees and expenses that may be incurred when you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.                              
Shareholder Fees Caption [Optional Text] Shareholder fees                              
Shareholder Fee, Other $ 0                              
Operating Expenses Caption [Optional Text] Annual Operating Expenses                              
Portfolio Turnover [Heading] Portfolio Turnover                              
Portfolio Turnover [Text Block] The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 66 % of the average value of its portfolio.                              
Portfolio Turnover, Rate 66.00%                              
Expense Example Narrative [Text Block] This example helps compare the cost of investing in the fund with the cost of investing in other funds. Let's say, hypothetically, that the annual return for shares of the fund is 5% and that the fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:                              
Strategy [Heading] Principal Investment Strategies                              
Strategy Narrative [Text Block] Investing approximately 60% of assets in stocks and other equity securities and the remainder in bonds and other debt securities, including lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds), when its outlook is neutral. Investing at least 25% of total assets in fixed-income senior securities. Investing in domestic and foreign issuers. With respect to the fund's equity investments, investing in either "growth" stocks or "value" stocks or both. Using fundamental analysis of factors such as each issuer's financial condition and industry position, as well as market and economic conditions, to select investments. Investing in Fidelity's Central funds (specialized investment vehicles used by Fidelity® funds to invest in particular security types or investment disciplines) consistent with the asset classes discussed above.                              
Bar Chart and Performance Table [Heading] Performance                              
Performance Narrative [Text Block] The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The hypothetical composite of market indexes has characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance is not an indication of future performance. Visit www.401k.com and log in for more recent performance information.                              
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time.                              
Performance Availability Website Address [Text] www.401k.com                              
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future performance.                              
Bar Chart [Heading] Year-by-Year Returns                              
Year to Date Return, Label [Optional Text]    Year-to-Date Return                              
Bar Chart, Year to Date Return, Date Sep. 30, 2026                              
Bar Chart, Year to Date Return 9.58%                              
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                              
Highest Quarterly Return, Date Jun. 30, 2020                              
Highest Quarterly Return 16.98%                              
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                              
Lowest Quarterly Return, Date Jun. 30, 2022                              
Lowest Quarterly Return (12.73%)                              
Performance Table Heading Average Annual Returns                              
FidelityPuritanFund-KPRO | Fidelity Puritan Fund | F1298                                
Prospectus Line Items                                
Average Annual Return, Label [Optional Text]   Fidelity Puritan Composite Index℠                            
Average Annual Return, Percent   13.70%                       8.47%   9.78%
FidelityPuritanFund-KPRO | Fidelity Puritan Fund | SP001                                
Prospectus Line Items                                
Average Annual Return, Label [Optional Text]   S&P 500® Index                            
Average Annual Return, Percent   17.88%                       14.42%   14.82%
FidelityPuritanK6Fund-PRO | Fidelity Puritan K6 Fund | Fidelity Puritan K6 Fund                                
Prospectus Line Items                                
Management Fees (as a percentage of Assets) 0.32%                              
Distribution and Service (12b-1) Fees 0.00%                              
Other Expenses (as a percentage of Assets): [11] 0.01%                              
Expenses (as a percentage of Assets) [11],[12] 0.33%                              
Expense Example, with Redemption, 1 Year $ 34                              
Expense Example, with Redemption, 3 Years 106                              
Expense Example, with Redemption, 5 Years 185                              
Expense Example, with Redemption, 10 Years $ 418                              
Annual Return, Inception Date Jun. 14, 2019                              
Average Annual Return, Label [Optional Text]   Fidelity® Puritan® K6 Fund                            
Average Annual Return, Percent   11.41%                       9.49% 11.74% [13]  
Annual Return [Percent]     11.41% 18.92% 20.30% (17.11%) 19.11% 20.22%                
FidelityPuritanK6Fund-PRO | Fidelity Puritan K6 Fund                                
Prospectus Line Items                                
Risk/Return [Heading] Fund Summary Fund: Fidelity® Puritan® K6 Fund                              
Objective [Heading] Investment Objective                              
Objective, Primary [Text Block] Fidelity® Puritan® K6 Fund seeks income and capital growth consistent with reasonable risk.                              
Expense Heading [Optional Text] Fee Table                              
Expense Narrative [Text Block] The following table describes the fees and expenses that may be incurred when you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions, which are not reflected in the tables and examples below.                              
Shareholder Fees Caption [Optional Text] Shareholder fees                              
Shareholder Fee, Other $ 0                              
Operating Expenses Caption [Optional Text] Annual Operating Expenses                              
Portfolio Turnover [Heading] Portfolio Turnover                              
Portfolio Turnover [Text Block] The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 70 % of the average value of its portfolio.                              
Portfolio Turnover, Rate 70.00%                              
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses. For the period, acquired fund fees and expenses are less than 0.01% and are included in other expenses.                              
Expense Example Narrative [Text Block] This example helps compare the cost of investing in the fund with the cost of investing in other funds. Let's say, hypothetically, that the annual return for shares of the fund is 5% and that the fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:                              
Strategy [Heading] Principal Investment Strategies                              
Strategy Narrative [Text Block] Investing approximately 60% of assets in stocks and other equity securities and the remainder in bonds and other debt securities, including lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds), when its outlook is neutral. Investing at least 25% of total assets in fixed-income senior securities. Investing in domestic and foreign issuers. With respect to the fund's equity investments, investing in either "growth" stocks or "value" stocks or both. Using fundamental analysis of factors such as each issuer's financial condition and industry position, as well as market and economic conditions, to select investments. Investing in Fidelity's Central funds (specialized investment vehicles used by Fidelity® funds to invest in particular security types or investment disciplines) consistent with the asset classes discussed above.                              
Bar Chart and Performance Table [Heading] Performance                              
Performance Narrative [Text Block] The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The hypothetical composite of market indexes has characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance is not an indication of future performance. Visit www.401k.com and log in for more recent performance information.                              
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time.                              
Performance Availability Website Address [Text] www.401k.com                              
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future performance.                              
Bar Chart [Heading] Year-by-Year Returns                              
Year to Date Return, Label [Optional Text]    Year-to-Date Return                              
Bar Chart, Year to Date Return, Date Sep. 30, 2026                              
Bar Chart, Year to Date Return 8.92%                              
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                              
Highest Quarterly Return, Date Jun. 30, 2020                              
Highest Quarterly Return 17.13%                              
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                              
Lowest Quarterly Return, Date Jun. 30, 2022                              
Lowest Quarterly Return (12.78%)                              
Performance Table Heading Average Annual Returns                              
FidelityPuritanK6Fund-PRO | Fidelity Puritan K6 Fund | F1298                                
Prospectus Line Items                                
Average Annual Return, Label [Optional Text]   Fidelity Puritan Composite Index℠                            
Average Annual Return, Percent   13.70%                       8.47% 10.12%  
FidelityPuritanK6Fund-PRO | Fidelity Puritan K6 Fund | SP001                                
Prospectus Line Items                                
Average Annual Return, Label [Optional Text]   S&P 500® Index                            
Average Annual Return, Percent   17.88%                       14.42% 15.87%  
Document Type 485BPOS                              
Registrant Name Fidelity Puritan Trust                              
[1]
A From June 14, 2019 .
[2]
A Includes interest expense of certain underlying Fidelity ® funds. Excluding interest expense of the applicable underlying Fidelity ® funds, total annual operating expenses are 0.45% .
[3]
A Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% and 0.25%, respectively.
[4]
A From October 18, 2024 .
[5]
B From October 18, 2024 .
[6]
B On Class C shares redeemed less than one year after purchase.
[7]
C From October 18, 2024 .
[8]
D From October 18, 2024 .
[9]
E From October 18, 2024 .
[10]
A Includes interest expense of certain underlying Fidelity ® funds. Excluding interest expense of the applicable underlying Fidelity ® funds, total annual operating expenses are 0.39% .
[11]
A Includes interest expense of certain underlying Fidelity ® funds. Excluding interest expense of the applicable underlying Fidelity ® funds, total annual operating expenses are 0.32%.
[12]
B Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses. For the period, acquired fund fees and expenses are less than 0.01% and are included in other expenses.
[13]
A From June 14, 2019 .