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Risk/Return:rr_RiskReturnAbstract 
Document Typedei_DocumentType485BPOS
Document Period End Datedei_DocumentPeriodEndDateJul. 31, 2011
Registrant Namedei_EntityRegistrantNameFIDELITY PURITAN TRUST
Central Index Keydei_EntityCentralIndexKey0000081205
Amendment Flagdei_AmendmentFlagfalse
Document Creation Datedei_DocumentCreationDateSep. 28, 2011
Document Effective Datedei_DocumentEffectiveDateSep. 29, 2011
Prospectus Daterr_ProspectusDateSep. 29, 2011
Retail | Fidelity Low-Priced Stock Fund
 
Risk/Return:rr_RiskReturnAbstract 
Risk/Return [Heading]rr_RiskReturnHeading
Fund Summary
Fund/Class:
Fidelity® Low-Priced Stock Fund/Fidelity Low-Priced Stock Fund
Objective [Heading]rr_ObjectiveHeadingInvestment Objective
Objective, Primary [Text Block]rr_ObjectivePrimaryTextBlockThe fund seeks capital appreciation.
Fee Tablefpt81205_FundFeesAndExpensesAbstract 
Expense [Heading]rr_ExpenseHeadingFee Table
Expense Narrative [Text Block]rr_ExpenseNarrativeTextBlockThe following table describes the fees and expenses that may be incurred when you buy, hold, or sell shares of the fund.
Shareholder feesrr_ShareholderFeesAbstract 
Shareholder Fees Caption [Text]rr_ShareholderFeesCaptionShareholder fees (fees paid directly from your investment)
Annual class operating expensesrr_OperatingExpensesAbstract 
Operating Expenses Caption [Text]rr_OperatingExpensesCaptionAnnual class operating expenses (expenses that you pay each year as a % of the value of your investment)
Expense Examplerr_ExpenseExampleAbstract 
Expense Example Narrative [Text Block]rr_ExpenseExampleNarrativeTextBlock

This example helps compare the cost of investing in the fund with the cost of investing in other mutual funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder 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:

Portfolio Turnoverfpt81205_PortfolioTurnoverAltAbstract 
Portfolio Turnover [Heading]rr_PortfolioTurnoverHeadingPortfolio Turnover
Portfolio Turnover [Text Block]rr_PortfolioTurnoverTextBlockThe 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 15% of the average value of its portfolio.
Portfolio Turnover, Raterr_PortfolioTurnoverRate15.00%
Strategy [Heading]rr_StrategyHeadingPrincipal Investment Strategies
Strategy Narrative [Text Block]rr_StrategyNarrativeTextBlock
  • Normally investing primarily in common stocks.
  • Normally investing at least 80% of assets in low-priced stocks (those priced at or below $35 per share), which can lead to investments in small and medium-sized companies.
  • Potentially investing in stocks not considered low-priced.
  • Investing in domestic and foreign issuers.
  • 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.
Risk [Heading]rr_RiskHeadingPrincipal Investment Risks
Risk Narrative [Text Block]rr_RiskNarrativeTextBlock
  • 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 can react differently to these developments.
  • 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.
  • 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. The value of securities of smaller issuers can be more volatile than that of larger issuers.

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. You could lose money by investing in the fund.

Risk Not Insured Depository Institution [Text]rr_RiskNotInsuredDepositoryInstitutionAn 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.
Risk Lose Money [Text]rr_RiskLoseMoneyYou could lose money by investing in the fund.
Performancefpt81205_FundPastPerformanceAbstract 
Bar Chart and Performance Table [Heading]rr_BarChartAndPerformanceTableHeadingPerformance
Performance Narrative [Text Block]rr_PerformanceNarrativeTextBlock

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 over various periods of time. The index description appears in the Additional Information about the Index section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit www.fidelity.com for updated return information.

Performance Information Illustrates Variability of Returns [Text]rr_PerformanceInformationIllustratesVariabilityOfReturnsThe 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 over various periods of time.
Performance Past Does Not Indicate Future [Text]rr_PerformancePastDoesNotIndicateFuturePast performance (before and after taxes) is not an indication of future performance.
Performance Availability Website Address [Text]rr_PerformanceAvailabilityWebSiteAddresswww.fidelity.com
Annual Total Returnsrr_BarChartTableAbstract 
Bar Chart [Heading]rr_BarChartHeading

Year-by-Year Returns

Calendar Years

Bar Chart Closing [Text Block]rr_BarChartClosingTextBlock
During the periods shown in the chart:
Returns
Quarter ended
Highest Quarter Return21.60%June 30, 2009
Lowest Quarter Return-20.73%December 31, 2008
Year-to-Date Return8.55%June 30, 2011
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Performance Table Headingrr_PerformanceTableHeadingAverage Annual Returns
Performance Table Narrativerr_PerformanceTableNarrativeTextBlock

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. 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.

For the periods ended
December 31, 2010
Performance Table Uses Highest Federal Raterr_PerformanceTableUsesHighestFederalRateAfter-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 Deferredrr_PerformanceTableNotRelevantToTaxDeferredThe after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement.
Performance Table Explanation after Tax Higherrr_PerformanceTableExplanationAfterTaxHigherReturn 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.
Retail | Fidelity Low-Priced Stock Fund | Class: Fidelity Low-Priced Stock Fund
 
Shareholder feesrr_ShareholderFeesAbstract 
Redemption fee on shares held less than 90 days (as a % of amount redeemed)rr_RedemptionFeeOverRedemption1.50%
Annual class operating expensesrr_OperatingExpensesAbstract 
Management fee (fluctuates based on the fund's performance relative to a securities market index)rr_ManagementFeesOverAssets0.63%
Distribution and/or Service (12b-1) feesrr_DistributionAndService12b1FeesOverAssets none
Other expensesrr_OtherExpensesOverAssets0.20%
Total annual operating expensesrr_ExpensesOverAssets0.83%
Expense Examplerr_ExpenseExampleAbstract 
1 yearrr_ExpenseExampleYear01 85
3 yearsrr_ExpenseExampleYear03265
5 yearsrr_ExpenseExampleYear05460
10 yearsrr_ExpenseExampleYear101,025
Annual Total Returnsrr_BarChartTableAbstract 
2001rr_AnnualReturn200126.71%
2002rr_AnnualReturn2002(6.18%)
2003rr_AnnualReturn200340.85%
2004rr_AnnualReturn200422.24%
2005rr_AnnualReturn20058.65%
2006rr_AnnualReturn200617.76%
2007rr_AnnualReturn20073.16%
2008rr_AnnualReturn2008(36.17%)
2009rr_AnnualReturn200939.08%
2010rr_AnnualReturn201020.70%
Highest Quarterly Return, Labelrr_HighestQuarterlyReturnLabelHighest Quarter Return
Highest Quarterly Returnrr_BarChartHighestQuarterlyReturn21.60%
Highest Quarterly Return, Daterr_BarChartHighestQuarterlyReturnDateJun. 30, 2009
Lowest Quarterly Return, Labelrr_LowestQuarterlyReturnLabelLowest Quarter Return
Lowest Quarterly Returnrr_BarChartLowestQuarterlyReturn(20.73%)
Lowest Quarterly Return, Daterr_BarChartLowestQuarterlyReturnDateDec. 31, 2008
Year to Date Return, Labelrr_YearToDateReturnLabelYear-to-Date Return
Bar Chart, Year to Date Returnrr_BarChartYearToDateReturn8.55%
Bar Chart, Year to Date Return, Daterr_BarChartYearToDateReturnDateJun. 30, 2011
Retail | Return Before Taxes | Fidelity Low-Priced Stock Fund | Class: Fidelity Low-Priced Stock Fund
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Columnrr_AverageAnnualReturnColumnNameFidelity Low-Priced Stock Fund
Labelrr_AverageAnnualReturnLabelReturn Before Taxes
Past 1 yearrr_AverageAnnualReturnYear0120.70%
Past 5 yearsrr_AverageAnnualReturnYear055.41%
Past 10 yearsrr_AverageAnnualReturnYear1011.21%
Retail | Return After Taxes on Distributions | Fidelity Low-Priced Stock Fund | Class: Fidelity Low-Priced Stock Fund
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Columnrr_AverageAnnualReturnColumnNameFidelity Low-Priced Stock Fund
Labelrr_AverageAnnualReturnLabelReturn After Taxes on Distributions
Past 1 yearrr_AverageAnnualReturnYear0120.62%
Past 5 yearsrr_AverageAnnualReturnYear054.40%
Past 10 yearsrr_AverageAnnualReturnYear1010.20%
Retail | Return After Taxes on Distributions and Sale of Fund Shares | Fidelity Low-Priced Stock Fund | Class: Fidelity Low-Priced Stock Fund
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Columnrr_AverageAnnualReturnColumnNameFidelity Low-Priced Stock Fund
Labelrr_AverageAnnualReturnLabelReturn After Taxes on Distributions and Sale of Fund Shares
Past 1 yearrr_AverageAnnualReturnYear0113.55%
Past 5 yearsrr_AverageAnnualReturnYear054.51%
Past 10 yearsrr_AverageAnnualReturnYear109.73%
Retail | Russell 2000® Index (reflects no deduction for fees, expenses, or taxes) | Fidelity Low-Priced Stock Fund
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Labelrr_AverageAnnualReturnLabelRussell 2000® Index
Index No Deduction for Fees, Expenses, Taxes [Text]rr_IndexNoDeductionForFeesExpensesTaxes(reflects no deduction for fees, expenses, or taxes)
Past 1 yearrr_AverageAnnualReturnYear0126.85%
Past 5 yearsrr_AverageAnnualReturnYear054.47%
Past 10 yearsrr_AverageAnnualReturnYear106.33%
Retail | Fidelity Value Discovery Fund
 
Risk/Return:rr_RiskReturnAbstract 
Risk/Return [Heading]rr_RiskReturnHeading
Fund Summary
Fund/Class:
Fidelity® Value Discovery Fund/Fidelity Value Discovery Fund
Objective [Heading]rr_ObjectiveHeadingInvestment Objective
Objective, Primary [Text Block]rr_ObjectivePrimaryTextBlockThe fund seeks capital appreciation.
Fee Tablefpt81205_FundFeesAndExpensesAbstract 
Expense [Heading]rr_ExpenseHeadingFee Table
Expense Narrative [Text Block]rr_ExpenseNarrativeTextBlockThe following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund.
Shareholder feesrr_ShareholderFeesAbstract 
Shareholder Fees Caption [Text]rr_ShareholderFeesCaptionShareholder fees (fees paid directly from your investment)
Annual class operating expensesrr_OperatingExpensesAbstract 
Operating Expenses Caption [Text]rr_OperatingExpensesCaptionAnnual class operating expenses (expenses that you pay each year as a % of the value of your investment)
Expense Examplerr_ExpenseExampleAbstract 
Expense Example Narrative [Text Block]rr_ExpenseExampleNarrativeTextBlock

This example helps compare the cost of investing in the fund with the cost of investing in other mutual funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder 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:

Portfolio Turnoverfpt81205_PortfolioTurnoverAltAbstract 
Portfolio Turnover [Heading]rr_PortfolioTurnoverHeadingPortfolio Turnover
Portfolio Turnover [Text Block]rr_PortfolioTurnoverTextBlockThe 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 59% of the average value of its portfolio.
Portfolio Turnover, Raterr_PortfolioTurnoverRate59.00%
Strategy [Heading]rr_StrategyHeadingPrincipal Investment Strategies
Strategy Narrative [Text Block]rr_StrategyNarrativeTextBlock
  • Normally investing primarily in common stocks.
  • Investing in securities of companies that Fidelity Management & Research Company (FMR) believes are undervalued in the marketplace in relation to factors such as assets, sales, earnings, growth potential, or cash flow, or in relation to securities of other companies in the same industry (stocks of these companies are often called "value" stocks).
  • Investing in domestic and foreign issuers.
  • 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.
Risk [Heading]rr_RiskHeadingPrincipal Investment Risks
Risk Narrative [Text Block]rr_RiskNarrativeTextBlock
  • 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 can react differently to these developments.
  • 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.
  • 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.
  • "Value" Investing. "Value" stocks can perform differently from the market as a whole and other types of stocks and can continue to be undervalued by the market for long periods of time.

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. You could lose money by investing in the fund.

Risk Not Insured Depository Institution [Text]rr_RiskNotInsuredDepositoryInstitutionAn 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.
Risk Lose Money [Text]rr_RiskLoseMoneyYou could lose money by investing in the fund.
Performancefpt81205_FundPastPerformanceAbstract 
Bar Chart and Performance Table [Heading]rr_BarChartAndPerformanceTableHeadingPerformance
Performance Narrative [Text Block]rr_PerformanceNarrativeTextBlockThe 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 over various periods of time. The index description appears in the Additional Information about the Index section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit www.fidelity.com for updated return information.

Performance Information Illustrates Variability of Returns [Text]rr_PerformanceInformationIllustratesVariabilityOfReturnsThe 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 over various periods of time.
Performance Past Does Not Indicate Future [Text]rr_PerformancePastDoesNotIndicateFuturePast performance (before and after taxes) is not an indication of future performance.
Performance Availability Website Address [Text]rr_PerformanceAvailabilityWebSiteAddresswww.fidelity.com
Annual Total Returnsrr_BarChartTableAbstract 
Bar Chart [Heading]rr_BarChartHeading

Year-by-Year Returns

Calendar Years

Bar Chart Closing [Text Block]rr_BarChartClosingTextBlock
During the periods shown in the chart:
Returns
Quarter ended
Highest Quarter Return19.74%September 30, 2009
Lowest Quarter Return-25.18%December 31, 2008
Year-to-Date Return5.60%June 30, 2011
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Performance Table Headingrr_PerformanceTableHeadingAverage Annual Returns
Performance Table Narrativerr_PerformanceTableNarrativeTextBlock

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. 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.

For the periods ended
December 31, 2010
Performance Table Uses Highest Federal Raterr_PerformanceTableUsesHighestFederalRateAfter-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 Deferredrr_PerformanceTableNotRelevantToTaxDeferredThe after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement.
Performance Table Explanation after Tax Higherrr_PerformanceTableExplanationAfterTaxHigherReturn 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.
Retail | Fidelity Value Discovery Fund | Class: Fidelity Value Discovery Fund
 
Shareholder feesrr_ShareholderFeesAbstract 
Shareholder fees (fees paid directly from your investment)rr_ShareholderFeeOther none
Annual class operating expensesrr_OperatingExpensesAbstract 
Management fee (fluctuates based on the fund's performance relative to a securities market index)rr_ManagementFeesOverAssets0.50%
Distribution and/or Service (12b-1) feesrr_DistributionAndService12b1FeesOverAssets none
Other expensesrr_OtherExpensesOverAssets0.30%
Total annual operating expensesrr_ExpensesOverAssets0.80%
Expense Examplerr_ExpenseExampleAbstract 
1 yearrr_ExpenseExampleYear0182
3 yearsrr_ExpenseExampleYear03255
5 yearsrr_ExpenseExampleYear05444
10 yearsrr_ExpenseExampleYear10990
Annual Total Returnsrr_BarChartTableAbstract 
2003rr_AnnualReturn200329.56%
2004rr_AnnualReturn200414.57%
2005rr_AnnualReturn200518.70%
2006rr_AnnualReturn200615.60%
2007rr_AnnualReturn20079.71%
2008rr_AnnualReturn2008(42.32%)
2009rr_AnnualReturn200927.68%
2010rr_AnnualReturn201015.37%
Highest Quarterly Return, Labelrr_HighestQuarterlyReturnLabelHighest Quarter Return
Highest Quarterly Returnrr_BarChartHighestQuarterlyReturn19.74%
Highest Quarterly Return, Daterr_BarChartHighestQuarterlyReturnDateSep. 30, 2009
Lowest Quarterly Return, Labelrr_LowestQuarterlyReturnLabelLowest Quarter Return
Lowest Quarterly Returnrr_BarChartLowestQuarterlyReturn(25.18%)
Lowest Quarterly Return, Daterr_BarChartLowestQuarterlyReturnDateDec. 31, 2008
Year to Date Return, Labelrr_YearToDateReturnLabelYear-to-Date Return
Bar Chart, Year to Date Returnrr_BarChartYearToDateReturn5.60%
Bar Chart, Year to Date Return, Daterr_BarChartYearToDateReturnDateJun. 30, 2011
Retail | Return Before Taxes | Fidelity Value Discovery Fund | Class: Fidelity Value Discovery Fund
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Columnrr_AverageAnnualReturnColumnNameFidelity Value Discovery Fund
Labelrr_AverageAnnualReturnLabelReturn Before Taxes
Past 1 yearrr_AverageAnnualReturnYear0115.37%
Past 5 yearsrr_AverageAnnualReturnYear051.51%
Life of classrr_AverageAnnualReturnSinceInception8.12%[1]
Inception Daterr_AverageAnnualReturnInceptionDateDec. 10, 2002
Retail | Return After Taxes on Distributions | Fidelity Value Discovery Fund | Class: Fidelity Value Discovery Fund
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Columnrr_AverageAnnualReturnColumnNameFidelity Value Discovery Fund
Labelrr_AverageAnnualReturnLabelReturn After Taxes on Distributions
Past 1 yearrr_AverageAnnualReturnYear0115.13%
Past 5 yearsrr_AverageAnnualReturnYear050.98%
Life of classrr_AverageAnnualReturnSinceInception7.46%[1]
Inception Daterr_AverageAnnualReturnInceptionDateDec. 10, 2002
Retail | Return After Taxes on Distributions and Sale of Fund Shares | Fidelity Value Discovery Fund | Class: Fidelity Value Discovery Fund
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Columnrr_AverageAnnualReturnColumnNameFidelity Value Discovery Fund
Labelrr_AverageAnnualReturnLabelReturn After Taxes on Distributions and Sale of Fund Shares
Past 1 yearrr_AverageAnnualReturnYear0110.27%
Past 5 yearsrr_AverageAnnualReturnYear051.20%
Life of classrr_AverageAnnualReturnSinceInception6.93%[1]
Inception Daterr_AverageAnnualReturnInceptionDateDec. 10, 2002
Retail | Russell 3000® Value Index (reflects no deduction for fees, expenses, or taxes) | Fidelity Value Discovery Fund
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Labelrr_AverageAnnualReturnLabelRussell 3000® Value Index
Index No Deduction for Fees, Expenses, Taxes [Text]rr_IndexNoDeductionForFeesExpensesTaxes(reflects no deduction for fees, expenses, or taxes)
Past 1 yearrr_AverageAnnualReturnYear0116.23%
Past 5 yearsrr_AverageAnnualReturnYear051.45%
Life of classrr_AverageAnnualReturnSinceInception7.10%[1]
Inception Daterr_AverageAnnualReturnInceptionDateDec. 10, 2002
K | Fidelity Low-Priced Stock Fund
 
Risk/Return:rr_RiskReturnAbstract 
Risk/Return [Heading]rr_RiskReturnHeading
Fund Summary
Fund/Class:
Fidelity® Low-Priced Stock Fund/K
Objective [Heading]rr_ObjectiveHeadingInvestment Objective
Objective, Primary [Text Block]rr_ObjectivePrimaryTextBlockThe fund seeks capital appreciation.
Fee Tablefpt81205_FundFeesAndExpensesAbstract 
Expense [Heading]rr_ExpenseHeadingFee Table
Expense Narrative [Text Block]rr_ExpenseNarrativeTextBlockThe following table describes the fees and expenses that may be incurred when you buy, hold, or sell shares of the fund.
Shareholder feesrr_ShareholderFeesAbstract 
Shareholder Fees Caption [Text]rr_ShareholderFeesCaptionShareholder fees (fees paid directly from your investment)
Annual class operating expensesrr_OperatingExpensesAbstract 
Operating Expenses Caption [Text]rr_OperatingExpensesCaptionAnnual class operating expenses (expenses that you pay each year as a % of the value of your investment)
Expense Examplerr_ExpenseExampleAbstract 
Expense Example Narrative [Text Block]rr_ExpenseExampleNarrativeTextBlock

This example helps compare the cost of investing in the fund with the cost of investing in other mutual funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder 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:

Portfolio Turnoverfpt81205_PortfolioTurnoverAltAbstract 
Portfolio Turnover [Heading]rr_PortfolioTurnoverHeadingPortfolio Turnover
Portfolio Turnover [Text Block]rr_PortfolioTurnoverTextBlockThe 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 15% of the average value of its portfolio.
Portfolio Turnover, Raterr_PortfolioTurnoverRate15.00%
Strategy [Heading]rr_StrategyHeadingPrincipal Investment Strategies
Strategy Narrative [Text Block]rr_StrategyNarrativeTextBlock
  • Normally investing primarily in common stocks.
  • Normally investing at least 80% of assets in low-priced stocks (those priced at or below $35 per share), which can lead to investments in small and medium-sized companies.
  • Potentially investing in stocks not considered low-priced.
  • Investing in domestic and foreign issuers.
  • 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.
Risk [Heading]rr_RiskHeadingPrincipal Investment Risks
Risk Narrative [Text Block]rr_RiskNarrativeTextBlock
  • 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 can react differently to these developments.
  • 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.
  • 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. The value of securities of smaller issuers can be more volatile than that of larger issuers.

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. You could lose money by investing in the fund.

Risk Not Insured Depository Institution [Text]rr_RiskNotInsuredDepositoryInstitutionAn 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.
Risk Lose Money [Text]rr_RiskLoseMoneyYou could lose money by investing in the fund.
Performancefpt81205_FundPastPerformanceAbstract 
Bar Chart and Performance Table [Heading]rr_BarChartAndPerformanceTableHeadingPerformance
Performance Narrative [Text Block]rr_PerformanceNarrativeTextBlock

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 over various periods of time. The index description appears in the Additional Information about the Index section of the prospectus. Past performance is not an indication of future performance.

Visit www.401k.com and log in for updated return information.

Performance Information Illustrates Variability of Returns [Text]rr_PerformanceInformationIllustratesVariabilityOfReturnsThe 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 over various periods of time.
Performance Past Does Not Indicate Future [Text]rr_PerformancePastDoesNotIndicateFuturePast performance is not an indication of future performance.
Performance Availability Website Address [Text]rr_PerformanceAvailabilityWebSiteAddresswww.401k.com and log in for updated return information
Annual Total Returnsrr_BarChartTableAbstract 
Bar Chart [Heading]rr_BarChartHeading

Year-by-Year Returns

Calendar Years

Bar Chart Closing [Text Block]rr_BarChartClosingTextBlock
During the periods shown in the chart:
Returns
Quarter ended
Highest Quarter Return21.69%June 30, 2009
Lowest Quarter Return-9.96%June 30, 2010
Year-to-Date Return8.60%June 30, 2011
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Performance Table Headingrr_PerformanceTableHeadingAverage Annual Returns
For the periods ended
December 31, 2010
K | Fidelity Low-Priced Stock Fund | Fidelity Low-Priced Stock Fund - Class K
 
Shareholder feesrr_ShareholderFeesAbstract 
Redemption fee on shares held less than 90 days (as a % of amount redeemed)rr_RedemptionFeeOverRedemption1.50%
Annual class operating expensesrr_OperatingExpensesAbstract 
Management fee (fluctuates based on the fund's performance relative to a securities market index)rr_ManagementFeesOverAssets0.63%
Distribution and/or Service (12b-1) feesrr_DistributionAndService12b1FeesOverAssets none
Other expensesrr_OtherExpensesOverAssets0.08%
Total annual operating expensesrr_ExpensesOverAssets0.71%
Expense Examplerr_ExpenseExampleAbstract 
1 yearrr_ExpenseExampleYear0173
3 yearsrr_ExpenseExampleYear03227
5 yearsrr_ExpenseExampleYear05395
10 yearsrr_ExpenseExampleYear10883
Annual Total Returnsrr_BarChartTableAbstract 
2009rr_AnnualReturn200939.31%
2010rr_AnnualReturn201020.87%
Highest Quarterly Return, Labelrr_HighestQuarterlyReturnLabelHighest Quarter Return
Highest Quarterly Returnrr_BarChartHighestQuarterlyReturn21.69%
Highest Quarterly Return, Daterr_BarChartHighestQuarterlyReturnDateJun. 30, 2009
Lowest Quarterly Return, Labelrr_LowestQuarterlyReturnLabelLowest Quarter Return
Lowest Quarterly Returnrr_BarChartLowestQuarterlyReturn(9.96%)
Lowest Quarterly Return, Daterr_BarChartLowestQuarterlyReturnDateJun. 30, 2010
Year to Date Return, Labelrr_YearToDateReturnLabelYear-to-Date Return
Bar Chart, Year to Date Returnrr_BarChartYearToDateReturn8.60%
Bar Chart, Year to Date Return, Daterr_BarChartYearToDateReturnDateJun. 30, 2011
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Labelrr_AverageAnnualReturnLabelClass K
Past 1 yearrr_AverageAnnualReturnYear0120.87%
Life of classrr_AverageAnnualReturnSinceInception3.45%[2]
Inception Daterr_AverageAnnualReturnInceptionDateMay 09, 2008
K | Russell 2000® Index (reflects no deduction for fees, expenses, or taxes) | Fidelity Low-Priced Stock Fund
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Labelrr_AverageAnnualReturnLabelRussell 2000® Index
Index No Deduction for Fees, Expenses, Taxes [Text]rr_IndexNoDeductionForFeesExpensesTaxes(reflects no deduction for fees, expenses, or taxes)
Past 1 yearrr_AverageAnnualReturnYear0126.85%
Life of classrr_AverageAnnualReturnSinceInception4.78%[2]
Inception Daterr_AverageAnnualReturnInceptionDateMay 09, 2008
K | Fidelity Value Discovery Fund
 
Risk/Return:rr_RiskReturnAbstract 
Risk/Return [Heading]rr_RiskReturnHeading
Fund Summary
Fund/Class:
Fidelity® Value Discovery Fund/K
Objective [Heading]rr_ObjectiveHeadingInvestment Objective
Objective, Primary [Text Block]rr_ObjectivePrimaryTextBlockThe fund seeks capital appreciation.
Fee Tablefpt81205_FundFeesAndExpensesAbstract 
Expense [Heading]rr_ExpenseHeadingFee Table
Expense Narrative [Text Block]rr_ExpenseNarrativeTextBlockThe following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund.
Shareholder feesrr_ShareholderFeesAbstract 
Shareholder Fees Caption [Text]rr_ShareholderFeesCaptionShareholder fees (fees paid directly from your investment)
Annual class operating expensesrr_OperatingExpensesAbstract 
Operating Expenses Caption [Text]rr_OperatingExpensesCaptionAnnual class operating expenses (expenses that you pay each year as a % of the value of your investment)
Expense Examplerr_ExpenseExampleAbstract 
Expense Example Narrative [Text Block]rr_ExpenseExampleNarrativeTextBlock

This example helps compare the cost of investing in the fund with the cost of investing in other mutual funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder 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:

Portfolio Turnoverfpt81205_PortfolioTurnoverAltAbstract 
Portfolio Turnover [Heading]rr_PortfolioTurnoverHeadingPortfolio Turnover
Portfolio Turnover [Text Block]rr_PortfolioTurnoverTextBlockThe 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 59% of the average value of its portfolio.
Portfolio Turnover, Raterr_PortfolioTurnoverRate59.00%
Strategy [Heading]rr_StrategyHeadingPrincipal Investment Strategies
Strategy Narrative [Text Block]rr_StrategyNarrativeTextBlock
  • Normally investing primarily in common stocks.
  • Investing in securities of companies that Fidelity Management & Research Company (FMR) believes are undervalued in the marketplace in relation to factors such as assets, sales, earnings, growth potential, or cash flow, or in relation to securities of other companies in the same industry (stocks of these companies are often called "value" stocks).
  • Investing in domestic and foreign issuers.
  • 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.
Risk [Heading]rr_RiskHeadingPrincipal Investment Risks
Risk Narrative [Text Block]rr_RiskNarrativeTextBlock
  • 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 can react differently to these developments.
  • 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.
  • 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.
  • "Value" Investing. "Value" stocks can perform differently from the market as a whole and other types of stocks and can continue to be undervalued by the market for long periods of time.

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. You could lose money by investing in the fund.

Risk Not Insured Depository Institution [Text]rr_RiskNotInsuredDepositoryInstitutionAn 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.
Risk Lose Money [Text]rr_RiskLoseMoneyYou could lose money by investing in the fund.
Performancefpt81205_FundPastPerformanceAbstract 
Bar Chart and Performance Table [Heading]rr_BarChartAndPerformanceTableHeadingPerformance
Performance Narrative [Text Block]rr_PerformanceNarrativeTextBlock

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 over various periods of time. The index description appears in the Additional Information about the Index section of the prospectus. Past performance is not an indication of future performance.

Visit www.401k.com and log in for updated return information.

Performance Information Illustrates Variability of Returns [Text]rr_PerformanceInformationIllustratesVariabilityOfReturnsThe 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 over various periods of time.
Performance Past Does Not Indicate Future [Text]rr_PerformancePastDoesNotIndicateFuturePast performance is not an indication of future performance.
Performance Availability Website Address [Text]rr_PerformanceAvailabilityWebSiteAddresswww.401k.com and log in for updated return information
Annual Total Returnsrr_BarChartTableAbstract 
Bar Chart [Heading]rr_BarChartHeading

Year-by-Year Returns

Calendar Years

Bar Chart Closing [Text Block]rr_BarChartClosingTextBlock
During the periods shown in the chart:
Returns
Quarter ended
Highest Quarter Return19.77%September 30, 2009
Lowest Quarter Return-13.27%March 31, 2009
Year-to-Date Return5.60%June 30, 2011
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Performance Table Headingrr_PerformanceTableHeadingAverage Annual Returns
For the periods ended
December 31, 2010
K | Fidelity Value Discovery Fund | Fidelity Value Discovery Fund - Class K
 
Shareholder feesrr_ShareholderFeesAbstract 
Shareholder fees (fees paid directly from your investment)rr_ShareholderFeeOther none
Annual class operating expensesrr_OperatingExpensesAbstract 
Management fee (fluctuates based on the fund's performance relative to a securities market index)rr_ManagementFeesOverAssets0.50%
Distribution and/or Service (12b-1) feesrr_DistributionAndService12b1FeesOverAssets none
Other expensesrr_OtherExpensesOverAssets0.11%
Total annual operating expensesrr_ExpensesOverAssets0.61%
Expense Examplerr_ExpenseExampleAbstract 
1 yearrr_ExpenseExampleYear0162
3 yearsrr_ExpenseExampleYear03195
5 yearsrr_ExpenseExampleYear05340
10 yearsrr_ExpenseExampleYear10 762
Annual Total Returnsrr_BarChartTableAbstract 
2009rr_AnnualReturn200928.00%
2010rr_AnnualReturn201015.71%
Highest Quarterly Return, Labelrr_HighestQuarterlyReturnLabelHighest Quarter Return
Highest Quarterly Returnrr_BarChartHighestQuarterlyReturn19.77%
Highest Quarterly Return, Daterr_BarChartHighestQuarterlyReturnDateSep. 30, 2009
Lowest Quarterly Return, Labelrr_LowestQuarterlyReturnLabelLowest Quarter Return
Lowest Quarterly Returnrr_BarChartLowestQuarterlyReturn(13.27%)
Lowest Quarterly Return, Daterr_BarChartLowestQuarterlyReturnDateMar. 31, 2009
Year to Date Return, Labelrr_YearToDateReturnLabelYear-to-Date Return
Bar Chart, Year to Date Returnrr_BarChartYearToDateReturn5.60%
Bar Chart, Year to Date Return, Daterr_BarChartYearToDateReturnDateJun. 30, 2011
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Labelrr_AverageAnnualReturnLabelClass K
Past 1 yearrr_AverageAnnualReturnYear0115.71%
Life of classrr_AverageAnnualReturnSinceInception(3.53%)[2]
Inception Daterr_AverageAnnualReturnInceptionDateMay 09, 2008
K | Russell 3000® Value Index (reflects no deduction for fees, expenses, or taxes) | Fidelity Value Discovery Fund
 
Average Annual Total Returnsrr_AverageAnnualReturnAbstract 
Labelrr_AverageAnnualReturnLabelRussell 3000® Value Index
Index No Deduction for Fees, Expenses, Taxes [Text]rr_IndexNoDeductionForFeesExpensesTaxes(reflects no deduction for fees, expenses, or taxes)
Past 1 yearrr_AverageAnnualReturnYear0116.23%
Life of classrr_AverageAnnualReturnSinceInception(2.81%)[2]
Inception Daterr_AverageAnnualReturnInceptionDateMay 09, 2008
[1] From December 10, 2002.
[2]From May 9, 2008.