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(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo California Limited-Term Tax-Free Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Investment Objective </b></p>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund seeks current income exempt from federal income tax and California individual income tax, consistent with capital preservation.
Expense [Heading] rr_ExpenseHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Fees and Expenses </b></p>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

These tables are intended to help you understand the various costs and expenses you will pay if you buy and hold shares of the Fund. 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 aggregate in specified classes of certain Wells Fargo Funds. More information about these and other discounts is available from your financial professional and in "Share Class Features" and "Reductions and Waivers of Sales Charges" on pages 84 and 86 of the Prospectus and "Additional Purchase and Redemption Information" on page 69 of the Statement of Additional Information. Investors who purchase through certain intermediaries may be subject to different sales charge discounts than those outlined shares in these sections. Please see Appendix A on page 110 for further information.
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts 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 aggregate in specified classes of certain Wells Fargo Funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Shareholder Fees (fees paid directly from your investment) </b></p>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) </b></p>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination October 31, 2019
Expenses Deferred Charges [Text Block] rr_ExpensesDeferredChargesTextBlock Investments of $250,000 or more are not subject to a front-end sales charge but generally will be subject to a deferred sales charge of 0.40% if redeemed within 12 months from the date of purchase.
Expense Example [Heading] rr_ExpenseExampleHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Example of Expenses </b></p>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The example below is intended to help you compare the costs of investing in the Fund with the costs of investing in other mutual funds. The example assumes a $10,000 initial investment, 5% annual total return, and that fees and expenses remain the same as in the tables above. To the extent that the Manager is waiving fees or reimbursing expenses, the example assumes that such waiver or reimbursement will only be in place through the date noted above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming Redemption at End of Period </b></p>
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming No Redemption </b></p>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Portfolio Turnover </b></p>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

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 fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 45% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 45.00%
Strategy [Heading] rr_StrategyHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Strategies </b></p>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

Under normal circumstances, we invest:

  • at least 80% of the Fund's net assets in municipal securities whose interest is exempt from federal income tax, including federal alternative minimum tax (AMT), and California individual income tax;

  • up to 20% of the Fund's net assets in securities whose interest is subject to federal income tax, including federal AMT;

  • up to 10% of the Fund's total assets in below investment-grade municipal securities; and

  • up to 10% of the Fund's total assets in inverse floaters.

We invest principally in municipal securities whose interest is exempt from federal income tax, including federal AMT, and California individual income tax. Our investment holdings may include municipal securities issued by the state of California and its subdivisions, authorities, instrumentalities and corporations, as well as municipal securities issued by the territories and possessions of the United States. Some of the securities may be below investment grade or may be unrated and deemed by us to be of comparable quality. We may also invest a portion of the Fund's net assets in securities whose interest is subject to federal income tax, including federal AMT. We may use futures for duration and yield curve management. While we may purchase securities of any maturity, under normal circumstances, we expect the Fund's dollar-weighted average effective maturity to be between 2 and 7 years.

We may invest up to 10% of the Fund's total assets in inverse floaters to seek enhanced returns. Inverse floaters are derivative debt instruments created by depositing a municipal security in a trust. Inverse floaters pay interest at rates that generally vary inversely with specified short-term interest rates and involve leverage. We intend to limit leverage created by the Fund's investment in inverse floaters to an amount equal to 10% of the Fund's total assets.

We use a combination of top-down and bottom-up research to cover the four main elements of total return: duration management, yield curve positioning, sector and credit quality allocation, and security selection. Our top-down analysis involves an evaluation of macroeconomic factors that may include, among others, the pace of economic growth, employment conditions, inflation, and monetary and fiscal policy. Our bottom-up analysis, which involves intensive research into the credit fundamentals of individual issuers and the relative value of individual issues, is used to uncover solid investment opportunities. Securities are selected based on several factors, including, among others, improving financial trends, positive industry and sector dynamics, improving economic conditions, and specific demographic trends. Securities may be sold based on relative value considerations and could be replaced with a security that presents a better value or risk/reward profile. A security may also be sold due to changes in credit characteristics or outlook, as well as changes in portfolio strategy or cash flow needs.
Risk [Heading] rr_RiskHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Risks </b></p>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency, and is primarily subject to the risks briefly summarized below.

Credit Risk. The issuer or guarantor of a debt security may be unable or perceived to be unable to pay interest or repay principal when they become due, which could cause the value of an investment to decline and a Fund to lose money.

Derivatives Risk. The use of derivatives, such as futures, options and swap agreements, can lead to losses, including those magnified by leverage, particularly when derivatives are used to enhance return rather than mitigate risk. Certain derivative instruments may be difficult to sell when the portfolio manager believes it would be appropriate to do so, or the other party to a derivative contract may be unwilling or unable to fulfill its contractual obligations.

Futures Contracts Risk. A Fund that uses futures contracts, which are a type of derivative, is subject to the risk of loss caused by unanticipated market movements. In addition, there may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes and there may at times not be a liquid secondary market for certain futures contracts.

High Yield Securities Risk. High yield securities and unrated securities of similar credit quality (commonly known as "junk bonds") have a much greater risk of default or of not returning principal and their values tend to be more volatile than higher-rated securities with similar maturities.

Interest Rate Risk. When interest rates rise, the value of debt securities tends to fall. When interest rates decline, interest that a Fund is able to earn on its investments in debt securities may also decline, but the value of those securities may increase.

Inverse Floater Risk. The holder of an inverse floater, which is a type of derivative, could lose more than its principal investment. An inverse floater produces less income and may decline in value when market rates and the rate payable on the floater rises. An inverse floater typically involves leverage, which may magnify a Fund's losses, and exhibits greater price and income volatility than an unleveraged bond with a similar maturity.

Management Risk. Investment decisions, techniques, analyses or models implemented by a Fund's manager or sub-adviser in seeking to achieve the Fund's investment objective may not produce the returns expected, may cause the Fund's shares to lose value or may cause the Fund to underperform other funds with similar investment objectives.

Market Risk. The values of, and/or the income generated by, securities held by a Fund may decline due to general market conditions or other factors, including those directly involving the issuers of such securities. Security markets are volatile and may decline significantly in response to adverse issuer, regulatory, political, or economic developments. Different sectors of the market and different security types may react differently to such developments.

Municipal Securities Risk. Municipal securities may be fully or partially backed or enhanced by the taxing authority of a local government, by the current or anticipated revenues from a specific project or specific assets, or by the credit of, or liquidity enhancement provided by, a private issuer. Various types of municipal securities are often related in such a way that political, economic or business developments affecting one obligation could affect other municipal securities held by a Fund.

State Emphasis Risk. Securities issued by a particular state and its subdivisions, authorities, instrumentalities and corporations are subject to the risk of unfavorable developments occurring in such state. Such developments may adversely impact the liquidity and value of the municipal securities in which a Fund invests and, in turn, adversely impact the value of the Fund's shares.
Risk Lose Money [Text] rr_RiskLoseMoney An investment in the Fund may lose money
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Performance </b></p>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year. The Fund's average annual total returns are compared to the performance of one or more indices. Past performance before and after taxes is no guarantee of future results. Current month-end performance is available on the Fund's website at wellsfargofunds.com.
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Returns do not reflect sales charges and would be lower if they did
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Highest Quarter: 1st Quarter 2009

+3.17%

Lowest Quarter: 4th Quarter 2016

-2.42%

Year-to-date total return as of 9/30/2018 is -0.34%
Performance Table Heading rr_PerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Average Annual Total Returns for the periods ended 12/31/2017 (returns reflect applicable sales charges) </b></p>
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts. After-tax returns are shown for only one class of shares. After-tax returns for any other class will vary.
Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads returns reflect applicable sales charges
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance before and after taxes is no guarantee of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown for only one class of shares.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress wellsfargofunds.com
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo California Limited-Term Tax-Free Fund) | Bloomberg Barclays Municipal 1-5 Year Blend Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 1.90%
5 Years rr_AverageAnnualReturnYear05 1.23%
10 Years rr_AverageAnnualReturnYear10 2.56%
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo California Limited-Term Tax-Free Fund) | Bloomberg Barclays California Municipal 1-5 Year Blend Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 1.66%
5 Years rr_AverageAnnualReturnYear05 1.24%
10 Years rr_AverageAnnualReturnYear10 2.58%
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo California Limited-Term Tax-Free Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 2.00%
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [1]
Management Fees rr_ManagementFeesOverAssets 0.39%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.45%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.84%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets (0.04%)
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 0.80% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 280
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 459
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 653
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,213
Bar Chart [Heading] rr_BarChartHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b>Calendar Year Total Returns for Class A as of 12/31 each year (Returns do not reflect sales charges and would be lower if they did)</b> </p>
Annual Return 2008 rr_AnnualReturn2008 (0.19%)
Annual Return 2009 rr_AnnualReturn2009 8.38%
Annual Return 2010 rr_AnnualReturn2010 2.24%
Annual Return 2011 rr_AnnualReturn2011 4.49%
Annual Return 2012 rr_AnnualReturn2012 3.44%
Annual Return 2013 rr_AnnualReturn2013 1.22%
Annual Return 2014 rr_AnnualReturn2014 3.50%
Annual Return 2015 rr_AnnualReturn2015 1.65%
Annual Return 2016 rr_AnnualReturn2016 (0.46%)
Annual Return 2017 rr_AnnualReturn2017 2.08%
Year to Date Return, Label rr_YearToDateReturnLabel Year-to-date total return as of 9/30/2018 is -0.34%
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (0.34%)
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2018
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter: 1st Quarter 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 3.17%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2009
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter: 4th Quarter 2016
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (2.42%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2016
1 Year rr_AverageAnnualReturnYear01 0.02%
5 Years rr_AverageAnnualReturnYear05 1.18%
10 Years rr_AverageAnnualReturnYear10 2.40%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Nov. 18, 1992
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo California Limited-Term Tax-Free Fund) | Class A | (after taxes on distributions)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 0.02%
5 Years rr_AverageAnnualReturnYear05 1.18%
10 Years rr_AverageAnnualReturnYear10 2.40%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Nov. 18, 1992
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo California Limited-Term Tax-Free Fund) | Class A | (after taxes on distributions and the sale of Fund Shares)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 0.74%
5 Years rr_AverageAnnualReturnYear05 1.29%
10 Years rr_AverageAnnualReturnYear10 2.38%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Nov. 18, 1992
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo California Limited-Term Tax-Free Fund) | Class C  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management Fees rr_ManagementFeesOverAssets 0.39%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.75%
Other Expenses rr_OtherExpensesOverAssets 0.45%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.59%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets (0.04%)
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 1.55% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 258
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 498
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 862
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,886
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 158
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 498
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 862
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,886
1 Year rr_AverageAnnualReturnYear01 0.41%
5 Years rr_AverageAnnualReturnYear05 0.85%
10 Years rr_AverageAnnualReturnYear10 1.84%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Aug. 30, 2002
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo California Tax-Free Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Investment Objective </b></p>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund seeks current income exempt from federal income tax and California individual income tax.
Expense [Heading] rr_ExpenseHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Fees and Expenses </b></p>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

These tables are intended to help you understand the various costs and expenses you will pay if you buy and hold shares of the Fund. 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 aggregate in specified classes of certain Wells Fargo Funds. More information about these and other discounts is available from your financial professional and in "Share Class Features" and "Reductions and Waivers of Sales Charges" on pages 84 and 86 of the Prospectus and "Additional Purchase and Redemption Information" on page 69 of the Statement of Additional Information. Investors who purchase through certain intermediaries may be subject to different sales charge discounts than those outlined shares in these sections. Please see Appendix A on page 110 for further information.
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts 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 aggregate in specified classes of certain Wells Fargo Funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Shareholder Fees (fees paid directly from your investment) </b></p>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) </b></p>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination October 31, 2019
Expenses Deferred Charges [Text Block] rr_ExpensesDeferredChargesTextBlock Investments of $1 million or more are not subject to a front-end sales charge but generally will be subject to a deferred sales charge of 1.00% if redeemed within 18 months from the date of purchase.
Expense Example [Heading] rr_ExpenseExampleHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Example of Expenses </b></p>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The example below is intended to help you compare the costs of investing in the Fund with the costs of investing in other mutual funds. The example assumes a $10,000 initial investment, 5% annual total return, and that fees and expenses remain the same as in the tables above. To the extent that the Manager is waiving fees or reimbursing expenses, the example assumes that such waiver or reimbursement will only be in place through the date noted above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming Redemption at End of Period </b></p>
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming No Redemption </b></p>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Portfolio Turnover </b></p>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

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 fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 33% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 33.00%
Strategy [Heading] rr_StrategyHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Strategies </b></p>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

Under normal circumstances, we invest:

  • at least 80% of the Fund's net assets in municipal securities whose interest is exempt from federal income tax, including federal alternative minimum tax (AMT), and California individual income tax;

  • up to 20% of the Fund's net assets in securities whose interest is subject to federal income tax, including federal AMT;

  • up to 10% of the Fund's total assets in below investment-grade municipal securities; and

  • up to 10% of the Fund's total assets in inverse floaters.

We invest principally in municipal securities whose interest is exempt from federal income tax, including federal AMT, and California individual income tax. Our investment holdings may include municipal securities issued by the state of California and its subdivisions, authorities, instrumentalities and corporations, as well as municipal securities issued by the territories and possessions of the United States. Some of the securities may be below investment grade or may be unrated and deemed by us to be of comparable quality. We may also invest a portion of the Fund's net assets in securities whose interest is subject to federal income tax, including federal AMT. We may use futures for duration and yield curve management. While we may purchase securities of any maturity, under normal circumstances, we expect the Fund's dollar-weighted average effective maturity to be between 3 and 20 years.

We may invest up to 10% of the Fund's total assets in inverse floaters to seek enhanced returns. Inverse floaters are derivative debt instruments created by depositing a municipal security in a trust. Inverse floaters pay interest at rates that generally vary inversely with specified short-term interest rates and involve leverage. We intend to limit leverage created by the Fund's investment in inverse floaters to an amount equal to 10% of the Fund's total assets.

We use a combination of top-down and bottom-up research to cover the four main elements of total return: duration management, yield curve positioning, sector and credit quality allocation, and security selection. Our top-down analysis involves an evaluation of macroeconomic factors that may include, among others, the pace of economic growth, employment conditions, inflation, and monetary and fiscal policy. Our bottom-up analysis, which involves intensive research into the credit fundamentals of individual issuers and the relative value of individual issues, is used to uncover solid investment opportunities. Securities are selected based on several factors, including, among others, improving financial trends, positive industry and sector dynamics, improving economic conditions, and specific demographic trends. Securities may be sold based on relative value considerations and could be replaced with a security that presents a better value or risk/reward profile. A security may also be sold due to changes in credit characteristics or outlook, as well as changes in portfolio strategy or cash flow needs.

The Fund is considered to be non-diversified.
Risk [Heading] rr_RiskHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Risks </b></p>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency, and is primarily subject to the risks briefly summarized below.

Credit Risk. The issuer or guarantor of a debt security may be unable or perceived to be unable to pay interest or repay principal when they become due, which could cause the value of an investment to decline and a Fund to lose money.

Derivatives Risk. The use of derivatives, such as futures, options and swap agreements, can lead to losses, including those magnified by leverage, particularly when derivatives are used to enhance return rather than mitigate risk. Certain derivative instruments may be difficult to sell when the portfolio manager believes it would be appropriate to do so, or the other party to a derivative contract may be unwilling or unable to fulfill its contractual obligations.

Futures Contracts Risk. A Fund that uses futures contracts, which are a type of derivative, is subject to the risk of loss caused by unanticipated market movements. In addition, there may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes and there may at times not be a liquid secondary market for certain futures contracts.

High Yield Securities Risk. High yield securities and unrated securities of similar credit quality (commonly known as "junk bonds") have a much greater risk of default or of not returning principal and their values tend to be more volatile than higher-rated securities with similar maturities.

Interest Rate Risk. When interest rates rise, the value of debt securities tends to fall. When interest rates decline, interest that a Fund is able to earn on its investments in debt securities may also decline, but the value of those securities may increase.

Inverse Floater Risk. The holder of an inverse floater, which is a type of derivative, could lose more than its principal investment. An inverse floater produces less income and may decline in value when market rates and the rate payable on the floater rises. An inverse floater typically involves leverage, which may magnify a Fund's losses, and exhibits greater price and income volatility than an unleveraged bond with a similar maturity.

Management Risk. Investment decisions, techniques, analyses or models implemented by a Fund's manager or sub-adviser in seeking to achieve the Fund's investment objective may not produce the returns expected, may cause the Fund's shares to lose value or may cause the Fund to underperform other funds with similar investment objectives.

Market Risk. The values of, and/or the income generated by, securities held by a Fund may decline due to general market conditions or other factors, including those directly involving the issuers of such securities. Security markets are volatile and may decline significantly in response to adverse issuer, regulatory, political, or economic developments. Different sectors of the market and different security types may react differently to such developments.

Municipal Securities Risk. Municipal securities may be fully or partially backed or enhanced by the taxing authority of a local government, by the current or anticipated revenues from a specific project or specific assets, or by the credit of, or liquidity enhancement provided by, a private issuer. Various types of municipal securities are often related in such a way that political, economic or business developments affecting one obligation could affect other municipal securities held by a Fund.

Non-Diversification Risk. A Fund that is considered "non-diversified" under the 1940 Act is more vulnerable to market or economic events impacting issuers of individual portfolio securities than a "diversified" fund. Default by the issuer of an individual security in such a Fund's portfolio may have a greater negative effect on the Fund's return or net asset value than it would on the return or net asset value of a "diversified" fund.

State Emphasis Risk. Securities issued by a particular state and its subdivisions, authorities, instrumentalities and corporations are subject to the risk of unfavorable developments occurring in such state. Such developments may adversely impact the liquidity and value of the municipal securities in which a Fund invests and, in turn, adversely impact the value of the Fund's shares.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversification Risk. A Fund that is considered "non-diversified" under the 1940 Act is more vulnerable to market or economic events impacting issuers of individual portfolio securities than a "diversified" fund. Default by the issuer of an individual security in such a Fund's portfolio may have a greater negative effect on the Fund's return or net asset value than it would on the return or net asset value of a "diversified" fund.
Risk Lose Money [Text] rr_RiskLoseMoney An investment in the Fund may lose money
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Performance </b></p>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year. The Fund's average annual total returns are compared to the performance of one or more indices. Past performance before and after taxes is no guarantee of future results. Current month-end performance is available on the Fund's website at wellsfargofunds.com.
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Returns do not reflect sales charges and would be lower if they did
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Highest Quarter: 3rd Quarter 2009

+8.26%

Lowest Quarter: 4th Quarter 2010

-4.71%

Year-to-date total return as of 9/30/2018 is -0.63%
Performance Table Heading rr_PerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Average Annual Total Returns for the periods ended 12/31/2017 (returns reflect applicable sales charges) </b></p>
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts. After-tax returns are shown for only one class of shares. After-tax returns for any other class will vary.
Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads returns reflect applicable sales charges
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance before and after taxes is no guarantee of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown for only one class of shares.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress wellsfargofunds.com
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo California Tax-Free Fund) | Bloomberg Barclays Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 5.45%
5 Years rr_AverageAnnualReturnYear05 3.02%
10 Years rr_AverageAnnualReturnYear10 4.46%
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo California Tax-Free Fund) | Bloomberg Barclays California Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 5.63%
5 Years rr_AverageAnnualReturnYear05 3.36%
10 Years rr_AverageAnnualReturnYear10 4.72%
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo California Tax-Free Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 4.50%
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [3]
Management Fees rr_ManagementFeesOverAssets 0.39%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.44%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.83%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets (0.08%)
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 0.75% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 523
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 695
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 882
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,422
Bar Chart [Heading] rr_BarChartHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b>Calendar Year Total Returns for Class A as of 12/31 each year (Returns do not reflect sales charges and would be lower if they did)</b> </p>
Annual Return 2008 rr_AnnualReturn2008 (8.10%)
Annual Return 2009 rr_AnnualReturn2009 15.43%
Annual Return 2010 rr_AnnualReturn2010 2.03%
Annual Return 2011 rr_AnnualReturn2011 11.17%
Annual Return 2012 rr_AnnualReturn2012 9.80%
Annual Return 2013 rr_AnnualReturn2013 (1.27%)
Annual Return 2014 rr_AnnualReturn2014 11.78%
Annual Return 2015 rr_AnnualReturn2015 3.26%
Annual Return 2016 rr_AnnualReturn2016 (0.21%)
Annual Return 2017 rr_AnnualReturn2017 5.04%
Year to Date Return, Label rr_YearToDateReturnLabel Year-to-date total return as of 9/30/2018 is -0.63%
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (0.63%)
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2018
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter: 3rd Quarter 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 8.26%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2009
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter: 4th Quarter 2010
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (4.71%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2010
1 Year rr_AverageAnnualReturnYear01 0.31%
5 Years rr_AverageAnnualReturnYear05 2.67%
10 Years rr_AverageAnnualReturnYear10 4.18%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Oct. 06, 1988
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo California Tax-Free Fund) | Class A | (after taxes on distributions)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 0.31%
5 Years rr_AverageAnnualReturnYear05 2.66%
10 Years rr_AverageAnnualReturnYear10 4.17%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Oct. 06, 1988
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo California Tax-Free Fund) | Class A | (after taxes on distributions and the sale of Fund Shares)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 1.47%
5 Years rr_AverageAnnualReturnYear05 2.77%
10 Years rr_AverageAnnualReturnYear10 4.07%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Oct. 06, 1988
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo California Tax-Free Fund) | Class C  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management Fees rr_ManagementFeesOverAssets 0.39%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.75%
Other Expenses rr_OtherExpensesOverAssets 0.44%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.58%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets (0.08%)
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 1.50% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 253
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 491
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 853
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,872
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 153
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 491
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 853
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,872
1 Year rr_AverageAnnualReturnYear01 3.31%
5 Years rr_AverageAnnualReturnYear05 2.86%
10 Years rr_AverageAnnualReturnYear10 3.90%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Jul. 01, 1993
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Colorado Tax-Free Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Investment Objective </b></p>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund seeks current income exempt from federal income tax and Colorado individual income tax.
Expense [Heading] rr_ExpenseHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Fees and Expenses </b></p>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

These tables are intended to help you understand the various costs and expenses you will pay if you buy and hold shares of the Fund. 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 aggregate in specified classes of certain Wells Fargo Funds. More information about these and other discounts is available from your financial professional and in "Share Class Features" and "Reductions and Waivers of Sales Charges" on pages 84 and 86 of the Prospectus and "Additional Purchase and Redemption Information" on page 69 of the Statement of Additional Information. Investors who purchase through certain intermediaries may be subject to different sales charge discounts than those outlined shares in these sections. Please see Appendix A on page 110 for further information.
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts 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 aggregate in specified classes of certain Wells Fargo Funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Shareholder Fees (fees paid directly from your investment) </b></p>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) </b></p>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination October 31, 2019
Expenses Deferred Charges [Text Block] rr_ExpensesDeferredChargesTextBlock Investments of $1 million or more are not subject to a front-end sales charge but generally will be subject to a deferred sales charge of 1.00% if redeemed within 18 months from the date of purchase.
Expense Example [Heading] rr_ExpenseExampleHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Example of Expenses </b></p>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The example below is intended to help you compare the costs of investing in the Fund with the costs of investing in other mutual funds. The example assumes a $10,000 initial investment, 5% annual total return, and that fees and expenses remain the same as in the tables above. To the extent that the Manager is waiving fees or reimbursing expenses, the example assumes that such waiver or reimbursement will only be in place through the date noted above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming Redemption at End of Period </b></p>
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming No Redemption </b></p>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Portfolio Turnover </b></p>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

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 fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 10% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 10.00%
Strategy [Heading] rr_StrategyHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Strategies </b></p>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

Under normal circumstances, we invest:

  • at least 80% of the Fund's net assets in municipal securities whose interest is exempt from federal income tax, including federal alternative minimum tax (AMT), and Colorado individual income tax;

  • up to 20% of the Fund's net assets in securities whose interest is subject to federal income tax, including federal AMT;

  • up to 10% of the Fund's total assets in below investment-grade municipal securities; and

  • up to 10% of the Fund's total assets in inverse floaters.

We invest principally in municipal securities whose interest is exempt from federal income tax, including federal AMT, and Colorado individual income tax. Our investment holdings may include municipal securities issued by the state of Colorado and its subdivisions, authorities, instrumentalities and corporations, as well as municipal securities issued by the territories and possessions of the United States. Some of the securities may be below investment grade or may be unrated and deemed by us to be of comparable quality. We may also invest a portion of the Fund's net assets in securities whose interest is subject to federal income tax, including federal AMT. We may use futures for duration and yield curve management. While we may purchase securities of any maturity, under normal circumstances, we expect the Fund's dollar-weighted average effective maturity to be between 3 and 20 years.

We may invest up to 10% of the Fund's total assets in inverse floaters to seek enhanced returns. Inverse floaters are derivative debt instruments created by depositing a municipal security in a trust. Inverse floaters pay interest at rates that generally vary inversely with specified short-term interest rates and involve leverage. We intend to limit leverage created by the Fund's investment in inverse floaters to an amount equal to 10% of the Fund's total assets.

We use a combination of top-down and bottom-up research to cover the four main elements of total return: duration management, yield curve positioning, sector and credit quality allocation, and security selection. Our top-down analysis involves an evaluation of macroeconomic factors that may include, among others, the pace of economic growth, employment conditions, inflation, and monetary and fiscal policy. Our bottom-up analysis, which involves intensive research into the credit fundamentals of individual issuers and the relative value of individual issues, is used to uncover solid investment opportunities. Securities are selected based on several factors, including, among others, improving financial trends, positive industry and sector dynamics, improving economic conditions, and specific demographic trends. Securities may be sold based on relative value considerations and could be replaced with a security that presents a better value or risk/reward profile. A security may also be sold due to changes in credit characteristics or outlook, as well as changes in portfolio strategy or cash flow needs.
Risk [Heading] rr_RiskHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Risks </b></p>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency, and is primarily subject to the risks briefly summarized below.

Credit Risk. The issuer or guarantor of a debt security may be unable or perceived to be unable to pay interest or repay principal when they become due, which could cause the value of an investment to decline and a Fund to lose money.

Derivatives Risk. The use of derivatives, such as futures, options and swap agreements, can lead to losses, including those magnified by leverage, particularly when derivatives are used to enhance return rather than mitigate risk. Certain derivative instruments may be difficult to sell when the portfolio manager believes it would be appropriate to do so, or the other party to a derivative contract may be unwilling or unable to fulfill its contractual obligations.

Futures Contracts Risk. A Fund that uses futures contracts, which are a type of derivative, is subject to the risk of loss caused by unanticipated market movements. In addition, there may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes and there may at times not be a liquid secondary market for certain futures contracts.

High Yield Securities Risk. High yield securities and unrated securities of similar credit quality (commonly known as "junk bonds") have a much greater risk of default or of not returning principal and their values tend to be more volatile than higher-rated securities with similar maturities.

Interest Rate Risk. When interest rates rise, the value of debt securities tends to fall. When interest rates decline, interest that a Fund is able to earn on its investments in debt securities may also decline, but the value of those securities may increase.

Inverse Floater Risk. The holder of an inverse floater, which is a type of derivative, could lose more than its principal investment. An inverse floater produces less income and may decline in value when market rates and the rate payable on the floater rises. An inverse floater typically involves leverage, which may magnify a Fund's losses, and exhibits greater price and income volatility than an unleveraged bond with a similar maturity.

Management Risk. Investment decisions, techniques, analyses or models implemented by a Fund's manager or sub-adviser in seeking to achieve the Fund's investment objective may not produce the returns expected, may cause the Fund's shares to lose value or may cause the Fund to underperform other funds with similar investment objectives.

Market Risk. The values of, and/or the income generated by, securities held by a Fund may decline due to general market conditions or other factors, including those directly involving the issuers of such securities. Security markets are volatile and may decline significantly in response to adverse issuer, regulatory, political, or economic developments. Different sectors of the market and different security types may react differently to such developments.

Municipal Securities Risk. Municipal securities may be fully or partially backed or enhanced by the taxing authority of a local government, by the current or anticipated revenues from a specific project or specific assets, or by the credit of, or liquidity enhancement provided by, a private issuer. Various types of municipal securities are often related in such a way that political, economic or business developments affecting one obligation could affect other municipal securities held by a Fund.

State Emphasis Risk. Securities issued by a particular state and its subdivisions, authorities, instrumentalities and corporations are subject to the risk of unfavorable developments occurring in such state. Such developments may adversely impact the liquidity and value of the municipal securities in which a Fund invests and, in turn, adversely impact the value of the Fund's shares.
Risk Lose Money [Text] rr_RiskLoseMoney An investment in the Fund may lose money
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Performance </b></p>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year. The Fund's average annual total returns are compared to the performance of one or more indices. Past performance before and after taxes is no guarantee of future results. Current month-end performance is available on the Fund's website at wellsfargofunds.com.
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Returns do not reflect sales charges and would be lower if they did
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Highest Quarter: 3rd Quarter 2009

+6.78%

Lowest Quarter: 4th Quarter 2010

-4.32%

Year-to-date total return as of 9/30/2018 is -0.19%
Performance Table Heading rr_PerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Average Annual Total Returns for the periods ended 12/31/2017 (returns reflect applicable sales charges) </b></p> [4]
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts. After-tax returns are shown for only one class of shares. After-tax returns for any other class will vary.
Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads returns reflect applicable sales charges
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance before and after taxes is no guarantee of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown for only one class of shares.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress wellsfargofunds.com
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Colorado Tax-Free Fund) | Bloomberg Barclays Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 5.45%
5 Years rr_AverageAnnualReturnYear05 3.02%
10 Years rr_AverageAnnualReturnYear10 4.46%
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Colorado Tax-Free Fund) | Bloomberg Barclays Colorado Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 6.21%
5 Years rr_AverageAnnualReturnYear05 3.66%
10 Years rr_AverageAnnualReturnYear10 5.00%
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Colorado Tax-Free Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 4.50%
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [3]
Management Fees rr_ManagementFeesOverAssets 0.40%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.45%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.85%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets none
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 0.85% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 533
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 709
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 900
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,452
Bar Chart [Heading] rr_BarChartHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b>Calendar Year Total Returns for Class A as of 12/31 each year (Returns do not reflect sales charges and would be lower if they did)</b> </p>
Annual Return 2008 rr_AnnualReturn2008 (6.08%)
Annual Return 2009 rr_AnnualReturn2009 13.22%
Annual Return 2010 rr_AnnualReturn2010 1.02%
Annual Return 2011 rr_AnnualReturn2011 9.13%
Annual Return 2012 rr_AnnualReturn2012 8.13%
Annual Return 2013 rr_AnnualReturn2013 (2.53%)
Annual Return 2014 rr_AnnualReturn2014 10.87%
Annual Return 2015 rr_AnnualReturn2015 3.33%
Annual Return 2016 rr_AnnualReturn2016 0.07%
Annual Return 2017 rr_AnnualReturn2017 5.14%
Year to Date Return, Label rr_YearToDateReturnLabel Year-to-date total return as of 9/30/2018 is -0.19%
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (0.19%)
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2018
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter: 3rd Quarter 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 6.78%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2009
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter: 4th Quarter 2010
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (4.32%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2010
1 Year rr_AverageAnnualReturnYear01 0.40%
5 Years rr_AverageAnnualReturnYear05 2.33%
10 Years rr_AverageAnnualReturnYear10 3.59%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Jul. 31, 1995
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Colorado Tax-Free Fund) | Class A | (after taxes on distributions)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 0.40%
5 Years rr_AverageAnnualReturnYear05 2.33%
10 Years rr_AverageAnnualReturnYear10 3.58%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Jul. 31, 1995
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Colorado Tax-Free Fund) | Class A | (after taxes on distributions and the sale of Fund Shares)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 1.58%
5 Years rr_AverageAnnualReturnYear05 2.50%
10 Years rr_AverageAnnualReturnYear10 3.57%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Jul. 31, 1995
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Colorado Tax-Free Fund) | Class C  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management Fees rr_ManagementFeesOverAssets 0.40%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.75%
Other Expenses rr_OtherExpensesOverAssets 0.45%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.60%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets none
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 1.60% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 263
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 505
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 871
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,900
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 163
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 505
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 871
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,900
1 Year rr_AverageAnnualReturnYear01 3.45%
5 Years rr_AverageAnnualReturnYear05 2.52%
10 Years rr_AverageAnnualReturnYear10 3.28%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Mar. 31, 2008
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo High Yield Municipal Bond Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Investment Objective </b></p>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund seeks high current income exempt from federal income tax, and capital appreciation.
Expense [Heading] rr_ExpenseHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Fees and Expenses </b></p>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

These tables are intended to help you understand the various costs and expenses you will pay if you buy and hold shares of the Fund. 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 aggregate in specified classes of certain Wells Fargo Funds. More information about these and other discounts is available from your financial professional and in "Share Class Features" and "Reductions and Waivers of Sales Charges" on pages 84 and 86 of the Prospectus and "Additional Purchase and Redemption Information" on page 69 of the Statement of Additional Information. Investors who purchase through certain intermediaries may be subject to different sales charge discounts than those outlined shares in these sections. Please see Appendix A on page 110 for further information.
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts 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 aggregate in specified classes of certain Wells Fargo Funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Shareholder Fees (fees paid directly from your investment) </b></p>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) </b></p> [5]
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination October 31, 2019
Expenses Restated to Reflect Current [Text] rr_ExpensesRestatedToReflectCurrent Expenses have been adjusted as necessary from amounts incurred during the Fund's most recent fiscal year to reflect current fees and expenses.
Expenses Deferred Charges [Text Block] rr_ExpensesDeferredChargesTextBlock Investments of $1 million or more are not subject to a front-end sales charge but generally will be subject to a deferred sales charge of 1.00% if redeemed within 18 months from the date of purchase.
Expense Example [Heading] rr_ExpenseExampleHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Example of Expenses </b></p>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The example below is intended to help you compare the costs of investing in the Fund with the costs of investing in other mutual funds. The example assumes a $10,000 initial investment, 5% annual total return, and that fees and expenses remain the same as in the tables above. To the extent that the Manager is waiving fees or reimbursing expenses, the example assumes that such waiver or reimbursement will only be in place through the date noted above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming Redemption at End of Period </b></p>
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming No Redemption </b></p>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Portfolio Turnover </b></p>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

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 fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 50% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 50.00%
Strategy [Heading] rr_StrategyHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Strategies </b></p>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

Under normal circumstances, we invest:

  • at least 80% of the Fund's net assets in municipal securities whose interest is exempt from federal income tax, but not necessarily federal alternative minimum tax ("AMT");

  • up to 20% of the Fund's total assets in securities whose interest is subject to federal AMT;

  • at least 50% of the Fund's total assets in municipal securities rated BBB and below or comparable unrated municipal securities; and

  • up to 20% of the Fund's total assets in inverse floaters.

We invest principally in municipal securities of states, territories and possessions of the United States whose interest is exempt from federal income tax, but not necessarily federal AMT. A substantial portion of the securities will be rated BBB and below or unrated and deemed by us to be of comparable quality. Securities rated BB and below are often called "high yield" securities or "junk bonds". We may invest in municipal debt of any credit quality. We may also invest a portion of the Fund's total assets in securities whose interest is subject to federal AMT. We may use futures for duration and yield curve management. While we may purchase securities of any maturity, under normal circumstances, we expect the Fund's dollar-weighted average effective maturity to be between 3 and 20 years. "Dollar-weighted average effective maturity" is a measure of the average time until the final payment of principal and interest is due on fixed income securities in the Fund's portfolio.

We may invest up to 20% of the Fund's total assets in inverse floaters to seek enhanced returns. Inverse floaters are derivative debt instruments created by depositing a municipal security in a trust. Inverse floaters pay interest at rates that generally vary inversely with specified short-term interest rates and involve leverage. We intend to limit leverage created by the Fund's investments in inverse floaters to an amount equal to 20% of the Fund's total assets.

We use a combination of top-down and bottom-up research to cover the four main elements of total return: duration management, yield curve positioning, sector and credit quality allocation, and security selection. Our top-down analysis involves an evaluation of macroeconomic factors that may include, among others, the pace of economic growth, employment conditions, inflation, and monetary and fiscal policy. Our bottom-up analysis, which involves intensive research into the credit fundamentals of individual issuers and the relative value of individual issues, is used to uncover solid investment opportunities. Securities are selected based on several factors, including, among others, improving financial trends, positive industry and sector dynamics, improving economic conditions, and specific demographic trends. Securities may be sold based on relative value considerations and could be replaced with a security that presents a better value or risk/reward profile. A security may also be sold due to changes in credit characteristics or outlook, as well as changes in portfolio strategy or cash flow needs.
Risk [Heading] rr_RiskHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Risks </b></p>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency, and is primarily subject to the risks briefly summarized below.

Credit Risk. The issuer or guarantor of a debt security may be unable or perceived to be unable to pay interest or repay principal when they become due, which could cause the value of an investment to decline and a Fund to lose money.

Derivatives Risk. The use of derivatives, such as futures, options and swap agreements, can lead to losses, including those magnified by leverage, particularly when derivatives are used to enhance return rather than mitigate risk. Certain derivative instruments may be difficult to sell when the portfolio manager believes it would be appropriate to do so, or the other party to a derivative contract may be unwilling or unable to fulfill its contractual obligations.

Futures Contracts Risk. A Fund that uses futures contracts, which are a type of derivative, is subject to the risk of loss caused by unanticipated market movements. In addition, there may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes and there may at times not be a liquid secondary market for certain futures contracts.

High Yield Securities Risk. High yield securities and unrated securities of similar credit quality (commonly known as "junk bonds") have a much greater risk of default or of not returning principal and their values tend to be more volatile than higher-rated securities with similar maturities.

Interest Rate Risk. When interest rates rise, the value of debt securities tends to fall. When interest rates decline, interest that a Fund is able to earn on its investments in debt securities may also decline, but the value of those securities may increase.

Inverse Floater Risk. The holder of an inverse floater, which is a type of derivative, could lose more than its principal investment. An inverse floater produces less income and may decline in value when market rates and the rate payable on the floater rises. An inverse floater typically involves leverage, which may magnify a Fund's losses, and exhibits greater price and income volatility than an unleveraged bond with a similar maturity.

Management Risk. Investment decisions, techniques, analyses or models implemented by a Fund's manager or sub-adviser in seeking to achieve the Fund's investment objective may not produce the returns expected, may cause the Fund's shares to lose value or may cause the Fund to underperform other funds with similar investment objectives.

Market Risk. The values of, and/or the income generated by, securities held by a Fund may decline due to general market conditions or other factors, including those directly involving the issuers of such securities. Security markets are volatile and may decline significantly in response to adverse issuer, regulatory, political, or economic developments. Different sectors of the market and different security types may react differently to such developments.

Municipal Securities Risk. Municipal securities may be fully or partially backed or enhanced by the taxing authority of a local government, by the current or anticipated revenues from a specific project or specific assets, or by the credit of, or liquidity enhancement provided by, a private issuer. Various types of municipal securities are often related in such a way that political, economic or business developments affecting one obligation could affect other municipal securities held by a Fund.
Risk Lose Money [Text] rr_RiskLoseMoney An investment in the Fund may lose money
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Performance </b></p>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year. The Fund's average annual total returns are compared to the performance of one or more indices. Past performance before and after taxes is no guarantee of future results. Current month-end performance is available on the Fund's website at wellsfargofunds.com.
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Returns do not reflect sales charges and would be lower if they did
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Highest Quarter: 1st Quarter 2014

+5.86%

Lowest Quarter: 4th Quarter 2016

-5.17%

Year-to-date total return as of 9/30/2018 is +2.66%
Performance Table Heading rr_PerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Average Annual Total Returns for the periods ended 12/31/2017 (returns reflect applicable sales charges) </b></p>
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts. After-tax returns are shown for only one class of shares. After-tax returns for any other class will vary.
Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads returns reflect applicable sales charges
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance before and after taxes is no guarantee of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown for only one class of shares.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress wellsfargofunds.com
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo High Yield Municipal Bond Fund) | Bloomberg Barclays Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 5.45%
5 Years rr_AverageAnnualReturnYear05
Since Inception rr_AverageAnnualReturnSinceInception 2.99% [6]
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo High Yield Municipal Bond Fund) | Bloomberg Barclays High Yield Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 9.69%
5 Years rr_AverageAnnualReturnYear05
Since Inception rr_AverageAnnualReturnSinceInception 4.19% [6]
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo High Yield Municipal Bond Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 4.50%
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [3]
Management Fees rr_ManagementFeesOverAssets 0.50%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.57%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.07%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets (0.27%)
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 0.80% [7]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 528
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 749
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 989
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,674
Bar Chart [Heading] rr_BarChartHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b>Calendar Year Total Returns for Class A as of 12/31 each year (Returns do not reflect sales charges and would be lower if they did)</b> </p>
Annual Return 2014 rr_AnnualReturn2014 15.61%
Annual Return 2015 rr_AnnualReturn2015 4.52%
Annual Return 2016 rr_AnnualReturn2016 (0.39%)
Annual Return 2017 rr_AnnualReturn2017 8.72%
Year to Date Return, Label rr_YearToDateReturnLabel Year-to-date total return as of 9/30/2018 is +2.66%
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 2.66%
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2018
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter: 1st Quarter 2014
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 5.86%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2014
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter: 4th Quarter 2016
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (5.17%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2016
1 Year rr_AverageAnnualReturnYear01 3.79%
5 Years rr_AverageAnnualReturnYear05
Since Inception rr_AverageAnnualReturnSinceInception 4.27% [6]
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Jan. 31, 2013
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo High Yield Municipal Bond Fund) | Class A | (after taxes on distributions)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 3.77%
5 Years rr_AverageAnnualReturnYear05
Since Inception rr_AverageAnnualReturnSinceInception 4.06% [6]
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Jan. 31, 2013
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo High Yield Municipal Bond Fund) | Class A | (after taxes on distributions and the sale of Fund Shares)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 3.74%
5 Years rr_AverageAnnualReturnYear05
Since Inception rr_AverageAnnualReturnSinceInception 3.99% [6]
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Jan. 31, 2013
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo High Yield Municipal Bond Fund) | Class C  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management Fees rr_ManagementFeesOverAssets 0.50%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.75%
Other Expenses rr_OtherExpensesOverAssets 0.57%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.82%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets (0.27%)
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 1.55% [7]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 258
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 546
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 960
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,115
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 158
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 546
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 960
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,115
1 Year rr_AverageAnnualReturnYear01 6.91%
5 Years rr_AverageAnnualReturnYear05
Since Inception rr_AverageAnnualReturnSinceInception 4.47% [6]
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Jan. 31, 2013
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Intermediate Tax/AMT-Free Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Investment Objective </b></p>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund seeks current income exempt from federal income tax.
Expense [Heading] rr_ExpenseHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Fees and Expenses </b></p>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

These tables are intended to help you understand the various costs and expenses you will pay if you buy and hold shares of the Fund. 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 aggregate in specified classes of certain Wells Fargo Funds. More information about these and other discounts is available from your financial professional and in "Share Class Features" and "Reductions and Waivers of Sales Charges" on pages 84 and 86 of the Prospectus and "Additional Purchase and Redemption Information" on page 69 of the Statement of Additional Information. Investors who purchase through certain intermediaries may be subject to different sales charge discounts than those outlined shares in these sections. Please see Appendix A on page 110 for further information.
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts 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 aggregate in specified classes of certain Wells Fargo Funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Shareholder Fees (fees paid directly from your investment) </b></p>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) </b></p> [5]
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination October 31, 2019
Expenses Restated to Reflect Current [Text] rr_ExpensesRestatedToReflectCurrent Expenses have been adjusted as necessary from amounts incurred during the Fund's most recent fiscal year to reflect current fees and expenses.
Expenses Deferred Charges [Text Block] rr_ExpensesDeferredChargesTextBlock Investments of $500,000 or more are not subject to a front-end sales charge but generally will be subject to a deferred sales charge of 0.50% if redeemed within 12 months from the date of purchase.
Expense Example [Heading] rr_ExpenseExampleHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Example of Expenses </b></p>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The example below is intended to help you compare the costs of investing in the Fund with the costs of investing in other mutual funds. The example assumes a $10,000 initial investment, 5% annual total return, and that fees and expenses remain the same as in the tables above. To the extent that the Manager is waiving fees or reimbursing expenses, the example assumes that such waiver or reimbursement will only be in place through the date noted above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming Redemption at End of Period </b></p>
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming No Redemption </b></p>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Portfolio Turnover </b></p>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

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 fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 14% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 14.00%
Strategy [Heading] rr_StrategyHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Strategies </b></p>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

Under normal circumstances, we invest:

  • at least 80% of the Fund's net assets in municipal securities whose interest is exempt from federal income tax, including federal alternative minimum tax (AMT);

  • up to 15% of the Fund's total assets in below investment-grade municipal securities; and

  • up to 10% of the Fund's total assets in inverse floaters.

We invest principally in municipal securities of states, territories and possessions of the United States whose interest is exempt from federal income tax, including federal AMT. Some of the securities may be below investment grade or unrated and deemed by us to be of comparable quality. Under normal circumstances, we do not invest in securities whose interest is subject to federal income tax, including federal AMT. We may use futures for duration and yield curve management. While we may purchase securities of any maturity, under normal circumstances, we expect the Fund's dollar-weighted average effective maturity to be between 3 and 10 years.

We may invest up to 10% of the Fund's total assets in inverse floaters to seek enhanced returns. Inverse floaters are derivative debt instruments created by depositing a municipal security in a trust. Inverse floaters pay interest at rates that generally vary inversely with specified short-term interest rates and involve leverage. We intend to limit leverage created by the Fund's investment in inverse floaters to an amount equal to 10% of the Fund's total assets.

We use a combination of top-down and bottom-up research to cover the four main elements of total return: duration management, yield curve positioning, sector and credit quality allocation, and security selection. Our top-down analysis involves an evaluation of macroeconomic factors that may include, among others, the pace of economic growth, employment conditions, inflation, and monetary and fiscal policy. Our bottom-up analysis, which involves intensive research into the credit fundamentals of individual issuers and the relative value of individual issues, is used to uncover solid investment opportunities. Securities are selected based on several factors, including, among others, improving financial trends, positive industry and sector dynamics, improving economic conditions, and specific demographic trends. Securities may be sold based on relative value considerations and could be replaced with a security that presents a better value or risk/reward profile. A security may also be sold due to changes in credit characteristics or outlook, as well as changes in portfolio strategy or cash flow needs.
Risk [Heading] rr_RiskHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Risks </b></p>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency, and is primarily subject to the risks briefly summarized below.

Credit Risk. The issuer or guarantor of a debt security may be unable or perceived to be unable to pay interest or repay principal when they become due, which could cause the value of an investment to decline and a Fund to lose money.

Derivatives Risk. The use of derivatives, such as futures, options and swap agreements, can lead to losses, including those magnified by leverage, particularly when derivatives are used to enhance return rather than mitigate risk. Certain derivative instruments may be difficult to sell when the portfolio manager believes it would be appropriate to do so, or the other party to a derivative contract may be unwilling or unable to fulfill its contractual obligations.

Futures Contracts Risk. A Fund that uses futures contracts, which are a type of derivative, is subject to the risk of loss caused by unanticipated market movements. In addition, there may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes and there may at times not be a liquid secondary market for certain futures contracts.

High Yield Securities Risk. High yield securities and unrated securities of similar credit quality (commonly known as "junk bonds") have a much greater risk of default or of not returning principal and their values tend to be more volatile than higher-rated securities with similar maturities.

Interest Rate Risk. When interest rates rise, the value of debt securities tends to fall. When interest rates decline, interest that a Fund is able to earn on its investments in debt securities may also decline, but the value of those securities may increase.

Inverse Floater Risk. The holder of an inverse floater, which is a type of derivative, could lose more than its principal investment. An inverse floater produces less income and may decline in value when market rates and the rate payable on the floater rises. An inverse floater typically involves leverage, which may magnify a Fund's losses, and exhibits greater price and income volatility than an unleveraged bond with a similar maturity.

Management Risk. Investment decisions, techniques, analyses or models implemented by a Fund's manager or sub-adviser in seeking to achieve the Fund's investment objective may not produce the returns expected, may cause the Fund's shares to lose value or may cause the Fund to underperform other funds with similar investment objectives.

Market Risk. The values of, and/or the income generated by, securities held by a Fund may decline due to general market conditions or other factors, including those directly involving the issuers of such securities. Security markets are volatile and may decline significantly in response to adverse issuer, regulatory, political, or economic developments. Different sectors of the market and different security types may react differently to such developments.

Municipal Securities Risk. Municipal securities may be fully or partially backed or enhanced by the taxing authority of a local government, by the current or anticipated revenues from a specific project or specific assets, or by the credit of, or liquidity enhancement provided by, a private issuer. Various types of municipal securities are often related in such a way that political, economic or business developments affecting one obligation could affect other municipal securities held by a Fund.
Risk Lose Money [Text] rr_RiskLoseMoney An investment in the Fund may lose money
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Performance </b></p>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year. The Fund's average annual total returns are compared to the performance of one or more indices. Past performance before and after taxes is no guarantee of future results. Current month-end performance is available on the Fund's website at wellsfargofunds.com.
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Returns do not reflect sales charges and would be lower if they did
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Highest Quarter: 3rd Quarter 2009

+7.00%

Lowest Quarter: 4th Quarter 2008

-4.27%

Year-to-date total return as of 9/30/2018 is -0.53%
Performance Table Heading rr_PerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Average Annual Total Returns for the periods ended 12/31/2017 (returns reflect applicable sales charges) </b></p>
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts. After-tax returns are shown for only one class of shares. After-tax returns for any other class will vary.
Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads returns reflect applicable sales charges
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance before and after taxes is no guarantee of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown for only one class of shares.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress wellsfargofunds.com
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Intermediate Tax/AMT-Free Fund) | Bloomberg Barclays Municipal Bond 1-15 Year Blend Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 4.33%
5 Years rr_AverageAnnualReturnYear05 2.46%
10 Years rr_AverageAnnualReturnYear10 3.99%
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Intermediate Tax/AMT-Free Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 3.00%
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [8]
Management Fees rr_ManagementFeesOverAssets 0.36%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.43%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.79%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets (0.09%)
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 0.70% [9]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 369
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 536
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 717
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,240
Bar Chart [Heading] rr_BarChartHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b>Calendar Year Total Returns for Class A as of 12/31 each year (Returns do not reflect sales charges and would be lower if they did)</b> </p>
Annual Return 2008 rr_AnnualReturn2008 (5.72%)
Annual Return 2009 rr_AnnualReturn2009 15.19%
Annual Return 2010 rr_AnnualReturn2010 3.38%
Annual Return 2011 rr_AnnualReturn2011 9.34%
Annual Return 2012 rr_AnnualReturn2012 6.44%
Annual Return 2013 rr_AnnualReturn2013 (1.65%)
Annual Return 2014 rr_AnnualReturn2014 7.30%
Annual Return 2015 rr_AnnualReturn2015 2.05%
Annual Return 2016 rr_AnnualReturn2016 (0.93%)
Annual Return 2017 rr_AnnualReturn2017 4.40%
Year to Date Return, Label rr_YearToDateReturnLabel Year-to-date total return as of 9/30/2018 is -0.53%
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (0.53%)
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2018
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter: 3rd Quarter 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 7.00%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2009
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter: 4th Quarter 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (4.27%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
1 Year rr_AverageAnnualReturnYear01 1.27%
5 Years rr_AverageAnnualReturnYear05 1.56%
10 Years rr_AverageAnnualReturnYear10 3.51%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Jul. 31, 2007
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Intermediate Tax/AMT-Free Fund) | Class A | (after taxes on distributions)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 1.18%
5 Years rr_AverageAnnualReturnYear05 1.49%
10 Years rr_AverageAnnualReturnYear10 3.45%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Jul. 31, 2007
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Intermediate Tax/AMT-Free Fund) | Class A | (after taxes on distributions and the sale of Fund Shares)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 1.66%
5 Years rr_AverageAnnualReturnYear05 1.69%
10 Years rr_AverageAnnualReturnYear10 3.36%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Jul. 31, 2007
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Intermediate Tax/AMT-Free Fund) | Class C  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management Fees rr_ManagementFeesOverAssets 0.36%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.75%
Other Expenses rr_OtherExpensesOverAssets 0.43%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.54%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets (0.09%)
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 1.45% [9]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 248
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 478
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 831
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,827
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 148
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 478
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 831
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,827
1 Year rr_AverageAnnualReturnYear01 2.62%
5 Years rr_AverageAnnualReturnYear05 1.42%
10 Years rr_AverageAnnualReturnYear10 3.05%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Jul. 31, 2007
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Minnesota Tax-Free Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Investment Objective </b></p>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund seeks current income exempt from federal income tax and Minnesota individual income tax.
Expense [Heading] rr_ExpenseHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Fees and Expenses </b></p>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

These tables are intended to help you understand the various costs and expenses you will pay if you buy and hold shares of the Fund. 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 aggregate in specified classes of certain Wells Fargo Funds. More information about these and other discounts is available from your financial professional and in "Share Class Features" and "Reductions and Waivers of Sales Charges" on pages 84 and 86 of the Prospectus and "Additional Purchase and Redemption Information" on page 69 of the Statement of Additional Information. Investors who purchase through certain intermediaries may be subject to different sales charge discounts than those outlined shares in these sections. Please see Appendix A on page 110 for further information.
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts 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 aggregate in specified classes of certain Wells Fargo Funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Shareholder Fees (fees paid directly from your investment) </b></p>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) </b></p> [5]
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination October 31, 2019
Expenses Restated to Reflect Current [Text] rr_ExpensesRestatedToReflectCurrent Expenses have been adjusted as necessary from amounts incurred during the Fund's most recent fiscal year to reflect current fees and expenses.
Expenses Deferred Charges [Text Block] rr_ExpensesDeferredChargesTextBlock Investments of $1 million or more are not subject to a front-end sales charge but generally will be subject to a deferred sales charge of 1.00% if redeemed within 18 months from the date of purchase.
Expense Example [Heading] rr_ExpenseExampleHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Example of Expenses </b></p>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The example below is intended to help you compare the costs of investing in the Fund with the costs of investing in other mutual funds. The example assumes a $10,000 initial investment, 5% annual total return, and that fees and expenses remain the same as in the tables above. To the extent that the Manager is waiving fees or reimbursing expenses, the example assumes that such waiver or reimbursement will only be in place through the date noted above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming Redemption at End of Period </b></p>
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming No Redemption </b></p>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Portfolio Turnover </b></p>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

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 fund 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, Rate rr_PortfolioTurnoverRate 15.00%
Strategy [Heading] rr_StrategyHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Strategies </b></p>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

Under normal circumstances, we invest:

  • at least 80% of the Fund's net assets in municipal securities whose interest is exempt from federal income tax, including federal alternative minimum tax (AMT), and Minnesota individual income tax;

  • up to 20% of the Fund's net assets in securities whose interest is subject to federal income tax, including federal AMT;

  • up to 10% of the Fund's total assets in below investment-grade municipal securities; and

  • up to 10% of the Fund's total assets in inverse floaters.

We invest principally in municipal securities whose interest is exempt from federal income tax, including federal AMT, and Minnesota individual income tax. Our investment holdings may include municipal securities issued by the state of Minnesota and its subdivisions, authorities, instrumentalities and corporations, as well as municipal securities issued by the territories and possessions of the United States. Some of the securities may be below investment grade or may be unrated and deemed by us to be of comparable quality. We may also invest a portion of the Fund's net assets in securities whose interest is subject to federal income tax, including federal AMT. While the Fund is required, under normal circumstances, to invest at least 80% of the Fund's net assets in municipal securities whose interest is exempt from Minnesota individual income tax, we currently intend to manage the portfolio so that at least 95% of the income generated by the Fund is exempt from Minnesota individual income tax. We may use futures for duration and yield curve management. While we may purchase securities of any maturity, under normal circumstances, we expect the Fund's dollar-weighted average effective maturity to be between 3 and 20 years.

We may invest up to 10% of the Fund's total assets in inverse floaters to seek enhanced returns. Inverse floaters are derivative debt instruments created by depositing a municipal security in a trust. Inverse floaters pay interest at rates that generally vary inversely with specified short-term interest rates and involve leverage. We intend to limit leverage created by the Fund's investment in inverse floaters to an amount equal to 10% of the Fund's total assets.

We use a combination of top-down and bottom-up research to cover the four main elements of total return: duration management, yield curve positioning, sector and credit quality allocation, and security selection. Our top-down analysis involves an evaluation of macroeconomic factors that may include, among others, the pace of economic growth, employment conditions, inflation, and monetary and fiscal policy. Our bottom-up analysis, which involves intensive research into the credit fundamentals of individual issuers and the relative value of individual issues, is used to uncover solid investment opportunities. Securities are selected based on several factors, including, among others, improving financial trends, positive industry and sector dynamics, improving economic conditions, and specific demographic trends. Securities may be sold based on relative value considerations and could be replaced with a security that presents a better value or risk/reward profile. A security may also be sold due to changes in credit characteristics or outlook, as well as changes in portfolio strategy or cash flow needs.
Risk [Heading] rr_RiskHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Risks </b></p>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency, and is primarily subject to the risks briefly summarized below.

Credit Risk. The issuer or guarantor of a debt security may be unable or perceived to be unable to pay interest or repay principal when they become due, which could cause the value of an investment to decline and a Fund to lose money.

Derivatives Risk. The use of derivatives, such as futures, options and swap agreements, can lead to losses, including those magnified by leverage, particularly when derivatives are used to enhance return rather than mitigate risk. Certain derivative instruments may be difficult to sell when the portfolio manager believes it would be appropriate to do so, or the other party to a derivative contract may be unwilling or unable to fulfill its contractual obligations.

Futures Contracts Risk. A Fund that uses futures contracts, which are a type of derivative, is subject to the risk of loss caused by unanticipated market movements. In addition, there may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes and there may at times not be a liquid secondary market for certain futures contracts.

High Yield Securities Risk. High yield securities and unrated securities of similar credit quality (commonly known as "junk bonds") have a much greater risk of default or of not returning principal and their values tend to be more volatile than higher-rated securities with similar maturities.

Interest Rate Risk. When interest rates rise, the value of debt securities tends to fall. When interest rates decline, interest that a Fund is able to earn on its investments in debt securities may also decline, but the value of those securities may increase.

Inverse Floater Risk. The holder of an inverse floater, which is a type of derivative, could lose more than its principal investment. An inverse floater produces less income and may decline in value when market rates and the rate payable on the floater rises. An inverse floater typically involves leverage, which may magnify a Fund's losses, and exhibits greater price and income volatility than an unleveraged bond with a similar maturity.

Management Risk. Investment decisions, techniques, analyses or models implemented by a Fund's manager or sub-adviser in seeking to achieve the Fund's investment objective may not produce the returns expected, may cause the Fund's shares to lose value or may cause the Fund to underperform other funds with similar investment objectives.

Market Risk. The values of, and/or the income generated by, securities held by a Fund may decline due to general market conditions or other factors, including those directly involving the issuers of such securities. Security markets are volatile and may decline significantly in response to adverse issuer, regulatory, political, or economic developments. Different sectors of the market and different security types may react differently to such developments.

Municipal Securities Risk. Municipal securities may be fully or partially backed or enhanced by the taxing authority of a local government, by the current or anticipated revenues from a specific project or specific assets, or by the credit of, or liquidity enhancement provided by, a private issuer. Various types of municipal securities are often related in such a way that political, economic or business developments affecting one obligation could affect other municipal securities held by a Fund.

State Emphasis Risk. Securities issued by a particular state and its subdivisions, authorities, instrumentalities and corporations are subject to the risk of unfavorable developments occurring in such state. Such developments may adversely impact the liquidity and value of the municipal securities in which a Fund invests and, in turn, adversely impact the value of the Fund's shares.
Risk Lose Money [Text] rr_RiskLoseMoney An investment in the Fund may lose money
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Performance </b></p>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year. The Fund's average annual total returns are compared to the performance of one or more indices. Past performance before and after taxes is no guarantee of future results. Current month-end performance is available on the Fund's website at wellsfargofunds.com.
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Returns do not reflect sales charges and would be lower if they did
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Highest Quarter: 3rd Quarter 2009

+5.82%

Lowest Quarter: 4th Quarter 2010

-3.71%

Year-to-date total return as of 9/30/2018 is -0.33%
Performance Table Heading rr_PerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Average Annual Total Returns for the periods ended 12/31/2017 (returns reflect applicable sales charges) </b></p>
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts. After-tax returns are shown for only one class of shares. After-tax returns for any other class will vary.
Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads returns reflect applicable sales charges
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance before and after taxes is no guarantee of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown for only one class of shares.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress wellsfargofunds.com
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Minnesota Tax-Free Fund) | Bloomberg Barclays Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 5.45%
5 Years rr_AverageAnnualReturnYear05 3.02%
10 Years rr_AverageAnnualReturnYear10 4.46%
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Minnesota Tax-Free Fund) | Bloomberg Barclays Minnesota Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 4.53%
5 Years rr_AverageAnnualReturnYear05 2.48%
10 Years rr_AverageAnnualReturnYear10 4.14%
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Minnesota Tax-Free Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 4.50%
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [3]
Management Fees rr_ManagementFeesOverAssets 0.40%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.44%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.84%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets none
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 0.84% [10]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 532
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 706
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 895
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,441
Bar Chart [Heading] rr_BarChartHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b>Calendar Year Total Returns for Class A as of 12/31 each year (Returns do not reflect sales charges and would be lower if they did)</b> </p>
Annual Return 2008 rr_AnnualReturn2008 (3.47%)
Annual Return 2009 rr_AnnualReturn2009 12.32%
Annual Return 2010 rr_AnnualReturn2010 1.88%
Annual Return 2011 rr_AnnualReturn2011 9.75%
Annual Return 2012 rr_AnnualReturn2012 5.83%
Annual Return 2013 rr_AnnualReturn2013 (1.36%)
Annual Return 2014 rr_AnnualReturn2014 6.85%
Annual Return 2015 rr_AnnualReturn2015 2.64%
Annual Return 2016 rr_AnnualReturn2016 0.41%
Annual Return 2017 rr_AnnualReturn2017 3.74%
Year to Date Return, Label rr_YearToDateReturnLabel Year-to-date total return as of 9/30/2018 is -0.33%
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (0.33%)
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2018
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter: 3rd Quarter 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 5.82%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2009
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter: 4th Quarter 2010
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (3.71%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2010
1 Year rr_AverageAnnualReturnYear01 (0.93%)
5 Years rr_AverageAnnualReturnYear05 1.48%
10 Years rr_AverageAnnualReturnYear10 3.28%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Jan. 12, 1988
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Minnesota Tax-Free Fund) | Class A | (after taxes on distributions)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (0.96%)
5 Years rr_AverageAnnualReturnYear05 1.38%
10 Years rr_AverageAnnualReturnYear10 3.19%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Jan. 12, 1988
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Minnesota Tax-Free Fund) | Class A | (after taxes on distributions and the sale of Fund Shares)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 0.56%
5 Years rr_AverageAnnualReturnYear05 1.77%
10 Years rr_AverageAnnualReturnYear10 3.29%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Jan. 12, 1988
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Minnesota Tax-Free Fund) | Class C  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management Fees rr_ManagementFeesOverAssets 0.40%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.75%
Other Expenses rr_OtherExpensesOverAssets 0.44%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.59%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets none
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 1.59% [10]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 262
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 502
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 866
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,889
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 162
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 502
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 866
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,889
1 Year rr_AverageAnnualReturnYear01 1.96%
5 Years rr_AverageAnnualReturnYear05 1.65%
10 Years rr_AverageAnnualReturnYear10 2.98%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Apr. 08, 2005
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Municipal Bond Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Investment Objective </b></p>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund seeks current income exempt from federal income tax.
Expense [Heading] rr_ExpenseHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Fees and Expenses </b></p>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

These tables are intended to help you understand the various costs and expenses you will pay if you buy and hold shares of the Fund. 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 aggregate in specified classes of certain Wells Fargo Funds. More information about these and other discounts is available from your financial professional and in "Share Class Features" and "Reductions and Waivers of Sales Charges" on pages 84 and 86 of the Prospectus and "Additional Purchase and Redemption Information" on page 69 of the Statement of Additional Information. Investors who purchase through certain intermediaries may be subject to different sales charge discounts than those outlined shares in these sections. Please see Appendix A on page 110 for further information.
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts 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 aggregate in specified classes of certain Wells Fargo Funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Shareholder Fees (fees paid directly from your investment) </b></p>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) </b></p>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination October 31, 2019
Expenses Deferred Charges [Text Block] rr_ExpensesDeferredChargesTextBlock Investments of $1 million or more are not subject to a front-end sales charge but generally will be subject to a deferred sales charge of 1.00% if redeemed within 18 months from the date of purchase.
Expense Example [Heading] rr_ExpenseExampleHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Example of Expenses </b></p>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The example below is intended to help you compare the costs of investing in the Fund with the costs of investing in other mutual funds. The example assumes a $10,000 initial investment, 5% annual total return, and that fees and expenses remain the same as in the tables above. To the extent that the Manager is waiving fees or reimbursing expenses, the example assumes that such waiver or reimbursement will only be in place through the date noted above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming Redemption at End of Period </b></p>
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming No Redemption </b></p>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Portfolio Turnover </b></p>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

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 fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 19% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 19.00%
Strategy [Heading] rr_StrategyHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Strategies </b></p>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

Under normal circumstances, we invest:

  • at least 80% of the Fund's net assets in municipal securities whose interest is exempt from federal income tax, but not necessarily federal alternative minimum tax (AMT);

  • up to 20% of the Fund's total assets in securities whose interest is subject to federal AMT;

  • up to 20% of the Fund's total assets in below investment-grade municipal securities; and

  • up to 10% of the Fund's total assets in inverse floaters.

We invest principally in municipal securities of states, territories and possessions of the United States whose interest is exempt from federal income tax, but not necessarily federal AMT. Some of the securities may be below investment grade or may be unrated and deemed by us to be of comparable quality. We may also invest a portion of the Fund's assets in securities whose interest is subject to federal AMT. We may use futures for duration and yield curve management. While we may purchase securities of any maturity, under normal circumstances, we expect the Fund's dollar-weighted average effective maturity to be between 3 and 20 years.

We may invest up to 10% of the Fund's total assets in inverse floaters to seek enhanced returns. Inverse floaters are derivative debt instruments created by depositing a municipal security in a trust. Inverse floaters pay interest at rates that generally vary inversely with specified short-term interest rates and involve leverage. We intend to limit leverage created by the Fund's investment in inverse floaters to an amount equal to 10% of the Fund's total assets.

We use a combination of top-down and bottom-up research to cover the four main elements of total return: duration management, yield curve positioning, sector and credit quality allocation, and security selection. Our top-down analysis involves an evaluation of macroeconomic factors that may include, among others, the pace of economic growth, employment conditions, inflation, and monetary and fiscal policy. Our bottom-up analysis, which involves intensive research into the credit fundamentals of individual issuers and the relative value of individual issues, is used to uncover solid investment opportunities. Securities are selected based on several factors, including, among others, improving financial trends, positive industry and sector dynamics, improving economic conditions, and specific demographic trends. Securities may be sold based on relative value considerations and could be replaced with a security that presents a better value or risk/reward profile. A security may also be sold due to changes in credit characteristics or outlook, as well as changes in portfolio strategy or cash flow needs.
Risk [Heading] rr_RiskHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Risks </b></p>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency, and is primarily subject to the risks briefly summarized below.

Credit Risk. The issuer or guarantor of a debt security may be unable or perceived to be unable to pay interest or repay principal when they become due, which could cause the value of an investment to decline and a Fund to lose money.

Derivatives Risk. The use of derivatives, such as futures, options and swap agreements, can lead to losses, including those magnified by leverage, particularly when derivatives are used to enhance return rather than mitigate risk. Certain derivative instruments may be difficult to sell when the portfolio manager believes it would be appropriate to do so, or the other party to a derivative contract may be unwilling or unable to fulfill its contractual obligations.

Futures Contracts Risk. A Fund that uses futures contracts, which are a type of derivative, is subject to the risk of loss caused by unanticipated market movements. In addition, there may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes and there may at times not be a liquid secondary market for certain futures contracts.

High Yield Securities Risk. High yield securities and unrated securities of similar credit quality (commonly known as "junk bonds") have a much greater risk of default or of not returning principal and their values tend to be more volatile than higher-rated securities with similar maturities.

Interest Rate Risk. When interest rates rise, the value of debt securities tends to fall. When interest rates decline, interest that a Fund is able to earn on its investments in debt securities may also decline, but the value of those securities may increase.

Inverse Floater Risk. The holder of an inverse floater, which is a type of derivative, could lose more than its principal investment. An inverse floater produces less income and may decline in value when market rates and the rate payable on the floater rises. An inverse floater typically involves leverage, which may magnify a Fund's losses, and exhibits greater price and income volatility than an unleveraged bond with a similar maturity.

Management Risk. Investment decisions, techniques, analyses or models implemented by a Fund's manager or sub-adviser in seeking to achieve the Fund's investment objective may not produce the returns expected, may cause the Fund's shares to lose value or may cause the Fund to underperform other funds with similar investment objectives.

Market Risk. The values of, and/or the income generated by, securities held by a Fund may decline due to general market conditions or other factors, including those directly involving the issuers of such securities. Security markets are volatile and may decline significantly in response to adverse issuer, regulatory, political, or economic developments. Different sectors of the market and different security types may react differently to such developments.

Municipal Securities Risk. Municipal securities may be fully or partially backed or enhanced by the taxing authority of a local government, by the current or anticipated revenues from a specific project or specific assets, or by the credit of, or liquidity enhancement provided by, a private issuer. Various types of municipal securities are often related in such a way that political, economic or business developments affecting one obligation could affect other municipal securities held by a Fund.
Risk Lose Money [Text] rr_RiskLoseMoney An investment in the Fund may lose money
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Performance </b></p>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year. The Fund's average annual total returns are compared to the performance of one or more indices. Past performance before and after taxes is no guarantee of future results. Current month-end performance is available on the Fund's website at wellsfargofunds.com.
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Returns do not reflect sales charges and would be lower if they did
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Highest Quarter: 3rd Quarter 2009

+9.76%

Lowest Quarter: 4th Quarter 2008

-8.40%

Year-to-date total return as of 9/30/2018 is +0.29%
Performance Table Heading rr_PerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Average Annual Total Returns for the periods ended 12/31/2017 (returns reflect applicable sales charges) </b></p>
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts. After-tax returns are shown for only one class of shares. After-tax returns for any other class will vary.
Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads returns reflect applicable sales charges
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance before and after taxes is no guarantee of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown for only one class of shares.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress wellsfargofunds.com
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Municipal Bond Fund) | Bloomberg Barclays Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 5.45%
5 Years rr_AverageAnnualReturnYear05 3.02%
10 Years rr_AverageAnnualReturnYear10 4.46%
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Municipal Bond Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 4.50%
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [3]
Management Fees rr_ManagementFeesOverAssets 0.36%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.43%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.79%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets (0.04%)
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 0.75% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 523
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 687
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 865
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,380
Bar Chart [Heading] rr_BarChartHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b>Calendar Year Total Returns for Class A as of 12/31 each year (Returns do not reflect sales charges and would be lower if they did)</b> </p>
Annual Return 2008 rr_AnnualReturn2008 (11.74%)
Annual Return 2009 rr_AnnualReturn2009 24.46%
Annual Return 2010 rr_AnnualReturn2010 3.64%
Annual Return 2011 rr_AnnualReturn2011 10.11%
Annual Return 2012 rr_AnnualReturn2012 10.28%
Annual Return 2013 rr_AnnualReturn2013 (1.94%)
Annual Return 2014 rr_AnnualReturn2014 11.08%
Annual Return 2015 rr_AnnualReturn2015 3.26%
Annual Return 2016 rr_AnnualReturn2016 0.17%
Annual Return 2017 rr_AnnualReturn2017 5.95%
Year to Date Return, Label rr_YearToDateReturnLabel Year-to-date total return as of 9/30/2018 is +0.29%
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 0.29%
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2018
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter: 3rd Quarter 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 9.76%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2009
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter: 4th Quarter 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (8.40%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
1 Year rr_AverageAnnualReturnYear01 1.23%
5 Years rr_AverageAnnualReturnYear05 2.65%
10 Years rr_AverageAnnualReturnYear10 4.65%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Apr. 08, 2005
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Municipal Bond Fund) | Class A | (after taxes on distributions)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 1.15%
5 Years rr_AverageAnnualReturnYear05 2.46%
10 Years rr_AverageAnnualReturnYear10 4.46%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Apr. 08, 2005
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Municipal Bond Fund) | Class A | (after taxes on distributions and the sale of Fund Shares)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 2.09%
5 Years rr_AverageAnnualReturnYear05 2.66%
10 Years rr_AverageAnnualReturnYear10 4.36%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Apr. 08, 2005
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Municipal Bond Fund) | Class C  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management Fees rr_ManagementFeesOverAssets 0.36%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.75%
Other Expenses rr_OtherExpensesOverAssets 0.43%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.54%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets (0.04%)
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 1.50% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 253
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 483
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 836
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,831
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 153
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 483
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 836
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,831
1 Year rr_AverageAnnualReturnYear01 4.16%
5 Years rr_AverageAnnualReturnYear05 2.83%
10 Years rr_AverageAnnualReturnYear10 4.36%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Apr. 08, 2005
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo North Carolina Tax-Free Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Investment Objective </b></p>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund seeks current income exempt from federal income tax and North Carolina individual income tax.
Expense [Heading] rr_ExpenseHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Fees and Expenses </b></p>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

These tables are intended to help you understand the various costs and expenses you will pay if you buy and hold shares of the Fund. 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 aggregate in specified classes of certain Wells Fargo Funds. More information about these and other discounts is available from your financial professional and in "Share Class Features" and "Reductions and Waivers of Sales Charges" on pages 84 and 86 of the Prospectus and "Additional Purchase and Redemption Information" on page 69 of the Statement of Additional Information. Investors who purchase through certain intermediaries may be subject to different sales charge discounts than those outlined shares in these sections. Please see Appendix A on page 110 for further information.
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts 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 aggregate in specified classes of certain Wells Fargo Funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Shareholder Fees (fees paid directly from your investment) </b></p>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) </b></p> [5]
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination October 31, 2019
Expenses Restated to Reflect Current [Text] rr_ExpensesRestatedToReflectCurrent Expenses have been adjusted as necessary from amounts incurred during the Fund's most recent fiscal year to reflect current fees and expenses.
Expenses Deferred Charges [Text Block] rr_ExpensesDeferredChargesTextBlock Investments of $1 million or more are not subject to a front-end sales charge but generally will be subject to a deferred sales charge of 1.00% if redeemed within 18 months from the date of purchase.
Expense Example [Heading] rr_ExpenseExampleHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Example of Expenses </b></p>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The example below is intended to help you compare the costs of investing in the Fund with the costs of investing in other mutual funds. The example assumes a $10,000 initial investment, 5% annual total return, and that fees and expenses remain the same as in the tables above. To the extent that the Manager is waiving fees or reimbursing expenses, the example assumes that such waiver or reimbursement will only be in place through the date noted above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming Redemption at End of Period </b></p>
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming No Redemption </b></p>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Portfolio Turnover </b></p>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

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 fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 5% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 5.00%
Strategy [Heading] rr_StrategyHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Strategies </b></p>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

Under normal circumstances, we invest:

  • at least 80% of the Fund's net assets in municipal securities whose interest is exempt from federal income tax, including federal alternative minimum tax (AMT), and North Carolina individual income tax;

  • up to 20% of the Fund's net assets in securities whose interest is subject to federal income tax, including federal AMT;

  • up to 10% of the Fund's total assets in below investment-grade municipal securities; and

  • up to 10% of the Fund's total assets in inverse floaters.

We invest principally in municipal securities whose interest is exempt from federal income tax, including federal AMT, and North Carolina individual income tax. Our investment holdings may include municipal securities issued by the state of North Carolina and its subdivisions, authorities, instrumentalities and corporations, as well as municipal securities issued by the territories and possessions of the United States. Some of the securities may be below investment-grade or may be unrated and deemed by us to be of comparable quality. We may also invest a portion of the Fund's net assets in securities whose interest is subject to federal income tax, including federal AMT. We may use futures for duration and yield curve management. While we may purchase securities of any maturity, under normal circumstances, we expect the Fund's dollar-weighted average effective maturity to be between 3 and 20 years.

We may invest up to 10% of the Fund's total assets in inverse floaters to seek enhanced returns. Inverse floaters are derivative debt instruments created by depositing a municipal security in a trust. Inverse floaters pay interest at rates that generally vary inversely with specified short-term interest rates and involve leverage. We intend to limit leverage created by the Fund's investment in inverse floaters to an amount equal to 10% of the Fund's total assets.

We use a combination of top-down and bottom-up research to cover the four main elements of total return: duration management, yield curve positioning, sector and credit quality allocation, and security selection. Our top-down analysis involves an evaluation of macroeconomic factors that may include, among others, the pace of economic growth, employment conditions, inflation, and monetary and fiscal policy. Our bottom-up analysis, which involves intensive research into the credit fundamentals of individual issuers and the relative value of individual issues, is used to uncover solid investment opportunities. Securities are selected based on several factors, including, among others, improving financial trends, positive industry and sector dynamics, improving economic conditions, and specific demographic trends. Securities may be sold based on relative value considerations and could be replaced with a security that presents a better value or risk/reward profile. A security may also be sold due to changes in credit characteristics or outlook, as well as changes in portfolio strategy or cash flow needs.

The Fund is considered to be non-diversified.
Risk [Heading] rr_RiskHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Risks </b></p>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency, and is primarily subject to the risks briefly summarized below.

Credit Risk. The issuer or guarantor of a debt security may be unable or perceived to be unable to pay interest or repay principal when they become due, which could cause the value of an investment to decline and a Fund to lose money.

Derivatives Risk. The use of derivatives, such as futures, options and swap agreements, can lead to losses, including those magnified by leverage, particularly when derivatives are used to enhance return rather than mitigate risk. Certain derivative instruments may be difficult to sell when the portfolio manager believes it would be appropriate to do so, or the other party to a derivative contract may be unwilling or unable to fulfill its contractual obligations.

Futures Contracts Risk. A Fund that uses futures contracts, which are a type of derivative, is subject to the risk of loss caused by unanticipated market movements. In addition, there may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes and there may at times not be a liquid secondary market for certain futures contracts.

High Yield Securities Risk. High yield securities and unrated securities of similar credit quality (commonly known as "junk bonds") have a much greater risk of default or of not returning principal and their values tend to be more volatile than higher-rated securities with similar maturities.

Interest Rate Risk. When interest rates rise, the value of debt securities tends to fall. When interest rates decline, interest that a Fund is able to earn on its investments in debt securities may also decline, but the value of those securities may increase.

Inverse Floater Risk. The holder of an inverse floater, which is a type of derivative, could lose more than its principal investment. An inverse floater produces less income and may decline in value when market rates and the rate payable on the floater rises. An inverse floater typically involves leverage, which may magnify a Fund's losses, and exhibits greater price and income volatility than an unleveraged bond with a similar maturity.

Management Risk. Investment decisions, techniques, analyses or models implemented by a Fund's manager or sub-adviser in seeking to achieve the Fund's investment objective may not produce the returns expected, may cause the Fund's shares to lose value or may cause the Fund to underperform other funds with similar investment objectives.

Market Risk. The values of, and/or the income generated by, securities held by a Fund may decline due to general market conditions or other factors, including those directly involving the issuers of such securities. Security markets are volatile and may decline significantly in response to adverse issuer, regulatory, political, or economic developments. Different sectors of the market and different security types may react differently to such developments.

Municipal Securities Risk. Municipal securities may be fully or partially backed or enhanced by the taxing authority of a local government, by the current or anticipated revenues from a specific project or specific assets, or by the credit of, or liquidity enhancement provided by, a private issuer. Various types of municipal securities are often related in such a way that political, economic or business developments affecting one obligation could affect other municipal securities held by a Fund.

Non-Diversification Risk. A Fund that is considered "non-diversified" under the 1940 Act is more vulnerable to market or economic events impacting issuers of individual portfolio securities than a "diversified" fund. Default by the issuer of an individual security in such a Fund's portfolio may have a greater negative effect on the Fund's return or net asset value than it would on the return or net asset value of a "diversified" fund.

State Emphasis Risk. Securities issued by a particular state and its subdivisions, authorities, instrumentalities and corporations are subject to the risk of unfavorable developments occurring in such state. Such developments may adversely impact the liquidity and value of the municipal securities in which a Fund invests and, in turn, adversely impact the value of the Fund's shares.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversification Risk. A Fund that is considered "non-diversified" under the 1940 Act is more vulnerable to market or economic events impacting issuers of individual portfolio securities than a "diversified" fund. Default by the issuer of an individual security in such a Fund's portfolio may have a greater negative effect on the Fund's return or net asset value than it would on the return or net asset value of a "diversified" fund.
Risk Lose Money [Text] rr_RiskLoseMoney An investment in the Fund may lose money
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Performance </b></p>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year. The Fund's average annual total returns are compared to the performance of one or more indices. Past performance before and after taxes is no guarantee of future results. Current month-end performance is available on the Fund's website at wellsfargofunds.com.
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Returns do not reflect sales charges and would be lower if they did
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Highest Quarter: 3rd Quarter 2009

+6.55%

Lowest Quarter: 4th Quarter 2010

-4.57%

Year-to-date total return as of 9/30/2018 is +0.10%
Performance Table Heading rr_PerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Average Annual Total Returns for the periods ended 12/31/2017 (returns reflect applicable sales charges) </b></p> [11]
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts. After-tax returns are shown for only one class of shares. After-tax returns for any other class will vary.
Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads returns reflect applicable sales charges
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance before and after taxes is no guarantee of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown for only one class of shares.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress wellsfargofunds.com
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo North Carolina Tax-Free Fund) | Bloomberg Barclays Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 5.45%
5 Years rr_AverageAnnualReturnYear05 3.02%
10 Years rr_AverageAnnualReturnYear10 4.46%
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo North Carolina Tax-Free Fund) | Bloomberg Barclays North Carolina Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 4.07%
5 Years rr_AverageAnnualReturnYear05 2.44%
10 Years rr_AverageAnnualReturnYear10 4.13%
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo North Carolina Tax-Free Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 4.50%
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [3]
Management Fees rr_ManagementFeesOverAssets 0.40%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.61%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.01%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets (0.16%)
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 0.85% [12]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 533
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 742
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 968
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,617
Bar Chart [Heading] rr_BarChartHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b>Calendar Year Total Returns for Class A as of 12/31 each year (Returns do not reflect sales charges and would be lower if they did)</b> </p> [11]
Annual Return 2008 rr_AnnualReturn2008 (6.23%)
Annual Return 2009 rr_AnnualReturn2009 12.56%
Annual Return 2010 rr_AnnualReturn2010 1.91%
Annual Return 2011 rr_AnnualReturn2011 9.54%
Annual Return 2012 rr_AnnualReturn2012 7.16%
Annual Return 2013 rr_AnnualReturn2013 (2.19%)
Annual Return 2014 rr_AnnualReturn2014 8.66%
Annual Return 2015 rr_AnnualReturn2015 2.91%
Annual Return 2016 rr_AnnualReturn2016 (0.59%)
Annual Return 2017 rr_AnnualReturn2017 3.61%
Year to Date Return, Label rr_YearToDateReturnLabel Year-to-date total return as of 9/30/2018 is +0.10%
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 0.10%
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2018
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter: 3rd Quarter 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 6.55%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2009
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter: 4th Quarter 2010
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (4.57%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2010
1 Year rr_AverageAnnualReturnYear01 (1.09%)
5 Years rr_AverageAnnualReturnYear05 1.48%
10 Years rr_AverageAnnualReturnYear10 3.12%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Jan. 11, 1993
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo North Carolina Tax-Free Fund) | Class A | (after taxes on distributions)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (1.09%)
5 Years rr_AverageAnnualReturnYear05 1.47%
10 Years rr_AverageAnnualReturnYear10 3.11%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Jan. 11, 1993
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo North Carolina Tax-Free Fund) | Class A | (after taxes on distributions and the sale of Fund Shares)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 0.59%
5 Years rr_AverageAnnualReturnYear05 1.81%
10 Years rr_AverageAnnualReturnYear10 3.16%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Jan. 11, 1993
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo North Carolina Tax-Free Fund) | Class C  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management Fees rr_ManagementFeesOverAssets 0.40%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.75%
Other Expenses rr_OtherExpensesOverAssets 0.61%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.76%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets (0.16%)
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 1.60% [12]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 263
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 539
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 939
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,060
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 163
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 539
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 939
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,060
1 Year rr_AverageAnnualReturnYear01 1.84%
5 Years rr_AverageAnnualReturnYear05 1.65%
10 Years rr_AverageAnnualReturnYear10 2.82%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Mar. 27, 2002
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Pennsylvania Tax-Free Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Investment Objective </b></p>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund seeks current income exempt from federal income tax and Pennsylvania individual income tax.
Expense [Heading] rr_ExpenseHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Fees and Expenses </b></p>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

These tables are intended to help you understand the various costs and expenses you will pay if you buy and hold shares of the Fund. 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 aggregate in specified classes of certain Wells Fargo Funds. More information about these and other discounts is available from your financial professional and in "Share Class Features" and "Reductions and Waivers of Sales Charges" on pages 84 and 86 of the Prospectus and "Additional Purchase and Redemption Information" on page 69 of the Statement of Additional Information. Investors who purchase through certain intermediaries may be subject to different sales charge discounts than those outlined shares in these sections. Please see Appendix A on page 110 for further information.
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts 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 aggregate in specified classes of certain Wells Fargo Funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Shareholder Fees (fees paid directly from your investment) </b></p>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) </b></p>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination October 31, 2019
Expenses Deferred Charges [Text Block] rr_ExpensesDeferredChargesTextBlock Investments of $1 million or more are not subject to a front-end sales charge but generally will be subject to a deferred sales charge of 1.00% if redeemed within 18 months from the date of purchase.
Expense Example [Heading] rr_ExpenseExampleHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Example of Expenses </b></p>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The example below is intended to help you compare the costs of investing in the Fund with the costs of investing in other mutual funds. The example assumes a $10,000 initial investment, 5% annual total return, and that fees and expenses remain the same as in the tables above. To the extent that the Manager is waiving fees or reimbursing expenses, the example assumes that such waiver or reimbursement will only be in place through the date noted above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming Redemption at End of Period </b></p>
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming No Redemption </b></p>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Portfolio Turnover </b></p>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

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 fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 10% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 10.00%
Strategy [Heading] rr_StrategyHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Strategies </b></p>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

Under normal circumstances, we invest:

  • at least 80% of the Fund's net assets in municipal securities whose interest is exempt from federal income tax, including federal alternative minimum tax (AMT), and Pennsylvania individual income tax;

  • up to 20% of the Fund's net assets in securities whose interest is subject to federal income tax, including federal AMT;

  • up to 10% of the Fund's total assets in below investment-grade municipal securities; and

  • up to 10% of the Fund's total assets in inverse floaters.

We invest principally in municipal securities whose interest is exempt from federal income tax, including federal AMT, and Pennsylvania individual income tax. Our investment holdings may include municipal securities issued by the Commonwealth of Pennsylvania and its subdivisions, authorities, instrumentalities and corporations, as well as municipal securities issued by the territories and possessions of the United States. Some of the securities may be below investment grade or may be unrated and deemed by us to be of comparable quality. We may also invest a portion of the Fund's net assets in securities whose interest is subject to federal income tax, including federal AMT. We may use futures for duration and yield curve management. While we may purchase securities of any maturity, under normal circumstances, we expect the Fund's dollar-weighted average effective maturity to be between 3 and 20 years.

We may invest up to 10% of the Fund's total assets in inverse floaters to seek enhanced returns. Inverse floaters are derivative debt instruments created by depositing a municipal security in a trust. Inverse floaters pay interest at rates that generally vary inversely with specified short-term interest rates and involve leverage. We intend to limit leverage created by the Fund's investment in inverse floaters to an amount equal to 10% of the Fund's total assets.

We use a combination of top-down and bottom-up research to cover the four main elements of total return: duration management, yield curve positioning, sector and credit quality allocation, and security selection. Our top-down analysis involves an evaluation of macroeconomic factors that may include, among others, the pace of economic growth, employment conditions, inflation, and monetary and fiscal policy. Our bottom-up analysis, which involves intensive research into the credit fundamentals of individual issuers and the relative value of individual issues, is used to uncover solid investment opportunities. Securities are selected based on several factors, including, among others, improving financial trends, positive industry and sector dynamics, improving economic conditions, and specific demographic trends. Securities may be sold based on relative value considerations and could be replaced with a security that presents a better value or risk/reward profile. A security may also be sold due to changes in credit characteristics or outlook, as well as changes in portfolio strategy or cash flow needs.
Risk [Heading] rr_RiskHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Risks </b></p>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency, and is primarily subject to the risks briefly summarized below.

Credit Risk. The issuer or guarantor of a debt security may be unable or perceived to be unable to pay interest or repay principal when they become due, which could cause the value of an investment to decline and a Fund to lose money.

Derivatives Risk. The use of derivatives, such as futures, options and swap agreements, can lead to losses, including those magnified by leverage, particularly when derivatives are used to enhance return rather than mitigate risk. Certain derivative instruments may be difficult to sell when the portfolio manager believes it would be appropriate to do so, or the other party to a derivative contract may be unwilling or unable to fulfill its contractual obligations.

Futures Contracts Risk. A Fund that uses futures contracts, which are a type of derivative, is subject to the risk of loss caused by unanticipated market movements. In addition, there may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes and there may at times not be a liquid secondary market for certain futures contracts.

High Yield Securities Risk. High yield securities and unrated securities of similar credit quality (commonly known as "junk bonds") have a much greater risk of default or of not returning principal and their values tend to be more volatile than higher-rated securities with similar maturities.

Interest Rate Risk. When interest rates rise, the value of debt securities tends to fall. When interest rates decline, interest that a Fund is able to earn on its investments in debt securities may also decline, but the value of those securities may increase.

Inverse Floater Risk. The holder of an inverse floater, which is a type of derivative, could lose more than its principal investment. An inverse floater produces less income and may decline in value when market rates and the rate payable on the floater rises. An inverse floater typically involves leverage, which may magnify a Fund's losses, and exhibits greater price and income volatility than an unleveraged bond with a similar maturity.

Management Risk. Investment decisions, techniques, analyses or models implemented by a Fund's manager or sub-adviser in seeking to achieve the Fund's investment objective may not produce the returns expected, may cause the Fund's shares to lose value or may cause the Fund to underperform other funds with similar investment objectives.

Market Risk. The values of, and/or the income generated by, securities held by a Fund may decline due to general market conditions or other factors, including those directly involving the issuers of such securities. Security markets are volatile and may decline significantly in response to adverse issuer, regulatory, political, or economic developments. Different sectors of the market and different security types may react differently to such developments.

Municipal Securities Risk. Municipal securities may be fully or partially backed or enhanced by the taxing authority of a local government, by the current or anticipated revenues from a specific project or specific assets, or by the credit of, or liquidity enhancement provided by, a private issuer. Various types of municipal securities are often related in such a way that political, economic or business developments affecting one obligation could affect other municipal securities held by a Fund.

State Emphasis Risk. Securities issued by a particular state and its subdivisions, authorities, instrumentalities and corporations are subject to the risk of unfavorable developments occurring in such state. Such developments may adversely impact the liquidity and value of the municipal securities in which a Fund invests and, in turn, adversely impact the value of the Fund's shares.
Risk Lose Money [Text] rr_RiskLoseMoney An investment in the Fund may lose money
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Performance </b></p>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year. The Fund's average annual total returns are compared to the performance of one or more indices. Past performance before and after taxes is no guarantee of future results. Current month-end performance is available on the Fund's website at wellsfargofunds.com.
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Returns do not reflect sales charges and would be lower if they did
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Highest Quarter: 3rd Quarter 2009

+9.17%

Lowest Quarter: 4th Quarter 2008

-4.89%

Year-to-date total return as of 9/30/2018 is -0.20%
Performance Table Heading rr_PerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Average Annual Total Returns for the periods ended 12/31/2017 (returns reflect applicable sales charges) </b></p> [13]
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts. After-tax returns are shown for only one class of shares. After-tax returns for any other class will vary.
Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads returns reflect applicable sales charges
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance before and after taxes is no guarantee of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown for only one class of shares.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress wellsfargofunds.com
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Pennsylvania Tax-Free Fund) | Bloomberg Barclays Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 5.45%
5 Years rr_AverageAnnualReturnYear05 3.02%
10 Years rr_AverageAnnualReturnYear10 4.46%
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Pennsylvania Tax-Free Fund) | Bloomberg Barclays Pennsylvania Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 6.02%
5 Years rr_AverageAnnualReturnYear05 3.31%
10 Years rr_AverageAnnualReturnYear10 4.65%
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Pennsylvania Tax-Free Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 4.50%
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [3]
Management Fees rr_ManagementFeesOverAssets 0.40%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.51%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.91%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets (0.17%)
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 0.74% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 522
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 711
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 915
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,504
Bar Chart [Heading] rr_BarChartHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b>Calendar Year Total Returns for Class A as of 12/31 each year (Returns do not reflect sales charges and would be lower if they did)</b> </p> [13]
Annual Return 2008 rr_AnnualReturn2008 (8.88%)
Annual Return 2009 rr_AnnualReturn2009 18.02%
Annual Return 2010 rr_AnnualReturn2010 2.71%
Annual Return 2011 rr_AnnualReturn2011 10.57%
Annual Return 2012 rr_AnnualReturn2012 8.22%
Annual Return 2013 rr_AnnualReturn2013 (2.06%)
Annual Return 2014 rr_AnnualReturn2014 10.17%
Annual Return 2015 rr_AnnualReturn2015 3.66%
Annual Return 2016 rr_AnnualReturn2016 (0.51%)
Annual Return 2017 rr_AnnualReturn2017 4.99%
Year to Date Return, Label rr_YearToDateReturnLabel Year-to-date total return as of 9/30/2018 is -0.20%
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (0.20%)
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2018
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter: 3rd Quarter 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 9.17%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2009
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter: 4th Quarter 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (4.89%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
1 Year rr_AverageAnnualReturnYear01 0.27%
5 Years rr_AverageAnnualReturnYear05 2.21%
10 Years rr_AverageAnnualReturnYear10 3.96%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Dec. 27, 1990
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Pennsylvania Tax-Free Fund) | Class A | (after taxes on distributions)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 0.27%
5 Years rr_AverageAnnualReturnYear05 2.21%
10 Years rr_AverageAnnualReturnYear10 3.95%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Dec. 27, 1990
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Pennsylvania Tax-Free Fund) | Class A | (after taxes on distributions and the sale of Fund Shares)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 1.49%
5 Years rr_AverageAnnualReturnYear05 2.46%
10 Years rr_AverageAnnualReturnYear10 3.91%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Dec. 27, 1990
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Pennsylvania Tax-Free Fund) | Class C  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management Fees rr_ManagementFeesOverAssets 0.40%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.75%
Other Expenses rr_OtherExpensesOverAssets 0.51%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.66%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets (0.17%)
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 1.49% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 252
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 507
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 886
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,951
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 152
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 507
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 886
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,951
1 Year rr_AverageAnnualReturnYear01 3.21%
5 Years rr_AverageAnnualReturnYear05 2.39%
10 Years rr_AverageAnnualReturnYear10 3.66%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Feb. 01, 1993
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Short-Term Municipal Bond Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Investment Objective </b></p>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund seeks current income exempt from federal income tax consistent with capital preservation.
Expense [Heading] rr_ExpenseHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Fees and Expenses </b></p>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

These tables are intended to help you understand the various costs and expenses you will pay if you buy and hold shares of the Fund. 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 aggregate in specified classes of certain Wells Fargo Funds. More information about these and other discounts is available from your financial professional and in "Share Class Features" and "Reductions and Waivers of Sales Charges" on pages 84 and 86 of the Prospectus and "Additional Purchase and Redemption Information" on page 69 of the Statement of Additional Information. Investors who purchase through certain intermediaries may be subject to different sales charge discounts than those outlined shares in these sections. Please see Appendix A on page 110 for further information.
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts 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 aggregate in specified classes of certain Wells Fargo Funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Shareholder Fees (fees paid directly from your investment) </b></p>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) </b></p>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination October 31, 2019
Expenses Deferred Charges [Text Block] rr_ExpensesDeferredChargesTextBlock Investments of $250,000 or more are not subject to a front-end sales charge but generally will be subject to a deferred sales charge of 0.40% if redeemed within 12 months from the date of purchase.
Expense Example [Heading] rr_ExpenseExampleHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Example of Expenses </b></p>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The example below is intended to help you compare the costs of investing in the Fund with the costs of investing in other mutual funds. The example assumes a $10,000 initial investment, 5% annual total return, and that fees and expenses remain the same as in the tables above. To the extent that the Manager is waiving fees or reimbursing expenses, the example assumes that such waiver or reimbursement will only be in place through the date noted above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming Redemption at End of Period </b></p>
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming No Redemption </b></p>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Portfolio Turnover </b></p>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

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 fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 31% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 31.00%
Strategy [Heading] rr_StrategyHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Strategies </b></p>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

Under normal circumstances, we invest:

  • at least 80% of the Fund's net assets in municipal securities whose interest is exempt from federal income tax, but not necessarily federal alternative minimum tax (AMT);

  • up to 20% of the Fund's total assets in securities whose interest is subject to federal AMT;

  • up to 15% of the Fund's total assets in below investment-grade municipal securities; and

  • up to 10% of the Fund's total assets in inverse floaters.

We invest principally in short-term municipal securities of states, territories and possessions of the United States whose interest is exempt from federal income tax, but not necessarily federal AMT. Some of the securities may be below investment grade or may be unrated and deemed by us to be of comparable quality. We may also invest a portion of the Fund's assets in securities whose interest is subject to federal AMT. We may use futures for duration and yield curve management. While we may purchase securities of any maturity, under normal circumstances, we expect the Fund's dollar-weighted average effective maturity to be 3 years or less.

We may invest up to 10% of the Fund's total assets in inverse floaters to seek enhanced returns. Inverse floaters are derivative debt instruments created by depositing a municipal security in a trust. Inverse floaters pay interest at rates that generally vary inversely with specified short-term interest rates and involve leverage. We intend to limit leverage created by the Fund's investment in inverse floaters to an amount equal to 10% of the Fund's total assets.

We use a combination of top-down and bottom-up research to cover the four main elements of total return: duration management, yield curve positioning, sector and credit quality allocation, and security selection. Our top-down analysis involves an evaluation of macroeconomic factors that may include, among others, the pace of economic growth, employment conditions, inflation, and monetary and fiscal policy. Our bottom-up analysis, which involves intensive research into the credit fundamentals of individual issuers and the relative value of individual issues, is used to uncover solid investment opportunities. Securities are selected based on several factors, including, among others, improving financial trends, positive industry and sector dynamics, improving economic conditions, and specific demographic trends. Securities may be sold based on relative value considerations and could be replaced with a security that presents a better value or risk/reward profile. A security may also be sold due to changes in credit characteristics or outlook, as well as changes in portfolio strategy or cash flow needs.
Risk [Heading] rr_RiskHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Risks </b></p>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency, and is primarily subject to the risks briefly summarized below.

Credit Risk. The issuer or guarantor of a debt security may be unable or perceived to be unable to pay interest or repay principal when they become due, which could cause the value of an investment to decline and a Fund to lose money.

Derivatives Risk. The use of derivatives, such as futures, options and swap agreements, can lead to losses, including those magnified by leverage, particularly when derivatives are used to enhance return rather than mitigate risk. Certain derivative instruments may be difficult to sell when the portfolio manager believes it would be appropriate to do so, or the other party to a derivative contract may be unwilling or unable to fulfill its contractual obligations.

Futures Contracts Risk. A Fund that uses futures contracts, which are a type of derivative, is subject to the risk of loss caused by unanticipated market movements. In addition, there may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes and there may at times not be a liquid secondary market for certain futures contracts.

High Yield Securities Risk. High yield securities and unrated securities of similar credit quality (commonly known as "junk bonds") have a much greater risk of default or of not returning principal and their values tend to be more volatile than higher-rated securities with similar maturities.

Interest Rate Risk. When interest rates rise, the value of debt securities tends to fall. When interest rates decline, interest that a Fund is able to earn on its investments in debt securities may also decline, but the value of those securities may increase.

Inverse Floater Risk. The holder of an inverse floater, which is a type of derivative, could lose more than its principal investment. An inverse floater produces less income and may decline in value when market rates and the rate payable on the floater rises. An inverse floater typically involves leverage, which may magnify a Fund's losses, and exhibits greater price and income volatility than an unleveraged bond with a similar maturity.

Management Risk. Investment decisions, techniques, analyses or models implemented by a Fund's manager or sub-adviser in seeking to achieve the Fund's investment objective may not produce the returns expected, may cause the Fund's shares to lose value or may cause the Fund to underperform other funds with similar investment objectives.

Market Risk. The values of, and/or the income generated by, securities held by a Fund may decline due to general market conditions or other factors, including those directly involving the issuers of such securities. Security markets are volatile and may decline significantly in response to adverse issuer, regulatory, political, or economic developments. Different sectors of the market and different security types may react differently to such developments.

Municipal Securities Risk. Municipal securities may be fully or partially backed or enhanced by the taxing authority of a local government, by the current or anticipated revenues from a specific project or specific assets, or by the credit of, or liquidity enhancement provided by, a private issuer. Various types of municipal securities are often related in such a way that political, economic or business developments affecting one obligation could affect other municipal securities held by a Fund.
Risk Lose Money [Text] rr_RiskLoseMoney An investment in the Fund may lose money
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Performance </b></p>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year. The Fund's average annual total returns are compared to the performance of one or more indices. Past performance before and after taxes is no guarantee of future results. Current month-end performance is available on the Fund's website at wellsfargofunds.com.
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Returns do not reflect sales charges and would be lower if they did
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Highest Quarter: 1st Quarter 2009

+3.15%

Lowest Quarter: 4th Quarter 2008

-2.25%

Year-to-date total return as of 9/30/2018 is +0.14%
Performance Table Heading rr_PerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Average Annual Total Returns for the periods ended 12/31/2017 (returns reflect applicable sales charges) </b></p> [14]
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts. After-tax returns are shown for only one class of shares. After-tax returns for any other class will vary.
Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads returns reflect applicable sales charges
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance before and after taxes is no guarantee of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown for only one class of shares.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress wellsfargofunds.com
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Short-Term Municipal Bond Fund) | Bloomberg Barclays 1-3 Year Composite Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 1.24%
5 Years rr_AverageAnnualReturnYear05 0.86%
10 Years rr_AverageAnnualReturnYear10 1.92%
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Short-Term Municipal Bond Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 2.00%
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [1]
Management Fees rr_ManagementFeesOverAssets 0.33%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.44%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.77%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets (0.14%)
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 0.63% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 263
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 427
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 606
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,122
1 Year rr_AverageAnnualReturnYear01 (0.33%)
5 Years rr_AverageAnnualReturnYear05 0.44%
10 Years rr_AverageAnnualReturnYear10 1.91%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Jul. 18, 2008
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Short-Term Municipal Bond Fund) | Class C  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management Fees rr_ManagementFeesOverAssets 0.33%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.75%
Other Expenses rr_OtherExpensesOverAssets 0.44%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.52%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets (0.14%)
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 1.38% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 241
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 467
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 816
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,801
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 141
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 467
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 816
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,801
Bar Chart [Heading] rr_BarChartHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b>Calendar Year Total Returns for Class C as of 12/31 each year (Returns do not reflect sales charges and would be lower if they did)</b> </p> [14]
Annual Return 2008 rr_AnnualReturn2008 (2.19%)
Annual Return 2009 rr_AnnualReturn2009 9.66%
Annual Return 2010 rr_AnnualReturn2010 1.87%
Annual Return 2011 rr_AnnualReturn2011 2.47%
Annual Return 2012 rr_AnnualReturn2012 1.55%
Annual Return 2013 rr_AnnualReturn2013 (0.05%)
Annual Return 2014 rr_AnnualReturn2014 0.80%
Annual Return 2015 rr_AnnualReturn2015 (0.21%)
Annual Return 2016 rr_AnnualReturn2016 (1.00%)
Annual Return 2017 rr_AnnualReturn2017 0.95%
Year to Date Return, Label rr_YearToDateReturnLabel Year-to-date total return as of 9/30/2018 is +0.14%
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 0.14%
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2018
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter: 1st Quarter 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 3.15%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2009
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter: 4th Quarter 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (2.25%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
1 Year rr_AverageAnnualReturnYear01 (0.05%)
5 Years rr_AverageAnnualReturnYear05 0.10%
10 Years rr_AverageAnnualReturnYear10 1.34%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Jan. 31, 2003
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Short-Term Municipal Bond Fund) | Class C | (after taxes on distributions)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (0.05%)
5 Years rr_AverageAnnualReturnYear05 0.08%
10 Years rr_AverageAnnualReturnYear10 1.31%
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Short-Term Municipal Bond Fund) | Class C | (after taxes on distributions and the sale of Fund Shares)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 0.20%
5 Years rr_AverageAnnualReturnYear05 0.15%
10 Years rr_AverageAnnualReturnYear10 1.30%
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Strategic Municipal Bond Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Investment Objective </b></p>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund seeks current income exempt from regular federal income tax.
Expense [Heading] rr_ExpenseHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Fees and Expenses </b></p>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

These tables are intended to help you understand the various costs and expenses you will pay if you buy and hold shares of the Fund. 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 aggregate in specified classes of certain Wells Fargo Funds. More information about these and other discounts is available from your financial professional and in "Share Class Features" and "Reductions and Waivers of Sales Charges" on pages 84 and 86 of the Prospectus and "Additional Purchase and Redemption Information" on page 69 of the Statement of Additional Information. Investors who purchase through certain intermediaries may be subject to different sales charge discounts than those outlined shares in these sections. Please see Appendix A on page 110 for further information.
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts 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 aggregate in specified classes of certain Wells Fargo Funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Shareholder Fees (Fees paid directly from your investment) </b></p>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) </b></p>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination October 31, 2019
Expenses Deferred Charges [Text Block] rr_ExpensesDeferredChargesTextBlock Investments of $1 million or more are not subject to a front-end sales charge but generally will be subject to a deferred sales charge of 1.00% if redeemed within 18 months from the date of purchase.
Expense Example [Heading] rr_ExpenseExampleHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Example of Expenses </b></p>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The example below is intended to help you compare the costs of investing in the Fund with the costs of investing in other mutual funds. The example assumes a $10,000 initial investment, 5% annual total return, and that fees and expenses remain the same as in the tables above. To the extent that the Manager is waiving fees or reimbursing expenses, the example assumes that such waiver or reimbursement will only be in place through the date noted above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming Redemption at End of Period </b></p>
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming No Redemption </b></p>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Portfolio Turnover </b></p>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

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 fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 33% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 33.00%
Strategy [Heading] rr_StrategyHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Strategies </b></p>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

Under normal circumstances, we invest:

  • at least 80% of the Fund's net assets in municipal securities whose interest is exempt from regular federal income tax, but not necessarily the federal alternative minimum tax (AMT);

  • up to 35% of the Fund's total assets in below investment-grade municipal securities; and

  • up to 10% of the Fund's total assets in inverse floaters.

We may also invest:

  • any amount in securities whose interest is subject to federal AMT.

We invest principally in municipal securities of states, territories and possessions of the United States whose interest is exempt from regular federal income tax, but not necessarily federal AMT. Some of the securities may be below investment grade or may be unrated and deemed by us to be of comparable quality. We may also invest any amount of the Fund's total assets in securities whose interest is subject to federal AMT. We may use futures for duration and yield curve management.

We may invest up to 10% of the Fund's total assets in inverse floaters to seek enhanced returns. Inverse floaters are derivative debt instruments created by depositing a municipal security in a trust. Inverse floaters pay interest at rates that generally vary inversely with specified short-term interest rates and involve leverage. We intend to limit leverage created by the Fund's investment in inverse floaters to an amount equal to 10% of the Fund's total assets.

We use a combination of top-down and bottom-up research to cover the four main elements of total return: duration management, yield curve positioning, sector and credit quality allocation, and security selection. Our top-down analysis involves an evaluation of macroeconomic factors that may include, among others, the pace of economic growth, employment conditions, inflation, and monetary and fiscal policy. Our bottom-up analysis, which involves intensive research into the credit fundamentals of individual issuers and the relative value of individual issues, is used to uncover solid investment opportunities. Securities are selected based on several factors, including, among others, improving financial trends, positive industry and sector dynamics, improving economic conditions, and specific demographic trends. Securities may be sold based on relative value considerations and could be replaced with a security that presents a better value or risk/reward profile. A security may also be sold due to changes in credit characteristics or outlook, as well as changes in portfolio strategy or cash flow needs.

While we may purchase securities of any maturity or duration, under normal circumstances, we expect the Fund's overall dollar-weighted average effective duration to be 6 years or less.
Risk [Heading] rr_RiskHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Risks </b></p>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency, and is primarily subject to the risks briefly summarized below.

Credit Risk. The issuer or guarantor of a debt security may be unable or perceived to be unable to pay interest or repay principal when they become due, which could cause the value of an investment to decline and a Fund to lose money.

Derivatives Risk. The use of derivatives, such as futures, options and swap agreements, can lead to losses, including those magnified by leverage, particularly when derivatives are used to enhance return rather than mitigate risk. Certain derivative instruments may be difficult to sell when the portfolio manager believes it would be appropriate to do so, or the other party to a derivative contract may be unwilling or unable to fulfill its contractual obligations.

Futures Contracts Risk. A Fund that uses futures contracts, which are a type of derivative, is subject to the risk of loss caused by unanticipated market movements. In addition, there may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes and there may at times not be a liquid secondary market for certain futures contracts.

High Yield Securities Risk. High yield securities and unrated securities of similar credit quality (commonly known as "junk bonds") have a much greater risk of default or of not returning principal and their values tend to be more volatile than higher-rated securities with similar maturities.

Interest Rate Risk. When interest rates rise, the value of debt securities tends to fall. When interest rates decline, interest that a Fund is able to earn on its investments in debt securities may also decline, but the value of those securities may increase.

Inverse Floater Risk. The holder of an inverse floater, which is a type of derivative, could lose more than its principal investment. An inverse floater produces less income and may decline in value when market rates and the rate payable on the floater rises. An inverse floater typically involves leverage, which may magnify a Fund's losses, and exhibits greater price and income volatility than an unleveraged bond with a similar maturity.

Management Risk. Investment decisions, techniques, analyses or models implemented by a Fund's manager or sub-adviser in seeking to achieve the Fund's investment objective may not produce the returns expected, may cause the Fund's shares to lose value or may cause the Fund to underperform other funds with similar investment objectives.

Market Risk. The values of, and/or the income generated by, securities held by a Fund may decline due to general market conditions or other factors, including those directly involving the issuers of such securities. Security markets are volatile and may decline significantly in response to adverse issuer, regulatory, political, or economic developments. Different sectors of the market and different security types may react differently to such developments.

Municipal Securities Risk. Municipal securities may be fully or partially backed or enhanced by the taxing authority of a local government, by the current or anticipated revenues from a specific project or specific assets, or by the credit of, or liquidity enhancement provided by, a private issuer. Various types of municipal securities are often related in such a way that political, economic or business developments affecting one obligation could affect other municipal securities held by a Fund.
Risk Lose Money [Text] rr_RiskLoseMoney An investment in the Fund may lose money
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Performance </b></p>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year. The Fund's average annual total returns are compared to the performance of one or more indices. Past performance before and after taxes is no guarantee of future results. Current month-end performance is available on the Fund's website at wellsfargofunds.com.
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Returns do not reflect sales charges and would be lower if they did
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Highest Quarter: 1st Quarter 2009

+2.42%

Lowest Quarter: 4th Quarter 2016

-1.60%

Year-to-date total return as of 9/30/2018 is +0.82%
Performance Table Heading rr_PerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Average Annual Total Returns for the periods ended 12/31/2017 (returns reflect applicable sales charges) </b></p> [15]
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts. After-tax returns are shown for only one class of shares. After-tax returns for any other class will vary.
Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads returns reflect applicable sales charges
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance before and after taxes is no guarantee of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown for only one class of shares.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress wellsfargofunds.com
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Strategic Municipal Bond Fund) | Bloomberg Barclays Short-Intermediate Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 3.03%
5 Years rr_AverageAnnualReturnYear05 1.78%
10 Years rr_AverageAnnualReturnYear10 3.30%
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Strategic Municipal Bond Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 4.00%
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [16]
Management Fees rr_ManagementFeesOverAssets 0.37%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.45%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.82%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets none
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 0.82% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 480
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 651
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 837
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,373
Bar Chart [Heading] rr_BarChartHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b>Calendar Year Total Returns for Class A as of 12/31 each year (Returns do not reflect sales charges and would be lower if they did)</b> </p> [15]
Annual Return 2008 rr_AnnualReturn2008 (0.39%)
Annual Return 2009 rr_AnnualReturn2009 6.92%
Annual Return 2010 rr_AnnualReturn2010 2.36%
Annual Return 2011 rr_AnnualReturn2011 5.10%
Annual Return 2012 rr_AnnualReturn2012 4.33%
Annual Return 2013 rr_AnnualReturn2013 0.60%
Annual Return 2014 rr_AnnualReturn2014 4.55%
Annual Return 2015 rr_AnnualReturn2015 1.53%
Annual Return 2016 rr_AnnualReturn2016 0.36%
Annual Return 2017 rr_AnnualReturn2017 3.14%
Year to Date Return, Label rr_YearToDateReturnLabel Year-to-date total return as of 9/30/2018 is +0.82%
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 0.82%
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2018
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter: 1st Quarter 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 2.42%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2009
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter: 4th Quarter 2016
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (1.60%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2016
1 Year rr_AverageAnnualReturnYear01 (1.00%)
5 Years rr_AverageAnnualReturnYear05 1.20%
10 Years rr_AverageAnnualReturnYear10 2.41%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Dec. 01, 1994
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Strategic Municipal Bond Fund) | Class A | (after taxes on distributions)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (1.10%)
5 Years rr_AverageAnnualReturnYear05 0.99%
10 Years rr_AverageAnnualReturnYear10 2.27%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Dec. 01, 1994
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Strategic Municipal Bond Fund) | Class A | (after taxes on distributions and the sale of Fund Shares)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 0.13%
5 Years rr_AverageAnnualReturnYear05 1.17%
10 Years rr_AverageAnnualReturnYear10 2.30%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Dec. 01, 1994
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Strategic Municipal Bond Fund) | Class C  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management Fees rr_ManagementFeesOverAssets 0.37%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.75%
Other Expenses rr_OtherExpensesOverAssets 0.45%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.57%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets none
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 1.57% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 260
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 496
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 855
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,867
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 160
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 496
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 855
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,867
1 Year rr_AverageAnnualReturnYear01 1.37%
5 Years rr_AverageAnnualReturnYear05 1.26%
10 Years rr_AverageAnnualReturnYear10 2.06%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Aug. 18, 1997
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Ultra Short-Term Municipal Income Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Investment Objective </b></p>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund seeks current income exempt from federal income tax, consistent with capital preservation.
Expense [Heading] rr_ExpenseHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Fees and Expenses </b></p>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

These tables are intended to help you understand the various costs and expenses you will pay if you buy and hold shares of the Fund. 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 aggregate in specified classes of certain Wells Fargo Funds. More information about these and other discounts is available from your financial professional and in "Share Class Features" and "Reductions and Waivers of Sales Charges" on pages 84 and 86 of the Prospectus and "Additional Purchase and Redemption Information" on page 69 of the Statement of Additional Information. Investors who purchase through certain intermediaries may be subject to different sales charge discounts than those outlined shares in these sections. Please see Appendix A on page 110 for further information.
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts 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 aggregate in specified classes of certain Wells Fargo Funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Shareholder Fees (fees paid directly from your investment) </b></p>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) </b></p>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination October 31, 2019
Expenses Deferred Charges [Text Block] rr_ExpensesDeferredChargesTextBlock Investments of $250,000 or more are not subject to a front-end sales charge but generally will be subject to a deferred sales charge of 0.40% if redeemed within 12 months from the date of purchase.
Expense Example [Heading] rr_ExpenseExampleHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Example of Expenses </b></p>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The example below is intended to help you compare the costs of investing in the Fund with the costs of investing in other mutual funds. The example assumes a $10,000 initial investment, 5% annual total return, and that fees and expenses remain the same as in the tables above. To the extent that the Manager is waiving fees or reimbursing expenses, the example assumes that such waiver or reimbursement will only be in place through the date noted above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming Redemption at End of Period </b></p>
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming No Redemption </b></p>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Portfolio Turnover </b></p>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

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 fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 50% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 50.00%
Strategy [Heading] rr_StrategyHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Strategies </b></p>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

Under normal circumstances, we invest:

  • at least 80% of the Fund's net assets in municipal securities whose interest is exempt from federal income tax, but not necessarily federal alternative minimum tax (AMT);

  • up to 20% of the Fund's total assets in securities whose interest is subject to federal AMT; and

  • up to 10% of the Fund's total assets in below investment-grade municipal securities.

We invest principally in short-term municipal securities of states, territories and possessions of the United States whose interest is exempt from federal income tax, but not necessarily federal AMT. Some of the securities may be below investment grade or may be unrated and deemed by us to be of comparable quality. We may also invest a portion of the Fund's assets in securities whose interest is subject to federal AMT. We may use futures for duration and yield curve management. While we may purchase securities of any maturity, under normal circumstances, we expect the Fund's dollar-weighted average effective maturity to be 1 year or less.

We use a combination of top-down and bottom-up research to cover the four main elements of total return: duration management, yield curve positioning, sector and credit quality allocation, and security selection. Our top-down analysis involves an evaluation of macroeconomic factors that may include, among others, the pace of economic growth, employment conditions, inflation, and monetary and fiscal policy. Our bottom-up analysis, which involves intensive research into the credit fundamentals of individual issuers and the relative value of individual issues, is used to uncover solid investment opportunities. Securities are selected based on several factors, including, among others, improving financial trends, positive industry and sector dynamics, improving economic conditions, and specific demographic trends. Securities may be sold based on relative value considerations and could be replaced with a security that presents a better value or risk/reward profile. A security may also be sold due to changes in credit characteristics or outlook, as well as changes in portfolio strategy or cash flow needs.
Risk [Heading] rr_RiskHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Risks </b></p>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency, and is primarily subject to the risks briefly summarized below.

Credit Risk. The issuer or guarantor of a debt security may be unable or perceived to be unable to pay interest or repay principal when they become due, which could cause the value of an investment to decline and a Fund to lose money.

Derivatives Risk. The use of derivatives, such as futures, options and swap agreements, can lead to losses, including those magnified by leverage, particularly when derivatives are used to enhance return rather than mitigate risk. Certain derivative instruments may be difficult to sell when the portfolio manager believes it would be appropriate to do so, or the other party to a derivative contract may be unwilling or unable to fulfill its contractual obligations.

Futures Contracts Risk. A Fund that uses futures contracts, which are a type of derivative, is subject to the risk of loss caused by unanticipated market movements. In addition, there may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes and there may at times not be a liquid secondary market for certain futures contracts.

High Yield Securities Risk. High yield securities and unrated securities of similar credit quality (commonly known as "junk bonds") have a much greater risk of default or of not returning principal and their values tend to be more volatile than higher-rated securities with similar maturities.

Interest Rate Risk. When interest rates rise, the value of debt securities tends to fall. When interest rates decline, interest that a Fund is able to earn on its investments in debt securities may also decline, but the value of those securities may increase.

Management Risk. Investment decisions, techniques, analyses or models implemented by a Fund's manager or sub-adviser in seeking to achieve the Fund's investment objective may not produce the returns expected, may cause the Fund's shares to lose value or may cause the Fund to underperform other funds with similar investment objectives.

Market Risk. The values of, and/or the income generated by, securities held by a Fund may decline due to general market conditions or other factors, including those directly involving the issuers of such securities. Security markets are volatile and may decline significantly in response to adverse issuer, regulatory, political, or economic developments. Different sectors of the market and different security types may react differently to such developments.

Municipal Securities Risk. Municipal securities may be fully or partially backed or enhanced by the taxing authority of a local government, by the current or anticipated revenues from a specific project or specific assets, or by the credit of, or liquidity enhancement provided by, a private issuer. Various types of municipal securities are often related in such a way that political, economic or business developments affecting one obligation could affect other municipal securities held by a Fund.
Risk Lose Money [Text] rr_RiskLoseMoney An investment in the Fund may lose money
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Performance </b></p>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year. The Fund's average annual total returns are compared to the performance of one or more indices. Past performance before and after taxes is no guarantee of future results. Current month-end performance is available on the Fund's website at wellsfargofunds.com.
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Returns do not reflect sales charges and would be lower if they did
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Highest Quarter: 1st Quarter 2009

+2.36%

Lowest Quarter: 4th Quarter 2016

-0.49%

Year-to-date total return as of 9/30/2018 is +0.70%
Performance Table Heading rr_PerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Average Annual Total Returns for the periods ended 12/31/2017 (returns reflect applicable sales charges) </b></p> [17]
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts. After-tax returns are shown for only one class of shares. After-tax returns for any other class will vary.
Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads returns reflect applicable sales charges
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance before and after taxes is no guarantee of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown for only one class of shares.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress wellsfargofunds.com
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Ultra Short-Term Municipal Income Fund) | Ultra Short-Term Municipal Income Blended Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 0.75%
5 Years rr_AverageAnnualReturnYear05 0.41%
10 Years rr_AverageAnnualReturnYear10 0.90%
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Ultra Short-Term Municipal Income Fund) | Bloomberg Barclays 1-Year Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 0.92%
5 Years rr_AverageAnnualReturnYear05 0.64%
10 Years rr_AverageAnnualReturnYear10 1.48%
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Ultra Short-Term Municipal Income Fund) | iMoneyNet Tax-Free National Institutional Money Market Funds Average (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 0.58%
5 Years rr_AverageAnnualReturnYear05 0.17%
10 Years rr_AverageAnnualReturnYear10 0.32%
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Ultra Short-Term Municipal Income Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 2.00%
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [1]
Management Fees rr_ManagementFeesOverAssets 0.33%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.44%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.77%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets (0.10%)
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 0.67% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 267
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 431
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 610
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,126
Bar Chart [Heading] rr_BarChartHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b>Calendar Year Total Returns for Class A as of 12/31 each year (Returns do not reflect sales charges and would be lower if they did)</b> </p> [17]
Annual Return 2008 rr_AnnualReturn2008 2.55%
Annual Return 2009 rr_AnnualReturn2009 5.80%
Annual Return 2010 rr_AnnualReturn2010 1.20%
Annual Return 2011 rr_AnnualReturn2011 1.29%
Annual Return 2012 rr_AnnualReturn2012 0.73%
Annual Return 2013 rr_AnnualReturn2013 0.31%
Annual Return 2014 rr_AnnualReturn2014 0.28%
Annual Return 2015 rr_AnnualReturn2015 0.11%
Annual Return 2016 rr_AnnualReturn2016 (0.26%)
Annual Return 2017 rr_AnnualReturn2017 0.89%
Year to Date Return, Label rr_YearToDateReturnLabel Year-to-date total return as of 9/30/2018 is +0.70%
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 0.70%
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2018
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter: 1st Quarter 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 2.36%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2009
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter: 4th Quarter 2016
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (0.49%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2016
1 Year rr_AverageAnnualReturnYear01 (1.13%)
5 Years rr_AverageAnnualReturnYear05 (0.14%)
10 Years rr_AverageAnnualReturnYear10 1.07%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Oct. 02, 2000
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Ultra Short-Term Municipal Income Fund) | Class A | (after taxes on distributions)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (1.13%)
5 Years rr_AverageAnnualReturnYear05 (0.15%)
10 Years rr_AverageAnnualReturnYear10 1.06%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Oct. 02, 2000
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Ultra Short-Term Municipal Income Fund) | Class A | (after taxes on distributions and the sale of Fund Shares)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (0.35%)
5 Years rr_AverageAnnualReturnYear05 (0.02%)
10 Years rr_AverageAnnualReturnYear10 1.10%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Oct. 02, 2000
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Ultra Short-Term Municipal Income Fund) | Class C  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management Fees rr_ManagementFeesOverAssets 0.33%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.75%
Other Expenses rr_OtherExpensesOverAssets 0.44%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.52%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets (0.10%)
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 1.42% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 245
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 470
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 819
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,804
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 145
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 470
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 819
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,804
1 Year rr_AverageAnnualReturnYear01 (0.99%)
5 Years rr_AverageAnnualReturnYear05 (0.51%)
10 Years rr_AverageAnnualReturnYear10 0.52%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Mar. 31, 2008
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Wisconsin Tax-Free Fund)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Investment Objective </b></p>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund seeks current income exempt from federal income tax and Wisconsin individual income tax.
Expense [Heading] rr_ExpenseHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Fees and Expenses </b></p>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

These tables are intended to help you understand the various costs and expenses you will pay if you buy and hold shares of the Fund. 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 aggregate in specified classes of certain Wells Fargo Funds. More information about these and other discounts is available from your financial professional and in "Share Class Features" and "Reductions and Waivers of Sales Charges" on pages 84 and 86 of the Prospectus and "Additional Purchase and Redemption Information" on page 69 of the Statement of Additional Information. Investors who purchase through certain intermediaries may be subject to different sales charge discounts than those outlined shares in these sections. Please see Appendix A on page 110 for further information.
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts 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 aggregate in specified classes of certain Wells Fargo Funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Shareholder Fees (fees paid directly from your investment) </b></p>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) </b></p>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination October 31, 2019
Expenses Deferred Charges [Text Block] rr_ExpensesDeferredChargesTextBlock Investments of $1 million or more are not subject to a front-end sales charge but generally will be subject to a deferred sales charge of 1.00% if redeemed within 18 months from the date of purchase.
Expense Example [Heading] rr_ExpenseExampleHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Example of Expenses </b></p>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The example below is intended to help you compare the costs of investing in the Fund with the costs of investing in other mutual funds. The example assumes a $10,000 initial investment, 5% annual total return, and that fees and expenses remain the same as in the tables above. To the extent that the Manager is waiving fees or reimbursing expenses, the example assumes that such waiver or reimbursement will only be in place through the date noted above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming Redemption at End of Period </b></p>
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Assuming No Redemption </b></p>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Portfolio Turnover </b></p>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

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 fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 11% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 11.00%
Strategy [Heading] rr_StrategyHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Strategies </b></p>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

Under normal circumstances, we invest:

  • at least 80% of the Fund's net assets in municipal securities whose interest is exempt from federal income tax, including federal alternative minimum tax (AMT), and Wisconsin individual income tax;

  • up to 20% of the Fund's net assets in securities whose interest is subject to federal income tax, including federal AMT;

  • up to 10% of the Fund's total assets in below investment-grade municipal securities; and

  • up to 10% of the Fund's total assets in inverse floaters.

We invest principally in municipal securities whose interest is exempt from federal income tax, including federal AMT, and Wisconsin individual income tax. Our investment holdings may include municipal securities issued by the state of Wisconsin and its subdivisions, authorities, instrumentalities and corporations, as well as municipal securities issued by the territories and possessions of the United States or any other state that would be exempt from Wisconsin taxes. The Fund may invest in debt obligations issued by Puerto Rico. As part of our investment strategy, we may purchase appropriation bonds including municipal leases. Some of the securities may be below investment grade or may be unrated and deemed by us to be of comparable quality. We may also invest a portion of the Fund's net assets in securities whose interest is subject to federal income tax, including federal AMT. We may use futures for duration and yield curve management. While we may purchase securities of any maturity, under normal circumstances, we expect the Fund's dollar-weighted average effective maturity to be between 3 and 20 years.

We may invest up to 10% of the Fund's total assets in inverse floaters to seek enhanced returns. Inverse floaters are derivative debt instruments created by depositing a municipal security in a trust. Inverse floaters pay interest at rates that generally vary inversely with specified short-term interest rates and involve leverage. We intend to limit leverage created by the Fund's investment in inverse floaters to an amount equal to 10% of the Fund's total assets.

We use a combination of top-down and bottom-up research to cover the four main elements of total return: duration management, yield curve positioning, sector and credit quality allocation, and security selection. Our top-down analysis involves an evaluation of macroeconomic factors that may include, among others, the pace of economic growth, employment conditions, inflation, and monetary and fiscal policy. Our bottom-up analysis, which involves intensive research into the credit fundamentals of individual issuers and the relative value of individual issues, is used to uncover solid investment opportunities. Securities are selected based on several factors, including, among others, improving financial trends, positive industry and sector dynamics, improving economic conditions, and specific demographic trends. Securities may be sold based on relative value considerations and could be replaced with a security that presents a better value or risk/reward profile. A security may also be sold due to changes in credit characteristics or outlook, as well as changes in portfolio strategy or cash flow needs.

The Fund is considered to be non-diversified.
Risk [Heading] rr_RiskHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Risks </b></p>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency, and is primarily subject to the risks briefly summarized below.

Credit Risk. The issuer or guarantor of a debt security may be unable or perceived to be unable to pay interest or repay principal when they become due, which could cause the value of an investment to decline and a Fund to lose money.

Derivatives Risk. The use of derivatives, such as futures, options and swap agreements, can lead to losses, including those magnified by leverage, particularly when derivatives are used to enhance return rather than mitigate risk. Certain derivative instruments may be difficult to sell when the portfolio manager believes it would be appropriate to do so, or the other party to a derivative contract may be unwilling or unable to fulfill its contractual obligations.

Futures Contracts Risk. A Fund that uses futures contracts, which are a type of derivative, is subject to the risk of loss caused by unanticipated market movements. In addition, there may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes and there may at times not be a liquid secondary market for certain futures contracts.

High Yield Securities Risk. High yield securities and unrated securities of similar credit quality (commonly known as "junk bonds") have a much greater risk of default or of not returning principal and their values tend to be more volatile than higher-rated securities with similar maturities.

Interest Rate Risk. When interest rates rise, the value of debt securities tends to fall. When interest rates decline, interest that a Fund is able to earn on its investments in debt securities may also decline, but the value of those securities may increase.

Inverse Floater Risk. The holder of an inverse floater, which is a type of derivative, could lose more than its principal investment. An inverse floater produces less income and may decline in value when market rates and the rate payable on the floater rises. An inverse floater typically involves leverage, which may magnify a Fund's losses, and exhibits greater price and income volatility than an unleveraged bond with a similar maturity.

Management Risk. Investment decisions, techniques, analyses or models implemented by a Fund's manager or sub-adviser in seeking to achieve the Fund's investment objective may not produce the returns expected, may cause the Fund's shares to lose value or may cause the Fund to underperform other funds with similar investment objectives.

Market Risk. The values of, and/or the income generated by, securities held by a Fund may decline due to general market conditions or other factors, including those directly involving the issuers of such securities. Security markets are volatile and may decline significantly in response to adverse issuer, regulatory, political, or economic developments. Different sectors of the market and different security types may react differently to such developments.

Municipal Securities Risk. Municipal securities may be fully or partially backed or enhanced by the taxing authority of a local government, by the current or anticipated revenues from a specific project or specific assets, or by the credit of, or liquidity enhancement provided by, a private issuer. Various types of municipal securities are often related in such a way that political, economic or business developments affecting one obligation could affect other municipal securities held by a Fund.

Non-Diversification Risk. A Fund that is considered "non-diversified" under the 1940 Act is more vulnerable to market or economic events impacting issuers of individual portfolio securities than a "diversified" fund. Default by the issuer of an individual security in such a Fund's portfolio may have a greater negative effect on the Fund's return or net asset value than it would on the return or net asset value of a "diversified" fund.

Puerto Rico Municipal Securities Risk. Events in Puerto Rico are likely to affect a Fund's investments in Puerto Rico municipal securities. The majority of Puerto Rico's debt is issued by the major public agencies that are responsible for many of the island's public functions, such as water, wastewater, highways, electricity, education and public construction. Certain risks specific to Puerto Rico include persistent budget deficits and related fiscal and financial challenges, a high unemployment rate, and significant underfunded pension liabilities.

State Emphasis Risk. Securities issued by a particular state and its subdivisions, authorities, instrumentalities and corporations are subject to the risk of unfavorable developments occurring in such state. Such developments may adversely impact the liquidity and value of the municipal securities in which a Fund invests and, in turn, adversely impact the value of the Fund's shares.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversification Risk. A Fund that is considered "non-diversified" under the 1940 Act is more vulnerable to market or economic events impacting issuers of individual portfolio securities than a "diversified" fund. Default by the issuer of an individual security in such a Fund's portfolio may have a greater negative effect on the Fund's return or net asset value than it would on the return or net asset value of a "diversified" fund.
Risk Lose Money [Text] rr_RiskLoseMoney An investment in the Fund may lose money
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the Fund may lose money, is not a deposit of Wells Fargo Bank, N.A. or its affiliates, is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Performance </b></p>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year. The Fund's average annual total returns are compared to the performance of one or more indices. Past performance before and after taxes is no guarantee of future results. Current month-end performance is available on the Fund's website at wellsfargofunds.com.
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Returns do not reflect sales charges and would be lower if they did
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Highest Quarter: 3rd Quarter 2009

+4.25%

Lowest Quarter: 4th Quarter 2016

-2.77%

Year-to-date total return as of 9/30/2018 is -0.14%
Performance Table Heading rr_PerformanceTableHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Average Annual Total Returns for the periods ended 12/31/2017 (returns reflect applicable sales charges) </b></p> [18]
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts. After-tax returns are shown for only one class of shares. After-tax returns for any other class will vary.
Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads returns reflect applicable sales charges
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state, local or foreign taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to tax-exempt investors or investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) Plans or Individual Retirement Accounts.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance before and after taxes is no guarantee of future results.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown for only one class of shares.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress wellsfargofunds.com
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Wisconsin Tax-Free Fund) | Bloomberg Barclays Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 5.45%
5 Years rr_AverageAnnualReturnYear05 3.02%
10 Years rr_AverageAnnualReturnYear10 4.46%
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Wisconsin Tax-Free Fund) | Bloomberg Barclays Wisconsin Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 4.81%
5 Years rr_AverageAnnualReturnYear05 2.78%
10 Years rr_AverageAnnualReturnYear10 4.45%
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Wisconsin Tax-Free Fund) | Class A  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 4.50%
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [3]
Management Fees rr_ManagementFeesOverAssets 0.40%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.48%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.88%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets (0.18%)
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 0.70% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 518
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 701
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 899
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,470
Bar Chart [Heading] rr_BarChartHeading <p style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b>Calendar Year Total Returns for Class A as of 12/31 each year (Returns do not reflect sales charges and would be lower if they did)</b> </p> [18]
Annual Return 2008 rr_AnnualReturn2008 (1.76%)
Annual Return 2009 rr_AnnualReturn2009 10.71%
Annual Return 2010 rr_AnnualReturn2010 2.65%
Annual Return 2011 rr_AnnualReturn2011 7.87%
Annual Return 2012 rr_AnnualReturn2012 4.41%
Annual Return 2013 rr_AnnualReturn2013 (1.12%)
Annual Return 2014 rr_AnnualReturn2014 6.95%
Annual Return 2015 rr_AnnualReturn2015 2.67%
Annual Return 2016 rr_AnnualReturn2016 (0.25%)
Annual Return 2017 rr_AnnualReturn2017 4.30%
Year to Date Return, Label rr_YearToDateReturnLabel Year-to-date total return as of 9/30/2018 is -0.14%
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (0.14%)
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2018
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarter: 3rd Quarter 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 4.25%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2009
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarter: 4th Quarter 2016
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (2.77%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2016
1 Year rr_AverageAnnualReturnYear01 (0.36%)
5 Years rr_AverageAnnualReturnYear05 1.53%
10 Years rr_AverageAnnualReturnYear10 3.10%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Mar. 31, 2008
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Wisconsin Tax-Free Fund) | Class A | (after taxes on distributions)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (0.36%)
5 Years rr_AverageAnnualReturnYear05 1.41%
10 Years rr_AverageAnnualReturnYear10 2.99%
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Wisconsin Tax-Free Fund) | Class A | (after taxes on distributions and the sale of Fund Shares)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 0.88%
5 Years rr_AverageAnnualReturnYear05 1.70%
10 Years rr_AverageAnnualReturnYear10 3.00%
(WFA Municipal Fixed Income Funds - Classes A and C) | (Wells Fargo Wisconsin Tax-Free Fund) | Class C  
Prospectus: rr_ProspectusTable  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of offering price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management Fees rr_ManagementFeesOverAssets 0.40%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.75%
Other Expenses rr_OtherExpensesOverAssets 0.48%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.63%
Fee Waivers rr_FeeWaiverOrReimbursementOverAssets (0.18%)
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 1.45% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 248
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 497
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 870
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,918
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 148
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 497
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 870
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,918
1 Year rr_AverageAnnualReturnYear01 2.52%
5 Years rr_AverageAnnualReturnYear05 1.70%
10 Years rr_AverageAnnualReturnYear10 2.78%
Inception Date of Share Class rr_AverageAnnualReturnInceptionDate Dec. 26, 2002
[1] Investments of $250,000 or more are not subject to a front-end sales charge but generally will be subject to a deferred sales charge of 0.40% if redeemed within 12 months from the date of purchase.
[2] The Manager has contractually committed through October 31, 2019, to waive fees and/or reimburse expenses to the extent necessary to cap the Fund's Total Annual Fund Operating Expenses After Fee Waivers at the amounts shown above. Brokerage commissions, stamp duty fees, interest, taxes, acquired fund fees and expenses (if any), and extraordinary expenses are excluded from the expense cap. After this time, the cap may be increased or the commitment to maintain the cap may be terminated only with the approval of the Board of Trustees.
[3] Investments of $1 million or more are not subject to a front-end sales charge but generally will be subject to a deferred sales charge of 1.00% if redeemed within 18 months from the date of purchase.
[4] Historical performance shown for Class C shares prior to their inception reflects the performance of Class A shares, adjusted to reflect the higher expenses applicable to Class C shares.
[5] Expenses have been adjusted as necessary from amounts incurred during the Fund's most recent fiscal year to reflect current fees and expenses.
[6] Performance Since 1/31/2013
[7] The Manager has contractually committed through October 31, 2019, to waive fees and/or reimburse expenses to the extent necessary to cap the Fund's Total Annual Fund Operating Expenses After Fee Waivers at the amounts shown above. Brokerage commissions, stamp duty fees, interest, taxes, acquired fund fees and expenses (if any), and extraordinary expenses are excluded from the expense cap. After this time, the cap may be increased or the commitment to maintain the cap may be terminated only with the approval of the Board of Trustees.
[8] Investments of $500,000 or more are not subject to a front-end sales charge but generally will be subject to a deferred sales charge of 0.50% if redeemed within 12 months from the date of purchase.
[9] The Manager has contractually committed through October 31, 2019, to waive fees and/or reimburse expenses to the extent necessary to cap the Fund's Total Annual Fund Operating Expenses After Fee Waivers at the amounts shown above. Brokerage commissions, stamp duty fees, interest, taxes, acquired fund fees and expenses (if any), and extraordinary expenses are excluded from the expense cap. After this time, the cap may be increased or the commitment to maintain the cap may be terminated only with the approval of the Board of Trustees.
[10] The Manager has contractually committed through October 31, 2019, to waive fees and/or reimburse expenses to the extent necessary to cap the Fund's Total Annual Fund Operating Expenses After Fee Waivers at 0.85% for Class A, and 1.60% for Class C. Brokerage commissions, stamp duty fees, interest, taxes, acquired fund fees and expenses (if any), and extraordinary expenses are excluded from the expense cap. After this time, the cap may be increased or the commitment to maintain the cap may be terminated only with the approval of the Board of Trustees.
[11] Historical performance shown for Classes A and C of the Fund prior to July 12, 2010, is based on the performance of the Fund's predecessor, Evergreen North Carolina Municipal Bond Fund.
[12] The Manager has contractually committed through October 31, 2019, to waive fees and/or reimburse expenses to the extent necessary to cap the Fund's Total Annual Fund Operating Expenses After Fee Waivers at the amounts shown above. Brokerage commissions, stamp duty fees, interest, taxes, acquired fund fees and expenses (if any), and extraordinary expenses are excluded from the expense cap. After this time, the cap may be increased or the commitment to maintain the cap may be terminated only with the approval of the Board of Trustees.
[13] Historical performance shown for Classes A and C of the Fund prior to July 12, 2010, is based on the performance of the Fund's predecessor, Evergreen Pennsylvania Municipal Bond Fund.
[14] Performance shown reflects calendar year total returns for Class C shares, rather than Class A shares, because Class C shares have the longest period of annual returns. Historical performance shown for Class A shares prior to their inception reflects the performance of the former Investor Class shares, and includes the higher expenses applicable to the Investor Class shares (except during those periods in which the expenses of Class A shares would have been higher than those of the Investor Class shares). If these expenses had not been included, returns for Class A shares would be higher.
[15] Historical performance shown for Classes A and C of the Fund prior to July 12, 2010, is based on the performance of the Fund's predecessor, Evergreen Strategic Municipal Bond Fund.
[16] Investments of $250,000 or more are not subject to a front-end sales charge but generally will be subject to a deferred sales charge of 1.00% if redeemed within 18 months from the date of purchase.
[17] Effective June 20, 2008, the Advisor Class was renamed Class A and modified to assume the features and attributes of Class A. Performance shown for the Class A shares through June 19, 2008 includes Advisor Class expenses. Historical performance shown for Class C shares prior to their inception reflects the performance of Class A shares, adjusted to reflect the higher expenses applicable to Class C shares.
[18] Historical performance shown for Class A shares prior to their inception reflects the performance of the former Investor Class shares, and includes the higher expenses applicable to the former Investor Class shares (except during those periods in which expenses of Class A shares would have been higher than those of the former Investor Class shares, no such adjustment is reflected). If these expenses had not been included, returns for Class A shares would be higher.