rr_ObjectiveHeading

Investment Objective

rr_ExpenseHeading

Fees and Expenses of the Fund

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 Class A shares of eligible funds offered by PIMCO Equity Series and PIMCO Funds.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment):

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

October 31, 2019

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

If you redeem your shares at the end of each period:

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

80.00%

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The Fund seeks to achieve its investment objective by investing under normal circumstances at least 80% of its assets in a diversified portfolio of income-producing investments, and will typically invest between 60-80% of its assets in equity and equity-related securities (such portion of the Fund's portfolio, the "Equity Sleeve") providing exposure to a portfolio of stocks (the "RAE Income Global Portfolio") through investment in the securities that comprise the RAE Income Global Portfolio. Equity-related securities include securities having an equity component (e.g., hybrids, bank capital) and equity derivatives. With respect to investments in equity securities, there is no limitation on the market capitalization range of the issuers in which the Fund may invest. The stocks for the Equity Sleeve are selected by the Fund's sub-adviser, Research Affiliates, LLC (the "Sub-Adviser") from a broad universe of global equities.

The Sub-Adviser uses the RAE® methodology for portfolio construction with respect to the Equity Sleeve. The RAE® methodology is a rules-based model that selects and weights stocks by fundamental measures of company size, e.g., gross profit, cash flow, book value, dividends plus net buybacks, rather than by market capitalization and then incorporates additional active insights on measures such as quality and momentum, among other factors, to seek to enhance risk-adjusted returns. Selections are further refined through additional yield and financial health screens to create a portfolio that seeks to provide an attractive current yield and long-term capital appreciation. Actual stock positions in the RAE Income Global Portfolio, which drift apart from target weights as market prices change, are rebalanced to target weights periodically. The RAE® methodology's systematic portfolio rebalancing reflects a value orientation. Portfolio managers do not have discretion with respect to the allocations determined by the RAE® methodology. The RAE® methodology is not updated according to any predetermined schedule and generally is not expected to be updated during a given year.

The Sub-Adviser provides investment advisory services in connection with the Equity Sleeve's use of the RAE Income Global Portfolio by, among other things, providing PIMCO, and the Portfolio Implementer where applicable, with the constituents and target weights in the RAE Income Global Portfolio. The Equity Sleeve seeks to remain invested in the securities that comprise the RAE Income Global Portfolio even when the value of the RAE Income Global Portfolio is declining.

The Fund may also invest in "Fixed Income Instruments" of varying maturities. Fixed Income Instruments include bonds, debt securities and other similar instruments issued by various U.S. and non-U.S. public- or private-sector entities. The debt investments of the Fund may include investment-grade securities and high yield securities ("junk bonds") of any rating.

The Fund's approach to fixed income securities selection incorporates PIMCO's global macroeconomic views and fixed income investment expertise. The Fund's fixed income assets are selected based on fundamental analysis, as well as PIMCO's view regarding the attractiveness of key investment risk factors.

The Fund may also invest in derivative instruments, such as options, futures contracts, swap agreements, equity-linked notes, equity-linked securities and participatory notes, consistent with its investment objectives. The Fund may also invest in real estate investment trusts ("REITs"). The Fund may purchase or sell securities on a when-issued, delayed delivery or forward commitment basis and may engage in short sales. The Fund may also enter into reverse repurchase agreements and lend portfolio securities.

The Fund may invest a significant portion of its assets in securities and instruments that are economically tied to foreign (non-U.S.) countries. The Fund may obtain foreign currency exposure (from non-U.S. dollar-denominated securities or currencies) without limitation. With respect to its equity investments, the Fund may invest up to 20% of its total assets in securities and instruments that are economically tied to emerging market countries. With respect to its fixed income investments, the Fund may invest without limitation in securities and instruments that are economically tied to emerging market countries.

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

It is possible to lose money on an investment in the Fund. The principal risks of investing in the Fund, which could adversely affect its net asset value, yield and total return, are listed below.

Equity Risk: the risk that the value of equity securities, such as common stocks and preferred securities, may decline due to general market conditions which are not specifically related to a particular company or to factors affecting a particular industry or industries. Equity securities generally have greater price volatility than fixed income securities

Dividend-Oriented Stocks Risk: companies that have paid regular dividends to shareholders may decrease or eliminate dividend payments in the future. A decrease in dividend payments by an issuer may result in a decrease in the value of the security held by the Fund or the Fund receiving less income. In addition, equity securities with higher dividend yields may be sensitive to changes in interest rates, and as interest rates rise, the prices of such securities may fall. The Fund's use of a dividend capture strategy (i.e., purchasing an equity security shortly before the issuer pays a dividend and selling it shortly thereafter) exposes the Fund to higher portfolio turnover, increased trading costs, the potential for capital loss, particularly in the event of significant short-term price movements of stocks subject to dividend capture trading and may result in negative tax consequences

Value Investing Risk: a value stock may decrease in price or may not increase in price as anticipated by PIMCO if it continues to be undervalued by the market or the factors that the portfolio manager believes will cause the stock price to increase do not occur

Foreign (Non-U.S.) Investment Risk: the risk that investing in foreign (non-U.S.) securities may result in the Fund experiencing more rapid and extreme changes in value than a fund that invests exclusively in securities of U.S. companies, due to smaller markets, differing reporting, accounting and auditing standards, increased risk of delayed settlement of portfolio transactions or loss of certificates of portfolio securities, and the risk of unfavorable foreign government actions, including nationalization, expropriation or confiscatory taxation, currency blockage, or political changes or diplomatic developments. Foreign securities may also be less liquid and more difficult to value than securities of U.S. issuers

Emerging Markets Risk: the risk of investing in emerging market securities, primarily increased foreign (non-U.S.) investment risk

Sovereign Debt Risk: the risk that investments in fixed income instruments issued by sovereign entities may decline in value as a result of default or other adverse credit event resulting from an issuer's inability or unwillingness to make principal or interest payments in a timely fashion

Market Risk: the risk that the value of securities owned by the Fund may go up or down, sometimes rapidly or unpredictably, due to factors affecting securities markets generally or particular industries

Issuer Risk: the risk that the value of a security may decline for a reason directly related to the issuer, such as management performance, financial leverage and reduced demand for the issuer's goods or services

Interest Rate Risk: the risk that fixed income securities and dividend-paying equity securities will decline in value because of an increase in interest rates; a fund with a longer average portfolio duration will be more sensitive to changes in interest rates than a fund with a shorter average portfolio duration

Call Risk: the risk that an issuer may exercise its right to redeem a fixed income security earlier than expected (a call). Issuers may call outstanding securities prior to their maturity for a number of reasons (e.g., declining interest rates, changes in credit spreads and improvements in the issuer's credit quality). If an issuer calls a security that the Fund has invested in, the Fund may not recoup the full amount of its initial investment and may be forced to reinvest in lower-yielding securities, securities with greater credit risks or securities with other, less favorable features

Credit Risk: the risk that the Fund could lose money if the issuer or guarantor of a fixed income security, or the counterparty to a derivative contract, is unable or unwilling to meet its financial obligations

High Yield and Distressed Company Risk: the risk that high yield securities and unrated securities of similar credit quality (commonly known as "junk bonds") and securities of distressed companies may be subject to greater levels of credit, issuer and liquidity risks. Securities of distressed companies include both debt and equity securities. High yield securities and debt securities of distressed companies are considered primarily speculative with respect to the issuer's continuing ability to make principal and interest payments. Distressed companies may be engaged in restructurings or bankruptcy proceedings

Currency Risk: the risk that foreign (non-U.S.) currencies will change in value relative to the U.S. dollar and affect the Fund's investments in foreign (non-U.S.) currencies or in securities that trade in, and receive revenues in, or in derivatives that provide exposure to, foreign (non-U.S.) currencies

Real Estate Risk: the risk that the Fund's investments in Real Estate Investment Trusts ("REITs") or real estate-linked derivative instruments will subject the Fund to risks similar to those associated with direct ownership of real estate, including losses from casualty or condemnation, and changes in local and general economic conditions, supply and demand, interest rates, zoning laws, regulatory limitations on rents, property taxes and operating expenses. The Fund's investments in REITs or real estate-linked derivative instruments subject it to management and tax risks. In addition, privately traded REITs subject the Fund to liquidity and valuation risk

Liquidity Risk: the risk that a particular investment may be difficult to purchase or sell and that the Fund may be unable to sell illiquid securities at an advantageous time or price or achieve its desired level of exposure to a certain sector

Leveraging Risk: the risk that certain transactions of the Fund, such as reverse repurchase agreements, loans of portfolio securities, and the use of when-issued, delayed delivery or forward commitment transactions, or derivative instruments, may give rise to leverage, magnifying gains and losses and causing the Fund to be more volatile than if it had not been leveraged. This means that leverage entails a heightened risk of loss

Management Risk: the risk that the investment techniques and risk analyses applied by PIMCO, including the use of quantitative models or methods, will not produce the desired results and that legislative, regulatory, or tax restrictions, policies or developments may affect the investment techniques available to PIMCO and the individual portfolio manager in connection with managing the Fund. There is no guarantee that the investment objective of the Fund will be achieved

Small-Cap and Mid-Cap Company Risk: the risk that the value of securities issued by small-capitalization and mid-capitalization companies may go up or down, sometimes rapidly and unpredictably, due to narrow markets and limited managerial and financial resources

Derivatives Risk: the risk of investing in derivative instruments (such as futures, swaps and structured securities), including leverage, liquidity, interest rate, market, credit and management risks, mispricing or valuation complexity. Changes in the value of the derivative may not correlate perfectly with, and may be more sensitive to market events than, the underlying asset, rate or index, and the Fund could lose more than the initial amount invested. The Fund's use of derivatives may result in losses to the Fund, a reduction in the Fund's returns and/or increased volatility. Over-the-counter ("OTC") derivatives are also subject to the risk that a counterparty to the transaction will not fulfill its contractual obligations to the other party, as many of the protections afforded to centrally-cleared derivative transactions might not be available for OTC derivatives. For derivatives traded on an exchange or through a central counterparty, credit risk resides with the Fund's clearing broker, or the clearinghouse itself, rather than with a counterparty in an OTC derivative transaction. Changes in regulation relating to a mutual fund's use of derivatives and related instruments could potentially limit or impact the Fund's ability to invest in derivatives, limit the Fund's ability to employ certain strategies that use derivatives and/or adversely affect the value of derivatives and the Fund's performance

Model Risk: the risk that the Fund's investment models used in making investment allocation decisions may not adequately take into account certain factors, may contain design flaws or faulty assumptions, and may rely on incomplete or inaccurate data, any of which may result in a decline in the value of an investment in the Fund

Mortgage-Related and Other Asset-Backed Risk: the risk of investing in mortgage-related and other asset-backed securities, including interest rate risk, extension risk, prepayment risk and credit risk

Short Exposure Risk: the risk of entering into short sales, including the potential loss of more money than the actual cost of the investment, and the risk that the third party to the short sale will not fulfill its contractual obligations, causing a loss to the Fund

Convertible Securities Risk: as convertible securities share both fixed income and equity characteristics, they are subject to risks to which fixed income and equity investments are subject. These risks include equity risk, interest rate risk and credit risk

Please see "Description of Principal Risks" in the Fund's prospectus for a more detailed description of the risks of investing in the Fund. An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

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

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The performance information shows summary performance information for the Fund in a bar chart and an Average Annual Total Returns table. The information provides some indication of the risks of investing in the Fund by showing changes in its performance from year to year and by showing how the Fund's average annual returns compare with the returns of a broad-based securities market index and an additional index. Absent any applicable fee waivers and/or expense limitations, performance would have been lower. The bar chart shows performance of the Fund's Institutional Class shares. Performance for Class A and Class C shares in the Average Annual Total Returns table reflects the impact of sales charges. The I-3 shares of the Fund have not commenced operations as of the date of this prospectus. The Fund's past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.

The Fund measures its performance against a primary benchmark and an additional benchmark. The Fund's primary benchmark is the MSCI World Index. The MSCI World Index is a free float-adjusted market capitalization weighted index that is designed to measure the equity market performance of developed markets. The MSCI World Index consists of 23 developed market country indexes. The Fund's additional benchmark is a blend of 75% MSCI World Index/25% Bloomberg Barclays Global Aggregate USD Unhedged. Bloomberg Barclays Global Aggregate USD Unhedged provides a broad-based measure of the global investment-grade fixed income markets. The three major components of this index are the U.S. Aggregate, the Pan-European Aggregate, and the Asian-Pacific Aggregate Indices.

Performance for the Fund is updated daily and quarterly and may be obtained at https://www.pimco.com/en-us/product-finder.

Bar Chart Footnotes [Text Block]

rr_BarChartFootnotesTextBlock

*The year-to-date return as of September 30, 2018 is 0.79%. For the periods shown in the bar chart, the highest quarterly return was 7.32% in the Q4 2013, and the lowest quarterly return was -11.46% in the Q3 2015.

Performance Table Does Reflect Sales Loads

rr_PerformanceTableDoesReflectSalesLoads

Performance for Class A and Class C shares in the Average Annual Total Returns table reflects the impact of sales charges.

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 the after-tax returns shown are not relevant to 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

The Fund's past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns are for Institutional Class shares only. After-tax returns for other classes will vary.

1 Year

rr_AverageAnnualReturnYear01

22.40%

Since Inception

rr_AverageAnnualReturnSinceInception

12.92%

1 Year

rr_AverageAnnualReturnYear01

18.49%

Since Inception

rr_AverageAnnualReturnSinceInception

10.07%

Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Management Fees

rr_ManagementFeesOverAssets

0.79%

Other Expenses

rr_OtherExpensesOverAssets

0.07%

^[1]

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.01%)

^[2],[3]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 87

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

476

Annual Return 2012

rr_AnnualReturn2012

14.29%

Annual Return 2014

rr_AnnualReturn2014

3.73%

Annual Return 2016

rr_AnnualReturn2016

9.93%

Year to Date Return, Label

rr_YearToDateReturnLabel

The year-to-date return as of September 30, 2018 is 0.79%.

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2018

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

7.32%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

the lowest quarterly return was -11.46% in the Q3 2015

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2015

5 Years

rr_AverageAnnualReturnYear05

7.01%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 14, 2011

Prospectus:

rr_ProspectusTable

5 Years

rr_AverageAnnualReturnYear05

5.48%

^[4]

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 14, 2011

^[4]

Prospectus:

rr_ProspectusTable

5 Years

rr_AverageAnnualReturnYear05

5.18%

^[4]

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 14, 2011

^[4]

Prospectus:

rr_ProspectusTable

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of the original purchase price or redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.96%

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

0.95%

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

305

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,777

5 Years

rr_AverageAnnualReturnYear05

6.93%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 14, 2011

Prospectus:

rr_ProspectusTable

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of the original purchase price or redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.06%

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

1.00%

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

331

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,289

Prospectus:

rr_ProspectusTable

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of the original purchase price or redemption price)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.21%

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

1.20%

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

912

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,934

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

912

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,934

5 Years

rr_AverageAnnualReturnYear05

5.45%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 14, 2011

Prospectus:

rr_ProspectusTable

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of the original purchase price or redemption price)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.96%

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

1.95%

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

614

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,284

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

614

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 2,284

5 Years

rr_AverageAnnualReturnYear05

5.83%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 14, 2011

Prospectus:

rr_ProspectusTable

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Fund seeks long-term capital appreciation.

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. In addition to the fees and expenses described below, you may also be required to pay brokerage commissions on purchases and sales of Institutional Class, I-2 or I-3 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 Class A shares of eligible funds offered by PIMCO Equity Series and PIMCO Funds. More information about these and other discounts is available in the "Classes of Shares" section on page 48 of the Fund's prospectus, Appendix B to the Fund's prospectus (Financial Firm-Specific Sales Charge Waivers and Discounts) or from your financial advisor.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment):

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

Example. The Example is intended to help you compare the cost of investing in Institutional Class, I-2, I-3, Class A or Class C shares of the Fund with the costs of investing in other mutual funds. The Example assumes that you invest $10,000 in the noted class of shares for the time periods indicated, and then redeem all your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. Investors may pay brokerage commissions on their purchases and sales of Institutional Class, I-2 or I-3 shares of the Fund, which are not reflected in the Example. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

If you do not redeem your shares:

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs 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 the Annual Fund Operating Expenses or in the Example tables, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 276% of the average value of its portfolio.

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategies

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

Issuer Non-Diversification Risk: the risk of focusing investments in a small number of issuers, including being more susceptible to risks associated with a single economic, political or regulatory occurrence than a more diversified portfolio might be. Funds that are "non-diversified" may invest a greater percentage of their assets in the securities of a single issuer than funds that are "diversified"

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

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

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The performance information shows summary performance information for the Fund in a bar chart and an Average Annual Total Returns table. The information provides some indication of the risks of investing in the Fund by showing changes in its performance from year to year and by showing how the Fund's average annual returns compare with the returns of a broad-based securities market index.

A privately offered fund was reorganized into the Fund, and the Fund commenced operations on April 20, 2012. This privately offered fund was organized on December 1, 2002 and commenced operations on January 1, 2003 and had an investment objective and strategies that were, in all material respects, the same as those of the Fund, and was managed by an investment adviser (that was subsequently acquired by PIMCO in connection with the privately offered fund's reorganization) in a manner that, in all material respects, complied with the investment guidelines and restrictions of the Fund. However, the privately offered fund was not registered as an investment company under the Investment Company Act of 1940, as amended (the "1940 Act"), and the privately offered fund was not subject to certain investment limitations, diversification requirements, liquidity requirements, and other restrictions imposed by the 1940 Act and the Internal Revenue Code of 1986, as amended, which, if applicable, may have adversely affected its performance.

The Fund's performance for periods prior to the commencement of operations on April 20, 2012 is that of the privately offered fund (net of actual fees and expenses charged to individual privately offered fund accounts in the aggregate). The performance of the privately offered fund has not been restated to reflect the fees, expenses and fee waivers and/or expense limitations applicable to each class of shares of the Fund. If the performance of the privately offered fund had been restated to reflect the applicable fees and expenses of each class of shares of the Fund, the performance may have been higher (if applicable Fund fees and expenses were lower than actual fees and expenses charged to individual privately offered fund accounts in the aggregate) or lower (if applicable Fund fees and expenses were higher than actual fees and expenses charged to individual privately offered fund accounts in the aggregate) than the performance shown in the bar chart and Average Annual Total Returns table below. For periods following the Fund's commencement of operations on April 20, 2012, the performance of each class of shares differs as a result of the different levels of fees and expenses applicable to each class of shares, and performance for Class A and Class C shares reflects the impact of sales charges. Because I-3 shares of the Fund had not commenced operations as of December 31, 2017, no performance for I-3 shares is provided. The Fund's past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.

The Fund's benchmark index is the 3 Month USD LIBOR Index. LIBOR (London Interbank Offered Rate) is an average interest rate, determined by the ICE Benchmark Administration, that banks charge one another for the use of short-term money (3 months) in England's Eurodollar market. The privately offered fund began operations on January 1, 2003. Index comparisons began on December 31, 2002.

Performance for the Fund is updated daily and quarterly and may be obtained at https://www.pimco.com/en-us/product-finder.

Bar Chart Footnotes [Text Block]

rr_BarChartFootnotesTextBlock

*The year-to-date return as of September 30, 2018 is 3.82%. For the periods shown in the bar chart, the highest quarterly return was 14.62% in the Q3 2009, and the lowest quarterly return was -7.49% in the Q3 2011.

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

In some cases the return after taxes may exceed the return before taxes due to an assumed tax benefit from any losses on a sale of Fund shares at the end of the measurement period.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The performance information shows summary performance information for the Fund in a bar chart and an Average Annual Total Returns table. The information provides some indication of the risks of investing in the Fund by showing changes in its performance from year to year and by showing how the Fund's average annual returns compare with the returns of a broad-based securities market index.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

https://www.pimco.com/en-us/product-finder

Prospectus:

rr_ProspectusTable

5 Years

rr_AverageAnnualReturnYear05

0.54%

Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Management Fees

rr_ManagementFeesOverAssets

1.49%

Other Expenses

rr_OtherExpensesOverAssets

0.57%

^[5]

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.01%)

^[2],[3]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 208

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,108

Annual Return 2008

rr_AnnualReturn2008

(4.54%)

Annual Return 2010

rr_AnnualReturn2010

6.28%

Annual Return 2012

rr_AnnualReturn2012

0.26%

Annual Return 2014

rr_AnnualReturn2014

(1.55%)

Annual Return 2016

rr_AnnualReturn2016

2.00%

Year to Date Return, Label

rr_YearToDateReturnLabel

The year-to-date return as of September 30, 2018 is 3.82%.

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2018

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

14.62%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

the lowest quarterly return was -7.49% in the Q3 2011

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

5 Years

rr_AverageAnnualReturnYear05

8.41%

1 Year

rr_AverageAnnualReturnYear01

8.15%

^[4]

10 Years

rr_AverageAnnualReturnYear10

5.13%

^[4]

Prospectus:

rr_ProspectusTable

5 Years

rr_AverageAnnualReturnYear05

6.27%

^[4]

Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Management Fees

rr_ManagementFeesOverAssets

1.59%

Other Expenses

rr_OtherExpensesOverAssets

0.57%

^[5]

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.01%)

^[2],[3]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 218

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,158

1 Year

rr_AverageAnnualReturnYear01

9.83%

10 Years

rr_AverageAnnualReturnYear10

5.67%

Prospectus:

rr_ProspectusTable

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of the original purchase price or redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

2.26%

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

2.20%

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

701

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 2,590

Prospectus:

rr_ProspectusTable

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of the original purchase price or redemption price)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

2.41%

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

2.40%

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

1,259

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

3,145

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

1,259

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 3,145

5 Years

rr_AverageAnnualReturnYear05

6.83%

Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Management Fees

rr_ManagementFeesOverAssets

1.59%

Other Expenses

rr_OtherExpensesOverAssets

0.57%

^[5]

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.01%)

^[2],[3]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 418

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,653

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

318

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,653

1 Year

rr_AverageAnnualReturnYear01

7.74%

10 Years

rr_AverageAnnualReturnYear10

5.05%

Prospectus:

rr_ProspectusTable

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Fund seeks long-term capital appreciation.

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. In addition to the fees and expenses described below, you may also be required to pay brokerage commissions on purchases and sales of Institutional Class or I-2 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 Class A shares of eligible funds offered by PIMCO Equity Series and PIMCO Funds. More information about these and other discounts is available in the "Classes of Shares" section on page 48 of the Fund's prospectus, Appendix B to the Fund's prospectus (Financial Firm-Specific Sales Charge Waivers and Discounts) or from your financial advisor.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment):

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

Example. The Example is intended to help you compare the cost of investing in Institutional Class, I-2 or Class A shares of the Fund with the costs of investing in other mutual funds. The Example assumes that you invest $10,000 in the noted class of shares for the time periods indicated, and then redeem all your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. Investors may pay brokerage commissions on their purchases and sales of Institutional Class shares or I-2 shares of the Fund, which are not reflected in the Example. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

If you do not redeem your shares:

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs 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 the Annual Fund Operating Expenses or in the Example tables, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 28% of the average value of its portfolio.

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategies

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Lose Money [Text]

rr_RiskLoseMoney

It is possible to lose money on an investment in the Fund.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance Information

Bar Chart [Heading]

rr_BarChartHeading

Calendar Year Total Returns — Institutional Class*

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for periods ended 12/31/17)

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 the after-tax returns shown are not relevant to 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

The Fund's past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns are for Institutional Class shares only. After-tax returns for other classes will vary.

1 Year

rr_AverageAnnualReturnYear01

28.07%

10 Years

rr_AverageAnnualReturnYear10

0.91%

Prospectus:

rr_ProspectusTable

5 Years

rr_AverageAnnualReturnYear05

4.35%

Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Management Fees

rr_ManagementFeesOverAssets

0.95%

Other Expenses

rr_OtherExpensesOverAssets

0.02%

^[6]

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.21%)

^[7],[8]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 78

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

516

Annual Return 2008

rr_AnnualReturn2008

(53.63%)

Annual Return 2010

rr_AnnualReturn2010

20.34%

Annual Return 2012

rr_AnnualReturn2012

19.40%

Annual Return 2014

rr_AnnualReturn2014

(1.85%)

Annual Return 2016

rr_AnnualReturn2016

32.50%

Year to Date Return, Label

rr_YearToDateReturnLabel

The year-to-date return as of September 30, 2018 is -6.06%.

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2018

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

42.88%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

the lowest quarterly return was -26.40% in the Q4 2008

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

5 Years

rr_AverageAnnualReturnYear05

4.29%

1 Year

rr_AverageAnnualReturnYear01

25.49%

^[4]

10 Years

rr_AverageAnnualReturnYear10

2.05%

^[4]

Prospectus:

rr_ProspectusTable

5 Years

rr_AverageAnnualReturnYear05

2.94%

^[4]

Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Management Fees

rr_ManagementFeesOverAssets

1.05%

Other Expenses

rr_OtherExpensesOverAssets

0.02%

^[6]

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.21%)

^[7],[8]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 88

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

570

1 Year

rr_AverageAnnualReturnYear01

29.03%

10 Years

rr_AverageAnnualReturnYear10

2.48%

Prospectus:

rr_ProspectusTable

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of the original purchase price or redemption price)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.32%

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

1.11%

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

758

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,888

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

758

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,888

5 Years

rr_AverageAnnualReturnYear05

3.34%

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Fund

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 Class A shares of eligible funds offered by PIMCO Equity Series and PIMCO Funds.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment):

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

October 31, 2019

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

Example. The Example is intended to help you compare the cost of investing in Institutional Class, I-2 or Class A shares of the Fund with the costs of investing in other mutual funds. The Example assumes that you invest $10,000 in the noted class of shares for the time periods indicated, and then redeem all your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. Investors may pay brokerage commissions on their purchases and sales of Institutional Class shares or I-2 shares of the Fund, which are not reflected in the Example. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

If you do not redeem your shares:

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs 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 the Annual Fund Operating Expenses or in the Example tables, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 9% of the average value of its portfolio.

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategies

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Lose Money [Text]

rr_RiskLoseMoney

It is possible to lose money on an investment in the Fund.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance Information

Bar Chart [Heading]

rr_BarChartHeading

Calendar Year Total Returns — Institutional Class*

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for periods ended 12/31/17)

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

In some cases the return after taxes may exceed the return before taxes due to an assumed tax benefit from any losses on a sale of Fund shares at the end of the measurement period.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The performance information shows summary performance information for the Fund in a bar chart and an Average Annual Total Returns table. The information provides some indication of the risks of investing in the Fund by showing changes in its performance from year to year and by showing how the Fund's average annual returns compare with the returns of a primary and a secondary broad-based securities market index. Absent any applicable fee waivers and/or expense limitations, performance would have been lower. The bar chart shows performance of the Fund's Institutional Class shares. Performance for Class A shares in the Average Annual Total Returns table reflects the impact of sales charges. The Fund's past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

https://www.pimco.com/en-us/product-finder

Prospectus:

rr_ProspectusTable

Since Inception

rr_AverageAnnualReturnSinceInception

5.76%

1 Year

rr_AverageAnnualReturnYear01

27.19%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jun. 05, 2015

Prospectus:

rr_ProspectusTable

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of the original purchase price or redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.55%

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.77%)

^{[10],[11],[12]}

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 56

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

650

Annual Return 2016

rr_AnnualReturn2016

12.99%

Year to Date Return, Label

rr_YearToDateReturnLabel

The year-to-date return as of September 30, 2018 is -4.07%.

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2018

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

7.71%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

the lowest quarterly return was 0.93% in the Q2 2016

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Jun. 30, 2016

Since Inception

rr_AverageAnnualReturnSinceInception

8.08%

1 Year

rr_AverageAnnualReturnYear01

24.31%

^[4]

Inception Date

rr_AverageAnnualReturnInceptionDate

Jun. 05, 2015

^[4]

Prospectus:

rr_ProspectusTable

Since Inception

rr_AverageAnnualReturnSinceInception

5.96%

^[4]

Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Management Fees

rr_ManagementFeesOverAssets

0.85%

Other Expenses

rr_OtherExpensesOverAssets

0.02%

^[6]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.42%

^[9]

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

0.65%

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

373

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,635

Since Inception

rr_AverageAnnualReturnSinceInception

7.93%

Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

3.75%

Management Fees

rr_ManagementFeesOverAssets

0.85%

Other Expenses

rr_OtherExpensesOverAssets

0.02%

^[6]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.67%

^[9]

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

0.90%

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

809

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,215

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

809

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 2,215

Since Inception

rr_AverageAnnualReturnSinceInception

6.13%

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Fund

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 Class A shares of eligible funds offered by PIMCO Equity Series and PIMCO Funds.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment):

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

October 31, 2019

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

Example. The Example is intended to help you compare the cost of investing in Institutional Class, I-2 or Class A shares of the Fund with the costs of investing in other mutual funds. The Example assumes that you invest $10,000 in the noted class of shares for the time periods indicated, and then redeem all your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. Investors may pay brokerage commissions on their purchases and sales of Institutional Class shares or I-2 shares of the Fund, which are not reflected in the Example. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

If you do not redeem your shares:

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs 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 the Annual Fund Operating Expenses or in the Example tables, 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.

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategies

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Lose Money [Text]

rr_RiskLoseMoney

It is possible to lose money on an investment in the Fund.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance Information

Bar Chart [Heading]

rr_BarChartHeading

Calendar Year Total Returns — Institutional Class*

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for periods ended 12/31/17)

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

In some cases the return after taxes may exceed the return before taxes due to an assumed tax benefit from any losses on a sale of Fund shares at the end of the measurement period.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The performance information shows summary performance information for the Fund in a bar chart and an Average Annual Total Returns table. The information provides some indication of the risks of investing in the Fund by showing changes in its performance from year to year and by showing how the Fund's average annual returns compare with the returns of a primary and a secondary broad-based securities market index. Absent any applicable fee waivers and/or expense limitations, performance would have been lower. The bar chart shows performance of the Fund's Institutional Class shares. Performance for Class A shares in the Average Annual Total Returns table reflects the impact of sales charges. The Fund's past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

https://www.pimco.com/en-us/product-finder

Prospectus:

rr_ProspectusTable

Since Inception

rr_AverageAnnualReturnSinceInception

8.18%

1 Year

rr_AverageAnnualReturnYear01

23.97%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jun. 05, 2015

Prospectus:

rr_ProspectusTable

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of the original purchase price or redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.49%

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.70%)

^{[10],[11],[13]}

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 52

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

598

Annual Return 2016

rr_AnnualReturn2016

14.40%

Year to Date Return, Label

rr_YearToDateReturnLabel

The year-to-date return as of September 30, 2018 is 1.15%.

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2018

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

6.40%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

the lowest quarterly return was 1.75% in the Q2 2016

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Jun. 30, 2016

Since Inception

rr_AverageAnnualReturnSinceInception

9.54%

1 Year

rr_AverageAnnualReturnYear01

19.85%

^[4]

Inception Date

rr_AverageAnnualReturnInceptionDate

Jun. 05, 2015

^[4]

Prospectus:

rr_ProspectusTable

Since Inception

rr_AverageAnnualReturnSinceInception

7.03%

^[4]

Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Management Fees

rr_ManagementFeesOverAssets

0.80%

Other Expenses

rr_OtherExpensesOverAssets

0.02%

^[6]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.31%

^[9]

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

0.61%

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

346

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,518

Since Inception

rr_AverageAnnualReturnSinceInception

9.42%

Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

3.75%

Management Fees

rr_ManagementFeesOverAssets

0.80%

Other Expenses

rr_OtherExpensesOverAssets

0.02%

^[6]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.56%

^[9]

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

0.86%

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

783

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,105

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

783

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 2,105

Since Inception

rr_AverageAnnualReturnSinceInception

7.56%

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Fund

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 Class A shares of eligible funds offered by PIMCO Equity Series and PIMCO Funds.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment):

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

October 31, 2019

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

If you redeem your shares at the end of each period:

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

47.00%

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The Fund seeks to achieve its investment objective under normal circumstances by obtaining exposure to a portfolio of stocks economically tied to at least three foreign (non-U.S.) countries ("RAE International Portfolio") through investment in the securities that comprise the RAE International Portfolio. The stocks are selected by the Fund's sub-adviser, Research Affiliates, LLC ("Sub-Adviser"), from a broad universe of companies which satisfy certain liquidity and capacity requirements.

The Sub-Adviser uses the RAE® methodology for portfolio construction. The RAE® methodology is a rules-based model that selects and weights stocks by fundamental measures of company size, e.g., gross profit, cash flow, book value, dividends plus net buybacks, rather than by market capitalization and then incorporates additional active insights on measures such as quality and momentum, among other factors, to seek to enhance risk-adjusted returns. Actual stock positions in the RAE International Portfolio, which drift apart from target weights as market prices change, are rebalanced to target weights periodically. The RAE® methodology's systematic portfolio rebalancing reflects a value orientation. Portfolio managers do not have discretion with respect to the allocations determined by the RAE® methodology. The RAE® methodology is not updated according to any predetermined schedule and generally is not expected to be updated during a given year.

The Sub-Adviser provides investment advisory services in connection with the Fund's use of the RAE International Portfolio by, among other things, providing PIMCO, and the Portfolio Implementer where applicable, with the constituents and target weights in the RAE International Portfolio. The Fund seeks to remain invested in the securities that comprise RAE International Portfolio even when the value of the RAE International Portfolio is declining.

The Fund may invest, without limitation, in equity and equity-related securities, including common and preferred securities. Equity-related securities include securities having an equity component (e.g., hybrids, bank capital) and equity derivatives. With respect to investments in equity securities, there is no limitation on the market capitalization range of the issuers in which the Fund may invest. The Fund may also invest in derivative instruments, such as options, forwards, futures contracts, options on futures and swap agreements, consistent with its investment objective. The Fund may also invest in real estate investment trusts ("REITs"). The Fund may purchase or sell securities on a when-issued, delayed delivery or forward commitment basis. The Fund may also enter into reverse repurchase agreements and lend portfolio securities.

The Fund may invest, without limitation, in securities and instruments denominated in foreign currencies and in securities of foreign issuers. The Fund may invest, without limitation, in securities and instruments that are economically tied to emerging market countries. The Fund may obtain foreign currency exposure (from non-U.S. dollar-denominated securities or currencies) without limitation.

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

It is possible to lose money on an investment in the Fund. The principal risks of investing in the Fund, which could adversely affect its net asset value, yield and total return, are listed below.

Equity Risk: the risk that the value of equity securities, such as common stocks and preferred securities, may decline due to general market conditions which are not specifically related to a particular company or to factors affecting a particular industry or industries. Equity securities generally have greater price volatility than fixed income securities

Value Investing Risk: a value stock may decrease in price or may not increase in price as anticipated by the Sub-Adviser if it continues to be undervalued by the market or the factors that the portfolio manager believes will cause the stock price to increase do not occur

Foreign (Non-U.S.) Investment Risk: the risk that investing in foreign (non-U.S.) securities may result in the Fund experiencing more rapid and extreme changes in value than a fund that invests exclusively in securities of U.S. companies, due to smaller markets, differing reporting, accounting and auditing standards, increased risk of delayed settlement of portfolio transactions or loss of certificates of portfolio securities, and the risk of unfavorable foreign government actions, including nationalization, expropriation or confiscatory taxation, currency blockage, or political changes or diplomatic developments. Foreign securities may also be less liquid and more difficult to value than securities of U.S. issuers

Emerging Markets Risk: the risk of investing in emerging market securities, primarily increased foreign (non-U.S.) investment risk

Market Risk: the risk that the value of securities owned by the Fund may go up or down, sometimes rapidly or unpredictably, due to factors affecting securities markets generally or particular industries

Issuer Risk: the risk that the value of a security may decline for a reason directly related to the issuer, such as management performance, financial leverage and reduced demand for the issuer's goods or services

Credit Risk: the risk that the Fund could lose money if the counterparty to a derivative contract is unable or unwilling to meet its financial obligations

Currency Risk: the risk that foreign (non-U.S.) currencies will change in value relative to the U.S. dollar and affect the Fund's investments in foreign (non-U.S.) currencies or in securities that trade in, and receive revenues in, or in derivatives that provide exposure to, foreign (non-U.S.) currencies

Real Estate Risk: the risk that the Fund's investments in Real Estate Investment Trusts ("REITs") or real estate-linked derivative instruments will subject the Fund to risks similar to those associated with direct ownership of real estate, including losses from casualty or condemnation, and changes in local and general economic conditions, supply and demand, interest rates, zoning laws, regulatory limitations on rents, property taxes and operating expenses. The Fund's investments in REITs or real estate-linked derivative instruments subject it to management and tax risks. In addition, privately traded REITs subject the Fund to liquidity and valuation risk

Liquidity Risk: the risk that a particular investment may be difficult to purchase or sell and that the Fund may be unable to sell illiquid securities at an advantageous time or price or achieve its desired level of exposure to a certain sector

Leveraging Risk: the risk that certain transactions of the Fund, such as reverse repurchase agreements, loans of portfolio securities, and the use of when-issued, delayed delivery or forward commitment transactions, or derivative instruments, may give rise to leverage, magnifying gains and losses and causing the Fund to be more volatile than if it had not been leveraged. This means that leverage entails a heightened risk of loss

Management Risk: the risk that the investment techniques and risk analyses applied by the Sub-Adviser, including the use of quantitative models or methods, will not produce the desired results and that legislative, regulatory, or tax restrictions, policies or developments may affect the investment techniques available to the Sub-Adviser and the individual portfolio manager in connection with managing the Fund. There is no guarantee that the investment objective of the Fund will be achieved

Derivatives Risk: the risk of investing in derivative instruments (such as futures, swaps and structured securities), including leverage, liquidity, interest rate, market, credit and management risks, mispricing or valuation complexity. Changes in the value of the derivative may not correlate perfectly with, and may be more sensitive to market events than, the underlying asset, rate or index, and the Fund could lose more than the initial amount invested. The Fund's use of derivatives may result in losses to the Fund, a reduction in the Fund's returns and/or increased volatility. Over-the-counter ("OTC") derivatives are also subject to the risk that a counterparty to the transaction will not fulfill its contractual obligations to the other party, as many of the protections afforded to centrally-cleared derivative transactions might not be available for OTC derivatives. For derivatives traded on an exchange or through a central counterparty, credit risk resides with the Fund's clearing broker, or the clearinghouse itself, rather than with a counterparty in an OTC derivative transaction. Changes in regulation relating to a mutual fund's use of derivatives and related instruments could potentially limit or impact the Fund's ability to invest in derivatives, limit the Fund's ability to employ certain strategies that use derivatives and/or adversely affect the value of derivatives and the Fund's performance

Model Risk: the risk that the Fund's investment models used in making investment allocation decisions may not adequately take into account certain factors, may contain design flaws or faulty assumptions, and may rely on incomplete or inaccurate data, any of which may result in a decline in the value of an investment in the Fund

Please see "Description of Principal Risks" in the Fund's prospectus for a more detailed description of the risks of investing in the Fund. An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

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

Performance Narrative [Text Block]

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The performance information shows summary performance information for the Fund in a bar chart and an Average Annual Total Returns table. The information provides some indication of the risks of investing in the Fund by showing changes in its performance from year to year and by showing how the Fund's average annual returns compare with the returns of a primary and a secondary broad-based securities market index. Absent any applicable fee waivers and/or expense limitations, performance would have been lower. The bar chart shows performance of the Fund's Institutional Class shares. Performance for Class A shares in the Average Annual Total Returns table reflects the impact of sales charges. The Fund's past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.

The Fund measures its performance against a primary benchmark and a secondary benchmark. The Fund's primary benchmark is the MSCI EAFE Value Index.

Effective February 28, 2019, the Fund's primary benchmark is the MSCI EAFE Value Index. The MSCI EAFE Value Index captures large and mid-cap securities exhibiting overall value style characteristics across developed markets countries around the world, excluding the US and Canada. The value investment style characteristics for index construction of the MSCI EAFE Value Index are defined using three variables: book value to price, 12-month forward earnings to price and dividend yield. The Fund believes that the new primary benchmark better aligns with the Fund's investment strategy. The MSCI EAFE Index is an unmanaged index designed to represent the performance of large and mid-cap securities across 21 developed markets, including countries in Europe, Australasia and the Far East, excluding the U.S. and Canada.

Performance for the Fund will be updated daily and quarterly and may be obtained at https://www.pimco.com/en-us/product-finder.

Bar Chart Footnotes [Text Block]

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*The year-to-date return as of September 30, 2018 is -3.32%. For the periods shown in the bar chart, the highest quarterly return was 7.30% in the Q3 2017, and the lowest quarterly return was -0.92% in the Q1 2016.

Performance Table Does Reflect Sales Loads

rr_PerformanceTableDoesReflectSalesLoads

Performance for Class A shares in the Average Annual Total Returns table reflects the impact of sales charges.

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 the after-tax returns shown are not relevant to 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]

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The Fund's past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.

Performance Table One Class of after Tax Shown [Text]

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After-tax returns are for Institutional Class shares only. After-tax returns for other classes will vary.

1 Year

rr_AverageAnnualReturnYear01

21.44%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jun. 05, 2015

Prospectus:

rr_ProspectusTable

Since Inception

rr_AverageAnnualReturnSinceInception

6.41%

Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Management Fees

rr_ManagementFeesOverAssets

0.60%

Other Expenses

rr_OtherExpensesOverAssets

0.02%

^[6]

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.11%)

^[8],[14]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 52

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

335

Annual Return 2016

rr_AnnualReturn2016

8.23%

Year to Date Return, Label

rr_YearToDateReturnLabel

The year-to-date return as of September 30, 2018 is -3.32%.

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2018

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

7.30%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

the lowest quarterly return was -0.92% in the Q1 2016

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Mar. 31, 2016

Since Inception

rr_AverageAnnualReturnSinceInception

7.36%

1 Year

rr_AverageAnnualReturnYear01

24.11%

^[4]

Inception Date

rr_AverageAnnualReturnInceptionDate

Jun. 05, 2015

^[4]

Prospectus:

rr_ProspectusTable

Since Inception

rr_AverageAnnualReturnSinceInception

5.58%

^[4]

Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Management Fees

rr_ManagementFeesOverAssets

0.70%

Other Expenses

rr_OtherExpensesOverAssets

0.02%

^[6]

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.11%)

^[8],[14]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 62

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

390

1 Year

rr_AverageAnnualReturnYear01

24.88%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jun. 05, 2015

Prospectus:

rr_ProspectusTable

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of the original purchase price or redemption price)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.97%

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

0.86%

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

662

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,510

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

662

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,510

Since Inception

rr_AverageAnnualReturnSinceInception

5.42%

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Fund

Expense Breakpoint Discounts [Text]

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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 Class A shares of eligible funds offered by PIMCO Equity Series and PIMCO Funds.

Shareholder Fees Caption [Text]

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Shareholder Fees (fees paid directly from your investment):

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

October 31, 2019

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

If you redeem your shares at the end of each period:

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

44.00%

Strategy Narrative [Text Block]

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The Fund seeks to achieve its investment objective by investing under normal circumstances at least 80% of its assets in securities of companies economically tied to the United States (for purposes of this section only, "U.S. companies"). Specifically, under normal circumstances, the Fund will obtain exposure to a portfolio of stocks of U.S. companies ("RAE US Portfolio") through investment in the securities that comprise the RAE US Portfolio. The stocks are selected by the Fund's sub-adviser, Research Affiliates, LLC ("Sub-Adviser"), from a broad universe of companies which satisfy certain liquidity and capacity requirements.

The Sub-Adviser uses the RAE® methodology for portfolio construction. The RAE® methodology is a rules-based model that selects and weights stocks by fundamental measures of company size, e.g., gross profit, cash flow, book value, dividends plus net buybacks, rather than by market capitalization and then incorporates additional active insights on measures such as quality and momentum, among other factors, to seek to enhance risk-adjusted returns. The Sub-Adviser applies the RAE® methodology to the large and mid-sized U.S. companies as determined by cumulative fundamental measures of company size. Actual stock positions in the RAE US Portfolio, which drift apart from target weights as market prices change, are rebalanced to target weights periodically. The RAE® methodology's systematic portfolio rebalancing reflects a value orientation. Portfolio managers do not have discretion with respect to the allocations determined by the RAE® methodology. The RAE® methodology is not updated according to any predetermined schedule and generally is not expected to be updated during a given year.

The Sub-Adviser provides investment advisory services in connection with the Fund's use of the RAE US Portfolio by, among other things, providing PIMCO, and the Portfolio Implementer where applicable, with the constituents and target weights in the RAE US Portfolio. The Fund seeks to remain invested in the securities that comprise the RAE US Portfolio even when the value of the RAE US Portfolio is declining.