v3.25.2
Investment Risks - PIMCO Mortgage-Backed Securities Active Exchange-Traded Fund
Mar. 31, 2025
Market Trading Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block] Market Trading Risk:  the risk that an active secondary trading market for Fund shares does not continue once developed, that the Fund may not continue to meet a listing exchange’s trading or listing requirements, that trading in Fund shares may be halted or become less liquid, or that Fund shares trade at prices other than the Fund’s net asset value and are subject to trading costs. These risks may be exacerbated if the creation/redemption process becomes less effective, particularly during times of market stress
Interest Rate Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block] Interest Rate Risk:  the risk that fixed income securities will fluctuate in value because of a change 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. Factors such as government policy, inflation, the economy, and market for bonds can impact interest rates and yields
Call Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block] 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 including 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 or may not realize the full anticipated earnings from the 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 [Member]  
Prospectus [Line Items]  
Risk [Text Block] Credit Risk:  the risk that the Fund could experience losses if the issuer or guarantor of a fixed income security, or the counterparty to a derivative contract, or the issuer or guarantor of collateral, is unable or unwilling, or is perceived (whether by market participants, rating agencies, pricing services or otherwise) as unable or unwilling, to meet its financial obligations
Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block] Market Risk:  the risk that the value of securities owned by the Fund may fluctuate, sometimes rapidly or unpredictably, due to factors affecting securities markets generally or particular industries
Issuer Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block] Issuer Risk:  the risk that the value of a security may decline for reasons related to the issuer, such as management performance, changes in financial condition or credit rating, financial leverage, reputation or reduced demand for the issuer’s goods or services
Liquidity Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block] Liquidity Risk:  the risk that a particular investment may be difficult to purchase or sell and that the Fund may be unable to sell investments at an advantageous time or price or achieve its desired level of exposure to a certain sector. Liquidity risk may result from the lack of an active market, reduced number and capacity of traditional market participants to make a market in fixed income securities, and may be magnified in a rising interest rate environment or other circumstances where investor redemptions from fixed income funds may be higher than normal, causing increased supply in the market due to selling activity
Mortgage Related and Other Asset Backed Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block] Mortgage-Related and Other Asset-Backed Securities Risk:  the risks of investing in mortgage-related and other asset-backed securities, including interest rate risk, extension risk, prepayment risk and credit risk. The Fund may invest in any tranche of mortgage-related and other asset-backed securities, including junior and/or equity tranches (to the extent consistent with the Fund's guidelines), which generally carry higher levels of the foregoing risks
Derivatives Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block] Derivatives Risk:  the risk of investing in derivative instruments (such as forwards, futures, options, swaps and structured securities) and other similar investments, including leverage, liquidity, interest rate, market, counterparty (including credit), operational, legal and management risks, and valuation complexity. Changes in the value of a derivative or other similar investment 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. Changes in the value of a derivative or other similar instrument may also create margin delivery or settlement payment obligations for the Fund. The Fund’s use of derivatives or other similar investments may result in losses to the Fund, a reduction in the Fund’s returns and/or increased volatility. Non-centrally-cleared over-the-counter (“OTC”) derivatives or other similar investments 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 non-centrally-cleared OTC derivatives or other similar investments. The primary credit risk on derivatives or other similar investments that are exchange-traded or traded through a central clearing counterparty resides with the Fund's clearing broker or the clearinghouse. Changes in regulation relating to a registered 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  or other similar investments and/or adversely affect the value of derivatives or other similar investments and the Fund’s performance
Call and Put Strategy Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block] Call and Put Strategy Risk:  The Fund may write calls and/or puts on instruments the Fund owns or otherwise has exposure to (covered calls or covered puts) or write calls and/or puts on instruments to which the Fund has no exposure (naked calls or naked puts) in return for a premium. The Fund may pursue such a strategy directly or within the structure of an asset-linked note (such as mortgage-linked notes that may count towards the Fund’s 80% policy). Under a call or put writing strategy (either directly or indirectly through an asset-linked note), the Fund typically would expect to receive cash (or a premium) for having written (sold) a call or put option, which enables a purchaser of the call to buy (or the purchaser of the put to sell) the asset on which the option is written at a certain price within a specified time frame. Writing call options will limit the Fund’s opportunity to profit from an increase in the market value and other returns of the underlying asset to the exercise price (plus the premium received). The Fund’s maximum potential gain via a written covered call will generally be expected to be the premium received from writing a covered call option plus the difference between any lower price at which the Fund acquired exposure to the applicable underlying asset and any higher price at which a purchaser of the call option may exercise the call option. The Fund’s maximum potential gain via a written naked call or any put will generally be the premium received from writing the option. The Fund’s maximum potential loss on a written covered call is the purchase price paid for the underlying asset minus the premium received for writing the option. The Fund’s maximum potential loss on a written uncovered call is theoretically limitless as the value of the underlying asset rises. The Fund’s maximum potential loss on a written put is the entire strike price minus the premium received for writing the option as the value of the underlying asset could fall to zero. Therefore, written calls and puts can result in overall losses and detract from the Fund’s total returns even though the call or put options produce premiums and may initially produce income and cash flow to the Fund (and distributions by the Fund) for having written the call or put options. Buying a call option or put option will generally involve the Fund paying a premium on the option, which may detract from returns and may not limit losses. The Fund may lose the initial amount invested in the call option or put option. When the Fund purchases an asset-linked note with call or put writing exposure embedded within it from a counterparty, the Fund is expected to receive exposure to the premium of the call or put option within the note (such as in the form of a coupon from the note). Therefore, these notes can provide recurring cash flow and income to the Fund based on the premiums that would be received from writing call or put options and this can be an important source of the Fund’s return, distributions and/or income. In a rising market, a covered call option may require an underlying instrument to be sold at an exercise price that is lower than would be received if the instrument was sold at the market price. If a call or put expires, the Fund would generally realize a gain in the amount of the premium received, but because there may have been a decline (unrealized loss) in the market value of the underlying instrument during the option period, the market value loss realized may exceed such gain. If the underlying instrument declines by more than the option premium the Fund receives, there will be a loss on the overall position, which will detract from the Fund’s total returns even if the call or put options written by the Fund produced premiums and initially produced Fund distributions, returns, income and/or cash flow. When the Fund purchases an asset-linked note with call or put buying exposure, such exposure and any premiums paid for the call or put option exposure will generally detract from returns and may not limit losses
Asset Linked Notes Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block] Asset-Linked Notes Risk:  asset-linked notes (including, but not limited to, interest rate-linked and/or mortgage-linked notes) are subject to the risk that investing in these instruments may be more costly to the Fund than if the Fund had invested in the asset(s) underlying the instrument directly. Asset-linked notes expose the Fund to the risks of the underlying asset(s). In addition, they are subject to certain structured products risks, such as issuer and counterparty risk. The Fund’s asset-linked note investments are subject to the risk that counterparties will fail to make payments when due or default completely. Prices of the Fund’s asset-linked note investments may be adversely affected if any of the issuers of the underlying asset(s) or counterparties to the asset-linked notes are subject to an actual or perceived deterioration in their credit quality. Should the prices of the asset underlying an asset-linked note move in an unexpected manner, the Fund may not achieve the anticipated benefits of an investment in an asset-linked note, and may realize losses, which could be significant and could include the Fund’s entire principal investment. There may be no established trading market for asset-linked notes, and they may constitute illiquid investments, which may make them difficult to sell and value. A lack of liquidity may also cause the value of an asset-linked note to decline. In addition, asset-linked notes may exhibit price behavior that does not correlate with the asset(s) underlying the instrument. Asset-linked notes may result in the Fund recognizing more taxable income in a given period than what would have been recognized from a direct investment in the underlying assets and/or increase Fund distributions at the expense of Fund returns and/or capital gains distributions
Basis Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block] Basis Risk:  basis risk exists when the price of a derivative position diverges from the price of the underlying instrument(s), and/or there is a mismatch between an asset and the derivative's reference asset(s), which may result in excess losses to the Fund. Under certain market conditions, it may not be economically feasible to initiate a transaction or liquidate a position in time to avoid a loss or take advantage of an opportunity
Equity Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block] Equity Risk:  the risk that the value of equity or equity-related securities, including 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 or equity-related securities generally have greater price volatility than fixed income securities. In addition, preferred securities may be subject to greater credit risk or other risks, such as risks related to deferred and omitted distributions, limited voting rights, liquidity, interest rates, regulatory changes and special redemption rights
Foreign Non US Investment Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block] 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, corporate governance and auditing standards, increased risk of delayed settlement of portfolio transactions or loss of certificates of portfolio securities, and the risk of unfavorable U.S. or foreign government actions, including nationalization, expropriation or confiscatory taxation, currency blockage, political changes, diplomatic developments, trade restrictions (including tariffs) or the imposition of sanctions and other similar measures. Foreign securities may also be less liquid and more difficult to value than securities of U.S. issuers
Emerging Markets Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block] Emerging Markets Risk:  the risk of investing in emerging market securities, primarily increased foreign (non-U.S.) investment risk
Leveraging Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block] 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. The use of leverage may also increase the Fund’s sensitivity to interest rate risks
Management Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block] Management Risk:  the risk that the investment techniques and risk analyses applied by PIMCO will not produce the desired results and that actual or potential conflicts of interest, legislative, regulatory or tax restrictions, policies or developments may affect the investment techniques available to PIMCO and the individual portfolio managers in connection with managing the Fund and may cause PIMCO to restrict or prohibit participation in certain investments. There is no guarantee that the investment objective of the Fund will be achieved
Short Exposure Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block] Short Exposure Risk:  the risk of entering into short sales or other short positions, 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 or other short position will not fulfill its contractual obligations, causing a loss to the Fund
Collateralized Loan Obligations Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block] Collateralized Loan Obligations Risk:  the risk that investing in collateralized loan obligations (“CLOs”) and other similarly structured investments exposes the Fund to heightened credit risk, interest rate risk, liquidity risk, market risk and prepayment and extension risk, as well as the risk of default on the underlying asset. In addition, investments in CLOs carry additional risks, including, but not limited to: (i) the possibility that distributions from collateral securities will not be adequate to make interest or other payments; (ii) the quality of the collateral may decline in value or default; (iii) risks related to the capability of the servicer of the securitized assets; (iv) the risk that the Fund may invest in tranches of CLOs that are subordinate to other tranches; (v) the structure and complexity of the transaction and the legal documents may not be fully understood at the time of investment and could lead to disputes with the issuer or among investors regarding the characterization of proceeds or unexpected investment results; and (vi) the CLO's manager may perform poorly
Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] It is possible to lose money on an investment in the Fund.
Risk Not Insured Depository Institution [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.