THE SECURITIES ACT OF 1933 | X |
Post-Effective Amendment No. 89 | X |
THE INVESTMENT COMPANY ACT OF 1940 | X |
Amendment No. 91 | X |
(Check Appropriate Box or Boxes) | |
Name and Address of Agent for Service: |
Britney L. Schnathorst |
Principal Financial Group |
Des Moines, IA 50392 |
____ | This post-effective amendment designates a new effective date for a previously filed post-effective amendment. |
SIGNATURES | |
Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Fund certifies that it meets all of the requirements for effectiveness of this registration statement under rule 485(b) under the Securities Act and has duly caused this registration statement to be signed on its behalf by the undersigned, duly authorized, in the city of Des Moines and State of Iowa, on the 11th day of July, 2019. | |
Principal Exchange-Traded Funds | |
(Registrant) | |
/s/ M. J. Beer _____________________________________ M. J. Beer Director, President and Chief Executive Officer | |
Attest: /s/ Beth Wilson ______________________________________ Beth Wilson Vice President and Secretary | |
Pursuant to the requirements of the Securities Act of 1933, this Amendment to the Registration Statement has been signed below by the following persons in the capacities and on the dates indicated. | |||
Signature | Title | Date | |
/s/ M. J. Beer __________________________ M. J. Beer | Director, President and Chief Executive Officer (Principal Executive Officer) | July 11, 2019 | |
/s/ T. W. Bollin __________________________ T. W. Bollin | Chief Financial Officer (Principal Financial Officer) | July 11, 2019 | |
/s/ S. L. Reece __________________________ S. L. Reece | Vice President and Controller (Controller) | July 11, 2019 | |
(E. Ballantine)* __________________________ E. Ballantine | Trustee | July 11, 2019 | |
(L. T. Barnes)* __________________________ L. T. Barnes | Trustee | July 11, 2019 | |
(C. Damos)* __________________________ C. Damos | Trustee | July 11, 2019 | |
(T. M. Dunbar)* __________________________ T. M. Dunbar | Trustee | July 11, 2019 | |
(M. A. Grimmett)* __________________________ M. A. Grimmett | Trustee | July 11, 2019 | |
(P. G. Halter)* __________________________ P. G. Halter | Trustee | July 11, 2019 | |
(F. S. Hirsch)* __________________________ F. S. Hirsch | Trustee | July 11, 2019 | |
(T. Huang)* __________________________ T. Huang | Trustee | July 11, 2019 | |
(K. McMillan)* __________________________ K. McMillan | Trustee | July 11, 2019 | |
(E. A. Nickels)* __________________________ E. A. Nickels | Trustee | July 11, 2019 | |
(M. M. VanDeWeghe)* __________________________ M. M. VanDeWeghe | Trustee | July 11, 2019 | |
* Pursuant to Power of Attorney appointing M. J. Beer Previously Filed as Ex-99(j)(ii) on February 6, 2015 (Accession No. 0001572661-15-000008), for E. A. Nickels on October 27, 2015 (Accession No. 0001572661-15-000049), for. P. G. Halter on January 19, 2018 (Accession No. 0001572661-18-000005), for M. M. VanDeWeghe on 08/31/2018 (Accession No. 0001572661-18-000128), and for T. M. Dunbar on 07/03/2019 (Accession No. 0001572661-19-000155). | |||
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| Principal Exchange-Traded Funds | Principal International Multi-Factor Core Index ETF | ||||||||||||||
| PRINCIPAL INTERNATIONAL MULTI-FACTOR CORE INDEX ETF | ||||||||||||||
| Objective: | ||||||||||||||
The Fund seeks to provide investment results that closely correspond, before expenses, to the performance of the Nasdaq Developed Select Leaders Core Index (the "Index"). | ||||||||||||||
| Fees and Expenses of the Fund | ||||||||||||||
This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund (“Shares”). Investors may pay brokerage commissions on their purchases and sales of Shares, which are not reflected in the table or the example below. | ||||||||||||||
| Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) | ||||||||||||||
| ||||||||||||||
| Example | ||||||||||||||
This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. | ||||||||||||||
| The Example assumes that you invest $10,000 in the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: | ||||||||||||||
| ||||||||||||||
| Portfolio Turnover | ||||||||||||||
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. This is a new fund and does not yet have a portfolio turnover rate to disclose. | ||||||||||||||
| Principal Investment Strategies | ||||||||||||||
Under normal circumstances, the Fund invests at least 80% of its net assets, plus any borrowings for investment purposes, in equity securities of companies that compose the Index at the time of purchase. The Index uses a quantitative model designed to identify equity securities of companies in the Nasdaq Developed Market Ex-US Ex-Korea Large Mid Cap Index (the "Parent Index") that exhibit potential for high degrees of sustainable shareholder value, growth and strong momentum. The Parent Index is composed of developed foreign market equity securities of issuers that have medium and large market capitalizations. The Index includes securities in the top 50% of the Parent Index by market capitalization, or (if not in the top 50% by market cap) the top 50% by rank (discussed below). To determine the rankings of securities in the bottom 50% by market cap, a currency-neutral approach is used (each currency maintains similar weight as the initial universe of stocks). Securities are ranked according to three factors:
The Index uses modified market-cap weighting to give greater weight to securities that rank higher. The Index is rebalanced semi-annually. Additionally, throughout the year securities that become ineligible for the Index are removed and not replaced. The Fund will make corresponding changes to its portfolio shortly after the Index changes are made public. As of March 31, 2019, the Index included 634 components, and the Parent Index included 1,174 components. More detailed information about the Index methodology is provided in the prospectus under Fund Account Information. The Fund employs a passive investment approach designed to attempt to track the performance of the Index. In seeking its objective, the Fund typically employs a "full replication" strategy which involves investing in all the securities that make up the Index, in the same approximate proportions as the Index. The Fund can, however, use a “sampling” methodology to purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The Fund can also purchase securities not included in the Index that the advisor believes will help the fund track the Index. The Fund will not concentrate its investments (invest more than 25% of its assets) in a particular industry except to the extent the Index is so concentrated. | ||||||||||||||
| Principal Risks | ||||||||||||||
The value of your investment in the Fund changes with the value of the Fund's investments. Many factors affect that value, and it is possible to lose money by 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. The principal risks of investing in the Fund, in alphabetical order, are: Equity Securities Risk. The value of equity securities could decline if the issuer’s financial condition declines or in response to overall market and economic conditions. A fund's principal market segment(s) (such as market capitalization or style) may underperform other market segments or the equity markets as a whole.
Foreign Currency Risk. Risks of investing in securities denominated in, or that trade in, foreign (non-U.S.) currencies include changes in foreign exchange rates and foreign exchange restrictions. Foreign Securities Risk. The risks of foreign securities include loss of value as a result of: political or economic instability; nationalization, expropriation or confiscatory taxation; settlement delays; and limited government regulation (including less stringent reporting, accounting, and disclosure standards than are required of U.S. companies). Index Fund Risk. An index fund has operating and other expenses while an index does not. As a result, over time, index funds tend to underperform the index. The correlation between fund performance and index performance may also be affected by the type of passive investment approach used by a fund (sampling or replication), changes in securities markets, changes in the composition of the index, and the timing of purchases and sales of fund shares. Industry Concentration Risk. A fund that concentrates investments in a particular industry or group of industries has greater exposure than other funds to market, economic and other factors affecting that industry or group of industries. Market Trading Risks. The Fund faces numerous market trading risks, including the potential lack of an active market for Fund shares, losses from trading in secondary markets, and disruption to the activities of market makers, authorized participants, or other participants and in the creation/redemption process of the Fund. ANY OF THESE FACTORS MAY LEAD TO THE FUND’S SHARES TRADING AT A PREMIUM OR DISCOUNT TO NAV. Momentum Style Risk. Stocks that previously exhibited high momentum characteristics may not experience positive momentum or may experience more volatility than the market as a whole. In addition, there may be periods when momentum style is out of favor, during which the investment performance of a Fund that uses momentum-based strategies may suffer. Redemption and Large Transaction Risk. Ownership of the fund's shares may be concentrated in one or a few large investors (such as funds of funds, institutional investors, and asset allocation programs) that may redeem or purchase shares in large quantities. These transactions may cause the fund to sell securities to meet redemptions or to invest additional cash at times it would not otherwise do so, which may result in increased transaction costs, increased expenses, changes to expense ratios, and adverse effects to fund performance. Such transactions may also accelerate the realization of taxable income if sales of portfolio securities result in gains. | ||||||||||||||
| Performance | ||||||||||||||
No performance information is shown because the Fund has not yet had a calendar year of performance. The Fund’s performance is benchmarked against the Nasdaq Developed Select Leaders Core Index. Performance information provides an indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information by calling 1-800-787-1621 or online at www.principaletfs.com. | ||||||||||||||
| Principal Exchange-Traded Funds | Principal U.S. Large-Cap Multi-Factor Core Index ETF | ||||||||||||||
| PRINCIPAL U.S. LARGE-CAP MULTI-FACTOR CORE INDEX ETF | ||||||||||||||
| Objective: | ||||||||||||||
The Fund seeks to provide investment results that closely correspond, before expenses, to the performance of the Nasdaq US Large Cap Select Leaders Core Index (the "Index"). | ||||||||||||||
| Fees and Expenses of the Fund | ||||||||||||||
This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund (“Shares”). Investors may pay brokerage commissions on their purchases and sales of Shares, which are not reflected in the table or the example below. | ||||||||||||||
| Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) | ||||||||||||||
| ||||||||||||||
| Example | ||||||||||||||
This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. | ||||||||||||||
| The Example assumes that you invest $10,000 in the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: | ||||||||||||||
| ||||||||||||||
| Portfolio Turnover | ||||||||||||||
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. This is a new fund and does not yet have a portfolio turnover rate to disclose. | ||||||||||||||
| Principal Investment Strategies | ||||||||||||||
Under normal circumstances, the Fund invests at least 80% of its net assets, plus any borrowings for investment purposes, in equity securities of U.S. companies with large market capitalizations that compose the Index at the time of purchase. The Index uses a quantitative model designed to identify equity securities of companies in the Nasdaq US Large Cap Index (the "Parent Index") that exhibit potential for high degrees of sustainable shareholder value, growth and strong momentum. The Parent Index is composed of equity securities of U.S. issuers with large market capitalizations. For this Fund, companies with large market capitalizations are those within the market capitalization range of the companies in the Parent Index, which as of March 31, 2019, was between approximately $6.4 billion and $850.9 billion. The Index includes securities in the top 50% of the Parent Index by market capitalization, or (if not in the top 50% by market cap) the top 33% by rank (discussed below). To determine the rankings of securities in the bottom 50% by market cap, an industry-neutral approach is used (each industry maintains similar weight as the initial universe of stocks). Securities are ranked according to three factors:
The Index uses modified market-cap weighting to give greater weight to securities that rank higher. The Index is rebalanced semi-annually. Additionally, throughout the year securities that become ineligible for the Index are removed and not replaced. The Fund will make corresponding changes to its portfolio shortly after the Index changes are made public. As of March 31 2019, the Index included 170 components, and the Parent Index included 444 components. More detailed information about the Index methodology is provided in the prospectus under Fund Account Information. The Fund employs a passive investment approach designed to attempt to track the performance of the Index. In seeking its objective, the Fund typically employs a "full replication" strategy which involves investing in all the securities that make up the Index, in the same approximate proportions as the Index. The Fund can, however, use a “sampling” methodology to purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The Fund can also purchase securities not included in the Index that the advisor believes will help the fund track the Index. The Fund will not concentrate its investments (invest more than 25% of its assets) in a particular industry except to the extent the Index is so concentrated. | ||||||||||||||
| Principal Risks | ||||||||||||||
The value of your investment in the Fund changes with the value of the Fund's investments. Many factors affect that value, and it is possible to lose money by 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. The principal risks of investing in the Fund, in alphabetical order, are: Equity Securities Risk. The value of equity securities could decline if the issuer’s financial condition declines or in response to overall market and economic conditions. A fund's principal market segment(s) (such as market capitalization or style) may underperform other market segments or the equity markets as a whole.
Index Fund Risk. An index fund has operating and other expenses while an index does not. As a result, over time, index funds tend to underperform the index. The correlation between fund performance and index performance may also be affected by the type of passive investment approach used by a fund (sampling or replication), changes in securities markets, changes in the composition of the index, and the timing of purchases and sales of fund shares. Industry Concentration Risk. A fund that concentrates investments in a particular industry or group of industries has greater exposure than other funds to market, economic and other factors affecting that industry or group of industries. Market Trading Risks. The Fund faces numerous market trading risks, including the potential lack of an active market for Fund shares, losses from trading in secondary markets, and disruption to the activities of market makers, authorized participants, or other participants and in the creation/redemption process of the Fund. ANY OF THESE FACTORS MAY LEAD TO THE FUND’S SHARES TRADING AT A PREMIUM OR DISCOUNT TO NAV. Momentum Style Risk. Stocks that previously exhibited high momentum characteristics may not experience positive momentum or may experience more volatility than the market as a whole. In addition, there may be periods when momentum style is out of favor, during which the investment performance of a Fund that uses momentum-based strategies may suffer. Redemption and Large Transaction Risk. Ownership of the fund's shares may be concentrated in one or a few large investors (such as funds of funds, institutional investors, and asset allocation programs) that may redeem or purchase shares in large quantities. These transactions may cause the fund to sell securities to meet redemptions or to invest additional cash at times it would not otherwise do so, which may result in increased transaction costs, increased expenses, changes to expense ratios, and adverse effects to fund performance. Such transactions may also accelerate the realization of taxable income if sales of portfolio securities result in gains. | ||||||||||||||
| Performance | ||||||||||||||
No performance information is shown because the Fund has not yet had a calendar year of performance. The Fund’s performance is benchmarked against the Nasdaq US Large Cap Select Leaders Core Index. Performance information provides an indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information by calling 1-800-787-1621 or online at www.principaletfs.com. | ||||||||||||||
| Principal Exchange-Traded Funds | Principal U.S. Small-MidCap Multi-Factor Core Index ETF | ||||||||||||||
| PRINCIPAL U.S. SMALL-MIDCAP MULTI-FACTOR CORE INDEX ETF | ||||||||||||||
| Objective: | ||||||||||||||
The Fund seeks to provide investment results that closely correspond, before expenses, to the performance of the Nasdaq US Small Mid Cap Select Leaders Core Index (the "Index"). | ||||||||||||||
| Fees and Expenses of the Fund | ||||||||||||||
This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund (“Shares”). Investors may pay brokerage commissions on their purchases and sales of Shares, which are not reflected in the table or the example below. | ||||||||||||||
| Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) | ||||||||||||||
| ||||||||||||||
| Example | ||||||||||||||
This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. | ||||||||||||||
| The Example assumes that you invest $10,000 in the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: | ||||||||||||||
| ||||||||||||||
| Portfolio Turnover | ||||||||||||||
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. This is a new fund and does not yet have a portfolio turnover rate to disclose. | ||||||||||||||
| Principal Investment Strategies | ||||||||||||||
Under normal circumstances, the Fund invests at least 80% of its net assets, plus any borrowings for investment purposes, in equity securities of U.S. companies with small- to medium-market capitalizations that compose the Index at the time of purchase. The Index uses a quantitative model designed to identify equity securities of companies in the Nasdaq US Small Cap Index and Nasdaq US Mid Cap Index (the "Parent Indexes") that exhibit potential for high degrees of sustainable shareholder value, growth and strong momentum. The Parent Indexes are composed of equity securities of issuers with small- to medium-market capitalizations. For this Fund, companies with small- to medium-market capitalizations are those within the market capitalization range of the companies comprising the Parent Indexes collectively, which as of March 31, 2019, was between approximately $50 million and $12.5 billion. The Index includes securities that are in the top 90% of the Parent Indexes by three month average daily dollar trading volume, and the top 20% of the final rank in the current valuation (or top 50% if included in the Index in the prior period) (as described below). Securities are ranked according to three factors:
The portfolio is constructed using a industry-neutral approach (each industry maintains similar weight as the initial universe of stocks). Securities are weighted by their liquidity-volatility score, in an effort to give greater weight to securities that are more liquid and less volatile. The Index is rebalanced semi-annually. Additionally, throughout the year securities that become ineligible for the Index are removed and not replaced. The Fund will make corresponding changes to its portfolio shortly after Index changes are made public. As of March 31, 2019, the Index included 603 components, and the Parent Indexes collectively included 2,404 components. More detailed information about the Index methodology is provided in the prospectus under Fund Account Information. The Fund employs a passive investment approach designed to attempt to track the performance of the Index. In seeking its objective, the Fund typically employs a "full replication" strategy which involves investing in all the securities that make up the Index, in the same approximate proportions as the Index. The Fund can, however, use a “sampling” methodology to purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The Fund can also invest in securities not included in the Index that the advisor believes will help the fund track the Index. The Fund will not concentrate (invest more than 25% of its assets) its investments in a particular industry except to the extent the Index is so concentrated. | ||||||||||||||
| Principal Risks | ||||||||||||||
The value of your investment in the Fund changes with the value of the Fund's investments. Many factors affect that value, and it is possible to lose money by 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. The principal risks of investing in the Fund, in alphabetical order, are: Equity Securities Risk. The value of equity securities could decline if the issuer’s financial condition declines or in response to overall market and economic conditions. A fund's principal market segment(s) (such as market capitalization or style) may underperform other market segments or the equity markets as a whole.
Index Fund Risk. An index fund has operating and other expenses while an index does not. As a result, over time, index funds tend to underperform the index. The correlation between fund performance and index performance may also be affected by the type of passive investment approach used by a fund (sampling or replication), changes in securities markets, changes in the composition of the index, and the timing of purchases and sales of fund shares. Industry Concentration Risk. A fund that concentrates investments in a particular industry or group of industries has greater exposure than other funds to market, economic and other factors affecting that industry or group of industries. Market Trading Risks. The Fund faces numerous market trading risks, including the potential lack of an active market for Fund shares, losses from trading in secondary markets, and disruption to the activities of market makers, authorized participants, or other participants and in the creation/redemption process of the Fund. ANY OF THESE FACTORS MAY LEAD TO THE FUND’S SHARES TRADING AT A PREMIUM OR DISCOUNT TO NAV. Momentum Style Risk. Stocks that previously exhibited high momentum characteristics may not experience positive momentum or may experience more volatility than the market as a whole. In addition, there may be periods when momentum style is out of favor, during which the investment performance of a Fund that uses momentum-based strategies may suffer. Redemption and Large Transaction Risk. Ownership of the fund's shares may be concentrated in one or a few large investors (such as funds of funds, institutional investors, and asset allocation programs) that may redeem or purchase shares in large quantities. These transactions may cause the fund to sell securities to meet redemptions or to invest additional cash at times it would not otherwise do so, which may result in increased transaction costs, increased expenses, changes to expense ratios, and adverse effects to fund performance. Such transactions may also accelerate the realization of taxable income if sales of portfolio securities result in gains. | ||||||||||||||
| Performance | ||||||||||||||
No performance information is shown because the Fund has not yet had a calendar year of performance. The Fund’s performance is benchmarked against the Nasdaq US Small Mid Cap Select Leaders Core Index. Performance information provides an indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information by calling 1-800-787-1621 or online at www.principaletfs.com. | ||||||||||||||
| Label | Element | Value | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Prospectus: | rr_ProspectusTable | ||||||||||||||
| Document Type | dei_DocumentType | 485BPOS | |||||||||||||
| Document Period End Date | dei_DocumentPeriodEndDate | Jun. 30, 2019 | |||||||||||||
| Entity Registrant Name | dei_EntityRegistrantName | Principal Exchange-Traded Funds | |||||||||||||
| Central Index Key | dei_EntityCentralIndexKey | 0001572661 | |||||||||||||
| Amendment Flag | dei_AmendmentFlag | false | |||||||||||||
| Document Creation Date | dei_DocumentCreationDate | Jul. 03, 2019 | |||||||||||||
| Document Effective Date | dei_DocumentEffectiveDate | Jul. 06, 2019 | |||||||||||||
| Prospectus Date | rr_ProspectusDate | Jul. 06, 2019 | |||||||||||||
| Principal Exchange-Traded Funds | Principal International Multi-Factor Core Index ETF | |||||||||||||||
| Prospectus: | rr_ProspectusTable | ||||||||||||||
| Risk/Return [Heading] | rr_RiskReturnHeading | PRINCIPAL INTERNATIONAL MULTI-FACTOR CORE INDEX ETF | |||||||||||||
| Objective [Heading] | rr_ObjectiveHeading | Objective: | |||||||||||||
| Objective, Primary [Text Block] | rr_ObjectivePrimaryTextBlock | The Fund seeks to provide investment results that closely correspond, before expenses, to the performance of the Nasdaq Developed Select Leaders Core Index (the "Index"). |
|||||||||||||
| Expense [Heading] | rr_ExpenseHeading | Fees and Expenses of the Fund | |||||||||||||
| 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 (“Shares”). Investors may pay brokerage commissions on their purchases and sales of Shares, which are not reflected in the table or the example below. |
|||||||||||||
| 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) | |||||||||||||
| Portfolio Turnover [Heading] | rr_PortfolioTurnoverHeading | Portfolio Turnover | |||||||||||||
| Portfolio Turnover [Text Block] | rr_PortfolioTurnoverTextBlock | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. This is a new fund and does not yet have a portfolio turnover rate to disclose. |
|||||||||||||
| Expense Example [Heading] | rr_ExpenseExampleHeading | Example | |||||||||||||
| Expense Example Narrative [Text Block] | rr_ExpenseExampleNarrativeTextBlock | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. |
|||||||||||||
| Expense Example by, Year, Caption [Text] | rr_ExpenseExampleByYearCaption | The Example assumes that you invest $10,000 in the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: | |||||||||||||
| Strategy [Heading] | rr_StrategyHeading | Principal Investment Strategies | |||||||||||||
| Strategy Narrative [Text Block] | rr_StrategyNarrativeTextBlock | Under normal circumstances, the Fund invests at least 80% of its net assets, plus any borrowings for investment purposes, in equity securities of companies that compose the Index at the time of purchase. The Index uses a quantitative model designed to identify equity securities of companies in the Nasdaq Developed Market Ex-US Ex-Korea Large Mid Cap Index (the "Parent Index") that exhibit potential for high degrees of sustainable shareholder value, growth and strong momentum. The Parent Index is composed of developed foreign market equity securities of issuers that have medium and large market capitalizations. The Index includes securities in the top 50% of the Parent Index by market capitalization, or (if not in the top 50% by market cap) the top 50% by rank (discussed below). To determine the rankings of securities in the bottom 50% by market cap, a currency-neutral approach is used (each currency maintains similar weight as the initial universe of stocks). Securities are ranked according to three factors:
The Index uses modified market-cap weighting to give greater weight to securities that rank higher. The Index is rebalanced semi-annually. Additionally, throughout the year securities that become ineligible for the Index are removed and not replaced. The Fund will make corresponding changes to its portfolio shortly after the Index changes are made public. As of March 31, 2019, the Index included 634 components, and the Parent Index included 1,174 components. More detailed information about the Index methodology is provided in the prospectus under Fund Account Information. The Fund employs a passive investment approach designed to attempt to track the performance of the Index. In seeking its objective, the Fund typically employs a "full replication" strategy which involves investing in all the securities that make up the Index, in the same approximate proportions as the Index. The Fund can, however, use a “sampling” methodology to purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The Fund can also purchase securities not included in the Index that the advisor believes will help the fund track the Index. The Fund will not concentrate its investments (invest more than 25% of its assets) in a particular industry except to the extent the Index is so concentrated. |
|||||||||||||
| Risk [Heading] | rr_RiskHeading | Principal Risks | |||||||||||||
| Risk Narrative [Text Block] | rr_RiskNarrativeTextBlock | The value of your investment in the Fund changes with the value of the Fund's investments. Many factors affect that value, and it is possible to lose money by 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. The principal risks of investing in the Fund, in alphabetical order, are: Equity Securities Risk. The value of equity securities could decline if the issuer’s financial condition declines or in response to overall market and economic conditions. A fund's principal market segment(s) (such as market capitalization or style) may underperform other market segments or the equity markets as a whole.
Foreign Currency Risk. Risks of investing in securities denominated in, or that trade in, foreign (non-U.S.) currencies include changes in foreign exchange rates and foreign exchange restrictions. Foreign Securities Risk. The risks of foreign securities include loss of value as a result of: political or economic instability; nationalization, expropriation or confiscatory taxation; settlement delays; and limited government regulation (including less stringent reporting, accounting, and disclosure standards than are required of U.S. companies). Index Fund Risk. An index fund has operating and other expenses while an index does not. As a result, over time, index funds tend to underperform the index. The correlation between fund performance and index performance may also be affected by the type of passive investment approach used by a fund (sampling or replication), changes in securities markets, changes in the composition of the index, and the timing of purchases and sales of fund shares. Industry Concentration Risk. A fund that concentrates investments in a particular industry or group of industries has greater exposure than other funds to market, economic and other factors affecting that industry or group of industries. Market Trading Risks. The Fund faces numerous market trading risks, including the potential lack of an active market for Fund shares, losses from trading in secondary markets, and disruption to the activities of market makers, authorized participants, or other participants and in the creation/redemption process of the Fund. ANY OF THESE FACTORS MAY LEAD TO THE FUND’S SHARES TRADING AT A PREMIUM OR DISCOUNT TO NAV. Momentum Style Risk. Stocks that previously exhibited high momentum characteristics may not experience positive momentum or may experience more volatility than the market as a whole. In addition, there may be periods when momentum style is out of favor, during which the investment performance of a Fund that uses momentum-based strategies may suffer. Redemption and Large Transaction Risk. Ownership of the fund's shares may be concentrated in one or a few large investors (such as funds of funds, institutional investors, and asset allocation programs) that may redeem or purchase shares in large quantities. These transactions may cause the fund to sell securities to meet redemptions or to invest additional cash at times it would not otherwise do so, which may result in increased transaction costs, increased expenses, changes to expense ratios, and adverse effects to fund performance. Such transactions may also accelerate the realization of taxable income if sales of portfolio securities result in gains. |
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| Risk Lose Money [Text] | rr_RiskLoseMoney | Many factors affect that value, and it is possible to lose money by investing in the Fund. | |||||||||||||
| 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. | |||||||||||||
| Bar Chart and Performance Table [Heading] | rr_BarChartAndPerformanceTableHeading | Performance | |||||||||||||
| Performance Narrative [Text Block] | rr_PerformanceNarrativeTextBlock | No performance information is shown because the Fund has not yet had a calendar year of performance. The Fund’s performance is benchmarked against the Nasdaq Developed Select Leaders Core Index. Performance information provides an indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information by calling 1-800-787-1621 or online at www.principaletfs.com. |
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| Performance One Year or Less [Text] | rr_PerformanceOneYearOrLess | No performance information is shown because the Fund has not yet had a calendar year of performance. | |||||||||||||
| Performance Availability Phone [Text] | rr_PerformanceAvailabilityPhone | 1-800-787-1621 | |||||||||||||
| Performance Availability Website Address [Text] | rr_PerformanceAvailabilityWebSiteAddress | www.principaletfs.com | |||||||||||||
| Performance Past Does Not Indicate Future [Text] | rr_PerformancePastDoesNotIndicateFuture | Performance information provides an indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||
| Principal Exchange-Traded Funds | Principal International Multi-Factor Core Index ETF | Principal International Multi-Factor Core Index ETF | |||||||||||||||
| Prospectus: | rr_ProspectusTable | ||||||||||||||
| Trading Symbol | dei_TradingSymbol | PDEV | |||||||||||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.25% | |||||||||||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | none | |||||||||||||
| Net Expenses (as a percentage of Assets) | rr_NetExpensesOverAssets | 0.25% | [1] | ||||||||||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 26 | |||||||||||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | $ 80 | |||||||||||||
| Principal Exchange-Traded Funds | Principal U.S. Large-Cap Multi-Factor Core Index ETF | |||||||||||||||
| Prospectus: | rr_ProspectusTable | ||||||||||||||
| Risk/Return [Heading] | rr_RiskReturnHeading | PRINCIPAL U.S. LARGE-CAP MULTI-FACTOR CORE INDEX ETF | |||||||||||||
| Objective [Heading] | rr_ObjectiveHeading | Objective: | |||||||||||||
| Objective, Primary [Text Block] | rr_ObjectivePrimaryTextBlock | The Fund seeks to provide investment results that closely correspond, before expenses, to the performance of the Nasdaq US Large Cap Select Leaders Core Index (the "Index"). |
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| Expense [Heading] | rr_ExpenseHeading | Fees and Expenses of the Fund | |||||||||||||
| 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 (“Shares”). Investors may pay brokerage commissions on their purchases and sales of Shares, which are not reflected in the table or the example below. |
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| 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) | |||||||||||||
| Portfolio Turnover [Heading] | rr_PortfolioTurnoverHeading | Portfolio Turnover | |||||||||||||
| Portfolio Turnover [Text Block] | rr_PortfolioTurnoverTextBlock | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. This is a new fund and does not yet have a portfolio turnover rate to disclose. |
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| Expense Example [Heading] | rr_ExpenseExampleHeading | Example | |||||||||||||
| Expense Example Narrative [Text Block] | rr_ExpenseExampleNarrativeTextBlock | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. |
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| Expense Example by, Year, Caption [Text] | rr_ExpenseExampleByYearCaption | The Example assumes that you invest $10,000 in the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The calculation of costs takes into account contractual fee waivers and/or expense reimbursements for the period noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be: | |||||||||||||
| Strategy [Heading] | rr_StrategyHeading | Principal Investment Strategies | |||||||||||||
| Strategy Narrative [Text Block] | rr_StrategyNarrativeTextBlock | Under normal circumstances, the Fund invests at least 80% of its net assets, plus any borrowings for investment purposes, in equity securities of U.S. companies with large market capitalizations that compose the Index at the time of purchase. The Index uses a quantitative model designed to identify equity securities of companies in the Nasdaq US Large Cap Index (the "Parent Index") that exhibit potential for high degrees of sustainable shareholder value, growth and strong momentum. The Parent Index is composed of equity securities of U.S. issuers with large market capitalizations. For this Fund, companies with large market capitalizations are those within the market capitalization range of the companies in the Parent Index, which as of March 31, 2019, was between approximately $6.4 billion and $850.9 billion. The Index includes securities in the top 50% of the Parent Index by market capitalization, or (if not in the top 50% by market cap) the top 33% by rank (discussed below). To determine the rankings of securities in the bottom 50% by market cap, an industry-neutral approach is used (each industry maintains similar weight as the initial universe of stocks). Securities are ranked according to three factors:
The Index uses modified market-cap weighting to give greater weight to securities that rank higher. The Index is rebalanced semi-annually. Additionally, throughout the year securities that become ineligible for the Index are removed and not replaced. The Fund will make corresponding changes to its portfolio shortly after the Index changes are made public. As of March 31 2019, the Index included 170 components, and the Parent Index included 444 components. More detailed information about the Index methodology is provided in the prospectus under Fund Account Information. The Fund employs a passive investment approach designed to attempt to track the performance of the Index. In seeking its objective, the Fund typically employs a "full replication" strategy which involves investing in all the securities that make up the Index, in the same approximate proportions as the Index. The Fund can, however, use a “sampling” methodology to purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The Fund can also purchase securities not included in the Index that the advisor believes will help the fund track the Index. The Fund will not concentrate its investments (invest more than 25% of its assets) in a particular industry except to the extent the Index is so concentrated. |
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| Risk [Heading] | rr_RiskHeading | Principal Risks | |||||||||||||
| Risk Narrative [Text Block] | rr_RiskNarrativeTextBlock | The value of your investment in the Fund changes with the value of the Fund's investments. Many factors affect that value, and it is possible to lose money by 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. The principal risks of investing in the Fund, in alphabetical order, are: Equity Securities Risk. The value of equity securities could decline if the issuer’s financial condition declines or in response to overall market and economic conditions. A fund's principal market segment(s) (such as market capitalization or style) may underperform other market segments or the equity markets as a whole.
Index Fund Risk. An index fund has operating and other expenses while an index does not. As a result, over time, index funds tend to underperform the index. The correlation between fund performance and index performance may also be affected by the type of passive investment approach used by a fund (sampling or replication), changes in securities markets, changes in the composition of the index, and the timing of purchases and sales of fund shares. Industry Concentration Risk. A fund that concentrates investments in a particular industry or group of industries has greater exposure than other funds to market, economic and other factors affecting that industry or group of industries. Market Trading Risks. The Fund faces numerous market trading risks, including the potential lack of an active market for Fund shares, losses from trading in secondary markets, and disruption to the activities of market makers, authorized participants, or other participants and in the creation/redemption process of the Fund. ANY OF THESE FACTORS MAY LEAD TO THE FUND’S SHARES TRADING AT A PREMIUM OR DISCOUNT TO NAV. Momentum Style Risk. Stocks that previously exhibited high momentum characteristics may not experience positive momentum or may experience more volatility than the market as a whole. In addition, there may be periods when momentum style is out of favor, during which the investment performance of a Fund that uses momentum-based strategies may suffer. Redemption and Large Transaction Risk. Ownership of the fund's shares may be concentrated in one or a few large investors (such as funds of funds, institutional investors, and asset allocation programs) that may redeem or purchase shares in large quantities. These transactions may cause the fund to sell securities to meet redemptions or to invest additional cash at times it would not otherwise do so, which may result in increased transaction costs, increased expenses, changes to expense ratios, and adverse effects to fund performance. Such transactions may also accelerate the realization of taxable income if sales of portfolio securities result in gains. |
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| Risk Lose Money [Text] | rr_RiskLoseMoney | Many factors affect that value, and it is possible to lose money by investing in the Fund. | |||||||||||||
| 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. | |||||||||||||
| Bar Chart and Performance Table [Heading] | rr_BarChartAndPerformanceTableHeading | Performance | |||||||||||||
| Performance Narrative [Text Block] | rr_PerformanceNarrativeTextBlock | No performance information is shown because the Fund has not yet had a calendar year of performance. The Fund’s performance is benchmarked against the Nasdaq US Large Cap Select Leaders Core Index. Performance information provides an indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information by calling 1-800-787-1621 or online at www.principaletfs.com. |
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| Performance One Year or Less [Text] | rr_PerformanceOneYearOrLess | No performance information is shown because the Fund has not yet had a calendar year of performance. | |||||||||||||
| Performance Availability Phone [Text] | rr_PerformanceAvailabilityPhone | 1-800-787-1621 | |||||||||||||
| Performance Availability Website Address [Text] | rr_PerformanceAvailabilityWebSiteAddress | www.principaletfs.com | |||||||||||||
| Performance Past Does Not Indicate Future [Text] | rr_PerformancePastDoesNotIndicateFuture | Performance information provides an indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||
| Principal Exchange-Traded Funds | Principal U.S. Large-Cap Multi-Factor Core Index ETF | Principal U.S. Large-Cap Multi-Factor Core Index ETF | |||||||||||||||
| Prospectus: | rr_ProspectusTable | ||||||||||||||
| Trading Symbol | dei_TradingSymbol | PLC | |||||||||||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.15% | |||||||||||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | none | |||||||||||||
| Net Expenses (as a percentage of Assets) | rr_NetExpensesOverAssets | 0.15% | [2] | ||||||||||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 15 | |||||||||||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | $ 48 | |||||||||||||
| Principal Exchange-Traded Funds | Principal U.S. Small-MidCap Multi-Factor Core Index ETF | |||||||||||||||
| Prospectus: | rr_ProspectusTable | ||||||||||||||
| Risk/Return [Heading] | rr_RiskReturnHeading | PRINCIPAL U.S. SMALL-MIDCAP MULTI-FACTOR CORE INDEX ETF | |||||||||||||
| Objective [Heading] | rr_ObjectiveHeading | Objective: | |||||||||||||
| Objective, Primary [Text Block] | rr_ObjectivePrimaryTextBlock | The Fund seeks to provide investment results that closely correspond, before expenses, to the performance of the Nasdaq US Small Mid Cap Select Leaders Core Index (the "Index"). |
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| Expense [Heading] | rr_ExpenseHeading | Fees and Expenses of the Fund | |||||||||||||
| 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 (“Shares”). Investors may pay brokerage commissions on their purchases and sales of Shares, which are not reflected in the table or the example below. |
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| 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) | |||||||||||||
| Portfolio Turnover [Heading] | rr_PortfolioTurnoverHeading | Portfolio Turnover | |||||||||||||
| Portfolio Turnover [Text Block] | rr_PortfolioTurnoverTextBlock | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. This is a new fund and does not yet have a portfolio turnover rate to disclose. |
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| Expense Example [Heading] | rr_ExpenseExampleHeading | Example | |||||||||||||
| Expense Example Narrative [Text Block] | rr_ExpenseExampleNarrativeTextBlock | This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. |
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| Expense Example by, Year, Caption [Text] | rr_ExpenseExampleByYearCaption | The Example assumes that you invest $10,000 in the Fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: | |||||||||||||
| Strategy [Heading] | rr_StrategyHeading | Principal Investment Strategies | |||||||||||||
| Strategy Narrative [Text Block] | rr_StrategyNarrativeTextBlock | Under normal circumstances, the Fund invests at least 80% of its net assets, plus any borrowings for investment purposes, in equity securities of U.S. companies with small- to medium-market capitalizations that compose the Index at the time of purchase. The Index uses a quantitative model designed to identify equity securities of companies in the Nasdaq US Small Cap Index and Nasdaq US Mid Cap Index (the "Parent Indexes") that exhibit potential for high degrees of sustainable shareholder value, growth and strong momentum. The Parent Indexes are composed of equity securities of issuers with small- to medium-market capitalizations. For this Fund, companies with small- to medium-market capitalizations are those within the market capitalization range of the companies comprising the Parent Indexes collectively, which as of March 31, 2019, was between approximately $50 million and $12.5 billion. The Index includes securities that are in the top 90% of the Parent Indexes by three month average daily dollar trading volume, and the top 20% of the final rank in the current valuation (or top 50% if included in the Index in the prior period) (as described below). Securities are ranked according to three factors:
The portfolio is constructed using a industry-neutral approach (each industry maintains similar weight as the initial universe of stocks). Securities are weighted by their liquidity-volatility score, in an effort to give greater weight to securities that are more liquid and less volatile. The Index is rebalanced semi-annually. Additionally, throughout the year securities that become ineligible for the Index are removed and not replaced. The Fund will make corresponding changes to its portfolio shortly after Index changes are made public. As of March 31, 2019, the Index included 603 components, and the Parent Indexes collectively included 2,404 components. More detailed information about the Index methodology is provided in the prospectus under Fund Account Information. The Fund employs a passive investment approach designed to attempt to track the performance of the Index. In seeking its objective, the Fund typically employs a "full replication" strategy which involves investing in all the securities that make up the Index, in the same approximate proportions as the Index. The Fund can, however, use a “sampling” methodology to purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The Fund can also invest in securities not included in the Index that the advisor believes will help the fund track the Index. The Fund will not concentrate (invest more than 25% of its assets) its investments in a particular industry except to the extent the Index is so concentrated. |
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| Risk [Heading] | rr_RiskHeading | Principal Risks | |||||||||||||
| Risk Narrative [Text Block] | rr_RiskNarrativeTextBlock | The value of your investment in the Fund changes with the value of the Fund's investments. Many factors affect that value, and it is possible to lose money by 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. The principal risks of investing in the Fund, in alphabetical order, are: Equity Securities Risk. The value of equity securities could decline if the issuer’s financial condition declines or in response to overall market and economic conditions. A fund's principal market segment(s) (such as market capitalization or style) may underperform other market segments or the equity markets as a whole.
Index Fund Risk. An index fund has operating and other expenses while an index does not. As a result, over time, index funds tend to underperform the index. The correlation between fund performance and index performance may also be affected by the type of passive investment approach used by a fund (sampling or replication), changes in securities markets, changes in the composition of the index, and the timing of purchases and sales of fund shares. Industry Concentration Risk. A fund that concentrates investments in a particular industry or group of industries has greater exposure than other funds to market, economic and other factors affecting that industry or group of industries. Market Trading Risks. The Fund faces numerous market trading risks, including the potential lack of an active market for Fund shares, losses from trading in secondary markets, and disruption to the activities of market makers, authorized participants, or other participants and in the creation/redemption process of the Fund. ANY OF THESE FACTORS MAY LEAD TO THE FUND’S SHARES TRADING AT A PREMIUM OR DISCOUNT TO NAV. Momentum Style Risk. Stocks that previously exhibited high momentum characteristics may not experience positive momentum or may experience more volatility than the market as a whole. In addition, there may be periods when momentum style is out of favor, during which the investment performance of a Fund that uses momentum-based strategies may suffer. Redemption and Large Transaction Risk. Ownership of the fund's shares may be concentrated in one or a few large investors (such as funds of funds, institutional investors, and asset allocation programs) that may redeem or purchase shares in large quantities. These transactions may cause the fund to sell securities to meet redemptions or to invest additional cash at times it would not otherwise do so, which may result in increased transaction costs, increased expenses, changes to expense ratios, and adverse effects to fund performance. Such transactions may also accelerate the realization of taxable income if sales of portfolio securities result in gains. |
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| Risk Lose Money [Text] | rr_RiskLoseMoney | Many factors affect that value, and it is possible to lose money by investing in the Fund. | |||||||||||||
| 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. | |||||||||||||
| Bar Chart and Performance Table [Heading] | rr_BarChartAndPerformanceTableHeading | Performance | |||||||||||||
| Performance Narrative [Text Block] | rr_PerformanceNarrativeTextBlock | No performance information is shown because the Fund has not yet had a calendar year of performance. The Fund’s performance is benchmarked against the Nasdaq US Small Mid Cap Select Leaders Core Index. Performance information provides an indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. You may get updated performance information by calling 1-800-787-1621 or online at www.principaletfs.com. |
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| Performance One Year or Less [Text] | rr_PerformanceOneYearOrLess | No performance information is shown because the Fund has not yet had a calendar year of performance. | |||||||||||||
| Performance Availability Phone [Text] | rr_PerformanceAvailabilityPhone | 1-800-787-1621 | |||||||||||||
| Performance Availability Website Address [Text] | rr_PerformanceAvailabilityWebSiteAddress | www.principaletfs.com | |||||||||||||
| Performance Past Does Not Indicate Future [Text] | rr_PerformancePastDoesNotIndicateFuture | Performance information provides an indication of the risks of investing in the Fund. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. | |||||||||||||
| Principal Exchange-Traded Funds | Principal U.S. Small-MidCap Multi-Factor Core Index ETF | Principal U.S. Small-MidCap Multi-Factor Core Index ETF | |||||||||||||||
| Prospectus: | rr_ProspectusTable | ||||||||||||||
| Trading Symbol | dei_TradingSymbol | PSM | |||||||||||||
| Management Fees (as a percentage of Assets) | rr_ManagementFeesOverAssets | 0.20% | |||||||||||||
| Other Expenses (as a percentage of Assets): | rr_OtherExpensesOverAssets | none | |||||||||||||
| Net Expenses (as a percentage of Assets) | rr_NetExpensesOverAssets | 0.20% | [3] | ||||||||||||
| Expense Example, with Redemption, 1 Year | rr_ExpenseExampleYear01 | $ 20 | |||||||||||||
| Expense Example, with Redemption, 3 Years | rr_ExpenseExampleYear03 | $ 64 | |||||||||||||
| |||||||||||||||
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