Investment Risks - Principal Focused Blue Chip ETF	Jun. 09, 2025
Active Management Risk Member
Prospectus [Line Items]
Risk [Text Block]	Active Management Risk. The Fund's investments are actively managed by the investment team and do not track an index. Consequently, there is no guarantee that the investment techniques, analyses, or judgments that the Fund’s investment advisor and/or sub-advisor applies in making investment decisions for the Fund will produce the intended outcome or that the investments the advisor selects for the Fund will perform as well as other securities that were not selected for the Fund. The Fund may not achieve its investment objective, and it is not intended to be a complete investment program.
Equity Securities Risk Member
Prospectus [Line Items]
Risk [Text Block]	Equity Securities Risk. A variety of factors can negatively impact the value of equity securities held by a fund, including a decline in the issuer’s financial condition, unfavorable performance of the issuer’s sector or industry, or changes 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. •Growth Style Risk. Growth investing entails the risk that if growth companies do not increase their earnings at a rate expected by investors, the market price of their stock may decline significantly, even if earnings show an absolute increase. Growth company stocks also typically lack the dividend yield that can lessen price declines in market downturns.
Equity Securities Risk, Growth Style Risk Member
Prospectus [Line Items]
Risk [Text Block]	•Growth Style Risk. Growth investing entails the risk that if growth companies do not increase their earnings at a rate expected by investors, the market price of their stock may decline significantly, even if earnings show an absolute increase. Growth company stocks also typically lack the dividend yield that can lessen price declines in market downturns.
Financials Sector Risk Member
Prospectus [Line Items]
Risk [Text Block]	Financials Sector Risk. A fund that invests significantly in financial services companies may be more susceptible to adverse economic or regulatory occurrences affecting financial services companies. Financial companies may be adversely affected in certain market cycles, including periods of rising interest rates, which may restrict the availability and increase the cost of capital, and declining economic conditions, which may cause credit losses due to financial difficulties of borrowers. Because many types of financial companies are especially vulnerable to these economic cycles, the Fund’s investments in these companies may lose significant value during such periods.
Foreign Securities Risk Member
Prospectus [Line Items]
Risk [Text Block]	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).
Information Technology Sector Risk Member
Prospectus [Line Items]
Risk [Text Block]	Information Technology Sector Risk. Companies in the information technology sector may face dramatic and often unpredictable changes in growth rates and are particularly vulnerable to changes in technology product cycles, product obsolescence, government regulation, and competition, both domestically and internationally. Such companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability.
Market Trading Risks Member
Prospectus [Line Items]
Risk [Text Block]	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, a limited pool of 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.
Redemption And Large Transaction Risk Member
Prospectus [Line Items]
Risk [Text Block]	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 sell or purchase Fund shares in large quantities on the secondary market. These secondary market transactions may cause authorized participants to increase their purchases and redemptions of creation units from the Fund. Purchases and redemptions of creation units primarily with cash rather than through in-kind delivery of portfolio securities may cause the Fund to incur certain costs, such as brokerage costs or taxable gains or losses that it might not have incurred if it had made a redemption in kind. These costs could be imposed on the Fund and thus decrease its NAV to the extent that the costs are not offset by a transaction fee payable by an authorized participant.
Risk Lose Money [Member]
Prospectus [Line Items]
Risk [Text Block]	Many factors affect that value, and it is possible to lose money by investing 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.
Risk Nondiversified Status [Member]
Prospectus [Line Items]
Risk [Text Block]	Non-Diversification Risk. A non-diversified fund may invest a high percentage of its assets in the securities of a small number of issuers and is more likely than diversified funds to be significantly affected by a specific security’s poor performance.

Investment Risks - Principal Focused Blue Chip ETF

Jun. 09, 2025

Active Management Risk. The Fund's investments are actively managed by the investment team and do not track an index. Consequently, there is no guarantee that the investment techniques, analyses, or judgments that the Fund’s investment advisor and/or sub-advisor applies in making investment decisions for the Fund will produce the intended outcome or that the investments the advisor selects for the Fund will perform as well as other securities that were not selected for the Fund. The Fund may not achieve its investment objective, and it is not intended to be a complete investment program.

Prospectus [Line Items]

Risk [Text Block]

Equity Securities Risk. A variety of factors can negatively impact the value of equity securities held by a fund, including a decline in the issuer’s financial condition, unfavorable performance of the issuer’s sector or industry, or changes 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.

•Growth Style Risk. Growth investing entails the risk that if growth companies do not increase their earnings at a rate expected by investors, the market price of their stock may decline significantly, even if earnings show an absolute increase. Growth company stocks also typically lack the dividend yield that can lessen price declines in market downturns.

Equity Securities Risk, Growth Style Risk Member

Prospectus [Line Items]

Risk [Text Block]

Financials Sector Risk Member

Prospectus [Line Items]

Risk [Text Block]

Financials Sector Risk. A fund that invests significantly in financial services companies may be more susceptible to adverse economic or regulatory occurrences affecting financial services companies. Financial companies may be adversely affected in certain market cycles, including periods of rising interest rates, which may restrict the availability and increase the cost of capital, and declining economic conditions, which may cause credit losses due to financial difficulties of borrowers. Because many types of financial companies are especially vulnerable to these economic cycles, the Fund’s investments in these companies may lose significant value during such periods.

Foreign Securities Risk Member

Prospectus [Line Items]

Risk [Text Block]

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).

Information Technology Sector Risk Member

Prospectus [Line Items]

Risk [Text Block]

Information Technology Sector Risk. Companies in the information technology sector may face dramatic and often unpredictable changes in growth rates and are particularly vulnerable to changes in technology product cycles, product obsolescence, government regulation, and competition, both domestically and internationally. Such companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability.

Market Trading Risks Member

Prospectus [Line Items]

Risk [Text Block]

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, a limited pool of 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.

Redemption And Large Transaction Risk Member

Prospectus [Line Items]

Risk [Text Block]

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 sell or purchase Fund shares in large quantities on the secondary market. These secondary market transactions may cause authorized participants to increase their purchases and redemptions of creation units from the Fund. Purchases and redemptions of creation units primarily with cash rather than through in-kind delivery of portfolio securities may cause the Fund to incur certain costs, such as brokerage costs or taxable gains or losses that it might not have incurred if it had made a redemption in kind. These costs could be imposed on the Fund and thus decrease its NAV to the extent that the costs are not offset by a transaction fee payable by an authorized participant.

Risk Lose Money [Member]

Prospectus [Line Items]

Risk [Text Block]

Many factors affect that value, and it is possible to lose money by investing 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.

Risk Nondiversified Status [Member]

Prospectus [Line Items]

Risk [Text Block]

Non-Diversification Risk. A non-diversified fund may invest a high percentage of its assets in the securities of a small number of issuers and is more likely than diversified funds to be significantly affected by a specific security’s poor performance.