Fees and Expenses - Thornburg Premium Income Builder ETF |
May 22, 2026 |
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| Prospectus [Line Items] | ||||||||||||
| Expense Heading [Optional Text] | Fees and Expenses | |||||||||||
| Expense Narrative [Text Block] | This table describes the fees and expenses you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and Example below.
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| Other Expenses, New Fund, Based on Estimates [Text] | “Other Expenses” is an estimate based on the expenses the Fund expects to incur for its first full fiscal year. | |||||||||||
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) | |||||||||||
| Annual Fund Operating Expenses [Table] |
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| Expense Example [Heading] | Example | |||||||||||
| Expense Example Narrative [Text Block] | 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 (whether or not shares are sold or redeemed), that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The example does not take into account brokerage commissions and other fees to financial intermediaries that you may pay on your purchases and sales of shares of the Fund. It also does not include the transaction fees on purchases and redemptions of creation units (“Creation Units”), because those fees will not be imposed on retail investors. Although your actual costs may be higher or lower, based on these assumptions, your costs would, based on estimated Fund expenses, be:
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| Expense Example, With Redemption [Table] |
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| Portfolio Turnover [Heading] | Portfolio Turnover | |||||||||||
| Portfolio Turnover [Text Block] | 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 above, affect the Fund’s performance. Because the Fund had not commenced operations prior to the date of this prospectus, the Fund’s portfolio turnover rate for the most recent fiscal year end is not yet available.
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