In seeking to maximize total return while also generating income and preserving capital, the Fund will normally invest at least 80% of its assets in debt securities (commonly referred to as “bonds”) of varying maturity, duration, and quality. These debt securities may include U.S. and non-U.S. corporate debt securities, U.S. government debt securities, including Treasury Inflation Protected Bond Securities and zero-coupon securities, non-U.S. government debt securities, emerging-market debt securities, and mortgage-backed and asset-backed securities. To meet its objective, the Fund may invest in investment companies such as ETFs, which could represent a significant percentage of assets.

The Fund invests primarily in investment-grade fixed-income securities. The Fund may also invest up to 20% of its assets in fixed-income securities that are rated below investment grade (commonly known as junk bonds), or if unrated, are determined by the Fund’s subadviser(s) to be of comparable quality.

In addition, the Fund may invest in collateralized debt obligations (CDOs), which may include collateralized loan obligations (CLOs). CDOs are types of asset-backed securities. CLOs are ordinarily issued by a trust or other special purpose entity and are typically collateralized by a pool of loans, which may include, among others, domestic and non‑U.S. senior secured loans, senior unsecured loans, and subordinate corporate loans, including loans that may be rated below investment grade or equivalent unrated loans, held by such issuer.

The Fund may invest up to 10% of its assets in securities denominated in foreign currencies. The Fund may also invest in securities acquired in a private placement, such as Rule 144A securities, as well as derivatives, including options, futures, swaps, and forward foreign currency contracts, for risk management purposes or as part of its investment strategies. Derivatives instruments that provide investment exposure to investments in the Fund’s 80% investment policy and derivatives instruments that provide investment exposure to one or more of the market risk factors associated with such securities may be counted towards the Fund’s 80% investment

policy. The Fund may also enter into reverse repurchase agreements and dollar rolls. The Fund may also invest in short-term, high-quality fixed-income securities, cash or cash equivalents, including money market funds.

The nature of the strategies in this Fund is to engage in active and frequent trading of its portfolio securities which may result in higher portfolio turnover. Turnover is mainly driven by a few strategies employed to help manage duration and curve risk.

S000057730 [Member] Investment Strategy - Morningstar Total Return Bond Fund	Apr. 30, 2026
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	In seeking to maximize total return while also generating income and preserving capital, the Fund will normally invest at least 80% of its assets in debt securities (commonly referred to as “bonds”) of varying maturity, duration, and quality. These debt securities may include U.S. and non-U.S. corporate debt securities, U.S. government debt securities, including Treasury Inflation Protected Bond Securities and zero-coupon securities, non-U.S. government debt securities, emerging-market debt securities, and mortgage-backed and asset-backed securities. To meet its objective, the Fund may invest in investment companies such as ETFs, which could represent a significant percentage of assets. The Fund invests primarily in investment-grade fixed-income securities. The Fund may also invest up to 20% of its assets in fixed-income securities that are rated below investment grade (commonly known as junk bonds), or if unrated, are determined by the Fund’s subadviser(s) to be of comparable quality. In addition, the Fund may invest in collateralized debt obligations (CDOs), which may include collateralized loan obligations (CLOs). CDOs are types of asset-backed securities. CLOs are ordinarily issued by a trust or other special purpose entity and are typically collateralized by a pool of loans, which may include, among others, domestic and non‑U.S. senior secured loans, senior unsecured loans, and subordinate corporate loans, including loans that may be rated below investment grade or equivalent unrated loans, held by such issuer. The Fund may invest up to 10% of its assets in securities denominated in foreign currencies. The Fund may also invest in securities acquired in a private placement, such as Rule 144A securities, as well as derivatives, including options, futures, swaps, and forward foreign currency contracts, for risk management purposes or as part of its investment strategies. Derivatives instruments that provide investment exposure to investments in the Fund’s 80% investment policy and derivatives instruments that provide investment exposure to one or more of the market risk factors associated with such securities may be counted towards the Fund’s 80% investment policy. The Fund may also enter into reverse repurchase agreements and dollar rolls. The Fund may also invest in short-term, high-quality fixed-income securities, cash or cash equivalents, including money market funds. The nature of the strategies in this Fund is to engage in active and frequent trading of its portfolio securities which may result in higher portfolio turnover. Turnover is mainly driven by a few strategies employed to help manage duration and curve risk. Multimanager Approach—The Fund uses a multimanager approach, meaning the adviser, in its discretion, may manage assets directly by investing in open- and closed‑end investment companies, ETFs and individual securities or allocate assets to one or more subadvisers (collectively “Allocation Decisions”). The adviser and each subadviser acts independently from the others and uses its own investment style and process to select securities, within the constraints of the Fund’s investment objective, strategies, and restrictions. Morningstar, as the Fund’s adviser, is responsible for selecting the investment strategies and making Allocation Decisions, with the goal of maximizing return in the context of pursuing the Fund’s investment objective with a prudent level of risk for the strategy. Morningstar may change subadvisers, subject to the oversight of the board of trustees, and sell holdings at any time.

Multimanager Approach—The Fund uses a multimanager approach, meaning the adviser, in its discretion, may manage assets directly by investing in open- and closed‑end investment companies, ETFs and individual securities or allocate assets to one or more subadvisers (collectively “Allocation Decisions”). The adviser and each subadviser acts independently from the others and uses its own investment style and process to select securities, within the constraints of the Fund’s investment objective, strategies, and restrictions. Morningstar, as the Fund’s adviser, is responsible for selecting the investment strategies and making Allocation Decisions, with the goal of maximizing return in the context of pursuing the Fund’s investment objective with a prudent level of risk for the strategy. Morningstar may change subadvisers, subject to the oversight of the board of trustees, and sell holdings at any time.