In seeking total return through a combination of current income and capital appreciation, 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 across various sectors of the fixed-income market. These debt securities may include U.S. and non‑U.S. corporate debt securities, U.S. and non‑U.S. government debt securities, emerging-market debt securities, mortgage-backed and asset-backed securities, municipal securities, and floating-rate notes.

The Fund invests in investment grade and below investment grade fixed income securities. The Fund may invest without limit 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. The Fund may invest without limit in securities denominated in foreign currencies and in U.S. dollar-denominated securities of foreign issuers.

The Fund may invest in securities acquired in a private placement, such as Rule 144A securities, as well as derivatives, including options, futures, swaps, forward foreign currency contracts and currency options, 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. Due to the opportunistic nature of its strategy, the Fund may also invest up to 20% of its assets in equity securities, including common stocks and convertible securities.

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.

S000057733 [Member] Investment Strategy - Morningstar Multisector Bond Fund	Apr. 30, 2026
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	In seeking total return through a combination of current income and capital appreciation, 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 across various sectors of the fixed-income market. These debt securities may include U.S. and non‑U.S. corporate debt securities, U.S. and non‑U.S. government debt securities, emerging-market debt securities, mortgage-backed and asset-backed securities, municipal securities, and floating-rate notes. The Fund invests in investment grade and below investment grade fixed income securities. The Fund may invest without limit 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. The Fund may invest without limit in securities denominated in foreign currencies and in U.S. dollar-denominated securities of foreign issuers. The Fund may invest in securities acquired in a private placement, such as Rule 144A securities, as well as derivatives, including options, futures, swaps, forward foreign currency contracts and currency options, 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. Due to the opportunistic nature of its strategy, the Fund may also invest up to 20% of its assets in equity securities, including common stocks and convertible securities. 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.