v3.26.1
Investment Strategy
Dec. 31, 2025
Nuveen Global Infrastructure Fund  
Prospectus [Line Items]  
Strategy [Heading] Principal Investment Strategies
Strategy Narrative [Text Block]
Under normal market conditions, the Fund invests at least 80% of the sum of its net assets and the amount of any borrowings for investment purposes in equity securities issued by U.S. and non-U.S. infrastructure-related companies. Infrastructure-related companies include companies involved in the ownership, development, construction, renovation, financing or operation of infrastructure assets, or that provide the services and raw materials necessary for the construction and maintenance of infrastructure assets. Infrastructure assets are the physical structures and networks upon which the operation, growth and development of a community depends, which include water, sewer, and energy utilities; transportation and communication networks; health care facilities, government accommodations, and other public service facilities; and shipping, timber, steel, alternative energy, and other resources and services necessary for the construction and maintenance of these physical structures and networks.
Equity securities in which the Fund invests include common and preferred securities, publicly-traded units of master limited partnerships (“MLPs”), and real estate investment trusts (“REITs”). The Fund may also invest in exchange-traded funds (“ETFs”) and other investment companies (“investment companies”). The Fund may invest in companies of any size, including small- and mid-capitalization companies.
In selecting securities, the Fund’s sub-adviser invests in companies that it believes meet one or more of the following criteria:
· Attractively valued relative to other companies in the same industry or market.
· Strong fundamentals, including consistent cash flows or growth and a sound balance sheet.
· Strong management teams.
· Long-term contracts to provide infrastructure-based services.
· An identifiable catalyst that could increase the value of the company’s securities over the next one or two years.
The Fund’s sub-adviser generally will sell a security if any of the following has occurred:
· The security has hit its price target and the company is no longer attractively valued relative to other companies.
· The company’s fundamentals have significantly deteriorated.
· There has been a significant change in the company’s management team.
· A catalyst that could decrease the value of the security has been identified, or a previously existing positive catalyst has disappeared.
· A better alternative exists in the marketplace.
The Fund’s investments include infrastructure-related securities of non-U.S. issuers. Under normal market conditions, the Fund will invest at least 40% of its net assets in securities of non-U.S. issuers and, in any case, will invest at least 30% of its net assets in such issuers.
The Fund diversifies its investments among a number of different countries throughout the world. Up to 25% of the Fund’s total assets may be invested in equity securities of emerging market issuers.
The Fund may utilize derivatives, including options, futures contracts, options on futures contracts, and forward foreign currency exchange contracts. The Fund may use these derivatives to manage market or business risk, enhance the Fund’s return, or hedge against adverse movements in currency exchange rates.
Strategy Portfolio Concentration [Text] Under normal market conditions, the Fund invests at least 80% of the sum of its net assets and the amount of any borrowings for investment purposes in equity securities issued by U.S. and non-U.S. infrastructure-related companies.
Nuveen Real Asset Income Fund  
Prospectus [Line Items]  
Strategy [Heading] Principal Investment Strategies
Strategy Narrative [Text Block]
Under normal market conditions, the Fund invests at least 80% of the sum of its net assets and the amount of any borrowings for investment purposes in securities issued by real asset related companies that are generating income at the time of purchase. Real asset related companies are defined as: (i) companies that are in the energy, telecommunications, utilities or materials sectors; (ii) companies in the real estate or transportation industry groups; (iii) companies, if not in one of these sectors or industries, that (a) derive at least 50% of their revenues or profits from the ownership, management, operation, development, construction, renovation, financing, or sale of real assets, or (b) have at least 50% of the fair market value of their assets invested in real assets; or (iv) pooled investment vehicles that primarily invest in the foregoing companies or that are otherwise designed primarily to provide investment exposure to real assets.
The categories of real assets on which the Fund will focus its investments are infrastructure and real estate. Infrastructure consists of the physical structures and networks upon which the operation, growth and development of a community depends, which include water, sewer, and energy utilities; transportation and communication networks; health care facilities, government accommodations, and other public service facilities; and shipping, timber, steel, alternative energy, and other resources and services necessary for the construction and maintenance of these physical structures and networks. In normal market conditions, the Fund will invest at least 25% of its assets, collectively, in securities of issuers in the infrastructure and real estate industries.
The Fund will invest in both equity securities and debt securities, but will not invest more than 40% of its net assets in debt securities. All or a portion of the Fund’s debt securities may be rated lower than investment grade (BB/Ba or lower). Equity securities in which the Fund may invest may be of any market capitalization, including small- and mid-capitalization companies, and include common stock, preferred securities, hybrid securities and convertible securities, as well as interests in real estate investment trusts (“REITs”), exchange-traded notes (“ETNs”), other investment companies (including exchange-traded funds (“ETFs”)) and equity securities issued by master limited partnerships (“MLPs”). Debt securities in which the Fund may invest include corporate debt obligations, mortgage-backed securities and debt securities issued by MLPs.
The Fund may invest in securities that have not been registered under the Securities Act of 1933, as amended (the “Securities Act”) (“restricted securities”), including securities sold in private placement transactions between issuers and their purchasers and securities that meet the requirements of Rule 144A under the Securities Act (“Rule 144A securities”). Rule 144A securities may be resold under certain circumstances only to qualified institutional buyers as defined by the rule.
The Fund will invest in non-U.S. securities, but will limit its exposure to emerging markets to 50% of its net assets at the time of purchase.
The Fund may utilize derivatives, including options, futures contracts, options on futures contracts, and forward foreign currency exchange contracts. The Fund may use these derivatives to manage market or business risk, enhance the Fund’s return, or hedge against adverse movements in currency exchange rates.
In selecting securities for the Fund, the sub-adviser will utilize a team-based investment philosophy and primarily employ a bottom-up approach that relies on fundamental research by its Real Assets Team and its Taxable Fixed Income Team. The sub-adviser will complement its bottom-up approach with top-down research. The sub-adviser seeks to invest opportunistically based on market conditions, which may cause frequent trading of portfolio securities and a high portfolio turnover rate.
Strategy Portfolio Concentration [Text] In normal market conditions, the Fund will invest at least 25% of its assets, collectively, in securities of issuers in the infrastructure and real estate industries.
Nuveen Real Estate Securities Fund  
Prospectus [Line Items]  
Strategy [Heading] Principal Investment Strategies
Strategy Narrative [Text Block]
Under normal market conditions, the Fund invests at least 80% of the sum of its net assets and the amount of any borrowings for investment purposes in income-producing common stocks of publicly traded companies engaged in the real estate industry. These companies derive at least 50% of their revenues or profits from the ownership, construction, management, financing or sale of real estate, or have at least 50% of the fair market value of their assets invested in real estate.
The Fund’s sub-adviser will select companies that it believes exhibit strong management teams, a strong competitive position, above average growth in revenues and a sound balance sheet. These companies may be of any market capitalization, including small- and mid-capitalization companies. The sub-adviser will generally sell a stock if the stock hits its price target, the company’s fundamentals or competitive position significantly deteriorate, or if a better alternative exists in the marketplace.
A majority of the Fund’s total assets will be invested in real estate investment trusts (“REITs”). REITs are publicly traded corporations or trusts that invest in residential or commercial real estate. REITs generally can be divided into the following three types:
· Equity REITs, which invest the majority of their assets directly in real property and derive their income primarily from rents and capital gains or real estate appreciation.
· Mortgage REITs, which invest the majority of their assets in real estate mortgage loans and derive their income primarily from interest payments.
· Hybrid REITs, which combine the characteristics of equity REITs and mortgage REITs.
The Fund expects to emphasize investments in equity REITs, although it may invest in all three kinds of REITs.
The Fund may invest up to 15% of its total assets in non-dollar denominated equity securities of non-U.S. issuers. In addition, the Fund may invest up to 25% of its assets, collectively, in non-dollar denominated equity securities of non-U.S. issuers and in dollar-denominated equity securities of non-U.S. issuers that are either listed on a U.S. stock exchange or represented by depositary receipts that may or may not be sponsored by a domestic bank. Up to 15% of the Fund’s total assets may be invested in equity securities of emerging market issuers.
The Fund may utilize derivatives, including options, futures contracts, options on futures contracts, and forward foreign currency exchange contracts. The Fund may use these derivatives to manage market or business risk, enhance the Fund’s return, or hedge against adverse movements in currency exchange rates.
Strategy Portfolio Concentration [Text] Under normal market conditions, the Fund invests at least 80% of the sum of its net assets and the amount of any borrowings for investment purposes in income-producing common stocks of publicly traded companies engaged in the real estate industry.