S000005556 [Member] Investment Strategy - Nuveen Mid Cap Value Opportunities Fund	Oct. 31, 2025
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	Under normal circumstances, 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 of mid-capitalization value companies. Mid-capitalization companies are defined as companies that have market capitalizations within the market capitalization range of the companies in the Russell Midcap^® Index. The market capitalization range is determined based on the companies in the index as of the last business day of the month in which the index was most recently reconstituted and may be updated to reflect any changes to the index composition and the market capitalization of companies in the index. Value companies are those that are constituents of at least one of the following indexes on the last business day of the month in which its most recent reconstitution was completed (as adjusted by changes to an index between reconstitutions): Russell 3000^® Value Index, S&P Composite 1500^® Value Index and MSCI World IMI Value Index. The Fund’s sub-adviser invests in a select group of companies that it believes are undervalued relative to other companies in the same industry or market, exhibit good or improving fundamentals, and exhibit an identifiable catalyst that could close the gap between market value and fair value over the next one to two years. The Fund’s 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. 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 options, futures contracts, options on futures contracts, and forward foreign currency exchange contracts (“derivatives”). 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.

Under normal circumstances, 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 of mid-capitalization value companies. Mid-capitalization companies are defined as companies that have market capitalizations within the market capitalization range of the companies in the Russell Midcap^® Index. The market capitalization range is determined based on the companies in the index as of the last business day of the month in which the index was most recently reconstituted and may be updated to reflect any changes to the index composition and the market capitalization of companies in the index. Value companies are those that are constituents of at least one of the following indexes on the last business day of the month in which its most recent reconstitution was completed (as adjusted by changes to an index between reconstitutions): Russell 3000^® Value Index, S&P Composite 1500^® Value Index and MSCI World IMI Value Index.

The Fund’s sub-adviser invests in a select group of companies that it believes are undervalued relative to other companies in the same industry or market, exhibit good or improving fundamentals, and exhibit an identifiable catalyst that could close the gap between market value and fair value over the next one to two years. The Fund’s 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.

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 options, futures contracts, options on futures contracts, and forward foreign currency exchange contracts (“derivatives”). 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.