XML 33 R2.htm IDEA: XBRL DOCUMENT v3.25.4
Shareholder Report
 6 Months Ended
Nov. 30, 2025
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name NUVEEN INVESTMENT FUNDS INC
Entity Central Index Key 0000820892
Entity Investment Company Type N-1A
Document Period End Date Nov. 30, 2025
C000015135 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Minnesota Intermediate Municipal Bond Fund
Class Name Class I Shares
Trading Symbol FAMTX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Class I Shares of the Nuveen Minnesota Intermediate Municipal Bond Fund for the period of June 1, 2025 to November 30, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses. You can also request this information by contacting us at (800) 257-8787.
Additional Information Phone Number (800) 257-8787
Additional Information Website https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Expenses [Text Block]
What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment)
   
   
Cost of a 
$10,000 investment 
   Costs paid as a percentage of
$10,000 investment*
     
Class I Shares
   $31    0.61%
* Annualized for period less than one year.
Expenses Paid, Amount $ 31
Expense Ratio, Percent 0.61% [1]
Net Assets $ 364,936,250
Holdings Count | Holding 292
Investment Company Portfolio Turnover 6.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of November 30, 2025)
Fund net assets
    $ 364,936,250  
Total number of portfolio holdings
      292  
Portfolio turnover (%)
      6%  
Holdings [Text Block]
LOGO
LOGO
(1) The ratings disclosed are the highest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
Credit Ratings Selection [Text Block] The ratings disclosed are the highest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
C000137678 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Minnesota Intermediate Municipal Bond Fund
Class Name Class C Shares
Trading Symbol NIBCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Class C Shares of the Nuveen Minnesota Intermediate Municipal Bond Fund for the period of June 1, 2025 to November 30, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses. You can also request this information by contacting us at (800) 257-8787.
Additional Information Phone Number (800) 257-8787
Additional Information Website https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Expenses [Text Block]
What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment)
   
   
Cost of a 
$10,000 investment 
   Costs paid as a percentage of
$10,000 investment*
     
Class C Shares
   $82    1.61%
* Annualized for period less than one year.
Expenses Paid, Amount $ 82
Expense Ratio, Percent 1.61% [2]
Net Assets $ 364,936,250
Holdings Count | Holding 292
Investment Company Portfolio Turnover 6.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of November 30, 2025)
Fund net assets
    $ 364,936,250  
Total number of portfolio holdings
      292  
Portfolio turnover (%)
      6%  
Holdings [Text Block]
LOGO
LOGO
(1) The ratings disclosed are the highest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
Credit Ratings Selection [Text Block] The ratings disclosed are the highest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
C000015134 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Minnesota Intermediate Municipal Bond Fund
Class Name Class A Shares
Trading Symbol FAMAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Class A Shares of the Nuveen Minnesota Intermediate Municipal Bond Fund for the period of June 1, 2025 to November 30, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses. You can also request this information by contacting us at (800) 257-8787.
Additional Information Phone Number (800) 257-8787
Additional Information Website https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Expenses [Text Block]
What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment)
   
   
Cost of a 
$10,000 investment 
   Costs paid as a percentage of
$10,000 investment*
     
Class A Shares
   $41    0.81%
* Annualized for period less than one year.
Expenses Paid, Amount $ 41
Expense Ratio, Percent 0.81% [3]
Net Assets $ 364,936,250
Holdings Count | Holding 292
Investment Company Portfolio Turnover 6.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of November 30, 2025)
Fund net assets
    $ 364,936,250  
Total number of portfolio holdings
      292  
Portfolio turnover (%)
      6%  
Holdings [Text Block]
LOGO
LOGO
(1) The ratings disclosed are the highest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
Credit Ratings Selection [Text Block] The ratings disclosed are the highest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
C000015136 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Minnesota Municipal Bond Fund
Class Name Class A Shares
Trading Symbol FJMNX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Class A Shares of the Nuveen Minnesota Municipal Bond Fund for the period of June 1, 2025 to November 30, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses. You can also request this information by contacting us at (800) 257-8787.
Additional Information Phone Number (800) 257-8787
Additional Information Website https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Expenses [Text Block]
What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment)
   
   
Cost of a 
$10,000 investment 
   Costs paid as a percentage of
$10,000 investment*
     
Class A Shares
   $40    0.78%
* Annualized for period less than one year.
Expenses Paid, Amount $ 40
Expense Ratio, Percent 0.78% [4]
Net Assets $ 685,307,702
Holdings Count | Holding 390
Investment Company Portfolio Turnover 4.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of November 30, 2025)
Fund net assets
    $ 685,307,702  
Total number of portfolio holdings
      390  
Portfolio turnover (%)
      4%  
Holdings [Text Block]
LOGO
LOGO
(1) The ratings disclosed are the highest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
Credit Ratings Selection [Text Block] The ratings disclosed are the highest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
C000137679 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Minnesota Municipal Bond Fund
Class Name Class C Shares
Trading Symbol NTCCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Class C Shares of the Nuveen Minnesota Municipal Bond Fund for the period of June 1, 2025 to November 30, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses. You can also request this information by contacting us at (800) 257-8787.
Additional Information Phone Number (800) 257-8787
Additional Information Website https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Expenses [Text Block]
What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment)
   
   
Cost of a 
$10,000 investment 
   Costs paid as a percentage of
$10,000 investment*
     
Class C Shares
   $81    1.58%
* Annualized for period less than one year.
Expenses Paid, Amount $ 81
Expense Ratio, Percent 1.58% [5]
Net Assets $ 685,307,702
Holdings Count | Holding 390
Investment Company Portfolio Turnover 4.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of November 30, 2025)
Fund net assets
    $ 685,307,702  
Total number of portfolio holdings
      390  
Portfolio turnover (%)
      4%  
Holdings [Text Block]
LOGO
LOGO
(1) The ratings disclosed are the highest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
Credit Ratings Selection [Text Block] The ratings disclosed are the highest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
C000015138 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Minnesota Municipal Bond Fund
Class Name Class I Shares
Trading Symbol FYMNX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Class I Shares of the Nuveen Minnesota Municipal Bond Fund for the period of June 1, 2025 to November 30, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information at https://www.nuveen.com/en-us/mutual-funds/prospectuses. You can also request this information by contacting us at (800) 257-8787.
Additional Information Phone Number (800) 257-8787
Additional Information Website https://www.nuveen.com/en-us/mutual-funds/prospectuses
Expenses [Text Block]
What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment)
   
   
Cost of a 
$10,000 investment 
   Costs paid as a percentage of
$10,000 investment*
     
Class I Shares
   $30    0.58%
* Annualized for period less than one year.
Expenses Paid, Amount $ 30
Expense Ratio, Percent 0.58% [6]
Net Assets $ 685,307,702
Holdings Count | Holding 390
Investment Company Portfolio Turnover 4.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of November 30, 2025)
Fund net assets
    $ 685,307,702  
Total number of portfolio holdings
      390  
Portfolio turnover (%)
      4%  
Holdings [Text Block]
LOGO
LOGO
(1) The ratings disclosed are the highest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
Credit Ratings Selection [Text Block] The ratings disclosed are the highest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
C000015141 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Nebraska Municipal Bond Fund
Class Name Class I Shares
Trading Symbol FNTYX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Class I Shares of the Nuveen Nebraska Municipal Bond Fund for the period of June 1, 2025 to November 30, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information at https://www.nuveen.com/en-us/mutual-funds/prospectuses. You can also request this information by contacting us at (800) 257‑8787.
Additional Information Phone Number (800) 257‑8787
Additional Information Website https://www.nuveen.com/en-us/mutual-funds/prospectuses
Expenses [Text Block]
What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment)
   
   
Cost of a 
$10,000 investment 
   Costs paid as a percentage of
$10,000 investment*
     
Class I Shares
   $31    0.60%
* Annualized for period less than one year.
Expenses Paid, Amount $ 31
Expense Ratio, Percent 0.60% [7]
Net Assets $ 70,426,180
Holdings Count | Holding 97
Investment Company Portfolio Turnover 10.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of November 30, 2025)
Fund net assets
    $ 70,426,180  
Total number of portfolio holdings
      97  
Portfolio turnover (%)
      10%  
Holdings [Text Block]
LOGO
LOGO
(1) The ratings disclosed are the highest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
Credit Ratings Selection [Text Block] The ratings disclosed are the highest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
C000137680 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Nebraska Municipal Bond Fund
Class Name Class C Shares
Trading Symbol NAAFX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Class C Shares of the Nuveen Nebraska Municipal Bond Fund for the period of June 1, 2025 to November 30, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information at https://www.nuveen.com/en-us/mutual-funds/prospectuses. You can also request this information by contacting us at (800) 257‑8787.
Additional Information Phone Number (800) 257‑8787
Additional Information Website https://www.nuveen.com/en-us/mutual-funds/prospectuses
Expenses [Text Block]
What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment)
   
   
Cost of a 
$10,000 investment 
   Costs paid as a percentage of
$10,000 investment*
     
Class C Shares
   $82    1.60%
* Annualized for period less than one year.
Expenses Paid, Amount $ 82
Expense Ratio, Percent 1.60% [8]
Net Assets $ 70,426,180
Holdings Count | Holding 97
Investment Company Portfolio Turnover 10.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of November 30, 2025)
Fund net assets
    $ 70,426,180  
Total number of portfolio holdings
      97  
Portfolio turnover (%)
      10%  
Holdings [Text Block]
LOGO
LOGO
(1) The ratings disclosed are the highest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
Credit Ratings Selection [Text Block] The ratings disclosed are the highest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
C000015139 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Nebraska Municipal Bond Fund
Class Name Class A Shares
Trading Symbol FNTAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Class A Shares of the Nuveen Nebraska Municipal Bond Fund for the period of June 1, 2025 to November 30, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information at https://www.nuveen.com/en-us/mutual-funds/prospectuses. You can also request this information by contacting us at (800) 257-8787.
Additional Information Phone Number (800) 257-8787
Additional Information Website https://www.nuveen.com/en-us/mutual-funds/prospectuses
Expenses [Text Block]
What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment)
   
   
Cost of a 
$10,000 investment 
   Costs paid as a percentage of
$10,000 investment*
     
Class A Shares
   $41    0.80%
* Annualized for period less than one year.
Expenses Paid, Amount $ 41
Expense Ratio, Percent 0.80% [9]
Net Assets $ 70,426,180
Holdings Count | Holding 97
Investment Company Portfolio Turnover 10.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of November 30, 2025)
Fund net assets
    $ 70,426,180  
Total number of portfolio holdings
      97  
Portfolio turnover (%)
      10%  
Holdings [Text Block]
LOGO
LOGO
(1) The ratings disclosed are the highest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
Credit Ratings Selection [Text Block] The ratings disclosed are the highest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
C000015145 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Oregon Intermediate Municipal Bond Fund
Class Name Class A Shares
Trading Symbol FOTAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Class A Shares of the Nuveen Oregon Intermediate Municipal Bond Fund for the period of June 1, 2025 to November 30, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses. You can also request this information by contacting us at (800) 257-8787.
Additional Information Phone Number (800) 257-8787
Additional Information Website https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Expenses [Text Block]
What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment)
   
   
Cost of a 
$10,000 investment 
   Costs paid as a percentage of
$10,000 investment*
     
Class A Shares
   $41    0.80%
* Annualized for period less than one year.
Expenses Paid, Amount $ 41
Expense Ratio, Percent 0.80% [10]
Net Assets $ 207,541,980
Holdings Count | Holding 166
Investment Company Portfolio Turnover 9.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of November 30, 2025)
Fund net assets
    $ 207,541,980  
Total number of portfolio holdings
      166  
Portfolio turnover (%)
      9%  
Holdings [Text Block]
LOGO
LOGO
(1) The ratings disclosed are the highest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
Credit Ratings Selection [Text Block] The ratings disclosed are the highest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
C000137681 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Oregon Intermediate Municipal Bond Fund
Class Name Class C Shares
Trading Symbol NAFOX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Class C Shares of the Nuveen Oregon Intermediate Municipal Bond Fund for the period of June 1, 2025 to November 30, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses. You can also request this information by contacting us at (800) 257-8787.
Additional Information Phone Number (800) 257-8787
Additional Information Website https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Expenses [Text Block]
What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment)
   
   
Cost of a 
$10,000 investment 
   Costs paid as a percentage of
$10,000 investment*
     
Class C Shares
   $82    1.60%
* Annualized for period less than one year.
Expenses Paid, Amount $ 82
Expense Ratio, Percent 1.60% [11]
Net Assets $ 207,541,980
Holdings Count | Holding 166
Investment Company Portfolio Turnover 9.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of November 30, 2025)
Fund net assets
    $ 207,541,980  
Total number of portfolio holdings
      166  
Portfolio turnover (%)
      9%  
Holdings [Text Block]
LOGO
LOGO
(1) The ratings disclosed are the highest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
Credit Ratings Selection [Text Block] The ratings disclosed are the highest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
C000015146 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Oregon Intermediate Municipal Bond Fund
Class Name Class I Shares
Trading Symbol FORCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Class I Shares of the Nuveen Oregon Intermediate Municipal Bond Fund for the period of June 1, 2025 to November 30, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses. You can also request this information by contacting us at (800) 257-8787.
Additional Information Phone Number (800) 257-8787
Additional Information Website https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Expenses [Text Block]
What were the Fund costs for the last six months? (based on a hypothetical $10,000 investment)
   
   
Cost of a 
$10,000 investment 
   Costs paid as a percentage of
$10,000 investment*
     
Class I Shares
   $31    0.60%
* Annualized for period less than one year.
Expenses Paid, Amount $ 31
Expense Ratio, Percent 0.60% [12]
Net Assets $ 207,541,980
Holdings Count | Holding 166
Investment Company Portfolio Turnover 9.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of November 30, 2025)
Fund net assets
    $ 207,541,980  
Total number of portfolio holdings
      166  
Portfolio turnover (%)
      9%  
Holdings [Text Block]
LOGO
LOGO
(1) The ratings disclosed are the highest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
Credit Ratings Selection [Text Block] The ratings disclosed are the highest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
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