v3.26.1
Shareholder Report
12 Months Ended
May 31, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSR
Amendment Flag false
Registrant Name Nuveen Multistate Trust I
Entity Central Index Key 0001018972
Entity Investment Company Type N-1A
Document Period End Date May 31, 2026
C000001477 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Arizona Municipal Bond Fund
Class Name Class I Shares
Trading Symbol NMARX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Class I Shares of the Nuveen Arizona Municipal Bond Fund for the period of June 1, 2025 to May 31, 2026.
Shareholder Report Annual or Semi-Annual 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.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
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 year? (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
 
$66
 
0.64%
  *  
Annualized for period less than one year.
 
Expenses Paid, Amount $ 66
Expense Ratio, Percent 0.64% [1]
Factors Affecting Performance [Text Block]
How did the Fund perform last year? What affected the Fund’s performance?
Performance Highlights
 
The Nuveen Arizona Municipal Bond Fund returned 7.27% for Class I Shares at net asset value (NAV) for the 12 months ended May 31, 2026. The Fund outperformed the S&P Municipal Bond Arizona Index, which returned 6.51%.
 
Top contributors to relative performance
 
Duration positioning, especially an overweight to bonds with durations of six years and longer.
 
Credit quality positioning, especially an overweight to non‑rated bonds, an underweight to AAA‑rated bonds, and exposure to long-duration A‑rated bonds.
 
Long-duration tax‑supported bonds, particularly dedicated‑tax bonds.
 
Top detractors from relative performance
 
Security selection.
Performance Past Does Not Indicate Future [Text] Performance data shown represents past performance and does not predict or guarantee future results.
Line Graph [Table Text Block]
LOGO
Average Annual Return [Table Text Block]
Average Annual Total Returns
     
       1‑Year        5‑Year        10‑Year  
       
Class I Shares at NAV
       7.27        0.63        2.06
       
S&P Municipal Bond Index
       6.57        1.14        2.30
       
S&P Municipal Bond Arizona Index
       6.51        1.26        2.25
       
Lipper Other States Municipal Debt Funds Classification Average
       7.08        0.43        1.54
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund Shares.
Updated Performance Information Location [Text Block] For most recent month‑end performance, go to https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or call (800) 257‑8787.
Net Assets $ 179,219,566
Holdings Count | Holding 191
Advisory Fees Paid, Amount $ 852,266
Investment Company Portfolio Turnover 8.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of May 31, 2026)
Fund net assets
   $ 179,219,566  
Total number of portfolio holdings
     191  
Portfolio turnover (%)
     8%  
Total management fees paid for the year
   $ 852,266  
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.
Material Fund Change [Text Block]
How has the Fund changed?
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or upon request at (800) 257‑8787.
Summary of Change Legend [Text Block]
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or upon request at (800) 257‑8787.
Updated Prospectus Phone Number (800) 257‑8787
Updated Prospectus Web Address https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
C000137693 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Arizona Municipal Bond Fund
Class Name Class C Shares
Trading Symbol FZCCX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Class C Shares of the Nuveen Arizona Municipal Bond Fund for the period of June 1, 2025 to May 31, 2026.
Shareholder Report Annual or Semi-Annual 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.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
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 year? (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
 
$169
 
1.64%
  *  
Annualized for period less than one year.
 
Expenses Paid, Amount $ 169
Expense Ratio, Percent 1.64% [2]
Factors Affecting Performance [Text Block]
How did the Fund perform last year? What affected the Fund’s performance?
Performance Highlights
 
The Nuveen Arizona Municipal Bond Fund returned 6.31% for Class C Shares at net asset value (NAV) for the 12 months ended May 31, 2026. The Fund performed in line with the S&P Municipal Bond Arizona Index, which returned 6.51%.
 
Top contributors to relative performance
 
Duration positioning, especially an overweight to bonds with durations of six years and longer.
 
Credit quality positioning, especially an overweight to non‑rated bonds, an underweight to AAA‑rated bonds, and exposure to long-duration A‑rated bonds.
 
Long-duration tax‑supported bonds, particularly dedicated‑tax bonds.
 
Top detractors from relative performance
 
Security selection.
Performance Past Does Not Indicate Future [Text] Performance data shown represents past performance and does not predict or guarantee future results.
Line Graph [Table Text Block]
LOGO
Average Annual Return [Table Text Block]
Average Annual Total Returns
     
       1‑Year        5‑Year        10‑Year  
       
Class C Shares at NAV (excluding maximum sales charge)
       6.31        (0.36 )%         1.23
       
S&P Municipal Bond Index
       6.57        1.14        2.30
       
S&P Municipal Bond Arizona Index
       6.51        1.26        2.25
       
Lipper Other States Municipal Debt Funds Classification Average
       7.08        0.43        1.54
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund Shares.
Updated Performance Information Location [Text Block] For most recent month‑end performance, go to https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or call (800) 257‑8787.
Net Assets $ 179,219,566
Holdings Count | Holding 191
Advisory Fees Paid, Amount $ 852,266
Investment Company Portfolio Turnover 8.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of May 31, 2026)
Fund net assets
   $ 179,219,566  
Total number of portfolio holdings
     191  
Portfolio turnover (%)
     8%  
Total management fees paid for the year
   $ 852,266  
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.
Material Fund Change [Text Block]
How has the Fund changed?
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or upon request at (800) 257‑8787.
Summary of Change Legend [Text Block]
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or upon request at (800) 257‑8787.
Updated Prospectus Phone Number (800) 257‑8787
Updated Prospectus Web Address https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
C000001474 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Arizona Municipal Bond Fund
Class Name Class A Shares
Trading Symbol FAZTX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Class A Shares of the Nuveen Arizona Municipal Bond Fund for the period of June 1, 2025 to May 31, 2026.
Shareholder Report Annual or Semi-Annual 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.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
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 year? (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
 
$87
 
0.84%
  *  
Annualized for period less than one year.
 
Expenses Paid, Amount $ 87
Expense Ratio, Percent 0.84% [3]
Factors Affecting Performance [Text Block]
How did the Fund perform last year? What affected the Fund’s performance?
Performance Highlights
 
The Nuveen Arizona Municipal Bond Fund returned 7.13% for Class A Shares at net asset value (NAV) for the 12 months ended May 31, 2026. The Fund outperformed the S&P Municipal Bond Arizona Index, which returned 6.51%.
 
Top contributors to relative performance
 
Duration positioning, especially an overweight to bonds with durations of six years and longer.
 
Credit quality positioning, especially an overweight to non‑rated bonds, an underweight to AAA‑rated bonds, and exposure to long-duration A‑rated bonds.
 
Long-duration tax‑supported bonds, particularly dedicated‑tax bonds.
 
Top detractors from relative performance
 
Security selection.
Performance Past Does Not Indicate Future [Text] Performance data shown represents past performance and does not predict or guarantee future results.
Line Graph [Table Text Block]
LOGO
Average Annual Return [Table Text Block]
Average Annual Total Returns
     
       1‑Year        5‑Year        10‑Year  
       
Class A Shares at NAV (excluding maximum sales charge)
       7.13        0.44        1.87
       
Class A Shares at maximum sales charge (Offering Price)
       2.61        (0.42 )%         1.43
       
S&P Municipal Bond Index
       6.57        1.14        2.30
       
S&P Municipal Bond Arizona Index
       6.51        1.26        2.25
       
Lipper Other States Municipal Debt Funds Classification Average
       7.08        0.43        1.54
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund Shares.
Updated Performance Information Location [Text Block] For most recent month‑end performance, go to https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or call (800) 257‑8787.
Net Assets $ 179,219,566
Holdings Count | Holding 191
Advisory Fees Paid, Amount $ 852,266
Investment Company Portfolio Turnover 8.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of May 31, 2026)
Fund net assets
   $ 179,219,566  
Total number of portfolio holdings
     191  
Portfolio turnover (%)
     8%  
Total management fees paid for the year
   $ 852,266  
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.
Material Fund Change [Text Block]
How has the Fund changed?
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or upon request at (800) 257‑8787.
Summary of Change Legend [Text Block]
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or upon request at (800) 257‑8787.
Updated Prospectus Phone Number (800) 257‑8787
Updated Prospectus Web Address https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
C000001478 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Colorado Municipal Bond Fund
Class Name Class A Shares
Trading Symbol FCOTX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Class A Shares of the Nuveen Colorado Municipal Bond Fund for the period of June 1, 2025 to May 31, 2026.
Shareholder Report Annual or Semi-Annual 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.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
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 year? (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
 
$81
 
0.78%
  *  
Annualized for period less than one year.
 
Expenses Paid, Amount $ 81
Expense Ratio, Percent 0.78% [4]
Factors Affecting Performance [Text Block]
How did the Fund perform last year? What affected the Fund’s performance?
Performance Highlights
 
The Nuveen Colorado Municipal Bond Fund returned 6.58% for Class A Shares at net asset value (NAV) for the 12 months ended May 31, 2026. The Fund underperformed the S&P Municipal Bond Colorado Index, which returned 7.30%.
 
Top contributors to relative performance
 
Duration positioning, especially an overweight to longer-duration bonds and an underweight to shorter-duration bonds.
 
Sector positioning, especially an overweight to incremental-tax bonds.
 
Credit quality positioning, especially an overweight to lower-rated bonds.
 
Top detractors from relative performance
 
Overweights to the health care and utility bond sectors and an underweight to the industrial development revenue bond sector.
 
Underweight to AAA-rated and non-rated bonds and an overweight to AA-rated bonds.
 
Security selection in the health care, housing and transportation bond sectors.
 
Performance Past Does Not Indicate Future [Text] Performance data shown represents past performance and does not predict or guarantee future results.
Line Graph [Table Text Block]
LOGO
Average Annual Return [Table Text Block]
Average Annual Total Returns
     
       1‑Year        5‑Year        10‑Year  
       
Class A Shares at NAV (excluding maximum sales charge)
       6.58        0.44        1.95
       
Class A Shares at maximum sales charge (Offering Price)
       2.06        (0.42 )%         1.52
       
S&P Municipal Bond Index
       6.57        1.14        2.30
       
S&P Municipal Bond Colorado Index
       7.30        1.47        2.69
       
Lipper Other States Municipal Debt Funds Classification Average
       7.08        0.43        1.54
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund Shares.
Updated Performance Information Location [Text Block] For most recent month‑end performance, go to https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or call (800) 257‑8787.
Net Assets $ 481,804,907
Holdings Count | Holding 257
Advisory Fees Paid, Amount $ 2,292,454
Investment Company Portfolio Turnover 12.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of May 31, 2026)
Fund net assets
   $ 481,804,907  
Total number of portfolio holdings
     257  
Portfolio turnover (%)
     12%  
Total management fees paid for the year
   $ 2,292,454  
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.
Material Fund Change [Text Block]
How has the Fund changed?
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or upon request at (800) 257‑8787.
Summary of Change Legend [Text Block]
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or upon request at (800) 257‑8787.
Updated Prospectus Phone Number (800) 257‑8787
Updated Prospectus Web Address https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
C000137694 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Colorado Municipal Bond Fund
Class Name Class C Shares
Trading Symbol FAFKX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Class C Shares of the Nuveen Colorado Municipal Bond Fund for the period of June 1, 2025 to May 31, 2026.
Shareholder Report Annual or Semi-Annual 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.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
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 year? (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
 
$163
 
1.58%
  *  
Annualized for period less than one year.
 
Expenses Paid, Amount $ 163
Expense Ratio, Percent 1.58% [5]
Factors Affecting Performance [Text Block]
How did the Fund perform last year? What affected the Fund’s performance?
Performance Highlights
 
The Nuveen Colorado Municipal Bond Fund returned 5.76% for Class C Shares at net asset value (NAV) for the 12 months ended May 31, 2026. The Fund underperformed the S&P Municipal Bond Colorado Index, which returned 7.30%.
 
Top contributors to relative performance
 
Duration positioning, especially an overweight to longer-duration bonds and an underweight to shorter-duration bonds.
 
Sector positioning, especially an overweight to incremental-tax bonds.
 
Credit quality positioning, especially an overweight to lower-rated bonds.
 
Top detractors from relative performance
 
Overweights to the health care and utility bond sectors and an underweight to the industrial development revenue bond sector.
 
Underweight to AAA-rated and non-rated bonds and an overweight to AA-rated bonds.
 
Security selection in the health care, housing and transportation bond sectors.
Performance Past Does Not Indicate Future [Text] Performance data shown represents past performance and does not predict or guarantee future results.
Line Graph [Table Text Block]
LOGO
Average Annual Return [Table Text Block]
Average Annual Total Returns
     
       1‑Year        5‑Year        10‑Year  
       
Class C Shares at NAV (excluding maximum sales charge)
       5.76        (0.37 )%         1.29
       
S&P Municipal Bond Index
       6.57        1.14        2.30
       
S&P Municipal Bond Colorado Index
       7.30        1.47        2.69
       
Lipper Other States Municipal Debt Funds Classification Average
       7.08        0.43        1.54
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund Shares.
Updated Performance Information Location [Text Block] For most recent month-end performance, go to https://www.nuveen.com/en-us/mutual-funds/prospectuses or call (800) 257‑8787.
Net Assets $ 481,804,907
Holdings Count | Holding 257
Advisory Fees Paid, Amount $ 2,292,454
Investment Company Portfolio Turnover 12.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of May 31, 2026)
Fund net assets
   $ 481,804,907  
Total number of portfolio holdings
     257  
Portfolio turnover (%)
     12%  
Total management fees paid for the year
   $ 2,292,454  
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.
Material Fund Change [Text Block]
How has the Fund changed?
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or upon request at (800) 257‑8787.
Summary of Change Legend [Text Block]
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or upon request at (800) 257‑8787.
Updated Prospectus Phone Number (800) 257‑8787
Updated Prospectus Web Address https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
C000001481 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Colorado Municipal Bond Fund
Class Name Class I Shares
Trading Symbol FCORX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Class I Shares of the Nuveen Colorado Municipal Bond Fund for the period of June 1, 2025 to May 31, 2026.
Shareholder Report Annual or Semi-Annual 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.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
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 year? (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
 
$60
 
0.58%
  *  
Annualized for period less than one year.
 
Expenses Paid, Amount $ 60
Expense Ratio, Percent 0.58% [6]
Factors Affecting Performance [Text Block]
How did the Fund perform last year? What affected the Fund’s performance?
Performance Highlights
 
The Nuveen Colorado Municipal Bond Fund returned 6.78% for Class I Shares at net asset value (NAV) for the 12 months ended May 31, 2026. The Fund underperformed the S&P Municipal Bond Colorado Index, which returned 7.30%.
 
Top contributors to relative performance
 
Duration positioning, especially an overweight to longer-duration bonds and an underweight to shorter-duration bonds.
 
Sector positioning, especially an overweight to incremental-tax bonds.
 
Credit quality positioning, especially an overweight to lower-rated bonds.
 
Top detractors from relative performance
 
Overweights to the health care and utility bond sectors and an underweight to the industrial development revenue bond sector.
 
Underweight to AAA-rated and non-rated bonds and an overweight to AA-rated bonds.
 
Security selection in the health care, housing and transportation bond sectors.
 
Performance Past Does Not Indicate Future [Text] Performance data shown represents past performance and does not predict or guarantee future results.
Line Graph [Table Text Block]
LOGO
Average Annual Return [Table Text Block]
Average Annual Total Returns
     
       1‑Year        5‑Year        10‑Year  
       
Class I Shares at NAV
       6.78        0.63        2.14
       
S&P Municipal Bond Index
       6.57        1.14        2.30
       
S&P Municipal Bond Colorado Index
       7.30        1.47        2.69
       
Lipper Other States Municipal Debt Funds Classification Average
       7.08        0.43        1.54
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund Shares.
Updated Performance Information Location [Text Block] For most recent month-end performance, go to https://www.nuveen.com/en-us/mutual-funds/prospectuses or call (800) 257‑8787.
Net Assets $ 481,804,907
Holdings Count | Holding 257
Advisory Fees Paid, Amount $ 2,292,454
Investment Company Portfolio Turnover 12.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of May 31, 2026)
Fund net assets
   $ 481,804,907  
Total number of portfolio holdings
     257  
Portfolio turnover (%)
     12%  
Total management fees paid for the year
   $ 2,292,454  
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.
Material Fund Change [Text Block]
How has the Fund changed?
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en-us/mutual-funds/prospectuses or upon request at (800) 257-8787.
Summary of Change Legend [Text Block]
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en-us/mutual-funds/prospectuses or upon request at (800) 257-8787.
Updated Prospectus Phone Number (800) 257-8787
Updated Prospectus Web Address https://www.nuveen.com/en-us/mutual-funds/prospectuses
C000001489 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Maryland Municipal Bond Fund
Class Name Class I Shares
Trading Symbol NMMDX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Class I Shares of the Nuveen Maryland Municipal Bond Fund for the period of June 1, 2025 to May 31, 2026.
Shareholder Report Annual or Semi-Annual 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.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
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 year? (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
 
$58
 
0.56%
  *  
Annualized for period less than one year.
 
Expenses Paid, Amount $ 58
Expense Ratio, Percent 0.56% [7]
Factors Affecting Performance [Text Block]
How did the Fund perform last year? What affected the Fund’s performance?
Performance Highlights
 
The Nuveen Maryland Municipal Bond Fund returned 7.75% for Class I Shares at net asset value (NAV) for the 12 months ended May 31, 2026. The Fund outperformed the S&P Municipal Bond Maryland Index, which returned 6.10%.
 
Top contributors to relative performance
 
Duration positioning, especially an overweight to bonds with durations of 10 years and longer and an underweight to bonds with durations under four years.
 
Credit quality positioning, especially overweights to non‑rated, A‑rated and BBB‑rated bonds.
 
Top detractors from relative performance
 
An underweight to bonds with durations between six and eight years.
Performance Past Does Not Indicate Future [Text] Performance data shown represents past performance and does not predict or guarantee future results.
Line Graph [Table Text Block]
LOGO
Average Annual Return [Table Text Block]
Average Annual Total Returns
     
       1‑Year        5‑Year        10‑Year  
       
Class I Shares at NAV
       7.75        0.81        2.14
       
S&P Municipal Bond Index
       6.57        1.14        2.30
       
S&P Municipal Bond Maryland Index
       6.10        1.06        2.02
       
Lipper Maryland Municipal Debt Funds Classification Average
       7.16        0.69        1.74
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund Shares.
Updated Performance Information Location [Text Block] For most recent month‑end performance, go to https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or call (800) 257‑8787.
Net Assets $ 268,408,054
Holdings Count | Holding 200
Advisory Fees Paid, Amount $ 1,242,934
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of May 31, 2026)
Fund net assets
   $ 268,408,054  
Total number of portfolio holdings
     200  
Portfolio turnover (%)
     11%  
Total management fees paid for the year
   $ 1,242,934  
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.
Material Fund Change [Text Block]
How has the Fund changed?
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or upon request at (800) 257‑8787.
Summary of Change Legend [Text Block]
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or upon request at (800) 257‑8787.
Updated Prospectus Phone Number (800) 257‑8787
Updated Prospectus Web Address https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
C000137695 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Maryland Municipal Bond Fund
Class Name Class C Shares
Trading Symbol NACCX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Class C Shares of the Nuveen Maryland Municipal Bond Fund for the period of June 1, 2025 to May 31, 2026.
Shareholder Report Annual or Semi-Annual 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.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
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 year? (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
 
$161
 
1.56%
  *  
Annualized for period less than one year.
 
Expenses Paid, Amount $ 161
Expense Ratio, Percent 1.56% [8]
Factors Affecting Performance [Text Block]
How did the Fund perform last year? What affected the Fund’s performance?
Performance Highlights
 
The Nuveen Maryland Municipal Bond Fund returned 6.72% for Class C Shares at net asset value (NAV) for the 12 months ended May 31, 2026. The Fund outperformed the S&P Municipal Bond Maryland Index, which returned 6.10%.
 
Top contributors to relative performance
 
Duration positioning, especially an overweight to bonds with durations of 10 years and longer and an underweight to bonds with durations under four years.
 
Credit quality positioning, especially overweights to non‑rated, A‑rated and BBB‑rated bonds.
 
Top detractors from relative performance
 
An underweight to bonds with durations between six and eight years.
Performance Past Does Not Indicate Future [Text] Performance data shown represents past performance and does not predict or guarantee future results.
Line Graph [Table Text Block]
LOGO
Average Annual Return [Table Text Block]
Average Annual Total Returns
     
       1‑Year        5‑Year        10‑Year  
       
Class C Shares at NAV (excluding maximum sales charge)
       6.72        (0.17 )%         1.30
       
S&P Municipal Bond Index
       6.57        1.14        2.30
       
S&P Municipal Bond Maryland Index
       6.10        1.06        2.02
       
Lipper Maryland Municipal Debt Funds Classification Average
       7.16        0.69        1.74
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund Shares.
Updated Performance Information Location [Text Block] For most recent month‑end performance, go to https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or call (800) 257‑8787.
Net Assets $ 268,408,054
Holdings Count | Holding 200
Advisory Fees Paid, Amount $ 1,242,934
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of May 31, 2026)
Fund net assets
   $ 268,408,054  
Total number of portfolio holdings
     200  
Portfolio turnover (%)
     11%  
Total management fees paid for the year
   $ 1,242,934  
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.
Material Fund Change [Text Block]
How has the Fund changed?
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en-us/mutual-funds/prospectuses or upon request at (800) 257-8787.
Summary of Change Legend [Text Block]
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en-us/mutual-funds/prospectuses or upon request at (800) 257-8787.
Updated Prospectus Phone Number (800) 257-8787
Updated Prospectus Web Address https://www.nuveen.com/en-us/mutual-funds/prospectuses
C000001486 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Maryland Municipal Bond Fund
Class Name Class A Shares
Trading Symbol NMDAX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Class A Shares of the Nuveen Maryland Municipal Bond Fund for the period of June 1, 2025 to May 31, 2026.
Shareholder Report Annual or Semi-Annual 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.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
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 year? (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
 
$79
 
0.76%
  *  
Annualized for period less than one year.
 
Expenses Paid, Amount $ 79
Expense Ratio, Percent 0.76% [9]
Factors Affecting Performance [Text Block]
How did the Fund perform last year? What affected the Fund’s performance?
Performance Highlights
 
The Nuveen Maryland Municipal Bond Fund returned 7.55% for Class A Shares at net asset value (NAV) for the 12 months ended May 31, 2026. The Fund outperformed the S&P Municipal Bond Maryland Index, which returned 6.10%.
 
Top contributors to relative performance
 
Duration positioning, especially an overweight to bonds with durations of 10 years and longer and an underweight to bonds with durations under four years.
 
Credit quality positioning, especially overweights to non-rated, A-rated and BBB-rated bonds.
 
Top detractors from relative performance
 
An underweight to bonds with durations between six and eight years.
 
Performance Past Does Not Indicate Future [Text] Performance data shown represents past performance and does not predict or guarantee future results.
Line Graph [Table Text Block]
LOGO
Average Annual Return [Table Text Block]
Average Annual Total Returns
     
       1‑Year        5‑Year        10‑Year  
       
Class A Shares at NAV (excluding maximum sales charge)
       7.55        0.63        1.95
       
Class A Shares at maximum sales charge (Offering Price)
       3.00        (0.24 )%         1.51
       
S&P Municipal Bond Index
       6.57        1.14        2.30
       
S&P Municipal Bond Maryland Index
       6.10        1.06        2.02
       
Lipper Maryland Municipal Debt Funds Classification Average
       7.16        0.69        1.74
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund Shares.
Updated Performance Information Location [Text Block] For most recent month-end performance, go to https://www.nuveen.com/en-us/mutual-funds/prospectuses or call (800) 257‑8787.
Net Assets $ 268,408,054
Holdings Count | Holding 200
Advisory Fees Paid, Amount $ 1,242,934
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of May 31, 2026)
Fund net assets
   $ 268,408,054  
Total number of portfolio holdings
     200  
Portfolio turnover (%)
     11%  
Total management fees paid for the year
   $ 1,242,934  
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.
Material Fund Change [Text Block]
How has the Fund changed?
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en-us/mutual-funds/prospectuses or upon request at (800) 257-8787.
Summary of Change Legend [Text Block]
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en-us/mutual-funds/prospectuses or upon request at (800) 257-8787.
Updated Prospectus Phone Number (800) 257-8787
Updated Prospectus Web Address https://www.nuveen.com/en-us/mutual-funds/prospectuses
C000001490 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen New Mexico Municipal Bond Fund
Class Name Class A Shares
Trading Symbol FNMTX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Class A Shares of the Nuveen New Mexico Municipal Bond Fund for the period of June 1, 2025 to May 31, 2026.
Shareholder Report Annual or Semi-Annual 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.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
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 year? (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
 
$86
 
0.83%
  *  
Annualized for period less than one year.
 
Expenses Paid, Amount $ 86
Expense Ratio, Percent 0.83% [10]
Factors Affecting Performance [Text Block]
How did the Fund perform last year? What affected the Fund’s performance?
Performance Highlights
 
The Nuveen New Mexico Municipal Bond Fund returned 7.36% for Class A Shares at net asset value (NAV) for the 12 months ended May 31, 2026. The Fund outperformed the S&P Municipal Bond New Mexico Index, which returned 5.64%.
 
Top contributors to relative performance
 
Duration positioning, especially an overweight to bonds with durations of 10 years and longer and an underweight to bonds with durations of eight years and shorter.
 
Credit quality positioning, especially an overweight to non‑rated bonds, an underweight to AA‑rated bonds, and exposure to long-duration A‑rated bonds.
 
Top detractors from relative performance
 
Sector positioning, especially an underweight to the housing bond sector.
Performance Past Does Not Indicate Future [Text] Performance data shown represents past performance and does not predict or guarantee future results.
Line Graph [Table Text Block]
LOGO
Average Annual Return [Table Text Block]
Average Annual Total Returns
     
       1‑Year        5‑Year        10‑Year  
       
Class A Shares at NAV (excluding maximum sales charge)
       7.36        0.72        1.87
       
Class A Shares at maximum sales charge (Offering Price)
       2.83        (0.14 )%         1.43
       
S&P Municipal Bond Index
       6.57        1.14        2.30
       
S&P Municipal Bond New Mexico Index
       5.64        1.33        2.05
       
Lipper Other States Municipal Debt Funds Classification Average
       7.08        0.43        1.54
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund Shares.
Updated Performance Information Location [Text Block] For most recent month‑end performance, go to https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or call (800) 257‑8787.
Net Assets $ 71,005,360
Holdings Count | Holding 80
Advisory Fees Paid, Amount $ 345,805
Investment Company Portfolio Turnover 16.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of May 31, 2026)
Fund net assets
   $ 71,005,360  
Total number of portfolio holdings
     80  
Portfolio turnover (%)
     16%  
Total management fees paid for the year
   $ 345,805  
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.
Material Fund Change [Text Block]
How has the Fund changed?
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or upon request at (800) 257‑8787.
Summary of Change Legend [Text Block]
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or upon request at (800) 257‑8787.
Updated Prospectus Phone Number (800) 257‑8787
Updated Prospectus Web Address https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
C000137696 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen New Mexico Municipal Bond Fund
Class Name Class C Shares
Trading Symbol FNCCX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Class C Shares of the Nuveen New Mexico Municipal Bond Fund for the period of June 1, 2025 to May 31, 2026.
Shareholder Report Annual or Semi-Annual 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.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
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 year? (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
 
$168
 
1.63%
  *  
Annualized for period less than one year.
 
Expenses Paid, Amount $ 168
Expense Ratio, Percent 1.63% [11]
Factors Affecting Performance [Text Block]
How did the Fund perform last year? What affected the Fund’s performance?
 
Performance Highlights
 
The Nuveen New Mexico Municipal Bond Fund returned 6.55% for Class C Shares at net asset value (NAV) for the 12 months ended May 31, 2026. The Fund outperformed the S&P Municipal Bond New Mexico Index, which returned 5.64%.
 
Top contributors to relative performance
 
Duration positioning, especially an overweight to bonds with durations of 10 years and longer and an underweight to bonds with durations of eight years and shorter.
 
Credit quality positioning, especially an overweight to non‑rated bonds, an underweight to AA‑rated bonds, and exposure to long-duration A‑rated bonds.
 
Top detractors from relative performance
 
Sector positioning, especially an underweight to the housing bond sector.
Performance Past Does Not Indicate Future [Text] Performance data shown represents past performance and does not predict or guarantee future results.
Line Graph [Table Text Block]
LOGO
Average Annual Return [Table Text Block]
Average Annual Total Returns
     
       1‑Year        5‑Year        10‑Year  
       
Class C Shares at NAV (excluding maximum sales charge)
       6.55        (0.06 )%         1.23
       
S&P Municipal Bond Index
       6.57        1.14        2.30
       
S&P Municipal Bond New Mexico Index
       5.64        1.33        2.05
       
Lipper Other States Municipal Debt Funds Classification Average
       7.08        0.43        1.54
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund Shares.
Updated Performance Information Location [Text Block] For most recent month‑end performance, go to https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or call (800) 257‑8787.
Net Assets $ 71,005,360
Holdings Count | Holding 80
Advisory Fees Paid, Amount $ 345,805
Investment Company Portfolio Turnover 16.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of May 31, 2026)
Fund net assets
   $ 71,005,360  
Total number of portfolio holdings
     80  
Portfolio turnover (%)
     16%  
Total management fees paid for the year
   $ 345,805  
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.
Material Fund Change [Text Block]
How has the Fund changed?
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or upon request at (800) 257‑8787.
Summary of Change Legend [Text Block]
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or upon request at (800) 257‑8787.
Updated Prospectus Phone Number (800) 257‑8787
Updated Prospectus Web Address https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
C000001493 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen New Mexico Municipal Bond Fund
Class Name Class I Shares
Trading Symbol FNMRX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Class I Shares of the Nuveen New Mexico Municipal Bond Fund for the period of June 1, 2025 to May 31, 2026.
Shareholder Report Annual or Semi-Annual 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.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
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 year? (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
 
$65
 
0.63%
  *  
Annualized for period less than one year.
 
Expenses Paid, Amount $ 65
Expense Ratio, Percent 0.63% [12]
Factors Affecting Performance [Text Block]
How did the Fund perform last year? What affected the Fund’s performance?
Performance Highlights
 
The Nuveen New Mexico Municipal Bond Fund returned 7.60% for Class I Shares at net asset value (NAV) for the 12 months ended May 31, 2026. The Fund outperformed the S&P Municipal Bond New Mexico Index, which returned 5.64%.
 
Top contributors to relative performance
 
Duration positioning, especially an overweight to bonds with durations of 10 years and longer and an underweight to bonds with durations of eight years and shorter.
 
Credit quality positioning, especially an overweight to non‑rated bonds, an underweight to AA‑rated bonds, and exposure to long-duration A‑rated bonds.
 
Top detractors from relative performance
 
Sector positioning, especially an underweight to the housing bond sector.
Performance Past Does Not Indicate Future [Text] Performance data shown represents past performance and does not predict or guarantee future results.
Line Graph [Table Text Block]
LOGO
Average Annual Return [Table Text Block]
Average Annual Total Returns
     
       1‑Year        5‑Year        10‑Year  
       
Class I Shares at NAV
       7.60        0.91        2.07
       
S&P Municipal Bond Index
       6.57        1.14        2.30
       
S&P Municipal Bond New Mexico Index
       5.64        1.33        2.05
       
Lipper Other States Municipal Debt Funds Classification Average
       7.08        0.43        1.54
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund Shares.
Updated Performance Information Location [Text Block] For most recent month‑end performance, go to https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or call (800) 257‑8787.
Net Assets $ 71,005,360
Holdings Count | Holding 80
Advisory Fees Paid, Amount $ 345,805
Investment Company Portfolio Turnover 16.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of May 31, 2026)
Fund net assets
   $ 71,005,360  
Total number of portfolio holdings
     80  
Portfolio turnover (%)
     16%  
Total management fees paid for the year
   $ 345,805  
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.
Material Fund Change [Text Block]
How has the Fund changed?
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or upon request at (800) 257‑8787.
Summary of Change Legend [Text Block]
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or upon request at (800) 257‑8787.
Updated Prospectus Phone Number (800) 257‑8787
Updated Prospectus Web Address https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
C000001497 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Pennsylvania Municipal Bond Fund
Class Name Class I Shares
Trading Symbol NBPAX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Class I Shares of the Nuveen Pennsylvania Municipal Bond Fund for the period of June 1, 2025 to May 31, 2026.
Shareholder Report Annual or Semi-Annual 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.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
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 year? (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
 
$63
 
0.60%
  *  
Annualized for period less than one year.
 
Expenses Paid, Amount $ 63
Expense Ratio, Percent 0.60% [13]
Factors Affecting Performance [Text Block]
How did the Fund perform last year? What affected the Fund’s performance?
Performance Highlights
 
The Nuveen Pennsylvania Municipal Bond Fund returned 8.33% for Class I Shares at net asset value (NAV) for the 12 months ended May 31, 2026. The Fund outperformed the S&P Municipal Bond Pennsylvania Index, which returned 6.74%.
 
Top contributors to relative performance
 
Duration positioning, especially an overweight to longer-duration bonds and an underweight to shorter-duration bonds.
 
Credit quality positioning, especially an overweight to non-rated bonds.
 
Sector positioning, especially an overweight to health care bonds.
 
Top detractors from relative performance
 
An overweight to pre-refunded bonds.
Performance Past Does Not Indicate Future [Text] Performance data shown represents past performance and does not predict or guarantee future results.
Line Graph [Table Text Block]
LOGO
Average Annual Return [Table Text Block]
Average Annual Total Returns
     
       1‑Year        5‑Year        10‑Year  
       
Class I Shares at NAV
       8.33        0.81        2.17
       
S&P Municipal Bond Index
       6.57        1.14        2.30
       
S&P Municipal Bond Pennsylvania Index
       6.74        1.15        2.42
       
Lipper Pennsylvania Municipal Debt Funds Classification Average
       7.19        0.56        1.93
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund Shares.
Updated Performance Information Location [Text Block] For most recent month‑end performance, go to https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or call (800) 257‑8787.
Net Assets $ 363,803,196
Holdings Count | Holding 251
Advisory Fees Paid, Amount $ 1,744,427
Investment Company Portfolio Turnover 16.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of May 31, 2026)
Fund net assets
   $ 363,803,196  
Total number of portfolio holdings
     251  
Portfolio turnover (%)
     16%  
Total management fees paid for the year
   $ 1,744,427  
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.
Material Fund Change [Text Block]
How has the Fund changed?
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or upon request at (800) 257‑8787.
Summary of Change Legend [Text Block]
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or upon request at (800) 257‑8787.
Updated Prospectus Phone Number (800) 257‑8787
Updated Prospectus Web Address https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
C000137697 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Pennsylvania Municipal Bond Fund
Class Name Class C Shares
Trading Symbol FPCCX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Class C Shares of the Nuveen Pennsylvania Municipal Bond Fund for the period of June 1, 2025 to May 31, 2026.
Shareholder Report Annual or Semi-Annual 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.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
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 year? (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
 
$166
 
1.60%
  *  
Annualized for period less than one year.
 
Expenses Paid, Amount $ 166
Expense Ratio, Percent 1.60% [14]
Factors Affecting Performance [Text Block]
How did the Fund perform last year? What affected the Fund’s performance?
Performance Highlights
 
The Nuveen Pennsylvania Municipal Bond Fund returned 7.26% for Class C Shares at net asset value (NAV) for the 12 months ended May 31, 2026. The Fund outperformed the S&P Municipal Bond Pennsylvania Index, which returned 6.74%.
 
Top contributors to relative performance
 
Duration positioning, especially an overweight to longer-duration bonds and an underweight to shorter-duration bonds.
 
Credit quality positioning, especially an overweight to non-rated bonds.
 
Sector positioning, especially an overweight to health care bonds.
 
Top detractors from relative performance
 
An overweight to pre-refunded bonds.
 
Performance Past Does Not Indicate Future [Text] Performance data shown represents past performance and does not predict or guarantee future results.
Line Graph [Table Text Block]
LOGO
Average Annual Return [Table Text Block]
Average Annual Total Returns
     
       1-Year        5-Year        10-Year  
       
Class C Shares at NAV (excluding maximum sales charge)
       7.26        (0.18 )%         1.32
       
S&P Municipal Bond Index
       6.57        1.14        2.30
       
S&P Municipal Bond Pennsylvania Index
       6.74        1.15        2.42
       
Lipper Pennsylvania Municipal Debt Funds Classification Average
       7.19        0.56        1.93
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund Shares.
Updated Performance Information Location [Text Block] For most recent month-end performance, go to https://www.nuveen.com/en-us/mutual-funds/prospectuses or call (800) 257‑8787.
Net Assets $ 363,803,196
Holdings Count | Holding 251
Advisory Fees Paid, Amount $ 1,744,427
Investment Company Portfolio Turnover 16.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of May 31, 2026)
Fund net assets
   $ 363,803,196  
Total number of portfolio holdings
     251  
Portfolio turnover (%)
     16%  
Total management fees paid for the year
   $ 1,744,427  
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.
Material Fund Change [Text Block]
How has the Fund changed?
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en-us/mutual-funds/prospectuses or upon request at (800) 257-8787.
Summary of Change Legend [Text Block]
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en-us/mutual-funds/prospectuses or upon request at (800) 257-8787.
Updated Prospectus Phone Number (800) 257-8787
Updated Prospectus Web Address https://www.nuveen.com/en-us/mutual-funds/prospectuses
C000001494 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Pennsylvania Municipal Bond Fund
Class Name Class A Shares
Trading Symbol FPNTX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Class A Shares of the Nuveen Pennsylvania Municipal Bond Fund for the period of June 1, 2025 to May 31, 2026.
Shareholder Report Annual or Semi-Annual 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.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
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 year? (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
 
$83
 
0.80%
  *  
Annualized for period less than one year.
 
Expenses Paid, Amount $ 83
Expense Ratio, Percent 0.80% [15]
Factors Affecting Performance [Text Block]
How did the Fund perform last year? What affected the Fund’s performance?
Performance Highlights
 
The Nuveen Pennsylvania Municipal Bond Fund returned 8.12% for Class A Shares at net asset value (NAV) for the 12 months ended May 31, 2026. The Fund outperformed the S&P Municipal Bond Pennsylvania Index, which returned 6.74%.
 
Top contributors to relative performance
 
Duration positioning, especially an overweight to longer-duration bonds and an underweight to shorter-duration bonds.
 
Credit quality positioning, especially an overweight to non-rated bonds.
 
Sector positioning, especially an overweight to health care bonds.
 
Top detractors from relative performance
 
An overweight to pre-refunded bonds.
 
Performance Past Does Not Indicate Future [Text] Performance data shown represents past performance and does not predict or guarantee future results.
Line Graph [Table Text Block]
LOGO
Average Annual Return [Table Text Block]
Average Annual Total Returns
     
       1-Year        5-Year        10-Year  
       
Class A Shares at NAV (excluding maximum sales charge)
       8.12        0.62        1.97
       
Class A Shares at maximum sales charge (Offering Price)
       3.59        (0.24 )%         1.53
       
S&P Municipal Bond Index
       6.57        1.14        2.30
       
S&P Municipal Bond Pennsylvania Index
       6.74        1.15        2.42
       
Lipper Pennsylvania Municipal Debt Funds Classification Average
       7.19        0.56        1.93
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund Shares.
Updated Performance Information Location [Text Block] For most recent month-end performance, go to https://www.nuveen.com/en-us/mutual-funds/prospectuses or call (800) 257‑8787.
Net Assets $ 363,803,196
Holdings Count | Holding 251
Advisory Fees Paid, Amount $ 1,744,427
Investment Company Portfolio Turnover 16.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of May 31, 2026)
Fund net assets
   $ 363,803,196  
Total number of portfolio holdings
     251  
Portfolio turnover (%)
     16%  
Total management fees paid for the year
   $ 1,744,427  
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.
Material Fund Change [Text Block]
How has the Fund changed?
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en-us/mutual-funds/prospectuses or upon request at (800) 257-8787.
Summary of Change Legend [Text Block]
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en-us/mutual-funds/prospectuses or upon request at (800) 257-8787.
Updated Prospectus Phone Number (800) 257-8787
Updated Prospectus Web Address https://www.nuveen.com/en-us/mutual-funds/prospectuses
C000001498 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Virginia Municipal Bond Fund
Class Name Class A Shares
Trading Symbol FVATX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Class A Shares of the Nuveen Virginia Municipal Bond Fund for the period of June 1, 2025 to May 31, 2026.
Shareholder Report Annual or Semi-Annual 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.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
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 year? (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
 
$75
 
0.72%
  *  
Annualized for period less than one year.
 
Expenses Paid, Amount $ 75
Expense Ratio, Percent 0.72% [16]
Factors Affecting Performance [Text Block]
How did the Fund perform last year? What affected the Fund’s performance?
Performance Highlights
 
The Nuveen Virginia Municipal Bond Fund returned 7.18% for Class A Shares at net asset value (NAV) for the 12 months ended May 31, 2026. The Fund outperformed the S&P Municipal Bond Virginia Index, which returned 6.53%.
 
Top contributors to relative performance
 
Duration positioning, especially an overweight to bonds with durations of eight years and longer and an underweight to bonds with durations of four years and shorter.
 
Credit quality positioning, especially overweights to non-rated, A-rated and BBB-rated bonds.
 
An underweight to the tax-backed bond sector and overweights to the transportation and hospital bond sectors.
 
Top detractors from relative performance
 
Tobacco bonds.
Performance Past Does Not Indicate Future [Text] Performance data shown represents past performance and does not predict or guarantee future results.
Line Graph [Table Text Block]
LOGO
Average Annual Return [Table Text Block]
Average Annual Total Returns
     
       1‑Year        5‑Year        10‑Year  
       
Class A Shares at NAV (excluding maximum sales charge)
       7.18        0.41        1.82
       
Class A Shares at maximum sales charge (Offering Price)
       2.71        (0.45 )%         1.39
       
S&P Municipal Bond Index
       6.57        1.14        2.30
       
S&P Municipal Bond Virginia Index
       6.53        1.10        2.15
       
Lipper Virginia Municipal Debt Funds Classification Average
       7.18        0.39        1.52
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund Shares.
Updated Performance Information Location [Text Block] For most recent month‑end performance, go to https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or call (800) 257‑8787.
Net Assets $ 573,126,989
Holdings Count | Holding 254
Advisory Fees Paid, Amount $ 2,663,673
Investment Company Portfolio Turnover 10.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of May 31, 2026)
Fund net assets
   $ 573,126,989  
Total number of portfolio holdings
     254  
Portfolio turnover (%)
     10%  
Total management fees paid for the year
   $ 2,663,673  
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.
Material Fund Change [Text Block]
How has the Fund changed?
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en-us/mutual-funds/prospectuses or upon request at (800) 257-8787.
Summary of Change Legend [Text Block]
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en-us/mutual-funds/prospectuses or upon request at (800) 257-8787.
Updated Prospectus Phone Number (800) 257-8787
Updated Prospectus Web Address https://www.nuveen.com/en-us/mutual-funds/prospectuses
C000137698 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Virginia Municipal Bond Fund
Class Name Class C Shares
Trading Symbol FVCCX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Class C Shares of the Nuveen Virginia Municipal Bond Fund for the period of June 1, 2025 to May 31, 2026.
Shareholder Report Annual or Semi-Annual 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.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
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 year? (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
 
$157
 
1.52%
  *  
Annualized for period less than one year.
 
Expenses Paid, Amount $ 157
Expense Ratio, Percent 1.52% [17]
Factors Affecting Performance [Text Block]
How did the Fund perform last year? What affected the Fund’s performance?
Performance Highlights
 
The Nuveen Virginia Municipal Bond Fund returned 6.33% for Class C Shares at net asset value (NAV) for the 12 months ended May 31, 2026. The Fund performed in line with the S&P Municipal Bond Virginia Index, which returned 6.53%.
 
Top contributors to relative performance
 
Duration positioning, especially an overweight to bonds with durations of eight years and longer and an underweight to bonds with durations of four years and shorter.
 
Credit quality positioning, especially overweights to non‑rated, A‑rated and BBB‑rated bonds.
 
An underweight to the tax‑backed bond sector and overweights to the transportation and hospital bond sectors.
 
Top detractors from relative performance
 
Tobacco bonds.
 
Performance Past Does Not Indicate Future [Text] Performance data shown represents past performance and does not predict or guarantee future results.
Line Graph [Table Text Block]
LOGO
Average Annual Return [Table Text Block]
Average Annual Total Returns
     
       1‑Year        5‑Year        10‑Year  
       
Class C Shares at NAV (excluding maximum sales charge)
       6.33        (0.39 )%         1.17
       
S&P Municipal Bond Index
       6.57        1.14        2.30
       
S&P Municipal Bond Virginia Index
       6.53        1.10        2.15
       
Lipper Virginia Municipal Debt Funds Classification Average
       7.18        0.39        1.52
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund Shares.
Updated Performance Information Location [Text Block] For most recent month-end performance, go to https://www.nuveen.com/en-us/mutual-funds/prospectuses or call (800) 257‑8787.
Net Assets $ 573,126,989
Holdings Count | Holding 254
Advisory Fees Paid, Amount $ 2,663,673
Investment Company Portfolio Turnover 10.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of May 31, 2026)
Fund net assets
   $ 573,126,989  
Total number of portfolio holdings
     254  
Portfolio turnover (%)
     10%  
Total management fees paid for the year
   $ 2,663,673  
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.
Material Fund Change [Text Block]
How has the Fund changed?
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en-us/mutual-funds/prospectuses or upon request at (800) 257-8787.
Summary of Change Legend [Text Block]
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en-us/mutual-funds/prospectuses or upon request at (800) 257-8787.
Updated Prospectus Phone Number (800) 257-8787
Updated Prospectus Web Address https://www.nuveen.com/en-us/mutual-funds/prospectuses
C000001501 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Virginia Municipal Bond Fund
Class Name Class I Shares
Trading Symbol NMVAX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Class I Shares of the Nuveen Virginia Municipal Bond Fund for the period of June 1, 2025 to May 31, 2026.
Shareholder Report Annual or Semi-Annual 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.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
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 year? (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
 
$54
 
0.52%
  *  
Annualized for period less than one year.
 
Expenses Paid, Amount $ 54
Expense Ratio, Percent 0.52% [18]
Factors Affecting Performance [Text Block]
How did the Fund perform last year? What affected the Fund’s performance?
Performance Highlights
 
The Nuveen Virginia Municipal Bond Fund returned 7.49% for Class I Shares at net asset value (NAV) for the 12 months ended May 31, 2026. The Fund outperformed the S&P Municipal Bond Virginia Index, which returned 6.53%.
 
Top contributors to relative performance
 
Duration positioning, especially an overweight to bonds with durations of eight years and longer and an underweight to bonds with durations of four years and shorter.
 
Credit quality positioning, especially overweights to non‑rated, A‑rated and BBB‑rated bonds.
 
An underweight to the tax‑backed bond sector and overweights to the transportation and hospital bond sectors.
 
Top detractors from relative performance
 
Tobacco bonds.
Performance Past Does Not Indicate Future [Text] Performance data shown represents past performance and does not predict or guarantee future results.
Line Graph [Table Text Block]
LOGO
Average Annual Return [Table Text Block]
Average Annual Total Returns
     
       1‑Year        5‑Year        10‑Year  
       
Class I Shares at NAV
       7.49        0.62        2.02
       
S&P Municipal Bond Index
       6.57        1.14        2.30
       
S&P Municipal Bond Virginia Index
       6.53        1.10        2.15
       
Lipper Virginia Municipal Debt Funds Classification Average
       7.18        0.39        1.52
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund Shares.
Updated Performance Information Location [Text Block] For most recent month‑end performance, go to https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or call (800) 257‑8787.
Net Assets $ 573,126,989
Holdings Count | Holding 254
Advisory Fees Paid, Amount $ 2,663,673
Investment Company Portfolio Turnover 10.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of May 31, 2026)
Fund net assets
   $ 573,126,989  
Total number of portfolio holdings
     254  
Portfolio turnover (%)
     10%  
Total management fees paid for the year
   $ 2,663,673  
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.
Material Fund Change [Text Block]
How has the Fund changed?
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or upon request at (800) 257‑8787.
Summary of Change Legend [Text Block]
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by September 30, 2026 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses or upon request at (800) 257‑8787.
Updated Prospectus Phone Number (800) 257‑8787
Updated Prospectus Web Address https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
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