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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
NUVEEN NEBRASKA MUNICIPAL BOND FUND
SUPPLEMENT DATED JUNE 1, 2022
TO THE PROSPECTUS DATED SEPTEMBER 30, 2021
1.
The section “Fund Summaries—Nuveen Nebraska Municipal Bond Fund—Fees and Expenses of the Fund—Annual Fund Operating Expenses” is deleted in its entirety and replaced with the following:
Annual Fund Operating Expenses
(expenses that you pay each year as a percentage of the value of your investment)
      Class A      Class C      Class I   
Management Fees
      0.52%         0.52%         0.52%   
Distribution and/or Service (12b‑1) Fees      0.20%         1.00%         0.00%   
Other Expenses
      0.16%         0.16%         0.16%   
Total Annual Fund Operating Expenses      0.88%         1.68%         0.68%   
Fee Waivers and/or Expense Reimbursements3,4
      (0.06)%        (0.06)%        (0.06)%  
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements      0.82%         1.62%         0.62%   
  1
The contingent deferred sales charge on Class C shares applies only to redemptions within 12 months of purchase.
  2
Fee applies to the following types of accounts under $1,000 held directly with the Fund: accounts established pursuant to the Uniform Transfers to Minors Act (UTMA) or Uniform Gifts to Minors Act (UGMA).
  3
Fee Waivers and/or Expense Reimbursements have been restated to reflect current fees.
  4
The Fund’s investment adviser has agreed to waive fees and/or reimburse expenses through July 31, 2024 so that the total annual operating expenses of the Fund (excluding 12b‑1 distribution and/or service fees, interest expenses, taxes, acquired fund fees and expenses, fees incurred in acquiring and disposing of portfolio securities and extraordinary expenses) do not exceed 0.65% of the average daily net assets of any class of Fund shares. This expense limitation may be terminated or modified prior to July 31, 2024 only with the approval of the Board of Directors of the Fund.
2.
The section “Fund Summaries—Nuveen Nebraska Municipal Bond Fund—Fees and Expenses of the Fund—Example” is deleted in its entirety and replaced with the following:
Example
The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then either redeem or do not redeem your shares at the end of a period. The example also assumes that your investment has a 5% return each year, that the Fund’s operating expenses remain the same and that the fee waivers currently in place are not renewed beyond July 31, 2024. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
 
      Class A      Class C      Class I  
1 Year
    $ 500      $ 165      $ 63   
3 Years    $ 676      $ 517      $ 204   
5 Years
    $ 875      $ 900      $ 365   
10 Years    $ 1,447      $ 1,976      $ 834   
Nuveen Nebraska Municipal Bond Fund  
Risk/Return: rr_RiskReturnAbstract  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
NUVEEN NEBRASKA MUNICIPAL BOND FUND
SUPPLEMENT DATED JUNE 1, 2022
TO THE PROSPECTUS DATED SEPTEMBER 30, 2021
1.
The section “Fund Summaries—Nuveen Nebraska Municipal Bond Fund—Fees and Expenses of the Fund—Annual Fund Operating Expenses” is deleted in its entirety and replaced with the following:
Annual Fund Operating Expenses
(expenses that you pay each year as a percentage of the value of your investment)
      Class A      Class C      Class I   
Management Fees
      0.52%         0.52%         0.52%   
Distribution and/or Service (12b‑1) Fees      0.20%         1.00%         0.00%   
Other Expenses
      0.16%         0.16%         0.16%   
Total Annual Fund Operating Expenses      0.88%         1.68%         0.68%   
Fee Waivers and/or Expense Reimbursements3,4
      (0.06)%        (0.06)%        (0.06)%  
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements      0.82%         1.62%         0.62%   
  1
The contingent deferred sales charge on Class C shares applies only to redemptions within 12 months of purchase.
  2
Fee applies to the following types of accounts under $1,000 held directly with the Fund: accounts established pursuant to the Uniform Transfers to Minors Act (UTMA) or Uniform Gifts to Minors Act (UGMA).
  3
Fee Waivers and/or Expense Reimbursements have been restated to reflect current fees.
  4
The Fund’s investment adviser has agreed to waive fees and/or reimburse expenses through July 31, 2024 so that the total annual operating expenses of the Fund (excluding 12b‑1 distribution and/or service fees, interest expenses, taxes, acquired fund fees and expenses, fees incurred in acquiring and disposing of portfolio securities and extraordinary expenses) do not exceed 0.65% of the average daily net assets of any class of Fund shares. This expense limitation may be terminated or modified prior to July 31, 2024 only with the approval of the Board of Directors of the Fund.
2.
The section “Fund Summaries—Nuveen Nebraska Municipal Bond Fund—Fees and Expenses of the Fund—Example” is deleted in its entirety and replaced with the following:
Example
The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then either redeem or do not redeem your shares at the end of a period. The example also assumes that your investment has a 5% return each year, that the Fund’s operating expenses remain the same and that the fee waivers currently in place are not renewed beyond July 31, 2024. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
 
      Class A      Class C      Class I  
1 Year
    $ 500      $ 165      $ 63   
3 Years    $ 676      $ 517      $ 204   
5 Years
    $ 875      $ 900      $ 365   
10 Years    $ 1,447      $ 1,976      $ 834   
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination July 31, 2024
Expenses Deferred Charges [Text Block] rr_ExpensesDeferredChargesTextBlock The contingent deferred sales charge on Class C shares applies only to redemptions within 12 months of purchase.
Expenses Restated to Reflect Current [Text] rr_ExpensesRestatedToReflectCurrent Fee Waivers and/or Expense Reimbursements have been restated to reflect current fees.
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then either redeem or do not redeem your shares at the end of a period. The example also assumes that your investment has a 5% return each year, that the Fund’s operating expenses remain the same and that the fee waivers currently in place are not renewed beyond July 31, 2024. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
 
Nuveen Nebraska Municipal Bond Fund | Class A  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.52%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.20%
Other Expenses rr_OtherExpensesOverAssets 0.16%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.88%
Fee Waivers and/or Expense Reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.06%) [1],[2]
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements rr_NetExpensesOverAssets 0.82%
1 Year rr_ExpenseExampleYear01 $ 500
3 Years rr_ExpenseExampleYear03 676
5 Years rr_ExpenseExampleYear05 875
10 Years rr_ExpenseExampleYear10 1,447
1 Year rr_ExpenseExampleNoRedemptionYear01 500
3 Years rr_ExpenseExampleNoRedemptionYear03 676
5 Years rr_ExpenseExampleNoRedemptionYear05 875
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,447
Nuveen Nebraska Municipal Bond Fund | Class C  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.52%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.16%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.68%
Fee Waivers and/or Expense Reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.06%) [1],[2]
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements rr_NetExpensesOverAssets 1.62%
1 Year rr_ExpenseExampleYear01 $ 165
3 Years rr_ExpenseExampleYear03 517
5 Years rr_ExpenseExampleYear05 900
10 Years rr_ExpenseExampleYear10 1,976
1 Year rr_ExpenseExampleNoRedemptionYear01 165
3 Years rr_ExpenseExampleNoRedemptionYear03 517
5 Years rr_ExpenseExampleNoRedemptionYear05 900
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,976
Nuveen Nebraska Municipal Bond Fund | Class I  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.52%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.16%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.68%
Fee Waivers and/or Expense Reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.06%) [1],[2]
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements rr_NetExpensesOverAssets 0.62%
1 Year rr_ExpenseExampleYear01 $ 63
3 Years rr_ExpenseExampleYear03 204
5 Years rr_ExpenseExampleYear05 365
10 Years rr_ExpenseExampleYear10 834
1 Year rr_ExpenseExampleNoRedemptionYear01 63
3 Years rr_ExpenseExampleNoRedemptionYear03 204
5 Years rr_ExpenseExampleNoRedemptionYear05 365
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 834
[1]
Fee Waivers and/or Expense Reimbursements have been restated to reflect current fees.
[2]
The Fund’s investment adviser has agreed to waive fees and/or reimburse expenses through July 31, 2024 so that the total annual operating expenses of the Fund (excluding 12b‑1 distribution and/or service fees, interest expenses, taxes, acquired fund fees and expenses, fees incurred in acquiring and disposing of portfolio securities and extraordinary expenses) do not exceed 0.65% of the average daily net assets of any class of Fund shares. This expense limitation may be terminated or modified prior to July 31, 2024 only with the approval of the Board of Directors of the Fund.