Nuveen Large Cap Select Fund (FLRAX) N-CSR 6 Aug 24 Certified annual shareholder report (management investment company) Financial data

Form N-CSR Cover

Form N-CSR Cover	12 Months Ended
	May 31, 2024
Shareholder Report [Line Items]
Document Type	N-CSR
Amendment Flag	false
Registrant Name	NUVEEN INVESTMENT FUNDS INC
Entity Central Index Key	0000820892
Document Period End Date	May 31, 2024

Shareholder Report

Shareholder Report	12 Months Ended
	May 31, 2024 USD ($) Holding
Shareholder Report [Line Items]
Document Type	N-CSR
Amendment Flag	false
Registrant Name	NUVEEN INVESTMENT FUNDS INC
Entity Central Index Key	0000820892
Document Period End Date	May 31, 2024
C000015136 [Member]
Shareholder Report [Line Items]
Fund Name	Nuveen Minnesota Municipal Bond Fund
Class Name	Class A Shares
Trading Symbol	FJMNX
Annual or Semi-Annual Statement [Text Block]	This annual shareholder report contains important information about the Class A Shares of the Nuveen Minnesota Municipal Bond Fund for the period of June 1, 2023 to May 31, 2024.
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 0.79%
Expenses Paid, Amount	$ 79
Expense Ratio, Percent	0.79%
Factors Affecting Performance [Text Block]	How did the Fund perform last year? What affected the Fund’s performance? Performance Highlights •  The Nuveen Minnesota Municipal Bond Fund returned 2.99% for Class A shares at net asset value (NAV) for the 12 months ended May 31, 2024. The Fund outperformed the S&P Municipal Bond Minnesota Index, which returned 2.10%. •  Top contributors to relative performance »   Duration positioning, particularly an underweight to bonds with four- to eight-year durations and an overweight to the longest-duration bonds. »   Credit ratings allocation, specifically an underweight to the highest credit quality (AAA and AA rated) bonds, which underperformed, and overweight to bonds rated A and lower (especially non-rated), which benefited from narrowing credit spreads. »   Sector and security selection across a diverse group of positions. •  Top detractors from relative performance »   Underweight to zero to two-year duration bonds, a segment that performed well. »   Hospital bonds in the six- to eight-year duration range, which underperformed. Performance Attribution
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]
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) 2.99 % 0.48 % 2.10 % Class A Shares at maximum sales charge (Offering Price) (1.35 )% (0.38 )% 1.66 % S&P Municipal Bond Index 2.88 % 1.06 % 2.30 % S&P Municipal Bond Minnesota Index 2.10 % 0.82 % 1.99 % Lipper Minnesota Municipal Debt Funds Classification Average 2.45 % 0.25 % 1.57 %
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	$ 603,793,151
Holdings Count | Holding	375
Advisory Fees Paid, Amount	$ 2,827,072
Investment Company Portfolio Turnover	26%
Additional Fund Statistics [Text Block]	Fund Statistics (as of May 31, 2024) Fund net assets $ 603,793,151 Total number of portfolio holdings 375 Portfolio turnover (%) 26% Total advisory fees paid for the year $ 2,827,072
Holdings [Text Block]	(1)
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? • Portfolio manager updates: • Management fees: For more complete information, you may review the Fund’s next prospectus, which is expected to be available by October 1, 2024 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Material Fund Change Expenses [Text Block]	• Management fees:
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 October 1, 2024 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Updated Prospectus Phone Number	(800) 257‑8787
Updated Prospectus Web Address	https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
C000015138 [Member]
Shareholder Report [Line Items]
Fund Name	Nuveen Minnesota Municipal Bond Fund
Class Name	Class I Shares
Trading Symbol	FYMNX
Annual or Semi-Annual Statement [Text Block]	This annual shareholder report contains important information about the Class I Shares of the Nuveen Minnesota Municipal Bond Fund for the period of June 1, 2023 to May 31, 2024.
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 $59 0.59%
Expenses Paid, Amount	$ 59
Expense Ratio, Percent	0.59%
Factors Affecting Performance [Text Block]	How did the Fund perform last year? What affected the Fund’s performance? Performance Highlights •  The Nuveen Minnesota Municipal Bond Fund returned 3.29% for Class I shares at net asset value (NAV) for the 12 months ended May 31, 2024. The Fund outperformed the S&P Municipal Bond Minnesota Index, which returned 2.10%. •  Top contributors to relative performance »   Duration positioning, particularly an underweight to bonds with four- to eight-year durations and an overweight to the longest-duration bonds. »   Credit ratings allocation, specifically an underweight to the highest credit quality (AAA and AA rated) bonds, which underperformed, and overweight to bonds rated A and lower (especially non-rated), which benefited from narrowing credit spreads. »   Sector and security selection across a diverse group of positions. •  Top detractors from relative performance »   Underweight to zero to two-year duration bonds, a segment that performed well. »   Hospital bonds in the six- to eight-year duration range, which underperformed. Performance Attribution
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]
Average Annual Return [Table Text Block]	Average Annual Total Returns 1‑Year 5‑Year 10‑Year Class I Shares at NAV 3.29 % 0.69 % 2.31 % S&P Municipal Bond Index 2.88 % 1.06 % 2.30 % S&P Municipal Bond Minnesota Index 2.10 % 0.82 % 1.99 % Lipper Minnesota Municipal Debt Funds Classification Average 2.45 % 0.25 % 1.57 %
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	$ 603,793,151
Holdings Count | Holding	375
Advisory Fees Paid, Amount	$ 2,827,072
Investment Company Portfolio Turnover	26%
Additional Fund Statistics [Text Block]	Fund Statistics (as of May 31, 2024) Fund net assets $ 603,793,151 Total number of portfolio holdings 375 Portfolio turnover (%) 26% Total advisory fees paid for the year $ 2,827,072
Holdings [Text Block]	(1)
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? • Portfolio manager updates: • Management fees: For more complete information, you may review the Fund’s next prospectus, which is expected to be available by October 1, 2024 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Material Fund Change Expenses [Text Block]	• Management fees:
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 October 1, 2024 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Updated Prospectus Phone Number	(800) 257‑8787
Updated Prospectus Web Address	https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
C000137679 [Member]
Shareholder Report [Line Items]
Fund Name	Nuveen Minnesota Municipal Bond Fund
Class Name	Class C Shares
Trading Symbol	NTCCX
Annual or Semi-Annual Statement [Text Block]	This annual shareholder report contains important information about the Class C Shares of the Nuveen Minnesota Municipal Bond Fund for the period of June 1, 2023 to May 31, 2024.
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 Costs paid as a percentage of Class C Shares $159 1.59%
Expenses Paid, Amount	$ 159
Expense Ratio, Percent	1.59%
Factors Affecting Performance [Text Block]	How did the Fund perform last year? What affected the Fund’s performance? Performance Highlights •  The Nuveen Minnesota Municipal Bond Fund returned 2.16% for Class C shares at net asset value (NAV) for the 12 months ended May 31, 2024. The Fund performed in line with the S&P Municipal Bond Minnesota Index, which returned 2.10%. •  Top contributors to relative performance »   Duration positioning, particularly an underweight to bonds with four- to eight-year durations and an overweight to the longest-duration bonds. »   Credit ratings allocation, specifically an underweight to the highest credit quality (AAA and AA rated) bonds, which underperformed, and overweight to bonds rated A and lower (especially non-rated), which benefited from narrowing credit spreads. »   Sector and security selection across a diverse group of positions. •  Top detractors from relative performance »   Underweight to zero to two-year duration bonds, a segment that performed well. »   Hospital bonds in the six- to eight-year duration range, which underperformed. Performance Attribution
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]
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) 2.16 % (0.32 )% 1.45 % S&P Municipal Bond Index 2.88 % 1.06 % 2.30 % S&P Municipal Bond Minnesota Index 2.10 % 0.82 % 1.99 % Lipper Minnesota Municipal Debt Funds Classification Average 2.45 % 0.25 % 1.57 %
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	$ 603,793,151
Holdings Count | Holding	375
Advisory Fees Paid, Amount	$ 2,827,072
Investment Company Portfolio Turnover	26%
Additional Fund Statistics [Text Block]	Fund Statistics (as of May 31, 2024) Fund net assets $ 603,793,151 Total number of portfolio holdings 375 Portfolio turnover (%) 26% Total advisory fees paid for the year $ 2,827,072
Holdings [Text Block]	(1)
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? • Portfolio manager updates: • Management fees: For more complete information, you may review the Fund’s next prospectus, which is expected to be available by October 1, 2024 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Material Fund Change Expenses [Text Block]	• Management fees:
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 October 1, 2024 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Updated Prospectus Phone Number	(800) 257‑8787
Updated Prospectus Web Address	https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
C000015139 [Member]
Shareholder Report [Line Items]
Fund Name	Nuveen Nebraska Municipal Bond Fund
Class Name	Class A Shares
Trading Symbol	FNTAX
Annual or Semi-Annual Statement [Text Block]	This annual shareholder report contains important information about the Class A Shares of the Nuveen Nebraska Municipal Bond Fund for the period of June 1, 2023 to May 31, 2024.
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 Costs paid as a percentage of Class A Shares $81 0.81%
Expenses Paid, Amount	$ 81
Expense Ratio, Percent	0.81%
Factors Affecting Performance [Text Block]	How did the Fund perform last year? What affected the Fund’s performance? Performance Highlights •  The Nuveen Nebraska Municipal Bond Fund returned 1.75% for Class A shares at net asset value (NAV) for the 12 months ended May 31, 2024. The Fund underperformed the S&P Municipal Bond Nebraska Index, which returned 2.41%. •  Top detractors from relative performance »   Overweight to long-duration life care bonds, which underperformed. »   Underweight to the industrial development revenue (IDR) sector, which outperformed. »   Overweight to six- to eight-year duration bonds, which underperformed as the yield curve flattened. •  Top contributors to relative performance »   Duration positioning, especially an overweight to bonds with eight years and longer durations, which benefited from the yield curve flattening. »   Credit ratings allocation, primarily an underweight to the highest credit quality (AAA and AA rated) bonds, which underperformed, and an overweight to bonds rated A and below, including non-rated, which benefited from narrowing credit spreads. Performance Attribution
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]
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) 1.75 % (0.16 )% 1.53 % Class A Shares at maximum sales charge (Offering Price) (2.56 )% (1.01 )% 1.09 % S&P Municipal Bond Index 2.88 % 1.06 % 2.30 % S&P Municipal Bond Nebraska Index 2.41 % 0.80 % 2.16 % Lipper Other States Municipal Debt Funds Classification Average 2.59 % 0.29 % 1.56 %
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	$ 73,612,168
Holdings Count | Holding	90
Advisory Fees Paid, Amount	$ 447,722
Investment Company Portfolio Turnover	20%
Additional Fund Statistics [Text Block]	Fund Statistics (as of May 31, 2024) Fund net assets $ 73,612,168 Total number of portfolio holdings 90 Portfolio turnover (%) 20% Total advisory fees paid for the year $ 447,722
Holdings [Text Block]	(1)
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? • Portfolio manager update: • Management fees: For more complete information, you may review the Fund’s next prospectus, which is expected to be available by October 1, 2024 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Material Fund Change Expenses [Text Block]	• Management fees:
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 October 1, 2024 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Updated Prospectus Phone Number	(800) 257‑8787
Updated Prospectus Web Address	https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
C000015141 [Member]
Shareholder Report [Line Items]
Fund Name	Nuveen Nebraska Municipal Bond Fund
Class Name	Class I Shares
Trading Symbol	FNTYX
Annual or Semi-Annual Statement [Text Block]	This annual shareholder report contains important information about the Class I Shares of the Nuveen Nebraska Municipal Bond Fund for the period of June 1, 2023 to May 31, 2024.
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 Costs paid as a percentage of Class I Shares $61 0.61%
Expenses Paid, Amount	$ 61
Expense Ratio, Percent	0.61%
Factors Affecting Performance [Text Block]	How did the Fund perform last year? What affected the Fund’s performance? Performance Highlights •  The Nuveen Nebraska Municipal Bond Fund returned 1.95% for Class I shares at net asset value (NAV) for the 12 months ended May 31, 2024. The Fund underperformed the S&P Municipal Bond Nebraska Index, which returned 2.41%. •  Top detractors from relative performance »   Overweight to long-duration life care bonds, which underperformed. »   Underweight to the industrial development revenue (IDR) sector, which outperformed. »   Overweight to six- to eight-year duration bonds, which underperformed as the yield curve flattened. •  Top contributors to relative performance »   Duration positioning, especially an overweight to bonds with eight years and longer durations, which benefited from the yield curve flattening. »   Credit ratings allocation, primarily an underweight to the highest credit quality (AAA and AA rated) bonds, which underperformed, and an overweight to bonds rated A and below, including non-rated, which benefited from narrowing credit spreads. Performance Attribution
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]
Average Annual Return [Table Text Block]	Average Annual Total Returns 1‑Year 5‑Year 10‑Year Class I Shares at NAV 1.95 % 0.05 % 1.74 % S&P Municipal Bond Index 2.88 % 1.06 % 2.30 % S&P Municipal Bond Nebraska Index 2.41 % 0.80 % 2.16 % Lipper Other States Municipal Debt Funds Classification Average 2.59 % 0.29 % 1.56 %
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	$ 73,612,168
Holdings Count | Holding	90
Advisory Fees Paid, Amount	$ 447,722
Investment Company Portfolio Turnover	20%
Additional Fund Statistics [Text Block]	Fund Statistics (as of May 31, 2024) Fund net assets $ 73,612,168 Total number of portfolio holdings 90 Portfolio turnover (%) 20% Total advisory fees paid for the year $ 447,722
Holdings [Text Block]	(1)
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? • Portfolio manager update: • Management fees: For more complete information, you may review the Fund’s next prospectus, which is expected to be available by October 1, 2024 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Material Fund Change Expenses [Text Block]	• Management fees:
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 October 1, 2024 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Updated Prospectus Phone Number	(800) 257‑8787
Updated Prospectus Web Address	https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
C000137680 [Member]
Shareholder Report [Line Items]
Fund Name	Nuveen Nebraska Municipal Bond Fund
Class Name	Class C Shares
Trading Symbol	NAAFX
Annual or Semi-Annual Statement [Text Block]	This annual shareholder report contains important information about the Class C Shares of the Nuveen Nebraska Municipal Bond Fund for the period of June 1, 2023 to May 31, 2024.
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 Costs paid as a percentage of Class C Shares $161 1.61%
Expenses Paid, Amount	$ 161
Expense Ratio, Percent	1.61%
Factors Affecting Performance [Text Block]	How did the Fund perform last year? What affected the Fund’s performance? Performance Highlights •  The Nuveen Nebraska Municipal Bond Fund returned 0.93% for Class C shares at net asset value (NAV) for the 12 months ended May 31, 2024. The Fund underperformed the S&P Municipal Bond Nebraska Index, which returned 2.41%. •  Top detractors from relative performance »   Overweight to long-duration life care bonds, which underperformed. »   Underweight to the industrial development revenue (IDR) sector, which outperformed. »   Overweight to six- to eight-year duration bonds, which underperformed as the yield curve flattened. •  Top contributors to relative performance »   Duration positioning, especially an overweight to bonds with eight years and longer durations, which benefited from the yield curve flattening. »   Credit ratings allocation, primarily an underweight to the highest credit quality (AAA and AA rated) bonds, which underperformed, and an overweight to bonds rated A and below, including non-rated, which benefited from narrowing credit spreads. Performance Attribution
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]
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) 0.93 % (0.95 )% 0.87 % S&P Municipal Bond Index 2.88 % 1.06 % 2.30 % S&P Municipal Bond Nebraska Index 2.41 % 0.80 % 2.16 % Lipper Other States Municipal Debt Funds Classification Average 2.59 % 0.29 % 1.56 %
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	$ 73,612,168
Holdings Count | Holding	90
Advisory Fees Paid, Amount	$ 447,722
Investment Company Portfolio Turnover	20%
Additional Fund Statistics [Text Block]	Fund Statistics (as of May 31, 2024) Fund net assets $ 73,612,168 Total number of portfolio holdings 90 Portfolio turnover (%) 20% Total advisory fees paid for the year $ 447,722
Holdings [Text Block]	(1)
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 October 1, 2024 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
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 October 1, 2024 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Updated Prospectus Phone Number	(800) 257‑8787
Updated Prospectus Web Address	https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
C000015134 [Member]
Shareholder Report [Line Items]
Fund Name	Nuveen Minnesota Intermediate Municipal Bond Fund
Class Name	Class A Shares
Trading Symbol	FAMAX
Annual or Semi-Annual Statement [Text Block]	This annual shareholder report contains important information about the Class A Shares of the Nuveen Minnesota Intermediate Municipal Bond Fund for the period of June 1, 2023 to May 31, 2024.
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 0.81%
Expenses Paid, Amount	$ 81
Expense Ratio, Percent	0.81%
Factors Affecting Performance [Text Block]	How did the Fund perform last year? What affected the Fund’s performance? Performance Highlights •  The Nuveen Minnesota Intermediate Municipal Bond Fund returned 2.27% for Class A shares at net asset value (NAV) for the 12 months ended May 31, 2024. The Fund outperformed the S&P Municipal Bond Intermediate Index, which returned 1.99%. •  Top contributors to relative performance »   Credit ratings allocation, specifically an underweight to the highest credit quality (AAA and AA rated) bonds, which underperformed, and an overweight to bonds rated A and below, which benefited from narrowing credit spreads. »   Duration positioning, especially an overweight exposure to bonds with the shortest (zero to two years) and longest (10 years and longer) durations, which benefited from the yield curve flattening, and an underweight to bonds with two- to eight-year durations, which lagged. •  Top detractors from relative performance »   Allocation to state general obligation (GO) bonds with six- to eight-year durations, a segment that underperformed. »   Overweight to appropriation-backed bonds, which underperformed. »   Security selection across a range of holdings. Performance Attribution
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]
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) 2.27 % 0.64 % 1.77 % Class A Shares at maximum sales charge (Offering Price) (0.81 )% 0.04 % 1.46 % S&P Municipal Bond Index 2.88 % 1.06 % 2.30 % S&P Municipal Bond Intermediate Index 1.99 % 0.96 % 2.09 % Lipper Other States Intermediate Municipal Debt Funds Classification Average 1.84 % 0.31 % 1.29 %
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	$ 321,326,007
Holdings Count | Holding	286
Advisory Fees Paid, Amount	$ 1,721,106
Investment Company Portfolio Turnover	21%
Additional Fund Statistics [Text Block]	Fund Statistics (as of May 31, 2024) Fund net assets $ 321,326,007 Total number of portfolio holdings 286 Portfolio turnover (%) 21% Total advisory fees paid for the year $ 1,721,106
Holdings [Text Block]	(1)
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? • Portfolio manager updates: • Management fees: For more complete information, you may review the Fund’s next prospectus, which is expected to be available by October 1, 2024 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Material Fund Change Expenses [Text Block]	• Management fees:
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 October 1, 2024 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Updated Prospectus Phone Number	(800) 257‑8787
Updated Prospectus Web Address	https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
C000015135 [Member]
Shareholder Report [Line Items]
Fund Name	Nuveen Minnesota Intermediate Municipal Bond Fund
Class Name	Class I Shares
Trading Symbol	FAMTX
Annual or Semi-Annual Statement [Text Block]	This annual shareholder report contains important information about the Class I Shares of the Nuveen Minnesota Intermediate Municipal Bond Fund for the period of June 1, 2023 to May 31, 2024.
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 Costs paid as a percentage of Class I Shares $61 0.61%
Expenses Paid, Amount	$ 61
Expense Ratio, Percent	0.61%
Factors Affecting Performance [Text Block]	How did the Fund perform last year? What affected the Fund’s performance? Performance Highlights •  The Nuveen Minnesota Intermediate Municipal Bond Fund returned 2.47% for Class I shares at net asset value (NAV) for the 12 months ended May 31, 2024. The Fund outperformed the S&P Municipal Bond Intermediate Index, which returned 1.99%. •  Top contributors to relative performance »   Credit ratings allocation, specifically an underweight to the highest credit quality (AAA and AA rated) bonds, which underperformed, and an overweight to bonds rated A and below, which benefited from narrowing credit spreads. »   Duration positioning, especially an overweight exposure to bonds with the shortest (zero to two years) and longest (10 years and longer) durations, which benefited from the yield curve flattening, and an underweight to bonds with two- to eight-year durations, which lagged. •  Top detractors from relative performance »   Allocation to state general obligation (GO) bonds with six- to eight-year durations, a segment that underperformed. »   Overweight to appropriation-backed bonds, which underperformed. »   Security selection across a range of holdings. Performance Attribution
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]
Average Annual Return [Table Text Block]	Average Annual Total Returns 1‑Year 5‑Year 10‑Year Class I Shares at NAV 2.47 % 0.84 % 1.98 % S&P Municipal Bond Index 2.88 % 1.06 % 2.30 % S&P Municipal Bond Intermediate Index 1.99 % 0.96 % 2.09 % Lipper Other States Intermediate Municipal Debt Funds Classification Average 1.84 % 0.31 % 1.29 %
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	$ 321,326,007
Holdings Count | Holding	286
Advisory Fees Paid, Amount	$ 1,721,106
Investment Company Portfolio Turnover	21%
Additional Fund Statistics [Text Block]	Fund Statistics (as of May 31, 2024) Fund net assets $ 321,326,007 Total number of portfolio holdings 286 Portfolio turnover (%) 21% Total advisory fees paid for the year $ 1,721,106
Holdings [Text Block]	(1)
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? • Portfolio manager updates: • Management fees: For more complete information, you may review the Fund’s next prospectus, which is expected to be available by October 1, 2024 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Material Fund Change Expenses [Text Block]	• Management fees:
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 October 1, 2024 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Updated Prospectus Phone Number	(800) 257‑8787
Updated Prospectus Web Address	https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
C000137678 [Member]
Shareholder Report [Line Items]
Fund Name	Nuveen Minnesota Intermediate Municipal Bond Fund
Class Name	Class C Shares
Trading Symbol	NIBCX
Annual or Semi-Annual Statement [Text Block]	This annual shareholder report contains important information about the Class C Shares of the Nuveen Minnesota Intermediate Municipal Bond Fund for the period of June 1, 2023 to May 31, 2024.
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 Costs paid as a percentage of Class C Shares $161 1.61%
Expenses Paid, Amount	$ 161
Expense Ratio, Percent	1.61%
Factors Affecting Performance [Text Block]	How did the Fund perform last year? What affected the Fund’s performance? Performance Highlights •  The Nuveen Minnesota Intermediate Municipal Bond Fund returned 1.45% for Class C shares at net asset value (NAV) for the 12 months ended May 31, 2024. The Fund underperformed the S&P Municipal Bond Intermediate Index, which returned 1.99%. •  Top detractors from relative performance »   Allocation to state general obligation (GO) bonds with six- to eight-year durations, a segment that underperformed. »   Overweight to appropriation-backed bonds, which underperformed. »   Security selection across a range of holdings. •  Top contributors to relative performance »   Credit ratings allocation, specifically an underweight to the highest credit quality (AAA and AA rated) bonds, which underperformed, and an overweight to bonds rated A and below, which benefited from narrowing credit spreads. »   Duration positioning, especially an overweight exposure to bonds with the shortest (zero to two years) and longest (10 years and longer) durations, which benefited from the yield curve flattening, and an underweight to bonds with two- to eight-year durations, which lagged. Performance Attribution
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]
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) 1.45 % (0.16 )% 1.13 % S&P Municipal Bond Index 2.88 % 1.06 % 2.30 % S&P Municipal Bond Intermediate Index 1.99 % 0.96 % 2.09 % Lipper Other States Intermediate Municipal Debt Funds Classification Average 1.84 % 0.31 % 1.29 %
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	$ 321,326,007
Holdings Count | Holding	286
Advisory Fees Paid, Amount	$ 1,721,106
Investment Company Portfolio Turnover	21%
Additional Fund Statistics [Text Block]	Fund Statistics (as of May 31, 2024) Fund net assets $ 321,326,007 Total number of portfolio holdings 286 Portfolio turnover (%) 21% Total advisory fees paid for the year $ 1,721,106
Holdings [Text Block]	(1)
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? • Portfolio manager updates: • Management fees: For more complete information, you may review the Fund’s next prospectus, which is expected to be available by October 1, 2024 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Material Fund Change Expenses [Text Block]	• Management fees:
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 October 1, 2024 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Updated Prospectus Phone Number	(800) 257‑8787
Updated Prospectus Web Address	https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
C000015145 [Member]
Shareholder Report [Line Items]
Fund Name	Nuveen Oregon Intermediate Municipal Bond Fund
Class Name	Class A Shares
Trading Symbol	FOTAX
Annual or Semi-Annual Statement [Text Block]	This annual shareholder report contains important information about the Class A Shares of the Nuveen Oregon Intermediate Municipal Bond Fund for the period of June 1, 2023 to May 31, 2024.
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 Class A Shares $84 0.84%
Expenses Paid, Amount	$ 84
Expense Ratio, Percent	0.84%
Factors Affecting Performance [Text Block]	How did the Fund perform last year? What affected the Fund’s performance? Performance Highlights •  The Nuveen Oregon Intermediate Municipal Bond Fund returned 2.45% for Class A shares at net asset value (NAV) for the 12 months ended May 31, 2024. The Fund outperformed the S&P Municipal Bond Intermediate Index, which returned 1.99%. •  Top contributors to relative performance »   Security selection across a diverse group of holdings. »   Duration positioning, particularly an overweight to bonds with zero to two-year durations and an underweight to bonds with six- to eight-year durations. »   Underweight allocation to AAA rated bonds, which underperformed, and an overweight allocation to non-rated bonds, which outperformed as credit spreads narrowed. •  Top detractors from relative performance »   Overweight to AA rated bonds, which underperformed, and underweight allocation to A rated bonds, which outperformed as credit spreads contracted. »   Overweight to the local general obligation (GO) sector, which underperformed. Performance Attribution
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]
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) 2.45 % 0.48 % 1.49 % Class A Shares at maximum sales charge (Offering Price) (0.64 )% (0.12 )% 1.18 % S&P Municipal Bond Index 2.88 % 1.06 % 2.30 % S&P Municipal Bond Intermediate Index 1.99 % 0.96 % 2.09 % Lipper Other States Intermediate Municipal Debt Funds Classification Average 1.84 % 0.31 % 1.29 %
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	$ 182,137,946
Holdings Count | Holding	153
Advisory Fees Paid, Amount	$ 964,313
Investment Company Portfolio Turnover	20%
Additional Fund Statistics [Text Block]	Fund Statistics (as of May 31, 2024) Fund net assets $ 182,137,946 Total number of portfolio holdings 153 Portfolio turnover (%) 20% Total advisory fees paid for the year $ 964,313
Holdings [Text Block]	(1)
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 October 1, 2024 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
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 October 1, 2024 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Updated Prospectus Phone Number	(800) 257‑8787
Updated Prospectus Web Address	https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
C000015146 [Member]
Shareholder Report [Line Items]
Fund Name	Nuveen Oregon Intermediate Municipal Bond Fund
Class Name	Class I Shares
Trading Symbol	FORCX
Annual or Semi-Annual Statement [Text Block]	This annual shareholder report contains important information about the Class I Shares of the Nuveen Oregon Intermediate Municipal Bond Fund for the period of June 1, 2023 to May 31, 2024.
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 $64 0.64%
Expenses Paid, Amount	$ 64
Expense Ratio, Percent	0.64%
Factors Affecting Performance [Text Block]	How did the Fund perform last year? What affected the Fund’s performance? Performance Highlights •  The Nuveen Oregon Intermediate Municipal Bond Fund returned 2.64% for Class I shares at net asset value (NAV) for the 12 months ended May 31, 2024. The Fund outperformed the S&P Municipal Bond Intermediate Index, which returned 1.99%. •  Top contributors to relative performance »   Security selection across a diverse group of holdings. »   Duration positioning, particularly an overweight to bonds with zero to two-year durations and an underweight to bonds with six- to eight-year durations. »   Underweight allocation to AAA rated bonds, which underperformed, and an overweight allocation to non-rated bonds, which outperformed as credit spreads narrowed. •  Top detractors from relative performance »   Overweight to AA rated bonds, which underperformed, and underweight allocation to A rated bonds, which outperformed as credit spreads contracted. »   Overweight to the local general obligation (GO) sector, which underperformed. Performance Attribution
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]
Average Annual Return [Table Text Block]	Average Annual Total Returns 1‑Year 5‑Year 10‑Year Class I Shares at NAV 2.64 % 0.68 % 1.70 % S&P Municipal Bond Index 2.88 % 1.06 % 2.30 % S&P Municipal Bond Intermediate Index 1.99 % 0.96 % 2.09 % Lipper Other States Intermediate Municipal Debt Funds Classification Average 1.84 % 0.31 % 1.29 %
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	$ 182,137,946
Holdings Count | Holding	153
Advisory Fees Paid, Amount	$ 964,313
Investment Company Portfolio Turnover	20%
Additional Fund Statistics [Text Block]	Fund Statistics (as of May 31, 2024) Fund net assets $ 182,137,946 Total number of portfolio holdings 153 Portfolio turnover (%) 20% Total advisory fees paid for the year $ 964,313
Holdings [Text Block]	(1)
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 October 1, 2024 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
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 October 1, 2024 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Updated Prospectus Phone Number	(800) 257‑8787
Updated Prospectus Web Address	https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
C000137681 [Member]
Shareholder Report [Line Items]
Fund Name	Nuveen Oregon Intermediate Municipal Bond Fund
Class Name	Class C Shares
Trading Symbol	NAFOX
Annual or Semi-Annual Statement [Text Block]	This annual shareholder report contains important information about the Class C Shares of the Nuveen Oregon Intermediate Municipal Bond Fund for the period of June 1, 2023 to May 31, 2024.
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 Costs paid as a percentage of Class C Shares $164 1.64%
Expenses Paid, Amount	$ 164
Expense Ratio, Percent	1.64%
Factors Affecting Performance [Text Block]	How did the Fund perform last year? What affected the Fund’s performance? Performance Highlights •  The Nuveen Oregon Intermediate Municipal Bond Fund returned 1.52% for Class C shares at net asset value (NAV) for the 12 months ended May 31, 2024. The Fund underperformed the S&P Municipal Bond Intermediate Index, which returned 1.99%. •  Top detractors from relative performance »   Overweight to AA rated bonds, which underperformed, and underweight allocation to A rated bonds, which outperformed as credit spreads contracted. »   Overweight to the local general obligation (GO) sector, which underperformed. •  Top contributors to relative performance »   Security selection across a diverse group of holdings. »   Duration positioning, particularly an overweight to bonds with zero to two-year durations and an underweight to bonds with six- to eight-year durations. »   Underweight allocation to AAA rated bonds, which underperformed, and an overweight allocation to non-rated bonds, which outperformed as credit spreads narrowed. Performance Attribution
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]
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) 1.52 % (0.32 )% 0.84 % S&P Municipal Bond Index 2.88 % 1.06 % 2.30 % S&P Municipal Bond Intermediate Index 1.99 % 0.96 % 2.09 % Lipper Other States Intermediate Municipal Debt Funds Classification Average 1.84 % 0.31 % 1.29 %
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	$ 182,137,946
Holdings Count | Holding	153
Advisory Fees Paid, Amount	$ 964,313
Investment Company Portfolio Turnover	20%
Additional Fund Statistics [Text Block]	Fund Statistics (as of May 31, 2024) Fund net assets $ 182,137,946 Total number of portfolio holdings 153 Portfolio turnover (%) 20% Total advisory fees paid for the year $ 964,313
Holdings [Text Block]	(1)
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 October 1, 2024 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
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 October 1, 2024 at https://www.nuveen.com/en‑us/mutual‑funds/prospectuses
Updated Prospectus Phone Number	(800) 257‑8787
Updated Prospectus Web Address	https://www.nuveen.com/en‑us/mutual‑funds/prospectuses

Shareholder Report, Line Graph

Shareholder Report, Line Graph (Details) - USD ($)	12 Months Ended	60 Months Ended	120 Months Ended
	May 31, 2024	May 31, 2024	May 31, 2024	May 31, 2023	May 31, 2022	May 31, 2021	May 31, 2020	May 31, 2019	May 31, 2018	May 31, 2017	May 31, 2016	May 31, 2015	May 31, 2014
C000015136 [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Class A Shares at maximum sales charge (Offering Price)
Account Value	$ 11,795	$ 11,795	$ 11,795	$ 11,453	$ 11,537	$ 12,382	$ 11,791	$ 11,514	$ 10,902	$ 10,725	$ 10,627	$ 9,981	$ 9,580
Average Annual Return, Percent	(1.35%)	(0.38%)	1.66%
C000015136 [Member] | Without Sales Load [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Class A Shares at NAV (excluding maximum sales charge)
Account Value	$ 12,312	$ 12,312	$ 12,312	11,955	12,043	12,925	12,308	12,019	11,380	11,195	11,093	10,418	10,000
Average Annual Return, Percent	2.99%	0.48%	2.10%
C000015138 [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Class I Shares at NAV
Account Value	$ 12,568	$ 12,568	$ 12,568	12,168	12,243	13,114	12,462	12,145	11,475	11,265	11,139	10,449	10,000
Average Annual Return, Percent	3.29%	0.69%	2.31%
C000137679 [Member] | Without Sales Load [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Class C Shares at NAV (excluding maximum sales charge)
Account Value	$ 11,544	$ 11,544	$ 11,544	11,209	11,292	12,218	11,727	11,544	11,019	10,929	10,908	10,339	10,000
Average Annual Return, Percent	2.16%	(0.32%)	1.45%
C000015139 [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Class A Shares at maximum sales charge (Offering Price)
Account Value	$ 11,144	$ 11,144	$ 11,144	10,953	11,086	12,095	11,739	11,234	10,705	10,601	10,567	9,962	9,578
Average Annual Return, Percent	(2.56%)	(1.01%)	1.09%
C000015139 [Member] | Without Sales Load [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Class A Shares at NAV (excluding maximum sales charge)
Account Value	$ 11,635	$ 11,635	$ 11,635	11,435	11,574	12,627	12,256	11,728	11,176	11,068	11,033	10,400	10,000
Average Annual Return, Percent	1.75%	(0.16%)	1.53%
C000015141 [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Class I Shares at NAV
Account Value	$ 11,878	$ 11,878	$ 11,878	11,651	11,767	12,807	12,405	11,847	11,260	11,132	11,079	10,427	10,000
Average Annual Return, Percent	1.95%	0.05%	1.74%
C000137680 [Member] | Without Sales Load [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Class C Shares at NAV (excluding maximum sales charge)
Account Value	$ 10,908	$ 10,908	$ 10,908	10,721	10,851	11,928	11,672	11,268	10,815	10,801	10,857	10,317	10,000
Average Annual Return, Percent	0.93%	(0.95%)	0.87%
C000015134 [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Class A Shares at maximum sales charge (Offering Price)
Account Value	$ 11,562	$ 11,562	$ 11,562	11,306	11,227	11,912	11,486	11,198	10,650	10,553	10,461	9,949	9,704
Average Annual Return, Percent	(0.81%)	0.04%	1.46%
C000015134 [Member] | Without Sales Load [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Class A Shares at NAV (excluding maximum sales charge)
Account Value	$ 11,915	$ 11,915	$ 11,915	11,651	11,569	12,275	11,837	11,540	10,975	10,875	10,780	10,252	10,000
Average Annual Return, Percent	2.27%	0.64%	1.77%
C000015135 [Member] | Without Sales Load [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Class I Shares at NAV
Account Value	$ 12,160	$ 12,160	$ 12,160	11,868	11,762	12,449	11,982	11,660	11,056	10,936	10,822	10,271	10,000
Average Annual Return, Percent	2.47%	0.84%	1.98%
C000137678 [Member] | Without Sales Load [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Class C Shares at NAV (excluding maximum sales charge)
Account Value	$ 11,191	$ 11,191	$ 11,191	10,943	10,867	11,617	11,288	11,103	10,632	10,622	10,624	10,182	10,000
Average Annual Return, Percent	1.45%	(0.16%)	1.13%
C000015145 [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Class A Shares at maximum sales charge (Offering Price)
Account Value	$ 11,250	$ 11,250	$ 11,250	10,981	10,951	11,736	11,429	10,982	10,425	10,439	10,376	9,925	9,700
Average Annual Return, Percent	(0.64%)	(0.12%)	1.18%
C000015145 [Member] | Without Sales Load [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Class A Shares at NAV (excluding maximum sales charge)
Account Value	$ 11,598	$ 11,598	$ 11,598	11,320	11,290	12,099	11,782	11,321	10,748	10,762	10,697	10,232	10,000
Average Annual Return, Percent	2.45%	0.48%	1.49%
C000015146 [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Class I Shares at NAV
Account Value	$ 11,835	$ 11,835	$ 11,835	11,531	11,478	12,271	11,927	11,441	10,843	10,828	10,744	10,250	10,000
Average Annual Return, Percent	2.64%	0.68%	1.70%
C000137681 [Member] | Without Sales Load [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Class C Shares at NAV (excluding maximum sales charge)
Account Value	$ 10,873	$ 10,873	$ 10,873	10,613	10,584	11,440	11,229	10,874	10,406	10,507	10,529	10,150	10,000
Average Annual Return, Percent	1.52%	(0.32%)	0.84%
S And P Municipal Bond Minnesota Index [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	S&P Municipal Bond Minnesota Index
Account Value	$ 12,173	$ 12,173	$ 12,173	11,922	11,951	12,615	12,150	11,684	11,039	10,948	10,787	10,296	10,000
Average Annual Return, Percent	2.10%	0.82%	1.99%
S And P Municipal Bond Nebraska Index [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	S&P Municipal Bond Nebraska Index
Account Value	$ 12,384	$ 12,384	$ 12,384	12,093	12,091	12,908	12,518	11,900	11,253	11,123	10,973	10,358	10,000
Average Annual Return, Percent	2.41%	0.80%	2.16%
S And P Municipal Bond Index [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	S&P Municipal Bond Index
Account Value	$ 12,551	$ 12,551	$ 12,551	12,200	12,177	12,950	12,369	11,908	11,227	11,088	10,915	10,326	10,000
Average Annual Return, Percent	2.88%	1.06%	2.30%
S And P Municipal Bond Intermediate Index [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	S&P Municipal Bond Intermediate Index
Account Value	$ 12,303	$ 12,303	$ 12,303	$ 12,063	$ 11,938	$ 12,686	$ 12,232	$ 11,729	$ 11,023	$ 10,981	$ 10,796	$ 10,243	$ 10,000
Average Annual Return, Percent	1.99%	0.96%	2.09%
Lipper Minnesota Municipal Debt Funds Classification Average [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Lipper Minnesota Municipal Debt Funds Classification Average
Average Annual Return, Percent	2.45%	0.25%	1.57%
Lipper Other States Municipal Debt Funds Classification Average [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Lipper Other States Municipal Debt Funds Classification Average
Average Annual Return, Percent	2.59%	0.29%	1.56%
Lipper Other States Intermediate Municipal Debt Funds Classification Average [Member]
Account Value [Line Items]
Line Graph and Table Measure Name	Lipper Other States Intermediate Municipal Debt Funds Classification Average
Average Annual Return, Percent	1.84%	0.31%	1.29%

Shareholder Report, Holdings (D

Shareholder Report, Holdings (Details)	May 31, 2024
C000015136 [Member] | N R not rated [Member]
Holdings [Line Items]
Percent of Total Investments	15%	[1]
C000015136 [Member] | BB or Lower [Member]
Holdings [Line Items]
Percent of Total Investments	7.10%	[1]
C000015136 [Member] | Municipal Bonds [Member]
Holdings [Line Items]
Percent of Total Investments	100%
C000015138 [Member] | N R not rated [Member]
Holdings [Line Items]
Percent of Total Investments	15%	[2]
C000015138 [Member] | BB or Lower [Member]
Holdings [Line Items]
Percent of Total Investments	7.10%	[2]
C000015138 [Member] | Municipal Bonds [Member]
Holdings [Line Items]
Percent of Total Investments	100%
C000137679 [Member] | N R not rated [Member]
Holdings [Line Items]
Percent of Total Investments	15%	[3]
C000137679 [Member] | BB or Lower [Member]
Holdings [Line Items]
Percent of Total Investments	7.10%	[3]
C000137679 [Member] | Municipal Bonds [Member]
Holdings [Line Items]
Percent of Total Investments	100%
C000015139 [Member] | N R not rated [Member]
Holdings [Line Items]
Percent of Total Investments	7.60%	[4]
C000015139 [Member] | BB or Lower [Member]
Holdings [Line Items]
Percent of Total Investments	1.10%	[4]
C000015139 [Member] | Municipal Bonds [Member]
Holdings [Line Items]
Percent of Total Investments	100%
C000015141 [Member] | N R not rated [Member]
Holdings [Line Items]
Percent of Total Investments	7.60%	[5]
C000015141 [Member] | BB or Lower [Member]
Holdings [Line Items]
Percent of Total Investments	1.10%	[5]
C000015141 [Member] | Municipal Bonds [Member]
Holdings [Line Items]
Percent of Total Investments	100%
C000137680 [Member] | N R not rated [Member]
Holdings [Line Items]
Percent of Total Investments	7.60%	[6]
C000137680 [Member] | BB or Lower [Member]
Holdings [Line Items]
Percent of Total Investments	1.10%	[6]
C000137680 [Member] | Municipal Bonds [Member]
Holdings [Line Items]
Percent of Total Investments	100%
C000015134 [Member] | N R not rated [Member]
Holdings [Line Items]
Percent of Total Investments	17%	[7]
C000015134 [Member] | BB or Lower [Member]
Holdings [Line Items]
Percent of Total Investments	5.70%	[7]
C000015134 [Member] | Municipal Bonds [Member]
Holdings [Line Items]
Percent of Total Investments	100%
C000015135 [Member] | N R not rated [Member]
Holdings [Line Items]
Percent of Total Investments	17%	[8]
C000015135 [Member] | BB or Lower [Member]
Holdings [Line Items]
Percent of Total Investments	5.70%	[8]
C000015135 [Member] | Municipal Bonds [Member]
Holdings [Line Items]
Percent of Total Investments	100%
C000137678 [Member] | N R not rated [Member]
Holdings [Line Items]
Percent of Total Investments	17%	[9]
C000137678 [Member] | BB or Lower [Member]
Holdings [Line Items]
Percent of Total Investments	5.70%	[9]
C000137678 [Member] | Municipal Bonds [Member]
Holdings [Line Items]
Percent of Total Investments	100%
C000015145 [Member] | N R not rated [Member]
Holdings [Line Items]
Percent of Total Investments	10%	[10]
C000015145 [Member] | BB or Lower [Member]
Holdings [Line Items]
Percent of Total Investments	2.40%	[10]
C000015145 [Member] | Municipal Bonds [Member]
Holdings [Line Items]
Percent of Total Investments	100%
C000015146 [Member] | N R not rated [Member]
Holdings [Line Items]
Percent of Total Investments	10%	[11]
C000015146 [Member] | BB or Lower [Member]
Holdings [Line Items]
Percent of Total Investments	2.40%	[11]
C000015146 [Member] | Municipal Bonds [Member]
Holdings [Line Items]
Percent of Total Investments	100%
C000137681 [Member] | N R not rated [Member]
Holdings [Line Items]
Percent of Total Investments	10%	[12]
C000137681 [Member] | BB or Lower [Member]
Holdings [Line Items]
Percent of Total Investments	2.40%	[12]
C000137681 [Member] | Municipal Bonds [Member]
Holdings [Line Items]
Percent of Total Investments	100%
[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.[2]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.[3]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.[4]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.[5]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.[6]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.[7]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.[8]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.[9]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.[10]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.[11]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.[12]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.

Uncategorized Items - d810576dn

Label	Element	Value
C000015138 [Member] | Standard & Poor's, AAA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	14.40%	[1]
C000015138 [Member] | Standard & Poor's, BBB Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	4.80%	[1]
C000015138 [Member] | Standard & Poor's, AA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	32.60%	[1]
C000015138 [Member] | Standard & Poor's, A Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	26.10%	[1]
C000015145 [Member] | Standard & Poor's, AAA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	3.50%	[2]
C000015145 [Member] | Standard & Poor's, BBB Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	5.40%	[2]
C000015145 [Member] | Standard & Poor's, AA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	66.90%	[2]
C000015145 [Member] | Standard & Poor's, A Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	11.80%	[2]
C000015139 [Member] | Standard & Poor's, AAA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	2%	[3]
C000015139 [Member] | Standard & Poor's, BBB Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	1.60%	[3]
C000015139 [Member] | Standard & Poor's, AA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	61.90%	[3]
C000015139 [Member] | Standard & Poor's, A Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	25.80%	[3]
C000137681 [Member] | Standard & Poor's, AAA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	3.50%	[4]
C000137681 [Member] | Standard & Poor's, BBB Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	5.40%	[4]
C000137681 [Member] | Standard & Poor's, AA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	66.90%	[4]
C000137681 [Member] | Standard & Poor's, A Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	11.80%	[4]
C000015136 [Member] | Standard & Poor's, AAA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	14.40%	[5]
C000015136 [Member] | Standard & Poor's, BBB Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	4.80%	[5]
C000015136 [Member] | Standard & Poor's, AA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	32.60%	[5]
C000015136 [Member] | Standard & Poor's, A Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	26.10%	[5]
C000015146 [Member] | Standard & Poor's, AAA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	3.50%	[6]
C000015146 [Member] | Standard & Poor's, BBB Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	5.40%	[6]
C000015146 [Member] | Standard & Poor's, AA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	66.90%	[6]
C000015146 [Member] | Standard & Poor's, A Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	11.80%	[6]
C000137678 [Member] | Standard & Poor's, AAA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	16.50%	[7]
C000137678 [Member] | Standard & Poor's, BBB Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	9%	[7]
C000137678 [Member] | Standard & Poor's, AA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	32.40%	[7]
C000137678 [Member] | Standard & Poor's, A Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	19.40%	[7]
C000137680 [Member] | Standard & Poor's, AAA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	2%	[8]
C000137680 [Member] | Standard & Poor's, BBB Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	1.60%	[8]
C000137680 [Member] | Standard & Poor's, AA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	61.90%	[8]
C000137680 [Member] | Standard & Poor's, A Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	25.80%	[8]
C000137679 [Member] | Standard & Poor's, AAA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	14.40%	[9]
C000137679 [Member] | Standard & Poor's, BBB Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	4.80%	[9]
C000137679 [Member] | Standard & Poor's, AA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	32.60%	[9]
C000137679 [Member] | Standard & Poor's, A Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	26.10%	[9]
C000015135 [Member] | Standard & Poor's, AAA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	16.50%	[10]
C000015135 [Member] | Standard & Poor's, BBB Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	9%	[10]
C000015135 [Member] | Standard & Poor's, AA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	32.40%	[10]
C000015135 [Member] | Standard & Poor's, A Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	19.40%	[10]
C000015141 [Member] | Standard & Poor's, AAA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	2%	[11]
C000015141 [Member] | Standard & Poor's, BBB Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	1.60%	[11]
C000015141 [Member] | Standard & Poor's, AA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	61.90%	[11]
C000015141 [Member] | Standard & Poor's, A Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	25.80%	[11]
C000015134 [Member] | Standard & Poor's, AAA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	16.50%	[12]
C000015134 [Member] | Standard & Poor's, BBB Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	9%	[12]
C000015134 [Member] | Standard & Poor's, AA Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	32.40%	[12]
C000015134 [Member] | Standard & Poor's, A Rating [Member]
Percent of Total Investments	oef_PctOfTotalInv	19.40%	[12]
[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.[2]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.[3]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.[4]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.[5]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.[6]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.[7]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.[8]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.[9]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.[10]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.[11]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.[12]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.