| Form N-CSR Cover | 12 Months Ended |
| May 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | BLACKROCK MULTI STATE MUNICIPAL SERIES TRUST |
| Entity Central Index Key | 0000774013 |
| Document Period End Date | May 31, 2024 |
| Shareholder Report | 12 Months Ended |
| May 31, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | BLACKROCK MULTI STATE MUNICIPAL SERIES TRUST |
| Entity Central Index Key | 0000774013 |
| Document Period End Date | May 31, 2024 |
| C000038303 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | BlackRock Pennsylvania Municipal Bond Fund |
| Class Name | Investor A Shares |
| Trading Symbol | MEPYX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about BlackRock Pennsylvania Municipal Bond Fund (the “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 about the Fund at blackrock.com/fundreports . |
| Additional Information Phone Number | (800) 441‑7762 |
| Additional Information Website | blackrock.com/fundreports |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class name Costs of a $10,000 Costs paid as a percentage of a Investor A Shares $ 0.78 % |
| Expenses Paid, Amount | $ 79 |
| Expense Ratio, Percent | 0.78% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year? The municipal bond market gained ground during the reporting period, with the benefit of income augmented by a modest gain in prices. Declining inflation fueled expectations that the U.S. Federal Reserve was set to begin cutting interest rates in 2024, benefiting the broader fixed-income market. Municipal bonds were further helped by positive economic growth, strong issuer fundamentals, and favorable supply-and-demand trends. What contributed to performance? Holdings in the tax-backed sector outpaced the Pennsylvania Customized Reference Benchmark (the "benchmark"). The Fund’s out-of-benchmark allocation to Puerto Rico general obligation and sales tax bonds, which attracted investor demand with their liquidity and higher yields, enhanced returns. Positions in high-yield and non-rated securities, which exceeded the return of the investment-grade benchmark, were also beneficial. What detracted from performance? A strategic underweight in Pennsylvania Turnpike bonds, which have an outsized allocation in the benchmark, hurt results. Holdings in the housing sector detracted, as well. The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results. |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Line Graph [Table Text Block] | Fund performance Cumulative performance: June 1, 2014 through May 31, 2024 Initial investment of $10,000 See “Average annual total returns” for additional information on fund performance. |
| Average Annual Return [Table Text Block] | Average annual total returns 1 Year 5 Years 10 Years Investor A Shares 3.17 ) % 0.08 ) % 1.86 % Investor A Shares (with sales charge) (1.21 ) % (0.79 ) % 1.42 % Bloomberg Municipal Bond Index 2.67 ) % 0.93 ) % 2.25 % Pennsylvania Customized Reference Benchmark 3.23 ) % 1.01 ) % N/A |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| Updated Performance Information Location [Text Block] | Visit blackrock.com |
| Net Assets | $ 344,637,974 |
| Holdings Count | Holding | 167 |
| Advisory Fees Paid, Amount | $ 1,432,616 |
| Investment Company Portfolio Turnover | 18% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets $ % Number of Portfolio Holdings $ % Net Investment Advisory Fees $ % Portfolio Turnover Rate $ % |
| Holdings [Text Block] | What did the Fund invest in? (as of May 31, 2024) Sector allocation Sector (a)(b) Percent of Health 21.6 % Transportation 18.0 % County/City/Special District/School District 17.1 % Education 16.1 % Corporate 7.8 % Housing 6.9 % Utilities 6.3 % State 3.6 % Tobacco 2.6 % Credit quality allocation Credit Rating (a)(c) Percent of AA/Aa 42.9 % A 31.1 % BBB/Baa 8.7 % BB/Ba 3.3 % B 0.7 % N/R (d) 13.3 % (a) (b) (c) (d) Excludes short-term securities. (a) (b) (c) (d) For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes. (a) (b) (c) (d) For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. (a) (b) (c) (d) The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents less than 1.0% of total investments. |
| Credit Quality Explanation [Text Block] | The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents less than 1.0% of total investments |
| Credit Ratings Selection [Text Block] | For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. |
| C000038305 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | BlackRock Pennsylvania Municipal Bond Fund |
| Class Name | Investor C Shares |
| Trading Symbol | MFPYX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about BlackRock Pennsylvania Municipal Bond Fund (the “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 about the Fund at blackrock.com/fundreports . |
| Additional Information Phone Number | (800) 441‑7762 |
| Additional Information Website | blackrock.com/fundreports |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class name Costs of a $10,000 Costs paid as a percentage of a Investor C Shares $ 1.54 % |
| Expenses Paid, Amount | $ 156 |
| Expense Ratio, Percent | 1.54% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year? The municipal bond market gained ground during the reporting period, with the benefit of income augmented by a modest gain in prices. Declining inflation fueled expectations that the U.S. Federal Reserve was set to begin cutting interest rates in 2024, benefiting the broader fixed-income market. Municipal bonds were further helped by positive economic growth, strong issuer fundamentals, and favorable supply-and-demand trends. What contributed to performance? Holdings in the tax-backed sector outpaced the Pennsylvania Customized Reference Benchmark (the "benchmark"). The Fund’s out-of-benchmark allocation to Puerto Rico general obligation and sales tax bonds, which attracted investor demand with their liquidity and higher yields, enhanced returns. Positions in high-yield and non-rated securities, which exceeded the return of the investment-grade benchmark, were also beneficial. What detracted from performance? A strategic underweight in Pennsylvania Turnpike bonds, which have an outsized allocation in the benchmark, hurt results. Holdings in the housing sector detracted, as well. The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results. |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Line Graph [Table Text Block] | Fund performance Cumulative performance: June 1, 2014 through May 31, 2024 Initial investment of $10,000 See “Average annual total returns” for additional information on fund performance. |
| Average Annual Return [Table Text Block] | Average annual total returns 1 Year 5 Years 10 Years Investor C Shares 2.29 % (0.70 ) % 1.26 % Investor C Shares (with sales charge) 1.29 % (0.70 ) % 1.26 % Bloomberg Municipal Bond Index 2.67 % 0.93 ) % 2.25 % Pennsylvania Customized Reference Benchmark 3.23 % 1.01 ) % N/A |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| Updated Performance Information Location [Text Block] | Visit blackrock.com |
| Net Assets | $ 344,637,974 |
| Holdings Count | Holding | 167 |
| Advisory Fees Paid, Amount | $ 1,432,616 |
| Investment Company Portfolio Turnover | 18% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets $ % Number of Portfolio Holdings $ % Net Investment Advisory Fees $ % Portfolio Turnover Rate $ % |
| Holdings [Text Block] | What did the Fund invest in? (as of May 31, 2024) Sector allocation Sector (a)(b) Percent of Health 21.6 % Transportation 18.0 % County/City/Special District/School District 17.1 % Education 16.1 % Corporate 7.8 % Housing 6.9 % Utilities 6.3 % State 3.6 % Tobacco 2.6 % Credit quality allocation Credit Rating (a)(c) Percent of AA/Aa 42.9 % A 31.1 % BBB/Baa 8.7 % BB/Ba 3.3 % B 0.7 % N/R (d) 13.3 % (a) (b) (c) (d) Excludes short-term securities. (a) (b) (c) (d) For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes. (a) (b) (c) (d) For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. (a) (b) (c) (d) The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents less than 1.0% of total investments. |
| Credit Quality Explanation [Text Block] | The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents less than 1.0% of total investments. |
| Credit Ratings Selection [Text Block] | For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. |
| C000011320 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | BlackRock Pennsylvania Municipal Bond Fund |
| Class Name | Institutional Shares |
| Trading Symbol | MAPYX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about BlackRock Pennsylvania Municipal Bond Fund (the “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 about the Fund at blackrock.com/fundreports . |
| Additional Information Phone Number | (800) 441‑7762 |
| Additional Information Website | blackrock.com/fundreports |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class name Costs of a $10,000 Costs paid as a percentage of a Institutional Shares $ 0.54 % |
| Expenses Paid, Amount | $ 55 |
| Expense Ratio, Percent | 0.54% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year? The municipal bond market gained ground during the reporting period, with the benefit of income augmented by a modest gain in prices. Declining inflation fueled expectations that the U.S. Federal Reserve was set to begin cutting interest rates in 2024, benefiting the broader fixed-income market. Municipal bonds were further helped by positive economic growth, strong issuer fundamentals, and favorable supply-and-demand trends. What contributed to performance? Holdings in the tax-backed sector outpaced the Pennsylvania Customized Reference Benchmark (the "benchmark"). The Fund’s out-of-benchmark allocation to Puerto Rico general obligation and sales tax bonds, which attracted investor demand with their liquidity and higher yields, enhanced returns. Positions in high-yield and non-rated securities, which exceeded the return of the investment-grade benchmark, were also beneficial. What detracted from performance? A strategic underweight in Pennsylvania Turnpike bonds, which have an outsized allocation in the benchmark, hurt results. Holdings in the housing sector detracted, as well. The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results. |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Line Graph [Table Text Block] | Fund performance Cumulative performance: June 1, 2014 through May 31, 2024 Initial investment of $10,000 See “Average annual total returns” for additional information on fund performance. |
| Average Annual Return [Table Text Block] | Average annual total returns 1 Year 5 Years 10 Years Institutional Shares 3.32 % 0.30 % 2.10 % Bloomberg Municipal Bond Index 2.67 % 0.93 % 2.25 % Pennsylvania Customized Reference Benchmark 3.23 % 1.01 % N/A |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| Updated Performance Information Location [Text Block] | Visit blackrock.com |
| Net Assets | $ 344,637,974 |
| Holdings Count | Holding | 167 |
| Advisory Fees Paid, Amount | $ 1,432,616 |
| Investment Company Portfolio Turnover | 18% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets $ % Number of Portfolio Holdings $ % Net Investment Advisory Fees $ % Portfolio Turnover Rate $ % |
| Holdings [Text Block] | What did the Fund invest in? (as of May 31, 2024) Sector allocation Sector (a)(b) Percent of Health 21.6 % Transportation 18.0 % County/City/Special District/School District 17.1 % Education 16.1 % Corporate 7.8 % Housing 6.9 % Utilities 6.3 % State 3.6 % Tobacco 2.6 % Credit quality allocation Credit Rating (a)(c) Percent of AA/Aa 42.9 % A 31.1 % BBB/Baa 8.7 % BB/Ba 3.3 % B 0.7 % N/R (d) 13.3 % (a) (b) (c) (d) Excludes short-term securities. (a) (b) (c) (d) For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes. (a) (b) (c) (d) For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. (a) (b) (c) (d) The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents less than 1.0% of total investments. |
| Credit Quality Explanation [Text Block] | The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents less than 1.0% of total investments. |
| Credit Ratings Selection [Text Block] | For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. |
| C000038247 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | BlackRock New Jersey Municipal Bond Fund |
| Class Name | Investor C Shares |
| Trading Symbol | MFNJX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about BlackRock New Jersey Municipal Bond Fund (the “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 about the Fund at blackrock.com/fundreports . |
| Additional Information Phone Number | (800) 441‑7762 |
| Additional Information Website | blackrock.com/fundreports |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class name Costs of a $10,000 Costs paid as a percentage of a Investor C Shares $ 1.52 % |
| Expenses Paid, Amount | $ 154 |
| Expense Ratio, Percent | 1.52% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year? The municipal bond market gained ground during the reporting period, with the benefit of income augmented by a modest gain in prices. Declining inflation fueled expectations that the U.S. Federal Reserve was set to begin cutting interest rates in 2024, benefiting the broader fixed-income market. New Jersey state-specific issuance has trailed historical norms for two consecutive years as increased revenues, prudent expenditure management, and federal stimulus has led to a reduced need to finance deficits. The lower level of supply contributed to a tightening of credit spreads, benefiting market performance. What contributed to performance? The Fund’s holdings in the tax-backed sector outpaced the New Jersey Customized Reference Benchmark (the "benchmark"). Out-of-benchmark positions in Puerto Rico, general obligation, and sales tax bonds, which attracted investor demand with their liquidity and higher yields, enhanced returns. An allocation to high-yield and non-rated securities, which exceeded the return of the investment-grade benchmark, also helped results. At the sector level, overweights in corporate-backed, education, and healthcare issues contributed. An overweight in bonds with maturities from 15 years to 30 years aided relative performance, as well. An overweight in low-coupon bonds with positive convexity, together with an underweight in standard 5% coupon bonds, was a further contributor. (A bond with positive convexity outperforms when rates fall.) The Fund’s cash position had no material impact on performance. What detracted from performance? A strategic underweight in New Jersey Transportation bonds, which had an outsized allocation in the benchmark, hurt results. An underweight in the tobacco sector also detracted, as did underweights in bonds rated B and BB. The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results. |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Line Graph [Table Text Block] | Fund performance Cumulative performance: June 1, 2014 through May 31, 2024 Initial investment of $10,000 See “Average annual total returns” for additional information on fund performance. |
| Average Annual Return [Table Text Block] | Average annual total returns 1 Year 5 Years 10 Years Investor C Shares 2.43 % 0.03 % 1.70 % Investor C Shares (with sales charge) 1.44 % 0.03 % 1.70 % Bloomberg Municipal Bond Index 2.67 % 0.93 % 2.25 % New Jersey Customized Reference Benchmark 3.18 % 1.70 % N/A |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| Updated Performance Information Location [Text Block] | Visit blackrock.com |
| Net Assets | $ 293,343,237 |
| Holdings Count | Holding | 181 |
| Advisory Fees Paid, Amount | $ 1,073,870 |
| Investment Company Portfolio Turnover | 10% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets $ % Number of Portfolio Holdings $ % Net Investment Advisory Fees $ % Portfolio Turnover Rate $ % |
| Holdings [Text Block] | What did the Fund invest in? (as of May 31, 2024) Sector allocation Sector (a)(b) Percent of Transportation 30.3 % Education 15.9 % State 15.0 % Health 12.0 % County/City/Special District/School District 12.0 % Corporate 7.1 % Housing 3.5 % Utilities 2.8 % Tobacco 1.4 % Credit quality allocation Credit Rating (a)(c) Percent of AAA/Aaa 0.8 % AA/Aa 42.5 % A 44.4 % BBB/Baa 5.6 % BB/Ba 0.7 % N/R (d) 6.0 % (a) (b) (c) (d) Excludes short-term securities. (a) (b) (c) (d) For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes. (a) (b) (c) (d) For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. (a) (b) (c) (d) The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents 1.6% of total investments. |
| Credit Quality Explanation [Text Block] | The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents 1.6% of total investments. |
| Credit Ratings Selection [Text Block] | For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. |
| C000038245 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | BlackRock New Jersey Municipal Bond Fund |
| Class Name | Investor A Shares |
| Trading Symbol | MENJX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about BlackRock New Jersey Municipal Bond Fund (the “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 about the Fund at blackrock.com/fundreports . |
| Additional Information Phone Number | (800) 441‑7762 |
| Additional Information Website | blackrock.com/fundreports |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class name Costs of a $10,000 Costs paid as a percentage of a Investor A Shares $ 0.77 % |
| Expenses Paid, Amount | $ 78 |
| Expense Ratio, Percent | 0.77% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year? The municipal bond market gained ground during the reporting period, with the benefit of income augmented by a modest gain in prices. Declining inflation fueled expectations that the U.S. Federal Reserve was set to begin cutting interest rates in 2024, benefiting the broader fixed-income market. New Jersey state-specific issuance has trailed historical norms for two consecutive years as increased revenues, prudent expenditure management, and federal stimulus has led to a reduced need to finance deficits. The lower level of supply contributed to a tightening of credit spreads, benefiting market performance. What contributed to performance? The Fund’s holdings in the tax-backed sector outpaced the New Jersey Customized Reference Benchmark (the "benchmark"). Out-of-benchmark positions in Puerto Rico, general obligation, and sales tax bonds, which attracted investor demand with their liquidity and higher yields, enhanced returns. An allocation to high-yield and non-rated securities, which exceeded the return of the investment-grade benchmark, also helped results. At the sector level, overweights in corporate-backed, education, and healthcare issues contributed. An overweight in bonds with maturities from 15 years to 30 years aided relative performance, as well. An overweight in low-coupon bonds with positive convexity, together with an underweight in standard 5% coupon bonds, was a further contributor. (A bond with positive convexity outperforms when rates fall.) The Fund’s cash position had no material impact on performance. What detracted from performance? A strategic underweight in New Jersey Transportation bonds, which had an outsized allocation in the benchmark, hurt results. An underweight in the tobacco sector also detracted, as did underweights in bonds rated B and BB. The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results. |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Line Graph [Table Text Block] | Fund performance Cumulative performance: June 1, 2014 through May 31, 2024 Initial investment of $10,000 See “Average annual total returns” for additional information on fund performance. |
| Average Annual Return [Table Text Block] | Average annual total returns 1 Year 5 Years 10 Years Investor A Shares 3.21 ) % 0.79 ) % 2.31 % Investor A Shares (with sales charge) (1.18 ) % (0.08 ) % 1.86 % Bloomberg Municipal Bond Index 2.67 ) % 0.93 ) % 2.25 % New Jersey Customized Reference Benchmark 3.18 ) % 1.70 ) % N/A |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| Updated Performance Information Location [Text Block] | Visit blackrock.com |
| Net Assets | $ 293,343,237 |
| Holdings Count | Holding | 181 |
| Advisory Fees Paid, Amount | $ 1,073,870 |
| Investment Company Portfolio Turnover | 10% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets $ % Number of Portfolio Holdings $ % Net Investment Advisory Fees $ % Portfolio Turnover Rate $ % |
| Holdings [Text Block] | What did the Fund invest in? (as of May 31, 2024) Sector allocation Sector (a)(b) Percent of Transportation 30.3 % Education 15.9 % State 15.0 % Health 12.0 % County/City/Special District/School District 12.0 % Corporate 7.1 % Housing 3.5 % Utilities 2.8 % Tobacco 1.4 % Credit quality allocation Credit Rating (a)(c) Percent of AAA/Aaa 0.8 % AA/Aa 42.5 % A 44.4 % BBB/Baa 5.6 % BB/Ba 0.7 % N/R (d) 6.0 % (a) (b) (c) (d) Excludes short-term securities. (a) (b) (c) (d) For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes. (a) (b) (c) (d) For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. (a) (b) (c) (d) The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents 1.6% of total investments. |
| Credit Quality Explanation [Text Block] | The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents 1.6% of total investments. |
| Credit Ratings Selection [Text Block] | For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. |
| C000038248 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | BlackRock New Jersey Municipal Bond Fund |
| Class Name | Service Shares |
| Trading Symbol | MSNJX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about BlackRock New Jersey Municipal Bond Fund (the “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 about the Fund at blackrock.com/fundreports . |
| Additional Information Phone Number | (800) 441‑7762 |
| Additional Information Website | blackrock.com/fundreports |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class name Costs of a $10,000 Costs paid as a percentage of a Service Shares $ 0.77 % |
| Expenses Paid, Amount | $ 78 |
| Expense Ratio, Percent | 0.77% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year? The municipal bond market gained ground during the reporting period, with the benefit of income augmented by a modest gain in prices. Declining inflation fueled expectations that the U.S. Federal Reserve was set to begin cutting interest rates in 2024, benefiting the broader fixed-income market. New Jersey state-specific issuance has trailed historical norms for two consecutive years as increased revenues, prudent expenditure management, and federal stimulus has led to a reduced need to finance deficits. The lower level of supply contributed to a tightening of credit spreads, benefiting market performance. What contributed to performance? The Fund’s holdings in the tax-backed sector outpaced the New Jersey Customized Reference Benchmark (the "benchmark"). Out-of-benchmark positions in Puerto Rico, general obligation, and sales tax bonds, which attracted investor demand with their liquidity and higher yields, enhanced returns. An allocation to high-yield and non-rated securities, which exceeded the return of the investment-grade benchmark, also helped results. At the sector level, overweights in corporate-backed, education, and healthcare issues contributed. An overweight in bonds with maturities from 15 years to 30 years aided relative performance, as well. An overweight in low-coupon bonds with positive convexity, together with an underweight in standard 5% coupon bonds, was a further contributor. (A bond with positive convexity outperforms when rates fall.) The Fund’s cash position had no material impact on performance. What detracted from performance? A strategic underweight in New Jersey Transportation bonds, which had an outsized allocation in the benchmark, hurt results. An underweight in the tobacco sector also detracted, as did underweights in bonds rated B and BB. The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results. |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Line Graph [Table Text Block] | Fund performance Cumulative performance: June 1, 2014 through May 31, 2024 Initial investment of $10,000 See “Average annual total returns” for additional information on fund performance. |
| Average Annual Return [Table Text Block] | Average annual total returns 1 Year 5 Years 10 Years Service Shares 3.20 % 0.78 % 2.31 % Bloomberg Municipal Bond Index 2.67 % 0.93 % 2.25 % New Jersey Customized Reference Benchmark 3.18 % 1.70 % N/A |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| Updated Performance Information Location [Text Block] | Visit blackrock.com |
| Net Assets | $ 293,343,237 |
| Holdings Count | Holding | 181 |
| Advisory Fees Paid, Amount | $ 1,073,870 |
| Investment Company Portfolio Turnover | 10% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets $ % Number of Portfolio Holdings $ % Net Investment Advisory Fees $ % Portfolio Turnover Rate $ % |
| Holdings [Text Block] | What did the Fund invest in? (as of May 31, 2024) Sector allocation Sector (a)(b) Percent of Transportation 30.3 % Education 15.9 % State 15.0 % Health 12.0 % County/City/Special District/School District 12.0 % Corporate 7.1 % Housing 3.5 % Utilities 2.8 % Tobacco 1.4 % Credit quality allocation Credit Rating (a)(c) Percent of AAA/Aaa 0.8 % AA/Aa 42.5 % A 44.4 % BBB/Baa 5.6 % BB/Ba 0.7 % N/R (d) 6.0 % (a) (b) (c) (d) Excludes short-term securities. (a) (b) (c) (d) For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes. (a) (b) (c) (d) For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. (a) (b) (c) (d) The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents 1.6% of total investments. |
| Credit Quality Explanation [Text Block] | The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents 1.6% of total investments. |
| Credit Ratings Selection [Text Block] | For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. |
| C000199769 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | BlackRock New Jersey Municipal Bond Fund |
| Class Name | Class K Shares |
| Trading Symbol | MKNJX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about BlackRock New Jersey Municipal Bond Fund (the “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 about the Fund at blackrock.com/fundreports . |
| Additional Information Phone Number | (800) 441‑7762 |
| Additional Information Website | blackrock.com/fundreports |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class name Costs of a $10,000 Costs paid as a percentage of a Class K Shares $ 0.47 % |
| Expenses Paid, Amount | $ 48 |
| Expense Ratio, Percent | 0.47% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year? The municipal bond market gained ground during the reporting period, with the benefit of income augmented by a modest gain in prices. Declining inflation fueled expectations that the U.S. Federal Reserve was set to begin cutting interest rates in 2024, benefiting the broader fixed-income market. New Jersey state-specific issuance has trailed historical norms for two consecutive years as increased revenues, prudent expenditure management, and federal stimulus has led to a reduced need to finance deficits. The lower level of supply contributed to a tightening of credit spreads, benefiting market performance. What contributed to performance? The Fund’s holdings in the tax-backed sector outpaced the New Jersey Customized Reference Benchmark (the "benchmark"). Out-of-benchmark positions in Puerto Rico, general obligation, and sales tax bonds, which attracted investor demand with their liquidity and higher yields, enhanced returns. An allocation to high-yield and non-rated securities, which exceeded the return of the investment-grade benchmark, also helped results. At the sector level, overweights in corporate-backed, education, and healthcare issues contributed. An overweight in bonds with maturities from 15 years to 30 years aided relative performance, as well. An overweight in low-coupon bonds with positive convexity, together with an underweight in standard 5% coupon bonds, was a further contributor. (A bond with positive convexity outperforms when rates fall.) The Fund’s cash position had no material impact on performance. What detracted from performance? A strategic underweight in New Jersey Transportation bonds, which had an outsized allocation in the benchmark, hurt results. An underweight in the tobacco sector also detracted, as did underweights in bonds rated B and BB. The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results. |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Line Graph [Table Text Block] | Fund performance Cumulative performance: June 1, 2014 through May 31, 2024 Initial investment of $10,000 See “Average annual total returns” for additional information on fund performance. |
| Average Annual Return [Table Text Block] | Average annual total returns 1 Year 5 Years 10 Years Class K Shares 3.51 % 1.08 % 2.56 % Bloomberg Municipal Bond Index 2.67 % 0.93 % 2.25 % New Jersey Customized Reference Benchmark 3.18 % 1.70 % N/A |
| Performance Inception Date | Jan. 25, 2018 |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| Updated Performance Information Location [Text Block] | Visit blackrock.com |
| Net Assets | $ 293,343,237 |
| Holdings Count | Holding | 181 |
| Advisory Fees Paid, Amount | $ 1,073,870 |
| Investment Company Portfolio Turnover | 10% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets $ % Number of Portfolio Holdings $ % Net Investment Advisory Fees $ % Portfolio Turnover Rate $ % |
| Holdings [Text Block] | What did the Fund invest in? (as of May 31, 2024) Sector allocation Sector (a)(b) Percent of Transportation 30.3 % Education 15.9 % State 15.0 % Health 12.0 % County/City/Special District/School District 12.0 % Corporate 7.1 % Housing 3.5 % Utilities 2.8 % Tobacco 1.4 % Credit quality allocation Credit Rating (a)(c) Percent of AAA/Aaa 0.8 % AA/Aa 42.5 % A 44.4 % BBB/Baa 5.6 % BB/Ba 0.7 % N/R (d) 6.0 % (a) (b) (c) (d) Excludes short-term securities. (a) (b) (c) (d) For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes. (a) (b) (c) (d) For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. (a) (b) (c) (d) The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents 1.6% of total investments. |
| Credit Quality Explanation [Text Block] | The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents 1.6% of total investments. |
| Credit Ratings Selection [Text Block] | For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. |
| C000199770 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | BlackRock Pennsylvania Municipal Bond Fund |
| Class Name | Class K Shares |
| Trading Symbol | MKPYX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about BlackRock Pennsylvania Municipal Bond Fund (the “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 about the Fund at blackrock.com/fundreports . |
| Additional Information Phone Number | (800) 441‑7762 |
| Additional Information Website | blackrock.com/fundreports |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class name Costs of a $10,000 Costs paid as a percentage of a Class K Shares $ 0.49 % |
| Expenses Paid, Amount | $ 50 |
| Expense Ratio, Percent | 0.49% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year? The municipal bond market gained ground during the reporting period, with the benefit of income augmented by a modest gain in prices. Declining inflation fueled expectations that the U.S. Federal Reserve was set to begin cutting interest rates in 2024, benefiting the broader fixed-income market. Municipal bonds were further helped by positive economic growth, strong issuer fundamentals, and favorable supply-and-demand trends. What contributed to performance? Holdings in the tax-backed sector outpaced the Pennsylvania Customized Reference Benchmark (the "benchmark"). The Fund’s out-of-benchmark allocation to Puerto Rico general obligation and sales tax bonds, which attracted investor demand with their liquidity and higher yields, enhanced returns. Positions in high-yield and non-rated securities, which exceeded the return of the investment-grade benchmark, were also beneficial. What detracted from performance? A strategic underweight in Pennsylvania Turnpike bonds, which have an outsized allocation in the benchmark, hurt results. Holdings in the housing sector detracted, as well. The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results. |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Line Graph [Table Text Block] | Fund performance Cumulative performance: June 1, 2014 through May 31, 2024 Initial investment of $10,000 See “Average annual total returns” for additional information on fund performance. |
| Average Annual Return [Table Text Block] | Average annual total returns 1 Year 5 Years 10 Years Class K Shares 3.37 % 0.37 % 2.13 % Bloomberg Municipal Bond Index 2.67 % 0.93 % 2.25 % Pennsylvania Customized Reference Benchmark 3.23 % 1.01 % N/A |
| Performance Inception Date | Jan. 25, 2018 |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| Updated Performance Information Location [Text Block] | Visit blackrock.com |
| Net Assets | $ 344,637,974 |
| Holdings Count | Holding | 167 |
| Advisory Fees Paid, Amount | $ 1,432,616 |
| Investment Company Portfolio Turnover | 18% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets $ % Number of Portfolio Holdings $ % Net Investment Advisory Fees $ % Portfolio Turnover Rate $ % |
| Holdings [Text Block] | What did the Fund invest in? (as of May 31, 2024) Sector allocation Sector (a)(b) Percent of Health 21.6 % Transportation 18.0 % County/City/Special District/School District 17.1 % Education 16.1 % Corporate 7.8 % Housing 6.9 % Utilities 6.3 % State 3.6 % Tobacco 2.6 % Credit quality allocation Credit Rating (a)(c) Percent of AA/Aa 42.9 % A 31.1 % BBB/Baa 8.7 % BB/Ba 3.3 % B 0.7 % N/R (d) 13.3 % (a) (b) (c) (d) Excludes short-term securities. (a) (b) (c) (d) For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes. (a) (b) (c) (d) For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. (a) (b) (c) (d) The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents less than 1.0% of total investments. |
| Credit Quality Explanation [Text Block] | The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents less than 1.0% of total investments. |
| Credit Ratings Selection [Text Block] | For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. |
| C000011312 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | BlackRock New Jersey Municipal Bond Fund |
| Class Name | Institutional Shares |
| Trading Symbol | MANJX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about BlackRock New Jersey Municipal Bond Fund (the “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 about the Fund at blackrock.com/fundreports . |
| Additional Information Phone Number | (800) 441‑7762 |
| Additional Information Website | blackrock.com/fundreports |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class name Costs of a $10,000 Costs paid as a percentage of a Institutional Shares $ 0.52 % |
| Expenses Paid, Amount | $ 53 |
| Expense Ratio, Percent | 0.52% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year? The municipal bond market gained ground during the reporting period, with the benefit of income augmented by a modest gain in prices. Declining inflation fueled expectations that the U.S. Federal Reserve was set to begin cutting interest rates in 2024, benefiting the broader fixed-income market. New Jersey state-specific issuance has trailed historical norms for two consecutive years as increased revenues, prudent expenditure management, and federal stimulus has led to a reduced need to finance deficits. The lower level of supply contributed to a tightening of credit spreads, benefiting market performance. What contributed to performance? The Fund’s holdings in the tax-backed sector outpaced the New Jersey Customized Reference Benchmark (the "benchmark"). Out-of-benchmark positions in Puerto Rico, general obligation, and sales tax bonds, which attracted investor demand with their liquidity and higher yields, enhanced returns. An allocation to high-yield and non-rated securities, which exceeded the return of the investment-grade benchmark, also helped results. At the sector level, overweights in corporate-backed, education, and healthcare issues contributed. An overweight in bonds with maturities from 15 years to 30 years aided relative performance, as well. An overweight in low-coupon bonds with positive convexity, together with an underweight in standard 5% coupon bonds, was a further contributor. (A bond with positive convexity outperforms when rates fall.) The Fund’s cash position had no material impact on performance. What detracted from performance? A strategic underweight in New Jersey Transportation bonds, which had an outsized allocation in the benchmark, hurt results. An underweight in the tobacco sector also detracted, as did underweights in bonds rated B and BB. The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results. |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Line Graph [Table Text Block] | Fund performance Cumulative performance: June 1, 2014 through May 31, 2024 Initial investment of $10,000 See “Average annual total returns” for additional information on fund performance. |
| Average Annual Return [Table Text Block] | Average annual total returns 1 Year 5 Years 10 Years Institutional Shares 3.46 % 1.03 % 2.53 % Bloomberg Municipal Bond Index 2.67 % 0.93 % 2.25 % New Jersey Customized Reference Benchmark 3.18 % 1.70 % N/A |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| Updated Performance Information Location [Text Block] | Visit blackrock.com |
| Net Assets | $ 293,343,237 |
| Holdings Count | Holding | 181 |
| Advisory Fees Paid, Amount | $ 1,073,870 |
| Investment Company Portfolio Turnover | 10% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets $ % Number of Portfolio Holdings $ % Net Investment Advisory Fees $ % Portfolio Turnover Rate $ % |
| Holdings [Text Block] | What did the Fund invest in? (as of May 31, 2024) Sector allocation Sector (a)(b) Percent of Transportation 30.3 % Education 15.9 % State 15.0 % Health 12.0 % County/City/Special District/School District 12.0 % Corporate 7.1 % Housing 3.5 % Utilities 2.8 % Tobacco 1.4 % Credit quality allocation Credit Rating (a)(c) Percent of AAA/Aaa 0.8 % AA/Aa 42.5 % A 44.4 % BBB/Baa 5.6 % BB/Ba 0.7 % N/R (d) 6.0 % (a) (b) (c) (d) Excludes short-term securities. (a) (b) (c) (d) For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes. (a) (b) (c) (d) For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. (a) (b) (c) (d) The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents 1.6% of total investments. |
| Credit Quality Explanation [Text Block] | The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents 1.6% of total investments. |
| Credit Ratings Selection [Text Block] | For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. |
| C000011309 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | BlackRock New Jersey Municipal Bond Fund |
| Class Name | Investor A1 Shares |
| Trading Symbol | MDNJX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about BlackRock New Jersey Municipal Bond Fund (the “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 about the Fund at blackrock.com/fundreports . |
| Additional Information Phone Number | (800) 441‑7762 |
| Additional Information Website | blackrock.com/fundreports |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class name Costs of a $10,000 Costs paid as a percentage of a Investor A1 Shares $ 0.62 % |
| Expenses Paid, Amount | $ 63 |
| Expense Ratio, Percent | 0.62% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year? The municipal bond market gained ground during the reporting period, with the benefit of income augmented by a modest gain in prices. Declining inflation fueled expectations that the U.S. Federal Reserve was set to begin cutting interest rates in 2024, benefiting the broader fixed-income market. New Jersey state-specific issuance has trailed historical norms for two consecutive years as increased revenues, prudent expenditure management, and federal stimulus has led to a reduced need to finance deficits. The lower level of supply contributed to a tightening of credit spreads, benefiting market performance. What contributed to performance? The Fund’s holdings in the tax-backed sector outpaced the New Jersey Customized Reference Benchmark (the "benchmark"). Out-of-benchmark positions in Puerto Rico, general obligation, and sales tax bonds, which attracted investor demand with their liquidity and higher yields, enhanced returns. An allocation to high-yield and non-rated securities, which exceeded the return of the investment-grade benchmark, also helped results. At the sector level, overweights in corporate-backed, education, and healthcare issues contributed. An overweight in bonds with maturities from 15 years to 30 years aided relative performance, as well. An overweight in low-coupon bonds with positive convexity, together with an underweight in standard 5% coupon bonds, was a further contributor. (A bond with positive convexity outperforms when rates fall.) The Fund’s cash position had no material impact on performance. What detracted from performance? A strategic underweight in New Jersey Transportation bonds, which had an outsized allocation in the benchmark, hurt results. An underweight in the tobacco sector also detracted, as did underweights in bonds rated B and BB. The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results. |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Line Graph [Table Text Block] | Fund performance Cumulative performance: June 1, 2014 through May 31, 2024 Initial investment of $10,000 See “Average annual total returns” for additional information on fund performance. |
| Average Annual Return [Table Text Block] | Average annual total returns 1 Year 5 Years 10 Years Investor A1 Shares 3.26 % 0.94 % 2.46 % Bloomberg Municipal Bond Index 2.67 % 0.93 % 2.25 % New Jersey Customized Reference Benchmark 3.18 % 1.70 % N/A |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| Updated Performance Information Location [Text Block] | Visit blackrock.com |
| Net Assets | $ 293,343,237 |
| Holdings Count | Holding | 181 |
| Advisory Fees Paid, Amount | $ 1,073,870 |
| Investment Company Portfolio Turnover | 10% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets $ % Number of Portfolio Holdings $ % Net Investment Advisory Fees $ % Portfolio Turnover Rate $ % |
| Holdings [Text Block] | What did the Fund invest in? (as of May 31, 2024) Sector allocation Sector (a)(b) Percent of Transportation 30.3 % Education 15.9 % State 15.0 % Health 12.0 % County/City/Special District/School District 12.0 % Corporate 7.1 % Housing 3.5 % Utilities 2.8 % Tobacco 1.4 % Credit quality allocation Credit Rating (a)(c) Percent of AAA/Aaa 0.8 % AA/Aa 42.5 % A 44.4 % BBB/Baa 5.6 % BB/Ba 0.7 % N/R (d) 6.0 % (a) (b) (c) (d) Excludes short-term securities. (a) (b) (c) (d) For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes. (a) (b) (c) (d) For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. (a) (b) (c) (d) The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents 1.6% of total investments. |
| Credit Quality Explanation [Text Block] | The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents 1.6% of total investments. |
| Credit Ratings Selection [Text Block] | For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. |
| C000011317 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | BlackRock Pennsylvania Municipal Bond Fund |
| Class Name | Investor A1 Shares |
| Trading Symbol | MDPYX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about BlackRock Pennsylvania Municipal Bond Fund (the “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 about the Fund at blackrock.com/fundreports . |
| Additional Information Phone Number | (800) 441‑7762 |
| Additional Information Website | blackrock.com/fundreports |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class name Costs of a $10,000 Costs paid as a percentage of a Investor A1 Shares $ 0.64 % |
| Expenses Paid, Amount | $ 65 |
| Expense Ratio, Percent | 0.64% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year? The municipal bond market gained ground during the reporting period, with the benefit of income augmented by a modest gain in prices. Declining inflation fueled expectations that the U.S. Federal Reserve was set to begin cutting interest rates in 2024, benefiting the broader fixed-income market. Municipal bonds were further helped by positive economic growth, strong issuer fundamentals, and favorable supply-and-demand trends. What contributed to performance? Holdings in the tax-backed sector outpaced the Pennsylvania Customized Reference Benchmark (the "benchmark"). The Fund’s out-of-benchmark allocation to Puerto Rico general obligation and sales tax bonds, which attracted investor demand with their liquidity and higher yields, enhanced returns. Positions in high-yield and non-rated securities, which exceeded the return of the investment-grade benchmark, were also beneficial. What detracted from performance? A strategic underweight in Pennsylvania Turnpike bonds, which have an outsized allocation in the benchmark, hurt results. Holdings in the housing sector detracted, as well. The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results. |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Line Graph [Table Text Block] | Fund performance Cumulative performance: June 1, 2014 through May 31, 2024 Initial investment of $10,000 See “Average annual total returns” for additional information on fund performance. |
| Average Annual Return [Table Text Block] | Average annual total returns 1 Year 5 Years 10 Years Investor A1 Shares 3.22 % 0.22 % 2.02 % Bloomberg Municipal Bond Index 2.67 % 0.93 % 2.25 % Pennsylvania Customized Reference Benchmark 3.23 % 1.01 % N/A |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| Updated Performance Information Location [Text Block] | Visit blackrock.com |
| Net Assets | $ 344,637,974 |
| Holdings Count | Holding | 167 |
| Advisory Fees Paid, Amount | $ 1,432,616 |
| Investment Company Portfolio Turnover | 18% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets $ % Number of Portfolio Holdings $ % Net Investment Advisory Fees $ % Portfolio Turnover Rate $ % |
| Holdings [Text Block] | What did the Fund invest in? (as of May 31, 2024) Sector allocation Sector (a)(b) Percent of Health 21.6 % Transportation 18.0 % County/City/Special District/School District 17.1 % Education 16.1 % Corporate 7.8 % Housing 6.9 % Utilities 6.3 % State 3.6 % Tobacco 2.6 % Credit quality allocation Credit Rating (a)(c) Percent of AA/Aa 42.9 % A 31.1 % BBB/Baa 8.7 % BB/Ba 3.3 % B 0.7 % N/R (d) 13.3 % (a) (b) (c) (d) Excludes short-term securities. (a) (b) (c) (d) For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes. (a) (b) (c) (d) For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. (a) (b) (c) (d) The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents less than 1.0% of total investments. |
| Credit Quality Explanation [Text Block] | The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents less than 1.0% of total investments. |
| Credit Ratings Selection [Text Block] | For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. |
| C000038306 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | BlackRock Pennsylvania Municipal Bond Fund |
| Class Name | Service Shares |
| Trading Symbol | MSPYX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about BlackRock Pennsylvania Municipal Bond Fund (the “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 about the Fund at blackrock.com/fundreports . |
| Additional Information Phone Number | (800) 441‑7762 |
| Additional Information Website | blackrock.com/fundreports |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Class name Costs of a $10,000 Costs paid as a percentage of a Service Shares $ 0.79 % |
| Expenses Paid, Amount | $ 80 |
| Expense Ratio, Percent | 0.79% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year? The municipal bond market gained ground during the reporting period, with the benefit of income augmented by a modest gain in prices. Declining inflation fueled expectations that the U.S. Federal Reserve was set to begin cutting interest rates in 2024, benefiting the broader fixed-income market. Municipal bonds were further helped by positive economic growth, strong issuer fundamentals, and favorable supply-and-demand trends. What contributed to performance? Holdings in the tax-backed sector outpaced the Pennsylvania Customized Reference Benchmark (the "benchmark"). The Fund’s out-of-benchmark allocation to Puerto Rico general obligation and sales tax bonds, which attracted investor demand with their liquidity and higher yields, enhanced returns. Positions in high-yield and non-rated securities, which exceeded the return of the investment-grade benchmark, were also beneficial. What detracted from performance? A strategic underweight in Pennsylvania Turnpike bonds, which have an outsized allocation in the benchmark, hurt results. Holdings in the housing sector detracted, as well. The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results. |
| Performance Past Does Not Indicate Future [Text] | Past performance is not an indication of future results. |
| Line Graph [Table Text Block] | Fund performance Cumulative performance: June 1, 2014 through May 31, 2024 Initial investment of $10,000 See “Average annual total returns” for additional information on fund performance. |
| Average Annual Return [Table Text Block] | Average annual total returns 1 Year 5 Years 10 Years Service Shares 3.17 % 0.07 % 1.87 % Bloomberg Municipal Bond Index 2.67 % 0.93 % 2.25 % Pennsylvania Customized Reference Benchmark 3.23 % 1.01 % N/A |
| No Deduction of Taxes [Text Block] | Performance results do not reflect the deduction of taxes that a shareholder would pay on fund distributions or on the redemption or sale of fund shares. |
| Updated Performance Information Location [Text Block] | Visit blackrock.com |
| Net Assets | $ 344,637,974 |
| Holdings Count | Holding | 167 |
| Advisory Fees Paid, Amount | $ 1,432,616 |
| Investment Company Portfolio Turnover | 18% |
| Additional Fund Statistics [Text Block] | Key Fund statistics Net Assets $ % Number of Portfolio Holdings $ % Net Investment Advisory Fees $ % Portfolio Turnover Rate $ % |
| Holdings [Text Block] | What did the Fund invest in? (as of May 31, 2024) Sector allocation Sector (a)(b) Percent of Health 21.6 % Transportation 18.0 % County/City/Special District/School District 17.1 % Education 16.1 % Corporate 7.8 % Housing 6.9 % Utilities 6.3 % State 3.6 % Tobacco 2.6 % Credit quality allocation Credit Rating (a)(c) Percent of AA/Aa 42.9 % A 31.1 % BBB/Baa 8.7 % BB/Ba 3.3 % B 0.7 % N/R (d) 13.3 % (a) (b) (c) (d) Excludes short-term securities. (a) (b) (c) (d) For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes. (a) (b) (c) (d) For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. (a) (b) (c) (d) The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents less than 1.0% of total investments. |
| Credit Quality Explanation [Text Block] | The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents less than 1.0% of total investments. |
| Credit Ratings Selection [Text Block] | For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. |
| 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 | |
| C000038303 [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Investor A Shares (with sales charge) | |||||||||||
| Account Value | $ 11,519 | $ 11,519 | $ 11,519 | $ 11,165 | $ 11,399 | $ 12,360 | $ 11,452 | $ 11,474 | $ 10,922 | $ 10,733 | $ 10,670 | $ 10,029 |
| Average Annual Return, Percent | (1.21%) | (0.79%) | 1.42% | |||||||||
| C000038303 [Member] | Without Sales Load [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Investor A Shares | |||||||||||
| Average Annual Return, Percent | 3.17% | 0.08% | 1.86% | |||||||||
| C000038305 [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Investor C Shares (with sales charge) | |||||||||||
| Account Value | $ 11,331 | $ 11,331 | $ 11,331 | 10,982 | 11,212 | 12,250 | 11,436 | 11,545 | 11,072 | 10,962 | 10,980 | 10,401 |
| Average Annual Return, Percent | 1.29% | (0.70%) | 1.26% | |||||||||
| C000038305 [Member] | Without Sales Load [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Investor C Shares | |||||||||||
| Average Annual Return, Percent | 2.29% | (0.70%) | 1.26% | |||||||||
| C000011320 [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Institutional Shares | |||||||||||
| Account Value | $ 12,307 | $ 12,307 | $ 12,307 | 11,912 | 12,132 | 13,125 | 12,130 | 12,124 | 11,513 | 11,285 | 11,194 | 10,502 |
| Average Annual Return, Percent | 3.32% | 0.30% | 2.10% | |||||||||
| C000038247 [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Investor C Shares (with sales charge) | |||||||||||
| Account Value | $ 11,836 | $ 11,836 | $ 11,836 | 11,468 | 11,436 | 12,469 | 11,425 | 11,642 | 11,088 | 10,801 | 10,845 | 10,204 |
| Average Annual Return, Percent | 1.44% | 0.03% | 1.70% | |||||||||
| C000038247 [Member] | Without Sales Load [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Investor C Shares | |||||||||||
| Average Annual Return, Percent | 2.43% | 0.03% | 1.70% | |||||||||
| C000038245 [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Investor A Shares (with sales charge) | |||||||||||
| Account Value | $ 12,029 | $ 12,029 | $ 12,029 | 11,655 | 11,622 | 12,575 | 11,437 | 11,567 | 10,934 | 10,572 | 10,535 | 9,846 |
| Average Annual Return, Percent | (1.18%) | (0.08%) | 1.86% | |||||||||
| C000038245 [Member] | Without Sales Load [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Investor A Shares | |||||||||||
| Average Annual Return, Percent | 3.21% | 0.79% | 2.31% | |||||||||
| C000038248 [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Service Shares | |||||||||||
| Account Value | $ 12,560 | $ 12,560 | $ 12,560 | 12,169 | 12,136 | 13,133 | 11,944 | 12,081 | 11,420 | 11,041 | 11,002 | 10,283 |
| Average Annual Return, Percent | 3.20% | 0.78% | 2.31% | |||||||||
| C000199769 [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Class K Shares | |||||||||||
| Account Value | $ 12,875 | $ 12,875 | $ 12,875 | 12,438 | 12,367 | 13,343 | 12,087 | 12,201 | 11,488 | 11,088 | 11,026 | 10,293 |
| Average Annual Return, Percent | 3.51% | 1.08% | 2.56% | |||||||||
| C000199770 [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Class K Shares | |||||||||||
| Account Value | $ 12,346 | $ 12,346 | $ 12,346 | 11,944 | 12,158 | 13,147 | 12,144 | 12,122 | 11,515 | 11,285 | 11,194 | 10,502 |
| Average Annual Return, Percent | 3.37% | 0.37% | 2.13% | |||||||||
| C000011312 [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Institutional Shares | |||||||||||
| Account Value | $ 12,835 | $ 12,835 | $ 12,835 | 12,405 | 12,340 | 13,321 | 12,084 | 12,192 | 11,497 | 11,088 | 11,026 | 10,293 |
| Average Annual Return, Percent | 3.46% | 1.03% | 2.53% | |||||||||
| C000011309 [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Investor A1 Shares | |||||||||||
| Account Value | $ 12,744 | $ 12,744 | $ 12,744 | 12,341 | 12,288 | 13,264 | 12,045 | 12,163 | 11,480 | 11,093 | 11,029 | 10,295 |
| Average Annual Return, Percent | 3.26% | 0.94% | 2.46% | |||||||||
| C000011317 [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Investor A1 Shares | |||||||||||
| Account Value | $ 12,211 | $ 12,211 | $ 12,211 | 11,831 | 12,061 | 13,046 | 12,082 | 12,076 | 11,489 | 11,262 | 11,189 | 10,500 |
| Average Annual Return, Percent | 3.22% | 0.22% | 2.02% | |||||||||
| C000038306 [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Service Shares | |||||||||||
| Account Value | $ 12,038 | $ 12,038 | $ 12,038 | 11,669 | 11,913 | 12,919 | 11,970 | 11,994 | 11,417 | 11,219 | 11,154 | 10,474 |
| Average Annual Return, Percent | 3.17% | 0.07% | 1.87% | |||||||||
| Bloomberg Municipal Bond Index [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||||||||||
| Account Value | $ 12,488 | $ 12,488 | $ 12,488 | $ 12,163 | $ 12,104 | $ 12,986 | $ 12,399 | $ 11,925 | $ 11,207 | $ 11,083 | $ 10,924 | $ 10,318 |
| Average Annual Return, Percent | 2.67% | 0.93% | 2.25% | |||||||||
| Pennsylvania Customized Reference Benchmark [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Pennsylvania Customized Reference Benchmark | |||||||||||
| Average Annual Return, Percent | 3.23% | 1.01% | ||||||||||
| New Jersey Customized Reference Benchmark [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | New Jersey Customized Reference Benchmark | |||||||||||
| Average Annual Return, Percent | 3.18% | 1.70% |
| Shareholder Report, Holdings (Details) | May 31, 2024 | |
| C000038303 [Member] | N R [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 13.30% | [1],[2],[3] |
| C000038303 [Member] | State [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 3.60% | [1],[4] |
| C000038303 [Member] | County City Special District School District [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 17.10% | [1],[4] |
| C000038303 [Member] | Housing [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 6.90% | [1],[4] |
| C000038303 [Member] | Transportation Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 18% | [1],[4] |
| C000038303 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 6.30% | [1],[4] |
| C000038303 [Member] | Education [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 16.10% | [1],[4] |
| C000038303 [Member] | Tobacco [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 2.60% | [1],[4] |
| C000038303 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 21.60% | [1],[4] |
| C000038303 [Member] | Corporate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 7.80% | [1],[4] |
| C000038305 [Member] | N R [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 13.30% | [5],[6],[7] |
| C000038305 [Member] | State [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 3.60% | [5],[8] |
| C000038305 [Member] | County City Special District School District [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 17.10% | [5],[8] |
| C000038305 [Member] | Housing [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 6.90% | [5],[8] |
| C000038305 [Member] | Transportation Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 18% | [5],[8] |
| C000038305 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 6.30% | [5],[8] |
| C000038305 [Member] | Education [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 16.10% | [5],[8] |
| C000038305 [Member] | Tobacco [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 2.60% | [5],[8] |
| C000038305 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 21.60% | [5],[8] |
| C000038305 [Member] | Corporate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 7.80% | [5],[8] |
| C000011320 [Member] | N R [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 13.30% | [9],[10],[11] |
| C000011320 [Member] | State [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 3.60% | [9],[12] |
| C000011320 [Member] | County City Special District School District [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 17.10% | [9],[12] |
| C000011320 [Member] | Housing [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 6.90% | [9],[12] |
| C000011320 [Member] | Transportation Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 18% | [9],[12] |
| C000011320 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 6.30% | [9],[12] |
| C000011320 [Member] | Education [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 16.10% | [9],[12] |
| C000011320 [Member] | Tobacco [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 2.60% | [9],[12] |
| C000011320 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 21.60% | [9],[12] |
| C000011320 [Member] | Corporate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 7.80% | [9],[12] |
| C000038247 [Member] | N R [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 6% | [13],[14],[15] |
| C000038247 [Member] | State [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 15% | [13],[16] |
| C000038247 [Member] | County City Special District School District [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 12% | [13],[16] |
| C000038247 [Member] | Housing [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 3.50% | [13],[16] |
| C000038247 [Member] | Transportation Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 30.30% | [13],[16] |
| C000038247 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 2.80% | [13],[16] |
| C000038247 [Member] | Education [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 15.90% | [13],[16] |
| C000038247 [Member] | Tobacco [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 1.40% | [13],[16] |
| C000038247 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 12% | [13],[16] |
| C000038247 [Member] | Corporate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 7.10% | [13],[16] |
| C000038245 [Member] | N R [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 6% | [17],[18],[19] |
| C000038245 [Member] | State [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 15% | [17],[20] |
| C000038245 [Member] | County City Special District School District [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 12% | [17],[20] |
| C000038245 [Member] | Housing [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 3.50% | [17],[20] |
| C000038245 [Member] | Transportation Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 30.30% | [17],[20] |
| C000038245 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 2.80% | [17],[20] |
| C000038245 [Member] | Education [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 15.90% | [17],[20] |
| C000038245 [Member] | Tobacco [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 1.40% | [17],[20] |
| C000038245 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 12% | [17],[20] |
| C000038245 [Member] | Corporate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 7.10% | [17],[20] |
| C000038248 [Member] | N R [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 6% | [21],[22],[23] |
| C000038248 [Member] | State [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 15% | [21],[24] |
| C000038248 [Member] | County City Special District School District [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 12% | [21],[24] |
| C000038248 [Member] | Housing [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 3.50% | [21],[24] |
| C000038248 [Member] | Transportation Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 30.30% | [21],[24] |
| C000038248 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 2.80% | [21],[24] |
| C000038248 [Member] | Education [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 15.90% | [21],[24] |
| C000038248 [Member] | Tobacco [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 1.40% | [21],[24] |
| C000038248 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 12% | [21],[24] |
| C000038248 [Member] | Corporate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 7.10% | [21],[24] |
| C000199769 [Member] | N R [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 6% | [25],[26],[27] |
| C000199769 [Member] | State [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 15% | [25],[28] |
| C000199769 [Member] | County City Special District School District [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 12% | [25],[28] |
| C000199769 [Member] | Housing [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 3.50% | [25],[28] |
| C000199769 [Member] | Transportation Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 30.30% | [25],[28] |
| C000199769 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 2.80% | [25],[28] |
| C000199769 [Member] | Education [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 15.90% | [25],[28] |
| C000199769 [Member] | Tobacco [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 1.40% | [25],[28] |
| C000199769 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 12% | [25],[28] |
| C000199769 [Member] | Corporate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 7.10% | [25],[28] |
| C000199770 [Member] | N R [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 13.30% | [29],[30],[31] |
| C000199770 [Member] | State [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 3.60% | [29],[32] |
| C000199770 [Member] | County City Special District School District [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 17.10% | [29],[32] |
| C000199770 [Member] | Housing [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 6.90% | [29],[32] |
| C000199770 [Member] | Transportation Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 18% | [29],[32] |
| C000199770 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 6.30% | [29],[32] |
| C000199770 [Member] | Education [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 16.10% | [29],[32] |
| C000199770 [Member] | Tobacco [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 2.60% | [29],[32] |
| C000199770 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 21.60% | [29],[32] |
| C000199770 [Member] | Corporate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 7.80% | [29],[32] |
| C000011312 [Member] | N R [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 6% | [33],[34],[35] |
| C000011312 [Member] | State [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 15% | [33],[36] |
| C000011312 [Member] | County City Special District School District [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 12% | [33],[36] |
| C000011312 [Member] | Housing [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 3.50% | [33],[36] |
| C000011312 [Member] | Transportation Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 30.30% | [33],[36] |
| C000011312 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 2.80% | [33],[36] |
| C000011312 [Member] | Education [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 15.90% | [33],[36] |
| C000011312 [Member] | Tobacco [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 1.40% | [33],[36] |
| C000011312 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 12% | [33],[36] |
| C000011312 [Member] | Corporate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 7.10% | [33],[36] |
| C000011309 [Member] | N R [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 6% | [37],[38],[39] |
| C000011309 [Member] | State [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 15% | [37],[40] |
| C000011309 [Member] | County City Special District School District [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 12% | [37],[40] |
| C000011309 [Member] | Housing [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 3.50% | [37],[40] |
| C000011309 [Member] | Transportation Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 30.30% | [37],[40] |
| C000011309 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 2.80% | [37],[40] |
| C000011309 [Member] | Education [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 15.90% | [37],[40] |
| C000011309 [Member] | Tobacco [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 1.40% | [37],[40] |
| C000011309 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 12% | [37],[40] |
| C000011309 [Member] | Corporate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 7.10% | [37],[40] |
| C000011317 [Member] | N R [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 13.30% | [41],[42],[43] |
| C000011317 [Member] | State [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 3.60% | [41],[44] |
| C000011317 [Member] | County City Special District School District [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 17.10% | [41],[44] |
| C000011317 [Member] | Housing [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 6.90% | [41],[44] |
| C000011317 [Member] | Transportation Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 18% | [41],[44] |
| C000011317 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 6.30% | [41],[44] |
| C000011317 [Member] | Education [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 16.10% | [41],[44] |
| C000011317 [Member] | Tobacco [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 2.60% | [41],[44] |
| C000011317 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 21.60% | [41],[44] |
| C000011317 [Member] | Corporate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 7.80% | [41],[44] |
| C000038306 [Member] | N R [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 13.30% | [45],[46],[47] |
| C000038306 [Member] | State [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 3.60% | [45],[48] |
| C000038306 [Member] | County City Special District School District [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 17.10% | [45],[48] |
| C000038306 [Member] | Housing [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 6.90% | [45],[48] |
| C000038306 [Member] | Transportation Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 18% | [45],[48] |
| C000038306 [Member] | Utilities Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 6.30% | [45],[48] |
| C000038306 [Member] | Education [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 16.10% | [45],[48] |
| C000038306 [Member] | Tobacco [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 2.60% | [45],[48] |
| C000038306 [Member] | Healthcare Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 21.60% | [45],[48] |
| C000038306 [Member] | Corporate Sector [Member] | ||
| Holdings [Line Items] | ||
| Percent of Total Investments | 7.80% | [45],[48] |
| [1]Excludes short-term securities.[2]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[3]The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents less than 1.0% of total investments.[4]For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes.[5]Excludes short-term securities.[6]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[7]The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents less than 1.0% of total investments.[8]For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes.[9]Excludes short-term securities.[10]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[11]The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents less than 1.0% of total investments.[12]For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes.[13]Excludes short-term securities.[14]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[15]The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents 1.6% of total investments.[16]For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes.[17]Excludes short-term securities.[18]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[19]The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents 1.6% of total investments.[20]For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes.[21]Excludes short-term securities.[22]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[23]The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents 1.6% of total investments.[24]For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes.[25]Excludes short-term securities.[26]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[27]The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents 1.6% of total investments.[28]For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes.[29]Excludes short-term securities.[30]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[31]The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents less than 1.0% of total investments.[32]For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes.[33]Excludes short-term securities.[34]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[35]The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents 1.6% of total investments.[36]For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes.[37]Excludes short-term securities.[38]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[39]The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents 1.6% of total investments.[40]For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes.[41]Excludes short-term securities.[42]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[43]The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents less than 1.0% of total investments.[44]For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes.[45]Excludes short-term securities.[46]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[47]The investment adviser evaluates the credit quality of unrated investments based upon certain factors including, but not limited to, credit ratings for similar investments and financial analysis of sectors and individual investments. Using this approach, the investment adviser has deemed certain of these unrated securities as investment grade quality. As of May 31, 2024, the market value of unrated securities deemed by the investment adviser to be investment grade represents less than 1.0% of total investments.[48]For purposes of this report, sector sub-classifications may differ from those utilized for compliance purposes. | ||
| Label | Element | Value | |
| C000038248 [Member] | Standard & Poor's, A Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 44.40% | [1],[2] |
| C000038248 [Member] | Standard & Poor's, BBB Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 5.60% | [1],[2] |
| C000038248 [Member] | Standard & Poor's, AA Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 42.50% | [1],[2] |
| C000038248 [Member] | Standard & Poor's, AAA Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 0.80% | [1],[2] |
| C000038248 [Member] | Standard & Poor's, BB Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 0.70% | [1],[2] |
| C000011320 [Member] | Standard & Poor's, A Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 31.10% | [3],[4] |
| C000011320 [Member] | Standard & Poor's, BBB Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 8.70% | [3],[4] |
| C000011320 [Member] | Standard & Poor's, AA Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 42.90% | [3],[4] |
| C000011320 [Member] | Standard & Poor's, B Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 0.70% | [3],[4] |
| C000011320 [Member] | Standard & Poor's, BB Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 3.30% | [3],[4] |
| C000199770 [Member] | Standard & Poor's, A Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 31.10% | [5],[6] |
| C000199770 [Member] | Standard & Poor's, BBB Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 8.70% | [5],[6] |
| C000199770 [Member] | Standard & Poor's, AA Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 42.90% | [5],[6] |
| C000199770 [Member] | Standard & Poor's, B Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 0.70% | [5],[6] |
| C000199770 [Member] | Standard & Poor's, BB Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 3.30% | [5],[6] |
| C000011317 [Member] | Standard & Poor's, A Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 31.10% | [7],[8] |
| C000011317 [Member] | Standard & Poor's, BBB Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 8.70% | [7],[8] |
| C000011317 [Member] | Standard & Poor's, AA Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 42.90% | [7],[8] |
| C000011317 [Member] | Standard & Poor's, B Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 0.70% | [7],[8] |
| C000011317 [Member] | Standard & Poor's, BB Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 3.30% | [7],[8] |
| C000038306 [Member] | Standard & Poor's, A Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 31.10% | [9],[10] |
| C000038306 [Member] | Standard & Poor's, BBB Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 8.70% | [9],[10] |
| C000038306 [Member] | Standard & Poor's, AA Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 42.90% | [9],[10] |
| C000038306 [Member] | Standard & Poor's, B Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 0.70% | [9],[10] |
| C000038306 [Member] | Standard & Poor's, BB Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 3.30% | [9],[10] |
| C000038305 [Member] | Standard & Poor's, A Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 31.10% | [11],[12] |
| C000038305 [Member] | Standard & Poor's, BBB Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 8.70% | [11],[12] |
| C000038305 [Member] | Standard & Poor's, AA Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 42.90% | [11],[12] |
| C000038305 [Member] | Standard & Poor's, B Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 0.70% | [11],[12] |
| C000038305 [Member] | Standard & Poor's, BB Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 3.30% | [11],[12] |
| C000199769 [Member] | Standard & Poor's, A Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 44.40% | [13],[14] |
| C000199769 [Member] | Standard & Poor's, BBB Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 5.60% | [13],[14] |
| C000199769 [Member] | Standard & Poor's, AA Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 42.50% | [13],[14] |
| C000199769 [Member] | Standard & Poor's, AAA Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 0.80% | [13],[14] |
| C000199769 [Member] | Standard & Poor's, BB Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 0.70% | [13],[14] |
| C000038303 [Member] | Standard & Poor's, A Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 31.10% | [15],[16] |
| C000038303 [Member] | Standard & Poor's, BBB Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 8.70% | [15],[16] |
| C000038303 [Member] | Standard & Poor's, AA Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 42.90% | [15],[16] |
| C000038303 [Member] | Standard & Poor's, B Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 0.70% | [15],[16] |
| C000038303 [Member] | Standard & Poor's, BB Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 3.30% | [15],[16] |
| C000038247 [Member] | Standard & Poor's, A Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 44.40% | [17],[18] |
| C000038247 [Member] | Standard & Poor's, BBB Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 5.60% | [17],[18] |
| C000038247 [Member] | Standard & Poor's, AA Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 42.50% | [17],[18] |
| C000038247 [Member] | Standard & Poor's, AAA Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 0.80% | [17],[18] |
| C000038247 [Member] | Standard & Poor's, BB Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 0.70% | [17],[18] |
| C000038245 [Member] | Standard & Poor's, A Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 44.40% | [19],[20] |
| C000038245 [Member] | Standard & Poor's, BBB Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 5.60% | [19],[20] |
| C000038245 [Member] | Standard & Poor's, AA Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 42.50% | [19],[20] |
| C000038245 [Member] | Standard & Poor's, AAA Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 0.80% | [19],[20] |
| C000038245 [Member] | Standard & Poor's, BB Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 0.70% | [19],[20] |
| C000011312 [Member] | Standard & Poor's, A Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 44.40% | [21],[22] |
| C000011312 [Member] | Standard & Poor's, BBB Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 5.60% | [21],[22] |
| C000011312 [Member] | Standard & Poor's, AA Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 42.50% | [21],[22] |
| C000011312 [Member] | Standard & Poor's, AAA Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 0.80% | [21],[22] |
| C000011312 [Member] | Standard & Poor's, BB Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 0.70% | [21],[22] |
| C000011309 [Member] | Standard & Poor's, A Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 44.40% | [23],[24] |
| C000011309 [Member] | Standard & Poor's, BBB Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 5.60% | [23],[24] |
| C000011309 [Member] | Standard & Poor's, AA Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 42.50% | [23],[24] |
| C000011309 [Member] | Standard & Poor's, AAA Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 0.80% | [23],[24] |
| C000011309 [Member] | Standard & Poor's, BB Rating [Member] | |||
| Percent of Total Investments | oef_PctOfTotalInv | 0.70% | [23],[24] |
| [1]Excludes short-term securities.[2]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[3]Excludes short-term securities.[4]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[5]Excludes short-term securities.[6]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[7]Excludes short-term securities.[8]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[9]Excludes short-term securities.[10]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[11]Excludes short-term securities.[12]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[13]Excludes short-term securities.[14]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[15]Excludes short-term securities.[16]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[17]Excludes short-term securities.[18]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[19]Excludes short-term securities.[20]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[21]Excludes short-term securities.[22]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change.[23]Excludes short-term securities.[24]For purposes of this report, credit quality ratings shown above reflect the highest rating assigned by either S&P Global Ratings or Moody’s Investors Service, Inc. if ratings differ. These rating agencies are independent, nationally recognized statistical rating organizations and are widely used. Investment grade ratings are credit ratings of BBB/Baa or higher. Below investment grade ratings are credit ratings of BB/Ba or lower. Investments designated N/R are not rated by either rating agency. Unrated investments do not necessarily indicate low credit quality. Credit quality ratings are subject to change. | |||
