| Shareholder Report | 12 Months Ended |
| Oct. 31, 2024 USD ($) Holding |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | Columbia Funds Series Trust I |
| Entity Central Index Key | 0000773757 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Oct. 31, 2024 |
| Columbia New York Intermediate Municipal Bond Fund - Class A | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia New York Intermediate Municipal Bond Fund |
| Class Name | Class A |
| Trading Symbol | LNYAX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Columbia New York Intermediate Municipal Bond Fund (the Fund) for the period of November 1, 2023 to October 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature 1-800-345-6611. |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-345-6611 |
| Additional Information Website | columbiathreadneedleus.com/resources/literature |
| Expenses [Text Block] | What were the Fund costs for the reporting period? (Based on a hypothetical $10,000 investment) Class Cost of a $10,000 investment Cost paid as a percentage of a $10,000 investment Class A $ 0.74 % |
| Expenses Paid, Amount | $ 76 |
| Expense Ratio, Percent | 0.74% |
| Factors Affecting Performance [Text Block] | Management's Discussion of Fund Performance The performance of Class A shares for the period presented is shown in the Average Annual Total Returns table. Top Performance Contributors Allocations Security selection Top Performance Detractors Allocations Security selection |
| Performance Past Does Not Indicate Future [Text] | Past performance does not guarantee future performance. |
| Line Graph [Table Text Block] | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns (%) 1 year 5 years 10 years Class A (excluding sales charges) (a) 6.49 0.43 1.48 Class A (including sales charges) (a) 3.27 (0.17 ) 1.17 Bloomberg New York 3-15 Year Blend Municipal Bond Index 7.70 1.10 2.05 Bloomberg Municipal Bond Index 9.70 1.05 2.30 (a) Effective August 1, 2024, the Fund compares its performance to the Bloomberg Municipal Bond Index, a broad-based performance index that meets new regulatory requirements. The Fund’s performance is also compared to its prior benchmark, which more closely represents the market sectors and/or asset classes in which the Fund primarily invests. |
| No Deduction of Taxes [Text Block] | Performance does not reflect the deduction of taxes that a shareholder may pay on fund distributions or on the redemptions of fund shares. |
| Performance Table Market Index Changed [Text Block] | Effective August 1, 2024, the Fund compares its performance to the Bloomberg Municipal Bond Index, a broad-based performance index that meets new regulatory requirements. |
| Prior Market Index Comparison [Text Block] | The Fund’s performance is also compared to its prior benchmark, which more closely represents the market sectors and/or asset classes in which the Fund primarily invests. |
| Material Change Date | Aug. 01, 2024 |
| Updated Performance Information Location [Text Block] | Visit columbiathreadneedleus.com/investment-products/mutual-funds |
| Net Assets | $ 99,422,082 |
| Holdings Count | Holding | 107 |
| Advisory Fees Paid, Amount | $ 515,798 |
| Investment Company, Portfolio Turnover | 13% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 107 Management services fees $ Portfolio turnover for the reporting period 13% |
| Holdings [Text Block] | Graphical Representation of Fund The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change. Bond ratings on Fund holdings are divided into categories ranging from highest to lowest credit quality, determined by using the middle rating of Moody’s Ratings, S&P and Fitch, after dropping the highest and lowest available ratings. When ratings are available from only two rating agencies, the lower rating is used. When a rating is available from only one rating agency, that rating is used. If a security is not rated by Moody's Ratings, S&P or Fitch, but has a rating by Kroll and/or DBRS, the same methodology is applied to those bonds that would otherwise be not rated. When a bond is not rated by any rating agency, it is designated as “Not rated.” Credit quality ratings assigned by a rating agency are subjective opinions, not statements of fact, and are subject to change, including daily. Top Holdings New York State Dormitory Authority 3.7 % Metropolitan Transportation Authority 2.7 % New York City Transitional Finance Authority 2.7 % Port Authority of New York & New Jersey 2.6 % Triborough Bridge & Tunnel Authority 2.3 % Long Island Power Authority 2.2 % City of Yonkers 2.2 % New York State Thruway Authority 2.2 % New York State Dormitory Authority 2.2 % New York State Dormitory Authority 2.1 % Asset C ate Credit Quality |
| Credit Quality Explanation [Text Block] | Bond ratings on Fund holdings are divided into categories ranging from highest to lowest credit quality, determined by using the middle rating of Moody’s Ratings, S&P and Fitch, after dropping the highest and lowest available ratings. When ratings are available from only two rating agencies, the lower rating is used. When a rating is available from only one rating agency, that rating is used. If a security is not rated by Moody's Ratings, S&P or Fitch, but has a rating by Kroll and/or DBRS, the same methodology is applied to those bonds that would otherwise be not rated. When a bond is not rated by any rating agency, it is designated as “Not rated.” Credit quality ratings assigned by a rating agency are subjective opinions, not statements of fact, and are subject to change, including daily. |
| Largest Holdings [Text Block] | Top Holdings New York State Dormitory Authority 3.7 % Metropolitan Transportation Authority 2.7 % New York City Transitional Finance Authority 2.7 % Port Authority of New York & New Jersey 2.6 % Triborough Bridge & Tunnel Authority 2.3 % Long Island Power Authority 2.2 % City of Yonkers 2.2 % New York State Thruway Authority 2.2 % New York State Dormitory Authority 2.2 % New York State Dormitory Authority 2.1 % |
| Material Fund Change [Text Block] | Certain Fund Changes This is a summary of certain changes to the Fund during the reporting period. For more complete information, you may review the Fund’s prospectus, which is available at columbiathreadneedleus.com/resources/literature Effective August 1, 2024, the Fund amended its Prospectus’ Principal Investment Strategies to reflect that the Fund may enter into tender option bond (TOB) transactions and may invest in derivatives, such as floating rate municipal securities (floaters) and inverse floating rate municipal securities (inverse floaters) to add incremental income, futures (including interest rate and Treasury bond futures) to manage duration and hedge against changes in interest rates, and swaps, including Municipal Market Data Rate Locks (MMD Rate Locks) to manage duration and hedge against changes in interest rates. In addition, the Fund amended its Prospectus’ Principal Risks to include disclosure of the risks associated with investing in these instruments and derivatives generally. |
| Material Fund Change Strategies [Text Block] | Effective August 1, 2024, the Fund amended its Prospectus’ Principal Investment Strategies to reflect that the Fund may enter into tender option bond (TOB) transactions and may invest in derivatives, such as floating rate municipal securities (floaters) and inverse floating rate municipal securities (inverse floaters) to add incremental income, futures (including interest rate and Treasury bond futures) to manage duration and hedge against changes in interest rates, and swaps, including Municipal Market Data Rate Locks (MMD Rate Locks) to manage duration and hedge against changes in interest rates. |
| Material Fund Change Risks Change [Text Block] | In addition, the Fund amended its Prospectus’ Principal Risks to include disclosure of the risks associated with investing in these instruments and derivatives generally. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund during the reporting period. For more complete information, you may review the Fund’s prospectus, which is available at columbiathreadneedleus.com/resources/literature |
| Updated Prospectus Phone Number | 1-800-345-6611 |
| Updated Prospectus Web Address | columbiathreadneedleus.com/resources/literature |
| Columbia New York Intermediate Municipal Bond Fund - Advisor Class | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia New York Intermediate Municipal Bond Fund |
| Class Name | Advisor Class |
| Trading Symbol | CNYIX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Columbia New York Intermediate Municipal Bond Fund (the Fund) for the period of November 1, 2023 to October 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature 1-800-345-6611. |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-345-6611 |
| Additional Information Website | columbiathreadneedleus.com/resources/literature |
| Expenses [Text Block] | What were the Fund costs for the reporting period? (Based on a hypothetical $10,000 investment) Class Cost of a $10,000 investment Cost paid as a percentage of a $10,000 investment Advisor Class $ 0.49 % |
| Expenses Paid, Amount | $ 51 |
| Expense Ratio, Percent | 0.49% |
| Factors Affecting Performance [Text Block] | Management's Discussion of Fund Performance The performance of Advisor Class shares for the period presented is shown in the Average Annual Total Returns table. Top Performance Contributors Allocations driven Security selection Top Performance Detractors Allocations from Security selection |
| Performance Past Does Not Indicate Future [Text] | Past performance does not guarantee future performance. |
| Line Graph [Table Text Block] | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns (%) 1 year 5 years 10 years Advisor Class (a) 6.86 0.68 1.74 Bloomberg New York 3-15 Year Blend Municipal Bond Index 7.70 1.10 2.05 Bloomberg Municipal Bond Index 9.70 1.05 2.30 (a) Effective August 1, 2024, the Fund compares its performance to the Bloomberg Municipal Bond Index, a broad-based performance index that meets new regulatory requirements. The Fund’s performance is also compared to its prior benchmark, which more closely represents the market sectors and/or asset classes in which the Fund primarily invests. |
| No Deduction of Taxes [Text Block] | Performance does not reflect the deduction of taxes that a shareholder may pay on fund distributions or on the redemptions of fund shares. |
| Performance Table Market Index Changed [Text Block] | Effective August 1, 2024, the Fund compares its performance to the Bloomberg Municipal Bond Index, a broad-based performance index that meets new regulatory requirements. |
| Prior Market Index Comparison [Text Block] | The Fund’s performance is also compared to its prior benchmark, which more closely represents the market sectors and/or asset classes in which the Fund primarily invests. |
| Material Change Date | Aug. 01, 2024 |
| Updated Performance Information Location [Text Block] | Visit columbiathreadneedleus.com/investment-products/mutual-funds |
| Net Assets | $ 99,422,082 |
| Holdings Count | Holding | 107 |
| Advisory Fees Paid, Amount | $ 515,798 |
| Investment Company, Portfolio Turnover | 13% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 107 Management services fees $ Portfolio turnover for the reporting period 13% |
| Holdings [Text Block] | Graphical Representation of Fund The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change. Bond ratings on Fund holdings are divided into categories ranging from highest to lowest credit quality, determined by using the middle rating of Moody’s Ratings, S&P and Fitch, after dropping the highest and lowest available ratings. When ratings are available from only two rating agencies, the lower rating is used. When a rating is available from only one rating agency, that rating is used. If a security is not rated by Moody's Ratings, S&P or Fitch, but has a rating by Kroll and/or DBRS, the same methodology is applied to those bonds that would otherwise be not rated. When a bond is not rated by any rating agency, it is designated as “Not rated.” Credit quality ratings assigned by a rating agency are subjective opinions, not statements of fact, and are subject to change, including daily. Top Holdings New York State Dormitory Authority 3.7 % Metropolitan Transportation Authority 2.7 % New York City Transitional Finance Authority 2.7 % Port Authority of New York & New Jersey 2.6 % Triborough Bridge & Tunnel Authority 2.3 % Long Island Power Authority 2.2 % City of Yonkers 2.2 % New York State Thruway Authority 2.2 % New York State Dormitory Authority 2.2 % New York State Dormitory Authority 2.1 % Asset Categories Credit Quality |
| Credit Quality Explanation [Text Block] | Bond ratings on Fund holdings are divided into categories ranging from highest to lowest credit quality, determined by using the middle rating of Moody’s Ratings, S&P and Fitch, after dropping the highest and lowest available ratings. When ratings are available from only two rating agencies, the lower rating is used. When a rating is available from only one rating agency, that rating is used. If a security is not rated by Moody's Ratings, S&P or Fitch, but has a rating by Kroll and/or DBRS, the same methodology is applied to those bonds that would otherwise be not rated. When a bond is not rated by any rating agency, it is designated as “Not rated.” Credit quality ratings assigned by a rating agency are subjective opinions, not statements of fact, and are subject to change, including daily. |
| Largest Holdings [Text Block] | Top Holdings New York State Dormitory Authority 3.7 % Metropolitan Transportation Authority 2.7 % New York City Transitional Finance Authority 2.7 % Port Authority of New York & New Jersey 2.6 % Triborough Bridge & Tunnel Authority 2.3 % Long Island Power Authority 2.2 % City of Yonkers 2.2 % New York State Thruway Authority 2.2 % New York State Dormitory Authority 2.2 % New York State Dormitory Authority 2.1 % |
| Material Fund Change [Text Block] | Certain Fund Changes This is a summary of certain changes to the Fund during the reporting period. For more complete information, you may review the Fund’s prospectus, which is available at columbiathreadneedleus.com/resources/literature Effective August 1, 2024, the Fund amended its Prospectus’ Principal Investment Strategies to reflect that the Fund may enter into tender option bond (TOB) transactions and may invest in derivatives, such as floating rate municipal securities (floaters) and inverse floating rate municipal securities (inverse floaters) to add incremental income, futures (including interest rate and Treasury bond futures) to manage duration and hedge against changes in interest rates, and swaps, including Municipal Market Data Rate Locks (MMD Rate Locks) to manage duration and hedge against changes in interest rates. In addition, the Fund amended its Prospectus’ Principal Risks to include disclosure of the risks associated with investing in these instruments and derivatives generally. |
| Material Fund Change Strategies [Text Block] | Effective August 1, 2024, the Fund amended its Prospectus’ Principal Investment Strategies to reflect that the Fund may enter into tender option bond (TOB) transactions and may invest in derivatives, such as floating rate municipal securities (floaters) and inverse floating rate municipal securities (inverse floaters) to add incremental income, futures (including interest rate and Treasury bond futures) to manage duration and hedge against changes in interest rates, and swaps, including Municipal Market Data Rate Locks (MMD Rate Locks) to manage duration and hedge against changes in interest rates. |
| Material Fund Change Risks Change [Text Block] | In addition, the Fund amended its Prospectus’ Principal Risks to include disclosure of the risks associated with investing in these instruments and derivatives generally. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund during the reporting period. For more complete information, you may review the Fund’s prospectus, which is available at columbiathreadneedleus.com/resources/literature |
| Updated Prospectus Phone Number | 1-800-345-6611 |
| Updated Prospectus Web Address | columbiathreadneedleus.com/resources/literature |
| Columbia New York Intermediate Municipal Bond Fund - Institutional Class | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia New York Intermediate Municipal Bond Fund |
| Class Name | Institutional Class |
| Trading Symbol | GNYTX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Columbia New York Intermediate Municipal Bond Fund (the Fund) for the period of November 1, 2023 to October 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature 1-800-345-6611. |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-345-6611 |
| Additional Information Website | columbiathreadneedleus.com/resources/literature |
| Expenses [Text Block] | What were the Fund costs for the reporting period? (Based on a hypothetical $10,000 investment) Class Cost of a $10,000 investment Cost paid as a percentage of a $10,000 investment Institutional Class $ 0.49 % |
| Expenses Paid, Amount | $ 51 |
| Expense Ratio, Percent | 0.49% |
| Factors Affecting Performance [Text Block] | Management's Discussion of Fund Performance The performance of Institutional Class shares for the period presented is shown in the Average Annual Total Returns table. Top Performance Contributors Allocations were Security selection Top Performance Detractors Allocations Security selection |
| Performance Past Does Not Indicate Future [Text] | Past performance does not guarantee future performance. |
| Line Graph [Table Text Block] | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns (%) 1 year 5 years 10 years Institutional Class (a) 6.75 0.68 1.74 Bloomberg New York 3-15 Year Blend Municipal Bond Index 7.70 1.10 2.05 Bloomberg Municipal Bond Index 9.70 1.05 2.30 (a) Effective August 1, 2024, the Fund compares its performance to the Bloomberg Municipal Bond Index, a broad-based performance index that meets new regulatory requirements. The Fund’s performance is also compared to its prior benchmark, which more closely represents the market sectors and/or asset classes in which the Fund primarily invests. |
| No Deduction of Taxes [Text Block] | Performance does not reflect the deduction of taxes that a shareholder may pay on fund distributions or on the redemptions of fund shares. |
| Performance Table Market Index Changed [Text Block] | Effective August 1, 2024, the Fund compares its performance to the Bloomberg Municipal Bond Index, a broad-based performance index that meets new regulatory requirements. |
| Prior Market Index Comparison [Text Block] | The Fund’s performance is also compared to its prior benchmark, which more closely represents the market sectors and/or asset classes in which the Fund primarily invests. |
| Material Change Date | Aug. 01, 2024 |
| Updated Performance Information Location [Text Block] | Visit columbiathreadneedleus.com/investment-products/mutual-funds |
| Net Assets | $ 99,422,082 |
| Holdings Count | Holding | 107 |
| Advisory Fees Paid, Amount | $ 515,798 |
| Investment Company, Portfolio Turnover | 13% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 107 Management services fees $ Portfolio turnover for the reporting period 13% |
| Holdings [Text Block] | Graphical Representation of Fund The tables below show the investment makeup of the Fund represented as a percentage Derivatives Bond ratings on Fund holdings are divided into categories ranging from highest to lowest credit quality, determined by using the middle rating of Moody’s Ratings, S&P and Fitch, after dropping the highest and lowest available ratings. When ratings are available from only two rating agencies, the lower rating is used. When a rating is available from only one rating agency, that rating is used. If a security is not rated by Moody's Ratings, S&P or Fitch, but has a rating by Kroll and/or DBRS, the same methodology is applied to those bonds that would otherwise be not rated. When a bond is not rated by any rating agency, it is designated as “Not rated.” Credit quality ratings assigned by a rating agency are subjective opinions, not statements of fact, and are subject to change, including daily. Top Holdings New York State Dormitory Authority 3.7 % Metropolitan Transportation Authority 2.7 % New York City Transitional Finance Authority 2.7 % Port Authority of New York & New Jersey 2.6 % Triborough Bridge & Tunnel Authority 2.3 % Long Island Power Authority 2.2 % City of Yonkers 2.2 % New York State Thruway Authority 2.2 % New York State Dormitory Authority 2.2 % New York State Dormitory Authority 2.1 % Asset Categories Credit Quality |
| Credit Quality Explanation [Text Block] | Bond ratings on Fund holdings are divided into categories ranging from highest to lowest credit quality, determined by using the middle rating of Moody’s Ratings, S&P and Fitch, after dropping the highest and lowest available ratings. When ratings are available from only two rating agencies, the lower rating is used. When a rating is available from only one rating agency, that rating is used. If a security is not rated by Moody's Ratings, S&P or Fitch, but has a rating by Kroll and/or DBRS, the same methodology is applied to those bonds that would otherwise be not rated. When a bond is not rated by any rating agency, it is designated as “Not rated.” Credit quality ratings assigned by a rating agency are subjective opinions, not statements of fact, and are subject to change, including daily. |
| Largest Holdings [Text Block] | Top Holdings New York State Dormitory Authority 3.7 % Metropolitan Transportation Authority 2.7 % New York City Transitional Finance Authority 2.7 % Port Authority of New York & New Jersey 2.6 % Triborough Bridge & Tunnel Authority 2.3 % Long Island Power Authority 2.2 % City of Yonkers 2.2 % New York State Thruway Authority 2.2 % New York State Dormitory Authority 2.2 % New York State Dormitory Authority 2.1 % |
| Material Fund Change [Text Block] | Certain Fund Changes This is a summary of certain changes columbiathreadneedleus.com/resources/literature Effective August 1, 2024, the Fund amended its Prospectus’ Principal Investment Strategies to reflect that the Fund may enter into tender option bond (TOB) transactions and may invest in derivatives, such as floating rate municipal securities (floaters) and inverse floating rate municipal securities (inverse floaters) to add incremental income, futures (including interest rate and Treasury bond futures) to manage duration and hedge against changes in interest rates, and swaps, including Municipal Market Data Rate Locks (MMD Rate Locks) to manage duration and hedge against changes in interest rates. In addition, the Fund amended its Prospectus’ Principal Risks to include disclosure of the risks associated with investing in these instruments and derivatives generally. |
| Material Fund Change Strategies [Text Block] | Effective August 1, 2024, the Fund amended its Prospectus’ Principal Investment Strategies to reflect that the Fund may enter into tender option bond (TOB) transactions and may invest in derivatives, such as floating rate municipal securities (floaters) and inverse floating rate municipal securities (inverse floaters) to add incremental income, futures (including interest rate and Treasury bond futures) to manage duration and hedge against changes in interest rates, and swaps, including Municipal Market Data Rate Locks (MMD Rate Locks) to manage duration and hedge against changes in interest rates. |
| Material Fund Change Risks Change [Text Block] | In addition, the Fund amended its Prospectus’ Principal Risks to include disclosure of the risks associated with investing in these instruments and derivatives generally. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes columbiathreadneedleus.com/resources/literature |
| Updated Prospectus Phone Number | 1-800-345-6611 |
| Updated Prospectus Web Address | columbiathreadneedleus.com/resources/literature |
| Columbia New York Intermediate Municipal Bond Fund - Institutional 2 Class | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia New York Intermediate Municipal Bond Fund |
| Class Name | Institutional 2 Class |
| Trading Symbol | CNYUX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Columbia New York Intermediate Municipal Bond Fund (the Fund) for the period of November 1, 2023 to October 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature 1-800-345-6611. |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-345-6611 |
| Additional Information Website | columbiathreadneedleus.com/resources/literature |
| Expenses [Text Block] | What were the Fund costs for the reporting period? (Based on a hypothetical $10,000 investment) Class Cost of a $10,000 investment Cost paid as a percentage of a $10,000 investment Institutional 2 Class $ 0.45 % |
| Expenses Paid, Amount | $ 47 |
| Expense Ratio, Percent | 0.45% |
| Factors Affecting Performance [Text Block] | Management's Discussion of Fund Performance The performance of Institutional 2 Class shares for the period presented is shown in the Average Annual Total Returns table. Top Performance Contributors Allocations Security selection Top Performance Detractors Allocations Security selection pre |
| Performance Past Does Not Indicate Future [Text] | Past performance does not guarantee future performance. |
| Line Graph [Table Text Block] | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns (%) 1 year 5 years 10 years Institutional 2 Class (a),(b) 6.79 0.74 1.79 Bloomberg New York 3-15 Year Blend Municipal Bond Index 7.70 1.10 2.05 Bloomberg Municipal Bond Index 9.70 1.05 2.30 (a) The returns shown for periods prior to March 1, 2016 (including returns for the Life of the Fund, if shown, which are since Fund inception) include the returns of Institutional Class. These returns are adjusted to reflect any higher class-related operating expenses of the newer share classes, as applicable. Please visit columbiathreadneedleus.com/investor/investment-products/mutual-funds/appended-performance (b) Effective August 1, 2024, the Fund compares its performance to the Bloomberg Municipal Bond Index, a broad-based performance index that meets new regulatory requirements. The Fund’s performance is also compared to its prior benchmark, which more closely represents the market sectors and/or asset classes in which the Fund primarily invests. |
| No Deduction of Taxes [Text Block] | Performance does not reflect the deduction of taxes that a shareholder may pay on fund distributions or on the redemptions of fund shares. |
| Performance Table Market Index Changed [Text Block] | Effective August 1, 2024, the Fund compares its performance to the Bloomberg Municipal Bond Index, a broad-based performance index that meets new regulatory requirements. |
| Prior Market Index Comparison [Text Block] | The Fund’s performance is also compared to its prior benchmark, which more closely represents the market sectors and/or asset classes in which the Fund primarily invests. |
| Material Change Date | Aug. 01, 2024 |
| Updated Performance Information Location [Text Block] | Visit columbiathreadneedleus.com/investment-products/mutual-funds |
| Net Assets | $ 99,422,082 |
| Holdings Count | Holding | 107 |
| Advisory Fees Paid, Amount | $ 515,798 |
| Investment Company, Portfolio Turnover | 13% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 107 Management services fees $ Portfolio turnover for the reporting period 13% |
| Holdings [Text Block] | Graphical Representation of Fund The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change. Bond ratings on Fund holdings are divided into categories ranging from highest to lowest credit quality, determined by using the middle rating of Moody’s Ratings, S&P and Fitch, after dropping the highest and lowest available ratings. When ratings are available from only two rating agencies, the lower rating is used. When a rating is available from only one rating agency, that rating is used. If a security is not rated by Moody's Ratings, S&P or Fitch, but has a rating by Kroll and/or DBRS, the same methodology is applied to those bonds that would otherwise be not rated. When a bond is not rated by any rating agency, it is designated as “Not rated.” Credit quality ratings assigned by a rating agency are subjective opinions, not statements of fact, and are subject to change, including daily. Top Holdings New York State Dormitory Authority 3.7 % Metropolitan Transportation Authority 2.7 % New York City Transitional Finance Authority 2.7 % Port Authority of New York & New Jersey 2.6 % Triborough Bridge & Tunnel Authority 2.3 % Long Island Power Authority 2.2 % City of Yonkers 2.2 % New York State Thruway Authority 2.2 % New York State Dormitory Authority 2.2 % New York State Dormitory Authority 2.1 % Asset Categories Credit Quality |
| Credit Quality Explanation [Text Block] | Bond ratings on Fund holdings are divided into categories ranging from highest to lowest credit quality, determined by using the middle rating of Moody’s Ratings, S&P and Fitch, after dropping the highest and lowest available ratings. When ratings are available from only two rating agencies, the lower rating is used. When a rating is available from only one rating agency, that rating is used. If a security is not rated by Moody's Ratings, S&P or Fitch, but has a rating by Kroll and/or DBRS, the same methodology is applied to those bonds that would otherwise be not rated. When a bond is not rated by any rating agency, it is designated as “Not rated.” Credit quality ratings assigned by a rating agency are subjective opinions, not statements of fact, and are subject to change, including daily. |
| Largest Holdings [Text Block] | Top Holdings New York State Dormitory Authority 3.7 % Metropolitan Transportation Authority 2.7 % New York City Transitional Finance Authority 2.7 % Port Authority of New York & New Jersey 2.6 % Triborough Bridge & Tunnel Authority 2.3 % Long Island Power Authority 2.2 % City of Yonkers 2.2 % New York State Thruway Authority 2.2 % New York State Dormitory Authority 2.2 % New York State Dormitory Authority 2.1 % |
| Material Fund Change [Text Block] | Certain Fund Changes This is a summary of certain changes to the Fund during the reporting period. For more complete information, you may review the Fund’s prospectus, which is available at columbiathreadneedleus.com/resources/literature Effective August 1, 2024, the Fund amended its Prospectus’ Principal Investment Strategies to reflect that the Fund may enter into tender option bond (TOB) transactions and may invest in derivatives, such as floating rate municipal securities (floaters) and inverse floating rate municipal securities (inverse floaters) to add incremental income, futures (including interest rate and Treasury bond futures) to manage duration and hedge against changes in interest rates, and swaps, including Municipal Market Data Rate Locks (MMD Rate Locks) to manage duration and hedge against changes in interest rates. In addition, the Fund amended its Prospectus’ Principal Risks to include disclosure of the risks associated with investing in these instruments and derivatives generally. |
| Material Fund Change Strategies [Text Block] | Effective August 1, 2024, the Fund amended its Prospectus’ Principal Investment Strategies to reflect that the Fund may enter into tender option bond (TOB) transactions and may invest in derivatives, such as floating rate municipal securities (floaters) and inverse floating rate municipal securities (inverse floaters) to add incremental income, futures (including interest rate and Treasury bond futures) to manage duration and hedge against changes in interest rates, and swaps, including Municipal Market Data Rate Locks (MMD Rate Locks) to manage duration and hedge against changes in interest rates. |
| Material Fund Change Risks Change [Text Block] | In addition, the Fund amended its Prospectus’ Principal Risks to include disclosure of the risks associated with investing in these instruments and derivatives generally. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund during the reporting period. For more complete information, you may review the Fund’s prospectus, which is available at columbiathreadneedleus.com/resources/literature |
| Updated Prospectus Phone Number | 1-800-345-6611 |
| Updated Prospectus Web Address | columbiathreadneedleus.com/resources/literature |
| Columbia New York Intermediate Municipal Bond Fund - Institutional 3 Class | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia New York Intermediate Municipal Bond Fund |
| Class Name | Institutional 3 Class |
| Trading Symbol | CNYYX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Columbia New York Intermediate Municipal Bond Fund (the Fund) for the period of November 1, 2023 to October 31, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature 1-800-345-6611. |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-345-6611 |
| Additional Information Website | columbiathreadneedleus.com/resources/literature |
| Expenses [Text Block] | What were the Fund costs for the reporting period? (Based on a hypothetical $10,000 investment) Class Cost of a $10,000 investment Cost paid as a percentage of a $10,000 investment Institutional 3 Class $ 0.40 % |
| Expenses Paid, Amount | $ 41 |
| Expense Ratio, Percent | 0.40% |
| Factors Affecting Performance [Text Block] | Management's Discussion of Fund Performance The performance of Institutional 3 Class shares for the period presented is shown in the Average Annual Total Returns table. Top Performance Contributors Allocations Security selection Top Performance Detractors Allocations Security selection |
| Performance Past Does Not Indicate Future [Text] | Past performance does not guarantee future performance. |
| Line Graph [Table Text Block] | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns (%) 1 year 5 years 10 years Institutional 3 Class (a),(b) 6.84 0.78 1.81 Bloomberg New York 3-15 Year Blend Municipal Bond Index 7.70 1.10 2.05 Bloomberg Municipal Bond Index 9.70 1.05 2.30 (a) The returns shown for periods prior to March 1, 2017 (including returns for the Life of the Fund, if shown, which are since Fund inception) include the returns of Institutional Class. These returns are adjusted to reflect any higher class-related operating expenses of the newer share classes, as applicable. Please visit columbiathreadneedleus.com/investor/investment-products/mutual-funds/appended-performance (b) Effective August 1, 2024, the Fund compares its performance to the Bloomberg Municipal Bond Index, a broad-based performance index that meets new regulatory requirements. The Fund’s performance is also compared to its prior benchmark, which more closely represents the market sectors and/or asset classes in which the Fund primarily invests. |
| No Deduction of Taxes [Text Block] | Performance does not reflect the deduction of taxes that a shareholder may pay on fund distributions or on the redemptions of fund shares. |
| Performance Table Market Index Changed [Text Block] | Effective August 1, 2024, the Fund compares its performance to the Bloomberg Municipal Bond Index, a broad-based performance index that meets new regulatory requirements. |
| Prior Market Index Comparison [Text Block] | The Fund’s performance is also compared to its prior benchmark, which more closely represents the market sectors and/or asset classes in which the Fund primarily invests. |
| Material Change Date | Aug. 01, 2024 |
| Updated Performance Information Location [Text Block] | Visit columbiathreadneedleus.com/investment-products/mutual-funds |
| Net Assets | $ 99,422,082 |
| Holdings Count | Holding | 107 |
| Advisory Fees Paid, Amount | $ 515,798 |
| Investment Company, Portfolio Turnover | 13% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 107 Management services fees $ Portfolio turnover for the reporting period 13% |
| Holdings [Text Block] | Graphical Representation of Fund Holdings The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change. Bond ratings on Fund holdings are divided into categories ranging from highest to lowest credit quality, determined by using the middle rating of Moody’s Ratings, S&P and Fitch, after dropping the highest and lowest available ratings. When ratings are available from only two rating agencies, the lower rating is used. When a rating is available from only one rating agency, that rating is used. If a security is not rated by Moody's Ratings, S&P or Fitch, but has a rating by Kroll and/or DBRS, the same methodology is applied to those bonds that would otherwise be not rated. When a bond is not rated by any rating agency, it is designated as “Not rated.” Credit quality ratings assigned by a rating agency are subjective opinions, not statements of fact, and are subject to change, including daily. Top Holdings New York State Dormitory Authority 3.7 % Metropolitan Transportation Authority 2.7 % New York City Transitional Finance Authority 2.7 % Port Authority of New York & New Jersey 2.6 % Triborough Bridge & Tunnel Authority 2.3 % Long Island Power Authority 2.2 % City of Yonkers 2.2 % New York State Thruway Authority 2.2 % New York State Dormitory Authority 2.2 % New York State Dormitory Authority 2.1 % Asset Categories Credit Quality |
| Credit Quality Explanation [Text Block] | Bond ratings on Fund holdings are divided into categories ranging from highest to lowest credit quality, determined by using the middle rating of Moody’s Ratings, S&P and Fitch, after dropping the highest and lowest available ratings. When ratings are available from only two rating agencies, the lower rating is used. When a rating is available from only one rating agency, that rating is used. If a security is not rated by Moody's Ratings, S&P or Fitch, but has a rating by Kroll and/or DBRS, the same methodology is applied to those bonds that would otherwise be not rated. When a bond is not rated by any rating agency, it is designated as “Not rated.” Credit quality ratings assigned by a rating agency are subjective opinions, not statements of fact, and are subject to change, including daily. |
| Largest Holdings [Text Block] | Top Holdings New York State Dormitory Authority 3.7 % Metropolitan Transportation Authority 2.7 % New York City Transitional Finance Authority 2.7 % Port Authority of New York & New Jersey 2.6 % Triborough Bridge & Tunnel Authority 2.3 % Long Island Power Authority 2.2 % City of Yonkers 2.2 % New York State Thruway Authority 2.2 % New York State Dormitory Authority 2.2 % New York State Dormitory Authority 2.1 % |
| Material Fund Change [Text Block] | Certain Fund Changes This is a summary of certain changes to the Fund during the reporting period. For more complete information, you may review the Fund’s prospectus, which is available at columbiathreadneedleus.com/resources/literature Effective August 1, 2024, the Fund amended its Prospectus’ Principal Investment Strategies to reflect that the Fund may enter into tender option bond (TOB) transactions and may invest in derivatives, such as floating rate municipal securities (floaters) and inverse floating rate municipal securities (inverse floaters) to add incremental income, futures (including interest rate and Treasury bond futures) to manage duration and hedge against changes in interest rates, and swaps, including Municipal Market Data Rate Locks (MMD Rate Locks) to manage duration and hedge against changes in interest rates. In addition, the Fund amended its Prospectus’ Principal Risks to include disclosure of the risks associated with investing in these instruments and derivatives generally. |
| Material Fund Change Strategies [Text Block] | Effective August 1, 2024, the Fund amended its Prospectus’ Principal Investment Strategies to reflect that the Fund may enter into tender option bond (TOB) transactions and may invest in derivatives, such as floating rate municipal securities (floaters) and inverse floating rate municipal securities (inverse floaters) to add incremental income, futures (including interest rate and Treasury bond futures) to manage duration and hedge against changes in interest rates, and swaps, including Municipal Market Data Rate Locks (MMD Rate Locks) to manage duration and hedge against changes in interest rates. |
| Material Fund Change Risks Change [Text Block] | In addition, the Fund amended its Prospectus’ Principal Risks to include disclosure of the risks associated with investing in these instruments and derivatives generally. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund during the reporting period. For more complete information, you may review the Fund’s prospectus, which is available at columbiathreadneedleus.com/resources/literature |
| Updated Prospectus Phone Number | 1-800-345-6611 |
| Updated Prospectus Web Address | columbiathreadneedleus.com/resources/literature |
