| Shareholder Report | 12 Months Ended |
| Jul. 31, 2024 USD ($) Holding |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | Columbia Funds Series Trust II |
| Entity Central Index Key | 0001352280 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jul. 31, 2024 |
| Columbia Income Opportunities Fund - Class A | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Income Opportunities Fund |
| Class Name | Class A |
| Trading Symbol | AIOAX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Columbia Income Opportunities Fund (the Fund) for the period of August 1, 2023 to July 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. |
| 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 $ 0.96 % |
| Expenses Paid, Amount | $ 101 |
| Expense Ratio, Percent | 0.96% |
| 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 Security allocation Credit Maturity Top Performance Detractors Industry allocation Credit Maturity |
| 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) 9.54 2.99 3.69 Class A (including sales charges) (a) 4.34 1.99 3.19 ICE BofA BB-B US Cash Pay High Yield Constrained Index 10.47 3.87 4.53 Bloomberg U.S. Aggregate Bond Index 5.10 0.19 1.61 (a) Effective August 1, 2024, the Fund compares its performance to the Bloomberg U.S. Aggregate 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. |
| Updated Performance Information Location [Text Block] | Visit columbiathreadneedleus.com/investment-products/mutual-funds |
| Net Assets | $ 766,312,484 |
| Holdings Count | Holding | 381 |
| Advisory Fees Paid, Amount | $ 4,714,981 |
| Investment Company, Portfolio Turnover | 41% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 381 Management services fees $ Portfolio turnover for the reporting period 41% |
| 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 average rating of Moody’s, S&P and Fitch. When ratings are available from only two rating agencies, the average of the two ratings is used. When a rating is available from only one rating agency, that rating is used. 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 Alliant Holdings Intermediate LLC/Co-Issuer 0.9 % IRB Holding Corp. 0.9 % Tenet Healthcare Corp. 0.9 % Clearway Energy Operating LLC 0.8 % HUB International, Ltd. 0.8 % Clear Channel Worldwide Holdings, Inc. 0.8 % NextEra Energy Partners LP 0.8 % Colgate Energy Partners III LLC 0.8 % Picard Midco, Inc. 0.7 % Rocket Mortgage LLC/Co-Issuer, Inc. 0.7 % 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 average rating of Moody’s, S&P and Fitch. When ratings are available from only two rating agencies, the average of the two ratings is used. When a rating is available from only one rating agency, that rating is used. 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 Alliant Holdings Intermediate LLC/Co-Issuer 0.9 % IRB Holding Corp. 0.9 % Tenet Healthcare Corp. 0.9 % Clearway Energy Operating LLC 0.8 % HUB International, Ltd. 0.8 % Clear Channel Worldwide Holdings, Inc. 0.8 % NextEra Energy Partners LP 0.8 % Colgate Energy Partners III LLC 0.8 % Picard Midco, Inc. 0.7 % Rocket Mortgage LLC/Co-Issuer, Inc. 0.7 % |
| Columbia Income Opportunities Fund - Advisor Class | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Income Opportunities Fund |
| Class Name | Advisor Class |
| Trading Symbol | CPPRX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Columbia Income Opportunities Fund (the Fund) for the period of August 1, 2023 to July 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. |
| 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 $ 0.71 % |
| Expenses Paid, Amount | $ 74 |
| Expense Ratio, Percent | 0.71% |
| 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 Security allocation Credit Maturity Top Performance Detractors Industry allocation Credit Maturity |
| 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) 9.79 3.23 3.95 ICE BofA BB-B US Cash Pay High Yield Constrained Index 10.47 3.87 4.53 Bloomberg U.S. Aggregate Bond Index 5.10 0.19 1.61 (a) Effective August 1, 2024, the Fund compares its performance to the Bloomberg U.S. Aggregate 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. |
| Updated Performance Information Location [Text Block] | Visit columbiathreadneedleus.com/investment-products/mutual-funds |
| Net Assets | $ 766,312,484 |
| Holdings Count | Holding | 381 |
| Advisory Fees Paid, Amount | $ 4,714,981 |
| Investment Company, Portfolio Turnover | 41% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 381 Management services fees $ Portfolio turnover for the reporting period 41% |
| 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 average rating of Moody’s, S&P and Fitch. When ratings are available from only two rating agencies, the average of the two ratings is used. When a rating is available from only one rating agency, that rating is used. 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 Alliant Holdings Intermediate LLC/Co-Issuer 0.9 % IRB Holding Corp. 0.9 % Tenet Healthcare Corp. 0.9 % Clearway Energy Operating LLC 0.8 % HUB International, Ltd. 0.8 % Clear Channel Worldwide Holdings, Inc. 0.8 % NextEra Energy Partners LP 0.8 % Colgate Energy Partners III LLC 0.8 % Picard Midco, Inc. 0.7 % Rocket Mortgage LLC/Co-Issuer, Inc. 0.7 % 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 average rating of Moody’s, S&P and Fitch. When ratings are available from only two rating agencies, the average of the two ratings is used. When a rating is available from only one rating agency, that rating is used. 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 Alliant Holdings Intermediate LLC/Co-Issuer 0.9 % IRB Holding Corp. 0.9 % Tenet Healthcare Corp. 0.9 % Clearway Energy Operating LLC 0.8 % HUB International, Ltd. 0.8 % Clear Channel Worldwide Holdings, Inc. 0.8 % NextEra Energy Partners LP 0.8 % Colgate Energy Partners III LLC 0.8 % Picard Midco, Inc. 0.7 % Rocket Mortgage LLC/Co-Issuer, Inc. 0.7 % |
| Columbia Income Opportunities Fund - Class C | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Income Opportunities Fund |
| Class Name | Class C |
| Trading Symbol | RIOCX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Columbia Income Opportunities Fund (the Fund) for the period of August 1, 2023 to July 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. |
| 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 C $ 1.71 % |
| Expenses Paid, Amount | $ 178 |
| Expense Ratio, Percent | 1.71% |
| Factors Affecting Performance [Text Block] | Management's Discussion of Fund Performance The performance of Class C shares for the period presented is shown in the Average Annual Total Returns table. Top Performance Contributors Security allocation Credit Maturity Top Performance Detractors Industry allocation Credit Maturity |
| 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 C (excluding sales charges) (a) 8.73 2.21 2.92 Class C (including sales charges) (a) 7.73 2.21 2.92 ICE BofA BB-B US Cash Pay High Yield Constrained Index 10.47 3.87 4.53 Bloomberg U.S. Aggregate Bond Index 5.10 0.19 1.61 (a) Effective August 1, 2024, the Fund compares its performance to the Bloomberg U.S. Aggregate 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. |
| Updated Performance Information Location [Text Block] | Visit columbiathreadneedleus.com/investment-products/mutual-funds |
| Net Assets | $ 766,312,484 |
| Holdings Count | Holding | 381 |
| Advisory Fees Paid, Amount | $ 4,714,981 |
| Investment Company, Portfolio Turnover | 41% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 381 Management services fees $ Portfolio turnover for the reporting period 41% |
| 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 average rating of Moody’s, S&P and Fitch. When ratings are available from only two rating agencies, the average of the two ratings is used. When a rating is available from only one rating agency, that rating is used. 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 Alliant Holdings Intermediate LLC/Co-Issuer 0.9 % IRB Holding Corp. 0.9 % Tenet Healthcare Corp. 0.9 % Clearway Energy Operating LLC 0.8 % HUB International, Ltd. 0.8 % Clear Channel Worldwide Holdings, Inc. 0.8 % NextEra Energy Partners LP 0.8 % Colgate Energy Partners III LLC 0.8 % Picard Midco, Inc. 0.7 % Rocket Mortgage LLC/Co-Issuer, Inc. 0.7 % 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 average rating of Moody’s, S&P and Fitch. When ratings are available from only two rating agencies, the average of the two ratings is used. When a rating is available from only one rating agency, that rating is used. 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 Alliant Holdings Intermediate LLC/Co-Issuer 0.9 % IRB Holding Corp. 0.9 % Tenet Healthcare Corp. 0.9 % Clearway Energy Operating LLC 0.8 % HUB International, Ltd. 0.8 % Clear Channel Worldwide Holdings, Inc. 0.8 % NextEra Energy Partners LP 0.8 % Colgate Energy Partners III LLC 0.8 % Picard Midco, Inc. 0.7 % Rocket Mortgage LLC/Co-Issuer, Inc. 0.7 % |
| Columbia Income Opportunities Fund - Institutional Class | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Income Opportunities Fund |
| Class Name | Institutional Class |
| Trading Symbol | CIOZX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Columbia Income Opportunities Fund (the Fund) for the period of August 1, 2023 to July 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. |
| 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 $ 0.71 % |
| Expenses Paid, Amount | $ 74 |
| Expense Ratio, Percent | 0.71% |
| 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 Security allocation Credit Maturity Top Performance Detractors Industry allocation Credit Maturity |
| 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) 9.80 3.25 3.96 ICE BofA BB-B US Cash Pay High Yield Constrained Index 10.47 3.87 4.53 Bloomberg U.S. Aggregate Bond Index 5.10 0.19 1.61 (a) Effective August 1, 2024, the Fund compares its performance to the Bloomberg U.S. Aggregate 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. |
| Updated Performance Information Location [Text Block] | Visit columbiathreadneedleus.com/investment-products/mutual-funds |
| Net Assets | $ 766,312,484 |
| Holdings Count | Holding | 381 |
| Advisory Fees Paid, Amount | $ 4,714,981 |
| Investment Company, Portfolio Turnover | 41% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 381 Management services fees $ Portfolio turnover for the reporting period 41% |
| 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 average rating of Moody’s, S&P and Fitch. When ratings are available from only two rating agencies, the average of the two ratings is used. When a rating is available from only one rating agency, that rating is used. 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 Alliant Holdings Intermediate LLC/Co-Issuer 0.9 % IRB Holding Corp. 0.9 % Tenet Healthcare Corp. 0.9 % Clearway Energy Operating LLC 0.8 % HUB International, Ltd. 0.8 % Clear Channel Worldwide Holdings, Inc. 0.8 % NextEra Energy Partners LP 0.8 % Colgate Energy Partners III LLC 0.8 % Picard Midco, Inc. 0.7 % Rocket Mortgage LLC/Co-Issuer, Inc. 0.7 % 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 average rating of Moody’s, S&P and Fitch. When ratings are available from only two rating agencies, the average of the two ratings is used. When a rating is available from only one rating agency, that rating is used. 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 Alliant Holdings Intermediate LLC/Co-Issuer 0.9 % IRB Holding Corp. 0.9 % Tenet Healthcare Corp. 0.9 % Clearway Energy Operating LLC 0.8 % HUB International, Ltd. 0.8 % Clear Channel Worldwide Holdings, Inc. 0.8 % NextEra Energy Partners LP 0.8 % Colgate Energy Partners III LLC 0.8 % Picard Midco, Inc. 0.7 % Rocket Mortgage LLC/Co-Issuer, Inc. 0.7 % |
| Columbia Income Opportunities Fund - Institutional 2 Class | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Income Opportunities Fund |
| Class Name | Institutional 2 Class |
| Trading Symbol | CEPRX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Columbia Income Opportunities Fund (the Fund) for the period of August 1, 2023 to July 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. |
| 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 $ 0.64 % |
| Expenses Paid, Amount | $ 67 |
| Expense Ratio, Percent | 0.64% |
| 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 Security allocation Credit Maturity Top Performance Detractors Industry allocation Credit Maturity |
| 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) 9.88 3.31 4.04 ICE BofA BB-B US Cash Pay High Yield Constrained Index 10.47 3.87 4.53 Bloomberg U.S. Aggregate Bond Index 5.10 0.19 1.61 (a) Effective August 1, 2024, the Fund compares its performance to the Bloomberg U.S. Aggregate 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. |
| Updated Performance Information Location [Text Block] | Visit columbiathreadneedleus.com/investment-products/mutual-funds |
| Net Assets | $ 766,312,484 |
| Holdings Count | Holding | 381 |
| Advisory Fees Paid, Amount | $ 4,714,981 |
| Investment Company, Portfolio Turnover | 41% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 381 Management services fees $ Portfolio turnover for the reporting period 41% |
| 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 average rating of Moody’s, S&P and Fitch. When ratings are available from only two rating agencies, the average of the two ratings is used. When a rating is available from only one rating agency, that rating is used. 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 Alliant Holdings Intermediate LLC/Co-Issuer 0.9 % IRB Holding Corp. 0.9 % Tenet Healthcare Corp. 0.9 % Clearway Energy Operating LLC 0.8 % HUB International, Ltd. 0.8 % Clear Channel Worldwide Holdings, Inc. 0.8 % NextEra Energy Partners LP 0.8 % Colgate Energy Partners III LLC 0.8 % Picard Midco, Inc. 0.7 % Rocket Mortgage LLC/Co-Issuer, Inc. 0.7 % 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 average rating of Moody’s, S&P and Fitch. When ratings are available from only two rating agencies, the average of the two ratings is used. When a rating is available from only one rating agency, that rating is used. 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 Alliant Holdings Intermediate LLC/Co-Issuer 0.9 % IRB Holding Corp. 0.9 % Tenet Healthcare Corp. 0.9 % Clearway Energy Operating LLC 0.8 % HUB International, Ltd. 0.8 % Clear Channel Worldwide Holdings, Inc. 0.8 % NextEra Energy Partners LP 0.8 % Colgate Energy Partners III LLC 0.8 % Picard Midco, Inc. 0.7 % Rocket Mortgage LLC/Co-Issuer, Inc. 0.7 % |
| Columbia Income Opportunities Fund - Institutional 3 Class | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Income Opportunities Fund |
| Class Name | Institutional 3 Class |
| Trading Symbol | CIOYX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Columbia Income Opportunities Fund (the Fund) for the period of August 1, 2023 to July 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. |
| 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 $ 0.59 % |
| Expenses Paid, Amount | $ 62 |
| Expense Ratio, Percent | 0.59% |
| 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 Security allocation Credit Maturity Top Performance Detractors Industry allocation Credit Maturity |
| 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) 9.94 3.36 4.10 ICE BofA BB-B US Cash Pay High Yield Constrained Index 10.47 3.87 4.53 Bloomberg U.S. Aggregate Bond Index 5.10 0.19 1.61 (a) Effective August 1, 2024, the Fund compares its performance to the Bloomberg U.S. Aggregate 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. |
| Updated Performance Information Location [Text Block] | Visit columbiathreadneedleus.com/investment-products/mutual-funds |
| Net Assets | $ 766,312,484 |
| Holdings Count | Holding | 381 |
| Advisory Fees Paid, Amount | $ 4,714,981 |
| Investment Company, Portfolio Turnover | 41% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 381 Management services fees $ Portfolio turnover for the reporting period 41% |
| 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 average rating of Moody’s, S&P and Fitch. When ratings are available from only two rating agencies, the average of the two ratings is used. When a rating is available from only one rating agency, that rating is used. 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 Alliant Holdings Intermediate LLC/Co-Issuer 0.9 % IRB Holding Corp. 0.9 % Tenet Healthcare Corp. 0.9 % Clearway Energy Operating LLC 0.8 % HUB International, Ltd. 0.8 % Clear Channel Worldwide Holdings, Inc. 0.8 % NextEra Energy Partners LP 0.8 % Colgate Energy Partners III LLC 0.8 % Picard Midco, Inc. 0.7 % Rocket Mortgage LLC/Co-Issuer, Inc. 0.7 % 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 average rating of Moody’s, S&P and Fitch. When ratings are available from only two rating agencies, the average of the two ratings is used. When a rating is available from only one rating agency, that rating is used. 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 Alliant Holdings Intermediate LLC/Co-Issuer 0.9 % IRB Holding Corp. 0.9 % Tenet Healthcare Corp. 0.9 % Clearway Energy Operating LLC 0.8 % HUB International, Ltd. 0.8 % Clear Channel Worldwide Holdings, Inc. 0.8 % NextEra Energy Partners LP 0.8 % Colgate Energy Partners III LLC 0.8 % Picard Midco, Inc. 0.7 % Rocket Mortgage LLC/Co-Issuer, Inc. 0.7 % |
