| Form N-CSR Cover | 12 Months Ended |
| Aug. 31, 2024 | |
| 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 | Aug. 31, 2024 |
| Shareholder Report | 12 Months Ended |
| Aug. 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 | Aug. 31, 2024 |
| Columbia Contrarian Core Fund - Class A | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Contrarian Core Fund |
| Class Name | Class A |
| Trading Symbol | LCCAX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Columbia Contrarian Core Fund (the Fund) for the period of September 1, 2023 to August 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 $ 0.97 % |
| Expenses Paid, Amount | $ 110 |
| Expense Ratio, Percent | 0.97% |
| 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 Stock selection Allocations Individual holdings Top Performance Detractors Stock selection Allocations Individual holdings |
| 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) 27.42 16.40 12.46 Class A (including sales charges) 20.10 15.03 11.80 Russell ® 26.60 15.55 12.66 |
| 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 information |
| Net Assets | $ 14,614,092,430 |
| Holdings Count | Holding | 79 |
| Advisory Fees Paid, Amount | $ 78,501,488 |
| Investment Company, Portfolio Turnover | 51% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 79 Management services fees $ Portfolio turnover for the reporting period 51% |
| 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. Top Holdings Microsoft Corp. 6.9 % Apple, Inc. 6.7 % NVIDIA Corp 6.5 % Amazon.com, Inc. 4.4 % Meta Platforms, Inc., Class A 2.8 % Alphabet, Inc., Class A 2.0 % JPMorgan Chase & Co. 1.9 % Alphabet, Inc., Class C 1.9 % Elevance Health, Inc. 1.8 % AbbVie, Inc. 1.7 % Asset Categories Equity Sector Allocation |
| Largest Holdings [Text Block] | Top Holdings Microsoft Corp. 6.9 % Apple, Inc. 6.7 % NVIDIA Corp 6.5 % Amazon.com, Inc. 4.4 % Meta Platforms, Inc., Class A 2.8 % Alphabet, Inc., Class A 2.0 % JPMorgan Chase & Co. 1.9 % Alphabet, Inc., Class C 1.9 % Elevance Health, Inc. 1.8 % AbbVie, Inc. 1.7 % |
| Updated Prospectus Web Address | columbiathreadneedleus.com/investment-products/mutual-funds |
| Columbia Contrarian Core Fund - Advisor Class | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Contrarian Core Fund |
| Class Name | Advisor Class |
| Trading Symbol | CORRX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Columbia Contrarian Core Fund (the Fund) for the period of September 1, 2023 to August 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 $ 0.72 % |
| Expenses Paid, Amount | $ 82 |
| Expense Ratio, Percent | 0.72% |
| 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 Stock selection Allocations Individual holdings Top Performance Detractors Stock selection Allocations Individual holdings |
| 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 27.75 16.69 12.74 Russell ® 26.60 15.55 12.66 |
| 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 | $ 14,614,092,430 |
| Holdings Count | Holding | 79 |
| Advisory Fees Paid, Amount | $ 78,501,488 |
| Investment Company, Portfolio Turnover | 51% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio 79 Management services fees $ Portfolio turnover for the reporting period 51% |
| 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. Top Holdings Microsoft Corp. 6.9 % Apple, Inc. 6.7 % NVIDIA Corp. 6.5 % Amazon.com, Inc. 4.4 % Meta Platforms, Inc., Class A 2.8 % Alphabet, Inc., Class A 2.0 % JPMorgan Chase & Co. 1.9 % Alphabet, Inc., Class C 1.9 % Elevance Health, Inc. 1.8 % AbbVie 1.7 % Asset Categories Equity Sector Allocation |
| Largest Holdings [Text Block] | Top Holdings Microsoft Corp. 6.9 % Apple, Inc. 6.7 % NVIDIA Corp. 6.5 % Amazon.com, Inc. 4.4 % Meta Platforms, Inc., Class A 2.8 % Alphabet, Inc., Class A 2.0 % JPMorgan Chase & Co. 1.9 % Alphabet, Inc., Class C 1.9 % Elevance Health, Inc. 1.8 % AbbVie 1.7 % |
| Updated Prospectus Web Address | columbiathreadneedleus.com/investment-products/mutual-funds |
| Columbia Contrarian Core Fund - Class C | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Contrarian Core Fund |
| Class Name | Class C |
| Trading Symbol | LCCCX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Columbia Contrarian Core Fund (the Fund) for the period of September 1, 2023 to August 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 $ 1.72 % |
| Expenses Paid, Amount | $ 194 |
| Expense Ratio, Percent | 1.72% |
| 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 Stock selection Allocations Individual holdings Top Performance Detractors Stock selection Allocations Individual holdings |
| 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) 26.45 15.52 11.61 Class C (including sales charges) 25.45 15.52 11.61 Russell ® 26.60 15.55 12.66 |
| 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 | $ 14,614,092,430 |
| Holdings Count | Holding | 79 |
| Advisory Fees Paid, Amount | $ 78,501,488 |
| Investment Company, Portfolio Turnover | 51% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 79 Management services fees $ Portfolio turnover for the reporting period 51% |
| Holdings [Text Block] | Graphical Representation of Fund The tables below show the investment makeup of the Fund Top Holdings Microsoft Corp. 6.9 % Apple, Inc. 6.7 % NVIDIA Corp. 6.5 % Amazon.com, Inc. 4.4 % Meta Platforms, Inc., Class A 2.8 % Alphabet, Inc., Class A 2.0 % JPMorgan Chase & Co. 1.9 % Alphabet, Inc., Class C 1.9 % Elevance Health, Inc. 1.8 % AbbVie, Inc. 1.7 % Asset Categories Equity Sector Allocation |
| Largest Holdings [Text Block] | Top Holdings Microsoft Corp. 6.9 % Apple, Inc. 6.7 % NVIDIA Corp. 6.5 % Amazon.com, Inc. 4.4 % Meta Platforms, Inc., Class A 2.8 % Alphabet, Inc., Class A 2.0 % JPMorgan Chase & Co. 1.9 % Alphabet, Inc., Class C 1.9 % Elevance Health, Inc. 1.8 % AbbVie, Inc. 1.7 % |
| Updated Prospectus Web Address | columbiathreadneedleus.com/investment-products/mutual-funds |
| Columbia Contrarian Core Fund - Institutional Class | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Contrarian Core Fund |
| Class Name | Institutional Class |
| Trading Symbol | SMGIX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Columbia Contrarian Core Fund (the Fund) for the period of September 1, 2023 to August 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 $ 0.72 % |
| Expenses Paid, Amount | $ 82 |
| Expense Ratio, Percent | 0.72% |
| 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 Stock selection Allocations Individual holdings Top Performance Detractors Stock selection Allocations Individual holdings |
| 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 27.72 16.69 12.74 Russell ® 26.60 15.55 12.66 |
| 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 | $ 14,614,092,430 |
| Holdings Count | Holding | 79 |
| Advisory Fees Paid, Amount | $ 78,501,488 |
| Investment Company, Portfolio Turnover | 51% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 79 Management services fees $ Portfolio turnover for the reporting period 51% |
| 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. Top Holdings Microsoft Corp. 6.9 % Apple, Inc. 6.7 % NVIDIA Corp. 6.5 % Amazon.com, Inc. 4.4 % Meta Platforms, Inc., Class A 2.8 % Alphabet, Inc., Class A 2.0 % JPMorgan Chase & Co. 1.9 % Alphabet, Inc., Class 1.9 % Elevance Health, Inc. 1.8 % AbbVie, Inc. 1.7 % Asset Categories Equity Sector Allocation |
| Largest Holdings [Text Block] | Top Holdings Microsoft Corp. 6.9 % Apple, Inc. 6.7 % NVIDIA Corp. 6.5 % Amazon.com, Inc. 4.4 % Meta Platforms, Inc., Class A 2.8 % Alphabet, Inc., Class A 2.0 % JPMorgan Chase & Co. 1.9 % Alphabet, Inc., Class 1.9 % Elevance Health, Inc. 1.8 % AbbVie, Inc. 1.7 % |
| Updated Prospectus Web Address | columbiathreadneedleus.com/investment-products/mutual-funds |
| Columbia Contrarian Core Fund - Institutional 2 Class | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Contrarian Core Fund |
| Class Name | Institutional 2 Class |
| Trading Symbol | COFRX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Columbia Contrarian Core Fund (the Fund) for the period of September 1, 2023 to August 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 $ 0.65 % |
| Expenses Paid, Amount | $ 74 |
| Expense Ratio, Percent | 0.65% |
| 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 Stock selection Allocations Individual holdings Top Performance Detractors Stock selection Allocations Individual holdings |
| 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 27.81 16.78 12.84 Russell ® 26.60 15.55 12.66 |
| 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 | $ 14,614,092,430 |
| Holdings Count | Holding | 79 |
| Advisory Fees Paid, Amount | $ 78,501,488 |
| Investment Company, Portfolio Turnover | 51% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number 79 Management services fees $ Portfolio turnover for the reporting period 51% |
| 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. Top Holdings Microsoft Corp. 6.9 % Apple, Inc. 6.7 % NVIDIA Corp. 6.5 % Amazon.com, Inc. 4.4 % Meta Platforms, Inc., Class A 2.8 % Alphabet, Inc., Class A 2.0 % JPMorgan Chase & Co. 1.9 % Alphabet, Inc., Class C 1.9 % Elevance Health, Inc. 1.8 % AbbVie, Inc 1.7 % Asset Categories Equity Sector Allocation |
| Largest Holdings [Text Block] | Top Holdings Microsoft Corp. 6.9 % Apple, Inc. 6.7 % NVIDIA Corp. 6.5 % Amazon.com, Inc. 4.4 % Meta Platforms, Inc., Class A 2.8 % Alphabet, Inc., Class A 2.0 % JPMorgan Chase & Co. 1.9 % Alphabet, Inc., Class C 1.9 % Elevance Health, Inc. 1.8 % AbbVie, Inc 1.7 % |
| Updated Prospectus Web Address | columbiathreadneedleus.com/investment-products/mutual-funds |
| Columbia Contrarian Core Fund - Institutional 3 Class | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Contrarian Core Fund |
| Class Name | Institutional 3 Class |
| Trading Symbol | COFYX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Columbia Contrarian Core Fund (the Fund) for the period of September 1, 2023 to August 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 $ 0.60 % |
| Expenses Paid, Amount | $ 68 |
| Expense Ratio, Percent | 0.60% |
| 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 Stock selection Allocations Individual holdings Top Performance Detractors Stock selection Allocations Individual holdings |
| 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 27.87 16.83 12.90 Russell ® 26.60 15.55 12.66 |
| 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 | $ 14,614,092,430 |
| Holdings Count | Holding | 79 |
| Advisory Fees Paid, Amount | $ 78,501,488 |
| Investment Company, Portfolio Turnover | 51% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio 79 Management services fees $ Portfolio turnover for the reporting period 51% |
| 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. Top Holdings Microsoft Corp. 6.9 % Apple, Inc. 6.7 % NVIDIA Corp. 6.5 % Amazon.com, Inc. 4.4 % Meta Platforms, Inc., Class A 2.8 % Alphabet, Inc., Class A 2.0 % JPMorgan Chase & Co. 1.9 % Alphabet, Inc., Class C 1.9 % Elevance Health, Inc. 1.8 % AbbVie 1.7 % Asset Categories Equity Sector Allocation |
| Largest Holdings [Text Block] | Top Holdings Microsoft Corp. 6.9 % Apple, Inc. 6.7 % NVIDIA Corp. 6.5 % Amazon.com, Inc. 4.4 % Meta Platforms, Inc., Class A 2.8 % Alphabet, Inc., Class A 2.0 % JPMorgan Chase & Co. 1.9 % Alphabet, Inc., Class C 1.9 % Elevance Health, Inc. 1.8 % AbbVie 1.7 % |
| Updated Prospectus Web Address | columbiathreadneedleus.com/investment-products/mutual-funds |
| Columbia Contrarian Core Fund - Class R | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Contrarian Core Fund |
| Class Name | Class R |
| Trading Symbol | CCCRX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Columbia Contrarian Core Fund (the Fund) for the period of September 1, 2023 to August 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 R $ 1.22 % |
| Expenses Paid, Amount | $ 138 |
| Expense Ratio, Percent | 1.22% |
| Factors Affecting Performance [Text Block] | Management's Discussion of Fund Performance The performance of Class R shares for the period presented is shown in the Average Annual Total Returns table. Top Performance Contributors Stock selection Allocations Individual holdings Top Performance Detractors Stock selection Allocations Individual holdings |
| 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 R 27.07 16.10 12.17 Russell ® 26.60 15.55 12.66 |
| 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 | $ 14,614,092,430 |
| Holdings Count | Holding | 79 |
| Advisory Fees Paid, Amount | $ 78,501,488 |
| Investment Company, Portfolio Turnover | 51% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio 79 Management services fees $ Portfolio turnover for the reporting period 51% |
| 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. Top Holdings Microsoft Corp. 6.9 % Apple, Inc. 6.7 % NVIDIA Corp. 6.5 % Amazon.com, Inc. 4.4 % Meta Platforms, Inc 2.8 % Alphabet, Inc., Class A 2.0 % JPMorgan Chase & Co. 1.9 % Alphabet, Inc., Class C 1.9 % Elevance Health, Inc. 1.8 % AbbVie, Inc. 1.7 % Asset Categories Equity Sector Allocation |
| Largest Holdings [Text Block] | Top Holdings Microsoft Corp. 6.9 % Apple, Inc. 6.7 % NVIDIA Corp. 6.5 % Amazon.com, Inc. 4.4 % Meta Platforms, Inc 2.8 % Alphabet, Inc., Class A 2.0 % JPMorgan Chase & Co. 1.9 % Alphabet, Inc., Class C 1.9 % Elevance Health, Inc. 1.8 % AbbVie, Inc. 1.7 % |
| Updated Prospectus Web Address | columbiathreadneedleus.com/investment-products/mutual-funds |
| Shareholder Report, Line Graph (Details) - USD ($) | 12 Months Ended | ||||||||||
| Aug. 31, 2024 | Aug. 31, 2023 | Aug. 31, 2022 | Aug. 31, 2021 | Aug. 31, 2020 | Aug. 31, 2019 | Aug. 31, 2018 | Aug. 31, 2017 | Aug. 31, 2016 | Aug. 31, 2015 | Aug. 31, 2014 | |
| Columbia Contrarian Core Fund - Class R | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Class R | ||||||||||
| Account Value | $ 31,546 | $ 24,826 | $ 21,040 | $ 24,338 | $ 18,462 | $ 14,953 | $ 14,625 | $ 12,967 | $ 11,242 | $ 10,169 | $ 10,000 |
| Columbia Contrarian Core Fund - Institutional 3 Class | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Institutional 3 Class | ||||||||||
| Account Value | $ 33,636 | 26,304 | 22,160 | 25,472 | 19,204 | 15,454 | 15,019 | 13,232 | 11,393 | 10,244 | 10,000 |
| Columbia Contrarian Core Fund - Institutional 2 Class | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Institutional 2 Class | ||||||||||
| Account Value | $ 33,473 | 26,190 | 22,072 | 25,380 | 19,143 | 15,414 | 14,993 | 13,209 | 11,383 | 10,234 | 10,000 |
| Columbia Contrarian Core Fund - Institutional Class | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Institutional Class | ||||||||||
| Account Value | $ 33,177 | 25,977 | 21,907 | 25,207 | 19,028 | 15,335 | 14,924 | 13,164 | 11,354 | 10,224 | 10,000 |
| Columbia Contrarian Core Fund - Class C | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Class C (including sales charges) | ||||||||||
| Account Value | $ 30,003 | 23,727 | 20,214 | 23,492 | 17,914 | 14,582 | 14,334 | 12,773 | 11,127 | 10,117 | 10,000 |
| Columbia Contrarian Core Fund - Advisor Class | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Advisor Class | ||||||||||
| Account Value | $ 33,173 | 25,968 | 21,904 | 25,203 | 19,026 | 15,336 | 14,926 | 13,163 | 11,356 | 10,225 | 10,000 |
| Columbia Contrarian Core Fund - Class A | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Class A (including sales charges) | ||||||||||
| Account Value | $ 30,499 | 23,937 | 20,237 | 23,353 | 17,672 | 14,274 | 13,928 | 12,315 | 10,652 | 9,615 | 9,427 |
| Russell 1000 Index [Member] | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Russell® 1000 Index | ||||||||||
| Account Value | $ 32,952 | $ 26,029 | $ 22,555 | $ 25,914 | $ 19,595 | $ 15,996 | $ 15,607 | $ 13,025 | $ 11,214 | $ 10,040 | $ 10,000 |
| Shareholder Report, Average Annual Return (Details) | 12 Months Ended | 60 Months Ended | 120 Months Ended |
| Aug. 31, 2024 | Aug. 31, 2024 | Aug. 31, 2024 | |
| Columbia Contrarian Core Fund - Class R | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class R | ||
| Average Annual Return, Percent | 27.07% | 16.10% | 12.17% |
| Columbia Contrarian Core Fund - Institutional 3 Class | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Institutional 3 Class | ||
| Average Annual Return, Percent | 27.87% | 16.83% | 12.90% |
| Columbia Contrarian Core Fund - Institutional 2 Class | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Institutional 2 Class | ||
| Average Annual Return, Percent | 27.81% | 16.78% | 12.84% |
| Columbia Contrarian Core Fund - Institutional Class | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Institutional Class | ||
| Average Annual Return, Percent | 27.72% | 16.69% | 12.74% |
| Columbia Contrarian Core Fund - Class C | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class C (including sales charges) | ||
| Average Annual Return, Percent | 25.45% | 15.52% | 11.61% |
| Columbia Contrarian Core Fund - Advisor Class | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Advisor Class | ||
| Average Annual Return, Percent | 27.75% | 16.69% | 12.74% |
| Columbia Contrarian Core Fund - Class A | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class A (including sales charges) | ||
| Average Annual Return, Percent | 20.10% | 15.03% | 11.80% |
| Without Sales Load [Member] | Columbia Contrarian Core Fund - Class C | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class C (excluding sales charges) | ||
| Average Annual Return, Percent | 26.45% | 15.52% | 11.61% |
| Without Sales Load [Member] | Columbia Contrarian Core Fund - Class A | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class A (excluding sales charges) | ||
| Average Annual Return, Percent | 27.42% | 16.40% | 12.46% |
| Russell 1000 Index [Member] | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Russell® 1000 Index | ||
| Average Annual Return, Percent | 26.60% | 15.55% | 12.66% |
| Shareholder Report, Holdings (Details) | Aug. 31, 2024 |
| Columbia Contrarian Core Fund - Class A | Microsoft Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| Columbia Contrarian Core Fund - Class A | Apple, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.70% |
| Columbia Contrarian Core Fund - Class A | NVIDIA Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| Columbia Contrarian Core Fund - Class A | Amazon.com, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Columbia Contrarian Core Fund - Class A | Meta Platforms, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Columbia Contrarian Core Fund - Class A | Alphabet, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Columbia Contrarian Core Fund - Class A | JPMorgan Chase & Co. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Columbia Contrarian Core Fund - Class A | Alphabet, Inc., Class C [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Columbia Contrarian Core Fund - Class A | Elevance Health, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Columbia Contrarian Core Fund - Class A | AbbVie, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Columbia Contrarian Core Fund - Class A | Information Technology Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 30.20% |
| Columbia Contrarian Core Fund - Class A | Healthcare Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| Columbia Contrarian Core Fund - Class A | Financial Services Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.90% |
| Columbia Contrarian Core Fund - Class A | Communications Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.20% |
| Columbia Contrarian Core Fund - Class A | Industrial Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| Columbia Contrarian Core Fund - Class A | Consumer Discretionary Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.10% |
| Columbia Contrarian Core Fund - Class A | Consumer Staples Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Columbia Contrarian Core Fund - Class A | Energy Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Columbia Contrarian Core Fund - Class A | Materials Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Columbia Contrarian Core Fund - Class A | Utilities Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Columbia Contrarian Core Fund - Class A | Unclassified Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| Columbia Contrarian Core Fund - Class A | Common Stocks [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 97.70% |
| Columbia Contrarian Core Fund - Class A | Money Market Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Columbia Contrarian Core Fund - Advisor Class | Microsoft Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| Columbia Contrarian Core Fund - Advisor Class | Apple, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.70% |
| Columbia Contrarian Core Fund - Advisor Class | NVIDIA Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| Columbia Contrarian Core Fund - Advisor Class | Amazon.com, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Columbia Contrarian Core Fund - Advisor Class | Meta Platforms, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Columbia Contrarian Core Fund - Advisor Class | Alphabet, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Columbia Contrarian Core Fund - Advisor Class | JPMorgan Chase & Co. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Columbia Contrarian Core Fund - Advisor Class | Alphabet, Inc., Class C [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Columbia Contrarian Core Fund - Advisor Class | Elevance Health, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Columbia Contrarian Core Fund - Advisor Class | AbbVie, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Columbia Contrarian Core Fund - Advisor Class | Information Technology Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 30.20% |
| Columbia Contrarian Core Fund - Advisor Class | Healthcare Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| Columbia Contrarian Core Fund - Advisor Class | Financial Services Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.90% |
| Columbia Contrarian Core Fund - Advisor Class | Communications Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.20% |
| Columbia Contrarian Core Fund - Advisor Class | Industrial Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| Columbia Contrarian Core Fund - Advisor Class | Consumer Discretionary Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.10% |
| Columbia Contrarian Core Fund - Advisor Class | Consumer Staples Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Columbia Contrarian Core Fund - Advisor Class | Energy Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Columbia Contrarian Core Fund - Advisor Class | Materials Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Columbia Contrarian Core Fund - Advisor Class | Utilities Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Columbia Contrarian Core Fund - Advisor Class | Unclassified Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| Columbia Contrarian Core Fund - Advisor Class | Common Stocks [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 97.70% |
| Columbia Contrarian Core Fund - Advisor Class | Money Market Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Columbia Contrarian Core Fund - Class C | Microsoft Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| Columbia Contrarian Core Fund - Class C | Apple, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.70% |
| Columbia Contrarian Core Fund - Class C | NVIDIA Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| Columbia Contrarian Core Fund - Class C | Amazon.com, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Columbia Contrarian Core Fund - Class C | Meta Platforms, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Columbia Contrarian Core Fund - Class C | Alphabet, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Columbia Contrarian Core Fund - Class C | JPMorgan Chase & Co. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Columbia Contrarian Core Fund - Class C | Alphabet, Inc., Class C [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Columbia Contrarian Core Fund - Class C | Elevance Health, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Columbia Contrarian Core Fund - Class C | AbbVie, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Columbia Contrarian Core Fund - Class C | Information Technology Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 30.20% |
| Columbia Contrarian Core Fund - Class C | Healthcare Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| Columbia Contrarian Core Fund - Class C | Financial Services Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.90% |
| Columbia Contrarian Core Fund - Class C | Communications Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.20% |
| Columbia Contrarian Core Fund - Class C | Industrial Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| Columbia Contrarian Core Fund - Class C | Consumer Discretionary Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.10% |
| Columbia Contrarian Core Fund - Class C | Consumer Staples Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Columbia Contrarian Core Fund - Class C | Energy Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Columbia Contrarian Core Fund - Class C | Materials Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Columbia Contrarian Core Fund - Class C | Utilities Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Columbia Contrarian Core Fund - Class C | Unclassified Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| Columbia Contrarian Core Fund - Class C | Common Stocks [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 97.70% |
| Columbia Contrarian Core Fund - Class C | Money Market Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Columbia Contrarian Core Fund - Institutional Class | Microsoft Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| Columbia Contrarian Core Fund - Institutional Class | Apple, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.70% |
| Columbia Contrarian Core Fund - Institutional Class | NVIDIA Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| Columbia Contrarian Core Fund - Institutional Class | Amazon.com, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Columbia Contrarian Core Fund - Institutional Class | Meta Platforms, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Columbia Contrarian Core Fund - Institutional Class | Alphabet, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Columbia Contrarian Core Fund - Institutional Class | JPMorgan Chase & Co. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Columbia Contrarian Core Fund - Institutional Class | Alphabet, Inc., Class C [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Columbia Contrarian Core Fund - Institutional Class | Elevance Health, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Columbia Contrarian Core Fund - Institutional Class | AbbVie, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Columbia Contrarian Core Fund - Institutional Class | Information Technology Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 30.20% |
| Columbia Contrarian Core Fund - Institutional Class | Healthcare Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| Columbia Contrarian Core Fund - Institutional Class | Financial Services Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.90% |
| Columbia Contrarian Core Fund - Institutional Class | Communications Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.20% |
| Columbia Contrarian Core Fund - Institutional Class | Industrial Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| Columbia Contrarian Core Fund - Institutional Class | Consumer Discretionary Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.10% |
| Columbia Contrarian Core Fund - Institutional Class | Consumer Staples Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Columbia Contrarian Core Fund - Institutional Class | Energy Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Columbia Contrarian Core Fund - Institutional Class | Materials Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Columbia Contrarian Core Fund - Institutional Class | Utilities Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Columbia Contrarian Core Fund - Institutional Class | Unclassified Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| Columbia Contrarian Core Fund - Institutional Class | Common Stocks [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 97.70% |
| Columbia Contrarian Core Fund - Institutional Class | Money Market Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Columbia Contrarian Core Fund - Institutional 2 Class | Microsoft Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| Columbia Contrarian Core Fund - Institutional 2 Class | Apple, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.70% |
| Columbia Contrarian Core Fund - Institutional 2 Class | NVIDIA Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| Columbia Contrarian Core Fund - Institutional 2 Class | Amazon.com, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Columbia Contrarian Core Fund - Institutional 2 Class | Meta Platforms, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Columbia Contrarian Core Fund - Institutional 2 Class | Alphabet, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Columbia Contrarian Core Fund - Institutional 2 Class | JPMorgan Chase & Co. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Columbia Contrarian Core Fund - Institutional 2 Class | Alphabet, Inc., Class C [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Columbia Contrarian Core Fund - Institutional 2 Class | Elevance Health, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Columbia Contrarian Core Fund - Institutional 2 Class | AbbVie, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Columbia Contrarian Core Fund - Institutional 2 Class | Information Technology Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 30.20% |
| Columbia Contrarian Core Fund - Institutional 2 Class | Healthcare Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| Columbia Contrarian Core Fund - Institutional 2 Class | Financial Services Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.90% |
| Columbia Contrarian Core Fund - Institutional 2 Class | Communications Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.20% |
| Columbia Contrarian Core Fund - Institutional 2 Class | Industrial Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| Columbia Contrarian Core Fund - Institutional 2 Class | Consumer Discretionary Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.10% |
| Columbia Contrarian Core Fund - Institutional 2 Class | Consumer Staples Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Columbia Contrarian Core Fund - Institutional 2 Class | Energy Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Columbia Contrarian Core Fund - Institutional 2 Class | Materials Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Columbia Contrarian Core Fund - Institutional 2 Class | Utilities Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Columbia Contrarian Core Fund - Institutional 2 Class | Unclassified Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| Columbia Contrarian Core Fund - Institutional 2 Class | Common Stocks [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 97.70% |
| Columbia Contrarian Core Fund - Institutional 2 Class | Money Market Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Columbia Contrarian Core Fund - Institutional 3 Class | Microsoft Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| Columbia Contrarian Core Fund - Institutional 3 Class | Apple, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.70% |
| Columbia Contrarian Core Fund - Institutional 3 Class | NVIDIA Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| Columbia Contrarian Core Fund - Institutional 3 Class | Amazon.com, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Columbia Contrarian Core Fund - Institutional 3 Class | Meta Platforms, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Columbia Contrarian Core Fund - Institutional 3 Class | Alphabet, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Columbia Contrarian Core Fund - Institutional 3 Class | JPMorgan Chase & Co. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Columbia Contrarian Core Fund - Institutional 3 Class | Alphabet, Inc., Class C [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Columbia Contrarian Core Fund - Institutional 3 Class | Elevance Health, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Columbia Contrarian Core Fund - Institutional 3 Class | AbbVie, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Columbia Contrarian Core Fund - Institutional 3 Class | Information Technology Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 30.20% |
| Columbia Contrarian Core Fund - Institutional 3 Class | Healthcare Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| Columbia Contrarian Core Fund - Institutional 3 Class | Financial Services Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.90% |
| Columbia Contrarian Core Fund - Institutional 3 Class | Communications Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.20% |
| Columbia Contrarian Core Fund - Institutional 3 Class | Industrial Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| Columbia Contrarian Core Fund - Institutional 3 Class | Consumer Discretionary Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.10% |
| Columbia Contrarian Core Fund - Institutional 3 Class | Consumer Staples Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Columbia Contrarian Core Fund - Institutional 3 Class | Energy Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Columbia Contrarian Core Fund - Institutional 3 Class | Materials Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Columbia Contrarian Core Fund - Institutional 3 Class | Utilities Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Columbia Contrarian Core Fund - Institutional 3 Class | Unclassified Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| Columbia Contrarian Core Fund - Institutional 3 Class | Common Stocks [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 97.70% |
| Columbia Contrarian Core Fund - Institutional 3 Class | Money Market Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Columbia Contrarian Core Fund - Class R | Microsoft Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| Columbia Contrarian Core Fund - Class R | Apple, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.70% |
| Columbia Contrarian Core Fund - Class R | NVIDIA Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| Columbia Contrarian Core Fund - Class R | Amazon.com, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Columbia Contrarian Core Fund - Class R | Meta Platforms, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Columbia Contrarian Core Fund - Class R | Alphabet, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Columbia Contrarian Core Fund - Class R | JPMorgan Chase & Co. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Columbia Contrarian Core Fund - Class R | Alphabet, Inc., Class C [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Columbia Contrarian Core Fund - Class R | Elevance Health, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Columbia Contrarian Core Fund - Class R | AbbVie, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Columbia Contrarian Core Fund - Class R | Information Technology Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 30.20% |
| Columbia Contrarian Core Fund - Class R | Healthcare Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| Columbia Contrarian Core Fund - Class R | Financial Services Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.90% |
| Columbia Contrarian Core Fund - Class R | Communications Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.20% |
| Columbia Contrarian Core Fund - Class R | Industrial Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| Columbia Contrarian Core Fund - Class R | Consumer Discretionary Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.10% |
| Columbia Contrarian Core Fund - Class R | Consumer Staples Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Columbia Contrarian Core Fund - Class R | Energy Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Columbia Contrarian Core Fund - Class R | Materials Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Columbia Contrarian Core Fund - Class R | Utilities Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Columbia Contrarian Core Fund - Class R | Unclassified Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| Columbia Contrarian Core Fund - Class R | Common Stocks [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 97.70% |
| Columbia Contrarian Core Fund - Class R | Money Market Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
