| 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 Global Technology Growth Fund - Class A | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Global Technology Growth Fund |
| Class Name | Class A |
| Trading Symbol | CTCAX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Columbia Global Technology Growth 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 $ 1.17 % |
| Expenses Paid, Amount | $ 136 |
| Expense Ratio, Percent | 1.17% |
| 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 Individual holdings Top Performance Detractors 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) (a),(b) 33.13 20.67 19.39 Class A (including sales charges) (a),(b) 25.47 19.25 18.68 S&P Global 1200 Information Technology Index (Net) 37.92 24.33 19.90 MSCI ACWI Index (Net) 23.44 12.14 8.78 (a) Effective August 1, 2024, the Fund compares its performance to the MSCI ACWI Index (Net), a broad-based performance index that meets new regulatory requirements. The Fund’s performance is also compared to its prior benchmark, which more closely represent the market sectors and/or asset classes in which the Fund primarily invests. (b) The Fund's performance prior to July 2014 reflects returns achieved pursuant to different principal investment strategies. If the Fund's current strategies had been in place for the prior periods, results shown may have been different. |
| 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 | $ 3,430,923,132 |
| Holdings Count | Holding | 103 |
| Advisory Fees Paid, Amount | $ 23,443,760 |
| Investment Company, Portfolio Turnover | 7% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 103 Management services fees $ Portfolio turnover for the reporting period 7% |
| Holdings [Text Block] | Graphical Representation of Fund The tables below show the investment makeup of the Fund represented as Top Holdings NVIDIA Corp. 13.4 % Apple, Inc. 9.2 % Microsoft Corp. 9.1 % Broadcom, Inc. 5.6 % Alphabet, Inc., Class A 3.5 % Amazon.com, Inc. 3.1 % Lam Research Corp. 2.9 % Meta Platforms, Inc., Class A 2.5 % Taiwan Semiconductor Manufacturing Co., Ltd., ADR 2.4 % Synopsys, Inc. 2.2 % Equity Sector Allocation Information Technology Sub-industry Allocation |
| Largest Holdings [Text Block] | Top Holdings NVIDIA Corp. 13.4 % Apple, Inc. 9.2 % Microsoft Corp. 9.1 % Broadcom, Inc. 5.6 % Alphabet, Inc., Class A 3.5 % Amazon.com, Inc. 3.1 % Lam Research Corp. 2.9 % Meta Platforms, Inc., Class A 2.5 % Taiwan Semiconductor Manufacturing Co., Ltd., ADR 2.4 % Synopsys, Inc. 2.2 % |
| Updated Prospectus Web Address | columbiathreadneedleus.com/investment-products/mutual-funds |
| Columbia Global Technology Growth Fund - Advisor Class | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Global Technology Growth Fund |
| Class Name | Advisor Class |
| Trading Symbol | CTYRX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Columbia Global Technology Growth 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 c olumbiathreadneedleus.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 $ 0.92 % |
| Expenses Paid, Amount | $ 107 |
| Expense Ratio, Percent | 0.92% |
| 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 Individual holdings Top Performance Detractors 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 (a),(b) 33.46 20.97 19.69 S&P Global 1200 Information Technology Index (Net) 37.92 24.33 19.90 MSCI ACWI Index (Net) 23.44 12.14 8.78 (a) Effective August 1, 2024, the Fund compares its performance to the MSCI ACWI Index (Net), a broad-based performance index that meets new regulatory requirements. The Fund’s performance is also compared to its prior benchmark, which more closely represent the market sectors and/or asset classes in which the Fund primarily invests. (b) The Fund's performance prior to July 2014 reflects returns achieved pursuant to different principal investment strategies. If the Fund's current strategies had been in place for the prior periods, results shown may have been different. |
| 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 | $ 3,430,923,132 |
| Holdings Count | Holding | 103 |
| Advisory Fees Paid, Amount | $ 23,443,760 |
| Investment Company, Portfolio Turnover | 7% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 103 Management services fees $ Portfolio turnover for the reporting period 7% |
| 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 compos it bje Top Holdings NVIDIA Corp. 13.4 % Apple, Inc. 9.2 % Microsoft Corp. 9.1 % Broadcom, Inc. 5.6 % Alphabet, Inc., Class A 3.5 % Amazon.com, Inc. 3.1 % Lam Research Corp. 2.9 % Meta Platforms, Inc., Class A 2.5 % Taiwan Semiconductor Manufacturing Co., Ltd., ADR 2.4 % Synopsys, Inc. 2.2 % Equity Sector Allocation Information Technology Sub-industry Allocation |
| Largest Holdings [Text Block] | Top Holdings NVIDIA Corp. 13.4 % Apple, Inc. 9.2 % Microsoft Corp. 9.1 % Broadcom, Inc. 5.6 % Alphabet, Inc., Class A 3.5 % Amazon.com, Inc. 3.1 % Lam Research Corp. 2.9 % Meta Platforms, Inc., Class A 2.5 % Taiwan Semiconductor Manufacturing Co., Ltd., ADR 2.4 % Synopsys, Inc. 2.2 % |
| Updated Prospectus Web Address | columbiathreadneedleus.com/investment-products/mutual-funds |
| Columbia Global Technology Growth Fund - Class C | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Global Technology Growth Fund |
| Class Name | Class C |
| Trading Symbol | CTHCX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Columbia Global Technology Growth 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 $ 1.92 % |
| Expenses Paid, Amount | $ 222 |
| Expense Ratio, Percent | 1.92% |
| 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 Individual holdings Top Performance Detractors 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) (a),(b) 32.15 19.77 18.49 Class C (including sales charges) (a),(b) 31.15 19.77 18.49 S&P Global 1200 Information Technology Index (Net) 37.92 24.33 19.90 MSCI ACWI Index (Net) 23.44 12.14 8.78 (a) Effective August 1, 2024, the Fund compares its performance to the MSCI ACWI Index (Net), a broad-based performance index that meets new regulatory requirements. The Fund’s performance is also compared to its prior benchmark, which more closely represent the market sectors and/or asset classes in which the Fund primarily invests. (b) The Fund's performance prior to July 2014 reflects returns achieved pursuant to different principal investment strategies. If the Fund's current strategies had been in place for the prior periods, results shown may have been different. |
| 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 | $ 3,430,923,132 |
| Holdings Count | Holding | 103 |
| Advisory Fees Paid, Amount | $ 23,443,760 |
| Investment Company, Portfolio Turnover | 7% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 103 Management services fees $ Portfolio turnover for the reporting period 7% |
| 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 co m Top Holdings NVIDIA Corp. 13.4 % Apple, Inc. 9.2 % Microsoft Corp. 9.1 % Broadcom, Inc. 5.6 % Alphabet, Inc., Class A 3.5 % Amazon.com, Inc. 3.1 % Lam Research Corp. 2.9 % Meta Platforms, Inc., Class A 2.5 % Taiwan Semiconductor Manufacturing Co., Ltd., ADR 2.4 % Synopsys, Inc. 2.2 % Equity Sector Allo ca Information Technology Sub-industry Allocation |
| Largest Holdings [Text Block] | Top Holdings NVIDIA Corp. 13.4 % Apple, Inc. 9.2 % Microsoft Corp. 9.1 % Broadcom, Inc. 5.6 % Alphabet, Inc., Class A 3.5 % Amazon.com, Inc. 3.1 % Lam Research Corp. 2.9 % Meta Platforms, Inc., Class A 2.5 % Taiwan Semiconductor Manufacturing Co., Ltd., ADR 2.4 % Synopsys, Inc. 2.2 % |
| Updated Prospectus Web Address | columbiathreadneedleus.com/investment-products/mutual-funds |
| Columbia Global Technology Growth Fund - Institutional Class | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Global Technology Growth Fund |
| Class Name | Institutional Class |
| Trading Symbol | CMTFX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Columbia Global Technology Growth 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 $ 0.92 % |
| Expenses Paid, Amount | $ 107 |
| Expense Ratio, Percent | 0.92% |
| 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 Individual holdings Top Performance Detractors 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 (a),(b) 33.47 20.98 19.69 S&P Global 1200 Information Technology Index (Net) 37.92 24.33 19.90 MSCI ACWI Index (Net) 23.44 12.14 8.78 (a) Effective August 1, 2024, the Fund compares its performance to the MSCI ACWI Index (Net), a broad-based performance index that meets new regulatory requirements. The Fund’s performance is also compared to its prior benchmark, which more closely represent the market sectors and/or asset classes in which the Fund primarily invests. (b) The Fund's performance prior to July 2014 reflects returns achieved pursuant to different principal investment strategies. If the Fund's current strategies had been in place for the prior periods, results shown may have been different. |
| 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 | $ 3,430,923,132 |
| Holdings Count | Holding | 103 |
| Advisory Fees Paid, Amount | $ 23,443,760 |
| Investment Company, Portfolio Turnover | 7% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 103 Management services fees $ Portfolio turnover for the reporting period 7% |
| Holdings [Text Block] | Graphical Representation of Fund The tables below show the investment makeup of the Fund represen te eriv Top Holdings NVIDIA Corp. 13.4 % Apple, Inc. 9.2 % Microsoft Corp. 9.1 % Broadcom, Inc. 5.6 % Alphabet, Inc., Class A 3.5 % Amazon.com, Inc. 3.1 % Lam Research Corp. 2.9 % Meta Platforms, Inc., Class A 2.5 % Taiwan Semiconductor Manufacturing Co., Ltd., ADR 2.4 % Synopsys, Inc. 2.2 % Equity Sector Allocation Information Technology Sub-industry Allocation |
| Largest Holdings [Text Block] | Top Holdings NVIDIA Corp. 13.4 % Apple, Inc. 9.2 % Microsoft Corp. 9.1 % Broadcom, Inc. 5.6 % Alphabet, Inc., Class A 3.5 % Amazon.com, Inc. 3.1 % Lam Research Corp. 2.9 % Meta Platforms, Inc., Class A 2.5 % Taiwan Semiconductor Manufacturing Co., Ltd., ADR 2.4 % Synopsys, Inc. 2.2 % |
| Updated Prospectus Web Address | columbiathreadneedleus.com/investment-products/mutual-funds |
| Columbia Global Technology Growth Fund - Institutional 2 Class | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Global Technology Growth Fund |
| Class Name | Institutional 2 Class |
| Trading Symbol | CTHRX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Columbia Global Technology Growth 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 $ 0.87 % |
| Expenses Paid, Amount | $ 101 |
| Expense Ratio, Percent | 0.87% |
| 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 Individual holdings Top Performance Detractors 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 (a),(b) 33.55 21.04 19.78 S&P Global 1200 Information Technology Index (Net) 37.92 24.33 19.90 MSCI ACWI Index (Net) 23.44 12.14 8.78 (a) Effective August 1, 2024, the Fund compares its performance to the MSCI ACWI Index (Net), a broad-based performance index that meets new regulatory requirements. The Fund’s performance is also compared to its prior benchmark, which more closely represent the market sectors and/or asset classes in which the Fund primarily invests. (b) The Fund's performance prior to July 2014 reflects returns achieved pursuant to different principal investment strategies. If the Fund's current strategies had been in place for the prior periods, results shown may have been different. |
| 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 | $ 3,430,923,132 |
| Holdings Count | Holding | 103 |
| Advisory Fees Paid, Amount | $ 23,443,760 |
| Investment Company, Portfolio Turnover | 7% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 103 Management services fees $ Portfolio turnover for the reporting period 7% |
| 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 NVIDIA Corp. 13.4 % Apple, Inc. 9.2 % Microsoft Corp. 9.1 % Broadcom, Inc. 5.6 % Alphabet, Inc., Class A 3.5 % Amazon.com, Inc. 3.1 % Lam Research Corp. 2.9 % Meta Platforms, Inc., Class A 2.5 % Taiwan Semiconductor Manufacturing Co., Ltd., ADR 2.4 % Synopsys, Inc. 2.2 % Equity Sector Allocation Inform ati gy S |
| Largest Holdings [Text Block] | Top Holdings NVIDIA Corp. 13.4 % Apple, Inc. 9.2 % Microsoft Corp. 9.1 % Broadcom, Inc. 5.6 % Alphabet, Inc., Class A 3.5 % Amazon.com, Inc. 3.1 % Lam Research Corp. 2.9 % Meta Platforms, Inc., Class A 2.5 % Taiwan Semiconductor Manufacturing Co., Ltd., ADR 2.4 % Synopsys, Inc. 2.2 % |
| Updated Prospectus Web Address | columbiathreadneedleus.com/investment-products/mutual-funds |
| Columbia Global Technology Growth Fund - Institutional 3 Class | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Global Technology Growth Fund |
| Class Name | Institutional 3 Class |
| Trading Symbol | CGTUX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Columbia Global Technology Growth 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 $ 0.82 % |
| Expenses Paid, Amount | $ 96 |
| Expense Ratio, Percent | 0.82% |
| 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 Individual holdings Top Performance Detractors 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 (a),(b),(c) 33.61 21.11 19.81 S&P Global 1200 Information Technology Index (Net) 37.92 24.33 19.90 MSCI ACWI Index (Net) 23.44 12.14 8.78 (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 MSCI ACWI Index (Net), a broad-based performance index that meets new regulatory requirements. The Fund’s performance is also compared to its prior benchmark, which more closely represent the market sectors and/or asset classes in which the Fund primarily invests. (c) The Fund's performance prior to July 2014 reflects returns achieved pursuant to different principal investment strategies. If the Fund's current strategies had been in place for the prior periods, results shown may have been different. |
| 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 | $ 3,430,923,132 |
| Holdings Count | Holding | 103 |
| Advisory Fees Paid, Amount | $ 23,443,760 |
| Investment Company, Portfolio Turnover | 7% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 103 Management services fees $ Portfolio turnover for the reporting period 7% |
| Holdings [Text Block] | Graphical Representation of Fund The tables below show the investment makeup of the Fund represented as a p et Top Holdings NVIDIA Corp. 13.4 % Apple, Inc. 9.2 % Microsoft Corp. 9.1 % Broadcom, Inc. 5.6 % Alphabet, Inc., Class A 3.5 % Amazon.com, Inc. 3.1 % Lam Research Corp. 2.9 % Meta Platforms, Inc., Class A 2.5 % Taiwan Semiconductor Manufacturing Co., Ltd., ADR 2.4 % Synopsys, Inc. 2.2 % Equity Sector Allocation Information Technology Sub-industry Allocation |
| Largest Holdings [Text Block] | Top Holdings NVIDIA Corp. 13.4 % Apple, Inc. 9.2 % Microsoft Corp. 9.1 % Broadcom, Inc. 5.6 % Alphabet, Inc., Class A 3.5 % Amazon.com, Inc. 3.1 % Lam Research Corp. 2.9 % Meta Platforms, Inc., Class A 2.5 % Taiwan Semiconductor Manufacturing Co., Ltd., ADR 2.4 % Synopsys, Inc. 2.2 % |
| 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 Global Technology Growth Fund - Institutional 3 Class | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Institutional 3 Class | ||||||||||
| Account Value | $ 60,965 | $ 45,628 | $ 35,255 | $ 46,568 | $ 35,208 | $ 23,401 | $ 22,399 | $ 16,999 | $ 12,503 | $ 10,600 | $ 10,000 |
| Columbia Global Technology Growth Fund - Institutional 2 Class | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Institutional 2 Class | ||||||||||
| Account Value | $ 60,781 | 45,512 | 35,182 | 46,496 | 35,171 | 23,392 | 22,401 | 17,005 | 12,518 | 10,613 | 10,000 |
| Columbia Global Technology Growth Fund - Institutional Class | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Institutional Class | ||||||||||
| Account Value | $ 60,332 | 45,203 | 34,959 | 46,229 | 34,992 | 23,283 | 22,319 | 16,955 | 12,490 | 10,600 | 10,000 |
| Columbia Global Technology Growth Fund - Class C | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Class C (including sales charges) | ||||||||||
| Account Value | $ 54,569 | 41,294 | 32,262 | 43,088 | 32,941 | 22,142 | 21,433 | 16,447 | 12,238 | 10,491 | 10,000 |
| Columbia Global Technology Growth Fund - Advisor Class | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Advisor Class | ||||||||||
| Account Value | $ 60,328 | 45,203 | 34,957 | 46,227 | 34,989 | 23,285 | 22,318 | 16,953 | 12,487 | 10,604 | 10,000 |
| Columbia Global Technology Growth Fund - Class A | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Class A (including sales charges) | ||||||||||
| Account Value | $ 55,438 | 41,642 | 32,286 | 42,801 | 32,474 | 21,667 | 20,818 | 15,852 | 11,707 | 9,962 | 9,425 |
| S&P Global 1200 Information Technology Index (Net) [Member] | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | S&P Global 1200 Information Technology Index (Net) | ||||||||||
| Account Value | $ 61,395 | 44,514 | 34,072 | 42,087 | 31,783 | 20,666 | 19,953 | 15,713 | 11,914 | 9,983 | 10,000 |
| MSCI ACWI Index (Net) [Member] | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | MSCI ACWI Index (Net) | ||||||||||
| Account Value | $ 23,192 | $ 18,788 | $ 16,488 | $ 19,601 | $ 15,237 | $ 13,077 | $ 13,113 | $ 11,770 | $ 10,050 | $ 9,371 | $ 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 Global Technology Growth Fund - Institutional 3 Class | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Institutional 3 Class | |||
| Average Annual Return, Percent | [1],[2],[3] | 33.61% | 21.11% | 19.81% |
| Columbia Global Technology Growth Fund - Institutional 2 Class | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Institutional 2 Class | |||
| Average Annual Return, Percent | [1],[2] | 33.55% | 21.04% | 19.78% |
| Columbia Global Technology Growth Fund - Institutional Class | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Institutional Class | |||
| Average Annual Return, Percent | [1],[2] | 33.47% | 20.98% | 19.69% |
| Columbia Global Technology Growth Fund - Class C | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class C (including sales charges) | |||
| Average Annual Return, Percent | [1],[2] | 31.15% | 19.77% | 18.49% |
| Columbia Global Technology Growth Fund - Advisor Class | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Advisor Class | |||
| Average Annual Return, Percent | [1],[2] | 33.46% | 20.97% | 19.69% |
| Columbia Global Technology Growth Fund - Class A | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class A (including sales charges) | |||
| Average Annual Return, Percent | [1],[2] | 25.47% | 19.25% | 18.68% |
| Without Sales Load [Member] | Columbia Global Technology Growth Fund - Class C | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class C (excluding sales charges) | |||
| Average Annual Return, Percent | [1],[2] | 32.15% | 19.77% | 18.49% |
| Without Sales Load [Member] | Columbia Global Technology Growth Fund - Class A | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class A (excluding sales charges) | |||
| Average Annual Return, Percent | [1],[2] | 33.13% | 20.67% | 19.39% |
| S&P Global 1200 Information Technology Index (Net) [Member] | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | S&P Global 1200 Information Technology Index (Net) | |||
| Average Annual Return, Percent | 37.92% | 24.33% | 19.90% | |
| MSCI ACWI Index (Net) [Member] | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | MSCI ACWI Index (Net) | |||
| Average Annual Return, Percent | 23.44% | 12.14% | 8.78% | |
| [1]Effective August 1, 2024, the Fund compares its performance to the MSCI ACWI Index (Net), a broad-based performance index that meets new regulatory requirements. The Fund’s performance is also compared to its prior benchmark, which more closely represent the market sectors and/or asset classes in which the Fund primarily invests.[2]The Fund's performance prior to July 2014 reflects returns achieved pursuant to different principal investment strategies. If the Fund's current strategies had been in place for the prior periods, results shown may have been different.[3]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 for more information. | ||||
| Shareholder Report, Holdings (Details) | Aug. 31, 2024 |
| Columbia Global Technology Growth Fund - Class A | NVIDIA Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.40% |
| Columbia Global Technology Growth Fund - Class A | Apple, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.20% |
| Columbia Global Technology Growth Fund - Class A | Microsoft Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.10% |
| Columbia Global Technology Growth Fund - Class A | Broadcom, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| Columbia Global Technology Growth Fund - Class A | Alphabet, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Columbia Global Technology Growth Fund - Class A | Amazon.com, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| Columbia Global Technology Growth Fund - Class A | Lam Research Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Columbia Global Technology Growth Fund - Class A | Meta Platforms, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Columbia Global Technology Growth Fund - Class A | Taiwan Semiconductor Manufacturing Co., Ltd., ADR [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Columbia Global Technology Growth Fund - Class A | Synopsys, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Columbia Global Technology Growth Fund - Class A | Information Technology Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 77.10% |
| Columbia Global Technology Growth Fund - Class A | Communications Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.70% |
| Columbia Global Technology Growth Fund - Class A | Financial Services Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| Columbia Global Technology Growth Fund - Class A | Consumer Discretionary Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| Columbia Global Technology Growth Fund - Class A | Industrial Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Columbia Global Technology Growth Fund - Class A | Unclassified Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Columbia Global Technology Growth Fund - Class A | Semiconductors [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.80% |
| Columbia Global Technology Growth Fund - Class A | Systems Software [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.50% |
| Columbia Global Technology Growth Fund - Class A | Technology Hardware Storage And Peripherals [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.20% |
| Columbia Global Technology Growth Fund - Class A | Application Software [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.40% |
| Columbia Global Technology Growth Fund - Class A | Semiconductor Materials And Equipment [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Columbia Global Technology Growth Fund - Class A | Communications Equipment [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Columbia Global Technology Growth Fund - Class A | Internet Services And Infrastructure [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Columbia Global Technology Growth Fund - Class A | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| Columbia Global Technology Growth Fund - Advisor Class | NVIDIA Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.40% |
| Columbia Global Technology Growth Fund - Advisor Class | Apple, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.20% |
| Columbia Global Technology Growth Fund - Advisor Class | Microsoft Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.10% |
| Columbia Global Technology Growth Fund - Advisor Class | Broadcom, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| Columbia Global Technology Growth Fund - Advisor Class | Alphabet, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Columbia Global Technology Growth Fund - Advisor Class | Amazon.com, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| Columbia Global Technology Growth Fund - Advisor Class | Lam Research Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Columbia Global Technology Growth Fund - Advisor Class | Meta Platforms, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Columbia Global Technology Growth Fund - Advisor Class | Taiwan Semiconductor Manufacturing Co., Ltd., ADR [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Columbia Global Technology Growth Fund - Advisor Class | Synopsys, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Columbia Global Technology Growth Fund - Advisor Class | Information Technology Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 77.10% |
| Columbia Global Technology Growth Fund - Advisor Class | Communications Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.70% |
| Columbia Global Technology Growth Fund - Advisor Class | Financial Services Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| Columbia Global Technology Growth Fund - Advisor Class | Consumer Discretionary Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| Columbia Global Technology Growth Fund - Advisor Class | Industrial Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Columbia Global Technology Growth Fund - Advisor Class | Unclassified Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Columbia Global Technology Growth Fund - Advisor Class | Semiconductors [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.80% |
| Columbia Global Technology Growth Fund - Advisor Class | Systems Software [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.50% |
| Columbia Global Technology Growth Fund - Advisor Class | Technology Hardware Storage And Peripherals [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.20% |
| Columbia Global Technology Growth Fund - Advisor Class | Application Software [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.40% |
| Columbia Global Technology Growth Fund - Advisor Class | Semiconductor Materials And Equipment [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Columbia Global Technology Growth Fund - Advisor Class | Communications Equipment [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Columbia Global Technology Growth Fund - Advisor Class | Internet Services And Infrastructure [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Columbia Global Technology Growth Fund - Advisor Class | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| Columbia Global Technology Growth Fund - Class C | NVIDIA Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.40% |
| Columbia Global Technology Growth Fund - Class C | Apple, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.20% |
| Columbia Global Technology Growth Fund - Class C | Microsoft Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.10% |
| Columbia Global Technology Growth Fund - Class C | Broadcom, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| Columbia Global Technology Growth Fund - Class C | Alphabet, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Columbia Global Technology Growth Fund - Class C | Amazon.com, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| Columbia Global Technology Growth Fund - Class C | Lam Research Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Columbia Global Technology Growth Fund - Class C | Meta Platforms, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Columbia Global Technology Growth Fund - Class C | Taiwan Semiconductor Manufacturing Co., Ltd., ADR [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Columbia Global Technology Growth Fund - Class C | Synopsys, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Columbia Global Technology Growth Fund - Class C | Information Technology Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 77.10% |
| Columbia Global Technology Growth Fund - Class C | Communications Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.70% |
| Columbia Global Technology Growth Fund - Class C | Financial Services Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| Columbia Global Technology Growth Fund - Class C | Consumer Discretionary Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| Columbia Global Technology Growth Fund - Class C | Industrial Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Columbia Global Technology Growth Fund - Class C | Unclassified Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Columbia Global Technology Growth Fund - Class C | Semiconductors [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.80% |
| Columbia Global Technology Growth Fund - Class C | Systems Software [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.50% |
| Columbia Global Technology Growth Fund - Class C | Technology Hardware Storage And Peripherals [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.20% |
| Columbia Global Technology Growth Fund - Class C | Application Software [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.40% |
| Columbia Global Technology Growth Fund - Class C | Semiconductor Materials And Equipment [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Columbia Global Technology Growth Fund - Class C | Communications Equipment [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Columbia Global Technology Growth Fund - Class C | Internet Services And Infrastructure [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Columbia Global Technology Growth Fund - Class C | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| Columbia Global Technology Growth Fund - Institutional Class | NVIDIA Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.40% |
| Columbia Global Technology Growth Fund - Institutional Class | Apple, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.20% |
| Columbia Global Technology Growth Fund - Institutional Class | Microsoft Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.10% |
| Columbia Global Technology Growth Fund - Institutional Class | Broadcom, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| Columbia Global Technology Growth Fund - Institutional Class | Alphabet, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Columbia Global Technology Growth Fund - Institutional Class | Amazon.com, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| Columbia Global Technology Growth Fund - Institutional Class | Lam Research Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Columbia Global Technology Growth Fund - Institutional Class | Meta Platforms, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Columbia Global Technology Growth Fund - Institutional Class | Taiwan Semiconductor Manufacturing Co., Ltd., ADR [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Columbia Global Technology Growth Fund - Institutional Class | Synopsys, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Columbia Global Technology Growth Fund - Institutional Class | Information Technology Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 77.10% |
| Columbia Global Technology Growth Fund - Institutional Class | Communications Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.70% |
| Columbia Global Technology Growth Fund - Institutional Class | Financial Services Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| Columbia Global Technology Growth Fund - Institutional Class | Consumer Discretionary Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| Columbia Global Technology Growth Fund - Institutional Class | Industrial Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Columbia Global Technology Growth Fund - Institutional Class | Unclassified Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Columbia Global Technology Growth Fund - Institutional Class | Semiconductors [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.80% |
| Columbia Global Technology Growth Fund - Institutional Class | Systems Software [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.50% |
| Columbia Global Technology Growth Fund - Institutional Class | Technology Hardware Storage And Peripherals [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.20% |
| Columbia Global Technology Growth Fund - Institutional Class | Application Software [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.40% |
| Columbia Global Technology Growth Fund - Institutional Class | Semiconductor Materials And Equipment [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Columbia Global Technology Growth Fund - Institutional Class | Communications Equipment [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Columbia Global Technology Growth Fund - Institutional Class | Internet Services And Infrastructure [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Columbia Global Technology Growth Fund - Institutional Class | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| Columbia Global Technology Growth Fund - Institutional 2 Class | NVIDIA Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.40% |
| Columbia Global Technology Growth Fund - Institutional 2 Class | Apple, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.20% |
| Columbia Global Technology Growth Fund - Institutional 2 Class | Microsoft Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.10% |
| Columbia Global Technology Growth Fund - Institutional 2 Class | Broadcom, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| Columbia Global Technology Growth Fund - Institutional 2 Class | Alphabet, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Columbia Global Technology Growth Fund - Institutional 2 Class | Amazon.com, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| Columbia Global Technology Growth Fund - Institutional 2 Class | Lam Research Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Columbia Global Technology Growth Fund - Institutional 2 Class | Meta Platforms, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Columbia Global Technology Growth Fund - Institutional 2 Class | Taiwan Semiconductor Manufacturing Co., Ltd., ADR [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Columbia Global Technology Growth Fund - Institutional 2 Class | Synopsys, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Columbia Global Technology Growth Fund - Institutional 2 Class | Information Technology Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 77.10% |
| Columbia Global Technology Growth Fund - Institutional 2 Class | Communications Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.70% |
| Columbia Global Technology Growth Fund - Institutional 2 Class | Financial Services Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| Columbia Global Technology Growth Fund - Institutional 2 Class | Consumer Discretionary Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| Columbia Global Technology Growth Fund - Institutional 2 Class | Industrial Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Columbia Global Technology Growth Fund - Institutional 2 Class | Unclassified Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Columbia Global Technology Growth Fund - Institutional 2 Class | Semiconductors [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.80% |
| Columbia Global Technology Growth Fund - Institutional 2 Class | Systems Software [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.50% |
| Columbia Global Technology Growth Fund - Institutional 2 Class | Technology Hardware Storage And Peripherals [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.20% |
| Columbia Global Technology Growth Fund - Institutional 2 Class | Application Software [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.40% |
| Columbia Global Technology Growth Fund - Institutional 2 Class | Semiconductor Materials And Equipment [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Columbia Global Technology Growth Fund - Institutional 2 Class | Communications Equipment [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Columbia Global Technology Growth Fund - Institutional 2 Class | Internet Services And Infrastructure [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Columbia Global Technology Growth Fund - Institutional 2 Class | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| Columbia Global Technology Growth Fund - Institutional 3 Class | NVIDIA Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.40% |
| Columbia Global Technology Growth Fund - Institutional 3 Class | Apple, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.20% |
| Columbia Global Technology Growth Fund - Institutional 3 Class | Microsoft Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.10% |
| Columbia Global Technology Growth Fund - Institutional 3 Class | Broadcom, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| Columbia Global Technology Growth Fund - Institutional 3 Class | Alphabet, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Columbia Global Technology Growth Fund - Institutional 3 Class | Amazon.com, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| Columbia Global Technology Growth Fund - Institutional 3 Class | Lam Research Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Columbia Global Technology Growth Fund - Institutional 3 Class | Meta Platforms, Inc., Class A [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Columbia Global Technology Growth Fund - Institutional 3 Class | Taiwan Semiconductor Manufacturing Co., Ltd., ADR [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Columbia Global Technology Growth Fund - Institutional 3 Class | Synopsys, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Columbia Global Technology Growth Fund - Institutional 3 Class | Information Technology Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 77.10% |
| Columbia Global Technology Growth Fund - Institutional 3 Class | Communications Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.70% |
| Columbia Global Technology Growth Fund - Institutional 3 Class | Financial Services Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| Columbia Global Technology Growth Fund - Institutional 3 Class | Consumer Discretionary Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| Columbia Global Technology Growth Fund - Institutional 3 Class | Industrial Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Columbia Global Technology Growth Fund - Institutional 3 Class | Unclassified Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Columbia Global Technology Growth Fund - Institutional 3 Class | Semiconductors [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.80% |
| Columbia Global Technology Growth Fund - Institutional 3 Class | Systems Software [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.50% |
| Columbia Global Technology Growth Fund - Institutional 3 Class | Technology Hardware Storage And Peripherals [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.20% |
| Columbia Global Technology Growth Fund - Institutional 3 Class | Application Software [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.40% |
| Columbia Global Technology Growth Fund - Institutional 3 Class | Semiconductor Materials And Equipment [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Columbia Global Technology Growth Fund - Institutional 3 Class | Communications Equipment [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Columbia Global Technology Growth Fund - Institutional 3 Class | Internet Services And Infrastructure [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Columbia Global Technology Growth Fund - Institutional 3 Class | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
