Form N-CSR Cover
| Form N-CSR Cover | 6 Months Ended |
| Jun. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| 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 | Jun. 30, 2024 |
Shareholder Report
| Shareholder Report | 6 Months Ended |
| Jun. 30, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| 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 | Jun. 30, 2024 |
| Columbia Real Estate Equity Fund Class A | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Real Estate Equity Fund |
| Class Name | Class A |
| Trading Symbol | CREAX |
| Annual or Semi-Annual Statement [Text Block] | This semiannual shareholder report |
| Shareholder Report Annual or Semi-Annual | Semi-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 Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $ 1.21 % |
| Expenses Paid, Amount | $ 60 |
| Expense Ratio, Percent | 1.21% |
| Net Assets | $ 155,774,626 |
| Holdings Count | Holding | 64 |
| Investment Company, Portfolio Turnover | 18% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 64 Portfolio turnover for the reporting period 18% |
| Holdings [Text Block] | Graphical Representation of Fund Top Holdings Prologis, Inc 9.5% Equinix, Inc. 8.9% Simon Property Group, Inc. 5.7% Welltower, Inc. 5.6% Public Storage 4.7% Equity Residential 4.4% Invitation Homes, Inc. 3.4% Extra Space Storage, Inc. 2.9% Realty Income Corp. 2.8% Kimco Realty Corp. 2.7% Asset Categories Real Estate Sub-industry Allocation |
| Largest Holdings [Text Block] | Top Holdings Prologis, Inc 9.5% Equinix, Inc. 8.9% Simon Property Group, Inc. 5.7% Welltower, Inc. 5.6% Public Storage 4.7% Equity Residential 4.4% Invitation Homes, Inc. 3.4% Extra Space Storage, Inc. 2.9% Realty Income Corp. 2.8% Kimco Realty Corp. 2.7% |
| Columbia Real Estate Equity Fund Advisor Class | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Real Estate Equity Fund |
| Class Name | Advisor Class |
| Trading Symbol | CRERX |
| Annual or Semi-Annual Statement [Text Block] | This semiannual shareholder report |
| Shareholder Report Annual or Semi-Annual | Semi-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 Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Advisor Class $ 0.96 % |
| Expenses Paid, Amount | $ 47 |
| Expense Ratio, Percent | 0.96% |
| Net Assets | $ 155,774,626 |
| Holdings Count | Holding | 64 |
| Investment Company, Portfolio Turnover | 18% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 64 Portfolio turnover for the reporting period 18% |
| Holdings [Text Block] | Graphical Representation of Fund Top Holdings Prologis, Inc. 9.5% Equinix, Inc. 8.9% Simon Property Group, Inc. 5.7% Welltower, Inc. 5.6% Public Storage 4.7% Equity Residential 4.4% Invitation Homes, Inc. 3.4% Extra Space Storage, Inc. 2.9% Realty Income Corp. 2.8% Kimco Realty Corp. 2.7% Asset Categories Real Estate Sub-industry Allocation |
| Largest Holdings [Text Block] | Top Holdings Prologis, Inc. 9.5% Equinix, Inc. 8.9% Simon Property Group, Inc. 5.7% Welltower, Inc. 5.6% Public Storage 4.7% Equity Residential 4.4% Invitation Homes, Inc. 3.4% Extra Space Storage, Inc. 2.9% Realty Income Corp. 2.8% Kimco Realty Corp. 2.7% |
| Columbia Real Estate Equity Fund Institutional Class | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Real Estate Equity Fund |
| Class Name | Institutional Class |
| Trading Symbol | CREEX |
| Annual or Semi-Annual Statement [Text Block] | This semiannual shareholder report |
| Shareholder Report Annual or Semi-Annual | Semi-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 Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Institutional Class $ 0.96 % |
| Expenses Paid, Amount | $ 47 |
| Expense Ratio, Percent | 0.96% |
| Net Assets | $ 155,774,626 |
| Holdings Count | Holding | 64 |
| Investment Company, Portfolio Turnover | 18% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 64 Portfolio turnover for the reporting period 18% |
| Holdings [Text Block] | Graphical Representation of Fund Top Holdings Prologis 9.5% Equinix, Inc. 8.9% Simon Property Group 5.7% Welltower, Inc. 5.6% Public Storage 4.7% Equity Residential 4.4% Invitation Homes, Inc. 3.4% Extra Space Storage, Inc. 2.9% Realty Income Corp. 2.8% Kimco Realty Corp. 2.7% Asset Categories Real Estate Sub-industry Allocation |
| Largest Holdings [Text Block] | Top Holdings Prologis 9.5% Equinix, Inc. 8.9% Simon Property Group 5.7% Welltower, Inc. 5.6% Public Storage 4.7% Equity Residential 4.4% Invitation Homes, Inc. 3.4% Extra Space Storage, Inc. 2.9% Realty Income Corp. 2.8% Kimco Realty Corp. 2.7% |
| Columbia Real Estate Equity Fund Institutional 2 Class | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Real Estate Equity Fund |
| Class Name | Institutional 2 Class |
| Trading Symbol | CRRVX |
| Annual or Semi-Annual Statement [Text Block] | This semiannual shareholder report |
| Shareholder Report Annual or Semi-Annual | Semi-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 Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Institutional 2 Class $ 0.86 % |
| Expenses Paid, Amount | $ 42 |
| Expense Ratio, Percent | 0.86% |
| Net Assets | $ 155,774,626 |
| Holdings Count | Holding | 64 |
| Investment Company, Portfolio Turnover | 18% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 64 Portfolio turnover for the reporting period 18% |
| Holdings [Text Block] | Graphical Representation of Fund Top Holdings Prologis, Inc 9.5% Equinix, Inc. 8.9% Simon Property Group, Inc. 5.7% Welltower, Inc. 5.6% Public Storage 4.7% Equity Residential 4.4% Invitation Homes, Inc. 3.4% Extra Space Storage, Inc. 2.9% Realty Income Corp. 2.8% Kimco Realty Corp. 2.7% Asset Categories Real Estate Sub-industry Allocation |
| Largest Holdings [Text Block] | Top Holdings Prologis, Inc 9.5% Equinix, Inc. 8.9% Simon Property Group, Inc. 5.7% Welltower, Inc. 5.6% Public Storage 4.7% Equity Residential 4.4% Invitation Homes, Inc. 3.4% Extra Space Storage, Inc. 2.9% Realty Income Corp. 2.8% Kimco Realty Corp. 2.7% |
| Columbia Real Estate Equity Fund Institutional 3 Class | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Real Estate Equity Fund |
| Class Name | Institutional 3 Class |
| Trading Symbol | CREYX |
| Annual or Semi-Annual Statement [Text Block] | This semiannual shareholder report |
| Shareholder Report Annual or Semi-Annual | Semi-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 Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Institutional 3 Class $ 0.81 % |
| Expenses Paid, Amount | $ 40 |
| Expense Ratio, Percent | 0.81% |
| Net Assets | $ 155,774,626 |
| Holdings Count | Holding | 64 |
| Investment Company, Portfolio Turnover | 18% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 64 Portfolio turnover for the reporting period 18% |
| Holdings [Text Block] | Graphical Representation of Fund Top Holdings Prologis, Inc. 9.5% Equinix, Inc. 8.9% Simon Property Group, Inc. 5.7% Welltower, Inc. 5.6% Public Storage 4.7% Equity Residential 4.4% Invitation Homes, Inc. 3.4% Extra Space Storage, Inc. 2.9% Realty Income 2.8% Kimco Realty Corp. 2.7% Asset Categories Real Estate Sub-industry Allocation |
| Largest Holdings [Text Block] | Top Holdings Prologis, Inc. 9.5% Equinix, Inc. 8.9% Simon Property Group, Inc. 5.7% Welltower, Inc. 5.6% Public Storage 4.7% Equity Residential 4.4% Invitation Homes, Inc. 3.4% Extra Space Storage, Inc. 2.9% Realty Income 2.8% Kimco Realty Corp. 2.7% |
Shareholder Report, Holdings (D
| Shareholder Report, Holdings (Details) | Jun. 30, 2024 |
| Columbia Real Estate Equity Fund Institutional 3 Class | Prologis, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.50% |
| Columbia Real Estate Equity Fund Institutional 3 Class | Equinix, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| Columbia Real Estate Equity Fund Institutional 3 Class | Simon Property Group, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.70% |
| Columbia Real Estate Equity Fund Institutional 3 Class | Welltower, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| Columbia Real Estate Equity Fund Institutional 3 Class | Public Storage [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| Columbia Real Estate Equity Fund Institutional 3 Class | Equity Residential [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Columbia Real Estate Equity Fund Institutional 3 Class | Invitation Homes, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| Columbia Real Estate Equity Fund Institutional 3 Class | Extra Space Storage, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Columbia Real Estate Equity Fund Institutional 3 Class | Realty Income Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Columbia Real Estate Equity Fund Institutional 3 Class | Kimco Realty Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| Columbia Real Estate Equity Fund Institutional 3 Class | Common Stock [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 93% |
| Columbia Real Estate Equity Fund Institutional 3 Class | Money Market Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| Columbia Real Estate Equity Fund Institutional 3 Class | Retail REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.40% |
| Columbia Real Estate Equity Fund Institutional 3 Class | Industrial REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.30% |
| Columbia Real Estate Equity Fund Institutional 3 Class | Health Care REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.80% |
| Columbia Real Estate Equity Fund Institutional 3 Class | Multi Family Residential REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.90% |
| Columbia Real Estate Equity Fund Institutional 3 Class | Data Center REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.10% |
| Columbia Real Estate Equity Fund Institutional 3 Class | Self Storage REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.60% |
| Columbia Real Estate Equity Fund Institutional 3 Class | Single Family Residential REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Columbia Real Estate Equity Fund Institutional 3 Class | Other Specialized REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| Columbia Real Estate Equity Fund Institutional 3 Class | Hotel and Resort REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| Columbia Real Estate Equity Fund Institutional 3 Class | Office REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Columbia Real Estate Equity Fund Institutional 3 Class | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Columbia Real Estate Equity Fund Institutional 2 Class | Prologis, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.50% |
| Columbia Real Estate Equity Fund Institutional 2 Class | Equinix, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| Columbia Real Estate Equity Fund Institutional 2 Class | Simon Property Group, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.70% |
| Columbia Real Estate Equity Fund Institutional 2 Class | Welltower, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| Columbia Real Estate Equity Fund Institutional 2 Class | Public Storage [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| Columbia Real Estate Equity Fund Institutional 2 Class | Equity Residential [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Columbia Real Estate Equity Fund Institutional 2 Class | Invitation Homes, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| Columbia Real Estate Equity Fund Institutional 2 Class | Extra Space Storage, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Columbia Real Estate Equity Fund Institutional 2 Class | Realty Income Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Columbia Real Estate Equity Fund Institutional 2 Class | Kimco Realty Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| Columbia Real Estate Equity Fund Institutional 2 Class | Common Stock [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 93% |
| Columbia Real Estate Equity Fund Institutional 2 Class | Money Market Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| Columbia Real Estate Equity Fund Institutional 2 Class | Retail REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.40% |
| Columbia Real Estate Equity Fund Institutional 2 Class | Industrial REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.30% |
| Columbia Real Estate Equity Fund Institutional 2 Class | Health Care REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.80% |
| Columbia Real Estate Equity Fund Institutional 2 Class | Multi Family Residential REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.90% |
| Columbia Real Estate Equity Fund Institutional 2 Class | Data Center REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.10% |
| Columbia Real Estate Equity Fund Institutional 2 Class | Self Storage REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.60% |
| Columbia Real Estate Equity Fund Institutional 2 Class | Single Family Residential REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Columbia Real Estate Equity Fund Institutional 2 Class | Other Specialized REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| Columbia Real Estate Equity Fund Institutional 2 Class | Hotel and Resort REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| Columbia Real Estate Equity Fund Institutional 2 Class | Office REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Columbia Real Estate Equity Fund Institutional 2 Class | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Columbia Real Estate Equity Fund Institutional Class | Prologis, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.50% |
| Columbia Real Estate Equity Fund Institutional Class | Equinix, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| Columbia Real Estate Equity Fund Institutional Class | Simon Property Group, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.70% |
| Columbia Real Estate Equity Fund Institutional Class | Welltower, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| Columbia Real Estate Equity Fund Institutional Class | Public Storage [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| Columbia Real Estate Equity Fund Institutional Class | Equity Residential [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Columbia Real Estate Equity Fund Institutional Class | Invitation Homes, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| Columbia Real Estate Equity Fund Institutional Class | Extra Space Storage, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Columbia Real Estate Equity Fund Institutional Class | Realty Income Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Columbia Real Estate Equity Fund Institutional Class | Kimco Realty Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| Columbia Real Estate Equity Fund Institutional Class | Common Stock [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 93% |
| Columbia Real Estate Equity Fund Institutional Class | Money Market Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| Columbia Real Estate Equity Fund Institutional Class | Retail REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.40% |
| Columbia Real Estate Equity Fund Institutional Class | Industrial REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.30% |
| Columbia Real Estate Equity Fund Institutional Class | Health Care REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.80% |
| Columbia Real Estate Equity Fund Institutional Class | Multi Family Residential REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.90% |
| Columbia Real Estate Equity Fund Institutional Class | Data Center REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.10% |
| Columbia Real Estate Equity Fund Institutional Class | Self Storage REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.60% |
| Columbia Real Estate Equity Fund Institutional Class | Single Family Residential REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Columbia Real Estate Equity Fund Institutional Class | Other Specialized REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| Columbia Real Estate Equity Fund Institutional Class | Hotel and Resort REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| Columbia Real Estate Equity Fund Institutional Class | Office REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Columbia Real Estate Equity Fund Institutional Class | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Columbia Real Estate Equity Fund Advisor Class | Prologis, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.50% |
| Columbia Real Estate Equity Fund Advisor Class | Equinix, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| Columbia Real Estate Equity Fund Advisor Class | Simon Property Group, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.70% |
| Columbia Real Estate Equity Fund Advisor Class | Welltower, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| Columbia Real Estate Equity Fund Advisor Class | Public Storage [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| Columbia Real Estate Equity Fund Advisor Class | Equity Residential [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Columbia Real Estate Equity Fund Advisor Class | Invitation Homes, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| Columbia Real Estate Equity Fund Advisor Class | Extra Space Storage, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Columbia Real Estate Equity Fund Advisor Class | Realty Income Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Columbia Real Estate Equity Fund Advisor Class | Kimco Realty Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| Columbia Real Estate Equity Fund Advisor Class | Common Stock [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 93% |
| Columbia Real Estate Equity Fund Advisor Class | Money Market Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| Columbia Real Estate Equity Fund Advisor Class | Retail REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.40% |
| Columbia Real Estate Equity Fund Advisor Class | Industrial REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.30% |
| Columbia Real Estate Equity Fund Advisor Class | Health Care REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.80% |
| Columbia Real Estate Equity Fund Advisor Class | Multi Family Residential REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.90% |
| Columbia Real Estate Equity Fund Advisor Class | Data Center REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.10% |
| Columbia Real Estate Equity Fund Advisor Class | Self Storage REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.60% |
| Columbia Real Estate Equity Fund Advisor Class | Single Family Residential REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Columbia Real Estate Equity Fund Advisor Class | Other Specialized REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| Columbia Real Estate Equity Fund Advisor Class | Hotel and Resort REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| Columbia Real Estate Equity Fund Advisor Class | Office REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Columbia Real Estate Equity Fund Advisor Class | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Columbia Real Estate Equity Fund Class A | Prologis, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.50% |
| Columbia Real Estate Equity Fund Class A | Equinix, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| Columbia Real Estate Equity Fund Class A | Simon Property Group, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.70% |
| Columbia Real Estate Equity Fund Class A | Welltower, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| Columbia Real Estate Equity Fund Class A | Public Storage [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| Columbia Real Estate Equity Fund Class A | Equity Residential [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Columbia Real Estate Equity Fund Class A | Invitation Homes, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| Columbia Real Estate Equity Fund Class A | Extra Space Storage, Inc. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Columbia Real Estate Equity Fund Class A | Realty Income Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Columbia Real Estate Equity Fund Class A | Kimco Realty Corp. [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| Columbia Real Estate Equity Fund Class A | Common Stock [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 93% |
| Columbia Real Estate Equity Fund Class A | Money Market Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| Columbia Real Estate Equity Fund Class A | Retail REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.40% |
| Columbia Real Estate Equity Fund Class A | Industrial REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.30% |
| Columbia Real Estate Equity Fund Class A | Health Care REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.80% |
| Columbia Real Estate Equity Fund Class A | Multi Family Residential REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.90% |
| Columbia Real Estate Equity Fund Class A | Data Center REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.10% |
| Columbia Real Estate Equity Fund Class A | Self Storage REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.60% |
| Columbia Real Estate Equity Fund Class A | Single Family Residential REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Columbia Real Estate Equity Fund Class A | Other Specialized REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| Columbia Real Estate Equity Fund Class A | Hotel and Resort REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| Columbia Real Estate Equity Fund Class A | Office REITs [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Columbia Real Estate Equity Fund Class A | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |