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Shareholder Report
 6 Months Ended
Oct. 31, 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 Oct. 31, 2024
Multi-Manager Directional Alternative Strategies Fund - Institutional Class  
Shareholder Report [Line Items]  
Fund Name Multi-Manager Directional Alternative Strategies Fund
Class Name Institutional Class
Trading Symbol CDAZX
Annual or Semi-Annual Statement [Text Block] This
semiannual shareholder report
contains important information about Multi-Manager Directional Alternative Strategies Fund (the Fund) for the period of May 1, 2024 to October 31, 2024.
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
. You can also request more information by contacting us at
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)
ClassCost of a $10,000 investmentCost paid as a percentage of a $10,000 investment
Institutional Class
$
134		2.53
%
(a)
(a)
Annualized.
Expenses Paid, Amount $ 134
Expense Ratio, Percent 2.53% [1]
Net Assets $ 286,272,083
Holdings Count | Holding 810
Investment Company, Portfolio Turnover 127.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
Fund net assets
$
286,272,083
Total number of portfolio holdings810
Portfolio turnover for the reporting period127%
Holdings [Text Block]
Graphical Representation of Fund
 
Holdings
The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.
Derivative Exposure
Long
Equity Risk48.1
%
Short
Equity Risk47.8
%
Asset Categories
Graphical Representation - Allocation 1 Chart
Equity Sector Allocation
Graphical Representation - Allocation 2 Chart
[1] Annualized.