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Shareholder Report
 6 Months Ended
Aug. 31, 2024
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Columbia Funds Series Trust
Entity Central Index Key 0001097519
Entity Investment Company Type N-1A
Document Period End Date Aug. 31, 2024
Columbia Mid Cap Index Fund (Class A)  
Shareholder Report [Line Items]  
Fund Name Columbia Mid Cap Index Fund
Class Name Class A
Trading Symbol NTIAX
Annual or Semi-Annual Statement [Text Block] This
semiannual shareholder report
contains important information about Columbia Mid Cap Index Fund (the Fund) for the period of March 1, 2024 to August 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
Class A
$
23		0.45
%
Expenses Paid, Amount $ 23
Expense Ratio, Percent 0.45%
Net Assets $ 2,661,799,515
Holdings Count | Holding 403
Investment Company, Portfolio Turnover 9.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
Fund net assets
$
2,661,799,515
Total number of portfolio holdings403
Portfolio tu
rnover for th
e reporting period 		9%
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.
Top Holdings
Illumina, Inc.0.7
%
Carlisle Companies, Inc.0.7
%
Lennox International, Inc.0.7
%
EMCOR Group, Inc.0.6
%
Avantor, Inc.0.6
%
BioMarin Pharmaceutical, Inc.0.6
%
Williams-Sonoma, Inc.0.6
%
Burlington Stores, Inc.0.6
%
Reliance, Inc.0.6
%
Manhattan Associates, Inc.0.6
%
Asset Categories
Graphical Representation - Allocation 1 Chart
Equity Sector Allocation
Graphical Representation - Allocation 2 Chart
Largest Holdings [Text Block]
Top Holdings
Illumina, Inc.0.7
%
Carlisle Companies, Inc.0.7
%
Lennox International, Inc.0.7
%
EMCOR Group, Inc.0.6
%
Avantor, Inc.0.6
%
BioMarin Pharmaceutical, Inc.0.6
%
Williams-Sonoma, Inc.0.6
%
Burlington Stores, Inc.0.6
%
Reliance, Inc.0.6
%
Manhattan Associates, Inc.0.6
%
Columbia Mid Cap Index Fund (Institutional Class)  
Shareholder Report [Line Items]  
Fund Name Columbia Mid Cap Index Fund
Class Name Institutional Class
Trading Symbol NMPAX
Annual or Semi-Annual Statement [Text Block] This
semiannual shareholder report
contains important information about Columbia Mid Cap Index Fund (the Fund) for the period of March 1, 2024 to August 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
$
10		0.20
%
Expenses Paid, Amount $ 10
Expense Ratio, Percent 0.20%
Net Assets $ 2,661,799,515
Holdings Count | Holding 403
Investment Company, Portfolio Turnover 9.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
Fund net assets
$
2,661,799,515
Total n
umber o
f portfolio holdings		403
Portfolio turnover for the reporting period 9%
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.
Top Holdings
Illumina, Inc.0.7
%
Carlisle Companies, Inc.0.7
%
Lennox International, Inc.0.7
%
EMCOR Group, Inc.0.6
%
Avantor, Inc.0.6
%
BioMarin Pharmaceutical, Inc.0.6
%
Williams-Sonoma, Inc.0.6
%
Burlington Stores, Inc.0.6
%
Reliance, Inc.0.6
%
Manhatta
n Ass
ociates, Inc.		0.6
%
Asset Categories
Graphical Representation - Allocation 1 Chart
Equity Sector Allocation
Graphical Representation - Allocation 2 Chart
Largest Holdings [Text Block]
Top Holdings
Illumina, Inc.0.7
%
Carlisle Companies, Inc.0.7
%
Lennox International, Inc.0.7
%
EMCOR Group, Inc.0.6
%
Avantor, Inc.0.6
%
BioMarin Pharmaceutical, Inc.0.6
%
Williams-Sonoma, Inc.0.6
%
Burlington Stores, Inc.0.6
%
Reliance, Inc.0.6
%
Manhatta
n Ass
ociates, Inc.		0.6
%
Columbia Mid Cap Index Fund (Institutional 2 Class)  
Shareholder Report [Line Items]  
Fund Name Columbia Mid Cap Index Fund
Class Name Institutional 2 Class
Trading Symbol CPXRX
Annual or Semi-Annual Statement [Text Block] This
semiannual shareholder report
contains important information about Columbia Mid Cap Index Fund (the Fund) for the period of March 1, 2024 to August 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 2 Class
$
10		0.20
%
Expenses Paid, Amount $ 10
Expense Ratio, Percent 0.20%
Net Assets $ 2,661,799,515
Holdings Count | Holding 403
Investment Company, Portfolio Turnover 9.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
Fund net assets
$
2,661,799,515
Total number of
portfoli
o holdings		403
Portfolio turnover for the reporting period 9%
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.
Top Holdings
Illumina, Inc.0.7%
Carlisle Companies, Inc.0.7%
Lennox International, Inc.0.7%
EMCOR Group, Inc.0.6%
Avantor, Inc.0.6%
BioMarin Pharmaceutical, Inc.0.6%
Williams-Sonoma, Inc.0.6%
Burlington Stores, Inc.0.6%
Reliance, Inc.0.6%
Manhattan Associates, Inc.0.6%
Asset Categories
Graphical Representation - Allocation 1 Chart
Equity Sector Allocation
Graphical Representation - Allocation 2 Chart
Largest Holdings [Text Block]
Top Holdings
Illumina, Inc.0.7%
Carlisle Companies, Inc.0.7%
Lennox International, Inc.0.7%
EMCOR Group, Inc.0.6%
Avantor, Inc.0.6%
BioMarin Pharmaceutical, Inc.0.6%
Williams-Sonoma, Inc.0.6%
Burlington Stores, Inc.0.6%
Reliance, Inc.0.6%
Manhattan Associates, Inc.0.6%
Columbia Mid Cap Index Fund (Institutional 3 Class)  
Shareholder Report [Line Items]  
Fund Name Columbia Mid Cap Index Fund
Class Name Institutional 3 Class
Trading Symbol CMDYX
Annual or Semi-Annual Statement [Text Block] This
semiannual shareholder report
contains important information about Columbia Mid Cap Index Fund (the Fund) for the period of March 1, 2024 to August 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 3 Class
$
10		0.20
%
Expenses Paid, Amount $ 10
Expense Ratio, Percent 0.20%
Net Assets $ 2,661,799,515
Holdings Count | Holding 403
Investment Company, Portfolio Turnover 9.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
Fund
net assets
$
2,661,799,515
Total number of portfolio holdings403
Portfolio turnover for the reporting period 9%
Holdings [Text Block]
Graphical Representation of Fund
 
Holdings
The tables below show the investment makeup of the Fund represented as
a perc
entage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.
Top Holdings
Illumina, Inc.0.7
%
Carlisle Companies, Inc.0.7
%
Lennox International, Inc.0.7
%
EMCOR Group, Inc.0.6
%
Avantor, Inc.0.6
%
BioMarin Pharmaceutical, Inc.0.6
%
Williams-Sonoma, Inc.0.6
%
Burlington Stores, Inc.0.6
%
Reliance, Inc.0.6
%
Manhattan Associates, Inc.0.6
%
Asset Categories
Graphical Representation - Allocation 1 Chart
Equity Sector Allocation
Graphical Representation - Allocation 2 Chart
Largest Holdings [Text Block]
Top Holdings
Illumina, Inc.0.7
%
Carlisle Companies, Inc.0.7
%
Lennox International, Inc.0.7
%
EMCOR Group, Inc.0.6
%
Avantor, Inc.0.6
%
BioMarin Pharmaceutical, Inc.0.6
%
Williams-Sonoma, Inc.0.6
%
Burlington Stores, Inc.0.6
%
Reliance, Inc.0.6
%
Manhattan Associates, Inc.0.6
%