v3.25.2
Shareholder Report
 6 Months Ended
Jun. 30, 2025
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Columbia Funds Variable Series Trust
Entity Central Index Key 0000929521
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2025
Columbia Variable Portfolio – Acorn Fund  
Shareholder Report [Line Items]  
Fund Name Columbia Variable Portfolio – Acorn Fund
Class Name Columbia Variable Portfolio – Acorn Fund
Trading Symbol WUSAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Columbia Variable Portfolio – Acorn Fund (the Fund) for the period of January 1, 2025 to June 30, 2025.
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)
FundCost of a $10,000 investmentCost paid as a percentage of a $10,000 investment
Columbia Variable Portfolio – Acorn Fund
$
45		0.92
%
(a)
(a)
Annualized.
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.92% [1]
Net Assets $ 467,391,012
Holdings Count | Holding 100
Investment Company, Portfolio Turnover 43.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
Fund net assets
$
467,391,012
Total number of portfolio holdings
100
Portfolio turnover for the reporting period
43%
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
SPX Technologies, Inc.2.6
%
Churchill Downs, Inc.2.4
%
GCM Grosvenor, Inc., Class A2.4
%
Parsons Corp.2.4
%
Curtiss-Wright Corp.2.2
%
Wingstop, Inc.2.2
%
Five Below, Inc.2.2
%
Carlyle Group, Inc. (The)2.1
%
HealthEquity, Inc.2.1
%
Colliers International Group, Inc.2.1
%
Asset Categories
Graphical Representation - Allocation 1 Chart
Equity Sector Allocation
Graphical Representation - Allocation 2 Chart
Largest Holdings [Text Block]
Top Holdings
SPX Technologies, Inc.2.6
%
Churchill Downs, Inc.2.4
%
GCM Grosvenor, Inc., Class A2.4
%
Parsons Corp.2.4
%
Curtiss-Wright Corp.2.2
%
Wingstop, Inc.2.2
%
Five Below, Inc.2.2
%
Carlyle Group, Inc. (The)2.1
%
HealthEquity, Inc.2.1
%
Colliers International Group, Inc.2.1
%
[1] Annualized.