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Shareholder Report
 6 Months Ended
Jun. 30, 2024
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Wanger Advisors Trust
Entity Central Index Key 0000929521
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2024
Wanger International  
Shareholder Report [Line Items]  
Fund Name Wanger International
Class Name Wanger International
Trading Symbol WSCAX
Annual or Semi-Annual Statement [Text Block] This
semiannual shareholder report
contains important information about Wanger International (the Fund) for the period of January 1, 2024 to June 30, 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)
FundCosts of a $10,000 investmentCost paid as a percentage of a $10,000 investment
Wanger International
$
56		1.14%
Expenses Paid, Amount $ 56
Expense Ratio, Percent 1.14%
Net Assets $ 306,644,138
Holdings Count | Holding 73
Investment Company, Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
Fund net assets
$
306,644,138
Total number of portfolio holdings73
Portfolio turnover for the reporting period 11%
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 asse
ts.
Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.
Top Holdings
Dreyfus Government Cash Management Fund, Institutional Shares, 5.191%
01/07/2022 		3.4%
Auto Trader Group PLC3.2%
Munters Group AB 2.9%
Belimo Holding AG, Registered Shares 2.8%
Pro Medicus Ltd. 2.7%
Intermediate Capital Group PLC 2.5%
Hypoport SE 2.3%
BE Semiconductor Industries NV 2.2%
IMCD NV 2.1%
Rightmove PLC 2.1%
Equity Sector Allocation
Graphical Representation - Allocation 1 Chart
Geographic Allocation
Graphical Representation - Allocation 2 Chart
Largest Holdings [Text Block]
Top Holdings
Dreyfus Government Cash Management Fund, Institutional Shares, 5.191%
01/07/2022 		3.4%
Auto Trader Group PLC3.2%
Munters Group AB 2.9%
Belimo Holding AG, Registered Shares 2.8%
Pro Medicus Ltd. 2.7%
Intermediate Capital Group PLC 2.5%
Hypoport SE 2.3%
BE Semiconductor Industries NV 2.2%
IMCD NV 2.1%
Rightmove PLC 2.1%