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 II
Entity Central Index Key 0001413032
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2025
Columbia Variable Portfolio – Balanced Fund - Class 1  
Shareholder Report [Line Items]  
Fund Name Columbia Variable Portfolio – Balanced Fund
Class Name Class 1
No Trading Symbol Flag true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Columbia Variable Portfolio – Balanced 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)
ClassCost of a $10,000 investmentCost paid as a percentage of a $10,000 investment
Class 1
$
38		0.75
%
(a)
(a)
Annualized.
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.75% [1]
Net Assets $ 1,605,663,307
Holdings Count | Holding 1,016
Investment Company, Portfolio Turnover 74.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
Fund net assets
$
1,605,663,307
Total number of portfolio holdings
1,016
Portfolio turnover for the reporting period
74%
Portfolio turnover for the reporting period excluding to be announced (TBA) securities
24%
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
Microsoft Corp.5.4
%
NVIDIA Corp.5.0
%
Apple, Inc.3.0
%
Amazon.com, Inc.2.6
%
Meta Platforms, Inc., Class A2.2
%
iShares Core MSCI EAFE ETF1.9
%
Uniform Mortgage-Backed Security TBA
07/14/2055 3.000%		1.7
%
JPMorgan Chase & Co.
1.5
%
Alphabet, Inc., Class A1.4
%
Broadcom, Inc.1.3
%
Asset Categories
Graphical Representation - Allocation 1 Chart
Equity Sector Allocation
Graphical Representation - Allocation 2 Chart
Largest Holdings [Text Block]
Top Holdings
Microsoft Corp.5.4
%
NVIDIA Corp.5.0
%
Apple, Inc.3.0
%
Amazon.com, Inc.2.6
%
Meta Platforms, Inc., Class A2.2
%
iShares Core MSCI EAFE ETF1.9
%
Uniform Mortgage-Backed Security TBA
07/14/2055 3.000%		1.7
%
JPMorgan Chase & Co.
1.5
%
Alphabet, Inc., Class A1.4
%
Broadcom, Inc.1.3
%
Columbia Variable Portfolio – Balanced Fund - Class 2  
Shareholder Report [Line Items]  
Fund Name Columbia Variable Portfolio – Balanced Fund
Class Name Class 2
No Trading Symbol Flag true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Columbia Variable Portfolio – Balanced 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)
ClassCost of a $10,000 investmentCost paid as a percentage of a $10,000 investment
Class 2
$
51		1.00
%
(a)
(a)
Annualized.
Expenses Paid, Amount $ 51
Expense Ratio, Percent 1.00% [1]
Net Assets $ 1,605,663,307
Holdings Count | Holding 1,016
Investment Company, Portfolio Turnover 74.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
Fund net assets
$
1,605,663,307
Total number of portfolio holdings
1,016
Portfolio turnover for the reporting period
74%
Portfolio turnover for the reporting period excluding to be announced (TBA) securities
24%
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
Microsoft Corp.5.4
%
NVIDIA Corp.5.0
%
Apple, Inc.3.0
%
Amazon.com, Inc.2.6
%
Meta Platforms, Inc., Class A2.2
%
iShares Core MSCI EAFE ETF1.9
%
Uniform Mortgage-Backed Security TBA
07/14/2055 3.000%		1.7
%
JPMorgan Chase & Co.
1.5
%
Alphabet, Inc., Class A1.4
%
Broadcom, Inc.1.3
%
Asset Categories
Graphical Representation - Allocation 1 Chart
Equity Sector Allocation
Graphical Representation - Allocation 2 Chart
Largest Holdings [Text Block]
Top Holdings
Microsoft Corp.5.4
%
NVIDIA Corp.5.0
%
Apple, Inc.3.0
%
Amazon.com, Inc.2.6
%
Meta Platforms, Inc., Class A2.2
%
iShares Core MSCI EAFE ETF1.9
%
Uniform Mortgage-Backed Security TBA
07/14/2055 3.000%		1.7
%
JPMorgan Chase & Co.
1.5
%
Alphabet, Inc., Class A1.4
%
Broadcom, Inc.1.3
%
Columbia Variable Portfolio – Balanced Fund - Class 3  
Shareholder Report [Line Items]  
Fund Name Columbia Variable Portfolio – Balanced Fund
Class Name Class 3
No Trading Symbol Flag true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Columbia Variable Portfolio – Balanced 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)
ClassCost of a $10,000 investmentCost paid as a percentage of a $10,000 investment
Class 3
$
44		0.87
%
(a)
(a)
Annualized.
Expenses Paid, Amount $ 44
Expense Ratio, Percent 0.87% [1]
Net Assets $ 1,605,663,307
Holdings Count | Holding 1,016
Investment Company, Portfolio Turnover 74.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
Fund net assets
$
1,605,663,307
Total number of portfolio holdings
1,016
Portfolio turnover for the reporting period
74%
Portfolio turnover for the reporting period excluding to be announced (TBA) securities
24%
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
Microsoft Corp.5.4
%
NVIDIA Corp.5.0
%
Apple, Inc.3.0
%
Amazon.com, Inc.2.6
%
Meta Platforms, Inc., Class A2.2
%
iShares Core MSCI EAFE ETF1.9
%
Uniform Mortgage-Backed Security TBA
07/14/2055 3.000%		1.7
%
JPMorgan Chase & Co.
1.5
%
Alphabet, Inc., Class A1.4
%
Broadcom, Inc.1.3
%
Asset Categories
Graphical Representation - Allocation 1 Chart
Equity Sector Allocation
Graphical Representation - Allocation 2 Chart
Largest Holdings [Text Block]
Top Holdings
Microsoft Corp.5.4
%
NVIDIA Corp.5.0
%
Apple, Inc.3.0
%
Amazon.com, Inc.2.6
%
Meta Platforms, Inc., Class A2.2
%
iShares Core MSCI EAFE ETF1.9
%
Uniform Mortgage-Backed Security TBA
07/14/2055 3.000%		1.7
%
JPMorgan Chase & Co.
1.5
%
Alphabet, Inc., Class A1.4
%
Broadcom, Inc.1.3
%
[1] Annualized.