Columbia Funds Variable Series Trust II N-CSRS 5 Sep 24 Certified semi-annual shareholder report (management investment company) Financial data

Form N-CSR Cover

Form N-CSR Cover	6 Months Ended
	Jun. 30, 2024
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, 2024

Shareholder Report

Shareholder Report	6 Months Ended
	Jun. 30, 2024 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, 2024
Columbia Variable Portfolio - Intermediate Bond Fund Class 1
Shareholder Report [Line Items]
Fund Name	Columbia Variable Portfolio – Intermediate Bond Fund
Class Name	Class 1
No Trading Symbol Flag	true
Annual or Semi-Annual Statement [Text Block]	This semiannual shareholder report
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 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) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class 1 $26 0.52%
Expenses Paid, Amount	$ 26
Expense Ratio, Percent	0.52%
Net Assets	$ 3,408,853,516
Holdings Count | Holding	900
Investment Company, Portfolio Turnover	92%
Additional Fund Statistics [Text Block]	Key Fund Statistics Fund net assets $3,408,853,516 Total number of portfolio holdings 900 Portfolio turnover for the reporting period 92%
Holdings [Text Block]	Graphical Representation of Fund d 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. Bond ratings on Fund holdings are divided into categories ranging from highest to lowest credit quality, determined by using the middle rating of Moody’s, S&P and Fitch, after dropping the highest and lowest available ratings. When ratings ar e a age Derivative Exposure Long Credit Risk 0.9 % Foreign Exchange Risk 0.2 % Interest Rate Risk 57.1 % Short Credit Risk 3.1 % Foreign Exchange Risk 0.1 % Interest Rate Risk 24.5 % Asset Categories Credit Quality
Credit Quality Explanation [Text Block]	Bond ratings on Fund holdings are divided into categories ranging from highest to lowest credit quality, determined by using the middle rating of Moody’s, S&P and Fitch, after dropping the highest and lowest available ratings. When ratings ar e a age
Columbia Variable Portfolio - Intermediate Bond Fund Class 2
Shareholder Report [Line Items]
Fund Name	Columbia Variable Portfolio – Intermediate Bond Fund
Class Name	Class 2
No Trading Symbol Flag	true
Annual or Semi-Annual Statement [Text Block]	This semiannual shareholder report
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 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) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class 2 $38 0.77%
Expenses Paid, Amount	$ 38
Expense Ratio, Percent	0.77%
Net Assets	$ 3,408,853,516
Holdings Count | Holding	900
Investment Company, Portfolio Turnover	92%
Additional Fund Statistics [Text Block]	Key Fund Statistics Fund net assets $3,408,853,516 Total number of portfolio holdings 900 Portfolio turnover for the reporting period 92%
Holdings [Text Block]	Graphical Represent ati 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. Bond ratings on Fund holdings are divided into categories ranging from highest to lowest credit quality, determined by using the middle rating of Moody’s, S&P and Fitch, after dropping the highest and lowest available ratings. When ratings are available from only two rating agencies, the lower rating is used. When a rating is available from only one rating agency, that rating is used. If a security is not rated by Moody's, S&P and Fitch, but has a rating by Kroll and/or DBRS, the same methodology is applied to those bonds that would otherwise be not rated. When a bond is not rated by any rating agency, it is designated as “Not rated.” Credit quality ratings assigned by a rating agency are subjective opinions, not statements of fact, and are subject to change, including daily. Derivative Exposure Long Credit Risk 0.9 % Foreign Exchange Risk 0.2 % Interest Rate Risk 57.1 % Short Credit Risk 3.1 % Foreign Exchange Risk 0.1 % Interest Rate Risk 24.5 % Asset Categories Credit Quality
Credit Quality Explanation [Text Block]	Bond ratings on Fund holdings are divided into categories ranging from highest to lowest credit quality, determined by using the middle rating of Moody’s, S&P and Fitch, after dropping the highest and lowest available ratings. When ratings are available from only two rating agencies, the lower rating is used. When a rating is available from only one rating agency, that rating is used. If a security is not rated by Moody's, S&P and Fitch, but has a rating by Kroll and/or DBRS, the same methodology is applied to those bonds that would otherwise be not rated. When a bond is not rated by any rating agency, it is designated as “Not rated.” Credit quality ratings assigned by a rating agency are subjective opinions, not statements of fact, and are subject to change, including daily.
Columbia Variable Portfolio - Intermediate Bond Fund Class 3
Shareholder Report [Line Items]
Fund Name	Columbia Variable Portfolio – Intermediate Bond Fund
Class Name	Class 3
No Trading Symbol Flag	true
Annual or Semi-Annual Statement [Text Block]	This semiannual shareholder report
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 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) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class 3 $32 0.64%
Expenses Paid, Amount	$ 32
Expense Ratio, Percent	0.64%
Net Assets	$ 3,408,853,516
Holdings Count | Holding	900
Investment Company, Portfolio Turnover	92%
Additional Fund Statistics [Text Block]	Key Fund Statistics Fund net assets $3,408,853,516 Total number of portfolio holdings 900 Portfolio turnover for the reporting period 92%
Holdings [Text Block]	Graphical Representation of Fund The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivative Bond ratings on Fund holdings are divided into categories ranging from highest to lowest credit quality, determined by using the middle rating of Moody’s, S&P and Fitch, after dropping the highest and lowest available ratings. When ratings are available from only two rating agencies, the lower rating is used. When a rating is available from only one rating agency, that rating is used. If a security is not rated by Moody's, S&P and Fitch, but has a rating by Kroll and/or DBRS, the same methodology is applied to those bonds that would otherwise be not rated. When a bond is not rated by any rating agency, it is designated as “Not rated.” Credit quality ratings assigned by a rating agency are subjective opinions, not statements of fact, and are subject to change, including daily. Derivative Exposure Long Credit Risk 0.9 % Foreign Exchange Risk 0.2 % Interest Rate Risk 57.1 % Short Credit Risk 3.1 % Foreign Exchange Risk 0.1 % Interest Rate Risk 24.5 % Asset Categories Credit Quality
Credit Quality Explanation [Text Block]	Bond ratings on Fund holdings are divided into categories ranging from highest to lowest credit quality, determined by using the middle rating of Moody’s, S&P and Fitch, after dropping the highest and lowest available ratings. When ratings are available from only two rating agencies, the lower rating is used. When a rating is available from only one rating agency, that rating is used. If a security is not rated by Moody's, S&P and Fitch, but has a rating by Kroll and/or DBRS, the same methodology is applied to those bonds that would otherwise be not rated. When a bond is not rated by any rating agency, it is designated as “Not rated.” Credit quality ratings assigned by a rating agency are subjective opinions, not statements of fact, and are subject to change, including daily.

Shareholder Report, Holdings (D

Shareholder Report, Holdings (Details)	Jun. 30, 2024
Columbia Variable Portfolio - Intermediate Bond Fund Class 3 | Long Credit Risks [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.90%
Columbia Variable Portfolio - Intermediate Bond Fund Class 3 | Long Foreign Exchange Risks [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.20%
Columbia Variable Portfolio - Intermediate Bond Fund Class 3 | Long Interest Rate Risks [Member]
Holdings [Line Items]
Percent of Net Asset Value	57.10%
Columbia Variable Portfolio - Intermediate Bond Fund Class 3 | Short Credit Risks [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Columbia Variable Portfolio - Intermediate Bond Fund Class 3 | Short Foreign Exchange Risks [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%
Columbia Variable Portfolio - Intermediate Bond Fund Class 3 | Short Interest Rate Risks [Member]
Holdings [Line Items]
Percent of Net Asset Value	24.50%
Columbia Variable Portfolio - Intermediate Bond Fund Class 3 | Fitch, AA Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	57.30%
Columbia Variable Portfolio - Intermediate Bond Fund Class 3 | Fitch, A Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	14.40%
Columbia Variable Portfolio - Intermediate Bond Fund Class 3 | Fitch, BBB Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.10%
Columbia Variable Portfolio - Intermediate Bond Fund Class 3 | Fitch, BB Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.40%
Columbia Variable Portfolio - Intermediate Bond Fund Class 3 | Fitch, B Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Columbia Variable Portfolio - Intermediate Bond Fund Class 3 | Fitch, CCC Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.80%
Columbia Variable Portfolio - Intermediate Bond Fund Class 3 | Not Rated [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.60%
Columbia Variable Portfolio - Intermediate Bond Fund Class 3 | Residential MortgageBacked Securities Agency [Member]
Holdings [Line Items]
Percent of Net Asset Value	38.80%
Columbia Variable Portfolio - Intermediate Bond Fund Class 3 | Asset-Backed Securities [Member]
Holdings [Line Items]
Percent of Net Asset Value	19.60%
Columbia Variable Portfolio - Intermediate Bond Fund Class 3 | Corporate Bonds Notes [Member]
Holdings [Line Items]
Percent of Net Asset Value	19%
Columbia Variable Portfolio - Intermediate Bond Fund Class 3 | Residential MortgageBacked Securities NonAgency [Member]
Holdings [Line Items]
Percent of Net Asset Value	13.40%
Columbia Variable Portfolio - Intermediate Bond Fund Class 3 | Money Market Fund [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.60%
Columbia Variable Portfolio - Intermediate Bond Fund Class 3 | Commercial MortgageBacked Securities NonAgency [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.60%
Columbia Variable Portfolio - Intermediate Bond Fund Class 3 | Foreign Government Obligations [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.80%
Columbia Variable Portfolio - Intermediate Bond Fund Class 3 | Senior Loans [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%
Columbia Variable Portfolio - Intermediate Bond Fund Class 3 | US Treasury Obligations [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.20%
Columbia Variable Portfolio - Intermediate Bond Fund Class 3 | Other [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%
Columbia Variable Portfolio - Intermediate Bond Fund Class 2 | Long Credit Risks [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.90%
Columbia Variable Portfolio - Intermediate Bond Fund Class 2 | Long Foreign Exchange Risks [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.20%
Columbia Variable Portfolio - Intermediate Bond Fund Class 2 | Long Interest Rate Risks [Member]
Holdings [Line Items]
Percent of Net Asset Value	57.10%
Columbia Variable Portfolio - Intermediate Bond Fund Class 2 | Short Credit Risks [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Columbia Variable Portfolio - Intermediate Bond Fund Class 2 | Short Foreign Exchange Risks [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%
Columbia Variable Portfolio - Intermediate Bond Fund Class 2 | Short Interest Rate Risks [Member]
Holdings [Line Items]
Percent of Net Asset Value	24.50%
Columbia Variable Portfolio - Intermediate Bond Fund Class 2 | Fitch, AA Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	57.30%
Columbia Variable Portfolio - Intermediate Bond Fund Class 2 | Fitch, A Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	14.40%
Columbia Variable Portfolio - Intermediate Bond Fund Class 2 | Fitch, BBB Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.10%
Columbia Variable Portfolio - Intermediate Bond Fund Class 2 | Fitch, BB Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.40%
Columbia Variable Portfolio - Intermediate Bond Fund Class 2 | Fitch, B Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Columbia Variable Portfolio - Intermediate Bond Fund Class 2 | Fitch, CCC Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.80%
Columbia Variable Portfolio - Intermediate Bond Fund Class 2 | Not Rated [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.60%
Columbia Variable Portfolio - Intermediate Bond Fund Class 2 | Residential MortgageBacked Securities Agency [Member]
Holdings [Line Items]
Percent of Net Asset Value	38.80%
Columbia Variable Portfolio - Intermediate Bond Fund Class 2 | Asset-Backed Securities [Member]
Holdings [Line Items]
Percent of Net Asset Value	19.60%
Columbia Variable Portfolio - Intermediate Bond Fund Class 2 | Corporate Bonds Notes [Member]
Holdings [Line Items]
Percent of Net Asset Value	19%
Columbia Variable Portfolio - Intermediate Bond Fund Class 2 | Residential MortgageBacked Securities NonAgency [Member]
Holdings [Line Items]
Percent of Net Asset Value	13.40%
Columbia Variable Portfolio - Intermediate Bond Fund Class 2 | Money Market Fund [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.60%
Columbia Variable Portfolio - Intermediate Bond Fund Class 2 | Commercial MortgageBacked Securities NonAgency [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.60%
Columbia Variable Portfolio - Intermediate Bond Fund Class 2 | Foreign Government Obligations [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.80%
Columbia Variable Portfolio - Intermediate Bond Fund Class 2 | Senior Loans [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%
Columbia Variable Portfolio - Intermediate Bond Fund Class 2 | US Treasury Obligations [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.20%
Columbia Variable Portfolio - Intermediate Bond Fund Class 2 | Other [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%
Columbia Variable Portfolio - Intermediate Bond Fund Class 1 | Long Credit Risks [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.90%
Columbia Variable Portfolio - Intermediate Bond Fund Class 1 | Long Foreign Exchange Risks [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.20%
Columbia Variable Portfolio - Intermediate Bond Fund Class 1 | Long Interest Rate Risks [Member]
Holdings [Line Items]
Percent of Net Asset Value	57.10%
Columbia Variable Portfolio - Intermediate Bond Fund Class 1 | Short Credit Risks [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Columbia Variable Portfolio - Intermediate Bond Fund Class 1 | Short Foreign Exchange Risks [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%
Columbia Variable Portfolio - Intermediate Bond Fund Class 1 | Short Interest Rate Risks [Member]
Holdings [Line Items]
Percent of Net Asset Value	24.50%
Columbia Variable Portfolio - Intermediate Bond Fund Class 1 | Fitch, AA Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	57.30%
Columbia Variable Portfolio - Intermediate Bond Fund Class 1 | Fitch, A Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	14.40%
Columbia Variable Portfolio - Intermediate Bond Fund Class 1 | Fitch, BBB Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.10%
Columbia Variable Portfolio - Intermediate Bond Fund Class 1 | Fitch, BB Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.40%
Columbia Variable Portfolio - Intermediate Bond Fund Class 1 | Fitch, B Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Columbia Variable Portfolio - Intermediate Bond Fund Class 1 | Fitch, CCC Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.80%
Columbia Variable Portfolio - Intermediate Bond Fund Class 1 | Not Rated [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.60%
Columbia Variable Portfolio - Intermediate Bond Fund Class 1 | Residential MortgageBacked Securities Agency [Member]
Holdings [Line Items]
Percent of Net Asset Value	38.80%
Columbia Variable Portfolio - Intermediate Bond Fund Class 1 | Asset-Backed Securities [Member]
Holdings [Line Items]
Percent of Net Asset Value	19.60%
Columbia Variable Portfolio - Intermediate Bond Fund Class 1 | Corporate Bonds Notes [Member]
Holdings [Line Items]
Percent of Net Asset Value	19%
Columbia Variable Portfolio - Intermediate Bond Fund Class 1 | Residential MortgageBacked Securities NonAgency [Member]
Holdings [Line Items]
Percent of Net Asset Value	13.40%
Columbia Variable Portfolio - Intermediate Bond Fund Class 1 | Money Market Fund [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.60%
Columbia Variable Portfolio - Intermediate Bond Fund Class 1 | Commercial MortgageBacked Securities NonAgency [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.60%
Columbia Variable Portfolio - Intermediate Bond Fund Class 1 | Foreign Government Obligations [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.80%
Columbia Variable Portfolio - Intermediate Bond Fund Class 1 | Senior Loans [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%
Columbia Variable Portfolio - Intermediate Bond Fund Class 1 | US Treasury Obligations [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.20%
Columbia Variable Portfolio - Intermediate Bond Fund Class 1 | Other [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.30%