| 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 | 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 – Commodity Strategy Fund Class 1 | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Variable Portfolio – Commodity Strategy 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 $ 0.76 % |
| Expenses Paid, Amount | $ 39 |
| Expense Ratio, Percent | 0.76% |
| Net Assets | $ 109,174,581 |
| Holdings Count | Holding | 305 |
| Investment Company, Portfolio Turnover | 66% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 305 Portfolio turnover for the reporting period 66% |
| 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. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change. Derivative Commodities Exposure Long Agriculture 30.9 % Energy 35.2 % Industrial Metals 16.2 % Livestock 7.4 % Precious Metals 20.5 % Asset Categories |
| Columbia Variable Portfolio – Commodity Strategy Fund Class 2 | |
| Shareholder Report [Line Items] | |
| Fund Name | Columbia Variable Portfolio – Commodity Strategy 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 $ 1.01 % |
| Expenses Paid, Amount | $ 52 |
| Expense Ratio, Percent | 1.01% |
| Net Assets | $ 109,174,581 |
| Holdings Count | Holding | 305 |
| Investment Company, Portfolio Turnover | 66% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 305 Portfolio turnover for the reporting period 66% |
| 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. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change. Derivative Commodities Exposure Long Agriculture 30.9 % Energy 35.2 % Industrial 16.2 % Livestock 7.4 % Precious Metals 20.5 % Asset Categories |
| Shareholder Report, Holdings (Details) | Jun. 30, 2024 |
| Columbia Variable Portfolio – Commodity Strategy Fund Class 2 | Long Agriculture [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 30.90% |
| Columbia Variable Portfolio – Commodity Strategy Fund Class 2 | Long Energy [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 35.20% |
| Columbia Variable Portfolio – Commodity Strategy Fund Class 2 | Long Industrial Metals [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.20% |
| Columbia Variable Portfolio – Commodity Strategy Fund Class 2 | Long Livestock [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| Columbia Variable Portfolio – Commodity Strategy Fund Class 2 | Long Precious Metals [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.50% |
| Columbia Variable Portfolio – Commodity Strategy Fund Class 2 | Money Market Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 32.80% |
| Columbia Variable Portfolio – Commodity Strategy Fund Class 2 | Corporate Bonds Notes [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.90% |
| Columbia Variable Portfolio – Commodity Strategy Fund Class 2 | AssetBacked Securities NonAgency [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.90% |
| Columbia Variable Portfolio – Commodity Strategy Fund Class 2 | Commercial MortgageBacked Securities NonAgency [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Columbia Variable Portfolio – Commodity Strategy Fund Class 2 | Residential MortgageBacked Securities NonAgency [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Columbia Variable Portfolio – Commodity Strategy Fund Class 2 | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Columbia Variable Portfolio – Commodity Strategy Fund Class 1 | Long Agriculture [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 30.90% |
| Columbia Variable Portfolio – Commodity Strategy Fund Class 1 | Long Energy [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 35.20% |
| Columbia Variable Portfolio – Commodity Strategy Fund Class 1 | Long Industrial Metals [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.20% |
| Columbia Variable Portfolio – Commodity Strategy Fund Class 1 | Long Livestock [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| Columbia Variable Portfolio – Commodity Strategy Fund Class 1 | Long Precious Metals [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.50% |
| Columbia Variable Portfolio – Commodity Strategy Fund Class 1 | Money Market Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 32.80% |
| Columbia Variable Portfolio – Commodity Strategy Fund Class 1 | Corporate Bonds Notes [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.90% |
| Columbia Variable Portfolio – Commodity Strategy Fund Class 1 | AssetBacked Securities NonAgency [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.90% |
| Columbia Variable Portfolio – Commodity Strategy Fund Class 1 | Commercial MortgageBacked Securities NonAgency [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Columbia Variable Portfolio – Commodity Strategy Fund Class 1 | Residential MortgageBacked Securities NonAgency [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Columbia Variable Portfolio – Commodity Strategy Fund Class 1 | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
