| 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 |
| Variable Portfolio – Conservative Portfolio Class 1 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Variable Portfolio – Conservative Portfolio |
| 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 Costs paid as a percentage of a $10,000 investment Class 1 $7 0.13% |
| Expenses Paid, Amount | $ 7 |
| Expense Ratio, Percent | 0.13% |
| Net Assets | $ 825,571,292 |
| Holdings Count | Holding | 40 |
| Investment Company, Portfolio Turnover | 15% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $825,571,292 Total number of portfolio holdings 40 Portfolio turnover for the reporting period 15% |
| 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. Top Holdings Variable Portfolio – Partners Core Bond Fund, Class 1 Shares 29.3% Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares 13.4% CTIVP ® 11.9% CTIVP ® 6.9% Columbia Variable Portfolio – U.S. Government Mortgage Fund, Class 1 Shares 3.9% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 3.5% Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 3.3% Columbia Variable Portfolio – Limited Duration Credit Fund, Class 1 Shares 2.9% Columbia Variable Portfolio – Long Government/Credit Bond Fund, Class 1 Shares 2.9% Uniform Mortgage-Backed Security TBA 1.8% Asset Categories |
| Largest Holdings [Text Block] | Top Holdings Variable Portfolio – Partners Core Bond Fund, Class 1 Shares 29.3% Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares 13.4% CTIVP ® 11.9% CTIVP ® 6.9% Columbia Variable Portfolio – U.S. Government Mortgage Fund, Class 1 Shares 3.9% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 3.5% Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 3.3% Columbia Variable Portfolio – Limited Duration Credit Fund, Class 1 Shares 2.9% Columbia Variable Portfolio – Long Government/Credit Bond Fund, Class 1 Shares 2.9% Uniform Mortgage-Backed Security TBA 1.8% |
| Variable Portfolio – Conservative Portfolio Class 2 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Variable Portfolio – Conservative Portfolio |
| 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 $19 0.38% |
| Expenses Paid, Amount | $ 19 |
| Expense Ratio, Percent | 0.38% |
| Net Assets | $ 825,571,292 |
| Holdings Count | Holding | 40 |
| Investment Company, Portfolio Turnover | 15% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $825,571,292 Total number of portfolio holdings 40 Portfolio turnover for the reporting period 15% |
| 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 Top Holdings Variable Portfolio – Partners Core Bond Fund, Class 1 Shares 29.3% Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares 13.4% CTIVP ® 11.9% CTIVP ® 6.9% Columbia Variable Portfolio – U.S. Government Mortgage Fund, Class 1 Shares 3.9% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 3.5% Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 3.3% Columbia Variable Portfolio – Limited Duration Credit Fund, Class 1 Shares 2.9% Columbia Variable Portfolio – Long Government/Credit Bond Fund, Class 1 Shares 2.9% Uniform Mortgage-Backed Security TBA 1.8% Asset Categories |
| Largest Holdings [Text Block] | Top Holdings Variable Portfolio – Partners Core Bond Fund, Class 1 Shares 29.3% Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares 13.4% CTIVP ® 11.9% CTIVP ® 6.9% Columbia Variable Portfolio – U.S. Government Mortgage Fund, Class 1 Shares 3.9% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 3.5% Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 3.3% Columbia Variable Portfolio – Limited Duration Credit Fund, Class 1 Shares 2.9% Columbia Variable Portfolio – Long Government/Credit Bond Fund, Class 1 Shares 2.9% Uniform Mortgage-Backed Security TBA 1.8% |
| Variable Portfolio – Conservative Portfolio Class 4 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Variable Portfolio – Conservative Portfolio |
| Class Name | Class 4 |
| 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 4 $19 0.38% |
| Expenses Paid, Amount | $ 19 |
| Expense Ratio, Percent | 0.38% |
| Net Assets | $ 825,571,292 |
| Holdings Count | Holding | 40 |
| Investment Company, Portfolio Turnover | 15% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $825,571,292 Total number of portfolio holdings 40 Portfolio turnover for the reporting period 15% |
| 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 Top Holdings Variable Portfolio – Partners Core Bond Fund, Class 1 Shares 29.3% Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares 13.4% CTIVP ® 11.9% CTIVP ® 6.9% Columbia Variable Portfolio – U.S. Government Mortgage Fund, Class 1 Shares 3.9% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 3.5% Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 3.3% Columbia Variable Portfolio – Limited Duration Credit Fund, Class 1 Shares 2.9% Columbia Variable Portfolio – Long Government/Credit Bond Fund, Class 1 Shares 2.9% Uniform Mortgage-Backed Security TBA 1.8% Asset Categories |
| Largest Holdings [Text Block] | Top Holdings Variable Portfolio – Partners Core Bond Fund, Class 1 Shares 29.3% Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares 13.4% CTIVP ® 11.9% CTIVP ® 6.9% Columbia Variable Portfolio – U.S. Government Mortgage Fund, Class 1 Shares 3.9% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 3.5% Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 3.3% Columbia Variable Portfolio – Limited Duration Credit Fund, Class 1 Shares 2.9% Columbia Variable Portfolio – Long Government/Credit Bond Fund, Class 1 Shares 2.9% Uniform Mortgage-Backed Security TBA 1.8% |
| Variable Portfolio – Moderately Conservative Portfolio Class 1 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Variable Portfolio – Moderately Conservative Portfolio |
| 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 $7 0.14% |
| Expenses Paid, Amount | $ 7 |
| Expense Ratio, Percent | 0.14% |
| Net Assets | $ 2,070,674,633 |
| Holdings Count | Holding | 44 |
| Investment Company, Portfolio Turnover | 15% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $2,070,674,633 Total number of portfolio holdings 44 Portfolio turnover for the reporting period 15% |
| 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. Top Holdings Variable Portfolio – Partners Core Bond Fund, Class 1 Shares 26.1% CTIVP ® 11.1% Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares 8.6% CTIVP ® 6.5% Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 4.4% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 4.1% Variable Portfolio – Partners Core Equity Fund, Class 1 Shares 2.8% Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares 2.6% Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares 2.3% Columbia Variable Portfolio – Disciplined Core Fund, Class 1 Shares 2.1% Asset Categories |
| Largest Holdings [Text Block] | Top Holdings Variable Portfolio – Partners Core Bond Fund, Class 1 Shares 26.1% CTIVP ® 11.1% Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares 8.6% CTIVP ® 6.5% Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 4.4% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 4.1% Variable Portfolio – Partners Core Equity Fund, Class 1 Shares 2.8% Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares 2.6% Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares 2.3% Columbia Variable Portfolio – Disciplined Core Fund, Class 1 Shares 2.1% |
| Variable Portfolio – Moderately Conservative Portfolio Class 2 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Variable Portfolio – Moderately Conservative Portfolio |
| 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 $20 0.39% |
| Expenses Paid, Amount | $ 20 |
| Expense Ratio, Percent | 0.39% |
| Net Assets | $ 2,070,674,633 |
| Holdings Count | Holding | 44 |
| Investment Company, Portfolio Turnover | 15% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $2,070,674,633 Total number of portfolio holdings 44 Portfolio turnover for the reporting period 15% |
| 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 Top Holdings Variable Portfolio – Partners Core Bond Fund, Class 1 Shares 26.1% CTIVP ® 11.1% Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares 8.6% CTIVP ® 6.5% Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 4.4% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 4.1% Variable Portfolio – Partners Core Equity Fund, Class 1 Shares 2.8% Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares 2.6% Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares 2.3% Columbia Variable Portfolio – Disciplined Core Fund, Class 1 Shares 2.1% Asset Categories |
| Largest Holdings [Text Block] | Top Holdings Variable Portfolio – Partners Core Bond Fund, Class 1 Shares 26.1% CTIVP ® 11.1% Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares 8.6% CTIVP ® 6.5% Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 4.4% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 4.1% Variable Portfolio – Partners Core Equity Fund, Class 1 Shares 2.8% Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares 2.6% Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares 2.3% Columbia Variable Portfolio – Disciplined Core Fund, Class 1 Shares 2.1% |
| Variable Portfolio – Moderately Conservative Portfolio Class 4 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Variable Portfolio – Moderately Conservative Portfolio |
| Class Name | Class 4 |
| 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 Class 4 $20 0.39% |
| Expenses Paid, Amount | $ 20 |
| Expense Ratio, Percent | 0.39% |
| Net Assets | $ 2,070,674,633 |
| Holdings Count | Holding | 44 |
| Investment Company, Portfolio Turnover | 15% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $2,070,674,633 Total number of portfolio holdings 44 Portfolio turnover for the reporting period 15% |
| 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. Top Holdings Variable Portfolio – Partners Core Bond Fund, Class 1 Shares 26.1% CTIVP ® 11.1% Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares 8.6% CTIVP ® 6.5% Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 4.4% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 4.1% Variable Portfolio – Partners Core Equity Fund, Class 1 Shares 2.8% Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares 2.6% Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares 2.3% Columbia Variable Portfolio – Disciplined Core Fund, Class 1 Shares 2.1% Asset Categories |
| Largest Holdings [Text Block] | Top Holdings Variable Portfolio – Partners Core Bond Fund, Class 1 Shares 26.1% CTIVP ® 11.1% Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares 8.6% CTIVP ® 6.5% Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 4.4% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 4.1% Variable Portfolio – Partners Core Equity Fund, Class 1 Shares 2.8% Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares 2.6% Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares 2.3% Columbia Variable Portfolio – Disciplined Core Fund, Class 1 Shares 2.1% |
| Variable Portfolio – Moderate Portfolio Class 1 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Variable Portfolio – Moderate Portfolio |
| 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 $7 0.14% |
| Expenses Paid, Amount | $ 7 |
| Expense Ratio, Percent | 0.14% |
| Net Assets | $ 13,967,424,111 |
| Holdings Count | Holding | 42 |
| Investment Company, Portfolio Turnover | 21% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $13,967,424,111 Total number of portfolio holdings 42 Portfolio turnover for the reporting period 21% |
| Holdings [Text Block] | Graphical Representation of Fund The tables below show the investment makeup of the Fund represented as a percentage of Fund net Top Holdings Variable Portfolio – Partners Core Bond Fund, Class 1 Shares 13.8% CTIVP ® 8.9% Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares 7.5% Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 6.1% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 5.4% CTIVP ® 5.0% Variable Portfolio – Partners Core Equity Fund, Class 1 Shares 4.9% Columbia Variable Portfolio – Long Government/Credit Bond Fund, Class 1 Shares 4.2% Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares 3.3% CTIVP ® 3.1% Asset Categories |
| Largest Holdings [Text Block] | Top Holdings Variable Portfolio – Partners Core Bond Fund, Class 1 Shares 13.8% CTIVP ® 8.9% Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares 7.5% Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 6.1% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 5.4% CTIVP ® 5.0% Variable Portfolio – Partners Core Equity Fund, Class 1 Shares 4.9% Columbia Variable Portfolio – Long Government/Credit Bond Fund, Class 1 Shares 4.2% Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares 3.3% CTIVP ® 3.1% |
| Variable Portfolio – Moderate Portfolio Class 2 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Variable Portfolio – Moderate Portfolio |
| 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 $20 0.39% |
| Expenses Paid, Amount | $ 20 |
| Expense Ratio, Percent | 0.39% |
| Net Assets | $ 13,967,424,111 |
| Holdings Count | Holding | 42 |
| Investment Company, Portfolio Turnover | 21% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $13,967,424,111 Total number of portfolio holdings 42 Portfolio turnover for the reporting period 21% |
| 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 Top Holdings Variable Portfolio – Partners Core Bond Fund, Class 1 Shares 13.8% CTIVP ® 8.9% Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares 7.5% Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 6.1% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 5.4% CTIVP ® 5.0% Variable Portfolio – Partners Core Equity Fund, Class 1 Shares 4.9% Columbia Variable Portfolio – Long Government/Credit Bond Fund, Class 1 Shares 4.2% Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares 3.3% CTIVP ® 3.1% Asset Categories |
| Largest Holdings [Text Block] | Top Holdings Variable Portfolio – Partners Core Bond Fund, Class 1 Shares 13.8% CTIVP ® 8.9% Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares 7.5% Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 6.1% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 5.4% CTIVP ® 5.0% Variable Portfolio – Partners Core Equity Fund, Class 1 Shares 4.9% Columbia Variable Portfolio – Long Government/Credit Bond Fund, Class 1 Shares 4.2% Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares 3.3% CTIVP ® 3.1% |
| Variable Portfolio – Moderate Portfolio Class 4 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Variable Portfolio – Moderate Portfolio |
| Class Name | Class 4 |
| 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 4 $20 0.39% |
| Expenses Paid, Amount | $ 20 |
| Expense Ratio, Percent | 0.39% |
| Net Assets | $ 13,967,424,111 |
| Holdings Count | Holding | 42 |
| Investment Company, Portfolio Turnover | 21% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $13,967,424,111 Total number of portfolio holdings 42 Portfolio turnover for the reporting period 21% |
| 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 Top Holdings Variable Portfolio – Partners Core Bond Fund, Class 1 Shares 13.8% CTIVP ® 8.9% Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares 7.5% Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 6.1% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 5.4% CTIVP ® 5.0% Variable Portfolio – Partners Core Equity Fund, Class 1 Shares 4.9% Columbia Variable Portfolio – Long Government/Credit Bond Fund, Class 1 Shares 4.2% Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares 3.3% CTIVP ® 3.1% Asset Categories |
| Largest Holdings [Text Block] | Top Holdings Variable Portfolio – Partners Core Bond Fund, Class 1 Shares 13.8% CTIVP ® 8.9% Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares 7.5% Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 6.1% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 5.4% CTIVP ® 5.0% Variable Portfolio – Partners Core Equity Fund, Class 1 Shares 4.9% Columbia Variable Portfolio – Long Government/Credit Bond Fund, Class 1 Shares 4.2% Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares 3.3% CTIVP ® 3.1% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 1 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Variable Portfolio – Moderately Aggressive Portfolio |
| 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 $7 0.14% |
| Expenses Paid, Amount | $ 7 |
| Expense Ratio, Percent | 0.14% |
| Net Assets | $ 5,963,408,783 |
| Holdings Count | Holding | 42 |
| Investment Company, Portfolio Turnover | 18% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $5,963,408,783 Total number of portfolio holdings 42 Portfolio turnover for the reporting period 18% |
| 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 Top Holdings Variable Portfolio – Partners Core Bond Fund, Class 1 Shares 7.4% Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 7.3% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 6.6% Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares 6.4% Variable Portfolio – Partners Core Equity Fund, Class 1 Shares 6.3% CTIVP ® 4.9% Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares 4.5% CTIVP ® 4.4% Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares 4.0% CTIVP ® 3.9% Asset Categories |
| Largest Holdings [Text Block] | Top Holdings Variable Portfolio – Partners Core Bond Fund, Class 1 Shares 7.4% Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 7.3% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 6.6% Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares 6.4% Variable Portfolio – Partners Core Equity Fund, Class 1 Shares 6.3% CTIVP ® 4.9% Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares 4.5% CTIVP ® 4.4% Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares 4.0% CTIVP ® 3.9% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 2 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Variable Portfolio – Moderately Aggressive Portfolio |
| 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 $20 0.39% |
| Expenses Paid, Amount | $ 20 |
| Expense Ratio, Percent | 0.39% |
| Net Assets | $ 5,963,408,783 |
| Holdings Count | Holding | 42 |
| Investment Company, Portfolio Turnover | 18% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $5,963,408,783 Total number of portfolio holdings 42 Portfolio turnover for the reporting period 18% |
| Holdings [Text Block] | Graphical Representation of Fund The tables below show the investment makeup of Top Holdings Variable Portfolio – Partners Core Bond Fund, Class 1 Shares 7.4% Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 7.3% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 6.6% Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares 6.4% Variable Portfolio – Partners Core Equity Fund, Class 1 Shares 6.3% CTIVP ® 4.9% Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares 4.5% CTIVP ® 4.4% Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares 4.0% CTIVP ® 3.9% Asset Categories |
| Largest Holdings [Text Block] | Top Holdings Variable Portfolio – Partners Core Bond Fund, Class 1 Shares 7.4% Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 7.3% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 6.6% Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares 6.4% Variable Portfolio – Partners Core Equity Fund, Class 1 Shares 6.3% CTIVP ® 4.9% Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares 4.5% CTIVP ® 4.4% Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares 4.0% CTIVP ® 3.9% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 4 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Variable Portfolio – Moderately Aggressive Portfolio |
| Class Name | Class 4 |
| 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 4 $20 0.39% |
| Expenses Paid, Amount | $ 20 |
| Expense Ratio, Percent | 0.39% |
| Net Assets | $ 5,963,408,783 |
| Holdings Count | Holding | 42 |
| Investment Company, Portfolio Turnover | 18% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $5,963,408,783 Total number of portfolio holdings 42 Portfolio turnover for the reporting period 18% |
| 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 Top Holdings Variable Portfolio – Partners Core Bond Fund, Class 1 Shares 7.4% Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 7.3% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 6.6% Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares 6.4% Variable Portfolio – Partners Core Equity Fund, Class 1 Shares 6.3% CTIVP ® 4.9% Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares 4.5% CTIVP ® 4.4% Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares 4.0% CTIVP ® 3.9% Asset Categories |
| Largest Holdings [Text Block] | Top Holdings Variable Portfolio – Partners Core Bond Fund, Class 1 Shares 7.4% Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 7.3% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 6.6% Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares 6.4% Variable Portfolio – Partners Core Equity Fund, Class 1 Shares 6.3% CTIVP ® 4.9% Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares 4.5% CTIVP ® 4.4% Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares 4.0% CTIVP ® 3.9% |
| Variable Portfolio – Aggressive Portfolio Class 1 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Variable Portfolio – Aggressive Portfolio |
| 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 $7 0.14% |
| Expenses Paid, Amount | $ 7 |
| Expense Ratio, Percent | 0.14% |
| Net Assets | $ 2,360,868,109 |
| Holdings Count | Holding | 42 |
| Investment Company, Portfolio Turnover | 22% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $2,360,868,109 Total number of portfolio holdings 42 Portfolio turnover for the reporting period 22% |
| 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 Top Holdings Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 8.2% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 8.1% Variable Portfolio – Partners Core Equity Fund, Class 1 Shares 7.2% Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares 6.5% Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares 6.4% CTIVP ® 5.5% CTIVP ® 4.8% Variable Portfolio – Partners International Growth Fund, Class 1 Shares 4.8% Variable Portfolio – Partners International Value Fund, Class 1 Shares 4.7% Columbia Variable Portfolio – Select Large Cap Value Fund, Class 1 Shares 4.3% Asset Categories |
| Largest Holdings [Text Block] | Top Holdings Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 8.2% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 8.1% Variable Portfolio – Partners Core Equity Fund, Class 1 Shares 7.2% Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares 6.5% Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares 6.4% CTIVP ® 5.5% CTIVP ® 4.8% Variable Portfolio – Partners International Growth Fund, Class 1 Shares 4.8% Variable Portfolio – Partners International Value Fund, Class 1 Shares 4.7% Columbia Variable Portfolio – Select Large Cap Value Fund, Class 1 Shares 4.3% |
| Variable Portfolio – Aggressive Portfolio Class 2 | |
| Shareholder Report [Line Items] | |
| Fund Name | Variable Portfolio – Aggressive Portfolio |
| 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 $ 0.39% |
| Expenses Paid, Amount | $ 20 |
| Expense Ratio, Percent | 0.39% |
| Net Assets | $ 2,360,868,109 |
| Holdings Count | Holding | 42 |
| Investment Company, Portfolio Turnover | 22% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 42 Portfolio turnover for the reporting period 22% |
| 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 a re Top Holdings Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 8.2% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 8.1% Variable Portfolio – Partners Core Equity Fund, Class 1 Shares 7.2% Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares 6.5% Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares 6.4% CTIVP ® 5.5% CTIVP ® 4.8% Variable Portfolio – Partners International Growth Fund, Class 1 Shares 4.8% Variable Portfolio – Partners International Value Fund, Class 1 Shares 4.7% Columbia Variable Portfolio – Select Large Cap Value Fund, Class 1 Shares 4.3% Asset Categories |
| Largest Holdings [Text Block] | Top Holdings Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 8.2% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 8.1% Variable Portfolio – Partners Core Equity Fund, Class 1 Shares 7.2% Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares 6.5% Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares 6.4% CTIVP ® 5.5% CTIVP ® 4.8% Variable Portfolio – Partners International Growth Fund, Class 1 Shares 4.8% Variable Portfolio – Partners International Value Fund, Class 1 Shares 4.7% Columbia Variable Portfolio – Select Large Cap Value Fund, Class 1 Shares 4.3% |
| Variable Portfolio – Aggressive Portfolio Class 4 | |
| Shareholder Report [Line Items] | |
| Fund Name | Variable Portfolio – Aggressive Portfolio |
| Class Name | Class 4 |
| 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 4 $ 0.39% |
| Expenses Paid, Amount | $ 20 |
| Expense Ratio, Percent | 0.39% |
| Net Assets | $ 2,360,868,109 |
| Holdings Count | Holding | 42 |
| Investment Company, Portfolio Turnover | 22% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Fund net assets $ Total number of portfolio holdings 42 Portfolio turnover for the reporting period 22% |
| 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. Der iva ves Top Holdings Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 8.2% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 8.1% Variable Portfolio – Partners Core Equity Fund, Class 1 Shares 7.2% Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares 6.5% Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares 6.4% CTIVP ® 5.5% CTIVP ® 4.8% Variable Portfolio – Partners International Growth Fund, Class 1 Shares 4.8% Variable Portfolio – Partners International Value Fund, Class 1 Shares 4.7% Columbia Variable Portfolio – Select Large Cap Value Fund, Class 1 Shares 4.3% Asset Categories |
| Largest Holdings [Text Block] | Top Holdings Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares 8.2% Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares 8.1% Variable Portfolio – Partners Core Equity Fund, Class 1 Shares 7.2% Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares 6.5% Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares 6.4% CTIVP ® 5.5% CTIVP ® 4.8% Variable Portfolio – Partners International Growth Fund, Class 1 Shares 4.8% Variable Portfolio – Partners International Value Fund, Class 1 Shares 4.7% Columbia Variable Portfolio – Select Large Cap Value Fund, Class 1 Shares 4.3% |
| Shareholder Report, Holdings (Details) | Jun. 30, 2024 |
| Variable Portfolio – Aggressive Portfolio Class 4 | Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.20% |
| Variable Portfolio – Aggressive Portfolio Class 4 | Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.10% |
| Variable Portfolio – Aggressive Portfolio Class 4 | Variable Portfolio – Partners Core Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.20% |
| Variable Portfolio – Aggressive Portfolio Class 4 | Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| Variable Portfolio – Aggressive Portfolio Class 4 | Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| Variable Portfolio – Aggressive Portfolio Class 4 | CTIVP® – Principal Blue Chip Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| Variable Portfolio – Aggressive Portfolio Class 4 | CTIVP® – Westfield Select Large Cap Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| Variable Portfolio – Aggressive Portfolio Class 4 | Variable Portfolio – Partners International Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| Variable Portfolio – Aggressive Portfolio Class 4 | Variable Portfolio – Partners International Value Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| Variable Portfolio – Aggressive Portfolio Class 4 | Columbia Variable Portfolio – Select Large Cap Value Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Variable Portfolio – Aggressive Portfolio Class 4 | Equity Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 83% |
| Variable Portfolio – Aggressive Portfolio Class 4 | Fixed Income Funds1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.70% |
| Variable Portfolio – Aggressive Portfolio Class 4 | Residential MortgageBacked Securities Agency [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| Variable Portfolio – Aggressive Portfolio Class 4 | Money Market Funds 1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Variable Portfolio – Aggressive Portfolio Class 4 | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Variable Portfolio – Aggressive Portfolio Class 2 | Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.20% |
| Variable Portfolio – Aggressive Portfolio Class 2 | Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.10% |
| Variable Portfolio – Aggressive Portfolio Class 2 | Variable Portfolio – Partners Core Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.20% |
| Variable Portfolio – Aggressive Portfolio Class 2 | Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| Variable Portfolio – Aggressive Portfolio Class 2 | Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| Variable Portfolio – Aggressive Portfolio Class 2 | CTIVP® – Principal Blue Chip Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| Variable Portfolio – Aggressive Portfolio Class 2 | CTIVP® – Westfield Select Large Cap Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| Variable Portfolio – Aggressive Portfolio Class 2 | Variable Portfolio – Partners International Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| Variable Portfolio – Aggressive Portfolio Class 2 | Variable Portfolio – Partners International Value Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| Variable Portfolio – Aggressive Portfolio Class 2 | Columbia Variable Portfolio – Select Large Cap Value Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Variable Portfolio – Aggressive Portfolio Class 2 | Equity Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 83% |
| Variable Portfolio – Aggressive Portfolio Class 2 | Fixed Income Funds1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.70% |
| Variable Portfolio – Aggressive Portfolio Class 2 | Residential MortgageBacked Securities Agency [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| Variable Portfolio – Aggressive Portfolio Class 2 | Money Market Funds 1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Variable Portfolio – Aggressive Portfolio Class 2 | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Variable Portfolio – Aggressive Portfolio Class 1 [Member] | Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.20% |
| Variable Portfolio – Aggressive Portfolio Class 1 [Member] | Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.10% |
| Variable Portfolio – Aggressive Portfolio Class 1 [Member] | Variable Portfolio – Partners Core Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.20% |
| Variable Portfolio – Aggressive Portfolio Class 1 [Member] | Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| Variable Portfolio – Aggressive Portfolio Class 1 [Member] | Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| Variable Portfolio – Aggressive Portfolio Class 1 [Member] | CTIVP® – Principal Blue Chip Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| Variable Portfolio – Aggressive Portfolio Class 1 [Member] | CTIVP® – Westfield Select Large Cap Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| Variable Portfolio – Aggressive Portfolio Class 1 [Member] | Variable Portfolio – Partners International Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| Variable Portfolio – Aggressive Portfolio Class 1 [Member] | Variable Portfolio – Partners International Value Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| Variable Portfolio – Aggressive Portfolio Class 1 [Member] | Columbia Variable Portfolio – Select Large Cap Value Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Variable Portfolio – Aggressive Portfolio Class 1 [Member] | Equity Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 83% |
| Variable Portfolio – Aggressive Portfolio Class 1 [Member] | Fixed Income Funds1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.70% |
| Variable Portfolio – Aggressive Portfolio Class 1 [Member] | Residential MortgageBacked Securities Agency [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| Variable Portfolio – Aggressive Portfolio Class 1 [Member] | Money Market Funds 1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Variable Portfolio – Aggressive Portfolio Class 1 [Member] | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 4 [Member] | Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 4 [Member] | Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.60% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 4 [Member] | Variable Portfolio – Partners Core Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 4 [Member] | Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 4 [Member] | Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 4 [Member] | CTIVP® – Principal Blue Chip Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 4 [Member] | Variable Portfolio – Partners Core Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 4 [Member] | Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 4 [Member] | CTIVP® – American Century Diversified Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 4 [Member] | CTIVP® – TCW Core Plus Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 4 [Member] | Equity Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 66.10% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 4 [Member] | Fixed Income Funds1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 4 [Member] | Residential MortgageBacked Securities Agency [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 4 [Member] | Money Market Funds 1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 4 [Member] | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 2 [Member] | Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 2 [Member] | Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.60% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 2 [Member] | Variable Portfolio – Partners Core Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 2 [Member] | Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 2 [Member] | Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 2 [Member] | CTIVP® – Principal Blue Chip Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 2 [Member] | Variable Portfolio – Partners Core Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 2 [Member] | Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 2 [Member] | CTIVP® – American Century Diversified Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 2 [Member] | CTIVP® – TCW Core Plus Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 2 [Member] | Equity Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 66.10% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 2 [Member] | Fixed Income Funds1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 2 [Member] | Residential MortgageBacked Securities Agency [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 2 [Member] | Money Market Funds 1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 2 [Member] | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 1 [Member] | Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 1 [Member] | Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.60% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 1 [Member] | Variable Portfolio – Partners Core Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 1 [Member] | Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 1 [Member] | Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 1 [Member] | CTIVP® – Principal Blue Chip Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 1 [Member] | Variable Portfolio – Partners Core Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 1 [Member] | Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 1 [Member] | CTIVP® – American Century Diversified Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 1 [Member] | CTIVP® – TCW Core Plus Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 1 [Member] | Equity Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 66.10% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 1 [Member] | Fixed Income Funds1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 27% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 1 [Member] | Residential MortgageBacked Securities Agency [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 1 [Member] | Money Market Funds 1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| Variable Portfolio – Moderately Aggressive Portfolio Class 1 [Member] | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Variable Portfolio – Moderate Portfolio Class 4 [Member] | Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Variable Portfolio – Moderate Portfolio Class 4 [Member] | Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| Variable Portfolio – Moderate Portfolio Class 4 [Member] | Variable Portfolio – Partners Core Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| Variable Portfolio – Moderate Portfolio Class 4 [Member] | Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| Variable Portfolio – Moderate Portfolio Class 4 [Member] | CTIVP® – Principal Blue Chip Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| Variable Portfolio – Moderate Portfolio Class 4 [Member] | Variable Portfolio – Partners Core Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.80% |
| Variable Portfolio – Moderate Portfolio Class 4 [Member] | Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Variable Portfolio – Moderate Portfolio Class 4 [Member] | CTIVP® – American Century Diversified Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| Variable Portfolio – Moderate Portfolio Class 4 [Member] | CTIVP® – TCW Core Plus Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| Variable Portfolio – Moderate Portfolio Class 4 [Member] | Columbia Variable Portfolio – Long Government/Credit Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| Variable Portfolio – Moderate Portfolio Class 4 [Member] | Equity Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 49.70% |
| Variable Portfolio – Moderate Portfolio Class 4 [Member] | Fixed Income Funds1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 42.90% |
| Variable Portfolio – Moderate Portfolio Class 4 [Member] | Residential MortgageBacked Securities Agency [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Variable Portfolio – Moderate Portfolio Class 4 [Member] | Money Market Funds 1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| Variable Portfolio – Moderate Portfolio Class 4 [Member] | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Variable Portfolio – Moderate Portfolio Class 2 [Member] | Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Variable Portfolio – Moderate Portfolio Class 2 [Member] | Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| Variable Portfolio – Moderate Portfolio Class 2 [Member] | Variable Portfolio – Partners Core Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| Variable Portfolio – Moderate Portfolio Class 2 [Member] | Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| Variable Portfolio – Moderate Portfolio Class 2 [Member] | CTIVP® – Principal Blue Chip Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| Variable Portfolio – Moderate Portfolio Class 2 [Member] | Variable Portfolio – Partners Core Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.80% |
| Variable Portfolio – Moderate Portfolio Class 2 [Member] | Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Variable Portfolio – Moderate Portfolio Class 2 [Member] | CTIVP® – American Century Diversified Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| Variable Portfolio – Moderate Portfolio Class 2 [Member] | CTIVP® – TCW Core Plus Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| Variable Portfolio – Moderate Portfolio Class 2 [Member] | Columbia Variable Portfolio – Long Government/Credit Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| Variable Portfolio – Moderate Portfolio Class 2 [Member] | Equity Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 49.70% |
| Variable Portfolio – Moderate Portfolio Class 2 [Member] | Fixed Income Funds1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 42.90% |
| Variable Portfolio – Moderate Portfolio Class 2 [Member] | Residential MortgageBacked Securities Agency [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Variable Portfolio – Moderate Portfolio Class 2 [Member] | Money Market Funds 1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| Variable Portfolio – Moderate Portfolio Class 2 [Member] | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Variable Portfolio – Moderate Portfolio Class 1 [Member] | Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| Variable Portfolio – Moderate Portfolio Class 1 [Member] | Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| Variable Portfolio – Moderate Portfolio Class 1 [Member] | Variable Portfolio – Partners Core Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| Variable Portfolio – Moderate Portfolio Class 1 [Member] | Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| Variable Portfolio – Moderate Portfolio Class 1 [Member] | CTIVP® – Principal Blue Chip Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| Variable Portfolio – Moderate Portfolio Class 1 [Member] | Variable Portfolio – Partners Core Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.80% |
| Variable Portfolio – Moderate Portfolio Class 1 [Member] | Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Variable Portfolio – Moderate Portfolio Class 1 [Member] | CTIVP® – American Century Diversified Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| Variable Portfolio – Moderate Portfolio Class 1 [Member] | CTIVP® – TCW Core Plus Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| Variable Portfolio – Moderate Portfolio Class 1 [Member] | Columbia Variable Portfolio – Long Government/Credit Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| Variable Portfolio – Moderate Portfolio Class 1 [Member] | Equity Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 49.70% |
| Variable Portfolio – Moderate Portfolio Class 1 [Member] | Fixed Income Funds1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 42.90% |
| Variable Portfolio – Moderate Portfolio Class 1 [Member] | Residential MortgageBacked Securities Agency [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Variable Portfolio – Moderate Portfolio Class 1 [Member] | Money Market Funds 1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| Variable Portfolio – Moderate Portfolio Class 1 [Member] | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Variable Portfolio – Moderately Conservative Portfolio Class 4 [Member] | Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Variable Portfolio – Moderately Conservative Portfolio Class 4 [Member] | Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| Variable Portfolio – Moderately Conservative Portfolio Class 4 [Member] | Variable Portfolio – Partners Core Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Variable Portfolio – Moderately Conservative Portfolio Class 4 [Member] | Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| Variable Portfolio – Moderately Conservative Portfolio Class 4 [Member] | Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Variable Portfolio – Moderately Conservative Portfolio Class 4 [Member] | Variable Portfolio – Partners Core Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.10% |
| Variable Portfolio – Moderately Conservative Portfolio Class 4 [Member] | Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.60% |
| Variable Portfolio – Moderately Conservative Portfolio Class 4 [Member] | CTIVP® – American Century Diversified Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| Variable Portfolio – Moderately Conservative Portfolio Class 4 [Member] | CTIVP® – TCW Core Plus Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.10% |
| Variable Portfolio – Moderately Conservative Portfolio Class 4 [Member] | Columbia Variable Portfolio – Disciplined Core Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Variable Portfolio – Moderately Conservative Portfolio Class 4 [Member] | Equity Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 35.10% |
| Variable Portfolio – Moderately Conservative Portfolio Class 4 [Member] | Fixed Income Funds1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 58.90% |
| Variable Portfolio – Moderately Conservative Portfolio Class 4 [Member] | Residential MortgageBacked Securities Agency [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Variable Portfolio – Moderately Conservative Portfolio Class 4 [Member] | Money Market Funds 1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Variable Portfolio – Moderately Conservative Portfolio Class 4 [Member] | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Variable Portfolio – Moderately Conservative Portfolio Class 2 [Member] | Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Variable Portfolio – Moderately Conservative Portfolio Class 2 [Member] | Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| Variable Portfolio – Moderately Conservative Portfolio Class 2 [Member] | Variable Portfolio – Partners Core Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Variable Portfolio – Moderately Conservative Portfolio Class 2 [Member] | Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| Variable Portfolio – Moderately Conservative Portfolio Class 2 [Member] | Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Variable Portfolio – Moderately Conservative Portfolio Class 2 [Member] | Variable Portfolio – Partners Core Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.10% |
| Variable Portfolio – Moderately Conservative Portfolio Class 2 [Member] | Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.60% |
| Variable Portfolio – Moderately Conservative Portfolio Class 2 [Member] | CTIVP® – American Century Diversified Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| Variable Portfolio – Moderately Conservative Portfolio Class 2 [Member] | CTIVP® – TCW Core Plus Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.10% |
| Variable Portfolio – Moderately Conservative Portfolio Class 2 [Member] | Columbia Variable Portfolio – Disciplined Core Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Variable Portfolio – Moderately Conservative Portfolio Class 2 [Member] | Equity Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 35.10% |
| Variable Portfolio – Moderately Conservative Portfolio Class 2 [Member] | Fixed Income Funds1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 58.90% |
| Variable Portfolio – Moderately Conservative Portfolio Class 2 [Member] | Residential MortgageBacked Securities Agency [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Variable Portfolio – Moderately Conservative Portfolio Class 2 [Member] | Money Market Funds 1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Variable Portfolio – Moderately Conservative Portfolio Class 2 [Member] | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Variable Portfolio – Moderately Conservative Portfolio Class 1 [Member] | Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Variable Portfolio – Moderately Conservative Portfolio Class 1 [Member] | Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| Variable Portfolio – Moderately Conservative Portfolio Class 1 [Member] | Variable Portfolio – Partners Core Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Variable Portfolio – Moderately Conservative Portfolio Class 1 [Member] | Variable Portfolio – Partners International Core Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| Variable Portfolio – Moderately Conservative Portfolio Class 1 [Member] | Columbia Variable Portfolio – Large Cap Growth Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Variable Portfolio – Moderately Conservative Portfolio Class 1 [Member] | Variable Portfolio – Partners Core Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.10% |
| Variable Portfolio – Moderately Conservative Portfolio Class 1 [Member] | Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.60% |
| Variable Portfolio – Moderately Conservative Portfolio Class 1 [Member] | CTIVP® – American Century Diversified Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| Variable Portfolio – Moderately Conservative Portfolio Class 1 [Member] | CTIVP® – TCW Core Plus Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.10% |
| Variable Portfolio – Moderately Conservative Portfolio Class 1 [Member] | Columbia Variable Portfolio – Disciplined Core Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Variable Portfolio – Moderately Conservative Portfolio Class 1 [Member] | Equity Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 35.10% |
| Variable Portfolio – Moderately Conservative Portfolio Class 1 [Member] | Fixed Income Funds1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 58.90% |
| Variable Portfolio – Moderately Conservative Portfolio Class 1 [Member] | Residential MortgageBacked Securities Agency [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Variable Portfolio – Moderately Conservative Portfolio Class 1 [Member] | Money Market Funds 1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| Variable Portfolio – Moderately Conservative Portfolio Class 1 [Member] | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Variable Portfolio – Conservative Portfolio Class 4 [Member] | Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| Variable Portfolio – Conservative Portfolio Class 4 [Member] | Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Variable Portfolio – Conservative Portfolio Class 4 [Member] | Variable Portfolio – Partners Core Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 29.30% |
| Variable Portfolio – Conservative Portfolio Class 4 [Member] | Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.40% |
| Variable Portfolio – Conservative Portfolio Class 4 [Member] | CTIVP® – American Century Diversified Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| Variable Portfolio – Conservative Portfolio Class 4 [Member] | CTIVP® – TCW Core Plus Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.90% |
| Variable Portfolio – Conservative Portfolio Class 4 [Member] | Columbia Variable Portfolio – Long Government/Credit Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Variable Portfolio – Conservative Portfolio Class 4 [Member] | Columbia Variable Portfolio – U.S. Government Mortgage Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| Variable Portfolio – Conservative Portfolio Class 4 [Member] | Columbia Variable Portfolio – Limited Duration Credit Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Variable Portfolio – Conservative Portfolio Class 4 [Member] | Uniform Mortgage-Backed Security TBA07/15/2054 5.500% [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Variable Portfolio – Conservative Portfolio Class 4 [Member] | Equity Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.90% |
| Variable Portfolio – Conservative Portfolio Class 4 [Member] | Fixed Income Funds1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 71.80% |
| Variable Portfolio – Conservative Portfolio Class 4 [Member] | Residential MortgageBacked Securities Agency [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Variable Portfolio – Conservative Portfolio Class 4 [Member] | Money Market Funds 1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.70% |
| Variable Portfolio – Conservative Portfolio Class 4 [Member] | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Variable Portfolio – Conservative Portfolio Class 2 [Member] | Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| Variable Portfolio – Conservative Portfolio Class 2 [Member] | Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Variable Portfolio – Conservative Portfolio Class 2 [Member] | Variable Portfolio – Partners Core Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 29.30% |
| Variable Portfolio – Conservative Portfolio Class 2 [Member] | Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.40% |
| Variable Portfolio – Conservative Portfolio Class 2 [Member] | CTIVP® – American Century Diversified Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| Variable Portfolio – Conservative Portfolio Class 2 [Member] | CTIVP® – TCW Core Plus Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.90% |
| Variable Portfolio – Conservative Portfolio Class 2 [Member] | Columbia Variable Portfolio – Long Government/Credit Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Variable Portfolio – Conservative Portfolio Class 2 [Member] | Columbia Variable Portfolio – U.S. Government Mortgage Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| Variable Portfolio – Conservative Portfolio Class 2 [Member] | Columbia Variable Portfolio – Limited Duration Credit Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Variable Portfolio – Conservative Portfolio Class 2 [Member] | Uniform Mortgage-Backed Security TBA07/15/2054 5.500% [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Variable Portfolio – Conservative Portfolio Class 2 [Member] | Equity Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.90% |
| Variable Portfolio – Conservative Portfolio Class 2 [Member] | Fixed Income Funds1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 71.80% |
| Variable Portfolio – Conservative Portfolio Class 2 [Member] | Residential MortgageBacked Securities Agency [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Variable Portfolio – Conservative Portfolio Class 2 [Member] | Money Market Funds 1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.70% |
| Variable Portfolio – Conservative Portfolio Class 2 [Member] | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Variable Portfolio – Conservative Portfolio Class 1 [Member] | Columbia Variable Portfolio – Overseas Core Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| Variable Portfolio – Conservative Portfolio Class 1 [Member] | Columbia Variable Portfolio – Select Large Cap Equity Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Variable Portfolio – Conservative Portfolio Class 1 [Member] | Variable Portfolio – Partners Core Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 29.30% |
| Variable Portfolio – Conservative Portfolio Class 1 [Member] | Columbia Variable Portfolio – Intermediate Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.40% |
| Variable Portfolio – Conservative Portfolio Class 1 [Member] | CTIVP® – American Century Diversified Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| Variable Portfolio – Conservative Portfolio Class 1 [Member] | CTIVP® – TCW Core Plus Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.90% |
| Variable Portfolio – Conservative Portfolio Class 1 [Member] | Columbia Variable Portfolio – Long Government/Credit Bond Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Variable Portfolio – Conservative Portfolio Class 1 [Member] | Columbia Variable Portfolio – U.S. Government Mortgage Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| Variable Portfolio – Conservative Portfolio Class 1 [Member] | Columbia Variable Portfolio – Limited Duration Credit Fund, Class 1 Shares [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Variable Portfolio – Conservative Portfolio Class 1 [Member] | Uniform Mortgage-Backed Security TBA07/15/2054 5.500% [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Variable Portfolio – Conservative Portfolio Class 1 [Member] | Equity Fund [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.90% |
| Variable Portfolio – Conservative Portfolio Class 1 [Member] | Fixed Income Funds1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 71.80% |
| Variable Portfolio – Conservative Portfolio Class 1 [Member] | Residential MortgageBacked Securities Agency [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Variable Portfolio – Conservative Portfolio Class 1 [Member] | Money Market Funds 1 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.70% |
| Variable Portfolio – Conservative Portfolio Class 1 [Member] | Other [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
