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

Form N-CSR Cover

Form N-CSR Cover	6 Months Ended
	Jun. 30, 2024
Shareholder Report [Line Items]
Document Type	N-CSRS
Amendment Flag	false
Registrant Name	Columbia Funds Variable Series Trust II
Entity Central Index Key	0001413032
Entity Investment Company Type	N-1A
Document Period End Date	Jun. 30, 2024

Shareholder Report

Shareholder Report	6 Months Ended
	Jun. 30, 2024 USD ($) Holding
Shareholder Report [Line Items]
Document Type	N-CSRS
Amendment Flag	false
Registrant Name	Columbia Funds Variable Series Trust II
Entity Central Index Key	0001413032
Entity Investment Company Type	N-1A
Document Period End Date	Jun. 30, 2024
Variable Portfolio - Partners Core Equity Fund Class 3
Shareholder Report [Line Items]
Fund Name	Variable Portfolio – Partners Core Equity Fund
Class Name	Class 3
No Trading Symbol Flag	true
Annual or Semi-Annual Statement [Text Block]	This semiannual shareholder report
Shareholder Report Annual or Semi-Annual	semi-annual shareholder report
Additional Information [Text Block]	You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature 1-800-345-6611.
Additional Information Phone Number	1-800-345-6611
Additional Information Website	columbiathreadneedleus.com/resources/literature
Expenses [Text Block]	What were the Fund costs for the reporting period? (Based on a hypothetical $10,000 investment) Class Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class 3 $ 0.81%
Expenses Paid, Amount	$ 44
Expense Ratio, Percent	0.81%
Net Assets	$ 2,955,724,353
Holdings Count | Holding	115
Investment Company, Portfolio Turnover	26%
Additional Fund Statistics [Text Block]	Key Fund Statistics Fund net assets $ Total number of portfolio holdings 115 Portfolio turnover for the reporting period 26%
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 Microsoft Corp. 8.7% NVIDIA Corp. 7.3% Apple, Inc. 6.4% Amazon.com, Inc. 4.4% Alphabet, Inc., Class C 2.3% UnitedHealth Group, Inc. 2.1% AbbVie, Inc. 1.6% Alphabet, Inc., Class A 1.6% CSX Corp. 1.6% NXP Semiconductors NV 1.6% Asset Categories Equity Sector Allocation
Largest Holdings [Text Block]	Top Holdings Microsoft Corp. 8.7% NVIDIA Corp. 7.3% Apple, Inc. 6.4% Amazon.com, Inc. 4.4% Alphabet, Inc., Class C 2.3% UnitedHealth Group, Inc. 2.1% AbbVie, Inc. 1.6% Alphabet, Inc., Class A 1.6% CSX Corp. 1.6% NXP Semiconductors NV 1.6%
Variable Portfolio - Partners Core Equity Fund Class 2
Shareholder Report [Line Items]
Fund Name	Variable Portfolio – Partners Core Equity 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 $ 0.93%
Expenses Paid, Amount	$ 50
Expense Ratio, Percent	0.93%
Net Assets	$ 2,955,724,353
Holdings Count | Holding	115
Investment Company, Portfolio Turnover	26%
Additional Fund Statistics [Text Block]	Key Fund Statistics Fund net assets $ Total number of portfolio holdings 115 Portfolio turnover for the reporting period 26%
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 Microsoft Corp. 8.7% NVIDIA Corp. 7.3% Apple, Inc. 6.4% Amazon.com, Inc. 4.4% Alphabet, Inc., Class C 2.3% UnitedHealth Group, Inc. 2.1% AbbVie, Inc. 1.6% Alphabet, Inc., Class A 1.6% CSX Corp. 1.6% NXP Semiconductors NV 1.6% Asset Categories Equity Sector Allocation
Largest Holdings [Text Block]	Top Holdings Microsoft Corp. 8.7% NVIDIA Corp. 7.3% Apple, Inc. 6.4% Amazon.com, Inc. 4.4% Alphabet, Inc., Class C 2.3% UnitedHealth Group, Inc. 2.1% AbbVie, Inc. 1.6% Alphabet, Inc., Class A 1.6% CSX Corp. 1.6% NXP Semiconductors NV 1.6%
Variable Portfolio - Partners Core Equity Fund Class 1
Shareholder Report [Line Items]
Fund Name	Variable Portfolio – Partners Core Equity 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 $ 0.68%
Expenses Paid, Amount	$ 37
Expense Ratio, Percent	0.68%
Net Assets	$ 2,955,724,353
Holdings Count | Holding	115
Investment Company, Portfolio Turnover	26%
Additional Fund Statistics [Text Block]	Key Fund Statistics Fund net assets $ Total number of portfolio holdings 115 Portfolio turnover for the reporting period 26%
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 Microsoft Corp. 8.7% NVIDIA Corp. 7.3% Apple, Inc. 6.4% Amazon.com, Inc. 4.4% Alphabet, Inc., Class C 2.3% UnitedHealth Group, Inc. 2.1% AbbVie, Inc. 1.6% Alphabet, Inc., Class A 1.6% CSX Corp. 1.6% NXP Semiconductors NV 1.6% Asset Categories Equity Sector Allocation
Largest Holdings [Text Block]	Top Holdings Microsoft Corp. 8.7% NVIDIA Corp. 7.3% Apple, Inc. 6.4% Amazon.com, Inc. 4.4% Alphabet, Inc., Class C 2.3% UnitedHealth Group, Inc. 2.1% AbbVie, Inc. 1.6% Alphabet, Inc., Class A 1.6% CSX Corp. 1.6% NXP Semiconductors NV 1.6%

Shareholder Report, Holdings (D

Shareholder Report, Holdings (Details)	Jun. 30, 2024
Variable Portfolio - Partners Core Equity Fund Class 3 | Microsoft Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.70%
Variable Portfolio - Partners Core Equity Fund Class 3 | NVIDIA Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.30%
Variable Portfolio - Partners Core Equity Fund Class 3 | Apple, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.40%
Variable Portfolio - Partners Core Equity Fund Class 3 | Amazon.com, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.40%
Variable Portfolio - Partners Core Equity Fund Class 3 | Alphabet, Inc., Class C [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.30%
Variable Portfolio - Partners Core Equity Fund Class 3 | UnitedHealth Group, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.10%
Variable Portfolio - Partners Core Equity Fund Class 3 | AbbVie, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.60%
Variable Portfolio - Partners Core Equity Fund Class 3 | Alphabet, Inc., Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.60%
Variable Portfolio - Partners Core Equity Fund Class 3 | CSX Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.60%
Variable Portfolio - Partners Core Equity Fund Class 3 | NXP Semiconductors NV [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.60%
Variable Portfolio - Partners Core Equity Fund Class 3 | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	32.90%
Variable Portfolio - Partners Core Equity Fund Class 3 | Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.60%
Variable Portfolio - Partners Core Equity Fund Class 3 | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.40%
Variable Portfolio - Partners Core Equity Fund Class 3 | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.90%
Variable Portfolio - Partners Core Equity Fund Class 3 | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.30%
Variable Portfolio - Partners Core Equity Fund Class 3 | Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7%
Variable Portfolio - Partners Core Equity Fund Class 3 | Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.10%
Variable Portfolio - Partners Core Equity Fund Class 3 | Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.80%
Variable Portfolio - Partners Core Equity Fund Class 3 | Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Variable Portfolio - Partners Core Equity Fund Class 3 | Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.50%
Variable Portfolio - Partners Core Equity Fund Class 3 | Other [Member]
Holdings [Line Items]
Percent of Net Asset Value	1%
Variable Portfolio - Partners Core Equity Fund Class 3 | Common Stock [Member]
Holdings [Line Items]
Percent of Net Asset Value	99.90%
Variable Portfolio - Partners Core Equity Fund Class 3 | Other Security Investments [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%
Variable Portfolio - Partners Core Equity Fund Class 2 | Microsoft Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.70%
Variable Portfolio - Partners Core Equity Fund Class 2 | NVIDIA Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.30%
Variable Portfolio - Partners Core Equity Fund Class 2 | Apple, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.40%
Variable Portfolio - Partners Core Equity Fund Class 2 | Amazon.com, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.40%
Variable Portfolio - Partners Core Equity Fund Class 2 | Alphabet, Inc., Class C [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.30%
Variable Portfolio - Partners Core Equity Fund Class 2 | UnitedHealth Group, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.10%
Variable Portfolio - Partners Core Equity Fund Class 2 | AbbVie, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.60%
Variable Portfolio - Partners Core Equity Fund Class 2 | Alphabet, Inc., Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.60%
Variable Portfolio - Partners Core Equity Fund Class 2 | CSX Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.60%
Variable Portfolio - Partners Core Equity Fund Class 2 | NXP Semiconductors NV [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.60%
Variable Portfolio - Partners Core Equity Fund Class 2 | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	32.90%
Variable Portfolio - Partners Core Equity Fund Class 2 | Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.60%
Variable Portfolio - Partners Core Equity Fund Class 2 | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.40%
Variable Portfolio - Partners Core Equity Fund Class 2 | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.90%
Variable Portfolio - Partners Core Equity Fund Class 2 | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.30%
Variable Portfolio - Partners Core Equity Fund Class 2 | Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7%
Variable Portfolio - Partners Core Equity Fund Class 2 | Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.10%
Variable Portfolio - Partners Core Equity Fund Class 2 | Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.80%
Variable Portfolio - Partners Core Equity Fund Class 2 | Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Variable Portfolio - Partners Core Equity Fund Class 2 | Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.50%
Variable Portfolio - Partners Core Equity Fund Class 2 | Other [Member]
Holdings [Line Items]
Percent of Net Asset Value	1%
Variable Portfolio - Partners Core Equity Fund Class 2 | Common Stock [Member]
Holdings [Line Items]
Percent of Net Asset Value	99.90%
Variable Portfolio - Partners Core Equity Fund Class 2 | Other Security Investments [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%
Variable Portfolio - Partners Core Equity Fund Class 1 | Microsoft Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.70%
Variable Portfolio - Partners Core Equity Fund Class 1 | NVIDIA Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.30%
Variable Portfolio - Partners Core Equity Fund Class 1 | Apple, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.40%
Variable Portfolio - Partners Core Equity Fund Class 1 | Amazon.com, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.40%
Variable Portfolio - Partners Core Equity Fund Class 1 | Alphabet, Inc., Class C [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.30%
Variable Portfolio - Partners Core Equity Fund Class 1 | UnitedHealth Group, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.10%
Variable Portfolio - Partners Core Equity Fund Class 1 | AbbVie, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.60%
Variable Portfolio - Partners Core Equity Fund Class 1 | Alphabet, Inc., Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.60%
Variable Portfolio - Partners Core Equity Fund Class 1 | CSX Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.60%
Variable Portfolio - Partners Core Equity Fund Class 1 | NXP Semiconductors NV [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.60%
Variable Portfolio - Partners Core Equity Fund Class 1 | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	32.90%
Variable Portfolio - Partners Core Equity Fund Class 1 | Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.60%
Variable Portfolio - Partners Core Equity Fund Class 1 | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.40%
Variable Portfolio - Partners Core Equity Fund Class 1 | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.90%
Variable Portfolio - Partners Core Equity Fund Class 1 | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.30%
Variable Portfolio - Partners Core Equity Fund Class 1 | Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7%
Variable Portfolio - Partners Core Equity Fund Class 1 | Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.10%
Variable Portfolio - Partners Core Equity Fund Class 1 | Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.80%
Variable Portfolio - Partners Core Equity Fund Class 1 | Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Variable Portfolio - Partners Core Equity Fund Class 1 | Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.50%
Variable Portfolio - Partners Core Equity Fund Class 1 | Other [Member]
Holdings [Line Items]
Percent of Net Asset Value	1%
Variable Portfolio - Partners Core Equity Fund Class 1 | Common Stock [Member]
Holdings [Line Items]
Percent of Net Asset Value	99.90%
Variable Portfolio - Partners Core Equity Fund Class 1 | Other Security Investments [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%