S000028691 [Member] Annual Total Returns |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| CTIVP - Westfield Mid Cap Growth Fund | Class 2 | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 10.12% | 17.19% | 25.17% | (25.79%) | 16.41% | 27.18% | 41.80% | (3.61%) | 22.65% | 3.43% |