S000028691 [Member] Expense Example, No Redemption - CTIVP - Westfield Mid Cap Growth Fund |
Dec. 31, 2025
USD ($)
|
|---|---|
| Class 1 | |
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | $ 85 |
| Expense Example, No Redemption, 3 Years | 271 |
| Expense Example, No Redemption, 5 Years | 474 |
| Expense Example, No Redemption, 10 Years | 1,058 |
| Class 2 | |
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | 110 |
| Expense Example, No Redemption, 3 Years | 350 |
| Expense Example, No Redemption, 5 Years | 609 |
| Expense Example, No Redemption, 10 Years | $ 1,349 |