v3.26.1
Shareholder Report
 6 Months Ended
Jun. 30, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Voya Variable Insurance Trust
Entity Central Index Key 0001090682
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2026
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
C000152054  
Shareholder Report [Line Items]  
Fund Name VY<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 9px; font-weight: 400; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> BrandywineGLOBAL- Bond Portfolio
Class Name Portfolio
Trading Symbol VGSBX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about VY® BrandywineGLOBAL- Bond Portfolio for the period of January 1, 2026 to June 30, 2026.
Additional Information Phone Number 1-800-992-0180
Expenses [Text Block]

What were the Fund’s costs for the last six months?  (based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of $10K investment
Costs paid as % of $10K investment (Annualized)
Portfolio
$27
0.55%
Expenses Paid, Amount $ 27
Expense Ratio, Percent 0.55%
AssetsNet $ 222,291,402
Holdings Count | Holding 88
InvestmentCompanyPortfolioTurnover 165.00%
Additional Fund Statistics [Text Block]

Fund Statistics 

  • Total Net Assets$222,291,402
  • # of Portfolio Holdings88
  • Portfolio Turnover Rate165%
Holdings [Text Block]

Investment Type Allocation

A graphical representation of Investments made.
Table Summary
Value
Value
Assets in Excess of Other Liabilities
2.4%
Commercial Mortgage-Backed Securities
2.7%
Asset-Backed Securities
6.4%
Corporate Bonds/Notes
7.4%
Collateralized Mortgage Obligations
10.7%
U.S. Government Agency Obligations
27.0%
U.S. Treasury Obligations
43.4%
Largest Holdings [Text Block]

Top 10 Holdings 

Table Summary
United States Treasury Notes, 4.125%, 05/31/31
28.2%
United States Treasury Notes, 4.250%, 08/15/35
5.4%
United States Treasury Inflation Indexed Bonds, 2.375%, 02/15/56
4.8%
Federal Home Loan Banks, 4.250%, 09/11/26
3.6%
Ginnie Mae, 6.000%, 01/20/56
2.5%
Federal Home Loan Banks, 3.625%, 09/04/26
2.3%
United States Treasury Bonds, 4.750%, 05/15/55
2.1%
United States Treasury Floating Rate Notes, 3.875%, 01/31/28
2.1%
Ginnie Mae, 5.500%, 07/20/55
2.1%
Ginnie Mae, 6.000%, 11/20/53
1.9%