Shareholder Report

12 Months Ended

Dec. 31, 2024

USD ($)

Holding

Shareholder Report [Line Items]

Document Type

N-CSR

Amendment Flag

false

Registrant Name

Voya Variable Insurance Trust

Entity Central Index Key

0001090682

Entity Investment Company Type

N-1A

Document Period End Date

Dec. 31, 2024

C000152054

Shareholder Report [Line Items]

Fund Name

VY<sup style="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;">®</sup> BrandywineGLOBAL- Bond Portfolio

Class Name

Portfolio

Trading Symbol

VGSBX

Annual or Semi-Annual Statement [Text Block]

This annual shareholder report contains important information about VY^® BrandywineGLOBAL- Bond Portfolio for the period of January 1, 2024 to December 31, 2024.

Shareholder Report Annual or Semi-Annual

Annual Shareholder Report

Additional Information Phone Number

1-800-992-0180

Expenses [Text Block]

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

Class Name	Costs of $10K investment	Costs paid as % of $10K investment
Portfolio	$58	0.58%

Expenses Paid, Amount

$ 58

Expense Ratio, Percent

0.58%

Factors Affecting Performance [Text Block]

How did the Fund perform in the past 12 months?

For the year ended December 31, 2024, the Fund underperformed the Bloomberg U.S. Aggregate Bond Index.

↑ Top contributors to performance: Contributing to performance was spread movement and yield profile.  An overweight allocation to agency MBS contributed positively.   Also, an overweight to investment grade corporates in the consumer cyclical, energy and financial sectors added to performance.

↓ Top detractors from performance: An overweight position in portfolio duration via US Treasuries detracted from performance.  An underweight to investment grade corporates also detracted from relative performance.

Line Graph [Table Text Block]

	Portfolio	Bloomberg U.S. Aggregate Bond Index
2/20/2015	$10,000	$10,000
2015	$10,020	$10,007
2016	$10,290	$10,337
2017	$10,592	$10,703
2018	$10,417	$10,704
2019	$11,471	$11,637
2020	$13,475	$12,511
2021	$13,631	$12,319
2022	$12,010	$10,716
2023	$12,673	$11,308
2024	$12,776	$11,450

Average Annual Return [Table Text Block]

Fund	1 Year	5 Years	Since Inception (2/20/2015)
Portfolio	0.81%	2.18%	2.52%
Bloomberg U.S. Aggregate Bond Index	1.25%	-0.33%	1.32%

AssetsNet

$ 213,835,708

Holdings Count | Holding

51

InvestmentCompanyPortfolioTurnover

127.00%

Additional Fund Statistics [Text Block]

Fund Statistics 

• Total Net Assets$213,835,708
• # of Portfolio Holdings51
• Portfolio Turnover Rate127%
• Investment Advisory Fees Paid$1,091,349

Holdings [Text Block]

Investment Type Allocation

Value	Value
Assets in Excess of Other Liabilities	3.1%
Corporate Bonds/Notes	7.7%
U.S. Treasury Obligations	32.2%
U.S. Government Agency Obligations	57.0%

Largest Holdings [Text Block]

Top 10 Holdings 

United States Treasury Bonds, 3.000%, 08/15/52	11.2%
United States Treasury Notes, 3.875%, 08/15/34	9.7%
United States Treasury Floating Rate Notes, 4.481%, 10/31/26	8.2%
Federal National Mortgage Association, 0.500%, 11/07/25	5.6%
Federal Home Loan Mortgage Corp., 0.375%, 07/21/25	5.2%
Federal Home Loan Banks, 3.625%, 09/04/26	4.9%
Ginnie Mae, 6.000%, 09/20/54	4.2%
Ginnie Mae, 6.000%, 07/20/54	4.1%
Ginnie Mae, 6.000%, 08/20/54	2.9%
Ginnie Mae, 5.500%, 09/20/54	2.8%

Material Fund Change [Text Block]