This semi-annual shareholder report contains important information about Voya MidCap Opportunities Portfolio for the period of January 1, 2024 to June 30, 2024.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at https://individuals.voya.com/product/mutual-fund/prospectuses-reports. You can also request this information by contacting us at 1-800-992-0180.

Additional Information Phone Number

1-800-992-0180

Additional Information Website

<span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">https://individuals.voya.com/product/mutual-fund/prospectuses-reports</span>

Expenses [Text Block]

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

Class Name	Costs of $10K investment	Costs paid as % of $10K investment
Class ADV	$61	1.19%

Expenses Paid, Amount

$ 61

Expense Ratio, Percent

1.19%

AssetsNet

$ 1,086,907,094

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

38.00%

Additional Fund Statistics [Text Block]

Fund Statistics

Total Net Assets$1,086,907,094
# of Portfolio Holdings87
Portfolio Turnover Rate38%

Holdings [Text Block]

Portfolio Composition

A graphical representation of Investments made.

Value	Value
Liabilities in Excess of Other Assets	(0.1)%
Short-Term Investments	1.5%
Common Stock	98.6%

Largest Holdings [Text Block]

Top 10 Holdings

Ross Stores, Inc.	3.3%
Datadog, Inc. - Class A	3.2%
Trade Desk, Inc. - Class A	2.7%
Verisk Analytics, Inc.	2.7%
Monolithic Power Systems, Inc.	2.7%
LPL Financial Holdings, Inc.	2.3%
Royal Caribbean Cruises Ltd.	2.2%
Dexcom, Inc.	2.1%
Pinterest, Inc. - Class A	2.1%
AmerisourceBergen Corp.	2.1%

C000023591

Shareholder Report [Line Items]

Fund Name

Voya MidCap Opportunities Portfolio

Class Name

Class I

Trading Symbol

IIMOX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Voya MidCap Opportunities Portfolio for the period of January 1, 2024 to June 30, 2024.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at https://individuals.voya.com/product/mutual-fund/prospectuses-reports. You can also request this information by contacting us at 1-800-992-0180.

Additional Information Phone Number

1-800-992-0180

Additional Information Website

Expenses [Text Block]

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

Class Name	Costs of $10K investment	Costs paid as % of $10K investment
Class I	$35	0.69%

Expenses Paid, Amount

$ 35

Expense Ratio, Percent

0.69%

AssetsNet

$ 1,086,907,094

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

38.00%

Additional Fund Statistics [Text Block]

Fund Statistics

Total Net Assets$1,086,907,094
# of Portfolio Holdings87
Portfolio Turnover Rate38%

Holdings [Text Block]

Portfolio Composition

Value	Value
Liabilities in Excess of Other Assets	(0.1)%
Short-Term Investments	1.5%
Common Stock	98.6%

Largest Holdings [Text Block]

Top 10 Holdings

Ross Stores, Inc.	3.3%
Datadog, Inc. - Class A	3.2%
Trade Desk, Inc. - Class A	2.7%
Verisk Analytics, Inc.	2.7%
Monolithic Power Systems, Inc.	2.7%
LPL Financial Holdings, Inc.	2.3%
Royal Caribbean Cruises Ltd.	2.2%
Dexcom, Inc.	2.1%
Pinterest, Inc. - Class A	2.1%
AmerisourceBergen Corp.	2.1%

C000163133

Shareholder Report [Line Items]

Fund Name

Voya MidCap Opportunities Portfolio

Class Name

Class R6

Trading Symbol

VMCRX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Voya MidCap Opportunities Portfolio for the period of January 1, 2024 to June 30, 2024.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at https://individuals.voya.com/product/mutual-fund/prospectuses-reports. You can also request this information by contacting us at 1-800-992-0180.

Additional Information Phone Number

1-800-992-0180

Additional Information Website

Expenses [Text Block]

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

Class Name	Costs of $10K investment	Costs paid as % of $10K investment
Class R6	$35	0.69%

Expenses Paid, Amount

$ 35

Expense Ratio, Percent

0.69%

AssetsNet

$ 1,086,907,094

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

38.00%

Additional Fund Statistics [Text Block]

Fund Statistics

Total Net Assets$1,086,907,094
# of Portfolio Holdings87
Portfolio Turnover Rate38%

Holdings [Text Block]

Portfolio Composition

Value	Value
Liabilities in Excess of Other Assets	(0.1)%
Short-Term Investments	1.5%
Common Stock	98.6%

Largest Holdings [Text Block]

Top 10 Holdings

Ross Stores, Inc.	3.3%
Datadog, Inc. - Class A	3.2%
Trade Desk, Inc. - Class A	2.7%
Verisk Analytics, Inc.	2.7%
Monolithic Power Systems, Inc.	2.7%
LPL Financial Holdings, Inc.	2.3%
Royal Caribbean Cruises Ltd.	2.2%
Dexcom, Inc.	2.1%
Pinterest, Inc. - Class A	2.1%
AmerisourceBergen Corp.	2.1%

C000023592

Shareholder Report [Line Items]

Fund Name

Voya MidCap Opportunities Portfolio

Class Name

Class S

Trading Symbol

ISMOX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Voya MidCap Opportunities Portfolio for the period of January 1, 2024 to June 30, 2024.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at https://individuals.voya.com/product/mutual-fund/prospectuses-reports. You can also request this information by contacting us at 1-800-992-0180.

Additional Information Phone Number

1-800-992-0180

Additional Information Website

Expenses [Text Block]

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

Class Name	Costs of $10K investment	Costs paid as % of $10K investment
Class S	$48	0.94%

Expenses Paid, Amount

$ 48

Expense Ratio, Percent

0.94%

AssetsNet

$ 1,086,907,094

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

38.00%

Additional Fund Statistics [Text Block]

Fund Statistics

Total Net Assets$1,086,907,094
# of Portfolio Holdings87
Portfolio Turnover Rate38%

Holdings [Text Block]

Portfolio Composition

Value	Value
Liabilities in Excess of Other Assets	(0.1)%
Short-Term Investments	1.5%
Common Stock	98.6%

Largest Holdings [Text Block]

Top 10 Holdings

Ross Stores, Inc.	3.3%
Datadog, Inc. - Class A	3.2%
Trade Desk, Inc. - Class A	2.7%
Verisk Analytics, Inc.	2.7%
Monolithic Power Systems, Inc.	2.7%
LPL Financial Holdings, Inc.	2.3%
Royal Caribbean Cruises Ltd.	2.2%
Dexcom, Inc.	2.1%
Pinterest, Inc. - Class A	2.1%
AmerisourceBergen Corp.	2.1%

C000074884

Shareholder Report [Line Items]

Fund Name

Voya MidCap Opportunities Portfolio

Class Name

Class S2

Trading Symbol

IMOPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Voya MidCap Opportunities Portfolio for the period of January 1, 2024 to June 30, 2024.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at https://individuals.voya.com/product/mutual-fund/prospectuses-reports. You can also request this information by contacting us at 1-800-992-0180.

Additional Information Phone Number

1-800-992-0180

Additional Information Website

Expenses [Text Block]

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

Class Name	Costs of $10K investment	Costs paid as % of $10K investment
Class S2	$56	1.09%

Expenses Paid, Amount

$ 56

Expense Ratio, Percent

1.09%

AssetsNet

$ 1,086,907,094

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

38.00%

Additional Fund Statistics [Text Block]

Fund Statistics

Total Net Assets$1,086,907,094
# of Portfolio Holdings87
Portfolio Turnover Rate38%

Holdings [Text Block]

Portfolio Composition

Value	Value
Liabilities in Excess of Other Assets	(0.1)%
Short-Term Investments	1.5%
Common Stock	98.6%

Largest Holdings [Text Block]

Top 10 Holdings

Ross Stores, Inc.	3.3%
Datadog, Inc. - Class A	3.2%
Trade Desk, Inc. - Class A	2.7%
Verisk Analytics, Inc.	2.7%
Monolithic Power Systems, Inc.	2.7%
LPL Financial Holdings, Inc.	2.3%
Royal Caribbean Cruises Ltd.	2.2%
Dexcom, Inc.	2.1%
Pinterest, Inc. - Class A	2.1%
AmerisourceBergen Corp.	2.1%

C000073995

Shareholder Report [Line Items]

Fund Name

Voya SmallCap Opportunities Portfolio

Class Name

Class ADV

Trading Symbol

ISOPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Voya SmallCap Opportunities Portfolio for the period of January 1, 2024 to June 30, 2024.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at https://individuals.voya.com/product/mutual-fund/prospectuses-reports. You can also request this information by contacting us at 1-800-992-0180.

Additional Information Phone Number

1-800-992-0180

Additional Information Website

Expenses [Text Block]

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

Class Name	Costs of $10K investment	Costs paid as % of $10K investment
Class ADV	$71	1.35%

Expenses Paid, Amount

$ 71

Expense Ratio, Percent

1.35%

AssetsNet

$ 213,752,728

Holdings Count | Holding

109

InvestmentCompanyPortfolioTurnover

53.00%

Additional Fund Statistics [Text Block]

Fund Statistics

Total Net Assets$213,752,728
# of Portfolio Holdings109
Portfolio Turnover Rate53%

Holdings [Text Block]

Portfolio Composition

Value	Value
Liabilities in Excess of Other Assets	(3.8)%
Short-Term Investments	4.7%
Exchange-Traded Funds	1.4%
Common Stock	97.7%

Largest Holdings [Text Block]

Top 10 Holdings

Churchill Downs, Inc.	3.0%
Natera, Inc.	2.9%
Littelfuse, Inc.	2.5%
FTAI Aviation Ltd.	2.4%
ExlService Holdings, Inc.	1.8%
Piper Sandler Cos.	1.8%
Casella Waste Systems, Inc. - Class A	1.7%
Clean Harbors, Inc.	1.7%
Universal Display Corp.	1.7%
Skyline Champion Corp.	1.7%

C000023597

Shareholder Report [Line Items]

Fund Name

Voya SmallCap Opportunities Portfolio

Class Name

Class I

Trading Symbol

IVSOX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Voya SmallCap Opportunities Portfolio for the period of January 1, 2024 to June 30, 2024.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at https://individuals.voya.com/product/mutual-fund/prospectuses-reports. You can also request this information by contacting us at 1-800-992-0180.

Additional Information Phone Number

1-800-992-0180

Additional Information Website

Expenses [Text Block]

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

Class Name	Costs of $10K investment	Costs paid as % of $10K investment
Class I	$45	0.85%

Expenses Paid, Amount

$ 45

Expense Ratio, Percent

0.85%

AssetsNet

$ 213,752,728

Holdings Count | Holding

109

InvestmentCompanyPortfolioTurnover

53.00%

Additional Fund Statistics [Text Block]

Fund Statistics

Total Net Assets$213,752,728
# of Portfolio Holdings109
Portfolio Turnover Rate53%

Holdings [Text Block]

Portfolio Composition

Value	Value
Liabilities in Excess of Other Assets	(3.8)%
Short-Term Investments	4.7%
Exchange-Traded Funds	1.4%
Common Stock	97.7%

Largest Holdings [Text Block]

Top 10 Holdings

Churchill Downs, Inc.	3.0%
Natera, Inc.	2.9%
Littelfuse, Inc.	2.5%
FTAI Aviation Ltd.	2.4%
ExlService Holdings, Inc.	1.8%
Piper Sandler Cos.	1.8%
Casella Waste Systems, Inc. - Class A	1.7%
Clean Harbors, Inc.	1.7%
Universal Display Corp.	1.7%
Skyline Champion Corp.	1.7%

Updated Prospectus Phone Number

1-800-992-0180

Updated Prospectus Web Address

https://individuals.voya.com/product/mutual-fund/prospectuses-reports

C000163134

Shareholder Report [Line Items]

Fund Name

Voya SmallCap Opportunities Portfolio

Class Name

Class R6

Trading Symbol

VRSCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Voya SmallCap Opportunities Portfolio for the period of January 1, 2024 to June 30, 2024.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at https://individuals.voya.com/product/mutual-fund/prospectuses-reports. You can also request this information by contacting us at 1-800-992-0180.

Additional Information Phone Number

1-800-992-0180

Additional Information Website

Expenses [Text Block]

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

Class Name	Costs of $10K investment	Costs paid as % of $10K investment
Class R6	$45	0.85%

Expenses Paid, Amount

$ 45

Expense Ratio, Percent

0.85%

AssetsNet

$ 213,752,728

Holdings Count | Holding

109

InvestmentCompanyPortfolioTurnover

53.00%

Additional Fund Statistics [Text Block]

Fund Statistics

Total Net Assets$213,752,728
# of Portfolio Holdings109
Portfolio Turnover Rate53%

Holdings [Text Block]

Portfolio Composition

Value	Value
Liabilities in Excess of Other Assets	(3.8)%
Short-Term Investments	4.7%
Exchange-Traded Funds	1.4%
Common Stock	97.7%

Largest Holdings [Text Block]

Top 10 Holdings

Churchill Downs, Inc.	3.0%
Natera, Inc.	2.9%
Littelfuse, Inc.	2.5%
FTAI Aviation Ltd.	2.4%
ExlService Holdings, Inc.	1.8%
Piper Sandler Cos.	1.8%
Casella Waste Systems, Inc. - Class A	1.7%
Clean Harbors, Inc.	1.7%
Universal Display Corp.	1.7%
Skyline Champion Corp.	1.7%

C000023598

Shareholder Report [Line Items]

Fund Name

Voya SmallCap Opportunities Portfolio

Class Name

Class S

Trading Symbol

IVPOX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Voya SmallCap Opportunities Portfolio for the period of January 1, 2024 to June 30, 2024.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at https://individuals.voya.com/product/mutual-fund/prospectuses-reports. You can also request this information by contacting us at 1-800-992-0180.

Additional Information Phone Number

1-800-992-0180

Additional Information Website

Expenses [Text Block]

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

Class Name	Costs of $10K investment	Costs paid as % of $10K investment
Class S	$58	1.10%

Expenses Paid, Amount

$ 58

Expense Ratio, Percent

1.10%

AssetsNet

$ 213,752,728

Holdings Count | Holding

109

InvestmentCompanyPortfolioTurnover

53.00%

Additional Fund Statistics [Text Block]

Fund Statistics

Total Net Assets$213,752,728
# of Portfolio Holdings109
Portfolio Turnover Rate53%

Holdings [Text Block]

Portfolio Composition

Value	Value
Liabilities in Excess of Other Assets	(3.8)%
Short-Term Investments	4.7%
Exchange-Traded Funds	1.4%
Common Stock	97.7%

Largest Holdings [Text Block]

Top 10 Holdings

Churchill Downs, Inc.	3.0%
Natera, Inc.	2.9%
Littelfuse, Inc.	2.5%
FTAI Aviation Ltd.	2.4%
ExlService Holdings, Inc.	1.8%
Piper Sandler Cos.	1.8%
Casella Waste Systems, Inc. - Class A	1.7%
Clean Harbors, Inc.	1.7%
Universal Display Corp.	1.7%
Skyline Champion Corp.	1.7%

C000074885

Shareholder Report [Line Items]

Fund Name

Voya SmallCap Opportunities Portfolio

Class Name

Class S2

Trading Symbol

ISCTX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Voya SmallCap Opportunities Portfolio for the period of January 1, 2024 to June 30, 2024.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at https://individuals.voya.com/product/mutual-fund/prospectuses-reports. You can also request this information by contacting us at 1-800-992-0180.

Additional Information Phone Number

1-800-992-0180

Additional Information Website

Expenses [Text Block]

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

Class Name	Costs of $10K investment	Costs paid as % of $10K investment
Class S2	$66	1.25%

Expenses Paid, Amount

$ 66

Expense Ratio, Percent

1.25%

AssetsNet

$ 213,752,728

Holdings Count | Holding

109

InvestmentCompanyPortfolioTurnover

53.00%

Additional Fund Statistics [Text Block]

Fund Statistics

Total Net Assets$213,752,728
# of Portfolio Holdings109
Portfolio Turnover Rate53%

Holdings [Text Block]

Portfolio Composition

Value	Value
Liabilities in Excess of Other Assets	(3.8)%
Short-Term Investments	4.7%
Exchange-Traded Funds	1.4%
Common Stock	97.7%

Largest Holdings [Text Block]

Top 10 Holdings

Churchill Downs, Inc.	3.0%
Natera, Inc.	2.9%
Littelfuse, Inc.	2.5%
FTAI Aviation Ltd.	2.4%
ExlService Holdings, Inc.	1.8%
Piper Sandler Cos.	1.8%
Casella Waste Systems, Inc. - Class A	1.7%
Clean Harbors, Inc.	1.7%
Universal Display Corp.	1.7%
Skyline Champion Corp.	1.7%