| Form N-CSR Cover | 6 Months Ended |
| Jun. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Voya Variable Funds |
| Entity Central Index Key | 0000002664 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jun. 30, 2024 |
| Shareholder Report | 6 Months Ended |
| Jun. 30, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Voya Variable Funds |
| Entity Central Index Key | 0000002664 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jun. 30, 2024 |
| C000028787 | |
| Shareholder Report [Line Items] | |
| Fund Name | Voya Growth and Income Portfolio |
| Class Name | Class ADV |
| Trading Symbol | IAVGX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Voya Growth and Income 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 |
| Additional Information Phone Number | 1-800-992-0180 |
| Additional Information Website | https://individuals.voya.com/product/mutual-fund/prospectuses-reports</span>" id="sjs-B19"><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? Class Name Costs of $10K investment Costs paid as % of $10K investment Class ADV $59 1.12% |
| Expenses Paid, Amount | $ 59 |
| Expense Ratio, Percent | 1.12% |
| AssetsNet | $ 2,350,182,946 |
| Holdings Count | Holding | 71 |
| InvestmentCompanyPortfolioTurnover | 57% |
| Additional Fund Statistics [Text Block] | Fund Statistics Total Net Assets $2,350,182,946 # of Portfolio Holdings 71 Portfolio Turnover Rate 57% |
| Holdings [Text Block] | Portfolio Composition Value Value Liabilities in Excess of Other Assets (1.2)% Short-Term Investments 1.5% Common Stock 99.7% |
| Largest Holdings [Text Block] | Top 10 Holdings Microsoft Corp. 8.0% Apple, Inc. 7.6% Amazon.com, Inc. 5.4% Meta Platforms, Inc. - Class A 4.2% Broadcom, Inc. 3.6% Advanced Micro Devices, Inc. 2.6% Salesforce, Inc. 2.5% Bank of America Corp. 2.4% Taiwan Semiconductor Manufacturing Co. Ltd. 2.3% Micron Technology, Inc. 2.3% |
| Updated Prospectus Phone Number | 1-800-992-0180 |
| Updated Prospectus Web Address | https://individuals.voya.com/product/mutual-fund/prospectuses-reports |
| C000028788 | |
| Shareholder Report [Line Items] | |
| Fund Name | Voya Growth and Income Portfolio |
| Class Name | Class I |
| Trading Symbol | IIVGX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Voya Growth and Income 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 |
| Additional Information Phone Number | 1-800-992-0180 |
| Additional Information Website | https://individuals.voya.com/product/mutual-fund/prospectuses-reports</span>" id="sjs-B40"><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? Class Name Costs of $10K investment Costs paid as % of $10K investment Class I $36 0.67% |
| Expenses Paid, Amount | $ 36 |
| Expense Ratio, Percent | 0.67% |
| AssetsNet | $ 2,350,182,946 |
| Holdings Count | Holding | 71 |
| InvestmentCompanyPortfolioTurnover | 57% |
| Additional Fund Statistics [Text Block] | Fund Statistics Total Net Assets $2,350,182,946 # of Portfolio Holdings 71 Portfolio Turnover Rate 57% |
| Holdings [Text Block] | Portfolio Composition Value Value Liabilities in Excess of Other Assets (1.2)% Short-Term Investments 1.5% Common Stock 99.7% |
| Largest Holdings [Text Block] | Top 10 Holdings Microsoft Corp. 8.0% Apple, Inc. 7.6% Amazon.com, Inc. 5.4% Meta Platforms, Inc. - Class A 4.2% Broadcom, Inc. 3.6% Advanced Micro Devices, Inc. 2.6% Salesforce, Inc. 2.5% Bank of America Corp. 2.4% Taiwan Semiconductor Manufacturing Co. Ltd. 2.3% Micron Technology, Inc. 2.3% |
| Updated Prospectus Phone Number | 1-800-992-0180 |
| Updated Prospectus Web Address | https://individuals.voya.com/product/mutual-fund/prospectuses-reports |
| C000028789 | |
| Shareholder Report [Line Items] | |
| Fund Name | Voya Growth and Income Portfolio |
| Class Name | Class S |
| Trading Symbol | ISVGX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Voya Growth and Income 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 |
| Additional Information Phone Number | 1-800-992-0180 |
| Additional Information Website | https://individuals.voya.com/product/mutual-fund/prospectuses-reports</span>" id="sjs-B61"><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? Class Name Costs of $10K investment Costs paid as % of $10K investment Class S $49 0.92% |
| Expenses Paid, Amount | $ 49 |
| Expense Ratio, Percent | 0.92% |
| AssetsNet | $ 2,350,182,946 |
| Holdings Count | Holding | 71 |
| InvestmentCompanyPortfolioTurnover | 57% |
| Additional Fund Statistics [Text Block] | Fund Statistics Total Net Assets $2,350,182,946 # of Portfolio Holdings 71 Portfolio Turnover Rate 57% |
| Holdings [Text Block] | Portfolio Composition Value Value Liabilities in Excess of Other Assets (1.2)% Short-Term Investments 1.5% Common Stock 99.7% |
| Largest Holdings [Text Block] | Top 10 Holdings Microsoft Corp. 8.0% Apple, Inc. 7.6% Amazon.com, Inc. 5.4% Meta Platforms, Inc. - Class A 4.2% Broadcom, Inc. 3.6% Advanced Micro Devices, Inc. 2.6% Salesforce, Inc. 2.5% Bank of America Corp. 2.4% Taiwan Semiconductor Manufacturing Co. Ltd. 2.3% Micron Technology, Inc. 2.3% |
| Updated Prospectus Phone Number | 1-800-992-0180 |
| Updated Prospectus Web Address | https://individuals.voya.com/product/mutual-fund/prospectuses-reports |
| C000074892 | |
| Shareholder Report [Line Items] | |
| Fund Name | Voya Growth and Income Portfolio |
| Class Name | Class S2 |
| Trading Symbol | IGISX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Voya Growth and Income 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 |
| Additional Information Phone Number | 1-800-992-0180 |
| Additional Information Website | https://individuals.voya.com/product/mutual-fund/prospectuses-reports</span>" id="sjs-B82"><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? Class Name Costs of $10K investment Costs paid as % of $10K investment Class S2 $57 1.07% |
| Expenses Paid, Amount | $ 57 |
| Expense Ratio, Percent | 1.07% |
| AssetsNet | $ 2,350,182,946 |
| Holdings Count | Holding | 71 |
| InvestmentCompanyPortfolioTurnover | 57% |
| Additional Fund Statistics [Text Block] | Fund Statistics Total Net Assets $2,350,182,946 # of Portfolio Holdings 71 Portfolio Turnover Rate 57% |
| Holdings [Text Block] | Portfolio Composition Value Value Liabilities in Excess of Other Assets (1.2)% Short-Term Investments 1.5% Common Stock 99.7% |
| Largest Holdings [Text Block] | Top 10 Holdings Microsoft Corp. 8.0% Apple, Inc. 7.6% Amazon.com, Inc. 5.4% Meta Platforms, Inc. - Class A 4.2% Broadcom, Inc. 3.6% Advanced Micro Devices, Inc. 2.6% Salesforce, Inc. 2.5% Bank of America Corp. 2.4% Taiwan Semiconductor Manufacturing Co. Ltd. 2.3% Micron Technology, Inc. 2.3% |
| Updated Prospectus Phone Number | 1-800-992-0180 |
| Updated Prospectus Web Address | https://individuals.voya.com/product/mutual-fund/prospectuses-reports |
| Shareholder Report, Holdings (Details) | Jun. 30, 2024 |
| C000028787 | Microsoft Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| C000028787 | Apple, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| C000028787 | Amazon.com, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| C000028787 | Meta Platforms, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000028787 | Broadcom, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000028787 | Advanced Micro Devices, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000028787 | Salesforce, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000028787 | Bank of America Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000028787 | Taiwan Semiconductor Manufacturing Co. Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000028787 | Micron Technology, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000028787 | Information Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 33.70% |
| C000028787 | Health Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.80% |
| C000028787 | Consumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.10% |
| C000028787 | Financials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.90% |
| C000028787 | Industrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.20% |
| C000028787 | Communication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| C000028787 | Consumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| C000028787 | Utilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000028787 | Energy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000028787 | Materials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000028787 | Real Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000028787 | Other_Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (1.20%) |
| C000028787 | Other_Portfolio | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (1.20%) |
| C000028787 | Investment_SecurityTypeCode_Repurchase Agreements | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| C000028787 | Investment_SecurityTypeCode_Common Stock | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.70% |
| C000028788 | Microsoft Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| C000028788 | Apple, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| C000028788 | Amazon.com, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| C000028788 | Meta Platforms, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000028788 | Broadcom, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000028788 | Advanced Micro Devices, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000028788 | Salesforce, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000028788 | Bank of America Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000028788 | Taiwan Semiconductor Manufacturing Co. Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000028788 | Micron Technology, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000028788 | Information Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 33.70% |
| C000028788 | Health Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.80% |
| C000028788 | Consumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.10% |
| C000028788 | Financials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.90% |
| C000028788 | Industrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.20% |
| C000028788 | Communication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| C000028788 | Consumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| C000028788 | Utilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000028788 | Energy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000028788 | Materials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000028788 | Real Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000028788 | Other_Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (1.20%) |
| C000028788 | Other_Portfolio | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (1.20%) |
| C000028788 | Investment_SecurityTypeCode_Repurchase Agreements | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| C000028788 | Investment_SecurityTypeCode_Common Stock | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.70% |
| C000028789 | Microsoft Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| C000028789 | Apple, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| C000028789 | Amazon.com, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| C000028789 | Meta Platforms, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000028789 | Broadcom, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000028789 | Advanced Micro Devices, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000028789 | Salesforce, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000028789 | Bank of America Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000028789 | Taiwan Semiconductor Manufacturing Co. Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000028789 | Micron Technology, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000028789 | Information Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 33.70% |
| C000028789 | Health Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.80% |
| C000028789 | Consumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.10% |
| C000028789 | Financials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.90% |
| C000028789 | Industrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.20% |
| C000028789 | Communication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| C000028789 | Consumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| C000028789 | Utilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000028789 | Energy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000028789 | Materials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000028789 | Real Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000028789 | Other_Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (1.20%) |
| C000028789 | Other_Portfolio | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (1.20%) |
| C000028789 | Investment_SecurityTypeCode_Repurchase Agreements | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| C000028789 | Investment_SecurityTypeCode_Common Stock | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.70% |
| C000074892 | Microsoft Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| C000074892 | Apple, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| C000074892 | Amazon.com, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.40% |
| C000074892 | Meta Platforms, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000074892 | Broadcom, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000074892 | Advanced Micro Devices, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000074892 | Salesforce, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000074892 | Bank of America Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000074892 | Taiwan Semiconductor Manufacturing Co. Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000074892 | Micron Technology, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000074892 | Information Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 33.70% |
| C000074892 | Health Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.80% |
| C000074892 | Consumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.10% |
| C000074892 | Financials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.90% |
| C000074892 | Industrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.20% |
| C000074892 | Communication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| C000074892 | Consumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| C000074892 | Utilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000074892 | Energy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000074892 | Materials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000074892 | Real Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000074892 | Other_Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (1.20%) |
| C000074892 | Other_Portfolio | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (1.20%) |
| C000074892 | Investment_SecurityTypeCode_Repurchase Agreements | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| C000074892 | Investment_SecurityTypeCode_Common Stock | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.70% |
