| Form N-CSR Cover | 6 Months Ended |
| Jun. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Transamerica Funds |
| Entity Central Index Key | 0000787623 |
| 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 | Transamerica Funds |
| Entity Central Index Key | 0000787623 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jun. 30, 2024 |
| C000171784 | |
| Shareholder Report [Line Items] | |
| Fund Name | Transamerica Stock Index |
| Class Name | Class R |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information 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 transamerica.com/investments/mutual-fund-prospectus 888-233-4339 |
| Additional Information Phone Number | 888-233-4339</span>" id="sjs-B17"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">888-233-4339</span> |
| Additional Information Website | <span style="text-decoration: underline solid rgb(0, 0, 0); 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;">transamerica.com/investments/mutual-fund-prospectus</span></span>" id="sjs-B18"><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;"><span style="text-decoration: underline solid rgb(0, 0, 0); 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;">transamerica.com/investments/mutual-fund-prospectus</span></span> |
| Expenses [Text Block] | What were the Fund costs for the period? Fund Overview Operating Expenses (based on a hypothetical $10,000 investment) Class Name Cost of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R $33 0.62% |
| Expenses Paid, Amount | $ 33 |
| Expense Ratio, Percent | 0.62% |
| AssetsNet | $ 341,743,207 |
| Holdings Count | Holding | 1 |
| InvestmentCompanyPortfolioTurnover | 4% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $341,743,207 Number of Portfolio Holdings 1 Portfolio Turnover Rate 4% |
| Holdings [Text Block] | Top Asset Allocations (Percentage of Net Assets) S&P 500 Index Master Portfolio 100.0% Net Other Assets (Liabilities) 0.0 Footnote Reference Footnote Description Footnote * Percentage rounds to less than 0.1% or (0.1)%. |
| Largest Holdings [Text Block] | |
| Updated Prospectus Phone Number | 888-233-4339</span>" id="sjs-B28"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">888-233-4339</span> |
| Updated Prospectus Web Address | <span style="text-decoration: underline solid rgb(0, 0, 0); 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;">transamerica.com/investments/mutual-fund-prospectus</span></span>" id="sjs-B29"><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;"><span style="text-decoration: underline solid rgb(0, 0, 0); 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;">transamerica.com/investments/mutual-fund-prospectus</span></span> |
| C000171785 | |
| Shareholder Report [Line Items] | |
| Fund Name | Transamerica Stock Index |
| Class Name | Class R4 |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information 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 transamerica.com/investments/mutual-fund-prospectus 888-233-4339 |
| Additional Information Phone Number | 888-233-4339</span>" id="sjs-B37"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">888-233-4339</span> |
| Additional Information Website | <span style="text-decoration: underline solid rgb(0, 0, 0); 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;">transamerica.com/investments/mutual-fund-prospectus</span></span>" id="sjs-B38"><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;"><span style="text-decoration: underline solid rgb(0, 0, 0); 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;">transamerica.com/investments/mutual-fund-prospectus</span></span> |
| Expenses [Text Block] | What were the Fund costs for the period? Fund Overview Operating Expenses (based on a hypothetical $10,000 investment) Class Name Cost of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R4 $16 0.30% |
| Expenses Paid, Amount | $ 16 |
| Expense Ratio, Percent | 0.30% |
| AssetsNet | $ 341,743,207 |
| Holdings Count | Holding | 1 |
| InvestmentCompanyPortfolioTurnover | 4% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $341,743,207 Number of Portfolio Holdings 1 Portfolio Turnover Rate 4% |
| Holdings [Text Block] | Top Asset Allocations (Percentage of Net Assets) S&P 500 Index Master Portfolio 100.0% Net Other Assets (Liabilities) 0.0 Footnote Reference Footnote Description Footnote * Percentage rounds to less than 0.1% or (0.1)%. |
| Largest Holdings [Text Block] | |
| Updated Prospectus Phone Number | 888-233-4339</span>" id="sjs-B48"><span style="font-weight: 700; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">888-233-4339</span> |
| Updated Prospectus Web Address | <span style="text-decoration: underline solid rgb(0, 0, 0); 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;">transamerica.com/investments/mutual-fund-prospectus</span></span>" id="sjs-B49"><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;"><span style="text-decoration: underline solid rgb(0, 0, 0); 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;">transamerica.com/investments/mutual-fund-prospectus</span></span> |
| Shareholder Report, Holdings (Details) - AssetS&P 500 Index Master Portfolio | Jun. 30, 2024 |
| C000171784 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 100% |
| C000171785 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 100% |
