| Form N-CSR Cover | 12 Months Ended |
| Dec. 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | DEUTSCHE DWS INVESTMENTS VIT FUNDS |
| Entity Central Index Key | 0001006373 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Dec. 31, 2024 |
| Shareholder Report | 12 Months Ended |
| Dec. 31, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | DEUTSCHE DWS INVESTMENTS VIT FUNDS |
| Entity Central Index Key | 0001006373 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Dec. 31, 2024 |
| C000017156 | |
| Shareholder Report [Line Items] | |
| Fund Name | DWS Small Cap Index VIP |
| Class Name | Class A |
| No Trading Symbol [Flag] | true |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about DWS Small Cap Index VIP (the "Fund") for the period January 1, 2024 to December 31, 2024. |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund on the Fund's website at dws.com/vipreports |
| Additional Information Phone Number | (800) 728-3337 |
| Additional Information Website | dws.com/vipreports</span>" id="sjs-B19"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 14.6667px; font-weight: 300; grid-area: auto; line-height: 17.6px; margin: 0px; overflow: visible; text-align: left;">dws.com/vipreports</span> |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $40 0.38% Gross expense ratio as of the latest prospectus: 0.42%. See prospectus for any contractual or voluntary waivers; without a waiver, costs would have been higher. Fund costs do not reflect any fees or sales charges imposed by a variable contract for which the Fund is an investment option. |
| Expenses Paid, Amount | $ 40 |
| Expense Ratio, Percent | 0.38% |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor or guarantee of the Fund's future performance. |
| Line Graph [Table Text Block] | Class A Russell 3000 ® Russell 2000 ® '14 $10,000 $10,000 $10,000 '15 $9,677 $9,722 $9,678 '15 $10,254 $10,285 $10,253 '15 $10,427 $10,180 $10,432 '15 $10,163 $10,226 $10,166 '15 $10,389 $10,368 $10,398 '15 $10,464 $10,194 $10,475 '15 $10,345 $10,365 $10,354 '15 $9,691 $9,739 $9,703 '15 $9,214 $9,455 $9,227 '15 $9,729 $10,202 $9,747 '15 $10,043 $10,258 $10,064 '15 $9,540 $10,048 $9,559 '16 $8,698 $9,481 $8,718 '16 $8,692 $9,478 $8,718 '16 $9,390 $10,145 $9,413 '16 $9,537 $10,208 $9,561 '16 $9,751 $10,391 $9,777 '16 $9,737 $10,412 $9,770 '16 $10,322 $10,825 $10,354 '16 $10,501 $10,853 $10,537 '16 $10,611 $10,870 $10,654 '16 $10,101 $10,635 $10,148 '16 $11,230 $11,111 $11,279 '16 $11,546 $11,327 $11,595 '17 $11,588 $11,541 $11,641 '17 $11,808 $11,970 $11,866 '17 $11,822 $11,978 $11,881 '17 $11,945 $12,105 $12,012 '17 $11,700 $12,229 $11,767 '17 $12,104 $12,339 $12,174 '17 $12,190 $12,572 $12,264 '17 $12,032 $12,596 $12,108 '17 $12,782 $12,903 $12,864 '17 $12,883 $13,185 $12,974 '17 $13,259 $13,585 $13,348 '17 $13,201 $13,721 $13,294 '18 $13,547 $14,444 $13,641 '18 $13,013 $13,912 $13,113 '18 $13,179 $13,633 $13,283 '18 $13,292 $13,684 $13,397 '18 $14,098 $14,071 $14,211 '18 $14,200 $14,163 $14,312 '18 $14,443 $14,633 $14,562 '18 $15,061 $15,147 $15,190 '18 $14,701 $15,172 $14,824 '18 $13,096 $14,055 $13,214 '18 $13,300 $14,336 $13,424 '18 $11,719 $13,002 $11,830 '19 $13,034 $14,118 $13,160 '19 $13,715 $14,614 $13,845 '19 $13,425 $14,828 $13,555 '19 $13,879 $15,420 $14,015 '19 $12,789 $14,422 $12,925 '19 $13,697 $15,435 $13,839 '19 $13,766 $15,664 $13,918 '19 $13,092 $15,345 $13,231 '19 $13,360 $15,614 $13,507 '19 $13,706 $15,950 $13,862 '19 $14,268 $16,557 $14,433 '19 $14,674 $17,035 $14,849 '20 $14,207 $17,016 $14,373 '20 $13,005 $15,623 $13,163 '20 $10,169 $13,475 $10,303 '20 $11,549 $15,259 $11,718 '20 $12,295 $16,075 $12,481 '20 $12,728 $16,443 $12,922 '20 $13,081 $17,376 $13,280 '20 $13,817 $18,635 $14,028 '20 $13,343 $17,957 $13,559 '20 $13,625 $17,569 $13,843 '20 $16,135 $19,706 $16,395 '20 $17,525 $20,593 $17,813 '21 $18,433 $20,501 $18,709 '21 $19,571 $21,142 $19,876 '21 $19,753 $21,900 $20,075 '21 $20,153 $23,029 $20,497 '21 $20,196 $23,134 $20,539 '21 $20,584 $23,705 $20,937 '21 $19,830 $24,105 $20,181 '21 $20,272 $24,793 $20,632 '21 $19,669 $23,680 $20,024 '21 $20,498 $25,282 $20,876 '21 $19,636 $24,897 $20,006 '21 $20,067 $25,877 $20,453 '22 $18,128 $24,355 $18,484 '22 $18,322 $23,741 $18,681 '22 $18,538 $24,512 $18,914 '22 $16,701 $22,312 $17,039 '22 $16,728 $22,282 $17,065 '22 $15,335 $20,418 $15,661 '22 $16,938 $22,333 $17,296 '22 $16,596 $21,500 $16,942 '22 $15,006 $19,506 $15,319 '22 $16,649 $21,106 $17,005 '22 $17,030 $22,208 $17,402 '22 $15,926 $20,907 $16,273 '23 $17,477 $22,347 $17,859 '23 $17,188 $21,825 $17,557 '23 $16,360 $22,408 $16,718 '23 $16,071 $22,647 $16,418 '23 $15,921 $22,735 $16,266 '23 $17,203 $24,288 $17,589 '23 $18,254 $25,158 $18,664 '23 $17,326 $24,673 $17,731 '23 $16,303 $23,497 $16,687 '23 $15,198 $22,875 $15,549 '23 $16,562 $25,008 $16,956 '23 $18,595 $26,334 $19,028 '24 $17,858 $26,626 $18,288 '24 $18,868 $28,067 $19,322 '24 $19,536 $28,973 $20,013 '24 $18,163 $27,698 $18,605 '24 $19,060 $29,006 $19,538 '24 $18,889 $29,904 $19,357 '24 $20,797 $30,460 $21,324 '24 $20,498 $31,123 $21,006 '24 $20,626 $31,767 $21,152 '24 $20,327 $31,534 $20,847 '24 $22,548 $33,632 $23,134 '24 $20,669 $32,604 $21,223 |
| Average Annual Return [Table Text Block] | Class/Index 1-Year 5-Year 10-Year Class A 11.15% 7.09% 7.53% Russell 3000 ® 23.81% 13.86% 12.55% Russell 2000 ® 11.54% 7.40% 7.82% |
| No Deduction of Taxes [Text Block] | The performance graph and returns table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares. |
| AssetsNet | $ 422,320,581 |
| Holdings Count | Holding | 1,981 |
| Advisory Fees Paid, Amount | $ 972,838 |
| InvestmentCompanyPortfolioTurnover | 20% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets ($) 422,320,581 Number of Portfolio Holdings 1,981 Portfolio Turnover Rate (%) 20 Total Net Advisory Fees Paid ($) 972,838 |
| Holdings [Text Block] | Asset Allocation Asset Type % of Net Assets Common Stocks 99% Cash Equivalents 1% Government & Agency Obligations 0% Rights 0% Other Investments 0% Warrants 0% Other Assets and Liabilities, Net 0% Total 100% Sector Allocation Sector % of Net Assets Financials 18% Industrials 18% Health Care 16% Information Technology 14% Consumer Discretionary 9% Real Estate 6% Energy 5% Materials 4% Consumer Staples 3% Utilities 3% Communication Services 3% |
| Material Fund Change [Text Block] | |
| C000017157 | |
| Shareholder Report [Line Items] | |
| Fund Name | DWS Small Cap Index VIP |
| Class Name | Class B |
| No Trading Symbol [Flag] | true |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about DWS Small Cap Index VIP (the "Fund") for the period January 1, 2024 to December 31, 2024. |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund on the Fund's website at dws.com/vipreports |
| Additional Information Phone Number | (800) 728-3337 |
| Additional Information Website | dws.com/vipreports</span>" id="sjs-B43"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 14.6667px; font-weight: 300; grid-area: auto; line-height: 17.6px; margin: 0px; overflow: visible; text-align: left;">dws.com/vipreports</span> |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class B $72 0.68% Gross expense ratio as of the latest prospectus: 0.73%. See prospectus for any contractual or voluntary waivers; without a waiver, costs would have been higher. Fund costs do not reflect any fees or sales charges imposed by a variable contract for which the Fund is an investment option. |
| Expenses Paid, Amount | $ 72 |
| Expense Ratio, Percent | 0.68% |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor or guarantee of the Fund's future performance. |
| Line Graph [Table Text Block] | Class B Russell 3000 ® Russell 2000 ® '14 $10,000 $10,000 $10,000 '15 $9,676 $9,722 $9,678 '15 $10,248 $10,285 $10,253 '15 $10,422 $10,180 $10,432 '15 $10,154 $10,226 $10,166 '15 $10,380 $10,368 $10,398 '15 $10,455 $10,194 $10,475 '15 $10,330 $10,365 $10,354 '15 $9,671 $9,739 $9,703 '15 $9,195 $9,455 $9,227 '15 $9,703 $10,202 $9,747 '15 $10,016 $10,258 $10,064 '15 $9,515 $10,048 $9,559 '16 $8,668 $9,481 $8,718 '16 $8,668 $9,478 $8,718 '16 $9,358 $10,145 $9,413 '16 $9,499 $10,208 $9,561 '16 $9,711 $10,391 $9,777 '16 $9,704 $10,412 $9,770 '16 $10,279 $10,825 $10,354 '16 $10,457 $10,853 $10,537 '16 $10,560 $10,870 $10,654 '16 $10,053 $10,635 $10,148 '16 $11,176 $11,111 $11,279 '16 $11,485 $11,327 $11,595 '17 $11,526 $11,541 $11,641 '17 $11,738 $11,970 $11,866 '17 $11,752 $11,978 $11,881 '17 $11,878 $12,105 $12,012 '17 $11,628 $12,229 $11,767 '17 $12,022 $12,339 $12,174 '17 $12,108 $12,572 $12,264 '17 $11,950 $12,596 $12,108 '17 $12,688 $12,903 $12,864 '17 $12,795 $13,185 $12,974 '17 $13,153 $13,585 $13,348 '17 $13,096 $13,721 $13,294 '18 $13,433 $14,444 $13,641 '18 $12,910 $13,912 $13,113 '18 $13,075 $13,633 $13,283 '18 $13,181 $13,684 $13,397 '18 $13,972 $14,071 $14,211 '18 $14,072 $14,163 $14,312 '18 $14,313 $14,633 $14,562 '18 $14,917 $15,147 $15,190 '18 $14,553 $15,172 $14,824 '18 $12,964 $14,055 $13,214 '18 $13,166 $14,336 $13,424 '18 $11,600 $13,002 $11,830 '19 $12,895 $14,118 $13,160 '19 $13,569 $14,614 $13,845 '19 $13,274 $14,828 $13,555 '19 $13,717 $15,420 $14,015 '19 $12,642 $14,422 $12,925 '19 $13,538 $15,435 $13,839 '19 $13,606 $15,664 $13,918 '19 $12,932 $15,345 $13,231 '19 $13,197 $15,614 $13,507 '19 $13,538 $15,950 $13,862 '19 $14,084 $16,557 $14,433 '19 $14,486 $17,035 $14,849 '20 $14,016 $17,016 $14,373 '20 $12,838 $15,623 $13,163 '20 $10,030 $13,475 $10,303 '20 $11,388 $15,259 $11,718 '20 $12,122 $16,075 $12,481 '20 $12,539 $16,443 $12,922 '20 $12,886 $17,376 $13,280 '20 $13,600 $18,635 $14,028 '20 $13,144 $17,957 $13,559 '20 $13,412 $17,569 $13,843 '20 $15,882 $19,706 $16,395 '20 $17,251 $20,593 $17,813 '21 $18,124 $20,501 $18,709 '21 $19,245 $21,142 $19,876 '21 $19,423 $21,900 $20,075 '21 $19,814 $23,029 $20,497 '21 $19,845 $23,134 $20,539 '21 $20,226 $23,705 $20,937 '21 $19,486 $24,105 $20,181 '21 $19,909 $24,793 $20,632 '21 $19,306 $23,680 $20,024 '21 $20,120 $25,282 $20,876 '21 $19,274 $24,897 $20,006 '21 $19,697 $25,877 $20,453 '22 $17,784 $24,355 $18,484 '22 $17,963 $23,741 $18,681 '22 $18,175 $24,512 $18,914 '22 $16,367 $22,312 $17,039 '22 $16,380 $22,282 $17,065 '22 $15,030 $20,418 $15,661 '22 $16,599 $22,333 $17,296 '22 $16,252 $21,500 $16,942 '22 $14,683 $19,506 $15,319 '22 $16,290 $21,106 $17,005 '22 $16,663 $22,208 $17,402 '22 $15,583 $20,907 $16,273 '23 $17,100 $22,347 $17,859 '23 $16,804 $21,825 $17,557 '23 $15,994 $22,408 $16,718 '23 $15,705 $22,647 $16,418 '23 $15,546 $22,735 $16,266 '23 $16,810 $24,288 $17,589 '23 $17,821 $25,158 $18,664 '23 $16,916 $24,673 $17,731 '23 $15,918 $23,497 $16,687 '23 $14,827 $22,875 $15,549 '23 $16,158 $25,008 $16,956 '23 $18,128 $26,334 $19,028 '24 $17,422 $26,626 $18,288 '24 $18,394 $28,067 $19,322 '24 $19,046 $28,973 $20,013 '24 $17,692 $27,698 $18,605 '24 $18,578 $29,006 $19,538 '24 $18,398 $29,904 $19,357 '24 $20,253 $30,460 $21,324 '24 $19,949 $31,123 $21,006 '24 $20,073 $31,767 $21,152 '24 $19,769 $31,534 $20,847 '24 $21,929 $33,632 $23,134 '24 $20,101 $32,604 $21,223 |
| Average Annual Return [Table Text Block] | Class/Index 1-Year 5-Year 10-Year Class B 10.89% 6.77% 7.23% Russell 3000 ® 23.81% 13.86% 12.55% Russell 2000 ® 11.54% 7.40% 7.82% |
| No Deduction of Taxes [Text Block] | The performance graph and returns table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares. |
| AssetsNet | $ 422,320,581 |
| Holdings Count | Holding | 1,981 |
| Advisory Fees Paid, Amount | $ 972,838 |
| InvestmentCompanyPortfolioTurnover | 20% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets ($) 422,320,581 Number of Portfolio Holdings 1,981 Portfolio Turnover Rate (%) 20 Total Net Advisory Fees Paid ($) 972,838 |
| Holdings [Text Block] | Asset Allocation Asset Type % of Net Assets Common Stocks 99% Cash Equivalents 1% Government & Agency Obligations 0% Rights 0% Other Investments 0% Warrants 0% Other Assets and Liabilities, Net 0% Total 100% Sector Allocation Sector % of Net Assets Financials 18% Industrials 18% Health Care 16% Information Technology 14% Consumer Discretionary 9% Real Estate 6% Energy 5% Materials 4% Consumer Staples 3% Utilities 3% Communication Services 3% |
| Material Fund Change [Text Block] |
| Shareholder Report, Line Graph (Details) - USD ($) | 12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Dec. 31, 2024 | Nov. 30, 2024 | Oct. 31, 2024 | Sep. 30, 2024 | Aug. 31, 2024 | Jul. 31, 2024 | Jun. 30, 2024 | May 31, 2024 | Apr. 30, 2024 | Mar. 31, 2024 | Feb. 29, 2024 | Jan. 31, 2024 | Dec. 31, 2023 | Nov. 30, 2023 | Oct. 31, 2023 | Sep. 30, 2023 | Aug. 31, 2023 | Jul. 31, 2023 | Jun. 30, 2023 | May 31, 2023 | Apr. 30, 2023 | Mar. 31, 2023 | Feb. 28, 2023 | Jan. 31, 2023 | Dec. 31, 2022 | Nov. 30, 2022 | Oct. 31, 2022 | Sep. 30, 2022 | Aug. 31, 2022 | Jul. 31, 2022 | Jun. 30, 2022 | May 31, 2022 | Apr. 30, 2022 | Mar. 31, 2022 | Feb. 28, 2022 | Jan. 31, 2022 | Dec. 31, 2021 | Nov. 30, 2021 | Oct. 31, 2021 | Sep. 30, 2021 | Aug. 31, 2021 | Jul. 31, 2021 | Jun. 30, 2021 | May 31, 2021 | Apr. 30, 2021 | Mar. 31, 2021 | Feb. 28, 2021 | Jan. 31, 2021 | Dec. 31, 2020 | Nov. 30, 2020 | Oct. 31, 2020 | Sep. 30, 2020 | Aug. 31, 2020 | Jul. 31, 2020 | Jun. 30, 2020 | May 31, 2020 | Apr. 30, 2020 | Mar. 31, 2020 | Feb. 29, 2020 | Jan. 31, 2020 | Dec. 31, 2019 | Nov. 30, 2019 | Oct. 31, 2019 | Sep. 30, 2019 | Aug. 31, 2019 | Jul. 31, 2019 | Jun. 30, 2019 | May 31, 2019 | Apr. 30, 2019 | Mar. 31, 2019 | Feb. 28, 2019 | Jan. 31, 2019 | Dec. 31, 2018 | Nov. 30, 2018 | Oct. 31, 2018 | Sep. 30, 2018 | Aug. 31, 2018 | Jul. 31, 2018 | Jun. 30, 2018 | May 31, 2018 | Apr. 30, 2018 | Mar. 31, 2018 | Feb. 28, 2018 | Jan. 31, 2018 | Dec. 31, 2017 | Nov. 30, 2017 | Oct. 31, 2017 | Sep. 30, 2017 | Aug. 31, 2017 | Jul. 31, 2017 | Jun. 30, 2017 | May 31, 2017 | Apr. 30, 2017 | Mar. 31, 2017 | Feb. 28, 2017 | Jan. 31, 2017 | Dec. 31, 2016 | Nov. 30, 2016 | Oct. 31, 2016 | Sep. 30, 2016 | Aug. 31, 2016 | Jul. 31, 2016 | Jun. 30, 2016 | May 31, 2016 | Apr. 30, 2016 | Mar. 31, 2016 | Feb. 29, 2016 | Jan. 31, 2016 | Dec. 31, 2015 | Nov. 30, 2015 | Oct. 31, 2015 | Sep. 30, 2015 | Aug. 31, 2015 | Jul. 31, 2015 | Jun. 30, 2015 | May 31, 2015 | Apr. 30, 2015 | Mar. 31, 2015 | Feb. 28, 2015 | Jan. 31, 2015 | Dec. 31, 2014 | |
| C000017156 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class A | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 20,669 | $ 22,548 | $ 20,327 | $ 20,626 | $ 20,498 | $ 20,797 | $ 18,889 | $ 19,060 | $ 18,163 | $ 19,536 | $ 18,868 | $ 17,858 | $ 18,595 | $ 16,562 | $ 15,198 | $ 16,303 | $ 17,326 | $ 18,254 | $ 17,203 | $ 15,921 | $ 16,071 | $ 16,360 | $ 17,188 | $ 17,477 | $ 15,926 | $ 17,030 | $ 16,649 | $ 15,006 | $ 16,596 | $ 16,938 | $ 15,335 | $ 16,728 | $ 16,701 | $ 18,538 | $ 18,322 | $ 18,128 | $ 20,067 | $ 19,636 | $ 20,498 | $ 19,669 | $ 20,272 | $ 19,830 | $ 20,584 | $ 20,196 | $ 20,153 | $ 19,753 | $ 19,571 | $ 18,433 | $ 17,525 | $ 16,135 | $ 13,625 | $ 13,343 | $ 13,817 | $ 13,081 | $ 12,728 | $ 12,295 | $ 11,549 | $ 10,169 | $ 13,005 | $ 14,207 | $ 14,674 | $ 14,268 | $ 13,706 | $ 13,360 | $ 13,092 | $ 13,766 | $ 13,697 | $ 12,789 | $ 13,879 | $ 13,425 | $ 13,715 | $ 13,034 | $ 11,719 | $ 13,300 | $ 13,096 | $ 14,701 | $ 15,061 | $ 14,443 | $ 14,200 | $ 14,098 | $ 13,292 | $ 13,179 | $ 13,013 | $ 13,547 | $ 13,201 | $ 13,259 | $ 12,883 | $ 12,782 | $ 12,032 | $ 12,190 | $ 12,104 | $ 11,700 | $ 11,945 | $ 11,822 | $ 11,808 | $ 11,588 | $ 11,546 | $ 11,230 | $ 10,101 | $ 10,611 | $ 10,501 | $ 10,322 | $ 9,737 | $ 9,751 | $ 9,537 | $ 9,390 | $ 8,692 | $ 8,698 | $ 9,540 | $ 10,043 | $ 9,729 | $ 9,214 | $ 9,691 | $ 10,345 | $ 10,464 | $ 10,389 | $ 10,163 | $ 10,427 | $ 10,254 | $ 9,677 | $ 10,000 |
| C000017157 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Class B | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 20,101 | 21,929 | 19,769 | 20,073 | 19,949 | 20,253 | 18,398 | 18,578 | 17,692 | 19,046 | 18,394 | 17,422 | 18,128 | 16,158 | 14,827 | 15,918 | 16,916 | 17,821 | 16,810 | 15,546 | 15,705 | 15,994 | 16,804 | 17,100 | 15,583 | 16,663 | 16,290 | 14,683 | 16,252 | 16,599 | 15,030 | 16,380 | 16,367 | 18,175 | 17,963 | 17,784 | 19,697 | 19,274 | 20,120 | 19,306 | 19,909 | 19,486 | 20,226 | 19,845 | 19,814 | 19,423 | 19,245 | 18,124 | 17,251 | 15,882 | 13,412 | 13,144 | 13,600 | 12,886 | 12,539 | 12,122 | 11,388 | 10,030 | 12,838 | 14,016 | 14,486 | 14,084 | 13,538 | 13,197 | 12,932 | 13,606 | 13,538 | 12,642 | 13,717 | 13,274 | 13,569 | 12,895 | 11,600 | 13,166 | 12,964 | 14,553 | 14,917 | 14,313 | 14,072 | 13,972 | 13,181 | 13,075 | 12,910 | 13,433 | 13,096 | 13,153 | 12,795 | 12,688 | 11,950 | 12,108 | 12,022 | 11,628 | 11,878 | 11,752 | 11,738 | 11,526 | 11,485 | 11,176 | 10,053 | 10,560 | 10,457 | 10,279 | 9,704 | 9,711 | 9,499 | 9,358 | 8,668 | 8,668 | 9,515 | 10,016 | 9,703 | 9,195 | 9,671 | 10,330 | 10,455 | 10,380 | 10,154 | 10,422 | 10,248 | 9,676 | 10,000 |
| DWS Index: Russell 3000® Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | 32,604 | 33,632 | 31,534 | 31,767 | 31,123 | 30,460 | 29,904 | 29,006 | 27,698 | 28,973 | 28,067 | 26,626 | 26,334 | 25,008 | 22,875 | 23,497 | 24,673 | 25,158 | 24,288 | 22,735 | 22,647 | 22,408 | 21,825 | 22,347 | 20,907 | 22,208 | 21,106 | 19,506 | 21,500 | 22,333 | 20,418 | 22,282 | 22,312 | 24,512 | 23,741 | 24,355 | 25,877 | 24,897 | 25,282 | 23,680 | 24,793 | 24,105 | 23,705 | 23,134 | 23,029 | 21,900 | 21,142 | 20,501 | 20,593 | 19,706 | 17,569 | 17,957 | 18,635 | 17,376 | 16,443 | 16,075 | 15,259 | 13,475 | 15,623 | 17,016 | 17,035 | 16,557 | 15,950 | 15,614 | 15,345 | 15,664 | 15,435 | 14,422 | 15,420 | 14,828 | 14,614 | 14,118 | 13,002 | 14,336 | 14,055 | 15,172 | 15,147 | 14,633 | 14,163 | 14,071 | 13,684 | 13,633 | 13,912 | 14,444 | 13,721 | 13,585 | 13,185 | 12,903 | 12,596 | 12,572 | 12,339 | 12,229 | 12,105 | 11,978 | 11,970 | 11,541 | 11,327 | 11,111 | 10,635 | 10,870 | 10,853 | 10,825 | 10,412 | 10,391 | 10,208 | 10,145 | 9,478 | 9,481 | 10,048 | 10,258 | 10,202 | 9,455 | 9,739 | 10,365 | 10,194 | 10,368 | 10,226 | 10,180 | 10,285 | 9,722 | 10,000 |
| DWS Index: Russell 3000® Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | 32,604 | 33,632 | 31,534 | 31,767 | 31,123 | 30,460 | 29,904 | 29,006 | 27,698 | 28,973 | 28,067 | 26,626 | 26,334 | 25,008 | 22,875 | 23,497 | 24,673 | 25,158 | 24,288 | 22,735 | 22,647 | 22,408 | 21,825 | 22,347 | 20,907 | 22,208 | 21,106 | 19,506 | 21,500 | 22,333 | 20,418 | 22,282 | 22,312 | 24,512 | 23,741 | 24,355 | 25,877 | 24,897 | 25,282 | 23,680 | 24,793 | 24,105 | 23,705 | 23,134 | 23,029 | 21,900 | 21,142 | 20,501 | 20,593 | 19,706 | 17,569 | 17,957 | 18,635 | 17,376 | 16,443 | 16,075 | 15,259 | 13,475 | 15,623 | 17,016 | 17,035 | 16,557 | 15,950 | 15,614 | 15,345 | 15,664 | 15,435 | 14,422 | 15,420 | 14,828 | 14,614 | 14,118 | 13,002 | 14,336 | 14,055 | 15,172 | 15,147 | 14,633 | 14,163 | 14,071 | 13,684 | 13,633 | 13,912 | 14,444 | 13,721 | 13,585 | 13,185 | 12,903 | 12,596 | 12,572 | 12,339 | 12,229 | 12,105 | 11,978 | 11,970 | 11,541 | 11,327 | 11,111 | 10,635 | 10,870 | 10,853 | 10,825 | 10,412 | 10,391 | 10,208 | 10,145 | 9,478 | 9,481 | 10,048 | 10,258 | 10,202 | 9,455 | 9,739 | 10,365 | 10,194 | 10,368 | 10,226 | 10,180 | 10,285 | 9,722 | 10,000 |
| DWS Index: Russell 2000® Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | 21,223 | 23,134 | 20,847 | 21,152 | 21,006 | 21,324 | 19,357 | 19,538 | 18,605 | 20,013 | 19,322 | 18,288 | 19,028 | 16,956 | 15,549 | 16,687 | 17,731 | 18,664 | 17,589 | 16,266 | 16,418 | 16,718 | 17,557 | 17,859 | 16,273 | 17,402 | 17,005 | 15,319 | 16,942 | 17,296 | 15,661 | 17,065 | 17,039 | 18,914 | 18,681 | 18,484 | 20,453 | 20,006 | 20,876 | 20,024 | 20,632 | 20,181 | 20,937 | 20,539 | 20,497 | 20,075 | 19,876 | 18,709 | 17,813 | 16,395 | 13,843 | 13,559 | 14,028 | 13,280 | 12,922 | 12,481 | 11,718 | 10,303 | 13,163 | 14,373 | 14,849 | 14,433 | 13,862 | 13,507 | 13,231 | 13,918 | 13,839 | 12,925 | 14,015 | 13,555 | 13,845 | 13,160 | 11,830 | 13,424 | 13,214 | 14,824 | 15,190 | 14,562 | 14,312 | 14,211 | 13,397 | 13,283 | 13,113 | 13,641 | 13,294 | 13,348 | 12,974 | 12,864 | 12,108 | 12,264 | 12,174 | 11,767 | 12,012 | 11,881 | 11,866 | 11,641 | 11,595 | 11,279 | 10,148 | 10,654 | 10,537 | 10,354 | 9,770 | 9,777 | 9,561 | 9,413 | 8,718 | 8,718 | 9,559 | 10,064 | 9,747 | 9,227 | 9,703 | 10,354 | 10,475 | 10,398 | 10,166 | 10,432 | 10,253 | 9,678 | 10,000 |
| DWS Index: Russell 2000® Index | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Account Value | $ 21,223 | $ 23,134 | $ 20,847 | $ 21,152 | $ 21,006 | $ 21,324 | $ 19,357 | $ 19,538 | $ 18,605 | $ 20,013 | $ 19,322 | $ 18,288 | $ 19,028 | $ 16,956 | $ 15,549 | $ 16,687 | $ 17,731 | $ 18,664 | $ 17,589 | $ 16,266 | $ 16,418 | $ 16,718 | $ 17,557 | $ 17,859 | $ 16,273 | $ 17,402 | $ 17,005 | $ 15,319 | $ 16,942 | $ 17,296 | $ 15,661 | $ 17,065 | $ 17,039 | $ 18,914 | $ 18,681 | $ 18,484 | $ 20,453 | $ 20,006 | $ 20,876 | $ 20,024 | $ 20,632 | $ 20,181 | $ 20,937 | $ 20,539 | $ 20,497 | $ 20,075 | $ 19,876 | $ 18,709 | $ 17,813 | $ 16,395 | $ 13,843 | $ 13,559 | $ 14,028 | $ 13,280 | $ 12,922 | $ 12,481 | $ 11,718 | $ 10,303 | $ 13,163 | $ 14,373 | $ 14,849 | $ 14,433 | $ 13,862 | $ 13,507 | $ 13,231 | $ 13,918 | $ 13,839 | $ 12,925 | $ 14,015 | $ 13,555 | $ 13,845 | $ 13,160 | $ 11,830 | $ 13,424 | $ 13,214 | $ 14,824 | $ 15,190 | $ 14,562 | $ 14,312 | $ 14,211 | $ 13,397 | $ 13,283 | $ 13,113 | $ 13,641 | $ 13,294 | $ 13,348 | $ 12,974 | $ 12,864 | $ 12,108 | $ 12,264 | $ 12,174 | $ 11,767 | $ 12,012 | $ 11,881 | $ 11,866 | $ 11,641 | $ 11,595 | $ 11,279 | $ 10,148 | $ 10,654 | $ 10,537 | $ 10,354 | $ 9,770 | $ 9,777 | $ 9,561 | $ 9,413 | $ 8,718 | $ 8,718 | $ 9,559 | $ 10,064 | $ 9,747 | $ 9,227 | $ 9,703 | $ 10,354 | $ 10,475 | $ 10,398 | $ 10,166 | $ 10,432 | $ 10,253 | $ 9,678 | $ 10,000 |
| Shareholder Report, Average Annual Return (Details) | 12 Months Ended | 60 Months Ended | 120 Months Ended |
| Dec. 31, 2024 | Dec. 31, 2024 | Dec. 31, 2024 | |
| C000017156 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class A | ||
| C000017157 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class B | ||
| Without Sales Load [Member] | C000017156 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 11.15% | 7.09% | 7.53% |
| Without Sales Load [Member] | C000017157 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 10.89% | 6.77% | 7.23% |
| DWS Index: Russell 3000® Index | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 23.81% | 13.86% | 12.55% |
| DWS Index: Russell 3000® Index | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 23.81% | 13.86% | 12.55% |
| DWS Index: Russell 2000® Index | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 11.54% | 7.40% | 7.82% |
| DWS Index: Russell 2000® Index | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 11.54% | 7.40% | 7.82% |
| Shareholder Report, Holdings (Details) | Dec. 31, 2024 |
| C000017156 | FTAI Aviation Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000017156 | Sprouts Farmers Market, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000017156 | Insmed, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000017156 | Vaxcyte, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000017156 | Credo Technology Group Holding Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000017156 | Applied Industrial Technologies, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000017156 | Mueller Industries, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000017156 | Rocket Lab USA, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000017156 | Fluor Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000017156 | IonQ, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000017156 | SectorFinancials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18% |
| C000017156 | SectorIndustrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18% |
| C000017156 | SectorHealth Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16% |
| C000017156 | SectorInformation Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| C000017156 | SectorConsumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000017156 | SectorReal Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000017156 | SectorEnergy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000017156 | SectorMaterials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000017156 | SectorConsumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000017156 | SectorUtilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000017156 | SectorCommunication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000017156 | AssetCommon Stocks | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99% |
| C000017156 | AssetCash Equivalents | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000017156 | AssetGovernment & Agency Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000017156 | AssetRights | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000017156 | AssetOther Investments | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000017156 | AssetWarrants | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000017156 | Asset Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000017157 | FTAI Aviation Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000017157 | Sprouts Farmers Market, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000017157 | Insmed, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000017157 | Vaxcyte, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000017157 | Credo Technology Group Holding Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000017157 | Applied Industrial Technologies, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000017157 | Mueller Industries, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000017157 | Rocket Lab USA, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000017157 | Fluor Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000017157 | IonQ, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000017157 | SectorFinancials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18% |
| C000017157 | SectorIndustrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18% |
| C000017157 | SectorHealth Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16% |
| C000017157 | SectorInformation Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| C000017157 | SectorConsumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000017157 | SectorReal Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000017157 | SectorEnergy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5% |
| C000017157 | SectorMaterials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000017157 | SectorConsumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000017157 | SectorUtilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000017157 | SectorCommunication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000017157 | AssetCommon Stocks | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99% |
| C000017157 | AssetCash Equivalents | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000017157 | AssetGovernment & Agency Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000017157 | AssetRights | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000017157 | AssetOther Investments | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000017157 | AssetWarrants | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000017157 | Asset Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
