| Form N-CSR Cover | 6 Months Ended |
| Jun. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| 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 | 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 | DEUTSCHE DWS INVESTMENTS VIT FUNDS |
| Entity Central Index Key | 0001006373 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jun. 30, 2024 |
| C000017156 | |
| Shareholder Report [Line Items] | |
| Fund Name | DWS Small Cap Index VIP |
| Class Name | Class A |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about DWS Small Cap Index VIP ("the Fund") for the period 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 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-B18"><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 six months? (Based on a hypothetical $10,000 investment) Cost of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $19 0.37% 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 | $ 19 |
| Expense Ratio, Percent | 0.37% |
| AssetsNet | $ 391,985,600 |
| Holdings Count | Holding | 1,994 |
| Advisory Fees Paid, Amount | $ 448,609 |
| InvestmentCompanyPortfolioTurnover | 14% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets ($) 391,985,600 Number of Portfolio Holdings 1,994 Portfolio Turnover Rate (%) 14 Total Net Advisory Fees Paid ($) 448,609 |
| Holdings [Text Block] | Asset Allocation Asset Type % of Net Assets Common Stocks 99% Cash Equivalents 1% Government & Agency Obligations 0% Rights 0% Warrants 0% Other Investments 0% Other Assets and Liabilities, Net 0% Total 100% |
| C000017157 | |
| Shareholder Report [Line Items] | |
| Fund Name | DWS Small Cap Index VIP |
| Class Name | Class B |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about DWS Small Cap Index VIP ("the Fund") for the period 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 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-B36"><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 six months? (Based on a hypothetical $10,000 investment) Cost of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class B $34 0.67% 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 | $ 34 |
| Expense Ratio, Percent | 0.67% |
| AssetsNet | $ 391,985,600 |
| Holdings Count | Holding | 1,994 |
| Advisory Fees Paid, Amount | $ 448,609 |
| InvestmentCompanyPortfolioTurnover | 14% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets ($) 391,985,600 Number of Portfolio Holdings 1,994 Portfolio Turnover Rate (%) 14 Total Net Advisory Fees Paid ($) 448,609 |
| Holdings [Text Block] | Asset Allocation Asset Type % of Net Assets Common Stocks 99% Cash Equivalents 1% Government & Agency Obligations 0% Rights 0% Warrants 0% Other Investments 0% Other Assets and Liabilities, Net 0% Total 100% |
| Shareholder Report, Holdings (Details) | Jun. 30, 2024 |
| C000017156 | Insmed, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000017156 | FTAI Aviation Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000017156 | Abercrombie & Fitch Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000017156 | Fabrinet | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000017156 | Sprouts Farmers Market, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000017156 | Vaxcyte, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000017156 | Applied Industrial Technologies, 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 | HealthEquity, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000017156 | SPS Commerce, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000017156 | SectorIndustrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17% |
| C000017156 | SectorHealth Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17% |
| C000017156 | SectorFinancials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17% |
| C000017156 | SectorInformation Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13% |
| C000017156 | SectorConsumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10% |
| C000017156 | SectorEnergy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| C000017156 | SectorReal Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| 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 | 2% |
| 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 | AssetWarrants | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000017156 | AssetOther Investments | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000017156 | Asset Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000017157 | Insmed, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000017157 | FTAI Aviation Ltd. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000017157 | Abercrombie & Fitch Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000017157 | Fabrinet | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000017157 | Sprouts Farmers Market, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000017157 | Vaxcyte, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000017157 | Applied Industrial Technologies, 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 | HealthEquity, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000017157 | SPS Commerce, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| C000017157 | SectorIndustrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17% |
| C000017157 | SectorHealth Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17% |
| C000017157 | SectorFinancials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17% |
| C000017157 | SectorInformation Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13% |
| C000017157 | SectorConsumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10% |
| C000017157 | SectorEnergy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| C000017157 | SectorReal Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| 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 | 2% |
| 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 | AssetWarrants | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000017157 | AssetOther Investments | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000017157 | Asset Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
