| 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 |
| C000017151 | |
| Shareholder Report [Line Items] | |
| Fund Name | DWS Equity 500 Index VIP |
| Class Name | Class A |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about DWS Equity 500 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 $13 0.25% Gross expense ratio as of the latest prospectus: 0.27%. 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 | $ 13 |
| Expense Ratio, Percent | 0.25% |
| AssetsNet | $ 748,101,297 |
| Holdings Count | Holding | 506 |
| Advisory Fees Paid, Amount | $ 445,539 |
| InvestmentCompanyPortfolioTurnover | 1% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets ($) 748,101,297 Number of Portfolio Holdings 506 Portfolio Turnover Rate (%) 1 Total Net Advisory Fees Paid ($) 445,539 |
| Holdings [Text Block] | Asset Allocation Asset Type % of Net Assets Common Stocks 99% Cash Equivalents 1% Government & Agency Obligations 0% Other Assets and Liabilities, Net 0% Total 100% |
| C000017152 | |
| Shareholder Report [Line Items] | |
| Fund Name | DWS Equity 500 Index VIP |
| Class Name | Class B |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about DWS Equity 500 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 0.64% Gross expense ratio as of the latest prospectus: 0.66%. 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 | 0.64% |
| AssetsNet | $ 748,101,297 |
| Holdings Count | Holding | 506 |
| Advisory Fees Paid, Amount | $ 445,539 |
| InvestmentCompanyPortfolioTurnover | 1% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets ($) 748,101,297 Number of Portfolio Holdings 506 Portfolio Turnover Rate (%) 1 Total Net Advisory Fees Paid ($) 445,539 |
| Holdings [Text Block] | Asset Allocation Asset Type % of Net Assets Common Stocks 99% Cash Equivalents 1% Government & Agency Obligations 0% Other Assets and Liabilities, Net 0% Total 100% |
| Shareholder Report, Holdings (Details) | Jun. 30, 2024 |
| C000017151 | Microsoft Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.20% |
| C000017151 | NVIDIA Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.60% |
| C000017151 | Apple, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.60% |
| C000017151 | Alphabet, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000017151 | Amazon.com, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000017151 | Meta Platforms, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000017151 | Berkshire Hathaway, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000017151 | Eli Lilly & Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000017151 | Broadcom, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| C000017151 | JPMorgan Chase & Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000017151 | SectorInformation Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 32% |
| C000017151 | SectorFinancials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12% |
| C000017151 | SectorHealth Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12% |
| C000017151 | SectorConsumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10% |
| C000017151 | SectorCommunication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000017151 | SectorIndustrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| C000017151 | SectorConsumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000017151 | SectorEnergy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000017151 | SectorUtilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000017151 | SectorMaterials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000017151 | SectorReal Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000017151 | AssetCommon Stocks | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99% |
| C000017151 | AssetCash Equivalents | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000017151 | AssetGovernment & Agency Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000017151 | Asset Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000017152 | Microsoft Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.20% |
| C000017152 | NVIDIA Corp. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.60% |
| C000017152 | Apple, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.60% |
| C000017152 | Alphabet, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000017152 | Amazon.com, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000017152 | Meta Platforms, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000017152 | Berkshire Hathaway, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000017152 | Eli Lilly & Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000017152 | Broadcom, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| C000017152 | JPMorgan Chase & Co. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000017152 | SectorInformation Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 32% |
| C000017152 | SectorFinancials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12% |
| C000017152 | SectorHealth Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12% |
| C000017152 | SectorConsumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10% |
| C000017152 | SectorCommunication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000017152 | SectorIndustrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| C000017152 | SectorConsumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000017152 | SectorEnergy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000017152 | SectorUtilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000017152 | SectorMaterials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000017152 | SectorReal Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000017152 | AssetCommon Stocks | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99% |
| C000017152 | AssetCash Equivalents | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000017152 | AssetGovernment & Agency Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000017152 | Asset Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
