| Form N-CSR Cover | 12 Months Ended |
| Jul. 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | DEUTSCHE DWS MONEY FUNDS |
| Entity Central Index Key | 0000055189 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jul. 31, 2024 |
| Shareholder Report | 12 Months Ended |
| Jul. 31, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | DEUTSCHE DWS MONEY FUNDS |
| Entity Central Index Key | 0000055189 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jul. 31, 2024 |
| C000035161 | |
| Shareholder Report [Line Items] | |
| Fund Name | DWS Money Market Prime Series |
| Class Name | DWS Cash Investment Trust - Class A |
| Trading Symbol | DOAXX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about DWS Money Market Prime Series ("the Fund") for the period August 1, 2023 to July 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/mutualreports |
| Additional Information Phone Number | (800) 728-3337 |
| Additional Information Website | dws.com/mutualreports</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/mutualreports</span> |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Cost of a $10,000 investment Costs paid as a percentage of a $10,000 investment DWS Cash Investment Trust - Class A $87 0.85% Gross expense ratio as of the latest prospectus: 0.84%. See prospectus for any contractual or voluntary waivers; without a waiver, costs would have been higher. |
| Expenses Paid, Amount | $ 87 |
| Expense Ratio, Percent | 0.85% |
| AssetsNet | $ 572,772,230 |
| Holdings Count | Holding | 74 |
| Advisory Fees Paid, Amount | $ 1,837,421 |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets ($) 572,772,230 Number of Portfolio Holdings 74 Total Net Advisory Fees Paid ($) 1,837,421 Weighted Average Maturity 25 days 7-Day Current Yield 4.59% Weighted average maturity, also known as effective maturity, is the weighted average of the maturity date of bonds held by the Fund taking into consideration any available maturity shortening features. Yields fluctuate and are not guaranteed. The 7-day current yield is the annualized net investment income per share as of July 31, 2024. The 7-Day Current Yield would have been 4.57% had certain expenses not been reduced. |
| Holdings [Text Block] | Asset Type % of Net Assets Repurchase Agreements 34% Commercial Paper 34% Variable Rate Demand Notes 17% Time Deposits 9% Certificates of Deposit and Bank Notes 3% Government & Agency Obligations 3% Variable Rate Demand Preferred Shares 1% Other Assets and Liabilities, Net (1%) Total 100% |
| C000035163 | |
| Shareholder Report [Line Items] | |
| Fund Name | DWS Money Market Prime Series |
| Class Name | DWS Cash Investment Trust - Class C |
| Trading Symbol | DOCXX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about DWS Money Market Prime Series ("the Fund") for the period August 1, 2023 to July 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/mutualreports |
| Additional Information Phone Number | (800) 728-3337 |
| Additional Information Website | dws.com/mutualreports</span>" id="sjs-B37"><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/mutualreports</span> |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Cost of a $10,000 investment Costs paid as a percentage of a $10,000 investment DWS Cash Investment Trust - Class C $161 1.58% Gross expense ratio as of the latest prospectus: 1.57%. See prospectus for any contractual or voluntary waivers; without a waiver, costs would have been higher. |
| Expenses Paid, Amount | $ 161 |
| Expense Ratio, Percent | 1.58% |
| AssetsNet | $ 572,772,230 |
| Holdings Count | Holding | 74 |
| Advisory Fees Paid, Amount | $ 1,837,421 |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets ($) 572,772,230 Number of Portfolio Holdings 74 Total Net Advisory Fees Paid ($) 1,837,421 Weighted Average Maturity 25 days 7-Day Current Yield 3.86% Weighted average maturity, also known as effective maturity, is the weighted average of the maturity date of bonds held by the Fund taking into consideration any available maturity shortening features. Yields fluctuate and are not guaranteed. The 7-day current yield is the annualized net investment income per share as of July 31, 2024. |
| Holdings [Text Block] | Asset Type % of Net Assets Repurchase Agreements 34% Commercial Paper 34% Variable Rate Demand Notes 17% Time Deposits 9% Certificates of Deposit and Bank Notes 3% Government & Agency Obligations 3% Variable Rate Demand Preferred Shares 1% Other Assets and Liabilities, Net (1%) Total 100% |
| C000035164 | |
| Shareholder Report [Line Items] | |
| Fund Name | DWS Money Market Prime Series |
| Class Name | DWS Cash Investment Trust - Class S |
| Trading Symbol | DOSXX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about DWS Money Market Prime Series ("the Fund") for the period August 1, 2023 to July 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/mutualreports |
| Additional Information Phone Number | (800) 728-3337 |
| Additional Information Website | dws.com/mutualreports</span>" id="sjs-B55"><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/mutualreports</span> |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Cost of a $10,000 investment Costs paid as a percentage of a $10,000 investment DWS Cash Investment Trust - Class S $58 0.57% Gross expense ratio as of the latest prospectus: 0.63%. See prospectus for any contractual or voluntary waivers; without a waiver, costs would have been higher. |
| Expenses Paid, Amount | $ 58 |
| Expense Ratio, Percent | 0.57% |
| AssetsNet | $ 572,772,230 |
| Holdings Count | Holding | 74 |
| Advisory Fees Paid, Amount | $ 1,837,421 |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets ($) 572,772,230 Number of Portfolio Holdings 74 Total Net Advisory Fees Paid ($) 1,837,421 Weighted Average Maturity 25 days 7-Day Current Yield 4.86% Weighted average maturity, also known as effective maturity, is the weighted average of the maturity date of bonds held by the Fund taking into consideration any available maturity shortening features. Yields fluctuate and are not guaranteed. The 7-day current yield is the annualized net investment income per share as of July 31, 2024. The 7-Day Current Yield would have been 4.78% had certain expenses not been reduced. |
| Holdings [Text Block] | Asset Type % of Net Assets Repurchase Agreements 34% Commercial Paper 34% Variable Rate Demand Notes 17% Time Deposits 9% Certificates of Deposit and Bank Notes 3% Government & Agency Obligations 3% Variable Rate Demand Preferred Shares 1% Other Assets and Liabilities, Net (1%) Total 100% |
| C000016691 | |
| Shareholder Report [Line Items] | |
| Fund Name | DWS Money Market Prime Series |
| Class Name | DWS Money Market Fund |
| Trading Symbol | KMMXX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about DWS Money Market Prime Series ("the Fund") for the period August 1, 2023 to July 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/mutualreports |
| Additional Information Phone Number | (800) 728-3337 |
| Additional Information Website | dws.com/mutualreports</span>" id="sjs-B73"><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/mutualreports</span> |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Cost of a $10,000 investment Costs paid as a percentage of a $10,000 investment DWS Money Market Fund $58 0.57% Gross expense ratio as of the latest prospectus: 0.59%. See prospectus for any contractual or voluntary waivers; without a waiver, costs would have been higher. |
| Expenses Paid, Amount | $ 58 |
| Expense Ratio, Percent | 0.57% |
| AssetsNet | $ 572,772,230 |
| Holdings Count | Holding | 74 |
| Advisory Fees Paid, Amount | $ 1,837,421 |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets ($) 572,772,230 Number of Portfolio Holdings 74 Total Net Advisory Fees Paid ($) 1,837,421 Weighted Average Maturity 25 days 7-Day Current Yield 4.86% Weighted average maturity, also known as effective maturity, is the weighted average of the maturity date of bonds held by the Fund taking into consideration any available maturity shortening features. Yields fluctuate and are not guaranteed. The 7-day current yield is the annualized net investment income per share as of July 31, 2024. The 7-Day Current Yield would have been 4.84% had certain expenses not been reduced. |
| Holdings [Text Block] | Asset Type % of Net Assets Repurchase Agreements 34% Commercial Paper 34% Variable Rate Demand Notes 17% Time Deposits 9% Certificates of Deposit and Bank Notes 3% Government & Agency Obligations 3% Variable Rate Demand Preferred Shares 1% Other Assets and Liabilities, Net (1%) Total 100% |
| Shareholder Report, Holdings (Details) | Jul. 31, 2024 |
| C000035161 | AssetRepurchase Agreements | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34% |
| C000035161 | AssetCommercial Paper | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34% |
| C000035161 | AssetVariable Rate Demand Notes | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17% |
| C000035161 | AssetTime Deposits | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000035161 | AssetCertificates of Deposit and Bank Notes | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000035161 | AssetGovernment & Agency Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000035161 | AssetVariable Rate Demand Preferred Shares | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000035161 | Asset Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (1.00%) |
| C000035163 | AssetRepurchase Agreements | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34% |
| C000035163 | AssetCommercial Paper | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34% |
| C000035163 | AssetVariable Rate Demand Notes | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17% |
| C000035163 | AssetTime Deposits | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000035163 | AssetCertificates of Deposit and Bank Notes | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000035163 | AssetGovernment & Agency Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000035163 | AssetVariable Rate Demand Preferred Shares | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000035163 | Asset Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (1.00%) |
| C000035164 | AssetRepurchase Agreements | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34% |
| C000035164 | AssetCommercial Paper | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34% |
| C000035164 | AssetVariable Rate Demand Notes | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17% |
| C000035164 | AssetTime Deposits | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000035164 | AssetCertificates of Deposit and Bank Notes | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000035164 | AssetGovernment & Agency Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000035164 | AssetVariable Rate Demand Preferred Shares | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000035164 | Asset Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (1.00%) |
| C000016691 | AssetRepurchase Agreements | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34% |
| C000016691 | AssetCommercial Paper | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 34% |
| C000016691 | AssetVariable Rate Demand Notes | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17% |
| C000016691 | AssetTime Deposits | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000016691 | AssetCertificates of Deposit and Bank Notes | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000016691 | AssetGovernment & Agency Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000016691 | AssetVariable Rate Demand Preferred Shares | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000016691 | Asset Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (1.00%) |
