| Form N-CSR Cover | 6 Months Ended |
| Nov. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | DEUTSCHE DWS PORTFOLIO TRUST |
| Entity Central Index Key | 0000088063 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Nov. 30, 2024 |
| Shareholder Report | 6 Months Ended |
| Nov. 30, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | DEUTSCHE DWS PORTFOLIO TRUST |
| Entity Central Index Key | 0000088063 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Nov. 30, 2024 |
| C000049879 | |
| Shareholder Report [Line Items] | |
| Fund Name | DWS Floating Rate Fund |
| Class Name | Class A |
| Trading Symbol | DFRAX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about DWS Floating Rate Fund (the "Fund") for the period June 1, 2024 to November 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/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 six months? (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 $51 1.00% Gross expense ratio as of the latest prospectus: 1.31%. See prospectus for any contractual or voluntary waivers; without a waiver, costs would have been higher. |
| Expenses Paid, Amount | $ 51 |
| Expense Ratio, Percent | 1% |
| AssetsNet | $ 129,428,799 |
| Holdings Count | Holding | 306 |
| Advisory Fees Paid, Amount | $ 255,033 |
| InvestmentCompanyPortfolioTurnover | 38% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets ($) 129,428,799 Number of Portfolio Holdings 306 Portfolio Turnover Rate (%) 38 Total Net Advisory Fees Paid ($) 255,033 |
| Holdings [Text Block] | Asset Allocation Asset Type % of Net Assets Loan Participations and Assignments 85% Exchange-Traded Funds 9% Cash Equivalents 8% Corporate Bonds 3% Closed-End Investment Companies 1% Warrants 0% Common Stocks 0% Other Assets and Liabilities, Net (6%) Total 100% Sector Allocation Sector % of Net Assets Industrials 17% Information Technology 14% Financials 13% Consumer Discretionary 13% Materials 9% Health Care 8% Energy 4% Communication Services 4% Utilities 3% Consumer Staples 2% Real Estate 1% Credit Quality Credit Rating % of Net Assets BBB 3% BB 17% B 59% Below B 3% Not Rated 3% |
| C000049880 | |
| Shareholder Report [Line Items] | |
| Fund Name | DWS Floating Rate Fund |
| Class Name | Class C |
| Trading Symbol | DFRCX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about DWS Floating Rate Fund (the "Fund") for the period June 1, 2024 to November 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/mutualreports |
| Additional Information Phone Number | (800) 728-3337 |
| Additional Information Website | dws.com/mutualreports</span>" id="sjs-B38"><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 six months? (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 C $89 1.75% Gross expense ratio as of the latest prospectus: 2.11%. See prospectus for any contractual or voluntary waivers; without a waiver, costs would have been higher. |
| Expenses Paid, Amount | $ 89 |
| Expense Ratio, Percent | 1.75% |
| AssetsNet | $ 129,428,799 |
| Holdings Count | Holding | 306 |
| Advisory Fees Paid, Amount | $ 255,033 |
| InvestmentCompanyPortfolioTurnover | 38% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets ($) 129,428,799 Number of Portfolio Holdings 306 Portfolio Turnover Rate (%) 38 Total Net Advisory Fees Paid ($) 255,033 |
| Holdings [Text Block] | Asset Allocation Asset Type % of Net Assets Loan Participations and Assignments 85% Exchange-Traded Funds 9% Cash Equivalents 8% Corporate Bonds 3% Closed-End Investment Companies 1% Warrants 0% Common Stocks 0% Other Assets and Liabilities, Net (6%) Total 100% Sector Allocation Sector % of Net Assets Industrials 17% Information Technology 14% Financials 13% Consumer Discretionary 13% Materials 9% Health Care 8% Energy 4% Communication Services 4% Utilities 3% Consumer Staples 2% Real Estate 1% Credit Quality Credit Rating % of Net Assets BBB 3% BB 17% B 59% Below B 3% Not Rated 3% |
| C000049881 | |
| Shareholder Report [Line Items] | |
| Fund Name | DWS Floating Rate Fund |
| Class Name | Class S |
| Trading Symbol | DFRPX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about DWS Floating Rate Fund (the "Fund") for the period June 1, 2024 to November 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/mutualreports |
| Additional Information Phone Number | (800) 728-3337 |
| Additional Information Website | dws.com/mutualreports</span>" id="sjs-B57"><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 six months? (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 S $41 0.80% Gross expense ratio as of the latest prospectus: 1.15%. See prospectus for any contractual or voluntary waivers; without a waiver, costs would have been higher. |
| Expenses Paid, Amount | $ 41 |
| Expense Ratio, Percent | 0.80% |
| AssetsNet | $ 129,428,799 |
| Holdings Count | Holding | 306 |
| Advisory Fees Paid, Amount | $ 255,033 |
| InvestmentCompanyPortfolioTurnover | 38% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets ($) 129,428,799 Number of Portfolio Holdings 306 Portfolio Turnover Rate (%) 38 Total Net Advisory Fees Paid ($) 255,033 |
| Holdings [Text Block] | Asset Allocation Asset Type % of Net Assets Loan Participations and Assignments 85% Exchange-Traded Funds 9% Cash Equivalents 8% Corporate Bonds 3% Closed-End Investment Companies 1% Warrants 0% Common Stocks 0% Other Assets and Liabilities, Net (6%) Total 100% Sector Allocation Sector % of Net Assets Industrials 17% Information Technology 14% Financials 13% Consumer Discretionary 13% Materials 9% Health Care 8% Energy 4% Communication Services 4% Utilities 3% Consumer Staples 2% Real Estate 1% Credit Quality Credit Rating % of Net Assets BBB 3% BB 17% B 59% Below B 3% Not Rated 3% |
| C000049882 | |
| Shareholder Report [Line Items] | |
| Fund Name | DWS Floating Rate Fund |
| Class Name | Institutional Class |
| Trading Symbol | DFRTX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about DWS Floating Rate Fund (the "Fund") for the period June 1, 2024 to November 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/mutualreports |
| Additional Information Phone Number | (800) 728-3337 |
| Additional Information Website | dws.com/mutualreports</span>" id="sjs-B76"><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 six months? (Based on a hypothetical $10,000 investment) Fund Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Institutional Class $38 0.75% Gross expense ratio as of the latest prospectus: 0.98%. See prospectus for any contractual or voluntary waivers; without a waiver, costs would have been higher. |
| Expenses Paid, Amount | $ 38 |
| Expense Ratio, Percent | 0.75% |
| AssetsNet | $ 129,428,799 |
| Holdings Count | Holding | 306 |
| Advisory Fees Paid, Amount | $ 255,033 |
| InvestmentCompanyPortfolioTurnover | 38% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets ($) 129,428,799 Number of Portfolio Holdings 306 Portfolio Turnover Rate (%) 38 Total Net Advisory Fees Paid ($) 255,033 |
| Holdings [Text Block] | Asset Allocation Asset Type % of Net Assets Loan Participations and Assignments 85% Exchange-Traded Funds 9% Cash Equivalents 8% Corporate Bonds 3% Closed-End Investment Companies 1% Warrants 0% Common Stocks 0% Other Assets and Liabilities, Net (6%) Total 100% Sector Allocation Sector % of Net Assets Industrials 17% Information Technology 14% Financials 13% Consumer Discretionary 13% Materials 9% Health Care 8% Energy 4% Communication Services 4% Utilities 3% Consumer Staples 2% Real Estate 1% Credit Quality Credit Rating % of Net Assets BBB 3% BB 17% B 59% Below B 3% Not Rated 3% |
| Shareholder Report, Holdings (Details) | Nov. 30, 2024 |
| C000049879 | Credit Rating Other Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000049879 | NR | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000049879 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000049879 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17% |
| C000049879 | B | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 59% |
| C000049879 | SectorIndustrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17% |
| C000049879 | SectorInformation Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| C000049879 | SectorFinancials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13% |
| C000049879 | SectorConsumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13% |
| C000049879 | SectorMaterials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000049879 | SectorHealth Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| C000049879 | SectorEnergy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000049879 | SectorCommunication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000049879 | SectorUtilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000049879 | SectorConsumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000049879 | SectorReal Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000049879 | AssetLoan Participations and Assignments | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 85% |
| C000049879 | AssetExchange-Traded Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000049879 | AssetCash Equivalents | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| C000049879 | AssetCorporate Bonds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000049879 | AssetClosed-End Investment Companies | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000049879 | AssetWarrants | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000049879 | AssetCommon Stocks | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000049879 | Asset Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (6.00%) |
| C000049880 | Credit Rating Other Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000049880 | NR | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000049880 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000049880 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17% |
| C000049880 | B | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 59% |
| C000049880 | SectorIndustrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17% |
| C000049880 | SectorInformation Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| C000049880 | SectorFinancials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13% |
| C000049880 | SectorConsumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13% |
| C000049880 | SectorMaterials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000049880 | SectorHealth Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| C000049880 | SectorEnergy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000049880 | SectorCommunication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000049880 | SectorUtilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000049880 | SectorConsumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000049880 | SectorReal Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000049880 | AssetLoan Participations and Assignments | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 85% |
| C000049880 | AssetExchange-Traded Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000049880 | AssetCash Equivalents | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| C000049880 | AssetCorporate Bonds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000049880 | AssetClosed-End Investment Companies | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000049880 | AssetWarrants | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000049880 | AssetCommon Stocks | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000049880 | Asset Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (6.00%) |
| C000049881 | Credit Rating Other Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000049881 | NR | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000049881 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000049881 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17% |
| C000049881 | B | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 59% |
| C000049881 | SectorIndustrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17% |
| C000049881 | SectorInformation Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| C000049881 | SectorFinancials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13% |
| C000049881 | SectorConsumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13% |
| C000049881 | SectorMaterials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000049881 | SectorHealth Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| C000049881 | SectorEnergy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000049881 | SectorCommunication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000049881 | SectorUtilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000049881 | SectorConsumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000049881 | SectorReal Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000049881 | AssetLoan Participations and Assignments | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 85% |
| C000049881 | AssetExchange-Traded Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000049881 | AssetCash Equivalents | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| C000049881 | AssetCorporate Bonds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000049881 | AssetClosed-End Investment Companies | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000049881 | AssetWarrants | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000049881 | AssetCommon Stocks | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000049881 | Asset Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (6.00%) |
| C000049882 | Credit Rating Other Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000049882 | NR | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000049882 | BBB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000049882 | BB | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17% |
| C000049882 | B | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 59% |
| C000049882 | SectorIndustrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17% |
| C000049882 | SectorInformation Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| C000049882 | SectorFinancials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13% |
| C000049882 | SectorConsumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13% |
| C000049882 | SectorMaterials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000049882 | SectorHealth Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| C000049882 | SectorEnergy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000049882 | SectorCommunication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000049882 | SectorUtilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000049882 | SectorConsumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000049882 | SectorReal Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000049882 | AssetLoan Participations and Assignments | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 85% |
| C000049882 | AssetExchange-Traded Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9% |
| C000049882 | AssetCash Equivalents | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| C000049882 | AssetCorporate Bonds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000049882 | AssetClosed-End Investment Companies | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000049882 | AssetWarrants | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000049882 | AssetCommon Stocks | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000049882 | Asset Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (6.00%) |
