| Form N-CSR Cover | 6 Months Ended |
| Nov. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | T. ROWE PRICE SHORT-TERM BOND FUND, INC. |
| Entity Central Index Key | 0000731890 |
| 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 | T. ROWE PRICE SHORT-TERM BOND FUND, INC. |
| Entity Central Index Key | 0000731890 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Nov. 30, 2024 |
| C000119983 | |
| Shareholder Report [Line Items] | |
| Fund Name | Ultra Short-Term Bond Fund |
| Class Name | Investor Class |
| Trading Symbol | TRBUX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Ultra Short-Term Bond Fund (the "fund") for the period of June 1, 2024 to November 30, 2024. You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information at www.troweprice.com/prospectus info troweprice.com |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information at www.troweprice.com/prospectus info troweprice.com |
| Material Fund Change Notice [Text Block] | |
| Additional Information Phone Number | 1‑800‑638‑5660 |
| Additional Information Email | info@troweprice.com</span>" id="sjs-B20"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify;">info@troweprice.com</span> |
| Additional Information Website | www.troweprice.com/prospectus |
| Expenses [Text Block] | What were the fund costs for the last six months? Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Ultra Short-Term Bond Fund - Investor Class $16 0.31% |
| Expenses Paid, Amount | $ 16 |
| Expense Ratio, Percent | 0.31% |
| AssetsNet | $ 2,275,098,000 |
| Holdings Count | Holding | 435 |
| InvestmentCompanyPortfolioTurnover | 41% |
| Additional Fund Statistics Significance or Limits [Text Block] | What are some fund statistics? Fund Statistics Total Net Assets (000s) $2,275,098 Number of Portfolio Holdings 435 |
| Holdings [Text Block] | AAA Rated 30.1 % AA Rated 7.1 A Rated 22.3 BBB Rated 35.8 BB Rated and Below 0.9 Not Rated 0.1 U.S. Treasury Securities 3.9 Reserves - |
| Largest Holdings [Text Block] | Santander Drive Auto Receivables Trust 3.2 % U.S. Treasury Bills 3.0 Exeter Automobile Receivables Trust 2.0 Verus Securitization Trust 1.7 Octane Receivables Trust 1.5 Carvana Auto Receivables Trust 1.5 Enterprise Fleet Financing 1.4 Targa Resources 1.2 Structured Agency Credit Risk Debt Notes 1.1 Bacardi-Martini 1.0 |
| Material Fund Change [Text Block] | |
| Updated Prospectus Web Address | www.troweprice.com/paperless |
| C000193195 | |
| Shareholder Report [Line Items] | |
| Fund Name | Ultra Short-Term Bond Fund |
| Class Name | I Class |
| Trading Symbol | TRSTX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Ultra Short-Term Bond Fund (the "fund") for the period of June 1, 2024 to November 30, 2024. You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information at www.troweprice.com/prospectus info troweprice.com |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information at www.troweprice.com/prospectus info troweprice.com |
| Material Fund Change Notice [Text Block] | |
| Additional Information Phone Number | 1‑800‑638‑5660 |
| Additional Information Email | info@troweprice.com</span>" id="sjs-B43"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify;">info@troweprice.com</span> |
| Additional Information Website | www.troweprice.com/prospectus |
| Expenses [Text Block] | What were the fund costs for the last six months? Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Ultra Short-Term Bond Fund - I Class $10 0.20% |
| Expenses Paid, Amount | $ 10 |
| Expense Ratio, Percent | 0.20% |
| AssetsNet | $ 2,275,098,000 |
| Holdings Count | Holding | 435 |
| InvestmentCompanyPortfolioTurnover | 41% |
| Additional Fund Statistics Significance or Limits [Text Block] | What are some fund statistics? Fund Statistics Total Net Assets (000s) $2,275,098 Number of Portfolio Holdings 435 |
| Holdings [Text Block] | AAA Rated 30.1 % AA Rated 7.1 A Rated 22.3 BBB Rated 35.8 BB Rated and Below 0.9 Not Rated 0.1 U.S. Treasury Securities 3.9 Reserves - |
| Largest Holdings [Text Block] | Santander Drive Auto Receivables Trust 3.2 % U.S. Treasury Bills 3.0 Exeter Automobile Receivables Trust 2.0 Verus Securitization Trust 1.7 Octane Receivables Trust 1.5 Carvana Auto Receivables Trust 1.5 Enterprise Fleet Financing 1.4 Targa Resources 1.2 Structured Agency Credit Risk Debt Notes 1.1 Bacardi-Martini 1.0 |
| Material Fund Change [Text Block] | |
| Updated Prospectus Web Address | www.troweprice.com/paperless |
| C000225825 | |
| Shareholder Report [Line Items] | |
| Fund Name | Ultra Short-Term Bond Fund |
| Class Name | Z Class |
| Trading Symbol | TRZWX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Ultra Short-Term Bond Fund (the "fund") for the period of June 1, 2024 to November 30, 2024. You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information at www.troweprice.com/prospectus info troweprice.com |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information at www.troweprice.com/prospectus info troweprice.com |
| Material Fund Change Notice [Text Block] | |
| Additional Information Phone Number | 1‑800‑638‑5660 |
| Additional Information Email | info@troweprice.com</span>" id="sjs-B66"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify;">info@troweprice.com</span> |
| Additional Information Website | www.troweprice.com/prospectus |
| Expenses [Text Block] | What were the fund costs for the last six months? Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Ultra Short-Term Bond Fund - Z Class $0 0.00% |
| Expenses Paid, Amount | $ 0 |
| Expense Ratio, Percent | 0% |
| AssetsNet | $ 2,275,098,000 |
| Holdings Count | Holding | 435 |
| InvestmentCompanyPortfolioTurnover | 41% |
| Additional Fund Statistics Significance or Limits [Text Block] | What are some fund statistics? Fund Statistics Total Net Assets (000s) $2,275,098 Number of Portfolio Holdings 435 |
| Holdings [Text Block] | AAA Rated 30.1 % AA Rated 7.1 A Rated 22.3 BBB Rated 35.8 BB Rated and Below 0.9 Not Rated 0.1 U.S. Treasury Securities 3.9 Reserves - |
| Largest Holdings [Text Block] | Santander Drive Auto Receivables Trust 3.2 % U.S. Treasury Bills 3.0 Exeter Automobile Receivables Trust 2.0 Verus Securitization Trust 1.7 Octane Receivables Trust 1.5 Carvana Auto Receivables Trust 1.5 Enterprise Fleet Financing 1.4 Targa Resources 1.2 Structured Agency Credit Risk Debt Notes 1.1 Bacardi-Martini 1.0 |
| Material Fund Change [Text Block] | |
| Updated Prospectus Web Address | www.troweprice.com/paperless |
| Shareholder Report, Holdings (Details) | Nov. 30, 2024 |
| C000119983 | Santander Drive Auto Receivables Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000119983 | U.S. Treasury Bills | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000119983 | Exeter Automobile Receivables Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000119983 | Verus Securitization Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000119983 | Octane Receivables Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| C000119983 | Carvana Auto Receivables Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| C000119983 | Enterprise Fleet Financing | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000119983 | Targa Resources | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| C000119983 | Structured Agency Credit Risk Debt Notes | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| C000119983 | Bacardi-Martini | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000119983 | AAA Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 30.10% |
| C000119983 | AA Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.10% |
| C000119983 | A Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.30% |
| C000119983 | BBB Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 35.80% |
| C000119983 | BB Rated and Below | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000119983 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000119983 | U.S. Treasury Securities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| C000119983 | Other Holdings Grouping | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (0.20%) |
| C000193195 | Santander Drive Auto Receivables Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000193195 | U.S. Treasury Bills | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000193195 | Exeter Automobile Receivables Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000193195 | Verus Securitization Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000193195 | Octane Receivables Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| C000193195 | Carvana Auto Receivables Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| C000193195 | Enterprise Fleet Financing | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000193195 | Targa Resources | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| C000193195 | Structured Agency Credit Risk Debt Notes | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| C000193195 | Bacardi-Martini | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000193195 | AAA Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 30.10% |
| C000193195 | AA Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.10% |
| C000193195 | A Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.30% |
| C000193195 | BBB Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 35.80% |
| C000193195 | BB Rated and Below | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000193195 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000193195 | U.S. Treasury Securities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| C000193195 | Other Holdings Grouping | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (0.20%) |
| C000225825 | Santander Drive Auto Receivables Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000225825 | U.S. Treasury Bills | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000225825 | Exeter Automobile Receivables Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000225825 | Verus Securitization Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000225825 | Octane Receivables Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| C000225825 | Carvana Auto Receivables Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| C000225825 | Enterprise Fleet Financing | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000225825 | Targa Resources | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| C000225825 | Structured Agency Credit Risk Debt Notes | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| C000225825 | Bacardi-Martini | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000225825 | AAA Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 30.10% |
| C000225825 | AA Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.10% |
| C000225825 | A Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.30% |
| C000225825 | BBB Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 35.80% |
| C000225825 | BB Rated and Below | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000225825 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| C000225825 | U.S. Treasury Securities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| C000225825 | Other Holdings Grouping | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (0.20%) |
