| 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 |
| C000222038 | |
| Shareholder Report [Line Items] | |
| Fund Name | Short Duration Income Fund |
| Class Name | Investor Class |
| Trading Symbol | TSDLX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Short Duration Income 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 Short Duration Income Fund - Investor Class $20 0.40% |
| Expenses Paid, Amount | $ 20 |
| Expense Ratio, Percent | 0.40% |
| AssetsNet | $ 63,223,000 |
| Holdings Count | Holding | 428 |
| InvestmentCompanyPortfolioTurnover | 52% |
| Additional Fund Statistics Significance or Limits [Text Block] | What are some fund statistics? Fund Statistics Total Net Assets (000s) $63,223 Number of Portfolio Holdings 428 |
| Holdings [Text Block] | AAA Rated 17.8 % AA Rated 9.6 A Rated 19.8 BBB Rated 22.9 BB Rated and Below 9.1 Not Rated 1.2 U.S. Government Agency Securities 5.7 U.S. Treasury Securities 13.9 Reserves - |
| Largest Holdings [Text Block] | U.S. Treasury Notes 13.9 % Federal National Mortgage Assn. 3.3 BANK5 1.1 Federal Home Loan Mortgage 1.0 Sierra Timeshare Receivables Funding 1.0 Octane Receivables Trust 0.9 SMB Private Education Loan Trust 0.9 General Motors Financial 0.9 SBA Tower Trust 0.8 Santander Bank Auto Credit-Linked Notes 0.8 |
| Material Fund Change [Text Block] | |
| Updated Prospectus Web Address | www.troweprice.com/paperless |
| C000222039 | |
| Shareholder Report [Line Items] | |
| Fund Name | Short Duration Income Fund |
| Class Name | I Class |
| Trading Symbol | TSIDX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Short Duration Income 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 Short Duration Income Fund - I Class $15 0.29% |
| Expenses Paid, Amount | $ 15 |
| Expense Ratio, Percent | 0.29% |
| AssetsNet | $ 63,223,000 |
| Holdings Count | Holding | 428 |
| InvestmentCompanyPortfolioTurnover | 52% |
| Additional Fund Statistics Significance or Limits [Text Block] | What are some fund statistics? Fund Statistics Total Net Assets (000s) $63,223 Number of Portfolio Holdings 428 |
| Holdings [Text Block] | AAA Rated 17.8 % AA Rated 9.6 A Rated 19.8 BBB Rated 22.9 BB Rated and Below 9.1 Not Rated 1.2 U.S. Government Agency Securities 5.7 U.S. Treasury Securities 13.9 Reserves - |
| Largest Holdings [Text Block] | U.S. Treasury Notes 13.9 % Federal National Mortgage Assn. 3.3 BANK5 1.1 Federal Home Loan Mortgage 1.0 Sierra Timeshare Receivables Funding 1.0 Octane Receivables Trust 0.9 SMB Private Education Loan Trust 0.9 General Motors Financial 0.9 SBA Tower Trust 0.8 Santander Bank Auto Credit-Linked Notes 0.8 |
| Material Fund Change [Text Block] | |
| Updated Prospectus Web Address | www.troweprice.com/paperless |
| Shareholder Report, Holdings (Details) | Nov. 30, 2024 |
| C000222038 | U.S. Treasury Notes | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.90% |
| C000222038 | Federal National Mortgage Assn. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| C000222038 | BANK5 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| C000222038 | Federal Home Loan Mortgage | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000222038 | Sierra Timeshare Receivables Funding | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000222038 | Octane Receivables Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000222038 | SMB Private Education Loan Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000222038 | General Motors Financial | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000222038 | SBA Tower Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000222038 | Santander Bank Auto Credit-Linked Notes | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000222038 | AAA Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.80% |
| C000222038 | AA Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.60% |
| C000222038 | A Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.80% |
| C000222038 | BBB Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.90% |
| C000222038 | BB Rated and Below | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.10% |
| C000222038 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| C000222038 | U.S. Government Agency Securities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.70% |
| C000222038 | U.S. Treasury Securities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.90% |
| C000222038 | Other Holdings Grouping | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000222039 | U.S. Treasury Notes | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.90% |
| C000222039 | Federal National Mortgage Assn. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| C000222039 | BANK5 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| C000222039 | Federal Home Loan Mortgage | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000222039 | Sierra Timeshare Receivables Funding | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000222039 | Octane Receivables Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000222039 | SMB Private Education Loan Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000222039 | General Motors Financial | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000222039 | SBA Tower Trust | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000222039 | Santander Bank Auto Credit-Linked Notes | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000222039 | AAA Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.80% |
| C000222039 | AA Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.60% |
| C000222039 | A Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.80% |
| C000222039 | BBB Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.90% |
| C000222039 | BB Rated and Below | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.10% |
| C000222039 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| C000222039 | U.S. Government Agency Securities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.70% |
| C000222039 | U.S. Treasury Securities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.90% |
| C000222039 | Other Holdings Grouping | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
