| 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 RETIREMENT FUNDS, INC. |
| Entity Central Index Key | 0001177017 |
| 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 RETIREMENT FUNDS, INC. |
| Entity Central Index Key | 0001177017 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Nov. 30, 2024 |
| C000222714 | |
| Shareholder Report [Line Items] | |
| Fund Name | Retirement Blend 2040 Fund |
| Class Name | Investor Class |
| Trading Symbol | TRBLX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Retirement Blend 2040 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 Retirement Blend 2040 Fund - Investor Class $22 0.41% |
| Expenses Paid, Amount | $ 22 |
| Expense Ratio, Percent | 0.41% |
| AssetsNet | $ 412,166,000 |
| Holdings Count | Holding | 25 |
| InvestmentCompanyPortfolioTurnover | 8.30% |
| Additional Fund Statistics Significance or Limits [Text Block] | What are some fund statistics? Fund Statistics Total Net Assets (000s) $412,166 Number of Portfolio Holdings 25 |
| Holdings [Text Block] | Domestic Equity Funds 65.8 % International Equity Funds 23.5 Domestic Bond Funds 6.6 International Bond Funds 2.8 Short-Term and Other 1.3 |
| Largest Holdings [Text Block] | T. Rowe Price Equity Index 500 Fund 28.6 % T. Rowe Price International Equity Index Fund 11.9 T. Rowe Price Value Fund 10.0 T. Rowe Price Growth Stock Fund 8.9 T. Rowe Price Real Assets Fund 5.9 T. Rowe Price QM U.S. Bond Index Fund 4.0 T. Rowe Price International Value Equity Fund 3.8 T. Rowe Price Mid-Cap Index Fund 3.6 T. Rowe Price International Stock Fund 3.3 T. Rowe Price Small-Cap Index Fund 2.8 |
| Material Fund Change [Text Block] | |
| Updated Prospectus Web Address | www.troweprice.com/paperless |
| C000222715 | |
| Shareholder Report [Line Items] | |
| Fund Name | Retirement Blend 2040 Fund |
| Class Name | I Class |
| Trading Symbol | TBLJX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Retirement Blend 2040 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 Retirement Blend 2040 Fund - I Class $13 0.24% |
| Expenses Paid, Amount | $ 13 |
| Expense Ratio, Percent | 0.24% |
| AssetsNet | $ 412,166,000 |
| Holdings Count | Holding | 25 |
| InvestmentCompanyPortfolioTurnover | 8.30% |
| Additional Fund Statistics Significance or Limits [Text Block] | What are some fund statistics? Fund Statistics Total Net Assets (000s) $412,166 Number of Portfolio Holdings 25 |
| Holdings [Text Block] | Domestic Equity Funds 65.8 % International Equity Funds 23.5 Domestic Bond Funds 6.6 International Bond Funds 2.8 Short-Term and Other 1.3 |
| Largest Holdings [Text Block] | T. Rowe Price Equity Index 500 Fund 28.6 % T. Rowe Price International Equity Index Fund 11.9 T. Rowe Price Value Fund 10.0 T. Rowe Price Growth Stock Fund 8.9 T. Rowe Price Real Assets Fund 5.9 T. Rowe Price QM U.S. Bond Index Fund 4.0 T. Rowe Price International Value Equity Fund 3.8 T. Rowe Price Mid-Cap Index Fund 3.6 T. Rowe Price International Stock Fund 3.3 T. Rowe Price Small-Cap Index Fund 2.8 |
| Material Fund Change [Text Block] | |
| Updated Prospectus Web Address | www.troweprice.com/paperless |
| Shareholder Report, Holdings (Details) | Nov. 30, 2024 |
| C000222714 | T. Rowe Price Equity Index 500 Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.60% |
| C000222714 | T. Rowe Price International Equity Index Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.90% |
| C000222714 | T. Rowe Price Value Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10% |
| C000222714 | T. Rowe Price Growth Stock Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| C000222714 | T. Rowe Price Real Assets Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000222714 | T. Rowe Price QM U.S. Bond Index Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000222714 | T. Rowe Price International Value Equity Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000222714 | T. Rowe Price Mid-Cap Index Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000222714 | T. Rowe Price International Stock Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| C000222714 | T. Rowe Price Small-Cap Index Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000222714 | Domestic Equity Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 65.80% |
| C000222714 | International Equity Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.50% |
| C000222714 | Domestic Bond Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.60% |
| C000222714 | International Bond Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000222714 | Other Holdings Grouping | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000222715 | T. Rowe Price Equity Index 500 Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.60% |
| C000222715 | T. Rowe Price International Equity Index Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.90% |
| C000222715 | T. Rowe Price Value Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10% |
| C000222715 | T. Rowe Price Growth Stock Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| C000222715 | T. Rowe Price Real Assets Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000222715 | T. Rowe Price QM U.S. Bond Index Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000222715 | T. Rowe Price International Value Equity Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000222715 | T. Rowe Price Mid-Cap Index Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000222715 | T. Rowe Price International Stock Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| C000222715 | T. Rowe Price Small-Cap Index Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000222715 | Domestic Equity Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 65.80% |
| C000222715 | International Equity Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.50% |
| C000222715 | Domestic Bond Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.60% |
| C000222715 | International Bond Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000222715 | Other Holdings Grouping | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
