| 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 |
| C000222706 | |
| Shareholder Report [Line Items] | |
| Fund Name | Retirement Blend 2020 Fund |
| Class Name | Investor Class |
| Trading Symbol | TSBAX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Retirement Blend 2020 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 2020 Fund - Investor Class $19 0.36% |
| Expenses Paid, Amount | $ 19 |
| Expense Ratio, Percent | 0.36% |
| AssetsNet | $ 227,468,000 |
| Holdings Count | Holding | 27 |
| InvestmentCompanyPortfolioTurnover | 12.20% |
| Additional Fund Statistics Significance or Limits [Text Block] | What are some fund statistics? Fund Statistics Total Net Assets (000s) $227,468 Number of Portfolio Holdings 27 |
| Holdings [Text Block] | Domestic Equity Funds 40.4 % Domestic Bond Funds 32.5 International Bond Funds 12.6 International Equity Funds 12.5 Short-Term and Other 2.0 |
| Largest Holdings [Text Block] | T. Rowe Price Equity Index 500 Fund 14.8 % T. Rowe Price QM U.S. Bond Index Fund 14.1 T. Rowe Price U.S. Limited Duration TIPS Index Fund 11.4 T. Rowe Price International Equity Index Fund 6.3 T. Rowe Price Hedged Equity Fund 5.3 T. Rowe Price Value Fund 5.3 T. Rowe Price International Bond Fund (USD Hedged) 5.1 T. Rowe Price Growth Stock Fund 4.7 T. Rowe Price Real Assets Fund 3.5 T. Rowe Price Dynamic Global Bond Fund 3.3 |
| Material Fund Change [Text Block] | |
| Updated Prospectus Web Address | www.troweprice.com/paperless |
| C000222707 | |
| Shareholder Report [Line Items] | |
| Fund Name | Retirement Blend 2020 Fund |
| Class Name | I Class |
| Trading Symbol | TBLDX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Retirement Blend 2020 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 2020 Fund - I Class $11 0.21% |
| Expenses Paid, Amount | $ 11 |
| Expense Ratio, Percent | 0.21% |
| AssetsNet | $ 227,468,000 |
| Holdings Count | Holding | 27 |
| InvestmentCompanyPortfolioTurnover | 12.20% |
| Additional Fund Statistics Significance or Limits [Text Block] | What are some fund statistics? Fund Statistics Total Net Assets (000s) $227,468 Number of Portfolio Holdings 27 |
| Holdings [Text Block] | Domestic Equity Funds 40.4 % Domestic Bond Funds 32.5 International Bond Funds 12.6 International Equity Funds 12.5 Short-Term and Other 2.0 |
| Largest Holdings [Text Block] | T. Rowe Price Equity Index 500 Fund 14.8 % T. Rowe Price QM U.S. Bond Index Fund 14.1 T. Rowe Price U.S. Limited Duration TIPS Index Fund 11.4 T. Rowe Price International Equity Index Fund 6.3 T. Rowe Price Hedged Equity Fund 5.3 T. Rowe Price Value Fund 5.3 T. Rowe Price International Bond Fund (USD Hedged) 5.1 T. Rowe Price Growth Stock Fund 4.7 T. Rowe Price Real Assets Fund 3.5 T. Rowe Price Dynamic Global Bond Fund 3.3 |
| Material Fund Change [Text Block] | |
| Updated Prospectus Web Address | www.troweprice.com/paperless |
| Shareholder Report, Holdings (Details) | Nov. 30, 2024 |
| C000222706 | T. Rowe Price Equity Index 500 Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.80% |
| C000222706 | T. Rowe Price QM U.S. Bond Index Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.10% |
| C000222706 | T. Rowe Price U.S. Limited Duration TIPS Index Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.40% |
| C000222706 | T. Rowe Price International Equity Index Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| C000222706 | T. Rowe Price Hedged Equity Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000222706 | T. Rowe Price Value Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000222706 | T. Rowe Price International Bond Fund (USD Hedged) | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.10% |
| C000222706 | T. Rowe Price Growth Stock Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000222706 | T. Rowe Price Real Assets Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| C000222706 | T. Rowe Price Dynamic Global Bond Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| C000222706 | Domestic Equity Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 40.40% |
| C000222706 | Domestic Bond Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 32.50% |
| C000222706 | International Bond Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.60% |
| C000222706 | International Equity Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.50% |
| C000222706 | Other Holdings Grouping | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| C000222707 | T. Rowe Price Equity Index 500 Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.80% |
| C000222707 | T. Rowe Price QM U.S. Bond Index Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.10% |
| C000222707 | T. Rowe Price U.S. Limited Duration TIPS Index Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.40% |
| C000222707 | T. Rowe Price International Equity Index Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| C000222707 | T. Rowe Price Hedged Equity Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000222707 | T. Rowe Price Value Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000222707 | T. Rowe Price International Bond Fund (USD Hedged) | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.10% |
| C000222707 | T. Rowe Price Growth Stock Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000222707 | T. Rowe Price Real Assets Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| C000222707 | T. Rowe Price Dynamic Global Bond Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| C000222707 | Domestic Equity Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 40.40% |
| C000222707 | Domestic Bond Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 32.50% |
| C000222707 | International Bond Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.60% |
| C000222707 | International Equity Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.50% |
| C000222707 | Other Holdings Grouping | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
