| 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 |
| C000129664 | |
| Shareholder Report [Line Items] | |
| Fund Name | Target 2020 Fund |
| Class Name | Investor Class |
| Trading Symbol | TRRUX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Target 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 Target 2020 Fund - Investor Class $25 0.48% |
| Expenses Paid, Amount | $ 25 |
| Expense Ratio, Percent | 0.48% |
| AssetsNet | $ 303,137,000 |
| Holdings Count | Holding | 27 |
| InvestmentCompanyPortfolioTurnover | 11% |
| Additional Fund Statistics Significance or Limits [Text Block] | What are some fund statistics? Fund Statistics Total Net Assets (000s) $303,137 Number of Portfolio Holdings 27 |
| Holdings [Text Block] | Domestic Bond Funds 43.4 % Domestic Equity Funds 30.7 International Bond Funds 14.5 International Equity Funds 9.5 Short-Term and Other 1.9 |
| Largest Holdings [Text Block] | T. Rowe Price Limited Duration Inflation Focused Bond Fund 19.7 % T. Rowe Price New Income Fund 16.0 T. Rowe Price Value Fund 6.0 T. Rowe Price International Bond Fund (USD Hedged) 5.7 T. Rowe Price Growth Stock Fund 5.5 T. Rowe Price Hedged Equity Fund 4.1 T. Rowe Price U.S. Large-Cap Core Fund 4.0 T. Rowe Price Dynamic Global Bond Fund 3.7 T. Rowe Price Emerging Markets Bond Fund 3.7 T. Rowe Price Equity Index 500 Fund 3.5 |
| Material Fund Change [Text Block] | |
| Updated Prospectus Web Address | www.troweprice.com/paperless |
| C000129665 | |
| Shareholder Report [Line Items] | |
| Fund Name | Target 2020 Fund |
| Class Name | Advisor Class |
| Trading Symbol | PAIRX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Target 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 Target 2020 Fund - Advisor Class $38 0.73% |
| Expenses Paid, Amount | $ 38 |
| Expense Ratio, Percent | 0.73% |
| AssetsNet | $ 303,137,000 |
| Holdings Count | Holding | 27 |
| InvestmentCompanyPortfolioTurnover | 11% |
| Additional Fund Statistics Significance or Limits [Text Block] | What are some fund statistics? Fund Statistics Total Net Assets (000s) $303,137 Number of Portfolio Holdings 27 |
| Holdings [Text Block] | Domestic Bond Funds 43.4 % Domestic Equity Funds 30.7 International Bond Funds 14.5 International Equity Funds 9.5 Short-Term and Other 1.9 |
| Largest Holdings [Text Block] | T. Rowe Price Limited Duration Inflation Focused Bond Fund 19.7 % T. Rowe Price New Income Fund 16.0 T. Rowe Price Value Fund 6.0 T. Rowe Price International Bond Fund (USD Hedged) 5.7 T. Rowe Price Growth Stock Fund 5.5 T. Rowe Price Hedged Equity Fund 4.1 T. Rowe Price U.S. Large-Cap Core Fund 4.0 T. Rowe Price Dynamic Global Bond Fund 3.7 T. Rowe Price Emerging Markets Bond Fund 3.7 T. Rowe Price Equity Index 500 Fund 3.5 |
| Material Fund Change [Text Block] | |
| Updated Prospectus Web Address | www.troweprice.com/paperless |
| C000169043 | |
| Shareholder Report [Line Items] | |
| Fund Name | Target 2020 Fund |
| Class Name | I Class |
| Trading Symbol | TTURX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Target 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-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 Target 2020 Fund - I Class $17 0.33% |
| Expenses Paid, Amount | $ 17 |
| Expense Ratio, Percent | 0.33% |
| AssetsNet | $ 303,137,000 |
| Holdings Count | Holding | 27 |
| InvestmentCompanyPortfolioTurnover | 11% |
| Additional Fund Statistics Significance or Limits [Text Block] | What are some fund statistics? Fund Statistics Total Net Assets (000s) $303,137 Number of Portfolio Holdings 27 |
| Holdings [Text Block] | Domestic Bond Funds 43.4 % Domestic Equity Funds 30.7 International Bond Funds 14.5 International Equity Funds 9.5 Short-Term and Other 1.9 |
| Largest Holdings [Text Block] | T. Rowe Price Limited Duration Inflation Focused Bond Fund 19.7 % T. Rowe Price New Income Fund 16.0 T. Rowe Price Value Fund 6.0 T. Rowe Price International Bond Fund (USD Hedged) 5.7 T. Rowe Price Growth Stock Fund 5.5 T. Rowe Price Hedged Equity Fund 4.1 T. Rowe Price U.S. Large-Cap Core Fund 4.0 T. Rowe Price Dynamic Global Bond Fund 3.7 T. Rowe Price Emerging Markets Bond Fund 3.7 T. Rowe Price Equity Index 500 Fund 3.5 |
| Material Fund Change [Text Block] | |
| Updated Prospectus Web Address | www.troweprice.com/paperless |
| Shareholder Report, Holdings (Details) | Nov. 30, 2024 |
| C000129664 | T. Rowe Price Limited Duration Inflation Focused Bond Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.70% |
| C000129664 | T. Rowe Price New Income Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16% |
| C000129664 | T. Rowe Price Value Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000129664 | T. Rowe Price International Bond Fund (USD Hedged) | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.70% |
| C000129664 | T. Rowe Price Growth Stock Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| C000129664 | T. Rowe Price Hedged Equity Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| C000129664 | T. Rowe Price U.S. Large-Cap Core Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000129664 | T. Rowe Price Dynamic Global Bond Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.70% |
| C000129664 | T. Rowe Price Emerging Markets Bond Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.70% |
| C000129664 | T. Rowe Price Equity Index 500 Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| C000129664 | Domestic Bond Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 43.40% |
| C000129664 | Domestic Equity Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 30.70% |
| C000129664 | International Bond Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.50% |
| C000129664 | International Equity Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.50% |
| C000129664 | Other Holdings Grouping | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| C000129665 | T. Rowe Price Limited Duration Inflation Focused Bond Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.70% |
| C000129665 | T. Rowe Price New Income Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16% |
| C000129665 | T. Rowe Price Value Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000129665 | T. Rowe Price International Bond Fund (USD Hedged) | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.70% |
| C000129665 | T. Rowe Price Growth Stock Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| C000129665 | T. Rowe Price Hedged Equity Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| C000129665 | T. Rowe Price U.S. Large-Cap Core Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000129665 | T. Rowe Price Dynamic Global Bond Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.70% |
| C000129665 | T. Rowe Price Emerging Markets Bond Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.70% |
| C000129665 | T. Rowe Price Equity Index 500 Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| C000129665 | Domestic Bond Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 43.40% |
| C000129665 | Domestic Equity Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 30.70% |
| C000129665 | International Bond Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.50% |
| C000129665 | International Equity Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.50% |
| C000129665 | Other Holdings Grouping | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| C000169043 | T. Rowe Price Limited Duration Inflation Focused Bond Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 19.70% |
| C000169043 | T. Rowe Price New Income Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16% |
| C000169043 | T. Rowe Price Value Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000169043 | T. Rowe Price International Bond Fund (USD Hedged) | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.70% |
| C000169043 | T. Rowe Price Growth Stock Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| C000169043 | T. Rowe Price Hedged Equity Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| C000169043 | T. Rowe Price U.S. Large-Cap Core Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000169043 | T. Rowe Price Dynamic Global Bond Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.70% |
| C000169043 | T. Rowe Price Emerging Markets Bond Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.70% |
| C000169043 | T. Rowe Price Equity Index 500 Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| C000169043 | Domestic Bond Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 43.40% |
| C000169043 | Domestic Equity Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 30.70% |
| C000169043 | International Bond Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.50% |
| C000169043 | International Equity Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.50% |
| C000169043 | Other Holdings Grouping | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
