| Form N-CSR Cover | 6 Months Ended |
| Jun. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | T. ROWE PRICE SPECTRUM FUND, INC. |
| Entity Central Index Key | 0000808303 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jun. 30, 2024 |
| Shareholder Report | 6 Months Ended |
| Jun. 30, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | T. ROWE PRICE SPECTRUM FUND, INC. |
| Entity Central Index Key | 0000808303 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jun. 30, 2024 |
| C000005514 | |
| Shareholder Report [Line Items] | |
| Fund Name | Spectrum International Equity Fund |
| Class Name | Investor Class |
| Trading Symbol | PSILX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Spectrum International Equity Fund (the "fund") for the period of January 1, 2024 to June 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</span>" id="sjs-B21"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 700; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify;">www.troweprice.com/prospectus</span> |
| 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 Spectrum International Equity Fund - Investor Class $45 0.89% |
| Expenses Paid, Amount | $ 45 |
| Expense Ratio, Percent | 0.89% |
| Updated Performance Information Location [Text Block] | If you invest directly with T. Rowe Price, you can elect to receive future shareholder reports or other important documents through electronic delivery by enrolling at www.troweprice.com/paperless |
| AssetsNet | $ 1,345,068,000 |
| Holdings Count | Holding | 12 |
| InvestmentCompanyPortfolioTurnover | 2% |
| Additional Fund Statistics [Text Block] | What are some fund statistics? Fund Statistics Total Net Assets (000s) $1,345,068 Number of Portfolio Holdings 12 |
| Additional Fund Statistics Significance or Limits [Text Block] | Portfolio Turnover Rate 2.0% |
| Holdings [Text Block] | Asset Allocation International Equity Funds 100.0 % Short-Term and Other - |
| Largest Holdings [Text Block] | Top Ten Holdings T. Rowe Price International Value Equity Fund 20.5 % T. Rowe Price International Stock Fund 18.1 T. Rowe Price European Stock Fund 16.5 T. Rowe Price Overseas Stock Fund 13.2 T. Rowe Price New Asia Fund 11.3 T. Rowe Price Emerging Markets Discovery Stock Fund 5.6 T. Rowe Price International Discovery Fund 4.9 T. Rowe Price Japan Fund 4.4 T. Rowe Price Emerging Markets Stock Fund 3.8 T. Rowe Price Latin America Fund 1.0 |
| Material Fund Change [Text Block] | |
| Updated Prospectus Web Address | www.troweprice.com/paperless</span>" id="sjs-B34"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 13.8667px; margin: 0px; overflow: visible; text-align: justify;">www.troweprice.com/paperless</span> |
| C000227149 | |
| Shareholder Report [Line Items] | |
| Fund Name | Spectrum International Equity Fund |
| Class Name | I Class |
| Trading Symbol | TSINX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Spectrum International Equity Fund (the "fund") for the period of January 1, 2024 to June 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-B45"><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</span>" id="sjs-B46"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 700; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify;">www.troweprice.com/prospectus</span> |
| 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 Spectrum International Equity Fund - I Class $38 0.74% |
| Expenses Paid, Amount | $ 38 |
| Expense Ratio, Percent | 0.74% |
| Updated Performance Information Location [Text Block] | If you invest directly with T. Rowe Price, you can elect to receive future shareholder reports or other important documents through electronic delivery by enrolling at www.troweprice.com/paperless |
| AssetsNet | $ 1,345,068,000 |
| Holdings Count | Holding | 12 |
| InvestmentCompanyPortfolioTurnover | 2% |
| Additional Fund Statistics [Text Block] | What are some fund statistics? Fund Statistics Total Net Assets (000s) $1,345,068 Number of Portfolio Holdings 12 |
| Additional Fund Statistics Significance or Limits [Text Block] | Portfolio Turnover Rate 2.0% |
| Holdings [Text Block] | Asset Allocation International Equity Funds 100.0 % Short-Term and Other - |
| Largest Holdings [Text Block] | Top Ten Holdings T. Rowe Price International Value Equity Fund 20.5 % T. Rowe Price International Stock Fund 18.1 T. Rowe Price European Stock Fund 16.5 T. Rowe Price Overseas Stock Fund 13.2 T. Rowe Price New Asia Fund 11.3 T. Rowe Price Emerging Markets Discovery Stock Fund 5.6 T. Rowe Price International Discovery Fund 4.9 T. Rowe Price Japan Fund 4.4 T. Rowe Price Emerging Markets Stock Fund 3.8 T. Rowe Price Latin America Fund 1.0 |
| Material Fund Change [Text Block] | |
| Updated Prospectus Web Address | www.troweprice.com/paperless</span>" id="sjs-B59"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 13.8667px; margin: 0px; overflow: visible; text-align: justify;">www.troweprice.com/paperless</span> |
| Shareholder Report, Holdings (Details) | Jun. 30, 2024 |
| C000005514 | T. Rowe Price International Value Equity Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.50% |
| C000005514 | T. Rowe Price International Stock Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.10% |
| C000005514 | T. Rowe Price European Stock Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.50% |
| C000005514 | T. Rowe Price Overseas Stock Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.20% |
| C000005514 | T. Rowe Price New Asia Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.30% |
| C000005514 | T. Rowe Price Emerging Markets Discovery Stock Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| C000005514 | T. Rowe Price International Discovery Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| C000005514 | T. Rowe Price Japan Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| C000005514 | T. Rowe Price Emerging Markets Stock Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000005514 | T. Rowe Price Latin America Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000005514 | International Equity Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 100% |
| C000227149 | T. Rowe Price International Value Equity Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.50% |
| C000227149 | T. Rowe Price International Stock Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.10% |
| C000227149 | T. Rowe Price European Stock Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.50% |
| C000227149 | T. Rowe Price Overseas Stock Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.20% |
| C000227149 | T. Rowe Price New Asia Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.30% |
| C000227149 | T. Rowe Price Emerging Markets Discovery Stock Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| C000227149 | T. Rowe Price International Discovery Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| C000227149 | T. Rowe Price Japan Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| C000227149 | T. Rowe Price Emerging Markets Stock Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000227149 | T. Rowe Price Latin America Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| C000227149 | International Equity Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 100% |
