Form N-CSR Cover
| 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
| 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 |
| C000005512 | |
| Shareholder Report [Line Items] | |
| Fund Name | Spectrum Income Fund |
| Class Name | Investor Class |
| Trading Symbol | RPSIX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Spectrum Income 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 Income Fund - Investor Class $31 0.62% |
| Expenses Paid, Amount | $ 31 |
| Expense Ratio, Percent | 0.62% |
| 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 | $ 5,872,816,000 |
| Holdings Count | Holding | 18 |
| InvestmentCompanyPortfolioTurnover | 8.80% |
| Additional Fund Statistics [Text Block] | What are some fund statistics? Fund Statistics Total Net Assets (000s) $5,872,816 Number of Portfolio Holdings 18 |
| Additional Fund Statistics Significance or Limits [Text Block] | Portfolio Turnover Rate 8.8% |
| Holdings [Text Block] | Asset Allocation Domestic Bond Funds 59.8 % International Bond Funds 29.5 Domestic Equity Funds 10.4 Short-Term and Other 0.3 |
| Largest Holdings [Text Block] | Top Ten Holdings T. Rowe Price High Yield Fund 14.7 % T. Rowe Price New Income Fund 11.9 T. Rowe Price GNMA Fund 10.5 T. Rowe Price Equity Income Fund 10.4 T. Rowe Price Emerging Markets Bond Fund 7.6 T. Rowe Price International Bond Fund (USD Hedged) 5.8 T. Rowe Price Floating Rate Fund 5.7 T. Rowe Price Short-Term Bond Fund 5.3 T. Rowe Price Dynamic Credit Fund 4.9 T. Rowe Price Dynamic Global Bond Fund 4.9 |
| 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> |
| C000227147 | |
| Shareholder Report [Line Items] | |
| Fund Name | Spectrum Income Fund |
| Class Name | I Class |
| Trading Symbol | TSPNX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Spectrum Income 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 Income Fund - I Class $23 0.47% |
| Expenses Paid, Amount | $ 23 |
| Expense Ratio, Percent | 0.47% |
| 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 | $ 5,872,816,000 |
| Holdings Count | Holding | 18 |
| InvestmentCompanyPortfolioTurnover | 8.80% |
| Additional Fund Statistics [Text Block] | What are some fund statistics? Fund Statistics Total Net Assets (000s) $5,872,816 Number of Portfolio Holdings 18 |
| Additional Fund Statistics Significance or Limits [Text Block] | Portfolio Turnover Rate 8.8% |
| Holdings [Text Block] | Asset Allocation Domestic Bond Funds 59.8 % International Bond Funds 29.5 Domestic Equity Funds 10.4 Short-Term and Other 0.3 |
| Largest Holdings [Text Block] | Top Ten Holdings T. Rowe Price High Yield Fund 14.7 % T. Rowe Price New Income Fund 11.9 T. Rowe Price GNMA Fund 10.5 T. Rowe Price Equity Income Fund 10.4 T. Rowe Price Emerging Markets Bond Fund 7.6 T. Rowe Price International Bond Fund (USD Hedged) 5.8 T. Rowe Price Floating Rate Fund 5.7 T. Rowe Price Short-Term Bond Fund 5.3 T. Rowe Price Dynamic Credit Fund 4.9 T. Rowe Price Dynamic Global Bond Fund 4.9 |
| 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 (D
| Shareholder Report, Holdings (Details) | Jun. 30, 2024 |
| C000005512 | T. Rowe Price High Yield Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.70% |
| C000005512 | T. Rowe Price New Income Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.90% |
| C000005512 | T. Rowe Price GNMA Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.50% |
| C000005512 | T. Rowe Price Equity Income Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.40% |
| C000005512 | T. Rowe Price Emerging Markets Bond Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| C000005512 | T. Rowe Price International Bond Fund (USD Hedged) | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.80% |
| C000005512 | T. Rowe Price Floating Rate Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.70% |
| C000005512 | T. Rowe Price Short-Term Bond Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000005512 | T. Rowe Price Dynamic Credit Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| C000005512 | T. Rowe Price Dynamic Global Bond Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| C000005512 | Domestic Bond Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 59.80% |
| C000005512 | International Bond Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 29.50% |
| C000005512 | Domestic Equity Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.40% |
| C000227147 | T. Rowe Price High Yield Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.70% |
| C000227147 | T. Rowe Price New Income Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.90% |
| C000227147 | T. Rowe Price GNMA Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.50% |
| C000227147 | T. Rowe Price Equity Income Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.40% |
| C000227147 | T. Rowe Price Emerging Markets Bond Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| C000227147 | T. Rowe Price International Bond Fund (USD Hedged) | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.80% |
| C000227147 | T. Rowe Price Floating Rate Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.70% |
| C000227147 | T. Rowe Price Short-Term Bond Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000227147 | T. Rowe Price Dynamic Credit Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| C000227147 | T. Rowe Price Dynamic Global Bond Fund | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| C000227147 | Domestic Bond Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 59.80% |
| C000227147 | International Bond Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 29.50% |
| C000227147 | Domestic Equity Funds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.40% |