485BPOS

Registration Nos. 033-10992/811-4998

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933/X/

Post-Effective Amendment No. 45/X/

and/or

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940 /X/

Amendment No. 49/X/

T. ROWE PRICE SPECTRUM FUND, INC.

Exact Name of Registrant as Specified in Charter

100 East Pratt Street, Baltimore, Maryland 21202
Address of Principal Executive Offices

410-345-2000
Registrant’s Telephone Number, Including Area Code

David Oestreicher

100 East Pratt Street, Baltimore, Maryland 21202
Name and Address of Agent for Service

It is proposed that this filing will become effective (check appropriate box):

/X/Immediately upon filing pursuant to paragraph (b)

//On (date) pursuant to paragraph (b)

//60 days after filing pursuant to paragraph (a)(1)

//On (date) pursuant to paragraph (a)(1)

//75 days after filing pursuant to paragraph (a)(2)

//On (date) pursuant to paragraph (a)(2) of Rule 485

Page 2

If appropriate, check the following box:

//This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

Page 3

EXHIBITS

Exhibit	Exhibit No.
XBRL Instance Document	EX-101.INS
XBRL Taxonomy Extension Schema Document	EX-101.SCH
XBRL Taxonomy Extension Calculation Linkbase Document	EX-101.CAL
XBRL Taxonomy Extension Definition Linkbase Document	EX-101.DEF
XBRL Taxonomy Extension Labels Linkbase Document	EX-101.LAB
XBRL Taxonomy Extension Presentation Linkbase Document	EX-101.PRE

Page 4

Signatures

Pursuant to the requirements of the Securities Act of 1933, as amended, and the Investment Company Act of 1940, as amended, the Registrant certifies that it meets all of the requirements for effectiveness of this Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City of Baltimore, State of Maryland, this May 13, 2020.

T. ROWE PRICE SPECTRUM FUND, INC.

/s/David Oestreicher

By:David Oestreicher

Director and Executive Vice President

Pursuant to the requirements of the Securities Act of 1933, as amended, this Registration Statement has been signed below by the following persons in the capacities and on the dates indicated:

Signature	Title	Date
/s/David Oestreicher	Director (Principal Executive Officer)	May 13, 2020
David Oestreicher	and Executive Vice President
/s/Alan S. Dupski	Treasurer	May 13, 2020
Alan S. Dupski	(Principal Financial Officer)
	and Vice President
*
Teresa Bryce Bazemore	Director	May 13, 2020
*
Ronald J. Daniels	Director	May 13, 2020
*
Bruce W. Duncan	Director	May 13, 2020
*
Robert J. Gerrard, Jr.	Chairman of the Board	May 13, 2020
	and Director
*
Paul F. McBride	Director	May 13, 2020
*
Cecilia E. Rouse	Director	May 13, 2020
*
John G. Schreiber	Director	May 13, 2020

Page 5

/s/Robert W. Sharps	Director and Vice President	May 13, 2020
Robert W. Sharps
*/s/David Oestreicher	Attorney-In-Fact	May 13, 2020
David Oestreicher

Page 6

T. ROWE PRICE BALANCED FUND, INC.

T. ROWE PRICE BLUE CHIP GROWTH FUND, INC.

T. ROWE PRICE CAPITAL APPRECIATION FUND, INC.

T. ROWE PRICE CAPITAL OPPORTUNITY FUND, INC.

T. ROWE PRICE COMMUNICATIONS & TECHNOLOGY FUND, INC.

T. ROWE PRICE CORPORATE INCOME FUND, INC.

T. ROWE PRICE CREDIT OPPORTUNITIES FUND, INC.

T. ROWE PRICE DIVERSIFIED MID-CAP GROWTH FUND, INC.

T. ROWE PRICE DIVIDEND GROWTH FUND, INC.

T. ROWE PRICE EQUITY INCOME FUND, INC.

T. ROWE PRICE EQUITY SERIES, INC.

T. ROWE PRICE FINANCIAL SERVICES FUND, INC.

T. ROWE PRICE FIXED INCOME SERIES, INC.

T. ROWE PRICE FLOATING RATE FUND, INC.

T. ROWE PRICE GLOBAL ALLOCATION FUND, INC.

T. ROWE PRICE GLOBAL MULTI-SECTOR BOND FUND, INC.

T. ROWE PRICE GLOBAL REAL ESTATE FUND, INC.

T. ROWE PRICE GLOBAL TECHNOLOGY FUND, INC.

T. ROWE PRICE GNMA FUND, INC.

T. ROWE PRICE GOVERNMENT MONEY FUND, INC.

T. ROWE PRICE GROWTH & INCOME FUND, INC.

T. ROWE PRICE GROWTH STOCK FUND, INC.

T. ROWE PRICE HEALTH SCIENCES FUND, INC.

T. ROWE PRICE HIGH YIELD FUND, INC.

T. ROWE PRICE INDEX TRUST, INC.

T. ROWE PRICE INFLATION PROTECTED BOND FUND, INC.

T. ROWE PRICE INSTITUTIONAL EQUITY FUNDS, INC.

T. ROWE PRICE INSTITUTIONAL INCOME FUNDS, INC.

T. ROWE PRICE INSTITUTIONAL INTERNATIONAL FUNDS, INC.

T. ROWE PRICE INTERMEDIATE TAX-FREE HIGH YIELD FUND, INC.

T. ROWE PRICE INTERNATIONAL FUNDS, INC.

T. ROWE PRICE INTERNATIONAL INDEX FUND, INC.

T. ROWE PRICE INTERNATIONAL SERIES, INC.

T. ROWE PRICE LIMITED DURATION INFLATION FOCUSED BOND FUND, INC.

T. ROWE PRICE MID-CAP GROWTH FUND, INC.

T. ROWE PRICE MID-CAP VALUE FUND, INC.

T. ROWE PRICE MULTI-SECTOR ACCOUNT PORTFOLIOS, INC.

T. ROWE PRICE MULTI-STRATEGY TOTAL RETURN FUND, INC.

T. ROWE PRICE NEW AMERICA GROWTH FUND, INC.
T. ROWE PRICE NEW ERA FUND, INC.

T. ROWE PRICE NEW HORIZONS FUND, INC.

T. ROWE PRICE NEW INCOME FUND, INC.

T. ROWE PRICE PERSONAL STRATEGY FUNDS, INC.

T. ROWE PRICE QUANTITATIVE MANAGEMENT FUNDS, INC.

T. ROWE PRICE REAL ASSETS FUND, INC.

T. ROWE PRICE REAL ESTATE FUND, INC.

T. ROWE PRICE RESERVE INVESTMENT FUNDS, INC.

T. ROWE PRICE RETIREMENT FUNDS, INC.

T. ROWE PRICE SCIENCE & TECHNOLOGY FUND, INC.

T. ROWE PRICE SHORT-TERM BOND FUND, INC.

Page 7

T. ROWE PRICE SMALL-CAP STOCK FUND, INC.

T. ROWE PRICE SMALL-CAP VALUE FUND, INC.

T. ROWE PRICE SPECTRUM FUND, INC.

T. ROWE PRICE STATE TAX-FREE FUNDS, INC.

T. ROWE PRICE SUMMIT FUNDS, INC.

T. ROWE PRICE SUMMIT MUNICIPAL FUNDS, INC.

T. ROWE PRICE TAX-EFFICIENT FUNDS, INC.

T. ROWE PRICE TAX-EXEMPT MONEY FUND, INC.

T. ROWE PRICE TAX-FREE HIGH YIELD FUND, INC.

T. ROWE PRICE TAX-FREE INCOME FUND, INC.

T. ROWE PRICE TAX-FREE SHORT-INTERMEDIATE FUND, INC.

T. ROWE PRICE TOTAL RETURN FUND, INC.

T. ROWE PRICE U.S. BOND ENHANCED INDEX FUND, INC.

T. ROWE PRICE U.S. LARGE-CAP CORE FUND, INC.

T. ROWE PRICE U.S. TREASURY FUNDS, INC.

T. ROWE PRICE VALUE FUND, INC.

POWER OF ATTORNEY

RESOLVED, that the Corporation does hereby constitute and authorize Darrell N. Braman, Catherine D. Mathews, Margery K. Neale, and David Oestreicher, and each of them individually, their true and lawful attorneys and agents to take any and all action and execute any and all instruments which said attorneys and agents may deem necessary or advisable to enable the Corporation to comply with the Securities Act of 1933, as amended, and the Investment Company Act of 1940, as amended, and any rules, regulations, orders or other requirements of the United States Securities and Exchange Commission thereunder, in connection with the registration under the Securities Act of 1933, as amended, of shares of the Corporation, to be offered by the Corporation, and the registration of the Corporation under the Investment Company Act of 1940, as amended, including specifically, but without limitation of the foregoing, power and authority to sign the name of the Corporation on its behalf, and to sign the names of each of such directors and officers on his or her behalf as such director or officer to any (i) Registration Statement on Form N-1A or N-14 of the Corporation filed with the Securities and Exchange Commission under the Securities Act of 1933, as amended; (ii) Registration Statement on Form N-1A or N-14 of the Corporation under the Investment Company Act of 1940, as amended; (iii) amendment or supplement (including, but not limited to, Post-Effective Amendments adding additional series or classes of the Corporation) to said Registration Statement; and (iv) instruments or documents filed or to be filed as a part of or in connection with such Registration Statement, including Articles Supplementary, Articles of Amendment, and other instruments with respect to the Articles of Incorporation of the Corporation.

IN WITNESS WHEREOF, the above named Corporations have caused these presents to be signed and the same attested by its Assistant Secretary, each thereunto duly authorized by its Board of Directors, and each of the undersigned has hereunto set his or her hand and seal as of the day set opposite his or her name.

Page 8

/s/David Oestreicher
David Oestreicher /s/Catherine D. Mathews	Executive Vice President (Principal Executive Officer) Director	April 29, 2019
Catherine D. Mathews /s/Teresa Bryce Bazemore	Treasurer (Principal Financial Officer) Vice President	April 29, 2019
Teresa Bryce Bazemore /s/Ronald J. Daniels	Director	April 29, 2019
Ronald J. Daniels /s/Bruce W. Duncan	Director	April 29, 2019
Bruce W. Duncan /s/Robert J. Gerrard, Jr.	Director	April 29, 2019
Robert J. Gerrard, Jr. /s/Paul F. McBride	Director	April 29, 2019
Paul F. McBride /s/Cecilia E. Rouse	Director	April 29, 2019
Cecilia E. Rouse /s/John G. Schreiber	Director	April 29, 2019
John G. Schreiber /s/Robert W. Sharps	Director	April 29, 2019
Robert W. Sharps	Director	April 29, 2019

(Signatures Continued)

Page 9

ATTEST:

/s/Shannon Hofher Rauser

Shannon Hofher Rauser, Assistant Secretary

XML

Total

Spectrum Growth Fund

T. ROWE PRICE Spectrum Growth Fund SUMMARY

Investment Objective(s)

The fund seeks long-term capital appreciation

and growth of income with current income a secondary objective.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may also incur brokerage commissions and other charges when buying or selling shares of the fund, which are not reflected in the table.

Fees and Expenses of the Fund Shareholder fees (fees paid directly from your investment)

Shareholder Fees	Spectrum Growth Fund Spectrum Growth Fund USD ($)
Maximum account fee	$ 20	[1],[2]

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Spectrum Growth Fund Spectrum Growth Fund	[1]
Management fees
Distribution and service (12b-1) fees
Other expenses
Acquired fund fees and expenses	0.76%
Total annual fund operating expenses	0.76%

Example

This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods, that your investment has a 5% return each year, and that the fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example	1 year	3 years	5 years	10 years
Spectrum Growth Fund | Spectrum Growth Fund | USD ($)	78	243	422	942

Portfolio Turnover

The fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund’s performance. During the most recent fiscal year, the fund’s portfolio turnover rate was 19.3% of the average value of its portfolio.

Investments, Risks, and Performance Principal Investment Strategies

The fund broadly diversifies its assets among a set of T. Rowe Price mutual funds representing specific market segments. The fund, which normally invests in a variety of domestic and international equity funds and, from time to time, a money market fund, seeks to maintain broad exposure to several markets in an attempt to reduce the impact of markets that are declining and to benefit from good performance in particular market segments over time.

The fund can invest in funds holding U.S. and international stocks; stocks of companies involved in activities related to commodities and other real assets; small-cap, mid-cap, and large-cap stocks; and growth and value stocks.

Within the ranges shown in the following table, the portfolio manager decides how much of the fund’s assets to allocate to underlying fund investments based on the outlook for, and on the relative valuations of, the underlying funds and the various markets in which they invest.

Asset Allocation Ranges for Underlying Funds

Spectrum Growth Fund	Investment Range
Blue Chip Growth	5%-25	%
Dividend Growth	0%-25	%
Emerging Markets Stock	0%-10	%
Equity Income	5%-25	%
Growth & Income	0%-25	%
Growth Stock	5%-25	%
International Discovery	0%-10	%
International Stock	0%-20	%
International Value Equity	0%-20	%
Mid-Cap Growth	0%-15	%
Mid-Cap Value	0%-15	%
New Horizons	0%-15	%
Real Assets	0%-10	%
Small-Cap Value	0%-15	%
U.S. Treasury Money	0%-25	%
Value	5%-25	%

The fund may sell shares of the underlying funds for a variety of reasons, such as to secure gains, limit losses, or redeploy assets into more promising opportunities.

Principal Risks

As with any fund, there is no guarantee that the fund will achieve its objective(s). The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund, which may be even greater during periods of market disruption or volatility, are summarized as follows:

Market conditions The value of the fund’s investments may decrease, sometimes rapidly or unexpectedly, due to factors affecting an issuer held by the fund, particular industries, or the overall securities markets. A variety of factors can increase the volatility of the fund’s holdings and markets generally, including political or regulatory developments, recessions, inflation, rapid interest rate changes, war or acts of terrorism, natural disasters, and outbreaks of infectious illnesses or other widespread public health issues. Certain events may cause instability across global markets, including reduced liquidity and disruptions in trading markets, while some events may affect certain geographic regions, countries, sectors, and industries more significantly than others. These adverse developments may cause broad declines in market value due to short-term market movements or for significantly longer periods during more prolonged market downturns.

Asset allocation The fund’s overall level of risk will directly correspond to the risks of the underlying funds in which it invests. By investing in many underlying funds, the fund has partial exposure to the risks of different areas of the market. However, the selection of the underlying funds and the allocation of the fund’s assets among the various asset classes, market sectors, and investment styles represented by those underlying funds could cause the fund to underperform other funds with a similar benchmark or investment objective.

Investments in other funds The fund bears the risk that its underlying funds will fail to successfully employ their investment strategies. One or more underlying fund’s underperformance or failure to meet its investment objectives as intended could cause the fund to underperform similarly managed funds.

Stock exposure An underlying stock fund’s share price can fall because of weakness in the overall stock markets, a particular industry, or specific holdings. Stocks generally fluctuate in value more than bonds and may decline significantly over short time periods. There is a chance that stock prices overall will decline because stock markets tend to move in cycles, with periods of rising and falling prices. The value of an underlying stock fund may decline due to general weakness or volatility in the stock markets, adverse conditions impacting a particular industry or market sector, or factors affecting an investment style or market capitalization targeted by the fund.

International investing Investing in funds that hold the securities of non-U.S. issuers involves special risks not typically associated with investing in funds that hold securities of U.S. issuers. Non-U.S. securities tend to be more volatile and have lower overall liquidity than investments in U.S. securities and may lose value because of adverse local, political, social, or economic developments overseas, or due to changes in the exchange rates between foreign currencies and the U.S. dollar. In addition, investments outside the U.S. are subject to settlement practices and regulatory and financial reporting standards that differ from those of the U.S. The risks of investing outside the U.S. are heightened for any investments in emerging markets, which are susceptible to greater volatility than investments in developed markets.

Emerging markets Investing in funds that hold securities of issuers in emerging market countries involve greater risk and overall volatility than investing in funds that hold securities of issuers in the U.S. and developed markets. Emerging market countries tend to have economic structures that are less diverse and mature, and political systems that are less stable, than those of developed countries. In addition to the risks normally associated with investing outside the U.S., emerging markets are more susceptible to governmental interference, political and economic uncertainty, local taxes and restrictions on an underlying fund’s investments, less efficient trading markets with lower overall liquidity, and more volatile currency exchange rates.

Market capitalization Because the fund invests in certain funds that focus on a particular market capitalization, its share price may be negatively affected if investing in that market capitalization falls out of favor. Small- and mid-cap companies often have less experienced management, more limited financial resources, and less publicly available information than larger companies, and tend to be more sensitive to changes in overall economic conditions. As a result, investments in small-cap and mid-cap companies are likely to be more volatile than investments in larger companies. However, larger companies may not be able to attain the high growth rates of successful smaller companies, especially during strong economic periods, and they may be less capable of responding quickly to competitive challenges and industry changes.

Investment style Because the fund invests in certain funds that focus on growth stocks and certain funds that focus on value stocks, its share price may be negatively affected if either investing approach falls out of favor. Growth stocks tend to be more volatile than the overall stock market and are more sensitive to changes in current or expected earnings. Value stocks carry the risk that investors will not recognize their intrinsic value for a long time or that they are actually appropriately priced at a low level.

Dividend-paying stocks To the extent the fund invests in an underlying fund that focuses on dividend-paying stocks, it is exposed to greater volatility and the risk of stock market declines that could cause the fund to underperform funds with similar objectives. Stocks of established companies paying high dividends may not participate in a broad market advance to the same degree as most other stocks, and a sharp rise in interest rates could cause a company to reduce or eliminate its dividend.

Money market investments An underlying money market fund may not be able to maintain a stable $1.00 share price at all times. If a money market fund fails to maintain a stable net asset value, or if there is a perceived threat that a money market fund is likely to fail to maintain a stable net asset value, the underlying fund could experience significant redemption activity.

Performance

The following performance information provides some indication of the risks of investing in the fund. The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund.

SPECTRUM GROWTH FUND Calendar Year Returns

	Quarter Ended	Total Return		Quarter Ended	Total Return
Best Quarter	3/31/12	14.29%	Worst Quarter	9/30/11	-16.95%

The following table shows the average annual total returns for the fund, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund, if applicable.

In addition, the table shows hypothetical after-tax returns to demonstrate how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or an IRA.

Average Annual Total Returns Periods ended December 31, 2019

Average Annual Total Returns - Spectrum Growth Fund		1 Year	5 Years	10 Years	Inception date
Spectrum Growth Fund		27.03%	9.64%	11.09%	Jun. 29, 1990
Spectrum Growth Fund | Returns after taxes on distributions		24.46%	7.30%	9.52%	Jun. 29, 1990
Spectrum Growth Fund | Returns after taxes on distributions and sale of fund shares		17.73%	7.21%	8.89%	Jun. 29, 1990
Russell 3000® Index (reflects no deduction for fees, expenses, or taxes)		31.02%	11.24%	13.42%
Combined Index Portfolio Net (reflects no deduction for fees or expenses)	[1]	28.16%	9.61%	11.08%
S&P 500 Index (reflects no deduction for fees, expenses, or taxes)		31.49%	11.70%	13.56%
Lipper Multi-Cap Core Funds Index		29.31%	9.73%	11.82%

Updated performance information is available through troweprice.com.

[1] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.

[2] While the fund itself charges no management fee, it will indirectly bear its pro-rata share of the expenses of the underlying T. Rowe Price funds in which it invests (acquired funds). The acquired funds are expected to bear the operating expenses of the fund.

[1] While the fund itself charges no management fee, it will indirectly bear its pro-rata share of the expenses of the underlying T. Rowe Price funds in which it invests (acquired funds). The acquired funds are expected to bear the operating expenses of the fund.

[1] Combined Index Portfolio Net is an unmanaged blended benchmark that from 9/1/08 through 4/30/11, was composed of 80% the Russell 3000® Index and 20% the MSCI All Country World ex USA Index Net. From 5/1/11 through 7/31/12, the blended benchmark was composed of the Russell 3000® Index (ranging from 79%-71.01%) and the MSCI All Country World ex USA Index Net (ranging from 21%-28.99%). From 8/1/12 through 3/10/15, the blended benchmark was composed of 70% the Russell 3000® Index and 30% the MSCI All Country World ex USA Index Net. Since 3/11/15, the blended benchmark has been composed of 70% the Russell 3000® Index and 30% the MSCI All Country World Index ex USA Investable Market Index Net. The indices and percentages may vary over time.

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	T. Rowe Price Spectrum Fund, Inc.
Prospectus Date	rr_ProspectusDate	May 01, 2020
Document Creation Date	dei_DocumentCreationDate	Apr. 30, 2020

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

T. Rowe Price Spectrum Fund, Inc.

Prospectus Date

rr_ProspectusDate

May 01, 2020

Spectrum Income Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

T. ROWE PRICE Spectrum Income Fund SUMMARY

Objective [Heading]

rr_ObjectiveHeading

Investment Objective(s)

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks a high level of current income with moderate share price fluctuation.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may also incur brokerage commissions and other charges when buying or selling shares of the fund, which are not reflected in the table.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Fees and Expenses of the Fund Shareholder fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund’s performance. During the most recent fiscal year, the fund’s portfolio turnover rate was 24.1% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

24.10%

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods, that your investment has a 5% return each year, and that the fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Investments, Risks, and Performance Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The fund broadly diversifies its assets among a set of T. Rowe Price mutual funds representing specific market segments. The fund, which normally invests in a variety of domestic and international bond funds, a money market fund, and an income-oriented stock fund, seeks to maintain broad exposure to several markets in an attempt to reduce the impact of markets that are declining and to benefit from good performance in particular market segments over time.

The fund can invest in funds holding high-quality domestic and foreign bonds, high-yield bonds (“junk” bonds), short- and long-term securities, dividend-paying stocks and other instruments (such as bank loans).

Within the ranges shown in the following table, the portfolio manager decides how much of the fund’s assets to allocate to underlying fund investments based on the outlook for, and on the relative valuations of, the underlying funds and the various markets in which they invest.

Asset Allocation Ranges for Underlying Funds

Spectrum Income Fund	Investment Range
Corporate Income	0%-10	%
Dynamic Global Bond	0%-10	%
Emerging Markets Bond	0%-20	%
Emerging Markets Local Currency Bond	0%-10	%
Equity Income	5%-25	%
Floating Rate	0%-15	%
GNMA	5%-20	%
High Yield	5%-25	%
Inflation Protected Bond	0%-10	%
International Bond	0%-15	%
International Bond (USD Hedged)	0%-20	%
Limited Duration Inflation Focused Bond	0%-10	%
New Income	10%-30	%
Short-Term Bond	0%-15	%
U.S. Treasury Intermediate	0%-10	%
U.S. Treasury Long-Term	0%-15	%
U.S. Treasury Money	0%-25	%
Ultra Short-Term Bond	0%-10	%

The fund may sell shares of the underlying funds for a variety of reasons, such as to secure gains, limit losses, or redeploy assets into more promising opportunities.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

As with any fund, there is no guarantee that the fund will achieve its objective(s). The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund, which may be even greater during periods of market disruption or volatility, are summarized as follows:

Market conditions The value of the fund’s investments may decrease, sometimes rapidly or unexpectedly, due to factors affecting an issuer held by the fund, particular industries, or the overall securities markets. A variety of factors can increase the volatility of the fund’s holdings and markets generally, including political or regulatory developments, recessions, inflation, rapid interest rate changes, war or acts of terrorism, natural disasters, and outbreaks of infectious illnesses or other widespread public health issues. Certain events may cause instability across global markets, including reduced liquidity and disruptions in trading markets, while some events may affect certain geographic regions, countries, sectors, and industries more significantly than others. These adverse developments may cause broad declines in market value due to short-term market movements or for significantly longer periods during more prolonged market downturns.

Asset allocation The fund’s overall level of risk will directly correspond to the risks of the underlying funds in which it invests. By investing in many underlying funds, the fund has partial exposure to the risks of different areas of the market. However, the selection of the underlying funds and the allocation of the fund’s assets among the various asset classes, market sectors, and investment styles represented by those underlying funds could cause the fund to underperform other funds with a similar benchmark or investment objective.

Investments in other funds The fund bears the risk that its underlying funds will fail to successfully employ their investment strategies. One or more underlying fund’s underperformance or failure to meet its investment objectives as intended could cause the fund to underperform similarly managed funds.

Bond exposure An underlying bond fund’s share price can fall because of various factors affecting bonds or due to general weakness in the overall bond markets. The fund invests in underlying funds with varying levels of credit risk, interest rate risk, and liquidity risk. At times, participants in bond markets may develop concerns about the ability of certain issuers to make timely principal and interest payments, or they may develop concerns about the ability of financial institutions that make markets in certain debt instruments to facilitate an orderly market. Those concerns could cause increased volatility and reduced liquidity in particular securities or in the overall bond markets and the related derivatives markets, which could hamper an underlying fund’s ability to sell the bonds in which it invests or to find and purchase suitable investments.

Interest rates The prices of, and the income generated by, bonds and other debt instruments held by an underlying fund may be affected by changes in interest rates. A rise in interest rates typically causes the price of a fixed rate debt instrument to fall and its yield to rise. Conversely, a decline in interest rates typically causes the price of a fixed rate debt instrument to rise and the yield to fall. Generally, underlying bond funds with longer weighted average maturities and durations carry greater interest rate risk.

Prepayments and extensions Underlying funds that invest in mortgage-backed securities, other asset-backed securities, or any debt instrument with an embedded call option are subject to prepayment risks because the principal on the security may be prepaid at any time, which could reduce the security’s yield and market value. The rate of prepayments tends to increase as interest rates fall, which could cause the average maturity of the underlying fund’s portfolio to shorten. Extension risk may result from a rise in interest rates, which tends to make mortgage-backed securities, asset-backed securities, and other callable debt instruments more volatile.

Junk investing Investments in bonds that are rated below investment grade, commonly referred to as junk bonds, and loans that are rated below investment grade, expose an underlying fund to greater volatility and credit risk than investments in securities that are rated investment-grade. Issuers of junk bonds and loans are usually not as strong financially and are more likely to suffer an adverse change in financial condition that would result in the inability to meet a financial obligation. As a result, bonds and loans rated below investment grade carry a higher risk of default and should be considered speculative.

Credit quality An issuer of a debt instrument held by an underlying fund could suffer an adverse change in financial condition that results in a payment default (failure to make scheduled interest or principal payments), rating downgrade, or inability to meet a financial obligation. The fund’s exposure to credit risk is increased to the extent the fund invests in underlying funds that hold securities that are not considered investment-grade. Holdings that are rated below investment grade carry greater risk of default and erratic price swings due, in part, to potentially adverse changes in the credit quality of the issuer.

International investing Investing in funds that hold the securities of non-U.S. issuers involves special risks not typically associated with investing in funds that hold securities of U.S. issuers. Non-U.S. securities tend to be more volatile and have lower overall liquidity than investments in U.S. securities and may lose value because of adverse local, political, social, or economic developments overseas, or due to changes in the exchange rates between foreign currencies and the U.S. dollar. In addition, investments outside the U.S. are subject to settlement practices and regulatory and financial reporting standards that differ from those of the U.S. The risks of investing outside the U.S. are heightened for any investments in emerging markets, which are susceptible to greater volatility than investments in developed markets.

Emerging markets Investing in funds that hold securities of issuers in emerging market countries involve greater risk and overall volatility than investing in funds that hold securities of issuers in the U.S. and developed markets. Emerging market countries tend to have economic structures that are less diverse and mature, and political systems that are less stable, than those of developed countries. In addition to the risks normally associated with investing outside the U.S., emerging markets are more susceptible to governmental interference, political and economic uncertainty, local taxes and restrictions on an underlying fund’s investments, less efficient trading markets with lower overall liquidity, and more volatile currency exchange rates.

Bank loans Underlying funds that invest in bank loans expose the fund to additional risks beyond those normally associated with more traditional debt instruments. An underlying fund’s ability to receive payments in connection with a loan depends primarily on the financial condition of the borrower and whether or not a loan is secured by collateral, although there is no assurance that the collateral securing a loan will be sufficient to satisfy the loan obligation. In addition, bank loans often have contractual restrictions on resale, which can delay the sale and adversely impact the sale price and have significantly longer settlement periods than more traditional investments. Bank loans often involve borrowers whose financial condition is troubled or highly leveraged, which increases an underlying fund’s risk that the fund may not receive its proceeds in a timely manner or that the fund may incur losses in order to pay redemption proceeds to its shareholders.

Dividend-paying stocks To the extent the fund invests in an underlying fund that focuses on dividend-paying stocks, it is exposed to greater volatility and the risk of stock market declines that could cause the fund to underperform funds with similar objectives. Stocks of established companies paying high dividends may not participate in a broad market advance to the same degree as most other stocks, and a sharp rise in interest rates could cause a company to reduce or eliminate its dividend.

Liquidity An underlying fund may not be able to meet requests to redeem shares without significant dilution of the remaining shareholders’ interest in the fund. A particular investment or an entire market segment may become less liquid or even illiquid, sometimes abruptly, which could limit a fund’s ability to purchase or sell holdings in a timely manner at a desired price. Reduced liquidity can result from a number of events, such as limited trading activity, reductions in bond inventory, and rapid or unexpected changes in interest rates. Large redemptions may also have a negative impact on an underlying fund’s overall liquidity.

Money market investments An underlying money market fund may not be able to maintain a stable $1.00 share price at all times. If a money market fund fails to maintain a stable net asset value, or if there is a perceived threat that a money market fund is likely to fail to maintain a stable net asset value, the underlying fund could experience significant redemption activity.

Risk Lose Money [Text]

rr_RiskLoseMoney

The fund’s share price fluctuates, which means you could lose money by investing in the fund.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following performance information provides some indication of the risks of investing in the fund. The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following performance information provides some indication of the risks of investing in the fund. The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund. The following table shows the average annual total returns for the fund, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund, if applicable.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

troweprice.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

Bar Chart [Heading]

rr_BarChartHeading

SPECTRUM INCOME FUND Calendar Year Returns

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

	Quarter Ended	Total Return		Quarter Ended	Total Return
Best Quarter	9/30/10	5.64%	Worst Quarter	9/30/11	-3.56%

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns Periods ended December 31, 2019

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or an IRA.

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

The following table shows the average annual total returns for the fund, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund, if applicable.

In addition, the table shows hypothetical after-tax returns to demonstrate how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or an IRA.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

Updated performance information is available through troweprice.com.

Spectrum Income Fund | Spectrum Income Fund

Risk/Return:

rr_RiskReturnAbstract

Maximum account fee

rr_MaximumAccountFee

$ 20

^[1],[2]

Management fees

rr_ManagementFeesOverAssets

^[2]

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

^[2]

Other expenses

rr_OtherExpensesOverAssets

^[2]

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.63%

^[2]

Total annual fund operating expenses

rr_ExpensesOverAssets

0.63%

^[2]

1 year

rr_ExpenseExampleYear01

$ 64

3 years

rr_ExpenseExampleYear03

202

5 years

rr_ExpenseExampleYear05

351

10 years

rr_ExpenseExampleYear10

$ 786

2010

rr_AnnualReturn2010

9.68%

2011

rr_AnnualReturn2011

4.16%

2012

rr_AnnualReturn2012

10.16%

2013

rr_AnnualReturn2013

3.02%

2014

rr_AnnualReturn2014

3.88%

2015

rr_AnnualReturn2015

(2.02%)

2016

rr_AnnualReturn2016

8.18%

2017

rr_AnnualReturn2017

7.02%

2018

rr_AnnualReturn2018

(2.62%)

2019

rr_AnnualReturn2019

11.55%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2010

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

5.64%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(3.56%)

1 Year

rr_AverageAnnualReturnYear01

11.55%

5 Years

rr_AverageAnnualReturnYear05

4.26%

10 Years

rr_AverageAnnualReturnYear10

5.19%

Inception date

rr_AverageAnnualReturnInceptionDate

Jun. 29, 1990

Spectrum Income Fund | Returns after taxes on distributions | Spectrum Income Fund

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

9.97%

5 Years

rr_AverageAnnualReturnYear05

2.68%

10 Years

rr_AverageAnnualReturnYear10

3.58%

Inception date

rr_AverageAnnualReturnInceptionDate

Jun. 29, 1990

Spectrum Income Fund | Returns after taxes on distributions and sale of fund shares | Spectrum Income Fund

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

6.96%

5 Years

rr_AverageAnnualReturnYear05

2.66%

10 Years

rr_AverageAnnualReturnYear10

3.44%

Inception date

rr_AverageAnnualReturnInceptionDate

Jun. 29, 1990

Spectrum Income Fund | Bloomberg Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

8.72%

5 Years

rr_AverageAnnualReturnYear05

3.05%

10 Years

rr_AverageAnnualReturnYear10

3.75%

Spectrum Income Fund | Lipper Multi-Sector Income Funds Average

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

9.77%

5 Years

rr_AverageAnnualReturnYear05

3.91%

10 Years

rr_AverageAnnualReturnYear10

5.18%

[1] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.

[2] While the fund itself charges no management fee, it will indirectly bear its pro-rata share of the expenses of the underlying T. Rowe Price funds in which it invests (acquired funds). The acquired funds are expected to bear the operating expenses of the fund.

XML

Total

Spectrum International Fund

T. ROWE PRICE Spectrum International Fund SUMMARY

Investment Objective(s)

The fund seeks long-term capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may also incur brokerage commissions and other charges when buying or selling shares of the fund, which are not reflected in the table.

Fees and Expenses of the Fund Shareholder fees (fees paid directly from your investment)

Shareholder Fees	Spectrum International Fund Spectrum International Fund USD ($)
Maximum account fee	$ 20	[1],[2]

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Spectrum International Fund Spectrum International Fund	[1]
Management fees
Distribution and service (12b-1) fees
Other expenses
Acquired fund fees and expenses	0.90%
Total annual fund operating expenses	0.90%

Example

This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods, that your investment has a 5% return each year, and that the fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example	1 year	3 years	5 years	10 years
Spectrum International Fund | Spectrum International Fund | USD ($)	92	287	498	1,108

Portfolio Turnover

The fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund’s performance. During the most recent fiscal year, the fund’s portfolio turnover rate was 12.7% of the average value of its portfolio.

Investments, Risks, and Performance Principal Investment Strategies

The fund broadly diversifies its assets among a set of T. Rowe Price mutual funds representing specific market segments outside the U.S. The fund, which normally invests in a variety of developed and emerging market equity funds, and, from time to time, a money market fund, seeks to maintain broad exposure to several markets in an attempt to reduce the impact of markets that are declining and to benefit from good performance in particular market segments over time.

The fund can invest in stock funds that have holdings in many different developed foreign countries, as well as emerging markets. The fund’s overall allocation to international stock funds is represented by a diversified mix of funds that employ both growth and value investment approaches and consists of large-cap, mid-cap, and small-cap stocks.

Within the ranges shown in the following table, the portfolio manager decides how much of the fund’s assets to allocate to underlying fund investments based on the outlook for, and on the relative valuations of, the underlying funds and the various markets in which they invest.

Asset Allocation Ranges for Underlying Funds

Spectrum International Fund	Investment Range
Africa & Middle East	0%-15	%
Emerging Europe	0%-15	%
Emerging Markets Discovery Stock	0%-10	%
Emerging Markets Stock	0%-10	%
European Stock	0%-30	%
International Discovery	0%-20	%
International Stock	0%-55	%
International Value Equity	0%-35	%
Japan	0%-30	%
Latin America	0%-15	%
New Asia	0%-20	%
Overseas Stock	0%-35	%
U.S. Treasury Money	0%-25	%

The fund may sell shares of the underlying funds for a variety of reasons, such as to secure gains, limit losses, or redeploy assets into more promising opportunities.

Principal Risks

As with any fund, there is no guarantee that the fund will achieve its objective(s). The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund, which may be even greater during periods of market disruption or volatility, are summarized as follows:

Market conditions The value of the fund’s investments may decrease, sometimes rapidly or unexpectedly, due to factors affecting an issuer held by the fund, particular industries, or the overall securities markets. A variety of factors can increase the volatility of the fund’s holdings and markets generally, including political or regulatory developments, recessions, inflation, rapid interest rate changes, war or acts of terrorism, natural disasters, and outbreaks of infectious illnesses or other widespread public health issues. Certain events may cause instability across global markets, including reduced liquidity and disruptions in trading markets, while some events may affect certain geographic regions, countries, sectors, and industries more significantly than others. These adverse developments may cause broad declines in market value due to short-term market movements or for significantly longer periods during more prolonged market downturns.

Asset allocation The fund’s overall level of risk will directly correspond to the risks of the underlying funds in which it invests. By investing in many underlying funds, the fund has partial exposure to the risks of different areas of the market. However, the selection of the underlying funds and the allocation of the fund’s assets among the various asset classes, market sectors, and investment styles represented by those underlying funds could cause the fund to underperform other funds with a similar benchmark or investment objective.

Investments in other funds The fund bears the risk that its underlying funds will fail to successfully employ their investment strategies. One or more underlying fund’s underperformance or failure to meet its investment objectives as intended could cause the fund to underperform similarly managed funds.

International investing Investing in funds that hold the securities of non-U.S. issuers involves special risks not typically associated with investing in funds that hold securities of U.S. issuers. Non-U.S. securities tend to be more volatile and have lower overall liquidity than investments in U.S. securities and may lose value because of adverse local, political, social, or economic developments overseas, or due to changes in the exchange rates between foreign currencies and the U.S. dollar. In addition, investments outside the U.S. are subject to settlement practices and regulatory and financial reporting standards that differ from those of the U.S. The risks of investing outside the U.S. are heightened for any investments in emerging markets, which are susceptible to greater volatility than investments in developed markets.

Emerging markets Investing in funds that hold securities of issuers in emerging market countries involve greater risk and overall volatility than investing in funds that hold securities of issuers in the U.S. and developed markets. Emerging market countries tend to have economic structures that are less diverse and mature, and political systems that are less stable, than those of developed countries. In addition to the risks normally associated with investing outside the U.S., emerging markets are more susceptible to governmental interference, political and economic uncertainty, local taxes and restrictions on an underlying fund’s investments, less efficient trading markets with lower overall liquidity, and more volatile currency exchange rates.

Stock exposure An underlying stock fund’s share price can fall because of weakness in the overall stock markets, a particular industry, or specific holdings. Stocks generally fluctuate in value more than bonds and may decline significantly over short time periods. There is a chance that stock prices overall will decline because stock markets tend to move in cycles, with periods of rising and falling prices. The value of an underlying stock fund may decline due to general weakness or volatility in the stock markets, adverse conditions impacting a particular industry or market sector, or factors affecting an investment style or market capitalization targeted by the fund.

Market capitalization Because the fund invests in certain funds that focus on a particular market capitalization, its share price may be negatively affected if investing in that market capitalization falls out of favor. Small- and mid-cap companies often have less experienced management, more limited financial resources, and less publicly available information than larger companies, and tend to be more sensitive to changes in overall economic conditions. As a result, investments in small-cap and mid-cap companies are likely to be more volatile than investments in larger companies. However, larger companies may not be able to attain the high growth rates of successful smaller companies, especially during strong economic periods, and they may be less capable of responding quickly to competitive challenges and industry changes.

Investment style Because the fund invests in certain funds that focus on growth stocks and certain funds that focus on value stocks, its share price may be negatively affected if either investing approach falls out of favor. Growth stocks tend to be more volatile than the overall stock market and are more sensitive to changes in current or expected earnings. Value stocks carry the risk that investors will not recognize their intrinsic value for a long time or that they are actually appropriately priced at a low level.

Money market investments An underlying money market fund may not be able to maintain a stable $1.00 share price at all times. If a money market fund fails to maintain a stable net asset value, or if there is a perceived threat that a money market fund is likely to fail to maintain a stable net asset value, the underlying fund could experience significant redemption activity.

Performance

The following performance information provides some indication of the risks of investing in the fund. The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund.

SPECTRUM INTERNATIONAL FUND Calendar Year Returns

	Quarter Ended	Total Return		Quarter Ended	Total Return
Best Quarter	9/30/10	18.68%	Worst Quarter	9/30/11	-20.91%

The following table shows the average annual total returns for the fund, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund, if applicable.

In addition, the table shows hypothetical after-tax returns to demonstrate how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or an IRA.

Average Annual Total Returns Periods ended December 31, 2019

Average Annual Total Returns - Spectrum International Fund		1 Year	5 Years	10 Years	Inception date
Spectrum International Fund		25.00%	6.27%	6.39%	Dec. 31, 1996
Spectrum International Fund | Returns after taxes on distributions		24.11%	5.60%	5.91%	Dec. 31, 1996
Spectrum International Fund | Returns after taxes on distributions and sale of fund shares		15.64%	4.90%	5.17%	Dec. 31, 1996
MSCI All Country World Index ex USA Net (reflects no deduction for fees or expenses)	[1]	21.51%	5.51%	4.97%
MSCI All Country World Index ex USA (reflects no deduction for fees, expenses, or taxes)		22.13%	6.01%	5.45%
Combined Index Portfolio Net (reflects no deduction for fees or expenses)	[2]	21.51%	5.51%	4.97%
Lipper International Multi-Cap Growth Funds Average		26.59%	6.39%	6.13%

Updated performance information is available through troweprice.com.

[1] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.

[2] While the fund itself charges no management fee, it will indirectly bear its pro-rata share of the expenses of the underlying T. Rowe Price funds in which it invests (acquired funds). The acquired funds are expected to bear the operating expenses of the fund.

[1] While the fund itself charges no management fee, it will indirectly bear its pro-rata share of the expenses of the underlying T. Rowe Price funds in which it invests (acquired funds). The acquired funds are expected to bear the operating expenses of the fund.

[1] Effective June 1, 2019, the MSCI All Country World Index ex USA Net replaced the MSCI All Country World Index ex USA as the fund’s primary benchmark. The new index assumes the reinvestment of dividends after the deduction of withholding taxes applicable to the country where the dividend is paid; as such, the returns of the new benchmark are more representative of the returns experienced by investors in foreign issuers.

[2] Combined Index Portfolio Net is an unmanaged blended benchmark that was composed of 90% MSCI EAFE Index Net /10% J.P. Morgan Global Government Bond Index ex U.S. to 2/28/09 and the 100% MSCI All Country World Index ex USA Net from 3/1/09 forward.

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Document Type	dei_DocumentType	485BPOS
Document Period End Date	dei_DocumentPeriodEndDate	Dec. 31, 2019
Registrant Name	dei_EntityRegistrantName	T. Rowe Price Spectrum Fund, Inc.
Central Index Key	dei_EntityCentralIndexKey	0000808303
Amendment Flag	dei_AmendmentFlag	false
Document Creation Date	dei_DocumentCreationDate	Apr. 30, 2020
Document Effective Date	dei_DocumentEffectiveDate	May 01, 2020
Prospectus Date	rr_ProspectusDate	May 01, 2020
Entity Inv Company Type	dei_EntityInvCompanyType	N-1A

XML

Total

Spectrum Income Fund

T. ROWE PRICE Spectrum Income Fund SUMMARY

Investment Objective(s)

The fund seeks a high level of current income with moderate share price fluctuation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may also incur brokerage commissions and other charges when buying or selling shares of the fund, which are not reflected in the table.

Fees and Expenses of the Fund Shareholder fees (fees paid directly from your investment)

Shareholder Fees	Spectrum Income Fund Spectrum Income Fund USD ($)
Maximum account fee	$ 20	[1],[2]

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Spectrum Income Fund Spectrum Income Fund	[1]
Management fees
Distribution and service (12b-1) fees
Other expenses
Acquired fund fees and expenses	0.63%
Total annual fund operating expenses	0.63%

Example

This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods, that your investment has a 5% return each year, and that the fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example	1 year	3 years	5 years	10 years
Spectrum Income Fund | Spectrum Income Fund | USD ($)	64	202	351	786

Portfolio Turnover

The fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund’s performance. During the most recent fiscal year, the fund’s portfolio turnover rate was 24.1% of the average value of its portfolio.

Investments, Risks, and Performance Principal Investment Strategies

The fund broadly diversifies its assets among a set of T. Rowe Price mutual funds representing specific market segments. The fund, which normally invests in a variety of domestic and international bond funds, a money market fund, and an income-oriented stock fund, seeks to maintain broad exposure to several markets in an attempt to reduce the impact of markets that are declining and to benefit from good performance in particular market segments over time.

The fund can invest in funds holding high-quality domestic and foreign bonds, high-yield bonds (“junk” bonds), short- and long-term securities, dividend-paying stocks and other instruments (such as bank loans).

Within the ranges shown in the following table, the portfolio manager decides how much of the fund’s assets to allocate to underlying fund investments based on the outlook for, and on the relative valuations of, the underlying funds and the various markets in which they invest.

Asset Allocation Ranges for Underlying Funds

Spectrum Income Fund	Investment Range
Corporate Income	0%-10	%
Dynamic Global Bond	0%-10	%
Emerging Markets Bond	0%-20	%
Emerging Markets Local Currency Bond	0%-10	%
Equity Income	5%-25	%
Floating Rate	0%-15	%
GNMA	5%-20	%
High Yield	5%-25	%
Inflation Protected Bond	0%-10	%
International Bond	0%-15	%
International Bond (USD Hedged)	0%-20	%
Limited Duration Inflation Focused Bond	0%-10	%
New Income	10%-30	%
Short-Term Bond	0%-15	%
U.S. Treasury Intermediate	0%-10	%
U.S. Treasury Long-Term	0%-15	%
U.S. Treasury Money	0%-25	%
Ultra Short-Term Bond	0%-10	%

The fund may sell shares of the underlying funds for a variety of reasons, such as to secure gains, limit losses, or redeploy assets into more promising opportunities.

Principal Risks

As with any fund, there is no guarantee that the fund will achieve its objective(s). The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund, which may be even greater during periods of market disruption or volatility, are summarized as follows:

Market conditions The value of the fund’s investments may decrease, sometimes rapidly or unexpectedly, due to factors affecting an issuer held by the fund, particular industries, or the overall securities markets. A variety of factors can increase the volatility of the fund’s holdings and markets generally, including political or regulatory developments, recessions, inflation, rapid interest rate changes, war or acts of terrorism, natural disasters, and outbreaks of infectious illnesses or other widespread public health issues. Certain events may cause instability across global markets, including reduced liquidity and disruptions in trading markets, while some events may affect certain geographic regions, countries, sectors, and industries more significantly than others. These adverse developments may cause broad declines in market value due to short-term market movements or for significantly longer periods during more prolonged market downturns.

Asset allocation The fund’s overall level of risk will directly correspond to the risks of the underlying funds in which it invests. By investing in many underlying funds, the fund has partial exposure to the risks of different areas of the market. However, the selection of the underlying funds and the allocation of the fund’s assets among the various asset classes, market sectors, and investment styles represented by those underlying funds could cause the fund to underperform other funds with a similar benchmark or investment objective.

Investments in other funds The fund bears the risk that its underlying funds will fail to successfully employ their investment strategies. One or more underlying fund’s underperformance or failure to meet its investment objectives as intended could cause the fund to underperform similarly managed funds.

Bond exposure An underlying bond fund’s share price can fall because of various factors affecting bonds or due to general weakness in the overall bond markets. The fund invests in underlying funds with varying levels of credit risk, interest rate risk, and liquidity risk. At times, participants in bond markets may develop concerns about the ability of certain issuers to make timely principal and interest payments, or they may develop concerns about the ability of financial institutions that make markets in certain debt instruments to facilitate an orderly market. Those concerns could cause increased volatility and reduced liquidity in particular securities or in the overall bond markets and the related derivatives markets, which could hamper an underlying fund’s ability to sell the bonds in which it invests or to find and purchase suitable investments.

Interest rates The prices of, and the income generated by, bonds and other debt instruments held by an underlying fund may be affected by changes in interest rates. A rise in interest rates typically causes the price of a fixed rate debt instrument to fall and its yield to rise. Conversely, a decline in interest rates typically causes the price of a fixed rate debt instrument to rise and the yield to fall. Generally, underlying bond funds with longer weighted average maturities and durations carry greater interest rate risk.

Prepayments and extensions Underlying funds that invest in mortgage-backed securities, other asset-backed securities, or any debt instrument with an embedded call option are subject to prepayment risks because the principal on the security may be prepaid at any time, which could reduce the security’s yield and market value. The rate of prepayments tends to increase as interest rates fall, which could cause the average maturity of the underlying fund’s portfolio to shorten. Extension risk may result from a rise in interest rates, which tends to make mortgage-backed securities, asset-backed securities, and other callable debt instruments more volatile.

Junk investing Investments in bonds that are rated below investment grade, commonly referred to as junk bonds, and loans that are rated below investment grade, expose an underlying fund to greater volatility and credit risk than investments in securities that are rated investment-grade. Issuers of junk bonds and loans are usually not as strong financially and are more likely to suffer an adverse change in financial condition that would result in the inability to meet a financial obligation. As a result, bonds and loans rated below investment grade carry a higher risk of default and should be considered speculative.

Credit quality An issuer of a debt instrument held by an underlying fund could suffer an adverse change in financial condition that results in a payment default (failure to make scheduled interest or principal payments), rating downgrade, or inability to meet a financial obligation. The fund’s exposure to credit risk is increased to the extent the fund invests in underlying funds that hold securities that are not considered investment-grade. Holdings that are rated below investment grade carry greater risk of default and erratic price swings due, in part, to potentially adverse changes in the credit quality of the issuer.

International investing Investing in funds that hold the securities of non-U.S. issuers involves special risks not typically associated with investing in funds that hold securities of U.S. issuers. Non-U.S. securities tend to be more volatile and have lower overall liquidity than investments in U.S. securities and may lose value because of adverse local, political, social, or economic developments overseas, or due to changes in the exchange rates between foreign currencies and the U.S. dollar. In addition, investments outside the U.S. are subject to settlement practices and regulatory and financial reporting standards that differ from those of the U.S. The risks of investing outside the U.S. are heightened for any investments in emerging markets, which are susceptible to greater volatility than investments in developed markets.

Emerging markets Investing in funds that hold securities of issuers in emerging market countries involve greater risk and overall volatility than investing in funds that hold securities of issuers in the U.S. and developed markets. Emerging market countries tend to have economic structures that are less diverse and mature, and political systems that are less stable, than those of developed countries. In addition to the risks normally associated with investing outside the U.S., emerging markets are more susceptible to governmental interference, political and economic uncertainty, local taxes and restrictions on an underlying fund’s investments, less efficient trading markets with lower overall liquidity, and more volatile currency exchange rates.

Bank loans Underlying funds that invest in bank loans expose the fund to additional risks beyond those normally associated with more traditional debt instruments. An underlying fund’s ability to receive payments in connection with a loan depends primarily on the financial condition of the borrower and whether or not a loan is secured by collateral, although there is no assurance that the collateral securing a loan will be sufficient to satisfy the loan obligation. In addition, bank loans often have contractual restrictions on resale, which can delay the sale and adversely impact the sale price and have significantly longer settlement periods than more traditional investments. Bank loans often involve borrowers whose financial condition is troubled or highly leveraged, which increases an underlying fund’s risk that the fund may not receive its proceeds in a timely manner or that the fund may incur losses in order to pay redemption proceeds to its shareholders.

Dividend-paying stocks To the extent the fund invests in an underlying fund that focuses on dividend-paying stocks, it is exposed to greater volatility and the risk of stock market declines that could cause the fund to underperform funds with similar objectives. Stocks of established companies paying high dividends may not participate in a broad market advance to the same degree as most other stocks, and a sharp rise in interest rates could cause a company to reduce or eliminate its dividend.

Liquidity An underlying fund may not be able to meet requests to redeem shares without significant dilution of the remaining shareholders’ interest in the fund. A particular investment or an entire market segment may become less liquid or even illiquid, sometimes abruptly, which could limit a fund’s ability to purchase or sell holdings in a timely manner at a desired price. Reduced liquidity can result from a number of events, such as limited trading activity, reductions in bond inventory, and rapid or unexpected changes in interest rates. Large redemptions may also have a negative impact on an underlying fund’s overall liquidity.

Money market investments An underlying money market fund may not be able to maintain a stable $1.00 share price at all times. If a money market fund fails to maintain a stable net asset value, or if there is a perceived threat that a money market fund is likely to fail to maintain a stable net asset value, the underlying fund could experience significant redemption activity.

Performance

The following performance information provides some indication of the risks of investing in the fund. The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund.

SPECTRUM INCOME FUND Calendar Year Returns

	Quarter Ended	Total Return		Quarter Ended	Total Return
Best Quarter	9/30/10	5.64%	Worst Quarter	9/30/11	-3.56%

The following table shows the average annual total returns for the fund, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund, if applicable.

In addition, the table shows hypothetical after-tax returns to demonstrate how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or an IRA.

Average Annual Total Returns Periods ended December 31, 2019

Average Annual Total Returns - Spectrum Income Fund	1 Year	5 Years	10 Years	Inception date
Spectrum Income Fund	11.55%	4.26%	5.19%	Jun. 29, 1990
Spectrum Income Fund | Returns after taxes on distributions	9.97%	2.68%	3.58%	Jun. 29, 1990
Spectrum Income Fund | Returns after taxes on distributions and sale of fund shares	6.96%	2.66%	3.44%	Jun. 29, 1990
Bloomberg Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes)	8.72%	3.05%	3.75%
Lipper Multi-Sector Income Funds Average	9.77%	3.91%	5.18%

Updated performance information is available through troweprice.com.

[1] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.

[2] While the fund itself charges no management fee, it will indirectly bear its pro-rata share of the expenses of the underlying T. Rowe Price funds in which it invests (acquired funds). The acquired funds are expected to bear the operating expenses of the fund.

[1] While the fund itself charges no management fee, it will indirectly bear its pro-rata share of the expenses of the underlying T. Rowe Price funds in which it invests (acquired funds). The acquired funds are expected to bear the operating expenses of the fund.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

T. Rowe Price Spectrum Fund, Inc.

Prospectus Date

rr_ProspectusDate

May 01, 2020

Spectrum Growth Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

T. ROWE PRICE Spectrum Growth Fund SUMMARY

Objective [Heading]

rr_ObjectiveHeading

Investment Objective(s)

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks long-term capital appreciation

Objective, Secondary [Text Block]

rr_ObjectiveSecondaryTextBlock

and growth of income with current income a secondary objective.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may also incur brokerage commissions and other charges when buying or selling shares of the fund, which are not reflected in the table.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Fees and Expenses of the Fund Shareholder fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund’s performance. During the most recent fiscal year, the fund’s portfolio turnover rate was 19.3% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

19.30%

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods, that your investment has a 5% return each year, and that the fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Investments, Risks, and Performance Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The fund broadly diversifies its assets among a set of T. Rowe Price mutual funds representing specific market segments. The fund, which normally invests in a variety of domestic and international equity funds and, from time to time, a money market fund, seeks to maintain broad exposure to several markets in an attempt to reduce the impact of markets that are declining and to benefit from good performance in particular market segments over time.

The fund can invest in funds holding U.S. and international stocks; stocks of companies involved in activities related to commodities and other real assets; small-cap, mid-cap, and large-cap stocks; and growth and value stocks.

Within the ranges shown in the following table, the portfolio manager decides how much of the fund’s assets to allocate to underlying fund investments based on the outlook for, and on the relative valuations of, the underlying funds and the various markets in which they invest.

Asset Allocation Ranges for Underlying Funds

Spectrum Growth Fund	Investment Range
Blue Chip Growth	5%-25	%
Dividend Growth	0%-25	%
Emerging Markets Stock	0%-10	%
Equity Income	5%-25	%
Growth & Income	0%-25	%
Growth Stock	5%-25	%
International Discovery	0%-10	%
International Stock	0%-20	%
International Value Equity	0%-20	%
Mid-Cap Growth	0%-15	%
Mid-Cap Value	0%-15	%
New Horizons	0%-15	%
Real Assets	0%-10	%
Small-Cap Value	0%-15	%
U.S. Treasury Money	0%-25	%
Value	5%-25	%

The fund may sell shares of the underlying funds for a variety of reasons, such as to secure gains, limit losses, or redeploy assets into more promising opportunities.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

As with any fund, there is no guarantee that the fund will achieve its objective(s). The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund, which may be even greater during periods of market disruption or volatility, are summarized as follows:

Market conditions The value of the fund’s investments may decrease, sometimes rapidly or unexpectedly, due to factors affecting an issuer held by the fund, particular industries, or the overall securities markets. A variety of factors can increase the volatility of the fund’s holdings and markets generally, including political or regulatory developments, recessions, inflation, rapid interest rate changes, war or acts of terrorism, natural disasters, and outbreaks of infectious illnesses or other widespread public health issues. Certain events may cause instability across global markets, including reduced liquidity and disruptions in trading markets, while some events may affect certain geographic regions, countries, sectors, and industries more significantly than others. These adverse developments may cause broad declines in market value due to short-term market movements or for significantly longer periods during more prolonged market downturns.

Asset allocation The fund’s overall level of risk will directly correspond to the risks of the underlying funds in which it invests. By investing in many underlying funds, the fund has partial exposure to the risks of different areas of the market. However, the selection of the underlying funds and the allocation of the fund’s assets among the various asset classes, market sectors, and investment styles represented by those underlying funds could cause the fund to underperform other funds with a similar benchmark or investment objective.

Investments in other funds The fund bears the risk that its underlying funds will fail to successfully employ their investment strategies. One or more underlying fund’s underperformance or failure to meet its investment objectives as intended could cause the fund to underperform similarly managed funds.

Stock exposure An underlying stock fund’s share price can fall because of weakness in the overall stock markets, a particular industry, or specific holdings. Stocks generally fluctuate in value more than bonds and may decline significantly over short time periods. There is a chance that stock prices overall will decline because stock markets tend to move in cycles, with periods of rising and falling prices. The value of an underlying stock fund may decline due to general weakness or volatility in the stock markets, adverse conditions impacting a particular industry or market sector, or factors affecting an investment style or market capitalization targeted by the fund.

International investing Investing in funds that hold the securities of non-U.S. issuers involves special risks not typically associated with investing in funds that hold securities of U.S. issuers. Non-U.S. securities tend to be more volatile and have lower overall liquidity than investments in U.S. securities and may lose value because of adverse local, political, social, or economic developments overseas, or due to changes in the exchange rates between foreign currencies and the U.S. dollar. In addition, investments outside the U.S. are subject to settlement practices and regulatory and financial reporting standards that differ from those of the U.S. The risks of investing outside the U.S. are heightened for any investments in emerging markets, which are susceptible to greater volatility than investments in developed markets.

Emerging markets Investing in funds that hold securities of issuers in emerging market countries involve greater risk and overall volatility than investing in funds that hold securities of issuers in the U.S. and developed markets. Emerging market countries tend to have economic structures that are less diverse and mature, and political systems that are less stable, than those of developed countries. In addition to the risks normally associated with investing outside the U.S., emerging markets are more susceptible to governmental interference, political and economic uncertainty, local taxes and restrictions on an underlying fund’s investments, less efficient trading markets with lower overall liquidity, and more volatile currency exchange rates.

Market capitalization Because the fund invests in certain funds that focus on a particular market capitalization, its share price may be negatively affected if investing in that market capitalization falls out of favor. Small- and mid-cap companies often have less experienced management, more limited financial resources, and less publicly available information than larger companies, and tend to be more sensitive to changes in overall economic conditions. As a result, investments in small-cap and mid-cap companies are likely to be more volatile than investments in larger companies. However, larger companies may not be able to attain the high growth rates of successful smaller companies, especially during strong economic periods, and they may be less capable of responding quickly to competitive challenges and industry changes.

Investment style Because the fund invests in certain funds that focus on growth stocks and certain funds that focus on value stocks, its share price may be negatively affected if either investing approach falls out of favor. Growth stocks tend to be more volatile than the overall stock market and are more sensitive to changes in current or expected earnings. Value stocks carry the risk that investors will not recognize their intrinsic value for a long time or that they are actually appropriately priced at a low level.

Dividend-paying stocks To the extent the fund invests in an underlying fund that focuses on dividend-paying stocks, it is exposed to greater volatility and the risk of stock market declines that could cause the fund to underperform funds with similar objectives. Stocks of established companies paying high dividends may not participate in a broad market advance to the same degree as most other stocks, and a sharp rise in interest rates could cause a company to reduce or eliminate its dividend.

Money market investments An underlying money market fund may not be able to maintain a stable $1.00 share price at all times. If a money market fund fails to maintain a stable net asset value, or if there is a perceived threat that a money market fund is likely to fail to maintain a stable net asset value, the underlying fund could experience significant redemption activity.

Risk Lose Money [Text]

rr_RiskLoseMoney

The fund’s share price fluctuates, which means you could lose money by investing in the fund.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following performance information provides some indication of the risks of investing in the fund. The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following performance information provides some indication of the risks of investing in the fund. The following bar chart illustrates how much returns can differ from year to year by showing calendar year returns and the best and worst calendar quarter returns during those years for the fund. The following table shows the average annual total returns for the fund, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund, if applicable.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

troweprice.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The fund’s performance information represents only past performance (before and after taxes) and is not necessarily an indication of future results.

Bar Chart [Heading]

rr_BarChartHeading

SPECTRUM GROWTH FUND Calendar Year Returns

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

	Quarter Ended	Total Return		Quarter Ended	Total Return
Best Quarter	3/31/12	14.29%	Worst Quarter	9/30/11	-16.95%

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns Periods ended December 31, 2019

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or an IRA.

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

The following table shows the average annual total returns for the fund, and also compares the returns with the returns of a relevant broad-based market index, as well as with the returns of one or more comparative indexes that have investment characteristics similar to those of the fund, if applicable.

In addition, the table shows hypothetical after-tax returns to demonstrate how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or an IRA.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

Updated performance information is available through troweprice.com.

Spectrum Growth Fund | Spectrum Growth Fund

Risk/Return:

rr_RiskReturnAbstract

Maximum account fee

rr_MaximumAccountFee

$ 20

^[1],[2]

Management fees

rr_ManagementFeesOverAssets

^[2]

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

^[2]

Other expenses

rr_OtherExpensesOverAssets

^[2]

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.76%

^[2]

Total annual fund operating expenses

rr_ExpensesOverAssets

0.76%

^[2]

1 year

rr_ExpenseExampleYear01

$ 78

3 years

rr_ExpenseExampleYear03

243

5 years

rr_ExpenseExampleYear05

422

10 years

rr_ExpenseExampleYear10

$ 942

2010

rr_AnnualReturn2010

16.88%

2011

rr_AnnualReturn2011

(3.60%)

2012

rr_AnnualReturn2012

18.13%

2013

rr_AnnualReturn2013

28.59%

2014

rr_AnnualReturn2014

5.60%

2015

rr_AnnualReturn2015

0.75%

2016

rr_AnnualReturn2016

7.84%

2017

rr_AnnualReturn2017

25.52%

2018

rr_AnnualReturn2018

(8.53%)

2019

rr_AnnualReturn2019

27.03%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Mar. 31, 2012

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

14.29%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(16.95%)

1 Year

rr_AverageAnnualReturnYear01

27.03%

5 Years

rr_AverageAnnualReturnYear05

9.64%

10 Years

rr_AverageAnnualReturnYear10

11.09%

Inception date

rr_AverageAnnualReturnInceptionDate

Jun. 29, 1990

Spectrum Growth Fund | Returns after taxes on distributions | Spectrum Growth Fund

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

24.46%

5 Years

rr_AverageAnnualReturnYear05

7.30%

10 Years

rr_AverageAnnualReturnYear10

9.52%

Inception date

rr_AverageAnnualReturnInceptionDate

Jun. 29, 1990

Spectrum Growth Fund | Returns after taxes on distributions and sale of fund shares | Spectrum Growth Fund

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

17.73%

5 Years

rr_AverageAnnualReturnYear05

7.21%

10 Years

rr_AverageAnnualReturnYear10

8.89%

Inception date

rr_AverageAnnualReturnInceptionDate

Jun. 29, 1990

Spectrum Growth Fund | Russell 3000® Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

31.02%

5 Years

rr_AverageAnnualReturnYear05

11.24%

10 Years

rr_AverageAnnualReturnYear10

13.42%

Spectrum Growth Fund | Combined Index Portfolio Net (reflects no deduction for fees or expenses)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

28.16%

^[3]

5 Years

rr_AverageAnnualReturnYear05

9.61%

^[3]

10 Years

rr_AverageAnnualReturnYear10

11.08%

^[3]

Spectrum Growth Fund | S&P 500 Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

31.49%

5 Years

rr_AverageAnnualReturnYear05

11.70%

10 Years

rr_AverageAnnualReturnYear10

13.56%

Spectrum Growth Fund | Lipper Multi-Cap Core Funds Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

29.31%

5 Years

rr_AverageAnnualReturnYear05

9.73%

10 Years

rr_AverageAnnualReturnYear10

11.82%

[1] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.

[2] While the fund itself charges no management fee, it will indirectly bear its pro-rata share of the expenses of the underlying T. Rowe Price funds in which it invests (acquired funds). The acquired funds are expected to bear the operating expenses of the fund.

[3] Combined Index Portfolio Net is an unmanaged blended benchmark that from 9/1/08 through 4/30/11, was composed of 80% the Russell 3000® Index and 20% the MSCI All Country World ex USA Index Net. From 5/1/11 through 7/31/12, the blended benchmark was composed of the Russell 3000® Index (ranging from 79%-71.01%) and the MSCI All Country World ex USA Index Net (ranging from 21%-28.99%). From 8/1/12 through 3/10/15, the blended benchmark was composed of 70% the Russell 3000® Index and 30% the MSCI All Country World ex USA Index Net. Since 3/11/15, the blended benchmark has been composed of 70% the Russell 3000® Index and 30% the MSCI All Country World Index ex USA Investable Market Index Net. The indices and percentages may vary over time.