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T. Rowe Price Balanced Fund, Inc.  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Balanced Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective(s)
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The fund seeks to provide capital growth, current income, and preservation of capital through a portfolio of stocks and fixed income securities.
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 or example below.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption 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 91.9% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 91.90%
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. The example also assumes that any current expense limitation arrangement remains in place for the period noted in the previous table; therefore, the figures have been adjusted to reflect fee waivers or expense reimbursements only in the periods for which the expense limitation arrangement is expected to continue. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The fund normally invests approximately 65% of its net assets in stocks and 35% of its net assets in fixed income securities, although the amount may vary based on market conditions. The fund invests at least 25% of its net assets in fixed income senior securities and may invest up to 35% of its net assets in foreign securities.

When deciding upon overall allocations between stocks and fixed income securities, the adviser may favor stocks when strong economic growth is expected and may favor fixed income securities if the economy is expected to slow sufficiently to hurt corporate profit growth. The fund invests in bonds, including foreign issues, which are primarily rated investment grade (i.e., assigned one of the four highest credit ratings by credit rating agencies or by T. Rowe Price) and are chosen from across the entire government, corporate, and asset- and mortgage-backed securities markets. Maturities generally reflect the adviser’s outlook for interest rates.

When selecting particular stocks, the adviser examines relative values and prospects among growth- and value-oriented stocks, domestic and international stocks, small- to large-cap stocks, and stocks of companies involved in activities related to commodities and other real assets. Domestic stocks are drawn from the overall U.S. market and international stocks are selected primarily from large companies in developed countries, although stocks in emerging markets may also be purchased. This process draws heavily upon the adviser’s proprietary stock research expertise. While the fund maintains a well-diversified portfolio, its portfolio manager may at a particular time shift stock selection toward markets or market sectors that appear to offer attractive value and appreciation potential.

A similar security selection process applies to bonds. When deciding whether to adjust duration, credit risk exposure, or allocations among the various sectors (for example, high yield “junk” bonds, mortgage- and asset-backed securities, international bonds, and emerging markets bonds), the adviser weighs such factors as the outlook for inflation and the economy, corporate earnings, expected interest rate movements and currency valuations, and the yield advantage that lower-rated bonds may offer over investment-grade bonds.
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 in bad or uncertain market conditions, are summarized as follows:

Stock investing 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 stocks held by the fund may decline due to general weakness or volatility in the stock markets in which the fund invests or because of factors that affect a particular company or industry.

Fixed income markets Economic and other market developments can adversely affect the fixed income securities markets. At times, participants in these markets may develop concerns about the ability of certain issuers of debt instruments 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 fixed income markets and the related derivatives markets. A lack of liquidity or other adverse credit market conditions may hamper the fund’s ability to sell the debt instruments in which it invests or to find and purchase suitable debt instruments.

Interest rates The prices of, and the income generated by, debt instruments held by the 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, funds with longer weighted average maturities and durations carry greater interest rate risk. Changes in monetary policy made by central banks and/or governments, such as the discontinuation and replacement of benchmark rates, are likely to affect the level of interest rates.

Prepayments and extensions The fund is subject to prepayment risks because the principal on mortgage-backed securities, other asset-backed securities, or any debt instrument with an embedded call option 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 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.

Credit quality An issuer of a debt instrument 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. Securities that are rated below investment grade carry greater risk of default and should be considered speculative.

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, military conflict, or acts of terrorism, natural disasters, and outbreaks of infectious illnesses or other widespread public health issues such as the coronavirus pandemic and related governmental and public responses (including sanctions). 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. Government intervention in markets may impact interest rates, market volatility, and security pricing. 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.

International investing Investing in the securities of non-U.S. issuers involves special risks not typically associated with investing in 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 Investments in emerging market countries are subject to greater risk and overall volatility than investments in the U.S. and other developed markets. Emerging market countries tend to have economic structures that are less diverse and mature, less developed legal and regulatory regimes, and political systems that are less stable, than those of developed countries. In addition to the risks associated with investing outside the U.S., emerging markets are more susceptible to governmental interference, political and economic uncertainty, local taxes and restrictions on the fund’s investments, less efficient trading markets with lower overall liquidity, and more volatile currency exchange rates.

Liquidity The fund may not be able to meet requests to redeem shares issued by the fund without significant dilution of the remaining shareholders’ interests in the fund. In addition, the fund may not be able to sell a holding in a timely manner at a desired price. Reduced liquidity in the bond markets can result from a number of events, such as limited trading activity, reductions in bond inventory, and rapid or unexpected changes in interest rates. Markets with lower overall liquidity could lead to greater price volatility and limit the fund’s ability to sell a holding at a suitable price.

 

Active management The fund’s overall investment program and holdings selected by the fund’s investment adviser may underperform the broad markets, relevant indices, or other funds with similar objectives and investment strategies.

Cybersecurity breaches The fund could be harmed by intentional cyberattacks and other cybersecurity breaches, including unauthorized access to the fund’s assets, customer data and confidential shareholder information, or other proprietary information. In addition, a cybersecurity breach could cause one of the fund’s service providers or financial intermediaries to suffer unauthorized data access, data corruption, or loss of operational functionality.
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’s Investor Class. Returns for other share classes vary since they have different expenses.
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’s Investor Class. Returns for other share classes vary since they have different expenses. The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, 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 Calendar Year Returns
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
         
  

Quarter Ended

Total Return

  

Quarter Ended

Total Return

 
 

Best Quarter

6/30/20

14.99%

 

Worst Quarter

3/31/20

-14.51%

 
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns Periods ended December 31, 2021
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 One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown only for the Investor Class and will differ for other share classes.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock

The following table shows the average annual total returns for each class of the fund that has been in operation for at least one full calendar year, 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. After-tax returns are shown only for the Investor Class and will differ for other share classes.
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

Updated performance information is available through troweprice.com.
T. Rowe Price Balanced Fund, Inc. | Morningstar Moderate Target Risk Index  
Risk/Return: rr_RiskReturnAbstract  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes reflects no deduction for fees, expenses, or taxes
Label rr_AverageAnnualReturnLabel Morningstar Moderate Target Risk Index (reflects no deduction for fees, expenses, or taxes)
T. Rowe Price Balanced Fund, Inc. | Morningstar Moderate Target Risk Index  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 10.19%
5 Years rr_AverageAnnualReturnYear05 10.07%
10 Years rr_AverageAnnualReturnYear10 8.75%
Since Inception rr_AverageAnnualReturnSinceInception 9.82% [1]
T. Rowe Price Balanced Fund, Inc. | Combined Index Portfolio  
Risk/Return: rr_RiskReturnAbstract  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes reflects no deduction for fees, expenses, or taxes [2]
Label rr_AverageAnnualReturnLabel Combined Index Portfolio (reflects no deduction for fees, expenses, or taxes) [2]
T. Rowe Price Balanced Fund, Inc. | Combined Index Portfolio  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 14.13%
5 Years rr_AverageAnnualReturnYear05 11.66%
10 Years rr_AverageAnnualReturnYear10 10.22%
Since Inception rr_AverageAnnualReturnSinceInception 10.78% [1]
T. Rowe Price Balanced Fund, Inc. | Lipper Balanced Funds Index  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Lipper Balanced Funds Index
T. Rowe Price Balanced Fund, Inc. | Lipper Balanced Funds Index  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 13.18%
5 Years rr_AverageAnnualReturnYear05 10.80%
10 Years rr_AverageAnnualReturnYear10 9.55%
Since Inception rr_AverageAnnualReturnSinceInception 10.14% [1]
T. Rowe Price Balanced Fund, Inc. | Investor Class  
Risk/Return: rr_RiskReturnAbstract  
Maximum account fee rr_MaximumAccountFee $ 20 [3]
Management fees rr_ManagementFeesOverAssets 0.43%
Other expenses rr_OtherExpensesOverAssets 0.14%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.04%
Total annual fund operating expenses rr_ExpensesOverAssets 0.61% [4]
Fee waiver/expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.04%) [5]
Total annual fund operating expenses afterfee waiver/expense reimbursement rr_NetExpensesOverAssets 0.57% [4]
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees The figures shown in the fee table do not match the “Ratios to average net assets” shown in the Financial Highlights table, as those figures do not include acquired fund fees and expenses and exclude expenses permanently waived as a result of investments in other T. Rowe Price Funds.
1 Year rr_ExpenseExampleYear01 $ 58
3 Years rr_ExpenseExampleYear03 183
5 Years rr_ExpenseExampleYear05 318
10 Years rr_ExpenseExampleYear10 $ 714
Annual Return 2012 rr_AnnualReturn2012 13.95%
Annual Return 2013 rr_AnnualReturn2013 19.25%
Annual Return 2014 rr_AnnualReturn2014 5.97%
Annual Return 2015 rr_AnnualReturn2015 0.65%
Annual Return 2016 rr_AnnualReturn2016 5.92%
Annual Return 2017 rr_AnnualReturn2017 18.01%
Annual Return 2018 rr_AnnualReturn2018 (4.92%)
Annual Return 2019 rr_AnnualReturn2019 20.74%
Annual Return 2020 rr_AnnualReturn2020 14.57%
Annual Return 2021 rr_AnnualReturn2021 13.36%
Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2020
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 14.99%
Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (14.51%)
1 Year rr_AverageAnnualReturnYear01 13.36%
5 Years rr_AverageAnnualReturnYear05 11.96%
10 Years rr_AverageAnnualReturnYear10 10.45%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 31, 1939
T. Rowe Price Balanced Fund, Inc. | Investor Class | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 10.69%
5 Years rr_AverageAnnualReturnYear05 10.12%
10 Years rr_AverageAnnualReturnYear10 8.75%
T. Rowe Price Balanced Fund, Inc. | Investor Class | After Taxes on Distributions and Sales  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 9.22%
5 Years rr_AverageAnnualReturnYear05 9.06%
10 Years rr_AverageAnnualReturnYear10 8.03%
T. Rowe Price Balanced Fund, Inc. | I Class  
Risk/Return: rr_RiskReturnAbstract  
Maximum account fee rr_MaximumAccountFee none
Management fees rr_ManagementFeesOverAssets 0.43%
Other expenses rr_OtherExpensesOverAssets 0.02%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.04%
Total annual fund operating expenses rr_ExpensesOverAssets 0.49% [4]
Fee waiver/expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.04%) [5]
Total annual fund operating expenses afterfee waiver/expense reimbursement rr_NetExpensesOverAssets 0.45% [4]
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees The figures shown in the fee table do not match the “Ratios to average net assets” shown in the Financial Highlights table, as those figures do not include acquired fund fees and expenses and exclude expenses permanently waived as a result of investments in other T. Rowe Price Funds.
1 Year rr_ExpenseExampleYear01 $ 46
3 Years rr_ExpenseExampleYear03 144
5 Years rr_ExpenseExampleYear05 252
10 Years rr_ExpenseExampleYear10 $ 567
1 Year rr_AverageAnnualReturnYear01 13.51%
5 Years rr_AverageAnnualReturnYear05 12.10%
Since Inception rr_AverageAnnualReturnSinceInception 11.04%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 17, 2015
[1] Return since 12/17/15.
[2] Combined Index Portfolio is an unmanaged blended benchmark that from 5/1/11 through 7/31/12, was composed of 51.35%-46.14% domestic stocks (S&P 500 Index), 35% bonds (Bloomberg U.S. Aggregate Index), and 13.65%-18.86% international stocks (MSCI EAFE Index Net). Since 8/1/12, the blended benchmark has been composed of 45.5% domestic stocks (S&P 500 Index), 35% bonds (Bloomberg U.S. Aggregate Index), and 19.5% international stocks (MSCI EAFE Index Net). The indices and percentages may vary over time.
[3]

Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.
[4]

The figures shown in the fee table do not match the “Ratios to average net assets” shown in the Financial Highlights table, as those figures do not include acquired fund fees and expenses and exclude expenses permanently waived as a result of investments in other T. Rowe Price Funds.
[5]

T. Rowe Price Associates, Inc., is required to permanently waive a portion of its management fee charged to the fund in an amount sufficient to fully offset that portion of management fee paid by each underlying T. Rowe Price Fund related to the fund’s investment therein. The amount of the waiver will vary each fiscal year in proportion to the amount invested in other T. Rowe Price Funds.