2.2.0.25truefalse000101 - Document - Risk/Return Summary {Unlabeled} - (T. Rowe Price Balanced Fund, Inc.)falsefalsetrue1falsefalsetruefalse{dei_LegalEntityAxis} : S000002068 Member 5/1/2011 - 5/1/2011 Duration_5_1_2011_To_5_1_2011_dei_LegalEntityAxis_cik000871839_S000002068Memberhttp://www.sec.gov/CIK0000871839duration2011-05-01T00:00:002011-05-01T00:00:00falsefalsecik000871839_S000002068Memberdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik000871839_S000002068Memberdei_LegalEntityAxisexplicitMemberUnit1Standardhttp://www.xbrl.org/2003/instancepurexbrli03false0rr_RiskReturnHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div class="MetaData" align="left"><font style="font-family: Trade Gothic LT Std; font-size: 24pt;" class="_mt" color="#004f7c">Balanced Fund<br /></font><b><font style="font-size: 14pt; font-family: Trajan Pro;" lang="EN-US" color="#004f7c" class="_mt">SUMMARY</font></b></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Investment Objectives/Goals Include the following information, in plain English under rule 421(d) under the Securities Act, in the order and subject matter indicatedReference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 falsefalseRisk/Return [Heading]4false0rr_ObjectiveHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div class="MetaData"> <p style="margin: 0in 0in 2pt;"><font style="font-family: MetaBoldLF-Roman; font-size: 9.5pt;" lang="EN-US" class="_mt" color="#004f7c">Investment Objective</font></p></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalseObjective [Heading]5false0rr_ObjectivePrimaryTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> <div class="MetaData"> <p style="margin: 0in 0in 6pt;"><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">The fund seeks to provide capital growth, current income, and preservation of capital through a portfolio of stocks and fixed income securities.</font></p></div> </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalseObjective, Primary [Text Block]6false0rr_ExpenseHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div class="MetaData"> <p style="margin: 0in 0in 2pt;"><font style="font-family: MetaBoldLF-Roman; font-size: 9.5pt;" lang="EN-US" class="_mt" color="#004f7c">Fees and Expenses</font></p></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Fee Table Includes the following information, in plain English under rule 421(d) under the Securities Act, after Item 2 Fees and expenses of the Fund This table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Shareholder Fees (fees paid directly from your investment) 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 you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be You would pay the following expenses if you did not redeem your shares The Example does not reflect sales charges (loads) on reinvested dividends [and other distributions]. If these sales charges (loads) were included, your costs would be higher. 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 may indicate higher transaction costs. 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 __% of the average value of its whole portfolio. Instructions. A.3.instructions.6 New Funds. For purposes of this Item, a "New Fund" is a Fund that does not include in Form N-1A financial statements reporting operating results or that includes financial statements for the Fund's initial fiscal year reporting operating results for a period of 6 months or less. The following Instructions apply to New Funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph d -Subsection instructions falsefalseExpense [Heading]7false0rr_ExpenseNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> <div class="MetaData"> <p style="margin: 0in 0in 2pt;"><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">This table describes the fees and expenses that you may pay if you buy and hold shares of the fund. </font></p></div> </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Include the narrative explanations in the order indicated. A Fund may modify the narrative explanations if the explanation contains comparable information to that shown.The narrative explanation regarding sales charge discounts is only required by a Fund that offers such discounts and should specify the minimum level of investment required to qualify for a discount. Modify the narrative explanation to state that Fund shares are sold on a national securities exchange at the end of the time periods indicated, and that brokerage commissions for buying and selling Fund shares through a broker are not reflected.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalseExpense Narrative [Text Block]8false0rr_ShareholderFeesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div class="MetaData"> <div> <p style="margin: 0in 0in 1pt;"><font style="font-family: MetaBoldLF-Italic; font-size: 8pt;" lang="EN-US" class="_mt" color="#004f7c">Fees and Expenses of the Fund<font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font></font></p> <p style="text-align: center; margin: 2pt 0in;"><font style="font-family: MetaBoldLF-Italic; font-size: 8pt;" class="_mt" color="#004f7c"><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>Shareholder fees (fees paid directly from your investment)</font></p></div></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringShareholder Fees (fees paid directly from your investment).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subsection table falsefalseShareholder Fees Caption [Text]9false0rr_ShareholderFeesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> &lt;div style="display:none;" &gt;~ http://troweprice.com/role/ScheduleShareholderFeesTRowePriceBalancedFundInc column period compact * column dei_LegalEntityAxis compact cik000871839_S000002068Member column rr_ProspectusShareClassAxis compact * row primary compact * ~&lt;/div&gt; </div>falsefalse<div> &lt;div style="display:none;" &gt;~ http://troweprice.com/role/ScheduleShareholderFeesTRowePriceBalancedFundInc column period compact * column dei_LegalEntityAxis compact cik000871839_S000002068Member column rr_ProspectusShareClassAxis compact * row primary compact * ~&lt;/div&gt; </div>falsehttp://troweprice.com/role/ScheduleShareholderFeesTRowePriceBalancedFundIncfalsefalse000102 - Schedule - Shareholder Fees - {T. Rowe Price Balanced Fund, Inc.}truefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik000871839_S000002068MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-05-01T00:00:002011-05-01T00:00:00falsefalseT. Rowe Price Balanced Fund, Inc.dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik000871839_S000002068Memberdei_LegalEntityAxisexplicitMemberfalsefalseT. Rowe Price Balanced Fund, Inc.rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik000871839_C000005423Memberrr_ProspectusShareClassAxisexplicitMemberT. Rowe Price Balanced Fund, Inc.T. Rowe Price Balanced Fund, Inc.Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*5false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruetrue00falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalseMaximum sales charge (load) imposed on purchases0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue00falsefalsefalsetruefalseOthernanafalsefalseMaximum sales charge (load) imposed on purchases2falseRowprimaryElement*6false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruetrue00falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalseMaximum deferred sales charge (load)0rr_MaximumDeferredSalesChargeOverOfferingPricetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue00falsefalsefalsetruefalseOthernanafalsefalseMaximum deferred sales charge (load)3falseRowprimaryElement*7false0rr_RedemptionFeerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue00falsefalsefalsetruefalseMonetaryrr:NonPositiveMonetaryTypemonetary"Redemption Fee" (as a percentage of amount redeemed, if applicable) If the Fund is an Exchange-Traded Fund and issues or redeems shares in creation units of not less than 25,000 shares each, exclude any fees charged for the purchase and redemption of the Fund's creation units. "Redemption Fee" includes a fee charged for any redemption of the Fund's shares, but does not include a deferred sales charge (load) imposed upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 4 -Subsection table falsefalseRedemption fee0rr_RedemptionFeetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue00falsefalsefalsetruefalseOthernanafalsefalseRedemption fee4falseRowprimaryElement*8false0rr_MaximumAccountFeerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue1010[1]falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryInclude the caption "Maximum Account Fees" only if the Fund charges these fees. A Fund may omit other captions if the Fund does not charge the fees or expenses covered by the captions. Disclose account fees that may be charged to a typical investor in the Fund; fees that apply to only a limited number of shareholders based on their particular circumstances need not be disclosed. Include a caption describing the maximum account fee (e.g., "Maximum Account Maintenance Fee" or "Maximum Cash Management Fee"). State the maximum annual account fee as either a fixed dollar amount or a percentage of assets. Include in a parenthetical to the caption the basis on which any percentage is calculated. If an account fee is charged only to accounts that do not meet a certain threshold (e.g., accounts under $5)Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph c -Subsection instructions falsefalseMaximum account fee0rr_MaximumAccountFeetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[1]1truefalsetrue1010falsefalsefalsetruefalseOthernanafalsefalseMaximum account fee1 Nonretirement accounts with less than a $2,000 balance (with certain exceptions) may be subject to an annual $10 fee.14Shareholder Fees - (USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik000871839_S000002068MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ShareholderFeesData.No authoritative reference available.falsefalseShareholder Fees [Table]10false0rr_OperatingExpensesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div class="MetaData"> <p style="text-align: center; margin: 2pt 0in;"><font style="font-family: MetaBoldLF-Italic; font-size: 8pt;" class="_mt" color="#004f7c"><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>Annual fund operating expenses<br />(expenses that you pay each year as a<br />percentage of the value of your investment)<font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font></font></p></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringAnnual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 7 -Subsection table falsefalseOperating Expenses Caption [Text]11false0rr_AnnualFundOperatingExpensesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> &lt;div style="display:none;" &gt;~ http://troweprice.com/role/ScheduleAnnualFundOperatingExpensesTRowePriceBalancedFundInc2 column period compact * column dei_LegalEntityAxis compact cik000871839_S000002068Member column rr_ProspectusShareClassAxis compact * row primary compact * ~&lt;/div&gt; </div>falsefalse<div> &lt;div style="display:none;" &gt;~ http://troweprice.com/role/ScheduleAnnualFundOperatingExpensesTRowePriceBalancedFundInc2 column period compact * column dei_LegalEntityAxis compact cik000871839_S000002068Member column rr_ProspectusShareClassAxis compact * row primary compact * ~&lt;/div&gt; </div>falsehttp://troweprice.com/role/ScheduleAnnualFundOperatingExpensesTRowePriceBalancedFundInc2falsefalse000103 - Schedule - Annual Fund Operating Expenses - {T. Rowe Price Balanced Fund, Inc.}truefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik000871839_S000002068MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-05-01T00:00:002011-05-01T00:00:00falsefalseT. Rowe Price Balanced Fund, Inc.dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik000871839_S000002068Memberdei_LegalEntityAxisexplicitMemberfalsefalseT. Rowe Price Balanced Fund, Inc.rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik000871839_C000005423Memberrr_ProspectusShareClassAxisexplicitMemberT. Rowe Price Balanced Fund, Inc.T. Rowe Price Balanced Fund, Inc.Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*5false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruetrue0.00450.0045falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalseManagement fees0rr_ManagementFeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00450.0045falsefalsefalsetruefalseOthernanafalsefalseManagement fees2falseRowprimaryElement*6false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalseDistribution and service (12b-1) fees0rr_DistributionAndService12b1FeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalseDistribution and service (12b-1) fees3falseRowprimaryElement*7false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruetrue0.00210.0021falsefalsefalsetruefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions falsefalseOther expenses0rr_OtherExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00210.0021falsefalsefalsetruefalseOthernanafalsefalseOther expenses4falseRowprimaryElement*8false0rr_AcquiredFundFeesAndExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruetrue0.00020.0002falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalseAcquired fund fees and expenses0rr_AcquiredFundFeesAndExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00020.0002falsefalsefalsetruefalseOthernanafalsefalseAcquired fund fees and expenses5falseRowprimaryElement*9false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truetruetrue0.00680.0068falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions truefalseTotal annual fund operating expenses0rr_ExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00680.0068falsefalsefalsetruefalseOthernanafalsefalseTotal annual fund operating expenses6falseRowprimaryElement*10false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truetruetrue0.00020.0002[2]falsefalsefalsetruefalseOtherrr:NonPositivePure4TypepureTotal Annual Fund Operating Expenses. If there were expense reimbursement or fee waiver arrangements that reduced any Fund operating expenses and will continue to reduce them for no less than one year from the effective date of the Fund's registration statement, a Fund may add two captions to the table one caption showing the amount of the expense reimbursement or fee waiver, and a second caption showing the Fund's net expenses after subtracting the fee reimbursement or expense waiver from the total fund operating expenses. The Fund should place these additional captions directly below the "Total Annual Fund Operating Expenses" caption of the table and should use appropriate descriptive captions, such as "Fee Waiver [and/or Expense Reimbursement]" and "Total Annual Fund Operating Expenses After Fee Waiver [and/or Expense Reimbursement]," respectively. If the Fund provides this disclosure, also disclose the period for which the expense reimbursement or fee waiver arrangement is expected to continue, and briefly describe who can terminate the arrangement and under what circumstances.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalseFee waiver/expense reimbursement0rr_FeeWaiverOrReimbursementOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[1]1truetruetrue0.00020.0002falsefalsefalsetruefalseOthernanafalsefalseFee waiver/expense reimbursement7falseRowprimaryElement*11false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truetruetrue0.00660.0066[1]falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table truefalseTotal annual fund operating expenses after fee waiver/expense reimbursement0rr_NetExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[2]1truetruetrue0.00660.0066falsefalsefalsetruefalseOthernanafalsefalseTotal annual fund operating expenses after fee waiver/expense reimbursement1T. 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 any acquired fund fees and expenses related to investments in other T. Rowe Price mutual funds. The amount of the waiver will vary each fiscal year in proportion to the amount invested in other T. Rowe Price mutual funds. The T. Rowe Price funds would be required to seek regulatory approval in order to terminate this arrangement. 2 The figure shown under "Total annual fund operating expenses after fee waiver/reimbursement" does not match the "Ratio of expenses to average net assets" shown in the Financial Highlights table, as that figure does not include acquired fund fees and expenses. 17Annual Fund Operating Expenses - UnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik000871839_S000002068MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to OperatingExpensesData.No authoritative reference available.falsefalseAnnual Fund Operating Expenses [Table]12false0rr_ExpenseExampleHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div class="MetaData"> <p style="margin: 0in 0in 6pt;"><font style="line-height: 12pt; font-family: MetaMediumLF-Roman; font-size: 9.5pt;" lang="EN-US" class="_mt"><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>Example<font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt">&nbsp;</font></font><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>&nbsp;</font></p></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringHeading for Expense Example.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalseExpense Example [Heading]13false0rr_ExpenseExampleNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> <div class="MetaData"> <p style="margin: 0in 0in 6pt;"><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">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. The example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. </font><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">Although your actual costs may be higher or lower, based on these assumptions your costs would be:</font></p></div> </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThe Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection example falsefalseExpense Example Narrative [Text Block]14false0rr_ExpenseExampleWithRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> &lt;div style="display:none;" &gt;~ http://troweprice.com/role/ScheduleExpenseExampleTransposedTRowePriceBalancedFundInc row period compact * row primary compact * column dei_LegalEntityAxis compact cik000871839_S000002068Member column rr_ProspectusShareClassAxis compact * ~&lt;/div&gt; </div>falsefalse<div> &lt;div style="display:none;" &gt;~ http://troweprice.com/role/ScheduleExpenseExampleTransposedTRowePriceBalancedFundInc row period compact * row primary compact * column dei_LegalEntityAxis compact cik000871839_S000002068Member column rr_ProspectusShareClassAxis compact * ~&lt;/div&gt; </div>truehttp://troweprice.com/role/ScheduleExpenseExampleTransposedTRowePriceBalancedFundIncfalsefalse000104 - Schedule - Expense Example {Transposed} - {T. Rowe Price Balanced Fund, Inc.}truefalsefalse1falseColumnperiodPeriod*ColumnprimaryElement*5false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue6767falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse1 yearduration2011-05-01T00:00:002011-05-01T00:00:00falseUSDfalsefalse$2falseColumnperiodPeriod*ColumnprimaryElement*6false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue211211falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse3 yearsduration2011-05-01T00:00:002011-05-01T00:00:00falseUSDfalsefalse$3falseColumnperiodPeriod*ColumnprimaryElement*7false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue368368falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse5 yearsduration2011-05-01T00:00:002011-05-01T00:00:00falseUSDfalsefalse$4falseColumnperiodPeriod*ColumnprimaryElement*8false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue822822falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. 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Rowe Price Balanced Fund, Inc.41Expense Example - (USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*ColumnprimaryElement*Rowdei_LegalEntityAxisAxiscik000871839_S000002068MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ExpenseExample.No authoritative reference available.falsefalseExpense Example, With Redemption [Table]15false0rr_PortfolioTurnoverHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div class="MetaData"> <p style="margin: 0in 0in 6pt;"><font style="line-height: 12pt; font-family: MetaMediumLF-Roman; font-size: 9.5pt;" lang="EN-US" class="_mt">Portfolio </font><font style="font-family: MetaPlusLF-MediumRoman; vertical-align: baseline;" class="_mt" color="black"><font style="line-height: 12pt; font-family: MetaPlusLF-MediumRoman; letter-spacing: 0pt; font-size: 9.5pt; text-decoration: none;" lang="EN-US" class="_mt" color="black"><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font></font></font><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font></font><font style="line-height: 12pt; font-family: MetaMediumLF-Roman; font-size: 9.5pt;" lang="EN-US" class="_mt"><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>Turnover<font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt">&nbsp;</font></font><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>&nbsp;</font></p></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 5 -Subsection instructions falsefalsePortfolio Turnover [Heading]16false0rr_PortfolioTurnoverTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> <div class="MetaData"> <p style="margin: 0in 0in 6pt;"><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">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 fund 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&nbsp;<font class="_mt">44.5<font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>%</font> of the average value of its portfolio.</font></p></div> </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subsection example falsefalsePortfolio Turnover [Text Block]17false0rr_StrategyHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div class="MetaData"> <p style="margin: 0in 0in 2pt;"><font style="font-family: MetaBoldLF-Roman; font-size: 9.5pt;" lang="EN-US" class="_mt" color="#004f7c">Investments, Risks, and Performance</font></p> <p style="margin: 0in 0in 6pt;"><font style="line-height: 12pt; font-family: MetaMediumLF-Roman; font-size: 9.5pt;" lang="EN-US" class="_mt">Principal Investment </font><font style="font-family: MetaPlusLF-MediumRoman; vertical-align: baseline;" class="_mt" color="black"><font style="line-height: 12pt; font-family: MetaPlusLF-MediumRoman; letter-spacing: 0pt; font-size: 9.5pt; text-decoration: none;" lang="EN-US" class="_mt" color="black"><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font></font></font><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font></font><font style="line-height: 12pt; font-family: MetaMediumLF-Roman; font-size: 9.5pt;" lang="EN-US" class="_mt"><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>Strategies</font></p></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalseStrategy [Heading]18false0rr_StrategyNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> <div class="MetaData"> <div> <p style="margin: 0in 0in 2pt;"><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"><font class="_mt"><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">The fund normally invests approximately 65% of <font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>its <font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>total assets in U.S. and foreign common stocks and 35% in fixed income securities. </font></font>The fund will invest at least 25% of total assets in fixed income senior securities.</font></font></p> <div> <div> <p style="margin: 0in 0in 6pt;"><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">When deciding upon overall allocations between stocks and fixed income securities, the portfolio manager may favor fixed income securities if the economy is expected to slow sufficiently to hurt corporate profit growth. When strong economic growth is expected, the manager may favor stocks.</font></p> <p style="margin: 0in 0in 6pt;"><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">When selecting particular stocks, the manager will examine relative values and prospects among growth- and value-oriented stocks, domestic and international stocks, and small- to large-cap stocks. Domestic stocks are drawn from the overall U.S. market, while international equities are selected primarily from large companies in developed countries. Stocks in emerging markets may also be purchased. This process draws heavily upon T. Rowe Price's proprietary stock research expertise. While the fund maintains a well-diversified portfolio, its manager may at a particular time shift stock selection toward markets or market sectors that appear to offer attractive value and appreciation potential.</font></p> <p style="margin: 0in 0in 6pt;"><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">Much the same security selection process applies to bonds. For example, when deciding on whether to adjust allocations to high <font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>yield (junk) bonds, the manager will weigh such factors as the outlook for the economy and corporate earnings and the yield advantage lower-rated bonds offer over investment-grade bonds. The fund will invest in bonds which may include foreign issues that are primarily investment grade (top four credit ratings) and are chosen from across the entire government, corporate, and <font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>asset- and <font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>mortgage-backed bond markets. Maturities will reflect the manager's outlook for interest rates.</font></p> <p style="margin: 0in 0in 6pt;"><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">The fund may invest up to 35% of its total assets in foreign securities.<font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font></font></p> <div><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt" color="black">In pursuing its investment objective, the fund has the discretion to deviate from its normal investment criteria, as previously described, and purchase securities that the fund's management believes will provide an opportunity for substantial appreciation. These situations might arise when the fund's management believes a security could increase in value for a variety of reasons, including an extraordinary corporate event, a new product introduction or innovation, a favorable competitive development, or a change in management.</font></font> </div> <p style="margin: 0in 0in 6pt;" class="MetaData"><font style="line-height: 12pt; font-family: Berkeley Book; font-size: 10pt;" lang="EN-US" class="_mt"><font color="black" class="_mt"><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font></font></font></p> <p style="margin: 0in 0in 6pt;"><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt" color="black">Securities may be sold for a variety of reasons, such as to effect a change in asset allocation, secure a gain, limit a loss, or redeploy assets into more promising opportunities.</font><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"> </font></p></div></div></div></div> </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalseStrategy Narrative [Text Block]19false0rr_RiskHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div class="MetaData"> <p>Principal Risks</p></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNarrative Risk Disclosure.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subsection b falsefalseRisk [Heading]20false0rr_RiskNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> <div class="MetaData"> <div> <div> <div> <div> <p style="margin: 0in 0in 6pt;"><font color="#000000" size="2" class="_mt"><font color="black" class="_mt"><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">As with any mutual fund, there is no guarantee that the fund will achieve its objective.&nbsp;<font class="_mt">The fund's share price fluctuates, which means you could lose money by investing in the fund.</font> The principal risks of investing in this fund are summarized as follows:</font></font></font></p></div></div></div> <div> <div> <p style="margin: 0in 0in 6pt;"><font color="black" class="_mt"><b><i><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">Asset allocation </font></i></b><i><font style="font-family: Berkeley; vertical-align: baseline;" class="_mt"><i><font style="line-height: 12pt; font-family: Berkeley; letter-spacing: 0pt; font-size: 10pt; text-decoration: none;" lang="EN-US" class="_mt"><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font></font></i></font></i><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font></font><b><i><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>risk<font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font></font></i></b><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>&nbsp; <font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>The fund's <font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>overall allocations to stocks and bonds, and the <font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>allocations to the various asset classes and market sectors <font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>within those broad categories, <font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>could cause the fund to underperform other funds with a similar investment objective.</font></font></p> <p style="margin: 0in 0in 6pt;"><font color="black" class="_mt"><b><i><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">Risks of stock </font></i></b><i><font style="font-family: Berkeley; vertical-align: baseline;" class="_mt"><i><font style="line-height: 12pt; font-family: Berkeley; letter-spacing: 0pt; font-size: 10pt; text-decoration: none;" lang="EN-US" class="_mt"><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font></font></i></font></i><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font></font><b><i><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>investing<font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font></font></i></b><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>&nbsp; <font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>Stocks generally fluctuate in value more than bonds and may decline significantly over short time periods. There is <font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>a <font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>chance that stock prices overall will decline because stock markets tend to move in cycles, with periods of rising prices and falling prices. The value of a stock in which the fund invests may decline due to general weakness in the stock market or because of factors that affect a company or a particular industry.</font></font></p> <p style="margin: 0in 0in 6pt;"><font color="black" class="_mt"><b><i><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">Risks of bond </font></i></b><i><font style="font-family: Berkeley; vertical-align: baseline;" class="_mt"><i><font style="line-height: 12pt; font-family: Berkeley; letter-spacing: 0pt; font-size: 10pt; text-decoration: none;" lang="EN-US" class="_mt"><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font></font></i></font></i><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font></font><b><i><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>investing<font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font></font></i></b><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>&nbsp;<font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>Bonds have three main sources of risk. </font><b><i><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">Interest rate risk</font></i></b><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"> is the risk that a rise in interest rates will cause the price of a debt security held by the fund to fall. Securities with longer maturities typically suffer greater declines than those with shorter maturities. Mortgage-backed securities can react somewhat differently to interest rate changes because falling rates can cause losses of principal due to increased mortgage prepayments and rising rates can lead to decreased prepayments and greater volatility. </font></font><font color="black" class="_mt"><b><i><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">Credit risk</font></i></b><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"> is the risk that an issuer of a debt security will default (fail to make scheduled interest or principal payments), potentially reducing the fund's income level and share price. This risk is increased when a security is downgraded or the perceived creditworthiness of the issuer deteriorates. </font><b><i><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">Liquidity risk</font></i></b><b><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"> </font></b><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">is the risk that the fund may not be able to sell a security <font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>in a <font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>timely <font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>manner <font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>or at a desired price.</font></font></p> <p style="margin: 0in 0in 6pt;"><font color="black" class="_mt"><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">While the fund's bond investments are expected to primarily be investment-grade, the fund may <font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>invest in bonds that are rated below investment-grade, <font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>also <font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>known as<font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>high <font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>yield <font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>or <font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>junk <font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font>bonds, including those with the lowest credit rating. High <font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>yield bond issuers are more likely to suffer an adverse change in financial condition that would result in the inability to meet a financial obligation. <font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>Accordingly, the </font><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">securities they issue carry a higher risk of default and should be considered speculative.<font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>The fund's exposure to credit risk, in particular, is increased to the extent it invests in high <font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>yield bonds.</font></font></p> <p style="margin: 0in 0in 6pt;"><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"><font color="black" class="_mt"><b><i><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">Foreign investing </font></i></b><i><font style="font-family: Berkeley; vertical-align: baseline;" class="_mt"><i><font style="line-height: 12pt; font-family: Berkeley; letter-spacing: 0pt; font-size: 10pt; text-decoration: none;" lang="EN-US" class="_mt"><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font></font></i></font></i><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font></font><b><i><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>risk<font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font></font></i></b><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>&nbsp; <font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>This is the risk that the fund's investments in foreign securities may be adversely affected by political and economic conditions overseas, reduced liquidity, or decreases in foreign currency values relative to the U.S. dollar.</font></font></font> <font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"> </font></p></div></div></div></div> </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringNarrative Risk Disclosure. 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font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt"><font class="_mt"><font style="line-height: 12pt; font-family: Berkeley Book; font-size: 10pt;" lang="EN-US" class="_mt" color="black">The </font><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">bar chart showing calendar year returns and the average annual total returns table indicate risk by illustrating how much returns can differ from one year to the next and how fund performance compares with that of a comparable market index. </font></font><font class="_mt"><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">The fund's past performance (before and after taxes) is not necessarily an indication of future performance.</font></font></font></p> <p style="margin: 0in 0in 6pt;"><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">The fund can also experience short-term performance swings, as shown by the best and worst calendar quarter returns during the years depicted.</font></p> <p style="margin: 0in 0in 6pt;"><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">In addition, the average annual total returns table shows hypothetical after-tax returns to suggest how taxes paid by a shareholder may influence returns.&nbsp;<font class="_mt">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.</font> Actual after-tax returns depend on an investor's tax situation and may differ from those shown. <font class="_mt"><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">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 individual retirement account <font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font><font style="display: none; font-family: times; color: red; font-size: 12px;" class="_mt"> </font>.</font></font></font></p></div> </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalsePerformance Narrative [Text Block]23false0rr_BarChartHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div class="MetaData"> <p>Balanced Fund</p> <p>Calander Year Returns</p></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalseBar Chart [Heading]24false0rr_BarChartTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> &lt;div style="display:none;" &gt;~ http://troweprice.com/role/ScheduleAnnualTotalReturnsTRowePriceBalancedFundIncBarChart column period compact * column primary compact * row dei_LegalEntityAxis compact cik000871839_S000002068Member row rr_ProspectusShareClassAxis compact * ~&lt;/div&gt; </div>falsefalseBarChart1.jpg<div> &lt;div style="display:none;" &gt;~ http://troweprice.com/role/ScheduleAnnualTotalReturnsTRowePriceBalancedFundIncBarChart column period compact * column primary compact * row dei_LegalEntityAxis compact cik000871839_S000002068Member row rr_ProspectusShareClassAxis compact * ~&lt;/div&gt; </div>falsehttp://troweprice.com/role/ScheduleAnnualTotalReturnsTRowePriceBalancedFundIncBarChartfalsefalse000106 - Schedule - Annual Total Returns - {T. Rowe Price Balanced Fund, Inc.} {Bar Chart}truefalsefalse1falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*5false0rr_AnnualReturn2001rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.0398-0.0398falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalseAnnual Return 2001duration2011-05-01T00:00:002011-05-01T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$2falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*6false0rr_AnnualReturn2002rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.0854-0.0854falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalseAnnual Return 2002duration2011-05-01T00:00:002011-05-01T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$3falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*7false0rr_AnnualReturn2003rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.21710.2171falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalseAnnual Return 2003duration2011-05-01T00:00:002011-05-01T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$4falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*8false0rr_AnnualReturn2004rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.10320.1032falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalseAnnual Return 2004duration2011-05-01T00:00:002011-05-01T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$5falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*9false0rr_AnnualReturn2005rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.05520.0552falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalseAnnual Return 2005duration2011-05-01T00:00:002011-05-01T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$6falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*10false0rr_AnnualReturn2006rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.13730.1373falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalseAnnual Return 2006duration2011-05-01T00:00:002011-05-01T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$7falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*11false0rr_AnnualReturn2007rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.07180.0718falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalseAnnual Return 2007duration2011-05-01T00:00:002011-05-01T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$8falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*12false0rr_AnnualReturn2008rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.2843-0.2843falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalseAnnual Return 2008duration2011-05-01T00:00:002011-05-01T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$9falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*13false0rr_AnnualReturn2009rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.28280.2828falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalseAnnual Return 2009duration2011-05-01T00:00:002011-05-01T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$10falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*14false0rr_AnnualReturn2010rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.12510.1251falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalseAnnual Return 2010duration2011-05-01T00:00:002011-05-01T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowdei_LegalEntityAxisAxiscik000871839_S000002068MemberRowrr_ProspectusShareClassAxisAxis*falsefalseT. Rowe Price Balanced Fund, Inc.dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik000871839_S000002068Memberdei_LegalEntityAxisexplicitMemberfalsefalseT. Rowe Price Balanced Fund, Inc.rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik000871839_C000005423Memberrr_ProspectusShareClassAxisexplicitMemberT. Rowe Price Balanced Fund, Inc.T. Rowe Price Balanced Fund, Inc.0truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.0398-0.0398falsefalsefalsetruefalse2truetruefalse-0.0854-0.0854falsefalsefalsetruefalse3truetruefalse0.21710.2171falsefalsefalsetruefalse4truetruefalse0.10320.1032falsefalsefalsetruefalse5truetruefalse0.05520.0552falsefalsefalsetruefalse6truetruefalse0.13730.1373falsefalsefalsetruefalse7truetruefalse0.07180.0718falsefalsefalsetruefalse8truetruefalse-0.2843-0.2843falsefalsefalsetruefalse9truetruefalse0.28280.2828falsefalsefalsetruefalse10truetruefalse0.12510.1251falsefalsefalsetruefalseOthernanafalsefalseT. Rowe Price Balanced Fund, Inc.101Annual Total Returns - UnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*Rowdei_LegalEntityAxisAxiscik000871839_S000002068MemberRowrr_ProspectusShareClassAxisAxis*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to BarChartData.No authoritative reference available.falsefalseBar Chart [Table]25false0rr_BarChartClosingTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> <div class="MetaData"> <p style="line-height: 115%; margin: 0in 0in 10pt; font-family: 'Calibri','sans-serif'; font-size: 11pt;" class="MsoNormal">Best Quarter&nbsp;&nbsp; 06/30/09&nbsp;&nbsp; 15.41</p> <p style="line-height: 115%; margin: 0in 0in 10pt; font-family: 'Calibri','sans-serif'; font-size: 11pt;" class="MsoNormal">Worst Quarter&nbsp;&nbsp; 12/31/08&nbsp;&nbsp; -15.68</p></div> </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalseBar Chart Closing [Text Block]26false0rr_PerformanceTableHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div class="MetaData"> <p style="margin: 0in 0in 0pt;"><b><font style="font-family: MetaBoldLF-Italic; font-size: 8pt;" class="_mt" color="#004f7c">Average Annual Total Returns<font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font></font></b></p><strong><font color="#008080" class="_mt" style="font-family: Times;"> </font></strong> <p style="text-align: center; margin: 0in 0in 0pt;" align="center"><b><font style="font-family: MetaBoldLF-Italic; font-size: 8pt;" class="_mt" color="#004f7c"><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>Periods ended<font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font></font></b></p> <p style="text-align: center; margin: 0in 0in 0pt;" align="center"><b><font style="font-family: MetaBoldLF-Italic; font-size: 8pt;" class="_mt" color="#004f7c"><font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>December 31, 2010<font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font></font></b></p></div>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit c -Subsection b falsefalsePerformance Table Heading27false0rr_PerformanceTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> &lt;div style="display:none;" &gt;~ http://troweprice.com/role/ScheduleAverageAnnualTotalReturnsTransposedTRowePriceBalancedFundInc row period compact * row primary compact * column dei_LegalEntityAxis compact cik000871839_S000002068Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * ~&lt;/div&gt; </div>falsefalse<div> &lt;div style="display:none;" &gt;~ http://troweprice.com/role/ScheduleAverageAnnualTotalReturnsTransposedTRowePriceBalancedFundInc row period compact * row primary compact * column dei_LegalEntityAxis compact cik000871839_S000002068Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * ~&lt;/div&gt; </div>truehttp://troweprice.com/role/ScheduleAverageAnnualTotalReturnsTransposedTRowePriceBalancedFundIncfalsefalse000107 - Schedule - Average Annual Total Returns {Transposed} - {T. Rowe Price Balanced Fund, Inc.}truefalsefalse1falseColumnperiodPeriod*ColumnprimaryElement*5false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.12510.1251falsefalsefalsetruefalse2truetruetrue0.11850.1185falsefalsefalsetruefalse3truetruetrue0.08340.0834falsefalsefalsetruefalse4truetruetrue0.12410.1241falsefalsefalsetruefalse5truetruetrue0.11700.1170[1]falsefalsefalsetruefalse6truetruetrue0.11900.1190falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse1 Yearduration2011-05-01T00:00:002011-05-01T00:00:00falseUSDfalsefalse$2falseColumnperiodPeriod*ColumnprimaryElement*6false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.04720.0472falsefalsefalsetruefalse2truetruetrue0.03610.0361falsefalsefalsetruefalse3truetruetrue0.03660.0366falsefalsefalsetruefalse4truetruetrue0.05500.0550falsefalsefalsetruefalse5truetruetrue0.03910.0391[1]falsefalsefalsetruefalse6truetruetrue0.03910.0391falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse5 Yearsduration2011-05-01T00:00:002011-05-01T00:00:00falseUSDfalsefalse$3falseColumnperiodPeriod*ColumnprimaryElement*7false0rr_AverageAnnualReturnYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.04590.0459falsefalsefalsetruefalse2truetruetrue0.03510.0351falsefalsefalsetruefalse3truetruetrue0.03480.0348falsefalsefalsetruefalse4truetruetrue0.05680.0568falsefalsefalsetruefalse5truetruetrue0.03680.0368[1]falsefalsefalsetruefalse6truetruetrue0.03710.0371falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalse10 Yearsduration2011-05-01T00:00:002011-05-01T00:00:00falseUSDfalsefalse$1falseRowdei_LegalEntityAxisAxiscik000871839_S000002068MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*falsefalseT. Rowe Price Balanced Fund, Inc.dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik000871839_S000002068Memberdei_LegalEntityAxisexplicitMemberfalsefalseT. Rowe Price Balanced Fund, Inc.rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik000871839_C000005423Memberrr_ProspectusShareClassAxisexplicitMembertruefalseBefore Taxesrr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberT. Rowe Price Balanced Fund, Inc.T. Rowe Price Balanced Fund, Inc.Before TaxesUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.12510.1251falsefalsefalsetruefalse2truetruetrue0.04720.0472falsefalsefalsetruefalse3truetruetrue0.04590.0459falsefalsefalsetruefalseOthernanafalsefalseT. Rowe Price Balanced Fund, Inc.2falseRowdei_LegalEntityAxisAxiscik000871839_S000002068MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*falsefalseT. Rowe Price Balanced Fund, Inc.dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik000871839_S000002068Memberdei_LegalEntityAxisexplicitMemberfalsefalseT. Rowe Price Balanced Fund, Inc.rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik000871839_C000005423Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseReturns after taxes on distributionsrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsAndSalesMemberrr_PerformanceMeasureAxisexplicitMemberT. Rowe Price Balanced Fund, Inc.T. Rowe Price Balanced Fund, Inc.Returns after taxes on distributionsStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.11850.1185falsefalsefalsetruefalse2truetruetrue0.03610.0361falsefalsefalsetruefalse3truetruetrue0.03510.0351falsefalsefalsetruefalseOthernanafalsefalseT. Rowe Price Balanced Fund, Inc. Returns after taxes on distributions3falseRowdei_LegalEntityAxisAxiscik000871839_S000002068MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*falsefalseT. Rowe Price Balanced Fund, Inc.dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik000871839_S000002068Memberdei_LegalEntityAxisexplicitMemberfalsefalseT. Rowe Price Balanced Fund, Inc.rr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik000871839_C000005423Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseReturns after taxes on distributions and sale of fund sharesrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsMemberrr_PerformanceMeasureAxisexplicitMemberT. Rowe Price Balanced Fund, Inc.T. Rowe Price Balanced Fund, Inc.Returns after taxes on distributions and sale of fund sharesStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.08340.0834falsefalsefalsetruefalse2truetruetrue0.03660.0366falsefalsefalsetruefalse3truetruetrue0.03480.0348falsefalsefalsetruefalseOthernanafalsefalseT. Rowe Price Balanced Fund, Inc. Returns after taxes on distributions and sale of fund shares4falseRowdei_LegalEntityAxisAxiscik000871839_S000002068MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*falsefalseT. Rowe Price Balanced Fund, Inc.dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik000871839_S000002068Memberdei_LegalEntityAxisexplicitMembertruefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberfalsefalseMorningstar Moderate Target Risk Indexrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicik000871839_MorningstarModerateTargetRiskIndexMemberrr_PerformanceMeasureAxisexplicitMemberT. Rowe Price Balanced Fund, Inc.Share ClassesMorningstar Moderate Target Risk IndexStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.12410.1241falsefalsefalsetruefalse2truetruetrue0.05500.0550falsefalsefalsetruefalse3truetruetrue0.05680.0568falsefalsefalsetruefalseOthernanafalsefalseT. Rowe Price Balanced Fund, Inc. Morningstar Moderate Target Risk Index5falseRowdei_LegalEntityAxisAxiscik000871839_S000002068MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*falsefalseT. Rowe Price Balanced Fund, Inc.dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik000871839_S000002068Memberdei_LegalEntityAxisexplicitMembertruefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberfalsefalseCombined Index Portfoliorr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicik000871839_CombinedIndexPortfolioMemberrr_PerformanceMeasureAxisexplicitMemberT. Rowe Price Balanced Fund, Inc.Share ClassesCombined Index PortfolioStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[1]1truetruetrue0.11700.1170falsefalsefalsetruefalse2truetruetrue0.03910.0391falsefalsefalsetruefalse3truetruetrue0.03680.0368falsefalsefalsetruefalseOthernanafalsefalseT. Rowe Price Balanced Fund, Inc. Combined Index Portfolio6falseRowdei_LegalEntityAxisAxiscik000871839_S000002068MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*falsefalseT. Rowe Price Balanced Fund, Inc.dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik000871839_S000002068Memberdei_LegalEntityAxisexplicitMembertruefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberfalsefalseLipper Balanced Funds Indexrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicik000871839_LipperBalancedFundsIndexMemberrr_PerformanceMeasureAxisexplicitMemberT. Rowe Price Balanced Fund, Inc.Share ClassesLipper Balanced Funds IndexStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.11900.1190falsefalsefalsetruefalse2truetruetrue0.03910.0391falsefalsefalsetruefalse3truetruetrue0.03710.0371falsefalsefalsetruefalseOthernanafalsefalseT. Rowe Price Balanced Fund, Inc. Lipper Balanced Funds Index1 Combined Index Portfolio is an unmanaged portfolio composed of 50% domestic stocks (S&amp;P 500 Index), 40% bonds (Barclays Capital U.S. Aggregate Index), and 10% international stocks (MSCI EAFE Index) through April 30, 2008. From May 1, 2008, the portfolio is composed of 52% domestic stocks (S&amp;P 500 Index), 35% bonds (Barclays Capital U.S. Aggregate Index), and 13% international stocks (MSCI EAFE Index).36Average Annual Total Returns - UnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*ColumnprimaryElement*Rowdei_LegalEntityAxisAxiscik000871839_S000002068MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to PerformanceTableData.No authoritative reference available.falsefalsePerformance [Table]28false0rr_PerformanceTableClosingTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> <div class="MetaData"> <p style="margin: 0in 0in 6pt;"><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">Updated performance information is available through&nbsp;<font class="_mt">troweprice.com</font> or may be obtained by calling <font class="_mt"><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt">1<font style="display: none; font-family: times; color: teal; font-size: 12px;" class="_mt"> </font>-800-225-5132</font><font style="line-height: 12pt; font-family: ITC Berkeley Oldstyle Std Bk; font-size: 10pt;" lang="EN-US" class="_mt" color="black">.&nbsp;</font></font></font></p></div> </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringIf the Fund has annual returns for at least one calendar year, provide a table showing the Fund's (A) average annual total return; (B) average annual total return (after taxes on distributions); and (C) average annual total return (after taxes on distributions and redemption). A Money Market Fund should show only the returns described in clause (A) of the preceding sentence. All returns should be shown for 1-, 5-, and 10- calendar year periods ending on the date of the most recently completed calendar year (or for the life of the Fund, if shorter), but only for periods subsequent to the effective date of the Fund's registration statement. The table also shouldshow the returns of an appropriate broadbased securities market index as defined in Instruction 5 to Item 22(b)(7) for the same periods. A Fund that has been in existence for more than 10 years also may include returns for the life of the Fund. A Money Market Fund may provide the Fund's 7-day yield ending on the date of the most recent calendar year or disclose a toll-free (or collect) telephone number that investors can use to obtain the Fund's current 7-day yield. For a Fund (other than a Money Market Fund or a Fund described in General Instruction C.3.(d)(iii)), provide the information in the following table with the specified captions AVERAGE ANNUAL TOTAL RETURNS (For the periods ended December 31, _____)Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Subsection b falsefalsePerformance Table Closing [Text Block]126Risk/Return Summary - (T. Rowe Price Balanced Fund, Inc.) (T. Rowe Price Balanced Fund, Inc.)UnKnownUnKnownUnKnownUnKnownfalsetrue