<?xml version="1.0" encoding="us-ascii" standalone="yes"?>
<!-- EDGAR Online I-Metrix Xcelerate Instance Document, based on XBRL 2.1  http://www.edgar-online.com/ -->
<!-- Version:  6.20.1 -->
<!-- Round: 1 -->
<!-- Creation date: 2012-11-30T19:41:17Z -->
<!-- Copyright (c) 2005-2011 EDGAR Online, Inc. All Rights Reserved. -->
<xbrl xmlns="http://www.xbrl.org/2003/instance" xmlns:xbrll="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:iso4217="http://www.xbrl.org/2003/iso4217" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ck0000812303="http://www.americanfunds.com/20120930" xmlns:dei="http://xbrl.sec.gov/dei/2012-01-31" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:rr="http://xbrl.sec.gov/rr/2012-01-31" xmlns:utr="http://www.xbrl.org/2009/utr" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:xbrldt="http://xbrl.org/2005/xbrldt">
  <xbrll:schemaRef xlink:type="simple" xlink:arcrole="http://www.xbrl.org/2003/linkbase" xlink:href="ck0000812303-20120930.xsd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xbrll="http://www.xbrl.org/2003/linkbase" />
  <dei:DocumentType contextRef="eol_0000051931-12-000808_STD_1_20121201_0" id="id_517000_269BA95A-6081-47F5-83EA-06EC121DC149_1_3">485BPOS</dei:DocumentType>
  <dei:DocumentPeriodEndDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0" id="id_517000_269BA95A-6081-47F5-83EA-06EC121DC149_1_5">2012-09-30</dei:DocumentPeriodEndDate>
  <dei:EntityCentralIndexKey contextRef="eol_0000051931-12-000808_STD_1_20121201_0" id="id_517000_6D135065-0B00-4C0A-81BD-1803616B26E6_1_1">0000812303</dei:EntityCentralIndexKey>
  <dei:DocumentEffectiveDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0" id="id_517000_269BA95A-6081-47F5-83EA-06EC121DC149_1_1">2012-12-01</dei:DocumentEffectiveDate>
  <dei:EntityRegistrantName contextRef="eol_0000051931-12-000808_STD_1_20121201_0" id="id_517000_6D135065-0B00-4C0A-81BD-1803616B26E6_1_0">CAPITAL WORLD BOND FUND</dei:EntityRegistrantName>
  <dei:AmendmentFlag contextRef="eol_0000051931-12-000808_STD_1_20121201_0" id="id_517000_269BA95A-6081-47F5-83EA-06EC121DC149_1_4">false</dei:AmendmentFlag>
  <dei:DocumentCreationDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0" id="id_517000_269BA95A-6081-47F5-83EA-06EC121DC149_1_0">2012-11-29</dei:DocumentCreationDate>
  <rr:ProspectusDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0" id="id_517000_269BA95A-6081-47F5-83EA-06EC121DC149_1_2">2012-12-01</rr:ProspectusDate>
  <rr:RiskNondiversifiedStatus contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_39">As a nondiversified fund, the fund has the ability to invest a larger percentage of
its assets in the securities of a smaller number of issuers than a diversified fund.
Although the fund does not intend to limit its investments to the securities of a
small number of issuers, if it were to do so, poor performance by a single large
holding would adversely impact the fund&apos;s investment results more than if the
fund were invested in a larger number of issuers.</rr:RiskNondiversifiedStatus>
  <rr:PortfolioTurnoverTextBlock contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_32">&lt;tt&gt;The fund pays transaction costs, such as commissions, when it buys and sells &lt;br /&gt;securities (or "turns over" its portfolio). A higher portfolio turnover rate &lt;br /&gt;may indicate higher transaction costs and may result in higher taxes when &lt;br /&gt;fund shares are held in a taxable account. These costs, which are not &lt;br /&gt;reflected in annual fund operating expenses or in the example, affect the &lt;br /&gt;fund&apos;s investment results. During the most recent fiscal year, the fund&apos;s &lt;br /&gt;portfolio turnover rate was 142% of the average value of its portfolio.&lt;/tt&gt;</rr:PortfolioTurnoverTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_117">&lt;div style="display:none"&gt;~ http://www.americanfunds.com/role/ExpenseExample_S000009240Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_115">&lt;div style="display:none"&gt;~ http://www.americanfunds.com/role/BarChartData_S000009240Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:BarChartTableTextBlock>
  <rr:ObjectivePrimaryTextBlock contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_3">&lt;tt&gt;The fund&apos;s investment objective is to provide you, over the long term, with a&lt;br /&gt;high level of total return consistent with prudent investment management. Total&lt;br /&gt;return comprises the income generated by the fund and the changes in the market&lt;br /&gt;value of the fund&apos;s investments.&lt;/tt&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_20">&lt;tt&gt;This example is intended to help you compare the cost of investing in&lt;br /&gt;the fund with the cost of investing in other mutual funds.&lt;br /&gt; &lt;br /&gt;The example assumes that you invest $10,000 in the fund for the time periods&lt;br /&gt;indicated and then redeem all of your shares at the end of those periods. The&lt;br /&gt;example also assumes that your investment has a 5% return each year and that the&lt;br /&gt;fund&apos;s operating expenses remain the same.&lt;/tt&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyNarrativeTextBlock contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_35">&lt;tt&gt;Under normal market circumstances, the fund will invest at least 80% of its&lt;br /&gt;assets in bonds. The fund invests primarily in debt securities of governmental,&lt;br /&gt;supranational and corporate issuers denominated in various currencies, including&lt;br /&gt;U.S. dollars. The fund may invest substantially in securities of issuers&lt;br /&gt;domiciled outside the United States, including issuers domiciled in developing&lt;br /&gt;countries. Normally the fund&apos;s debt obligations will consist substantially of&lt;br /&gt;investment-grade bonds (rated Baa3 or better or BBB- or better by Nationally&lt;br /&gt;Recognized Statistical Rating Organizations designated by the fund&apos;s investment&lt;br /&gt;adviser or unrated but determined to be of equivalent quality by the fund&apos;s&lt;br /&gt;investment adviser). The fund may also invest up to 25% of its assets in lower&lt;br /&gt;quality, higher yielding debt securities (rated Ba1 or below and BB+ or below by&lt;br /&gt;Nationally Recognized Statistical Rating Organizations designated by the fund&apos;s&lt;br /&gt;investment adviser or unrated but determined to be of equivalent quality by the&lt;br /&gt;fund&apos;s investment adviser). Such securities are sometimes referred to as "junk&lt;br /&gt;bonds." The total return of the fund will be the result of interest income,&lt;br /&gt;changes in the market value of the fund&apos;s investments and changes in the values&lt;br /&gt;of other currencies relative to the U.S. dollar.&lt;br /&gt; &lt;br /&gt;The fund is nondiversified, which allows it to invest a greater percentage of&lt;br /&gt;its assets in any one issuer than would otherwise be the case. However, the fund&lt;br /&gt;intends to limit its investments in the securities of any single issuer.&lt;br /&gt; &lt;br /&gt;The investment adviser uses a system of multiple portfolio counselors in&lt;br /&gt;managing the fund&apos;s assets. Under this approach, the portfolio of the fund is&lt;br /&gt;divided into segments managed by individual counselors who decide how their&lt;br /&gt;respective segments will be invested.&lt;br /&gt; &lt;br /&gt;The fund relies on the professional judgment of its investment adviser to make&lt;br /&gt;decisions about the fund&apos;s portfolio investments. The basic investment philosophy &lt;br /&gt;of the investment adviser is to seek to invest in attractively priced securities &lt;br /&gt;that, in its opinion, represent good, long-term investment opportunities. The &lt;br /&gt;investment adviser believes that an important way to accomplish this is through &lt;br /&gt;fundamental analysis, which may include meeting with government officials, &lt;br /&gt;central banks and company executives. Securities may be sold when the investment &lt;br /&gt;adviser believes that they no longer represent relatively attractive investment &lt;br /&gt;opportunities.&lt;/tt&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskReturnHeading contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_1">Capital World Bond Fund&#174;</rr:RiskReturnHeading>
  <rr:ExpenseBreakpointDiscounts contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_6">You may qualify for sales charge discounts if you and your family invest, or agree
to invest in the future, at least $100,000 in American Funds.</rr:ExpenseBreakpointDiscounts>
  <rr:ExpenseExampleHeading contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_19">Example</rr:ExpenseExampleHeading>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_70">After-tax returns are calculated using the highest individual federal income
tax rates in effect during each year of the periods shown and do not reflect
the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:ObjectiveHeading contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_2">Investment objective</rr:ObjectiveHeading>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_45">Past investment results (before and after taxes) are not predictive of future investment results.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:RiskLoseMoney contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_38">You may lose money by investing in the fund.</rr:RiskLoseMoney>
  <rr:RiskHeading contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_36">Principal risks</rr:RiskHeading>
  <rr:ShareholderFeesCaption contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_8">Shareholder fees (fees paid directly from your investment)</rr:ShareholderFeesCaption>
  <rr:ExpenseExampleByYearCaption contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_21">Although your actual costs may be higher or lower, based on these assumptions your costs would be:</rr:ExpenseExampleByYearCaption>
  <rr:PortfolioTurnoverRate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_33">1.42</rr:PortfolioTurnoverRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_71">Your actual after-tax returns depend on your individual tax situation and likely
will differ from the results shown above. In addition, after-tax returns are not
relevant if you hold your fund shares through a tax-favored arrangement, such as
a 401(k) plan, individual retirement account (IRA) or 529 college savings plan.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:BarChartHeading contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_46">Calendar year total returns for Class A shares (Results do not include a sales
charge; if a sales charge were included, results would be lower.)</rr:BarChartHeading>
  <rr:BarChartDoesNotReflectSalesLoads contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_48">(Results do not include a sales charge; if a sales charge were included, results would be lower)</rr:BarChartDoesNotReflectSalesLoads>
  <rr:BarChartAndPerformanceTableHeading contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_41">Investment results</rr:BarChartAndPerformanceTableHeading>
  <rr:ExpenseBreakpointMinimumInvestmentRequiredAmount contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_7">100000</rr:ExpenseBreakpointMinimumInvestmentRequiredAmount>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_43">The following bar chart shows how the fund&apos;s investment results have varied from
year to year, and the following table shows how the fund&apos;s average annual total
returns for various periods compare with different broad measures of market results.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:BarChartClosingTextBlock contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_68">&lt;tt&gt;Highest/Lowest quarterly results during this period were:&lt;br /&gt;&lt;br /&gt;Highest 8.45%(quarter ended December 31, 2004)&lt;br /&gt;&lt;br /&gt;Lowest -5.51% (quarter ended September 30, 2008)&lt;br /&gt;&lt;br /&gt;The fund&apos;s total return for the nine months ended September 30, 2011, was 6.99%&lt;/tt&gt;</rr:BarChartClosingTextBlock>
  <rr:OperatingExpensesCaption contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_14">Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)</rr:OperatingExpensesCaption>
  <rr:AverageAnnualReturnCaption contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_73">Average annual total returns For the periods ended December 31, 2011 (with maximum sales charge):</rr:AverageAnnualReturnCaption>
  <rr:BarChartNarrativeTextBlock contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_47">&lt;tt&gt;The following bar chart shows how the fund&apos;s investment results have varied from&lt;br /&gt;year to year, and the following table shows how the fund&apos;s average annual total&lt;br /&gt;returns for various periods compare with different broad measures of market&lt;br /&gt;results.&lt;/tt&gt;</rr:BarChartNarrativeTextBlock>
  <rr:PortfolioTurnoverHeading contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_31">Portfolio turnover</rr:PortfolioTurnoverHeading>
  <rr:RiskNarrativeTextBlock contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_37">&lt;tt&gt;This section describes the principal risks associated with the fund&apos;s principal&lt;br /&gt;investment strategies. You may lose money by investing in the fund. The&lt;br /&gt;likelihood of loss may be greater if you invest for a shorter period of time.&lt;br /&gt; &lt;br /&gt;Market conditions -- The prices of, and the income generated by, the securities&lt;br /&gt;held by the fund may decline due to market conditions and other factors,&lt;br /&gt;including those directly involving the issuers of securities held by the fund.&lt;br /&gt; &lt;br /&gt;Investing in bonds -- Rising interest rates will generally cause the prices of&lt;br /&gt;bonds and other debt securities to fall. Longer maturity debt securities may be&lt;br /&gt;subject to greater price fluctuations than shorter maturity debt securities. In&lt;br /&gt;addition, falling interest rates may cause an issuer to redeem, call or refinance &lt;br /&gt;a security before its stated maturity, which may result in the fund having to &lt;br /&gt;reinvest the proceeds in lower yielding securities.&lt;br /&gt; &lt;br /&gt;Bonds and other debt securities are subject to credit risk, which is the&lt;br /&gt;possibility that the credit strength of an issuer will weaken and/or an issuer&lt;br /&gt;of a debt security will fail to make timely payments of principal or interest&lt;br /&gt;and the security will go into default.&lt;br /&gt;&lt;br /&gt;Thinly traded securities -- There may be little trading in the secondary market&lt;br /&gt;for particular bonds or other debt securities, which may make them more&lt;br /&gt;difficult to value, acquire or sell.&lt;br /&gt; &lt;br /&gt;Investing in lower rated bonds -- Lower rated bonds and other lower rated debt&lt;br /&gt;securities generally have higher rates of interest and involve greater risk of&lt;br /&gt;default or price declines due to changes in the issuer&apos;s creditworthiness than&lt;br /&gt;those of higher quality debt securities. The market prices of these securities&lt;br /&gt;may fluctuate more than the prices of higher quality debt securities and may&lt;br /&gt;decline significantly in periods of general economic difficulty. These risks &lt;br /&gt;may be increased with respect to investments in junk bonds.&lt;br /&gt; &lt;br /&gt;Currency -- The prices of, and the income generated by, many debt securities held&lt;br /&gt;by the fund may also be affected by changes in relative currency values.&lt;br /&gt; &lt;br /&gt;Investing outside the United States -- Securities of issuers domiciled outside&lt;br /&gt;the United States, or with significant operations outside the United States, may&lt;br /&gt;lose value because of adverse political, social, economic or market developments&lt;br /&gt;in the countries or regions in which the issuer operates. These securities may&lt;br /&gt;also lose value due to changes in foreign currency exchange rates against the&lt;br /&gt;U.S. dollar and/or currencies of other countries. Securities markets in certain&lt;br /&gt;countries may be more volatile and/or less liquid than those in the United&lt;br /&gt;States. Investments outside the United States may also be subject to different&lt;br /&gt;settlement and accounting practices and different regulatory, legal and&lt;br /&gt;reporting standards, and may be more difficult to value, than those in the&lt;br /&gt;United States. The risks of investing outside the United States may be&lt;br /&gt;heightened in connection with investments in emerging markets.&lt;br /&gt; &lt;br /&gt;Investing in emerging markets -- Investing in emerging markets may involve risks&lt;br /&gt;in addition to and greater than those generally associated with investing in&lt;br /&gt;developed countries. For instance, developing countries may have less developed&lt;br /&gt;legal and accounting systems than those in developed countries. The governments&lt;br /&gt;of these countries may be less stable and more likely to impose capital&lt;br /&gt;controls, nationalize a company or industry, place restrictions on foreign&lt;br /&gt;ownership and on withdrawing sale proceeds of securities from the country,&lt;br /&gt;and/or impose punitive taxes that could adversely affect the prices of&lt;br /&gt;securities. In addition, the economies of these countries may be dependent on&lt;br /&gt;relatively few industries that are more susceptible to local and global changes.&lt;br /&gt;Securities markets in these countries can also be relatively small and have&lt;br /&gt;substantially lower trading volumes. As a result, securities issued in these&lt;br /&gt;countries may be more volatile and less liquid, and may be more difficult to&lt;br /&gt;value, than securities issued in countries with more developed economies and/or&lt;br /&gt;markets. Additionally, there may be increased settlement risks for transactions&lt;br /&gt;in local securities.&lt;br /&gt; &lt;br /&gt;Nondiversification risks -- As a nondiversified fund, the fund has the ability to&lt;br /&gt;invest a larger percentage of its assets in the securities of a smaller number&lt;br /&gt;of issuers than a diversified fund. Although the fund does not intend to limit&lt;br /&gt;its investments to the securities of a small number of issuers, if it were to do&lt;br /&gt;so, poor performance by a single large holding would adversely impact the fund&apos;s&lt;br /&gt;investment results more than if the fund were invested in a larger number of&lt;br /&gt;issuers.&lt;br /&gt;&lt;br /&gt;Management -- The investment adviser to the fund actively manages the fund&apos;s&lt;br /&gt;investments. Consequently, the fund is subject to the risk that the methods &lt;br /&gt;and analyses employed by the investment adviser in this process may not produce &lt;br /&gt;the desired results. This could cause the fund to lose value or its investment&lt;br /&gt;results to lag relevant benchmarks or other funds with similar objectives.&lt;br /&gt; &lt;br /&gt;Your investment in the fund is not a bank deposit and is not insured or&lt;br /&gt;guaranteed by the Federal Deposit Insurance Corporation or any other&lt;br /&gt;governmental agency, entity or person. You should consider how this fund &lt;br /&gt;fits into your overall investment program.&lt;/tt&gt;</rr:RiskNarrativeTextBlock>
  <rr:ExpenseHeading contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_4">Fees and expenses of the fund</rr:ExpenseHeading>
  <rr:PerformanceTableOneClassOfAfterTaxShown contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_72">After-tax returns are shown only for Class A shares; after-tax returns for other share classes will vary.</rr:PerformanceTableOneClassOfAfterTaxShown>
  <rr:StrategyHeading contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_34">Principal investment strategies</rr:StrategyHeading>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_44">americanfunds.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformanceNarrativeTextBlock contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_42">&lt;tt&gt;The following bar chart shows how the fund&apos;s investment results have varied from&lt;br /&gt;year to year, and the following table shows how the fund&apos;s average annual total&lt;br /&gt;returns for various periods compare with different broad measures of market&lt;br /&gt;results. This information provides some indication of the risks of investing &lt;br /&gt;in the fund. The Citigroup World Government Bond Index also reflects certain&lt;br /&gt;countries in which the fund may invest. The Lipper Global Income Funds Index&lt;br /&gt;includes the fund and other funds that disclose investment objectives and/or&lt;br /&gt;strategies reasonably comparable to the fund&apos;s objective and/or strategies. The&lt;br /&gt;Consumer Price Index provides a comparison of the fund&apos;s results to inflation.&lt;br /&gt;Past investment results (before and after taxes) are not predictive of future&lt;br /&gt;investment results. Updated information on the fund&apos;s investment results can be&lt;br /&gt;obtained by visiting americanfunds.com.&lt;/tt&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_5">&lt;tt&gt;This table describes the fees and expenses that you may pay if you buy and hold&lt;br /&gt;shares of the fund. You may qualify for sales charge discounts if you and your&lt;br /&gt;family invest, or agree to invest in the future, at least $100,000 in American&lt;br /&gt;Funds. More information about these and other discounts is available from your&lt;br /&gt;financial professional and in the "Sales charge reductions and waivers" section&lt;br /&gt;on page 27 of the prospectus and on page 64 of the fund&apos;s statement of&lt;br /&gt;additional information.&lt;/tt&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_119">&lt;div style="display:none"&gt;~ http://www.americanfunds.com/role/OperatingExpensesData_S000009240Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleNoRedemptionByYearCaption contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_26">For the share classes listed below, you would pay the following if you did not redeem your shares:</rr:ExpenseExampleNoRedemptionByYearCaption>
  <rr:PerformanceTableTextBlock contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_120">&lt;div style="display:none"&gt;~ http://www.americanfunds.com/role/PerformanceTableData_S000009240Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact *  ~&lt;/div&gt;</rr:PerformanceTableTextBlock>
  <rr:PerformanceTableNarrativeTextBlock contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_69">&lt;tt&gt;After-tax returns are shown only for Class A shares; after-tax returns for other&lt;br /&gt;share classes will vary. After-tax returns are calculated using the highest&lt;br /&gt;individual federal income tax rates in effect during each year of the periods&lt;br /&gt;shown and do not reflect the impact of state and local taxes. Your actual&lt;br /&gt;after-tax returns depend on your individual tax situation and likely will differ&lt;br /&gt;from the results shown above. In addition, after-tax returns are not relevant if&lt;br /&gt;you hold your fund shares through a tax-favored arrangement, such as a 401(k)&lt;br /&gt;plan, individual retirement account (IRA) or 529 college savings plan.&lt;/tt&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_40">Your investment in the fund is not a bank deposit and is not insured or guaranteed
by the Federal Deposit Insurance Corporation or any other governmental agency,
entity or person.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:ExpenseExampleNoRedemptionTableTextBlock contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_118">&lt;div style="display:none"&gt;~ http://www.americanfunds.com/role/ExpenseExampleNoRedemption_S000009240Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:ExpenseExampleNoRedemptionTableTextBlock>
  <rr:PerformanceTableFootnotesTextBlock contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_114">&lt;tt&gt;Class A annualized 30-day yield at September 30, 2012: 1.33%&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;(For current yield information, please call American FundsLine&amp;#xAE; &lt;br /&gt;at 800/325-3590.)&lt;/tt&gt;</rr:PerformanceTableFootnotesTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1001_116">&lt;div style="display:none"&gt;~ http://www.americanfunds.com/role/ShareholderFeesData_S000009240Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:ShareholderFeesTableTextBlock>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984087" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_2001_106">Consumer Price Index</rr:AverageAnnualReturnLabel>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984087" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_2001_107">0.0296</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984087" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_2001_108">0.0226</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984087" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_2001_109">0.0248</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984087" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_2001_110">0.0284</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984087" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_2001_111">1987-08-04</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984149" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_3001_101">Lipper Global Income Funds Index (reflects no deductions for sales charges, account fees or taxes)</rr:AverageAnnualReturnLabel>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984149" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_3001_102">0.0380</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984149" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_3001_103">0.0556</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984149" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_3001_104">0.0658</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984149" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_3001_105">1987-08-04</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984160" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_4001_95">Citigroup World Government Bond Index (reflects no deductions for sales charges, account fees, expenses or taxes)</rr:AverageAnnualReturnLabel>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984160" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_4001_96">0.0635</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984160" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_4001_97">0.0713</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984160" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_4001_98">0.0777</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984160" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_4001_99">0.0739</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984160" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_4001_100">1987-08-04</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984166" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_5001_90">Barclays Global Aggregate Index (reflects no deductions for sales charges, account fees, expenses or taxes)</rr:AverageAnnualReturnLabel>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984166" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_5001_91">0.0564</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984166" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_5001_92">0.0646</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984166" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_5001_93">0.0716</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984166" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_5001_94">1987-08-04</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x602366_602488x-9979532" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_6002_85">Share class A - After taxes on distributions and sale of fund shares</rr:AverageAnnualReturnLabel>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x602366_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_6002_86">-0.0006</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x602366_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_6002_87">0.0323</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x602366_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_6002_88">0.0555</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x602366_602488x-9979532" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_6002_89">1987-08-04</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x602395_602488x-9979532" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_7002_80">Share class A - After taxes on distributions</rr:AverageAnnualReturnLabel>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x602395_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_7002_81">-0.0131</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x602395_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_7002_82">0.0331</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x602395_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_7002_83">0.0590</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x602395_602488x-9979532" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_7002_84">1987-08-04</rr:AverageAnnualReturnInceptionDate>
  <dei:TradingSymbol contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979517" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1017_0">RCWGX</dei:TradingSymbol>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979517" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1017_9">0.0000</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979517" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1017_74">Share class R-6 (before taxes)</rr:AverageAnnualReturnLabel>
  <rr:ExpenseExampleYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979517" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1017_22">53</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979517" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1017_23">167</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979517" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1017_25">653</rr:ExpenseExampleYear10>
  <rr:RedemptionFeeOverRedemption contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979517" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1017_12">0.00</rr:RedemptionFeeOverRedemption>
  <rr:ExpenseExampleYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979517" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1017_24">291</rr:ExpenseExampleYear05>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979517" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1017_75">0.0411</rr:AverageAnnualReturnYear01>
  <rr:OtherExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979517" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1017_17">0.0008</rr:OtherExpensesOverAssets>
  <rr:ManagementFeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979517" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1017_15">0.0044</rr:ManagementFeesOverAssets>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979517" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1017_11">0.00</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979517" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1017_16">0.0000</rr:DistributionAndService12b1FeesOverAssets>
  <rr:ExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979517" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1017_18">0.0052</rr:ExpensesOverAssets>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979517" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1017_78">0.0885</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979517" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1017_79">2009-05-01</rr:AverageAnnualReturnInceptionDate>
  <rr:MaximumDeferredSalesChargeOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979517" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1017_10">0.0000</rr:MaximumDeferredSalesChargeOverOfferingPrice>
  <dei:TradingSymbol contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979518" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1006_0">BFWFX</dei:TradingSymbol>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979518" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1006_9">0.0000</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979518" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1006_74">Share class F-2 (before taxes)</rr:AverageAnnualReturnLabel>
  <rr:ExpenseExampleYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979518" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1006_22">63</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979518" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1006_23">199</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979518" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1006_25">774</rr:ExpenseExampleYear10>
  <rr:RedemptionFeeOverRedemption contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979518" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1006_12">0.00</rr:RedemptionFeeOverRedemption>
  <rr:ExpenseExampleYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979518" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1006_24">346</rr:ExpenseExampleYear05>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979518" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1006_75">0.0401</rr:AverageAnnualReturnYear01>
  <rr:OtherExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979518" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1006_17">0.0018</rr:OtherExpensesOverAssets>
  <rr:ManagementFeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979518" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1006_15">0.0044</rr:ManagementFeesOverAssets>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979518" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1006_11">0.00</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979518" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1006_16">0.0000</rr:DistributionAndService12b1FeesOverAssets>
  <rr:ExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979518" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1006_18">0.0062</rr:ExpensesOverAssets>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979518" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1006_78">0.0499</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979518" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1006_79">2008-08-01</rr:AverageAnnualReturnInceptionDate>
  <rr:MaximumDeferredSalesChargeOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979518" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1006_10">0.0000</rr:MaximumDeferredSalesChargeOverOfferingPrice>
  <dei:TradingSymbol contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979519" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1011_0">CCWFX</dei:TradingSymbol>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979519" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1011_9">0.0000</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979519" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1011_74">Share class 529-F-1 (before taxes)</rr:AverageAnnualReturnLabel>
  <rr:ExpenseExampleYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979519" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1011_22">96</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979519" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1011_23">279</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979519" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1011_25">1035</rr:ExpenseExampleYear10>
  <rr:RedemptionFeeOverRedemption contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979519" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1011_12">0.00</rr:RedemptionFeeOverRedemption>
  <rr:ExpenseExampleYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979519" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1011_24">476</rr:ExpenseExampleYear05>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979519" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1011_75">0.0391</rr:AverageAnnualReturnYear01>
  <rr:OtherExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979519" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1011_17">0.0031</rr:OtherExpensesOverAssets>
  <rr:ManagementFeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979519" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1011_15">0.0044</rr:ManagementFeesOverAssets>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979519" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1011_76">0.0575</rr:AverageAnnualReturnYear05>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979519" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1011_11">0.00</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979519" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1011_16">0.0000</rr:DistributionAndService12b1FeesOverAssets>
  <rr:ExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979519" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1011_18">0.0075</rr:ExpensesOverAssets>
  <rr:MaximumAccountFee contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979519" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1011_13">10</rr:MaximumAccountFee>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979519" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1011_78">0.0761</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979519" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1011_79">2002-09-17</rr:AverageAnnualReturnInceptionDate>
  <rr:MaximumDeferredSalesChargeOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979519" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1011_10">0.0000</rr:MaximumDeferredSalesChargeOverOfferingPrice>
  <dei:TradingSymbol contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979520" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1010_0">CCWEX</dei:TradingSymbol>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979520" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1010_9">0.0000</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979520" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1010_74">Share class 529-E (before taxes)</rr:AverageAnnualReturnLabel>
  <rr:ExpenseExampleYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979520" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1010_22">143</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979520" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1010_23">423</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979520" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1010_25">1568</rr:ExpenseExampleYear10>
  <rr:RedemptionFeeOverRedemption contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979520" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1010_12">0.00</rr:RedemptionFeeOverRedemption>
  <rr:ExpenseExampleYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979520" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1010_24">723</rr:ExpenseExampleYear05>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979520" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1010_75">0.0342</rr:AverageAnnualReturnYear01>
  <rr:OtherExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979520" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1010_17">0.0027</rr:OtherExpensesOverAssets>
  <rr:ManagementFeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979520" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1010_15">0.0044</rr:ManagementFeesOverAssets>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979520" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1010_76">0.0523</rr:AverageAnnualReturnYear05>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979520" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1010_11">0.00</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979520" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1010_16">0.0050</rr:DistributionAndService12b1FeesOverAssets>
  <rr:ExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979520" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1010_18">0.0121</rr:ExpensesOverAssets>
  <rr:MaximumAccountFee contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979520" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1010_13">10</rr:MaximumAccountFee>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979520" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1010_78">0.0743</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979520" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1010_79">2002-05-16</rr:AverageAnnualReturnInceptionDate>
  <rr:MaximumDeferredSalesChargeOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979520" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1010_10">0.0000</rr:MaximumDeferredSalesChargeOverOfferingPrice>
  <dei:TradingSymbol contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979521" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1009_0">CCWCX</dei:TradingSymbol>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979521" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1009_9">0.0000</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979521" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1009_74">Share class 529-C (before taxes)</rr:AverageAnnualReturnLabel>
  <rr:ExpenseExampleYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979521" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1009_22">299</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleNoRedemptionYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979521" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1009_27">199</rr:ExpenseExampleNoRedemptionYear01>
  <rr:ExpenseExampleYear03 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979521" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1009_23">593</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979521" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1009_25">2171</rr:ExpenseExampleYear10>
  <rr:RedemptionFeeOverRedemption contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979521" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1009_12">0.00</rr:RedemptionFeeOverRedemption>
  <rr:ExpenseExampleYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979521" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1009_24">1011</rr:ExpenseExampleYear05>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979521" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1009_75">0.0189</rr:AverageAnnualReturnYear01>
  <rr:OtherExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979521" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1009_17">0.0032</rr:OtherExpensesOverAssets>
  <rr:ManagementFeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979521" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1009_15">0.0044</rr:ManagementFeesOverAssets>
  <rr:ExpenseExampleNoRedemptionYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979521" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1009_30">2171</rr:ExpenseExampleNoRedemptionYear10>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979521" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1009_76">0.0470</rr:AverageAnnualReturnYear05>
  <rr:ExpenseExampleNoRedemptionYear03 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979521" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1009_28">593</rr:ExpenseExampleNoRedemptionYear03>
  <rr:ExpenseExampleNoRedemptionYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979521" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1009_29">1011</rr:ExpenseExampleNoRedemptionYear05>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979521" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1009_11">0.00</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979521" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1009_16">0.0100</rr:DistributionAndService12b1FeesOverAssets>
  <rr:ExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979521" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1009_18">0.0176</rr:ExpensesOverAssets>
  <rr:MaximumAccountFee contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979521" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1009_13">10</rr:MaximumAccountFee>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979521" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1009_78">0.0705</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979521" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1009_79">2002-02-28</rr:AverageAnnualReturnInceptionDate>
  <rr:MaximumDeferredSalesChargeOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979521" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1009_10">0.0100</rr:MaximumDeferredSalesChargeOverOfferingPrice>
  <dei:TradingSymbol contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979522" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1008_0">CCWBX</dei:TradingSymbol>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979522" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1008_9">0.0000</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979522" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1008_74">Share class 529-B (before taxes)</rr:AverageAnnualReturnLabel>
  <rr:ExpenseExampleYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979522" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1008_22">700</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleNoRedemptionYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979522" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1008_27">200</rr:ExpenseExampleNoRedemptionYear01>
  <rr:ExpenseExampleYear03 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979522" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1008_23">996</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979522" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1008_25">1973</rr:ExpenseExampleYear10>
  <rr:RedemptionFeeOverRedemption contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979522" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1008_12">0.00</rr:RedemptionFeeOverRedemption>
  <rr:ExpenseExampleYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979522" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1008_24">1216</rr:ExpenseExampleYear05>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979522" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1008_75">-0.0213</rr:AverageAnnualReturnYear01>
  <rr:OtherExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979522" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1008_17">0.0033</rr:OtherExpensesOverAssets>
  <rr:ManagementFeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979522" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1008_15">0.0044</rr:ManagementFeesOverAssets>
  <rr:ExpenseExampleNoRedemptionYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979522" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1008_30">1973</rr:ExpenseExampleNoRedemptionYear10>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979522" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1008_76">0.0435</rr:AverageAnnualReturnYear05>
  <rr:ExpenseExampleNoRedemptionYear03 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979522" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1008_28">596</rr:ExpenseExampleNoRedemptionYear03>
  <rr:ExpenseExampleNoRedemptionYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979522" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1008_29">1016</rr:ExpenseExampleNoRedemptionYear05>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979522" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1008_11">0.00</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979522" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1008_16">0.0100</rr:DistributionAndService12b1FeesOverAssets>
  <rr:ExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979522" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1008_18">0.0177</rr:ExpensesOverAssets>
  <rr:MaximumAccountFee contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979522" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1008_13">10</rr:MaximumAccountFee>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979522" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1008_78">0.0721</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979522" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1008_79">2002-02-25</rr:AverageAnnualReturnInceptionDate>
  <rr:MaximumDeferredSalesChargeOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979522" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1008_10">0.0500</rr:MaximumDeferredSalesChargeOverOfferingPrice>
  <dei:TradingSymbol contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979523" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1007_0">CCWAX</dei:TradingSymbol>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979523" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1007_9">0.0375</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979523" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1007_74">Share class 529-A (before taxes)</rr:AverageAnnualReturnLabel>
  <rr:ExpenseExampleYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979523" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1007_22">490</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979523" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1007_23">712</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979523" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1007_25">1623</rr:ExpenseExampleYear10>
  <rr:RedemptionFeeOverRedemption contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979523" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1007_12">0.00</rr:RedemptionFeeOverRedemption>
  <rr:ExpenseExampleYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979523" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1007_24">949</rr:ExpenseExampleYear05>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979523" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1007_75">-0.0017</rr:AverageAnnualReturnYear01>
  <rr:OtherExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979523" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1007_17">0.0032</rr:OtherExpensesOverAssets>
  <rr:ManagementFeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979523" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1007_15">0.0044</rr:ManagementFeesOverAssets>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979523" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1007_76">0.0474</rr:AverageAnnualReturnYear05>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979523" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1007_11">0.00</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979523" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1007_16">0.0021</rr:DistributionAndService12b1FeesOverAssets>
  <rr:ExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979523" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1007_18">0.0097</rr:ExpensesOverAssets>
  <rr:MaximumAccountFee contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979523" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1007_13">10</rr:MaximumAccountFee>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979523" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1007_78">0.0749</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979523" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1007_79">2002-02-15</rr:AverageAnnualReturnInceptionDate>
  <rr:MaximumDeferredSalesChargeOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979523" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1007_10">0.0100</rr:MaximumDeferredSalesChargeOverOfferingPrice>
  <dei:TradingSymbol contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979524" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1005_0">WBFFX</dei:TradingSymbol>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979524" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1005_9">0.0000</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979524" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1005_74">Share class F-1 (before taxes)</rr:AverageAnnualReturnLabel>
  <rr:ExpenseExampleYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979524" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1005_22">90</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979524" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1005_23">281</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979524" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1005_25">1084</rr:ExpenseExampleYear10>
  <rr:RedemptionFeeOverRedemption contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979524" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1005_12">0.00</rr:RedemptionFeeOverRedemption>
  <rr:ExpenseExampleYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979524" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1005_24">488</rr:ExpenseExampleYear05>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979524" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1005_75">0.0376</rr:AverageAnnualReturnYear01>
  <rr:OtherExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979524" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1005_17">0.0019</rr:OtherExpensesOverAssets>
  <rr:ManagementFeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979524" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1005_15">0.0044</rr:ManagementFeesOverAssets>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979524" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1005_76">0.0560</rr:AverageAnnualReturnYear05>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979524" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1005_11">0.00</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979524" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1005_16">0.0025</rr:DistributionAndService12b1FeesOverAssets>
  <rr:AverageAnnualReturnYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979524" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1005_77">0.0778</rr:AverageAnnualReturnYear10>
  <rr:ExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979524" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1005_18">0.0088</rr:ExpensesOverAssets>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979524" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1005_78">0.0737</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979524" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1005_79">2001-03-16</rr:AverageAnnualReturnInceptionDate>
  <rr:MaximumDeferredSalesChargeOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979524" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1005_10">0.0000</rr:MaximumDeferredSalesChargeOverOfferingPrice>
  <dei:TradingSymbol contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979525" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1004_0">CWBCX</dei:TradingSymbol>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979525" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1004_9">0.0000</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979525" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1004_74">Share class C (before taxes)</rr:AverageAnnualReturnLabel>
  <rr:ExpenseExampleYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979525" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1004_22">271</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleNoRedemptionYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979525" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1004_27">171</rr:ExpenseExampleNoRedemptionYear01>
  <rr:ExpenseExampleYear03 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979525" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1004_23">530</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979525" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1004_25">1987</rr:ExpenseExampleYear10>
  <rr:RedemptionFeeOverRedemption contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979525" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1004_12">0.00</rr:RedemptionFeeOverRedemption>
  <rr:ExpenseExampleYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979525" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1004_24">913</rr:ExpenseExampleYear05>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979525" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1004_75">0.0198</rr:AverageAnnualReturnYear01>
  <rr:OtherExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979525" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1004_17">0.0024</rr:OtherExpensesOverAssets>
  <rr:ManagementFeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979525" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1004_15">0.0044</rr:ManagementFeesOverAssets>
  <rr:ExpenseExampleNoRedemptionYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979525" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1004_30">1987</rr:ExpenseExampleNoRedemptionYear10>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979525" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1004_76">0.0476</rr:AverageAnnualReturnYear05>
  <rr:ExpenseExampleNoRedemptionYear03 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979525" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1004_28">530</rr:ExpenseExampleNoRedemptionYear03>
  <rr:ExpenseExampleNoRedemptionYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979525" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1004_29">913</rr:ExpenseExampleNoRedemptionYear05>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979525" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1004_11">0.00</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979525" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1004_16">0.0100</rr:DistributionAndService12b1FeesOverAssets>
  <rr:AverageAnnualReturnYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979525" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1004_77">0.0693</rr:AverageAnnualReturnYear10>
  <rr:ExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979525" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1004_18">0.0168</rr:ExpensesOverAssets>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979525" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1004_78">0.0654</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979525" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1004_79">2001-03-15</rr:AverageAnnualReturnInceptionDate>
  <rr:MaximumDeferredSalesChargeOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979525" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1004_10">0.0100</rr:MaximumDeferredSalesChargeOverOfferingPrice>
  <dei:TradingSymbol contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979526" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1003_0">WBFBX</dei:TradingSymbol>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979526" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1003_9">0.0000</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979526" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1003_74">Share class B (before taxes)</rr:AverageAnnualReturnLabel>
  <rr:ExpenseExampleYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979526" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1003_22">668</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleNoRedemptionYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979526" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1003_27">168</rr:ExpenseExampleNoRedemptionYear01>
  <rr:ExpenseExampleYear03 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979526" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1003_23">920</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979526" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1003_25">1752</rr:ExpenseExampleYear10>
  <rr:RedemptionFeeOverRedemption contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979526" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1003_12">0.00</rr:RedemptionFeeOverRedemption>
  <rr:ExpenseExampleYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979526" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1003_24">1097</rr:ExpenseExampleYear05>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979526" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1003_75">-0.0201</rr:AverageAnnualReturnYear01>
  <rr:OtherExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979526" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1003_17">0.0021</rr:OtherExpensesOverAssets>
  <rr:ManagementFeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979526" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1003_15">0.0044</rr:ManagementFeesOverAssets>
  <rr:ExpenseExampleNoRedemptionYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979526" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1003_30">1752</rr:ExpenseExampleNoRedemptionYear10>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979526" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1003_76">0.0447</rr:AverageAnnualReturnYear05>
  <rr:ExpenseExampleNoRedemptionYear03 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979526" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1003_28">520</rr:ExpenseExampleNoRedemptionYear03>
  <rr:ExpenseExampleNoRedemptionYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979526" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1003_29">897</rr:ExpenseExampleNoRedemptionYear05>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979526" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1003_11">0.00</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979526" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1003_16">0.0100</rr:DistributionAndService12b1FeesOverAssets>
  <rr:AverageAnnualReturnYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979526" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1003_77">0.0713</rr:AverageAnnualReturnYear10>
  <rr:ExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979526" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1003_18">0.0165</rr:ExpensesOverAssets>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979526" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1003_78">0.0641</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979526" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1003_79">2000-03-15</rr:AverageAnnualReturnInceptionDate>
  <rr:MaximumDeferredSalesChargeOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979526" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1003_10">0.0500</rr:MaximumDeferredSalesChargeOverOfferingPrice>
  <dei:TradingSymbol contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979527" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1016_0">RCWFX</dei:TradingSymbol>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979527" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1016_9">0.0000</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979527" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1016_74">Share class R-5 (before taxes)</rr:AverageAnnualReturnLabel>
  <rr:ExpenseExampleYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979527" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1016_22">58</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979527" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1016_23">183</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979527" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1016_25">714</rr:ExpenseExampleYear10>
  <rr:RedemptionFeeOverRedemption contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979527" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1016_12">0.00</rr:RedemptionFeeOverRedemption>
  <rr:ExpenseExampleYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979527" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1016_24">318</rr:ExpenseExampleYear05>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979527" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1016_75">0.0411</rr:AverageAnnualReturnYear01>
  <rr:OtherExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979527" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1016_17">0.0013</rr:OtherExpensesOverAssets>
  <rr:ManagementFeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979527" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1016_15">0.0044</rr:ManagementFeesOverAssets>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979527" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1016_76">0.0590</rr:AverageAnnualReturnYear05>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979527" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1016_11">0.00</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979527" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1016_16">0.0000</rr:DistributionAndService12b1FeesOverAssets>
  <rr:ExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979527" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1016_18">0.0057</rr:ExpensesOverAssets>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979527" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1016_78">0.0814</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979527" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1016_79">2002-05-15</rr:AverageAnnualReturnInceptionDate>
  <rr:MaximumDeferredSalesChargeOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979527" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1016_10">0.0000</rr:MaximumDeferredSalesChargeOverOfferingPrice>
  <dei:TradingSymbol contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979528" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1015_0">RCWEX</dei:TradingSymbol>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979528" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1015_9">0.0000</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979528" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1015_74">Share class R-4 (before taxes)</rr:AverageAnnualReturnLabel>
  <rr:ExpenseExampleYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979528" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1015_22">89</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979528" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1015_23">278</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979528" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1015_25">1073</rr:ExpenseExampleYear10>
  <rr:RedemptionFeeOverRedemption contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979528" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1015_12">0.00</rr:RedemptionFeeOverRedemption>
  <rr:ExpenseExampleYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979528" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1015_24">482</rr:ExpenseExampleYear05>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979528" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1015_75">0.0375</rr:AverageAnnualReturnYear01>
  <rr:OtherExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979528" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1015_17">0.0018</rr:OtherExpensesOverAssets>
  <rr:ManagementFeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979528" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1015_15">0.0044</rr:ManagementFeesOverAssets>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979528" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1015_76">0.0559</rr:AverageAnnualReturnYear05>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979528" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1015_11">0.00</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979528" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1015_16">0.0025</rr:DistributionAndService12b1FeesOverAssets>
  <rr:ExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979528" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1015_18">0.0087</rr:ExpensesOverAssets>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979528" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1015_78">0.0762</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979528" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1015_79">2002-08-15</rr:AverageAnnualReturnInceptionDate>
  <rr:MaximumDeferredSalesChargeOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979528" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1015_10">0.0000</rr:MaximumDeferredSalesChargeOverOfferingPrice>
  <dei:TradingSymbol contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979529" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1014_0">RCWCX</dei:TradingSymbol>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979529" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1014_9">0.0000</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979529" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1014_74">Share class R-3 (before taxes)</rr:AverageAnnualReturnLabel>
  <rr:ExpenseExampleYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979529" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1014_22">123</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979529" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1014_23">384</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979529" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1014_25">1466</rr:ExpenseExampleYear10>
  <rr:RedemptionFeeOverRedemption contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979529" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1014_12">0.00</rr:RedemptionFeeOverRedemption>
  <rr:ExpenseExampleYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979529" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1014_24">665</rr:ExpenseExampleYear05>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979529" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1014_75">0.0346</rr:AverageAnnualReturnYear01>
  <rr:OtherExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979529" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1014_17">0.0027</rr:OtherExpensesOverAssets>
  <rr:ManagementFeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979529" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1014_15">0.0044</rr:ManagementFeesOverAssets>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979529" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1014_76">0.0523</rr:AverageAnnualReturnYear05>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979529" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1014_11">0.00</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979529" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1014_16">0.0050</rr:DistributionAndService12b1FeesOverAssets>
  <rr:ExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979529" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1014_18">0.0121</rr:ExpensesOverAssets>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979529" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1014_78">0.0700</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979529" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1014_79">2002-07-16</rr:AverageAnnualReturnInceptionDate>
  <rr:MaximumDeferredSalesChargeOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979529" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1014_10">0.0000</rr:MaximumDeferredSalesChargeOverOfferingPrice>
  <dei:TradingSymbol contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979530" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1013_0">RCWBX</dei:TradingSymbol>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979530" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1013_9">0.0000</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979530" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1013_74">Share class R-2 (before taxes)</rr:AverageAnnualReturnLabel>
  <rr:ExpenseExampleYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979530" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1013_22">173</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979530" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1013_23">536</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979530" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1013_25">2009</rr:ExpenseExampleYear10>
  <rr:RedemptionFeeOverRedemption contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979530" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1013_12">0.00</rr:RedemptionFeeOverRedemption>
  <rr:ExpenseExampleYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979530" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1013_24">923</rr:ExpenseExampleYear05>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979530" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1013_75">0.0299</rr:AverageAnnualReturnYear01>
  <rr:OtherExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979530" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1013_17">0.0052</rr:OtherExpensesOverAssets>
  <rr:ManagementFeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979530" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1013_15">0.0044</rr:ManagementFeesOverAssets>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979530" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1013_76">0.0478</rr:AverageAnnualReturnYear05>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979530" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1013_11">0.00</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979530" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1013_16">0.0074</rr:DistributionAndService12b1FeesOverAssets>
  <rr:ExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979530" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1013_18">0.0170</rr:ExpensesOverAssets>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979530" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1013_78">0.0666</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979530" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1013_79">2002-07-09</rr:AverageAnnualReturnInceptionDate>
  <rr:MaximumDeferredSalesChargeOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979530" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1013_10">0.0000</rr:MaximumDeferredSalesChargeOverOfferingPrice>
  <dei:TradingSymbol contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979531" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1012_0">RCWAX</dei:TradingSymbol>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979531" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1012_9">0.0000</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979531" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1012_74">Share class R-1 (before taxes)</rr:AverageAnnualReturnLabel>
  <rr:ExpenseExampleYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979531" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1012_22">166</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979531" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1012_23">514</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979531" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1012_25">1933</rr:ExpenseExampleYear10>
  <rr:RedemptionFeeOverRedemption contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979531" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1012_12">0.00</rr:RedemptionFeeOverRedemption>
  <rr:ExpenseExampleYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979531" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1012_24">887</rr:ExpenseExampleYear05>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979531" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1012_75">0.0296</rr:AverageAnnualReturnYear01>
  <rr:OtherExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979531" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1012_17">0.0020</rr:OtherExpensesOverAssets>
  <rr:ManagementFeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979531" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1012_15">0.0044</rr:ManagementFeesOverAssets>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979531" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1012_76">0.0476</rr:AverageAnnualReturnYear05>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979531" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1012_11">0.00</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979531" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1012_16">0.0099</rr:DistributionAndService12b1FeesOverAssets>
  <rr:ExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979531" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1012_18">0.0163</rr:ExpensesOverAssets>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979531" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1012_78">0.0662</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979531" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1012_79">2002-06-28</rr:AverageAnnualReturnInceptionDate>
  <rr:MaximumDeferredSalesChargeOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979531" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1012_10">0.0000</rr:MaximumDeferredSalesChargeOverOfferingPrice>
  <dei:TradingSymbol contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_0">CWBFX</dei:TradingSymbol>
  <rr:AnnualReturn2002 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_49">0.1645</rr:AnnualReturn2002>
  <rr:LowestQuarterlyReturnLabel contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_65">Lowest</rr:LowestQuarterlyReturnLabel>
  <rr:HighestQuarterlyReturnLabel contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_62">Highest</rr:HighestQuarterlyReturnLabel>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_9">0.0375</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:BarChartYearToDateReturnDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_61">2012-09-30</rr:BarChartYearToDateReturnDate>
  <rr:AverageAnnualReturnLabel contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_74">Share class A - Before taxes</rr:AverageAnnualReturnLabel>
  <rr:ExpenseExampleYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_22">462</rr:ExpenseExampleYear01>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_64">2004-12-31</rr:BarChartHighestQuarterlyReturnDate>
  <rr:ThirtyDayYield contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_113">0.0133</rr:ThirtyDayYield>
  <rr:ExpenseExampleYear03 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_23">648</rr:ExpenseExampleYear03>
  <rr:BarChartLowestQuarterlyReturn contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_66">-0.0551</rr:BarChartLowestQuarterlyReturn>
  <rr:AnnualReturn2004 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_51">0.1138</rr:AnnualReturn2004>
  <rr:AnnualReturn2010 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_57">0.0597</rr:AnnualReturn2010>
  <rr:ExpenseExampleYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_25">1430</rr:ExpenseExampleYear10>
  <rr:RedemptionFeeOverRedemption contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_12">0.00</rr:RedemptionFeeOverRedemption>
  <rr:ExpenseExampleYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="iso4217_USD" decimals="0" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_24">850</rr:ExpenseExampleYear05>
  <rr:AnnualReturn2007 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_54">0.0856</rr:AnnualReturn2007>
  <rr:BarChartHighestQuarterlyReturn contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_63">0.0845</rr:BarChartHighestQuarterlyReturn>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_75">-0.0012</rr:AverageAnnualReturnYear01>
  <rr:OtherExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_17">0.0021</rr:OtherExpensesOverAssets>
  <rr:AnnualReturn2008 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_55">-0.0058</rr:AnnualReturn2008>
  <rr:ManagementFeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_15">0.0044</rr:ManagementFeesOverAssets>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_67">2008-09-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:AnnualReturn2009 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_56">0.1064</rr:AnnualReturn2009>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_76">0.0480</rr:AverageAnnualReturnYear05>
  <rr:AnnualReturn2005 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_52">-0.0286</rr:AnnualReturn2005>
  <rr:YearToDateReturnLabel contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_59">The fund&apos;s total return for the nine months ended</rr:YearToDateReturnLabel>
  <rr:AnnualReturn2011 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_58">0.0380</rr:AnnualReturn2011>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="2" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_11">0.00</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:AnnualReturn2003 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_50">0.1886</rr:AnnualReturn2003>
  <rr:ThirtyDayYieldCaption contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_112">Class A annualized 30-day yield at September 30, 2012:</rr:ThirtyDayYieldCaption>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_16">0.0024</rr:DistributionAndService12b1FeesOverAssets>
  <rr:AverageAnnualReturnYear10 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_77">0.0737</rr:AverageAnnualReturnYear10>
  <rr:ExpensesOverAssets contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_18">0.0089</rr:ExpensesOverAssets>
  <rr:AnnualReturn2006 contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_53">0.0760</rr:AnnualReturn2006>
  <rr:AverageAnnualReturnSinceInception contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_78">0.0704</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_79">1987-08-04</rr:AverageAnnualReturnInceptionDate>
  <rr:BarChartYearToDateReturn contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_60">0.0699</rr:BarChartYearToDateReturn>
  <rr:MaximumDeferredSalesChargeOverOfferingPrice contextRef="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532" unitRef="pure" decimals="4" id="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_10">0.0100</rr:MaximumDeferredSalesChargeOverOfferingPrice>
  <context id="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979532">
    <entity>
      <identifier scheme="http://www.sec.gov/CIK">0000812303</identifier>
      <segment><xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">ck0000812303:SummaryS000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="dei:LegalEntityAxis">ck0000812303:S000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">ck0000812303:C000025175Member</xbrldi:explicitMember></segment>
    </entity>
    <period>
      <startDate>2012-12-01</startDate>
      <endDate>2012-12-01</endDate>
    </period>
  </context>
  <context id="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979531">
    <entity>
      <identifier scheme="http://www.sec.gov/CIK">0000812303</identifier>
      <segment><xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">ck0000812303:SummaryS000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="dei:LegalEntityAxis">ck0000812303:S000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">ck0000812303:C000025176Member</xbrldi:explicitMember></segment>
    </entity>
    <period>
      <startDate>2012-12-01</startDate>
      <endDate>2012-12-01</endDate>
    </period>
  </context>
  <context id="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979530">
    <entity>
      <identifier scheme="http://www.sec.gov/CIK">0000812303</identifier>
      <segment><xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">ck0000812303:SummaryS000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="dei:LegalEntityAxis">ck0000812303:S000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">ck0000812303:C000025177Member</xbrldi:explicitMember></segment>
    </entity>
    <period>
      <startDate>2012-12-01</startDate>
      <endDate>2012-12-01</endDate>
    </period>
  </context>
  <context id="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979529">
    <entity>
      <identifier scheme="http://www.sec.gov/CIK">0000812303</identifier>
      <segment><xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">ck0000812303:SummaryS000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="dei:LegalEntityAxis">ck0000812303:S000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">ck0000812303:C000025178Member</xbrldi:explicitMember></segment>
    </entity>
    <period>
      <startDate>2012-12-01</startDate>
      <endDate>2012-12-01</endDate>
    </period>
  </context>
  <context id="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979528">
    <entity>
      <identifier scheme="http://www.sec.gov/CIK">0000812303</identifier>
      <segment><xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">ck0000812303:SummaryS000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="dei:LegalEntityAxis">ck0000812303:S000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">ck0000812303:C000025179Member</xbrldi:explicitMember></segment>
    </entity>
    <period>
      <startDate>2012-12-01</startDate>
      <endDate>2012-12-01</endDate>
    </period>
  </context>
  <context id="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979527">
    <entity>
      <identifier scheme="http://www.sec.gov/CIK">0000812303</identifier>
      <segment><xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">ck0000812303:SummaryS000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="dei:LegalEntityAxis">ck0000812303:S000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">ck0000812303:C000025180Member</xbrldi:explicitMember></segment>
    </entity>
    <period>
      <startDate>2012-12-01</startDate>
      <endDate>2012-12-01</endDate>
    </period>
  </context>
  <context id="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979526">
    <entity>
      <identifier scheme="http://www.sec.gov/CIK">0000812303</identifier>
      <segment><xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">ck0000812303:SummaryS000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="dei:LegalEntityAxis">ck0000812303:S000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">ck0000812303:C000025181Member</xbrldi:explicitMember></segment>
    </entity>
    <period>
      <startDate>2012-12-01</startDate>
      <endDate>2012-12-01</endDate>
    </period>
  </context>
  <context id="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979525">
    <entity>
      <identifier scheme="http://www.sec.gov/CIK">0000812303</identifier>
      <segment><xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">ck0000812303:SummaryS000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="dei:LegalEntityAxis">ck0000812303:S000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">ck0000812303:C000025182Member</xbrldi:explicitMember></segment>
    </entity>
    <period>
      <startDate>2012-12-01</startDate>
      <endDate>2012-12-01</endDate>
    </period>
  </context>
  <context id="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979524">
    <entity>
      <identifier scheme="http://www.sec.gov/CIK">0000812303</identifier>
      <segment><xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">ck0000812303:SummaryS000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="dei:LegalEntityAxis">ck0000812303:S000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">ck0000812303:C000025183Member</xbrldi:explicitMember></segment>
    </entity>
    <period>
      <startDate>2012-12-01</startDate>
      <endDate>2012-12-01</endDate>
    </period>
  </context>
  <context id="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979523">
    <entity>
      <identifier scheme="http://www.sec.gov/CIK">0000812303</identifier>
      <segment><xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">ck0000812303:SummaryS000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="dei:LegalEntityAxis">ck0000812303:S000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">ck0000812303:C000025184Member</xbrldi:explicitMember></segment>
    </entity>
    <period>
      <startDate>2012-12-01</startDate>
      <endDate>2012-12-01</endDate>
    </period>
  </context>
  <context id="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979522">
    <entity>
      <identifier scheme="http://www.sec.gov/CIK">0000812303</identifier>
      <segment><xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">ck0000812303:SummaryS000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="dei:LegalEntityAxis">ck0000812303:S000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">ck0000812303:C000025185Member</xbrldi:explicitMember></segment>
    </entity>
    <period>
      <startDate>2012-12-01</startDate>
      <endDate>2012-12-01</endDate>
    </period>
  </context>
  <context id="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979521">
    <entity>
      <identifier scheme="http://www.sec.gov/CIK">0000812303</identifier>
      <segment><xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">ck0000812303:SummaryS000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="dei:LegalEntityAxis">ck0000812303:S000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">ck0000812303:C000025186Member</xbrldi:explicitMember></segment>
    </entity>
    <period>
      <startDate>2012-12-01</startDate>
      <endDate>2012-12-01</endDate>
    </period>
  </context>
  <context id="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979520">
    <entity>
      <identifier scheme="http://www.sec.gov/CIK">0000812303</identifier>
      <segment><xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">ck0000812303:SummaryS000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="dei:LegalEntityAxis">ck0000812303:S000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">ck0000812303:C000025187Member</xbrldi:explicitMember></segment>
    </entity>
    <period>
      <startDate>2012-12-01</startDate>
      <endDate>2012-12-01</endDate>
    </period>
  </context>
  <context id="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979519">
    <entity>
      <identifier scheme="http://www.sec.gov/CIK">0000812303</identifier>
      <segment><xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">ck0000812303:SummaryS000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="dei:LegalEntityAxis">ck0000812303:S000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">ck0000812303:C000025188Member</xbrldi:explicitMember></segment>
    </entity>
    <period>
      <startDate>2012-12-01</startDate>
      <endDate>2012-12-01</endDate>
    </period>
  </context>
  <context id="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979518">
    <entity>
      <identifier scheme="http://www.sec.gov/CIK">0000812303</identifier>
      <segment><xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">ck0000812303:SummaryS000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="dei:LegalEntityAxis">ck0000812303:S000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">ck0000812303:C000068532Member</xbrldi:explicitMember></segment>
    </entity>
    <period>
      <startDate>2012-12-01</startDate>
      <endDate>2012-12-01</endDate>
    </period>
  </context>
  <context id="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602488x-9979517">
    <entity>
      <identifier scheme="http://www.sec.gov/CIK">0000812303</identifier>
      <segment><xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">ck0000812303:SummaryS000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="dei:LegalEntityAxis">ck0000812303:S000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">ck0000812303:C000077921Member</xbrldi:explicitMember></segment>
    </entity>
    <period>
      <startDate>2012-12-01</startDate>
      <endDate>2012-12-01</endDate>
    </period>
  </context>
  <context id="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x602395_602488x-9979532">
    <entity>
      <identifier scheme="http://www.sec.gov/CIK">0000812303</identifier>
      <segment><xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">ck0000812303:SummaryS000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="dei:LegalEntityAxis">ck0000812303:S000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">rr:AfterTaxesOnDistributionsMember</xbrldi:explicitMember><xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">ck0000812303:C000025175Member</xbrldi:explicitMember></segment>
    </entity>
    <period>
      <startDate>2012-12-01</startDate>
      <endDate>2012-12-01</endDate>
    </period>
  </context>
  <context id="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x602366_602488x-9979532">
    <entity>
      <identifier scheme="http://www.sec.gov/CIK">0000812303</identifier>
      <segment><xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">ck0000812303:SummaryS000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="dei:LegalEntityAxis">ck0000812303:S000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">rr:AfterTaxesOnDistributionsAndSalesMember</xbrldi:explicitMember><xbrldi:explicitMember dimension="rr:ProspectusShareClassAxis">ck0000812303:C000025175Member</xbrldi:explicitMember></segment>
    </entity>
    <period>
      <startDate>2012-12-01</startDate>
      <endDate>2012-12-01</endDate>
    </period>
  </context>
  <context id="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984166">
    <entity>
      <identifier scheme="http://www.sec.gov/CIK">0000812303</identifier>
      <segment><xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">ck0000812303:SummaryS000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="dei:LegalEntityAxis">ck0000812303:S000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">ck0000812303:RRINDEX00001Member</xbrldi:explicitMember></segment>
    </entity>
    <period>
      <startDate>2012-12-01</startDate>
      <endDate>2012-12-01</endDate>
    </period>
  </context>
  <context id="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984160">
    <entity>
      <identifier scheme="http://www.sec.gov/CIK">0000812303</identifier>
      <segment><xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">ck0000812303:SummaryS000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="dei:LegalEntityAxis">ck0000812303:S000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">ck0000812303:RRINDEX00002Member</xbrldi:explicitMember></segment>
    </entity>
    <period>
      <startDate>2012-12-01</startDate>
      <endDate>2012-12-01</endDate>
    </period>
  </context>
  <context id="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984149">
    <entity>
      <identifier scheme="http://www.sec.gov/CIK">0000812303</identifier>
      <segment><xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">ck0000812303:SummaryS000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="dei:LegalEntityAxis">ck0000812303:S000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">ck0000812303:RRINDEX00003Member</xbrldi:explicitMember></segment>
    </entity>
    <period>
      <startDate>2012-12-01</startDate>
      <endDate>2012-12-01</endDate>
    </period>
  </context>
  <context id="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514_602440x-9984087">
    <entity>
      <identifier scheme="http://www.sec.gov/CIK">0000812303</identifier>
      <segment><xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">ck0000812303:SummaryS000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="dei:LegalEntityAxis">ck0000812303:S000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="rr:PerformanceMeasureAxis">ck0000812303:RRINDEX00004Member</xbrldi:explicitMember></segment>
    </entity>
    <period>
      <startDate>2012-12-01</startDate>
      <endDate>2012-12-01</endDate>
    </period>
  </context>
  <context id="eol_0000051931-12-000808_STD_1_20121201_0_602228x-9979515_602238x-9979514">
    <entity>
      <identifier scheme="http://www.sec.gov/CIK">0000812303</identifier>
      <segment><xbrldi:explicitMember dimension="dei:DocumentInformationDocumentAxis">ck0000812303:SummaryS000009240Member</xbrldi:explicitMember><xbrldi:explicitMember dimension="dei:LegalEntityAxis">ck0000812303:S000009240Member</xbrldi:explicitMember></segment>
    </entity>
    <period>
      <startDate>2012-12-01</startDate>
      <endDate>2012-12-01</endDate>
    </period>
  </context>
  <context id="eol_0000051931-12-000808_STD_1_20121201_0">
    <entity>
      <identifier scheme="http://www.sec.gov/CIK">0000812303</identifier>
    </entity>
    <period>
      <startDate>2012-12-01</startDate>
      <endDate>2012-12-01</endDate>
    </period>
  </context>
  <unit id="pure">
    <measure>pure</measure>
  </unit>
  <unit id="iso4217_USD">
    <measure>iso4217:USD</measure>
  </unit>
  <xbrll:footnoteLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
    <xbrll:loc xlink:href="#id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_10" xlink:label="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_10" xlink:type="locator"/>
    <xbrll:loc xlink:href="#id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1007_10" xlink:label="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1007_10" xlink:type="locator"/>
    <xbrll:footnote xlink:label="footnote_98466789" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">A contingent deferred sales charge of 1.00% applies on certain redemptions within one year following purchases of $1 million or more made without an initial sales charge.</xbrll:footnote>
    <xbrll:footnoteArc xlink:from="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1002_10" xlink:to="footnote_98466789" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" order="1.0" xlink:type="arc"/>
    <xbrll:footnoteArc xlink:from="id_517000_102CF321-361B-43AE-8D51-4AC633BC3643_1007_10" xlink:to="footnote_98466789" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" order="1.0" xlink:type="arc"/>
  </xbrll:footnoteLink>
</xbrl>
