0000792953-12-000064.txt : 20121022 0000792953-12-000064.hdr.sgml : 20121022 20121022154151 ACCESSION NUMBER: 0000792953-12-000064 CONFORMED SUBMISSION TYPE: 485BPOS PUBLIC DOCUMENT COUNT: 7 FILED AS OF DATE: 20121022 DATE AS OF CHANGE: 20121022 EFFECTIVENESS DATE: 20121022 FILER: COMPANY DATA: COMPANY CONFORMED NAME: AMERICAN FUNDS TAX EXEMPT SERIES I CENTRAL INDEX KEY: 0000792953 IRS NUMBER: 526294769 STATE OF INCORPORATION: DE FISCAL YEAR END: 0731 FILING VALUES: FORM TYPE: 485BPOS SEC ACT: 1933 Act SEC FILE NUMBER: 033-05270 FILM NUMBER: 121154644 BUSINESS ADDRESS: STREET 1: 1101 VERMONT AVE NW STREET 2: SUITE 800 CITY: WASHINGTON STATE: DC ZIP: 20005 BUSINESS PHONE: 2028425665 MAIL ADDRESS: STREET 1: 1101 VERMONT AVE NW STREET 2: SUITE 800 CITY: WASHINGTON STATE: DC ZIP: 20005 FILER: COMPANY DATA: COMPANY CONFORMED NAME: AMERICAN FUNDS TAX EXEMPT SERIES I CENTRAL INDEX KEY: 0000792953 IRS NUMBER: 526294769 STATE OF INCORPORATION: DE FISCAL YEAR END: 0731 FILING VALUES: FORM TYPE: 485BPOS SEC ACT: 1940 Act SEC FILE NUMBER: 811-04653 FILM NUMBER: 121154645 BUSINESS ADDRESS: STREET 1: 1101 VERMONT AVE NW STREET 2: SUITE 800 CITY: WASHINGTON STATE: DC ZIP: 20005 BUSINESS PHONE: 2028425665 MAIL ADDRESS: STREET 1: 1101 VERMONT AVE NW STREET 2: SUITE 800 CITY: WASHINGTON STATE: DC ZIP: 20005 0000792953 S000009404 The Tax-Exempt Fund of Maryland C000025748 Class A TMMDX C000025749 Class B TEMBX C000025750 Class C TEMCX C000025751 Class F-1 TMDFX C000025752 Class R-5 RTMFX C000068518 Class F-2 TMMFX 0000792953 S000009405 The Tax-Exempt Fund of Virginia C000025753 Class A TFVAX C000025754 Class B TEVBX C000025755 Class C TEVCX C000025756 Class F-1 TEVFX C000025757 Class R-5 RTVFX C000068519 Class F-2 TEFFX 485BPOS 1 bpos.htm 485BPOS bpos.htm
Securities Act File No. 33-5270
Investment Company Act File No. 811-4653
[Missing Graphic Reference]
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
[Missing Graphic Reference]
FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
    
    
    
[X]
Pre-Effective Amendment No.
    
    
    
[   ]
Post-Effective Amendment No. 39
    
    
    
[X]
             
and/or
 
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940
    
    
    
[X]
Amendment No. 38
    
    
    
[X]
(Check appropriate box or boxes)

 
The American Funds Tax-Exempt Series I
 
 
(Exact Name of Registrant as Specified in Charter)
 
 
1101 Vermont Avenue, N.W.
 
 
Washington, D.C. 20005
 
 
(Address of Principal Executive Offices)
 
 

 
 
Registrant’s Telephone Number, Including Area Code: (202) 842-5665
 
 

 
Jeffrey L. Steele
 
Copies to:
Washington Management Corporation
 
Robert W. Helm, Esq.
1101 Vermont Avenue, N.W.
 
Dechert LLP
Washington, D.C. 20005
 
1775 I Street, N.W.
(Name and Address of Agent for Service)
 
Washington, D.C. 20006
   
(Counsel for the Registrant)

[Missing Graphic Reference]

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

[ X ]
immediately upon filing pursuant to paragraph (b)
 
[   ]
on (date) pursuant to paragraph (b)
 
[   ]
60 days after filing pursuant to paragraph (a)(1)
 
[   ]
on (date) pursuant to paragraph (a)(1)
 
[   ]
75 days after filing pursuant to paragraph (a)(2)
 
[   ]
on (date) pursuant to paragraph (a)(2) of Rule 485

If appropriate, check the following box:

[  ]
 
this post-effective amendment designates a new effective date for a previously filed post-effective amendment.

 
 
 
 

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended (the “1933 Act”), and the Investment Company Act of 1940, as amended, the Registrant, The American Funds Tax-Exempt Series I, has duly caused this Post-Effective Amendment No. 39 to its Registration Statement to be signed on its behalf by the undersigned, thereto duly authorized, in the City of Washington and District of Columbia on the 22nd day of October, 2012.

The American Funds Tax-Exempt Series I

By:    
 
/s/Jeffrey L. Steele            
Jeffrey L. Steele
President
 


Counsel certifies that this Registration Statement meets all the requirements for effectiveness pursuant to Rule 485(b) under the 1933 Act.
By:    
 
/s/Stephanie L. Pfromer            
Stephanie L. Pfromer, Esq.
 


Pursuant to the requirements of the 1933 Act, this Registration Statement has been signed below by the following persons in the capacities indicated on October 22, 2012.

Nariman Farvardin*
    
    
    
James C. Miller III*
 
 Nariman Farvardin        James C. Miller III  
Trustee
    
    
    
Trustee
 
 
    
    
    
   
Barbara Hackman Franklin*
    
    
    
William J. Shaw*
 
 Barbara Hackman Franklin        William J. Shaw  
Trustee
    
    
    
Trustee
 
 
    
    
    
   
R. Clark Hooper*
    
    
    
J. Knox Singleton*
 
 R. Clark Hooper        J. Knox Singleton  
Trustee
    
    
    
Trustee and Chairman of the Board
 
 
    
    
    
   
James H. Lemon, Jr.*
    
    
    
/s/Jeffrey L. Steele
 
 James H. Lemon, Jr.        Jeffrey L. Steele  
Trustee and Vice Chairman of the Board
    
    
    
President and Trustee
 

 
 
By /s/Michael W. Stockton
Michael W. Stockton
    
    
    
 
 
By /s/Jeffrey L. Steele
Jeffrey L. Steele
 
Senior Vice President, Treasurer, Chief Financial Officer and Assistant Secretary
    
    
    
President
 
 
    
    
    
   
*By /s/Michael W. Stockton
Michael W. Stockton
    
    
    
   
Attorney-in-fact
    
    
    
   


 
 
 
 
POWER OF ATTORNEY

The undersigned trustees of The American Funds Tax-Exempt Series I (the “Trust”), a Delaware Statutory Trust, do each hereby revoke all previous powers of attorney that have been signed and otherwise act in his or her name and behalf in matters involving the Trust and do hereby constitute and appoint Michael W. Stockton, Jennifer L. Butler and Stephanie L. Pfromer, or any of them to act as attorneys-in-fact for and in his or her name, place and stead (1) to sign his or her name as a trustee of said Trust to any and all amendments to the Registration Statement of The American Funds Tax-Exempt Series I, File No. 33-5270 under the Securities Act of 1933, as amended, or under the Investment Company Act of 1940, as amended, File No. 811-4653, said amendments to be filed with the Securities and Exchange Commission, and to any and all documents required by any State in the United States of America in which this Trust offers its shares, and (2) to deliver any and all such amendments to such Registration Statement, so signed, for filing with the Securities and Exchange Commission under the provisions of the Securities Act of 1933, as amended, and the Investment Company Act of 1940, as amended, granting to said attorneys-in-fact, and each of them, full power and authority to do and perform every act and thing whatsoever requisite and necessary to be done in and about the premises as fully to all intents and purposes as the undersigned might or could do if personally present, hereby ratifying and approving the acts of said attorneys-in-fact.

EXECUTED at Washington, D.C., this 20th day of September, 2011.


THE AMERICAN FUNDS TAX-EXEMPT SERIES I


\s\ Nariman Farvardin
\s\ James C. Miller III
Nariman Farvardin James C. Miller III
   
\s\ Barbara H. Franklin
\s\ William J. Shaw
Barbara H. Franklin William J. Shaw
   
\s\ R. Clark Hooper
\s\ J. Knox Singleton
R. Clark Hooper J. Knox Singleton
   
\s\ James H. Lemon, Jr.
\s\ Jeffrey L. Steele
James H. Lemon, Jr. Jeffrey L. Steele
 
 
 

EXHIBIT INDEX


EXHIBIT NO.                                        EXHIBIT DESCRIPTION

101.INS
XBRL Instance Document
101.SCH
XBRL Taxonomy Extension Schema Document
101.CAL
XBRL Taxonomy Extension Calculation Linkbase
101.DEF
XBRL Taxonomy Extension Definition Linkbase
101.LAB
XBRL Taxonomy Extension Labels Linkbase
101.PRE
XBRL Taxonomy Extension Presentation Linkbase


EX-101.SCH 3 ck0000792953-20120731.xsd EXTENSION SCHEMA DOCUMENT 00101 - Document - Document And Entity Information {Elements} link:calculationLink link:presentationLink link:definitionLink 01102 - Document - Risk/Return Summary {Unlabeled} (The Tax-Exempt Fund of Maryland) link:calculationLink link:presentationLink link:definitionLink 01103 - Schedule - Shareholder Fees link:calculationLink link:presentationLink link:definitionLink 01104 - Schedule - Annual Fund Operating Expenses link:calculationLink link:presentationLink link:definitionLink 01105 - Schedule - Expense Example {Transposed} link:calculationLink link:presentationLink link:definitionLink 01106 - Schedule - Expense Example, No Redemption {Transposed} link:calculationLink link:presentationLink link:definitionLink 01107 - Schedule - Annual Total Returns link:calculationLink link:presentationLink link:definitionLink 01108 - Schedule - Average Annual Total Returns {Transposed} link:calculationLink link:presentationLink link:definitionLink 06110 - Document - Risk/Return Summary {Unlabeled} (The Tax-Exempt Fund of Virginia) link:calculationLink link:presentationLink link:definitionLink 06111 - Schedule - Shareholder Fees link:calculationLink link:presentationLink link:definitionLink 06112 - Schedule - Annual Fund Operating Expenses link:calculationLink link:presentationLink link:definitionLink 06113 - Schedule - Expense Example {Transposed} link:calculationLink link:presentationLink link:definitionLink 06114 - Schedule - Expense Example, No Redemption {Transposed} link:calculationLink link:presentationLink link:definitionLink 06115 - Schedule - Annual Total Returns link:calculationLink link:presentationLink link:definitionLink 06116 - Schedule - Average Annual Total Returns {Transposed} link:calculationLink link:presentationLink link:definitionLink 06117 - Disclosure - Risk/Return Detail Data {Elements} (The Tax-Exempt Fund of Virginia) link:calculationLink link:presentationLink link:definitionLink EX-101.INS 4 ck0000792953-20120731.xml INSTANCE DOCUMENT 485BPOS 2012-07-31 0000792953 2012-10-01 AMERICAN FUNDS TAX EXEMPT SERIES I false 2012-09-27 2012-10-01 <tt>The fund pays transaction costs, such as commissions, when it buys and sells <br />securities (or "turns over" its portfolio). A higher portfolio turnover rate <br />may indicate higher transaction costs and may result in higher taxes when fund <br />shares are held in a taxable account. These costs, which are not reflected in <br />annual fund operating expenses or in the example, affect the fund's investment <br />results. During the most recent fiscal year, the fund's portfolio turnover <br />rate was 9% of the average value of its portfolio.</tt> <div style="display:none">~ http://www.americanfunds.com/role/ExpenseExample_S000009405Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact * ~</div> <div style="display:none">~ http://www.americanfunds.com/role/BarChartData_S000009405Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact * ~</div> 800/325-3590 <tt>The fund's primary investment objective is to provide you with a high level of<br />current income exempt from regular federal and Virginia state income taxes.</tt> <tt>This example is intended to help you compare the cost of investing in<br />the fund with the cost of investing in other mutual funds.<br /> <br />The example assumes that you invest $10,000 in the fund for the time periods<br />indicated and then redeem all of your shares at the end of those periods. The<br />example also assumes that your investment has a 5% return each year and that <br />the fund's operating expenses remain the same.</tt> <tt>The fund seeks to achieve its objectives by primarily investing in municipal<br />bonds issued by the Commonwealth of Virginia and its agencies and<br />municipalities. Consistent with the fund's objectives, the fund may also invest<br />in municipal securities that are issued by jurisdictions outside Virginia.<br />Municipal bonds are debt obligations generally issued to obtain funds for<br />various public purposes, including the construction of public facilities. The<br />fund may also invest in bonds exempt from federal and state taxation that are<br />used to fund private projects.<br /> <br />Under normal circumstances, the fund will invest at least 80% of its assets in,<br />or derive at least 80% of its income from, securities that are exempt from both<br />regular federal and Virginia income taxes and that do not subject you to federal<br />alternative minimum tax. The fund may also invest up to 20% of its assets in<br />securities that may subject you to federal alternative minimum tax. The fund is<br />intended primarily for taxable residents of Virginia.<br /> <br />The fund will invest primarily in investment-grade debt securities rated BBB- <br />or better or Baa3 or better by Nationally Recognized Statistical Rating<br />Organizations designated by the fund's investment adviser, or unrated but<br />determined by the fund's investment adviser to be of equivalent quality. The<br />fund may also invest in lower quality, lower rated debt securities rated BB+ or<br />below and Ba1 or below by Nationally Recognized Statistical Rating Organizations<br />designated by the fund's investment adviser, or unrated but determined by the<br />fund's investment adviser to be of equivalent quality. Such securities are<br />sometimes referred to as "junk bonds." Some of the securities in which the fund<br />invests may have credit and liquidity support features, including guarantees and<br />letters of credit.<br /> <br />The investment adviser uses a system of multiple portfolio counselors in<br />managing the fund's assets. Under this approach, the portfolio of the fund is<br />divided into segments managed by individual counselors who decide how their<br />respective segments will be invested.<br /> <br />The fund relies on the professional judgment of its investment adviser to <br />make decisions about the fund's portfolio investments. The basic investment<br />philosophy of the investment adviser is to seek to invest in attractively <br />priced securities that, in its opinion, represent good, long-term investment<br />opportunities. The investment adviser believes that an important way to<br />accomplish this is by analyzing various factors, which may include the credit<br />strength of the issuer, prices of similar securities issued by comparable<br />issuers, anticipated changes in interest rates, general market conditions and<br />other factors pertinent to the particular security being evaluated. Securities<br />may be sold when the investment adviser believes that they no longer represent<br />relatively attractive investment opportunities.</tt> The Tax-Exempt Fund of Virginia® <tt>Its secondary objective is preservation of capital.</tt> 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. Example 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. Investment objectives Past investment results (before and after taxes) are not predictive of future investment results. The Lipper Virginia Municipal Debt Funds Average includes the fund and other funds that disclose investment objectives and/or strategies reasonably comparable to the fund's objective and/or strategies. You may lose money by investing in the fund. Principal risks Shareholder fees (fees paid directly from your investment) Although your actual costs may be higher or lower, based on these assumptions your costs would be: 0.09 Your actual after-tax returns depend on your individual tax situation and likely will differ from the results shown above. 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.) Results do not include a sales charge; if a sales charge were included, results would be lower. Investment results 100000 The following bar chart shows how the fund's investment results have varied from year to year, and the following table shows how the fund's average annual total returns for various periods compare with a broad measure of market results. <tt>Highest/Lowest quarterly results<br />during this period were:<br /><br />Highest 6.37% (quarter ended <br />September 30, 2009)<br /><br />Lowest -4.31% (quarter ended<br />December 31, 2010)<br /><br />The fund's total return for the<br />six months ended june 30, 2012,<br />was 3.18.</tt> Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment) Average annual total returns For the periods ended December 31, 2011 (with maximum sales charge): <tt>The following bar chart shows how the fund's investment results have varied from<br />year to year, and the following table shows how the fund's average annual total<br />returns for various periods compare with a broad measure of market results.</tt> Portfolio turnover <tt>This section describes the principal risks associated with the fund's principal<br />investment strategies. You may lose money by investing in the fund. The<br />likelihood of loss may be greater if you invest for a shorter period of time.<br /> <br />Risks of investing in municipal bonds issued in the state of Virginia -- Because<br />the fund invests primarily in securities of issuers in the state of Virginia,<br />the fund is more susceptible to factors adversely affecting issuers of the<br />state's securities than a comparable municipal bond mutual fund that does <br />not concentrate in a single state. Virginia is affected by changes in levels of<br />federal funding and financial support of certain industries, as well as by<br />federal spending cutbacks due to the large number of residents who are employed<br />by the federal government. In addition, the state is dependent on certain<br />economic sectors. Virginia's economy is largely dependent on the government<br />sector, manufacturing, the service trade and financial services. To the extent<br />there are changes to any of these sectors, the fund may be adversely impacted.<br /> <br />Market conditions -- The prices of, and the income generated by, the securities<br />held by the fund may decline due to market conditions and other factors,<br />including those directly involving the issuers of securities held by the fund.<br /> <br />Investing in bonds -- Rising interest rates will generally cause the prices of<br />bonds and other debt securities to fall. Longer maturity debt securities may be<br />subject to greater price fluctuations than shorter maturity debt securities. <br />In addition, falling interest rates may cause an issuer to redeem, call or<br />refinance a security before its stated maturity, which may result in the fund<br />having to reinvest the proceeds in lower yielding securities.<br /> <br />Bonds and other debt securities are subject to credit risk, which is the<br />possibility that the credit strength of an issuer will weaken and/or an issuer<br />of a debt security will fail to make timely payments of principal or interest<br />and the security will go into default.<br /> <br />Thinly traded securities -- There may be little trading in the secondary market<br />for particular bonds or other debt securities, which may make them more<br />difficult to value, acquire or sell.<br /> <br />Credit and liquidity support -- Changes in the credit quality of banks and<br />financial institutions providing credit and liquidity support features with<br />respect to securities held by the fund could cause the values of these<br />securities to decline.<br /> <br />Investing in lower rated bonds -- Lower rated bonds and other lower rated debt<br />securities generally have higher rates of interest and involve greater risk of<br />default or price declines due to changes in the issuer's creditworthiness than<br />those of higher quality debt securities. The market prices of these securities<br />may fluctuate more than the prices of higher quality debt securities and may<br />decline significantly in periods of general economic difficulty. These risks <br />may be increased with respect to investments in junk bonds.<br />&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;<br />Investing in similar municipal bonds -- Investing significantly in municipal<br />obligations of issuers in the same state or backed by revenues of similar <br />types of projects or industries may make the fund more susceptible to certain<br />economic, political or regulatory occurrences. As a result, the potential for<br />fluctuations in the fund's share price may increase.<br /> <br />Management -- The investment adviser to the fund actively manages the fund's<br />investments. Consequently, the fund is subject to the risk that the methods and<br />analyses employed by the investment adviser in this process may not produce the<br />desired results. This could cause the fund to lose value or its investment<br />results to lag relevant benchmarks or other funds with similar objectives.<br /> <br />Your investment in the fund is not a bank deposit and is not insured or<br />guaranteed by the Federal Deposit Insurance Corporation or any other<br />governmental agency, entity or person. You should consider how this fund <br />fits into your overall investment program.</tt> Fees and expenses of the fund After-tax returns are shown only for Class A shares; after-tax returns for other share classes will vary. Principal investment strategies americanfunds.com <tt>The following bar chart shows how the fund's investment results have varied from<br />year to year, and the following table shows how the fund's average annual total<br />returns for various periods compare with a broad measure of market results. This<br />information provides some indication of the risks of investing in the fund. The<br />Lipper Virginia Municipal Debt Funds Average includes the fund and other funds<br />that disclose investment objectives and/or strategies reasonably comparable to<br />the fund's objective and/or strategies. Past investment results (before and<br />after taxes) are not predictive of future investment results. Updated<br />information on the fund's investment results can be obtained by visiting<br />americanfunds.com.</tt> <tt>This table describes the fees and expenses that you may pay if you buy and hold<br />shares of the fund. You may qualify for sales charge discounts if you and your<br />family invest, or agree to invest in the future, at least $100,000 in American<br />Funds. More information about these and other discounts is available from your<br />financial professional and in the "Sales charge reductions and waivers" section<br />on page 34 of the prospectus and on page 57 of the fund's statement of<br />additional information.</tt> <div style="display:none">~ http://www.americanfunds.com/role/OperatingExpensesData_S000009405Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact * ~</div> For the share classes listed below, you would pay the following if you did not redeem your shares: <div style="display:none">~ http://www.americanfunds.com/role/PerformanceTableData_S000009405Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~</div> <tt>After-tax returns are shown only for Class A shares; after-tax returns for other<br />share classes will vary. After-tax returns are calculated using the highest<br />individual federal income tax rates in effect during each year of the periods<br />shown and do not reflect the impact of state and local taxes. Your actual<br />after-tax returns depend on your individual tax situation and likely will differ<br />from the results shown above.</tt> 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. <div style="display:none">~ http://www.americanfunds.com/role/ExpenseExampleNoRedemption_S000009405Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact * ~</div> <tt>Class A annualized 30-day yield at July 31, 2012: 1.69% (For current yield information, please call American FundsLine&#xAE; at 800/325-3590.)</tt> <div style="display:none">~ http://www.americanfunds.com/role/ShareholderFeesData_S000009405Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact * ~</div> Lipper Virginia Municipal Debt Funds Average (reflects no deductions for sales charges, account fees or taxes) 0.0949 0.0331 0.0433 0.0560 Barclays Virginia Municipal Index (reflects no deductions for sales charges, account fees, expenses or taxes) 0.0877 0.0521 0.0522 A - After taxes on distributions and sale of fund shares 0.0489 0.0348 0.0392 1986-08-14 A - After taxes on distributions 0.0562 0.0347 0.0397 1986-08-14 TEFFX 0.0000 F-2 - Before taxes 51 160 628 0.00 280 0.0989 0.0016 0.0034 0.00 0.0000 0.0050 0.0585 2008-08-01 0.0000 TEVFX 0.0000 F-1 - Before taxes 78 243 942 0.00 422 0.0959 0.0017 0.0034 0.0418 0.00 0.0025 0.0424 0.0076 0.0412 2001-04-04 0.0000 TEVCX 0.0000 C - Before taxes 248 148 459 1735 0.00 792 0.0784 0.0011 0.0034 1735 0.0345 459 792 0.00 0.0100 0.0352 0.0145 0.0357 2001-04-18 0.0100 TEVBX 0.0000 B - Before taxes 642 142 840 1469 0.00 961 0.0391 0.0005 0.0034 1469 0.0315 440 761 0.00 0.0100 0.0375 0.0139 0.0429 2000-03-15 0.0500 TFVAX 0.0892 Lowest Highest 0.0375 2012-06-30 A - Before taxes 440 2009-09-30 0.0169 578 -0.0431 0.0304 0.0191 1167 0.00 729 0.0180 0.0637 0.0562 0.0007 -0.0378 0.0034 2010-12-31 0.1255 0.0347 0.0231 total return 0.0971 0.00 0.0418 Class A annualized 30-day yield at July 31, 2012: 0.0025 0.0397 0.0066 0.0399 0.0542 1986-08-14 0.0318 0.0100 <tt>The fund pays transaction costs, such as commissions, when it buys and sells <br />securities (or "turns over" its portfolio). A higher portfolio turnover rate <br />may indicate higher transaction costs and may result in higher taxes when fund <br />shares are held in a taxable account. These costs, which are not reflected in <br />annual fund operating expenses or in the example, affect the fund's investment <br />results. During the most recent fiscal year, the fund's portfolio turnover <br />rate was 7% of the average value of its portfolio.</tt> <div style="display:none">~ http://www.americanfunds.com/role/ExpenseExample_S000009404Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact * ~</div> <div style="display:none">~ http://www.americanfunds.com/role/BarChartData_S000009404Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact * ~</div> 800/325-3590 <tt>The fund's primary investment objective is to provide you with a high level of<br />current income exempt from regular federal and Maryland state income taxes.</tt> <tt>This example is intended to help you compare the cost of investing in<br />the fund with the cost of investing in other mutual funds.<br /> <br />The example assumes that you invest $10,000 in the fund for the time periods<br />indicated and then redeem all of your shares at the end of those periods. The<br />example also assumes that your investment has a 5% return each year and that <br />the fund's operating expenses remain the same.</tt> <tt>The fund seeks to achieve its objectives by primarily investing in municipal<br />bonds issued by the state of Maryland and its agencies and municipalities.<br />Consistent with the fund's objectives, the fund may also invest in municipal<br />securities that are issued by jurisdictions outside Maryland. Municipal bonds<br />are debt obligations generally issued to obtain funds for various public<br />purposes, including the construction of public facilities. The fund may also<br />invest in bonds exempt from federal and state taxation that are used to fund<br />private projects.<br /> <br />Under normal circumstances, the fund will invest at least 80% of its assets in,<br />or derive at least 80% of its income from, securities that are exempt from both<br />regular federal and Maryland income taxes and that do not subject you to federal<br />alternative minimum tax. The fund may also invest up to 20% of its assets in<br />securities that may subject you to federal alternative minimum tax. The fund is<br />intended primarily for taxable residents of Maryland.<br /> <br />The fund will invest primarily in investment-grade debt securities rated BBB- <br />or better or Baa3 or better by Nationally Recognized Statistical Rating<br />Organizations designated by the fund's investment adviser, or unrated but<br />determined by the fund's investment adviser to be of equivalent quality. The<br />fund may also invest in lower quality, lower rated debt securities rated BB+ or<br />below and Ba1 or below by Nationally Recognized Statistical Rating Organizations<br />designated by the fund's investment adviser, or unrated but determined by the<br />fund's investment adviser to be of equivalent quality. Such securities are<br />sometimes referred to as "junk bonds." Some of the securities in which the fund<br />invests may have credit and liquidity support features, including guarantees and<br />letters of credit.<br /> <br />The investment adviser uses a system of multiple portfolio counselors in<br />managing the fund's assets. Under this approach, the portfolio of the fund is<br />divided into segments managed by individual counselors who decide how their<br />respective segments will be invested.<br /> <br />The fund relies on the professional judgment of its investment adviser to <br />make decisions about the fund's portfolio investments. The basic investment<br />philosophy of the investment adviser is to seek to invest in attractively <br />priced securities that, in its opinion, represent good, long-term investment<br />opportunities. The investment adviser believes that an important way to<br />accomplish this is by analyzing various factors, which may include the credit<br />strength of the issuer, prices of similar securities issued by comparable<br />issuers, anticipated changes in interest rates, general market conditions and<br />other factors pertinent to the particular security being evaluated. Securities<br />may be sold when the investment adviser believes that they no longer represent<br />relatively attractive investment opportunities.</tt> The Tax-Exempt Fund of Maryland® <tt>Its secondary objective is preservation of capital.</tt> 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. Example 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. Investment objectives Past investment results (before and after taxes) are not predictive of future investment results. The Lipper Maryland Municipal Debt Funds Average includes the fund and other funds that disclose investment objectives and/or strategies reasonably comparable to the fund's objective and/or strategies. You may lose money by investing in the fund. Principal risks Shareholder fees (fees paid directly from your investment) Although your actual costs may be higher or lower, based on these assumptions your costs would be: 0.07 Your actual after-tax returns depend on your individual tax situation and likely will differ from the results shown above. 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.) Results do not include a sales charge; if a sales charge were included, results would be lower. Investment results 100000 The following bar chart shows how the fund's investment results have varied from year to year, and the following table shows how the fund's average annual total returns for various periods compare with a broad measure of market results. <tt>Highest/Lowest quaterly results<br />during this period were:<br /><br />Highest 7.07% (quarter ended <br />September 30, 2009)<br /><br />Lowest -4.41% (quarter ended <br />December 31, 2008)<br /><br />The fund's total return for the<br />six months ended June 30, 2012,<br />was 3.26%</tt> Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment) Average annual total returns For the periods ended December 31, 2011 (with maximum sales charge): <tt>The following bar chart shows how the fund's investment results have varied from<br />year to year, and the following table shows how the fund's average annual total<br />returns for various periods compare with a broad measure of market results.</tt> Portfolio turnover <tt>This section describes the principal risks associated with the fund's principal<br />investment strategies. You may lose money by investing in the fund. The<br />likelihood of loss may be greater if you invest for a shorter period of time.<br /> <br />Risks of investing in municipal bonds issued in the state of Maryland -- Because<br />the fund invests primarily in securities of issuers in the state of Maryland,<br />the fund is more susceptible to factors adversely affecting issuers of the<br />state's securities than a comparable municipal bond mutual fund that does <br />not concentrate in a single state. Maryland is affected by changes in levels of<br />federal funding and financial support of certain industries, as well as by federal <br />spending cutbacks due to the large number of residents who are employed<br />by the federal government. In addition, the state is dependent on certain<br />economic sectors. Maryland's economy is largely dependent on the government<br />sector, manufacturing, the service trade, and financial, real estate and<br />insurance entities. To the extent there are changes to any of these sectors, <br />the fund may be adversely impacted.<br /> <br />Market conditions -- The prices of, and the income generated by, the securities<br />held by the fund may decline due to market conditions and other factors,<br />including those directly involving the issuers of securities held by the fund.<br /> <br />Investing in bonds -- Rising interest rates will generally cause the prices of<br />bonds and other debt securities to fall. Longer maturity debt securities may be<br />subject to greater price fluctuations than shorter maturity debt securities. In<br />addition, falling interest rates may cause an issuer to redeem, call or<br />refinance a security before its stated maturity, which may result in the fund<br />having to reinvest the proceeds in lower yielding securities.<br /> <br />Bonds and other debt securities are subject to credit risk, which is the<br />possibility that the credit strength of an issuer will weaken and/or an issuer<br />of a debt security will fail to make timely payments of principal or interest<br />and the security will go into default.<br /> <br />Thinly traded securities -- There may be little trading in the secondary market<br />for particular bonds or other debt securities, which may make them more<br />difficult to value, acquire or sell.<br /> <br />Credit and liquidity support -- Changes in the credit quality of banks and<br />financial institutions providing credit and liquidity support features with<br />respect to securities held by the fund could cause the values of these<br />securities to decline.<br /> <br />Investing in lower rated bonds -- Lower rated bonds and other lower rated debt<br />securities generally have higher rates of interest and involve greater risk of<br />default or price declines due to changes in the issuer's creditworthiness than<br />those of higher quality debt securities. The market prices of these securities<br />may fluctuate more than the prices of higher quality debt securities and may<br />decline significantly in periods of general economic difficulty. These risks may<br />be increased with respect to investments in junk bonds.<br />&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;<br />Investing in similar municipal bonds -- Investing significantly in municipal<br />obligations of issuers in the same state or backed by revenues of similar types<br />of projects or industries may make the fund more susceptible to certain<br />economic, political or regulatory occurrences. As a result, the potential for<br />fluctuations in the fund's share price may increase.<br /> <br />Management -- The investment adviser to the fund actively manages the fund's<br />investments. Consequently, the fund is subject to the risk that the methods and<br />analyses employed by the investment adviser in this process may not produce the<br />desired results. This could cause the fund to lose value or its investment<br />results to lag relevant benchmarks or other funds with similar objectives.<br /> <br />Your investment in the fund is not a bank deposit and is not insured or<br />guaranteed by the Federal Deposit Insurance Corporation or any other<br />governmental agency, entity or person. You should consider how this <br />fund fits into your overall investment program.</tt> Fees and expenses of the fund After-tax returns are shown only for Class A shares; after-tax returns for other share classes will vary. Principal investment strategies americanfunds.com <tt>The following bar chart shows how the fund's investment results have varied from<br />year to year, and the following table shows how the fund's average annual total<br />returns for various periods compare with a broad measure of market results. This<br />information provides some indication of the risks of investing in the fund. The<br />Lipper Maryland Municipal Debt Funds Average includes the fund and other funds<br />that disclose investment objectives and/or strategies reasonably comparable to<br />the fund's objective and/or strategies. Past investment results (before and<br />after taxes) are not predictive of future investment results. Updated<br />information on the fund's investment results can be obtained by visiting<br />americanfunds.com.</tt> <tt>This table describes the fees and expenses that you may pay if you buy and hold<br />shares of the fund. You may qualify for sales charge discounts if you and your<br />family invest, or agree to invest in the future, at least $100,000 in American<br />Funds. More information about these and other discounts is available from your<br />financial professional and in the "Sales charge reductions and waivers" section<br />on page 34 of the prospectus and on page 57 of the fund's statement of<br />additional information.</tt> <div style="display:none">~ http://www.americanfunds.com/role/OperatingExpensesData_S000009404Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact * ~</div> For the share classes listed below, you would pay the following if you did not redeem your shares: <div style="display:none">~ http://www.americanfunds.com/role/PerformanceTableData_S000009404Member column dei_LegalEntityAxis compact * column rr_PerformanceMeasureAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact * ~</div> <tt>After-tax returns are shown only for Class A shares; after-tax returns for other<br />share classes will vary. After-tax returns are calculated using the highest<br />individual federal income tax rates in effect during each year of the periods<br />shown and do not reflect the impact of state and local taxes. Your actual<br />after-tax returns depend on your individual tax situation and likely will differ<br />from the results shown above.</tt> 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. <div style="display:none">~ http://www.americanfunds.com/role/ExpenseExampleNoRedemption_S000009404Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact * ~</div> <tt>Class A annualized 30-day yield at July 31, 2012: 1.85% (For current yield information, please call American FundsLine&#xAE; at 800/325-3590.)</tt> <div style="display:none">~ http://www.americanfunds.com/role/ShareholderFeesData_S000009404Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact * ~</div> Lipper Maryland Municipal Debt Funds Average (reflects no deductions for sales charges, account fees or taxes) 0.0941 0.0368 0.0433 0.0547 Barclays Maryland Municipal Index (reflects no deductions for sales charges, account fees, expenses or taxes) 0.0875 0.0533 0.0511 A - After taxes on distributions and sale of fund shares 0.0483 0.0314 0.0389 1986-08-14 A - After taxes on distributions 0.0554 0.0307 0.0391 1986-08-14 TMMFX 0.0000 F-2 - Before taxes 50 157 616 0.00 274 0.0984 0.0015 0.0034 0.00 0.0000 0.0049 0.0573 2008-08-01 0.0000 TMDFX 0.0000 F-1 - Before taxes 78 243 942 0.00 422 0.0951 0.0017 0.0034 0.0377 0.00 0.0025 0.0419 0.0076 0.0412 2001-06-15 0.0000 TEMCX 0.0000 C - Before taxes 249 149 462 1746 0.00 797 0.0777 0.0012 0.0034 1746 0.0305 462 797 0.00 0.0100 0.0346 0.0146 0.0352 2001-04-12 0.0100 TEMBX 0.0000 B - Before taxes 643 143 843 1480 0.00 966 0.0383 0.0006 0.0034 1480 0.0274 443 766 0.00 0.0100 0.0369 0.0140 0.0414 2000-03-15 0.0500 TMMDX 0.0831 Lowest Highest 0.0375 2012-06-30 A - Before taxes 441 2009-09-30 0.0185 581 -0.0441 0.0393 0.0236 1178 0.00 734 0.0065 0.0707 0.0554 0.0008 -0.0755 0.0034 2008-12-31 0.1576 0.0307 0.03 total return 0.0963 0.00 0.0466 Class A annualized 30-day yield at July 31, 2012: 0.0025 0.0391 0.0067 0.0395 0.0525 1986-08-14 0.0326 0.0100 0000792953 ck0000792953:SummaryS000009404Memberck0000792953:S000009404Memberck0000792953:C000025748Member 2012-10-01 2012-10-01 0000792953 ck0000792953:SummaryS000009404Memberck0000792953:S000009404Memberck0000792953:C000025749Member 2012-10-01 2012-10-01 0000792953 ck0000792953:SummaryS000009404Memberck0000792953:S000009404Memberck0000792953:C000025750Member 2012-10-01 2012-10-01 0000792953 ck0000792953:SummaryS000009404Memberck0000792953:S000009404Memberck0000792953:C000025751Member 2012-10-01 2012-10-01 0000792953 ck0000792953:SummaryS000009404Memberck0000792953:S000009404Memberck0000792953:C000068518Member 2012-10-01 2012-10-01 0000792953 ck0000792953:SummaryS000009404Memberck0000792953:S000009404Memberrr:AfterTaxesOnDistributionsMemberck0000792953:C000025748Member 2012-10-01 2012-10-01 0000792953 ck0000792953:SummaryS000009404Memberck0000792953:S000009404Memberrr:AfterTaxesOnDistributionsAndSalesMemberck0000792953:C000025748Member 2012-10-01 2012-10-01 0000792953 ck0000792953:SummaryS000009404Memberck0000792953:S000009404Memberck0000792953:RRINDEX00001Member 2012-10-01 2012-10-01 0000792953 ck0000792953:SummaryS000009404Memberck0000792953:S000009404Memberck0000792953:RRINDEX00002Member 2012-10-01 2012-10-01 0000792953 ck0000792953:SummaryS000009404Memberck0000792953:S000009404Member 2012-10-01 2012-10-01 0000792953 ck0000792953:SummaryS000009405Memberck0000792953:S000009405Memberck0000792953:C000025753Member 2012-10-01 2012-10-01 0000792953 ck0000792953:SummaryS000009405Memberck0000792953:S000009405Memberck0000792953:C000025754Member 2012-10-01 2012-10-01 0000792953 ck0000792953:SummaryS000009405Memberck0000792953:S000009405Memberck0000792953:C000025755Member 2012-10-01 2012-10-01 0000792953 ck0000792953:SummaryS000009405Memberck0000792953:S000009405Memberck0000792953:C000025756Member 2012-10-01 2012-10-01 0000792953 ck0000792953:SummaryS000009405Memberck0000792953:S000009405Memberck0000792953:C000068519Member 2012-10-01 2012-10-01 0000792953 ck0000792953:SummaryS000009405Memberck0000792953:S000009405Memberrr:AfterTaxesOnDistributionsMemberck0000792953:C000025753Member 2012-10-01 2012-10-01 0000792953 ck0000792953:SummaryS000009405Memberck0000792953:S000009405Memberrr:AfterTaxesOnDistributionsAndSalesMemberck0000792953:C000025753Member 2012-10-01 2012-10-01 0000792953 ck0000792953:SummaryS000009405Memberck0000792953:S000009405Memberck0000792953:RRINDEX00003Member 2012-10-01 2012-10-01 0000792953 ck0000792953:SummaryS000009405Memberck0000792953:S000009405Memberck0000792953:RRINDEX00004Member 2012-10-01 2012-10-01 0000792953 ck0000792953:SummaryS000009405Memberck0000792953:S000009405Member 2012-10-01 2012-10-01 0000792953 2012-10-01 2012-10-01 pure iso4217:USD 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. 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Label Element Value
Risk Return [Abstract] rr_RiskReturnAbstract  
ProspectusDate rr_ProspectusDate Oct. 01, 2012
The Tax-Exempt Fund of Maryland (Prospectus Summary) | The Tax-Exempt Fund of Maryland
 
Risk Return [Abstract] rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading The Tax-Exempt Fund of Maryland®
Objective [Heading] rr_ObjectiveHeading Investment objectives
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock The fund's primary investment objective is to provide you with a high level of
current income exempt from regular federal and Maryland state income taxes.
Objective, Secondary [Text Block] rr_ObjectiveSecondaryTextBlock Its secondary objective is preservation of capital.
Expense [Heading] rr_ExpenseHeading Fees and expenses of the fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock This table describes the fees and expenses that you may pay if you buy and hold
shares of the fund. You may qualify for sales charge discounts if you and your
family invest, or agree to invest in the future, at least $100,000 in American
Funds. More information about these and other discounts is available from your
financial professional and in the "Sales charge reductions and waivers" section
on page 34 of the prospectus and on page 57 of the fund's statement of
additional information.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock The fund pays transaction costs, such as commissions, when it buys and sells
securities (or "turns over" its portfolio). A higher portfolio turnover rate
may indicate higher transaction costs and may result in higher taxes when fund
shares are held in a taxable account. These costs, which are not reflected in
annual fund operating expenses or in the example, affect the fund's investment
results. During the most recent fiscal year, the fund's portfolio turnover
rate was 7% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 7.00%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts 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.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount 100,000
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock This example is intended to help you compare the cost of investing in
the fund with the cost of investing in other mutual funds.

The example assumes that you invest $10,000 in the fund for the time periods
indicated and then redeem all of your shares at the end of those periods. The
example also assumes that your investment has a 5% return each year and that
the fund's operating expenses remain the same.
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption For the share classes listed below, you would pay the following if you did not redeem your shares:
Strategy [Heading] rr_StrategyHeading Principal investment strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock The fund seeks to achieve its objectives by primarily investing in municipal
bonds issued by the state of Maryland and its agencies and municipalities.
Consistent with the fund's objectives, the fund may also invest in municipal
securities that are issued by jurisdictions outside Maryland. Municipal bonds
are debt obligations generally issued to obtain funds for various public
purposes, including the construction of public facilities. The fund may also
invest in bonds exempt from federal and state taxation that are used to fund
private projects.

Under normal circumstances, the fund will invest at least 80% of its assets in,
or derive at least 80% of its income from, securities that are exempt from both
regular federal and Maryland income taxes and that do not subject you to federal
alternative minimum tax. The fund may also invest up to 20% of its assets in
securities that may subject you to federal alternative minimum tax. The fund is
intended primarily for taxable residents of Maryland.

The fund will invest primarily in investment-grade debt securities rated BBB-
or better or Baa3 or better by Nationally Recognized Statistical Rating
Organizations designated by the fund's investment adviser, or unrated but
determined by the fund's investment adviser to be of equivalent quality. The
fund may also invest in lower quality, lower rated debt securities rated BB+ or
below and Ba1 or below by Nationally Recognized Statistical Rating Organizations
designated by the fund's investment adviser, or unrated but determined by the
fund's investment adviser to be of equivalent quality. Such securities are
sometimes referred to as "junk bonds." Some of the securities in which the fund
invests may have credit and liquidity support features, including guarantees and
letters of credit.

The investment adviser uses a system of multiple portfolio counselors in
managing the fund's assets. Under this approach, the portfolio of the fund is
divided into segments managed by individual counselors who decide how their
respective segments will be invested.

The fund relies on the professional judgment of its investment adviser to
make decisions about the fund's portfolio investments. The basic investment
philosophy of the investment adviser is to seek to invest in attractively
priced securities that, in its opinion, represent good, long-term investment
opportunities. The investment adviser believes that an important way to
accomplish this is by analyzing various factors, which may include the credit
strength of the issuer, prices of similar securities issued by comparable
issuers, anticipated changes in interest rates, general market conditions and
other factors pertinent to the particular security being evaluated. Securities
may be sold when the investment adviser believes that they no longer represent
relatively attractive investment opportunities.
Risk [Heading] rr_RiskHeading Principal risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock This section describes the principal risks associated with the fund's principal
investment strategies. You may lose money by investing in the fund. The
likelihood of loss may be greater if you invest for a shorter period of time.

Risks of investing in municipal bonds issued in the state of Maryland -- Because
the fund invests primarily in securities of issuers in the state of Maryland,
the fund is more susceptible to factors adversely affecting issuers of the
state's securities than a comparable municipal bond mutual fund that does
not concentrate in a single state. Maryland is affected by changes in levels of
federal funding and financial support of certain industries, as well as by federal
spending cutbacks due to the large number of residents who are employed
by the federal government. In addition, the state is dependent on certain
economic sectors. Maryland's economy is largely dependent on the government
sector, manufacturing, the service trade, and financial, real estate and
insurance entities. To the extent there are changes to any of these sectors,
the fund may be adversely impacted.

Market conditions -- The prices of, and the income generated by, the securities
held by the fund may decline due to market conditions and other factors,
including those directly involving the issuers of securities held by the fund.

Investing in bonds -- Rising interest rates will generally cause the prices of
bonds and other debt securities to fall. Longer maturity debt securities may be
subject to greater price fluctuations than shorter maturity debt securities. In
addition, falling interest rates may cause an issuer to redeem, call or
refinance a security before its stated maturity, which may result in the fund
having to reinvest the proceeds in lower yielding securities.

Bonds and other debt securities are subject to credit risk, which is the
possibility that the credit strength of an issuer will weaken and/or an issuer
of a debt security will fail to make timely payments of principal or interest
and the security will go into default.

Thinly traded securities -- There may be little trading in the secondary market
for particular bonds or other debt securities, which may make them more
difficult to value, acquire or sell.

Credit and liquidity support -- Changes in the credit quality of banks and
financial institutions providing credit and liquidity support features with
respect to securities held by the fund could cause the values of these
securities to decline.

Investing in lower rated bonds -- Lower rated bonds and other lower rated debt
securities generally have higher rates of interest and involve greater risk of
default or price declines due to changes in the issuer's creditworthiness than
those of higher quality debt securities. The market prices of these securities
may fluctuate more than the prices of higher quality debt securities and may
decline significantly in periods of general economic difficulty. These risks may
be increased with respect to investments in junk bonds.
                                                                                 
Investing in similar municipal bonds -- Investing significantly in municipal
obligations of issuers in the same state or backed by revenues of similar types
of projects or industries may make the fund more susceptible to certain
economic, political or regulatory occurrences. As a result, the potential for
fluctuations in the fund's share price may increase.

Management -- The investment adviser to the fund actively manages the fund's
investments. Consequently, the fund is subject to the risk that the methods and
analyses employed by the investment adviser in this process may not produce the
desired results. This could cause the fund to lose value or its investment
results to lag relevant benchmarks or other funds with similar objectives.

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. You should consider how this
fund fits into your overall investment program.
Risk Lose Money [Text] rr_RiskLoseMoney You may lose money by investing in the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution 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.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Investment results
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The following bar chart shows how the fund's investment results have varied from
year to year, and the following table shows how the fund's average annual total
returns for various periods compare with a broad measure of market results. This
information provides some indication of the risks of investing in the fund. The
Lipper Maryland Municipal Debt Funds Average includes the fund and other funds
that disclose investment objectives and/or strategies reasonably comparable to
the fund's objective and/or strategies. Past investment results (before and
after taxes) are not predictive of future investment results. Updated
information on the fund's investment results can be obtained by visiting
americanfunds.com.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart shows how the fund's investment results have varied from year to year, and the following table shows how the fund's average annual total returns for various periods compare with a broad measure of market results.
Performance Additional Market Index [Text] rr_PerformanceAdditionalMarketIndex The Lipper Maryland Municipal Debt Funds Average includes the fund and other funds that disclose investment objectives and/or strategies reasonably comparable to the fund's objective and/or strategies.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress americanfunds.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past investment results (before and after taxes) are not predictive of future investment results.
Bar Chart [Heading] rr_BarChartHeading 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.)
Bar Chart Narrative [Text Block] rr_BarChartNarrativeTextBlock The following bar chart shows how the fund's investment results have varied from
year to year, and the following table shows how the fund's average annual total
returns for various periods compare with a broad measure of market results.
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Results do not include a sales charge; if a sales charge were included, results would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Highest/Lowest quaterly results
during this period were:

Highest 7.07% (quarter ended
September 30, 2009)

Lowest -4.41% (quarter ended
December 31, 2008)

The fund's total return for the
six months ended June 30, 2012,
was 3.26%
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate 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.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Your actual after-tax returns depend on your individual tax situation and likely will differ from the results shown above.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown only for Class A shares; after-tax returns for other share classes will vary.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock After-tax returns are shown only for Class A shares; after-tax returns for other
share classes will vary. 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. Your actual
after-tax returns depend on your individual tax situation and likely will differ
from the results shown above.
Performance Table Footnotes rr_PerformanceTableFootnotesTextBlock Class A annualized 30-day yield at July 31, 2012: 1.85% (For current yield information, please call American FundsLine® at 800/325-3590.)
Caption rr_AverageAnnualReturnCaption Average annual total returns For the periods ended December 31, 2011 (with maximum sales charge):
Thirty Day Yield Phone rr_ThirtyDayYieldPhone 800/325-3590
The Tax-Exempt Fund of Maryland (Prospectus Summary) | The Tax-Exempt Fund of Maryland | Barclays Maryland Municipal Index
 
Risk Return [Abstract] rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Barclays Maryland Municipal Index (reflects no deductions for sales charges, account fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 8.75%
5 Years rr_AverageAnnualReturnYear05 5.33%
10 Years rr_AverageAnnualReturnYear10 5.11%
Since Inception rr_AverageAnnualReturnSinceInception   
The Tax-Exempt Fund of Maryland (Prospectus Summary) | The Tax-Exempt Fund of Maryland | Lipper Maryland Municipal Debt Funds Average
 
Risk Return [Abstract] rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Lipper Maryland Municipal Debt Funds Average (reflects no deductions for sales charges, account fees or taxes)
1 Year rr_AverageAnnualReturnYear01 9.41%
5 Years rr_AverageAnnualReturnYear05 3.68%
10 Years rr_AverageAnnualReturnYear10 4.33%
Since Inception rr_AverageAnnualReturnSinceInception 5.47%
The Tax-Exempt Fund of Maryland (Prospectus Summary) | The Tax-Exempt Fund of Maryland | Class A
 
Risk Return [Abstract] rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 3.75%
Maximum deferred sales charge (load) (as a percentage of the amount redeemed) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00% [1]
Maximum sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption or exchange fees rr_RedemptionFeeOverRedemption none
Management fees rr_ManagementFeesOverAssets 0.34%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.08%
Total annual fund operating expenses rr_ExpensesOverAssets 0.67%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 441
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 581
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 734
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,178
Annual Return 2002 rr_AnnualReturn2002 8.31%
Annual Return 2003 rr_AnnualReturn2003 4.66%
Annual Return 2004 rr_AnnualReturn2004 3.93%
Annual Return 2005 rr_AnnualReturn2005 3.00%
Annual Return 2006 rr_AnnualReturn2006 3.95%
Annual Return 2007 rr_AnnualReturn2007 0.65%
Annual Return 2008 rr_AnnualReturn2008 (7.55%)
Annual Return 2009 rr_AnnualReturn2009 15.76%
Annual Return 2010 rr_AnnualReturn2010 2.36%
Annual Return 2011 rr_AnnualReturn2011 9.63%
Year to Date Return, Label rr_YearToDateReturnLabel total return
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Jun. 30, 2012
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 3.26%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 7.07%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (4.41%)
Label rr_AverageAnnualReturnLabel A - Before taxes
1 Year rr_AverageAnnualReturnYear01 5.54%
5 Years rr_AverageAnnualReturnYear05 3.07%
10 Years rr_AverageAnnualReturnYear10 3.91%
Since Inception rr_AverageAnnualReturnSinceInception 5.25%
Inception Date rr_AverageAnnualReturnInceptionDate Aug. 14, 1986
Thirty Day Yield Caption rr_ThirtyDayYieldCaption Class A annualized 30-day yield at July 31, 2012:
Thirty Day Yield rr_ThirtyDayYield 1.85%
The Tax-Exempt Fund of Maryland (Prospectus Summary) | The Tax-Exempt Fund of Maryland | Class A | After Taxes on Distributions
 
Risk Return [Abstract] rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel A - After taxes on distributions
1 Year rr_AverageAnnualReturnYear01 5.54%
5 Years rr_AverageAnnualReturnYear05 3.07%
10 Years rr_AverageAnnualReturnYear10 3.91%
Since Inception rr_AverageAnnualReturnSinceInception   
Inception Date rr_AverageAnnualReturnInceptionDate Aug. 14, 1986
The Tax-Exempt Fund of Maryland (Prospectus Summary) | The Tax-Exempt Fund of Maryland | Class A | After Taxes on Distributions and Sales
 
Risk Return [Abstract] rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel A - After taxes on distributions and sale of fund shares
1 Year rr_AverageAnnualReturnYear01 4.83%
5 Years rr_AverageAnnualReturnYear05 3.14%
10 Years rr_AverageAnnualReturnYear10 3.89%
Since Inception rr_AverageAnnualReturnSinceInception   
Inception Date rr_AverageAnnualReturnInceptionDate Aug. 14, 1986
The Tax-Exempt Fund of Maryland (Prospectus Summary) | The Tax-Exempt Fund of Maryland | Class B
 
Risk Return [Abstract] rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of the amount redeemed) rr_MaximumDeferredSalesChargeOverOfferingPrice 5.00%
Maximum sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption or exchange fees rr_RedemptionFeeOverRedemption none
Management fees rr_ManagementFeesOverAssets 0.34%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other expenses rr_OtherExpensesOverAssets 0.06%
Total annual fund operating expenses rr_ExpensesOverAssets 1.40%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 643
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 843
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 966
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,480
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 143
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 443
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 766
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 1,480
Label rr_AverageAnnualReturnLabel B - Before taxes
1 Year rr_AverageAnnualReturnYear01 3.83%
5 Years rr_AverageAnnualReturnYear05 2.74%
10 Years rr_AverageAnnualReturnYear10 3.69%
Since Inception rr_AverageAnnualReturnSinceInception 4.14%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 15, 2000
The Tax-Exempt Fund of Maryland (Prospectus Summary) | The Tax-Exempt Fund of Maryland | Class C
 
Risk Return [Abstract] rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of the amount redeemed) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Maximum sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption or exchange fees rr_RedemptionFeeOverRedemption none
Management fees rr_ManagementFeesOverAssets 0.34%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other expenses rr_OtherExpensesOverAssets 0.12%
Total annual fund operating expenses rr_ExpensesOverAssets 1.46%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 249
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 462
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 797
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,746
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 149
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 462
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 797
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 1,746
Label rr_AverageAnnualReturnLabel C - Before taxes
1 Year rr_AverageAnnualReturnYear01 7.77%
5 Years rr_AverageAnnualReturnYear05 3.05%
10 Years rr_AverageAnnualReturnYear10 3.46%
Since Inception rr_AverageAnnualReturnSinceInception 3.52%
Inception Date rr_AverageAnnualReturnInceptionDate Apr. 12, 2001
The Tax-Exempt Fund of Maryland (Prospectus Summary) | The Tax-Exempt Fund of Maryland | Class F-1
 
Risk Return [Abstract] rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of the amount redeemed) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Maximum sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption or exchange fees rr_RedemptionFeeOverRedemption none
Management fees rr_ManagementFeesOverAssets 0.34%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.17%
Total annual fund operating expenses rr_ExpensesOverAssets 0.76%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 78
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 243
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 422
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 942
Label rr_AverageAnnualReturnLabel F-1 - Before taxes
1 Year rr_AverageAnnualReturnYear01 9.51%
5 Years rr_AverageAnnualReturnYear05 3.77%
10 Years rr_AverageAnnualReturnYear10 4.19%
Since Inception rr_AverageAnnualReturnSinceInception 4.12%
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 15, 2001
The Tax-Exempt Fund of Maryland (Prospectus Summary) | The Tax-Exempt Fund of Maryland | Class F-2
 
Risk Return [Abstract] rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of the amount redeemed) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Maximum sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption or exchange fees rr_RedemptionFeeOverRedemption none
Management fees rr_ManagementFeesOverAssets 0.34%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.15%
Total annual fund operating expenses rr_ExpensesOverAssets 0.49%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 50
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 157
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 274
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 616
Label rr_AverageAnnualReturnLabel F-2 - Before taxes
1 Year rr_AverageAnnualReturnYear01 9.84%
5 Years rr_AverageAnnualReturnYear05   
10 Years rr_AverageAnnualReturnYear10   
Since Inception rr_AverageAnnualReturnSinceInception 5.73%
Inception Date rr_AverageAnnualReturnInceptionDate Aug. 01, 2008
[1] 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.