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Risk/Return: rr_RiskReturnAbstract  
ProspectusDate rr_ProspectusDate Jul. 29, 2011
GNMA Securities (Prospectus Summary) | GNMA Securities
  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return, Heading rr_RiskReturnHeading GNMA Fund
Investment Objective, Heading rr_ObjectiveHeading Investment Goal
investment Objective, Primary rr_ObjectivePrimaryTextBlock 
The investment goal of the SunAmerica GNMA Fund (the "GNMA Fund" or the "Fund")
is current income, with capital appreciation as a secondary objective.
Expense, Heading rr_ExpenseHeading Fees and Expenses of the Fund
Expense, Narrative 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 the
SunAmerica fund complex. More information about these and other discounts is
available from your financial professional and in the "Shareholder Account
Information-Sales Charge Reductions and Waivers" section on page 27 of the
Fund's Prospectus and in the "Additional Information Regarding Purchase of
Shares" section on page 87 of the Fund's statement of additional information.
Shareholder Fees, Caption rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses, Caption 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 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 shares are
held in a taxable account. These costs, which are not reflected in annual fund
operating expenses or in the example, affect the Fund's performance. During the
most recent fiscal year, the Fund's portfolio turnover rate was 148% of the
average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 148.00%
Expense Breakpoint, Discounts 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 the SunAmerica fund complex.
Expense Breakpoint, Minimum Investment Required Amount rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 100,000
Expense Example, Heading rr_ExpenseExampleHeading EXAMPLE:
Expense Example, Narrative 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. Although your actual costs may be higher or lower, based on
these assumptions and the net expenses shown in the fee table, your costs would
be:
Expense Example, No Redemption, By Year, Caption rr_ExpenseExampleNoRedemptionByYearCaption You would pay the following expenses if you did not redeem your shares:
Investment Strategy, Heading rr_StrategyHeading Principal Investment Strategy and Techniques of the Fund
Investment Strategy, Narrative rr_StrategyNarrativeTextBlock 
The Fund's principal investment strategy is fixed income investing. The
strategy of "fixed income investing" in which the Fund engages includes
utilizing economic research and analysis of current economic conditions,
potential fluctuations in interest rates, and, where relevant, the strength
of the underlying issuer.

The principal investment technique of the Fund is active trading of
mortgage-backed securities issued or guaranteed by the Government National
Mortgage Association (GNMA) without regard to the maturities of such securities.
Under normal market conditions, at least 80% of the Fund's net assets plus any
borrowing for investment purposes will be invested in such securities. The Fund
may also invest in other types of U.S. Government securities.

The GNMA is a government owned corporation and a federal agency which issues
mortgage backed securities that represent an interest in a pool or pools of
mortgages. The Fund may purchase certain securities issued by GNMA known as
pass-through certificates. GNMA guarantees the full and timely payment of all
interest and principal by GNMA and such guarantee is backed by the full faith
and credit of the U.S. government.

The principal investment strategy and principal investment techniques of the
Fund may be changed without shareholder approval. You will receive at least
sixty (60) days' notice of any change to the 80% investment policy set forth
above.
Risk, Heading rr_RiskHeading Principal Risks of Investing in the Fund
Risk, Narrative rr_RiskNarrativeTextBlock 
There can be no assurance that the Fund's investment goals will be met or that
the net return on an investment in the Fund will exceed what could have been
obtained through other investment or savings vehicles. Shares of the Fund are
not bank deposits and are not guaranteed or insured by any bank, government
entity or the Federal Deposit Insurance Corporation. As with any mutual fund,
there is no guarantee that the Fund will be able to achieve its investment
goals. If the value of the assets of the Fund goes down, you could lose money.

The following is a summary description of the principal risks of investing in
the Fund.

Interest Rate Fluctuations. Interest rates and bond prices typically move
inversely to each other. Thus, as interest rates rise, bond prices typically
fall and as interest rates fall, bond prices typically rise. Longer-term and
lower coupon bonds tend to be more sensitive to changes in interest rates.

Bond Market Volatility. The bond markets as a whole could go up or down
(sometimes dramatically). This could affect the value of the securities in the
Fund's portfolio.

Prepayment Risk. The Fund will invest significantly in mortgage-backed
securities, which entails the risk that the underlying principal may be
"prepaid" at any time. As a general rule, prepayments increase during a period
of falling interest rates and decrease during a period of rising interest rates.
As a result of prepayments, in periods of declining interest rates, the Fund may
be required to reinvest its assets in securities with lower interest rates. In
periods of increasing interest rates, prepayments generally may decline, with
the effect that the securities subject to prepayment risk held by the Fund may
exhibit price characteristics of longer-term debt securities. Generally,
long-term bonds are more interest-rate sensitive.

Active Trading. As part of the Fund's principal investment technique, the Fund
may engage in active trading of its portfolio securities. Because the Fund may
sell a security without regard to how long it has held the security, active
trading may have tax consequences for certain shareholders, involving a possible
increase in short-term capital gains or losses. Active trading may result in
high portfolio turnover and correspondingly greater brokerage commissions and
other transaction costs, which will be borne directly by the Fund and which will
affect the Fund's performance. During periods of increased market volatility,
active trading may be more pronounced.

Securities Selection. A strategy used by the Fund, or securities selected by a
portfolio manager, may fail to produce the intended return.
Risk, Lose Money rr_RiskLoseMoney As with any mutual fund, there is no guarantee that the Fund will be able to achieve its investment goals. If the value of the assets of the Fund goes down, you could lose money.
Risk, Not Insured Depository Institution rr_RiskNotInsuredDepositoryInstitution Shares of the Fund are not bank deposits and are not guaranteed or insured by any bank, government entity or the Federal Deposit Insurance Corporation.
Bar Chart and Performance Table, Heading rr_BarChartAndPerformanceTableHeading Performance Information
Performance, Narrative rr_PerformanceNarrativeTextBlock 
The following Risk/Return Bar Chart and Table illustrates the risks of investing
in the Fund by showing changes in the Fund's performance from calendar year to
calendar year, and compares the Fund's average annual returns, before and after
taxes, to those of the BofA Merrill Lynch Mortgages GNMA Master Index*, a broad
measure of market performance. Sales charges are not reflected in the Bar Chart.
If these amounts were reflected, returns would be less than those shown. However,
the table includes all applicable fees and sales charges. Of course,past performance
(before and after taxes) is not necessarily an indication of how the Fund will
perform in the future. Updated information on the Fund's performance can be obtained
by visiting www.sunamericafunds.com or can be obtained by phone at 800-858-8850 ext.
6003.
Performance, Information Illustrates Variability of Returns rr_PerformanceInformationIllustratesVariabilityOfReturns The following Risk/Return Bar Chart and Table illustrates the risks of investing in the Fund by showing changes in the Fund's performance from calendar year to calendar year, and compares the Fund's average annual returns, before and after taxes, to those of the BofA Merrill Lynch Mortgages GNMA Master Index*, a broad measure of market performance.
Performance, Availability Phone Number rr_PerformanceAvailabilityPhone 800-858-8850 ext. 6003
Performance, Availability Website Address rr_PerformanceAvailabilityWebSiteAddress www.sunamericafunds.com
Performance, Past Does Not Indicate Future rr_PerformancePastDoesNotIndicateFuture past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.
Bar Chart, Heading rr_BarChartHeading GNMA FUND (CLASS A)
Bar Chart, Narrative rr_BarChartNarrativeTextBlock 
The following Risk/Return Bar Chart and Table illustrates the risks of investing
in the Fund by showing changes in the Fund's performance from calendar year to
calendar year, and compares the Fund's average annual returns, before and after
taxes, to those of the BofA Merrill Lynch Mortgages GNMA Master Index*, a broad
measure of market performance.
Bar Chart, Does Not Reflect Sales Loads rr_BarChartDoesNotReflectSalesLoads Sales charges are not reflected in the Bar Chart. If these amounts were reflected, returns would be less than those shown.
Bar Chart, Closing rr_BarChartClosingTextBlock 
During the 10-year period shown in the Bar Chart, the highest return for a
quarter was 5.67% (quarter ended September 30, 2001) and the lowest return
for a quarter was -2.15% (quarter ended June 30, 2004).

The Fund's cumulative year-to-date return through the most recent calendar
quarter ended June 30, 2011 was 2.89%.
Performance Table, Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate The after-tax returns shown were calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.
Performance Table, Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred An investor's actual after-tax returns depend on the investor's tax situation and may differ from those shown in the above table. The after-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
Performance Table, One Class of after Tax Shown rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown only for Class A. After-tax returns for other classes will vary.
Performance Table, Narrative rr_PerformanceTableNarrativeTextBlock 
The after-tax returns shown were calculated using the historical highest
individual federal marginal income tax rates, and do not reflect the impact of
state and local taxes. An investor's actual after-tax returns depend on the
investor's tax situation and may differ from those shown in the above table. The
after-tax returns shown are not relevant to investors who hold their shares
through tax-deferred arrangements, such as 401(k) plans or individual retirement
accounts.

After-tax returns are shown only for Class A. After-tax returns for other
classes will vary.
Average Annual Returns, Caption rr_AverageAnnualReturnCaption Average Annual Total Returns (as of the periods ended December 31, 2010)
GNMA Securities (Prospectus Summary) | GNMA Securities | Class A
  
Risk/Return: rr_RiskReturnAbstract  
Year to Date Return, Label rr_YearToDateReturnLabel year-to-date return
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Jun. 30, 2011
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 2.89%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel highest return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2001
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 5.67%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel lowest return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Jun. 30, 2004
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (2.15%)
GNMA Securities | Citigroup Mortgage GNMA Index
  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, Label rr_AverageAnnualReturnLabel Citigroup Mortgage GNMA Index
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 6.63%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 6.25%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 5.90%
GNMA Securities | BofA Merrill Lynch Mortgages GNMA Master Index
  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, Label rr_AverageAnnualReturnLabel BofA Merrill Lynch Mortgages GNMA Master Index [1]
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 6.76%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 6.26%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 5.94%
GNMA Securities | Class A
  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 4.75%
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of the amount redeemed or original purchase cost) rr_MaximumDeferredSalesChargeOverOfferingPrice none [2]
Maximum Sales Charge (Load) Imposed on Reinvested Dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee rr_RedemptionFee none
Management Fees rr_ManagementFeesOverAssets 0.46%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.35%
Other Expenses rr_OtherExpensesOverAssets 0.33%
Total Annual Fund Operating Expenses Before Fee Waivers and/or Expense Reimbursements rr_ExpensesOverAssets 1.14%
Fee Waivers and/or Expense Reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.15%)
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements rr_NetExpensesOverAssets 0.99% [3],[4]
Expense Example, With Redemption, 1 Year rr_ExpenseExampleYear01 571
Expense Example, With Redemption, 3 Years rr_ExpenseExampleYear03 775
Expense Example, With Redemption, 5 Years rr_ExpenseExampleYear05 996
Expense Example, With Redemption, 10 Years rr_ExpenseExampleYear10 1,630
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 571
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 775
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 996
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 1,630
Annual Return 2001 rr_AnnualReturn2001 7.48%
Annual Return 2002 rr_AnnualReturn2002 11.53%
Annual Return 2003 rr_AnnualReturn2003 2.12%
Annual Return 2004 rr_AnnualReturn2004 3.94%
Annual Return 2005 rr_AnnualReturn2005 2.28%
Annual Return 2006 rr_AnnualReturn2006 3.57%
Annual Return 2007 rr_AnnualReturn2007 6.92%
Annual Return 2008 rr_AnnualReturn2008 8.68%
Annual Return 2009 rr_AnnualReturn2009 2.99%
Annual Return 2010 rr_AnnualReturn2010 6.13%
Average Annual Returns, Label rr_AverageAnnualReturnLabel Class A
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 1.07%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 4.61%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 5.01%
GNMA Securities | Class A | After Taxes on Distributions
  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions (Class A)
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 (0.94%)
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 2.91%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 3.24%
GNMA Securities | Class A | After Taxes on Distributions and Sales
  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares (Class A) [5]
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 0.68%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 2.93%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 3.22%
GNMA Securities | Class B
  
Risk/Return: 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 lesser of the amount redeemed or original purchase cost) rr_MaximumDeferredSalesChargeOverOfferingPrice 4.00% [2]
Maximum Sales Charge (Load) Imposed on Reinvested Dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee rr_RedemptionFee none
Management Fees rr_ManagementFeesOverAssets 0.46%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.39%
Total Annual Fund Operating Expenses Before Fee Waivers and/or Expense Reimbursements rr_ExpensesOverAssets 1.85%
Fee Waivers and/or Expense Reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.21%)
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements rr_NetExpensesOverAssets 1.64% [3],[4]
Expense Example, With Redemption, 1 Year rr_ExpenseExampleYear01 567
Expense Example, With Redemption, 3 Years rr_ExpenseExampleYear03 817
Expense Example, With Redemption, 5 Years rr_ExpenseExampleYear05 1,092
Expense Example, With Redemption, 10 Years rr_ExpenseExampleYear10 1,770
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 167
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 517
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 892
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 1,770
Average Annual Returns, Label rr_AverageAnnualReturnLabel Class B
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 1.44%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 4.62%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 4.84%
GNMA Securities | Class C
  
Risk/Return: 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 lesser of the amount redeemed or original purchase cost) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00% [2]
Maximum Sales Charge (Load) Imposed on Reinvested Dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee rr_RedemptionFee none
Management Fees rr_ManagementFeesOverAssets 0.46%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.35%
Total Annual Fund Operating Expenses Before Fee Waivers and/or Expense Reimbursements rr_ExpensesOverAssets 1.81%
Fee Waivers and/or Expense Reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.17%)
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements rr_NetExpensesOverAssets 1.64% [3],[4]
Expense Example, With Redemption, 1 Year rr_ExpenseExampleYear01 267
Expense Example, With Redemption, 3 Years rr_ExpenseExampleYear03 517
Expense Example, With Redemption, 5 Years rr_ExpenseExampleYear05 892
Expense Example, With Redemption, 10 Years rr_ExpenseExampleYear10 1,944
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 167
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 517
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 892
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,944
Average Annual Returns, Label rr_AverageAnnualReturnLabel Class C
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 4.44%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 4.95%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 4.83%
[1] The Fund has replaced the benchmark used in the Table for the prior fiscal year (the Citigroup Mortgage GNMA Index) with BofA Merrill Lynch Mortgages GNMA Master Index, which management believes is a comparable index. Management further believes that the change will enhance the operations and administration of the Fund.
[2] Purchases of Class A shares of $1 million or more will be subject to a contingent deferred sales charge (CDSC) on redemptions made within two years of purchase. The CDSC on Class B shares applies only if shares are redeemed within six years of their purchase. The CDSC on Class C shares applies only if shares are redeemed within twelve months of their purchase. See pages 26-28 of the Prospectus for more information about the CDSCs.
[3] Any waivers or reimbursements made by SunAmerica with respect to the Fund are subject to recoupment from the Fund within the following two years, provided that the Fund is able to effect such payment to SunAmerica and remain in compliance with the applicable expense limitations.
[4] Pursuant to an Expense Limitation Agreement, SunAmerica Asset Management Corp. is contractually obligated to waive its fees and/or reimburse expenses to the extent that the Total Annual Fund Operating Expenses exceed 0.99%, 1.64% and 1.64%, for Class A, B and C shares, respectively. For purposes of the Expense Limitation Agreement, "Total Annual Fund Operating Expenses" shall not include extraordinary expenses, as determined under generally accepted accounting principles, or acquired fund fees and expenses. This agreement will continue in effect indefinitely, unless terminated by the Board of Trustees, including a majority of the Independent Trustees.
[5] When the return after taxes on distributions and sale of Fund shares is higher, it is because of realized losses. If realized losses occur upon the sale of Fund shares, the capital loss is recorded as a tax benefit, which increases the return.