<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.24.4</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>1374</ContextCount>
  <ElementCount>77</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>242</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>2</UnitCount>
  <MyReports>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>010000 - Disclosure - Form N-1A Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/rr/role/N1aCover</Role>
      <ShortName>Form N-1A Cover</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>010001 - Disclosure - Investment Objectives and Goals</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/rr/role/RiskReturn</Role>
      <ShortName>Investment Objectives and Goals</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>010002 - Disclosure - Fees and Expenses</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/rr/role/FeesAndExpenses</Role>
      <ShortName>Fees and Expenses</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>010003 - Disclosure - Investment Strategy</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/rr/role/InvestmentStrategy</Role>
      <ShortName>Investment Strategy</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>010004 - Disclosure - Investment Risks</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/rr/role/InvestmentRisks</Role>
      <ShortName>Investment Risks</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>010005 - Disclosure - Performance Management</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/rr/role/PerformanceManagement</Role>
      <ShortName>Performance Management</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>020010 - Disclosure - Shareholder Fees</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/rr/role/ShareholderFeesData</Role>
      <ShortName>Shareholder Fees</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>020020 - Disclosure - Annual Fund Operating Expenses</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/rr/role/OperatingExpensesData</Role>
      <ShortName>Annual Fund Operating Expenses</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>020030 - Disclosure - Expense Example</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/rr/role/ExpenseExample</Role>
      <ShortName>Expense Example</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>020040 - Disclosure - Expense Example, No Redemption</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption</Role>
      <ShortName>Expense Example, No Redemption</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>020050 - Disclosure - Annual Total Returns</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/rr/role/BarChartData</Role>
      <ShortName>Annual Total Returns</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>020060 - Disclosure - Average Annual Total Returns</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/rr/role/PerformanceTableData</Role>
      <ShortName>Average Annual Total Returns</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>020100 - Document - Risk/Return Summary {Unlabeled} - American Funds 2070 Target Date Retirement Fund - American Funds 2070 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DocumentRiskReturnSummaryUnlabeledAmericanFunds2070TargetDateRetirementFundAmericanFunds2070TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Summary- American Funds 2070 Target Date Retirement Fund - American Funds 2070 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>020101 - Disclosure - Risk/Return Detail Data {Elements} - American Funds 2070 Target Date Retirement Fund - American Funds 2070 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DisclosureRiskReturnDetailDataElementsAmericanFunds2070TargetDateRetirementFundAmericanFunds2070TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Detail Data- American Funds 2070 Target Date Retirement Fund - American Funds 2070 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>020102 - Document - Risk/Return Summary {Unlabeled} - American Funds 2065 Target Date Retirement Fund - American Funds 2065 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DocumentRiskReturnSummaryUnlabeledAmericanFunds2065TargetDateRetirementFundAmericanFunds2065TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Summary- American Funds 2065 Target Date Retirement Fund - American Funds 2065 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>020103 - Disclosure - Risk/Return Detail Data {Elements} - American Funds 2065 Target Date Retirement Fund - American Funds 2065 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DisclosureRiskReturnDetailDataElementsAmericanFunds2065TargetDateRetirementFundAmericanFunds2065TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Detail Data- American Funds 2065 Target Date Retirement Fund - American Funds 2065 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>020104 - Document - Risk/Return Summary {Unlabeled} - American Funds 2060 Target Date Retirement Fund - American Funds 2060 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DocumentRiskReturnSummaryUnlabeledAmericanFunds2060TargetDateRetirementFundAmericanFunds2060TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Summary- American Funds 2060 Target Date Retirement Fund - American Funds 2060 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>020105 - Disclosure - Risk/Return Detail Data {Elements} - American Funds 2060 Target Date Retirement Fund - American Funds 2060 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DisclosureRiskReturnDetailDataElementsAmericanFunds2060TargetDateRetirementFundAmericanFunds2060TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Detail Data- American Funds 2060 Target Date Retirement Fund - American Funds 2060 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>020106 - Document - Risk/Return Summary {Unlabeled} - American Funds 2055 Target Date Retirement Fund - American Funds 2055 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DocumentRiskReturnSummaryUnlabeledAmericanFunds2055TargetDateRetirementFundAmericanFunds2055TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Summary- American Funds 2055 Target Date Retirement Fund - American Funds 2055 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>020107 - Disclosure - Risk/Return Detail Data {Elements} - American Funds 2055 Target Date Retirement Fund - American Funds 2055 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DisclosureRiskReturnDetailDataElementsAmericanFunds2055TargetDateRetirementFundAmericanFunds2055TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Detail Data- American Funds 2055 Target Date Retirement Fund - American Funds 2055 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>020108 - Document - Risk/Return Summary {Unlabeled} - American Funds 2050 Target Date Retirement Fund - American Funds 2050 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DocumentRiskReturnSummaryUnlabeledAmericanFunds2050TargetDateRetirementFundAmericanFunds2050TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Summary- American Funds 2050 Target Date Retirement Fund - American Funds 2050 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>020109 - Disclosure - Risk/Return Detail Data {Elements} - American Funds 2050 Target Date Retirement Fund - American Funds 2050 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DisclosureRiskReturnDetailDataElementsAmericanFunds2050TargetDateRetirementFundAmericanFunds2050TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Detail Data- American Funds 2050 Target Date Retirement Fund - American Funds 2050 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>020110 - Document - Risk/Return Summary {Unlabeled} - American Funds 2045 Target Date Retirement Fund - American Funds 2045 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DocumentRiskReturnSummaryUnlabeledAmericanFunds2045TargetDateRetirementFundAmericanFunds2045TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Summary- American Funds 2045 Target Date Retirement Fund - American Funds 2045 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>020111 - Disclosure - Risk/Return Detail Data {Elements} - American Funds 2045 Target Date Retirement Fund - American Funds 2045 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DisclosureRiskReturnDetailDataElementsAmericanFunds2045TargetDateRetirementFundAmericanFunds2045TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Detail Data- American Funds 2045 Target Date Retirement Fund - American Funds 2045 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>020112 - Document - Risk/Return Summary {Unlabeled} - American Funds 2040 Target Date Retirement Fund - American Funds 2040 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DocumentRiskReturnSummaryUnlabeledAmericanFunds2040TargetDateRetirementFundAmericanFunds2040TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Summary- American Funds 2040 Target Date Retirement Fund - American Funds 2040 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>020113 - Disclosure - Risk/Return Detail Data {Elements} - American Funds 2040 Target Date Retirement Fund - American Funds 2040 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DisclosureRiskReturnDetailDataElementsAmericanFunds2040TargetDateRetirementFundAmericanFunds2040TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Detail Data- American Funds 2040 Target Date Retirement Fund - American Funds 2040 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>020114 - Document - Risk/Return Summary {Unlabeled} - American Funds 2035 Target Date Retirement Fund - American Funds 2035 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DocumentRiskReturnSummaryUnlabeledAmericanFunds2035TargetDateRetirementFundAmericanFunds2035TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Summary- American Funds 2035 Target Date Retirement Fund - American Funds 2035 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>020115 - Disclosure - Risk/Return Detail Data {Elements} - American Funds 2035 Target Date Retirement Fund - American Funds 2035 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DisclosureRiskReturnDetailDataElementsAmericanFunds2035TargetDateRetirementFundAmericanFunds2035TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Detail Data- American Funds 2035 Target Date Retirement Fund - American Funds 2035 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>020116 - Document - Risk/Return Summary {Unlabeled} - American Funds 2030 Target Date Retirement Fund - American Funds 2030 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DocumentRiskReturnSummaryUnlabeledAmericanFunds2030TargetDateRetirementFundAmericanFunds2030TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Summary- American Funds 2030 Target Date Retirement Fund - American Funds 2030 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>020117 - Disclosure - Risk/Return Detail Data {Elements} - American Funds 2030 Target Date Retirement Fund - American Funds 2030 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DisclosureRiskReturnDetailDataElementsAmericanFunds2030TargetDateRetirementFundAmericanFunds2030TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Detail Data- American Funds 2030 Target Date Retirement Fund - American Funds 2030 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>020118 - Document - Risk/Return Summary {Unlabeled} - American Funds 2025 Target Date Retirement Fund - American Funds 2025 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DocumentRiskReturnSummaryUnlabeledAmericanFunds2025TargetDateRetirementFundAmericanFunds2025TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Summary- American Funds 2025 Target Date Retirement Fund - American Funds 2025 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>020119 - Disclosure - Risk/Return Detail Data {Elements} - American Funds 2025 Target Date Retirement Fund - American Funds 2025 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DisclosureRiskReturnDetailDataElementsAmericanFunds2025TargetDateRetirementFundAmericanFunds2025TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Detail Data- American Funds 2025 Target Date Retirement Fund - American Funds 2025 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>020120 - Document - Risk/Return Summary {Unlabeled} - American Funds 2020 Target Date Retirement Fund - American Funds 2020 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DocumentRiskReturnSummaryUnlabeledAmericanFunds2020TargetDateRetirementFundAmericanFunds2020TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Summary- American Funds 2020 Target Date Retirement Fund - American Funds 2020 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>020121 - Disclosure - Risk/Return Detail Data {Elements} - American Funds 2020 Target Date Retirement Fund - American Funds 2020 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DisclosureRiskReturnDetailDataElementsAmericanFunds2020TargetDateRetirementFundAmericanFunds2020TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Detail Data- American Funds 2020 Target Date Retirement Fund - American Funds 2020 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>020122 - Document - Risk/Return Summary {Unlabeled} - American Funds 2015 Target Date Retirement Fund - American Funds 2015 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DocumentRiskReturnSummaryUnlabeledAmericanFunds2015TargetDateRetirementFundAmericanFunds2015TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Summary- American Funds 2015 Target Date Retirement Fund - American Funds 2015 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>020123 - Disclosure - Risk/Return Detail Data {Elements} - American Funds 2015 Target Date Retirement Fund - American Funds 2015 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DisclosureRiskReturnDetailDataElementsAmericanFunds2015TargetDateRetirementFundAmericanFunds2015TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Detail Data- American Funds 2015 Target Date Retirement Fund - American Funds 2015 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>020124 - Document - Risk/Return Summary {Unlabeled} - American Funds 2010 Target Date Retirement Fund - American Funds 2010 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DocumentRiskReturnSummaryUnlabeledAmericanFunds2010TargetDateRetirementFundAmericanFunds2010TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Summary- American Funds 2010 Target Date Retirement Fund - American Funds 2010 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="ck0001380175-20241031.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>020125 - Disclosure - Risk/Return Detail Data {Elements} - American Funds 2010 Target Date Retirement Fund - American Funds 2010 Target Date Retirement Fund</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.american.com/20241031/role/DisclosureRiskReturnDetailDataElementsAmericanFunds2010TargetDateRetirementFundAmericanFunds2010TargetDateRetirementFund</Role>
      <ShortName>Risk/Return Detail Data- American Funds 2010 Target Date Retirement Fund - American Funds 2010 Target Date Retirement Fund</ShortName>
      <MenuCategory>Risk/Return</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="485BPOS" isN1a="true" isOEF="true" isRRorOEF="true" isUsgaap="true" original="ck0001380175-20241031.htm">ck0001380175-20241031.htm</File>
    <File>ck0001380175-20241031.xsd</File>
    <File>ck0001380175-20241031_def.xml</File>
    <File>ck0001380175-20241031_lab.xml</File>
    <File>ck0001380175-20241031_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>image_001.jpg</File>
    <File>image_002.jpg</File>
    <File>image_003.jpg</File>
    <File>image_004.jpg</File>
    <File>image_005.jpg</File>
    <File>image_006.jpg</File>
    <File>image_007.jpg</File>
    <File>image_008.jpg</File>
    <File>image_009.jpg</File>
    <File>image_010.jpg</File>
    <File>image_011.jpg</File>
    <File>image_012.jpg</File>
    <File>image_013.jpg</File>
    <File>image_014.jpg</File>
    <File>image_015.jpg</File>
    <File>image_016.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="6">http://xbrl.sec.gov/dei/2024</BaseTaxonomy>
    <BaseTaxonomy items="4210">http://xbrl.sec.gov/oef/2024</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>false</HasCalculationLinkbase>
</FilingSummary>
