3.24.2.u1 html 253 23 1 true 31 0 false 3 false false R1.htm 030000 - Disclosure - Form N-CSR Cover Sheet http://xbrl.sec.gov/oef/role/NcsrCover Form N-CSR Cover Cover 1 false false R2.htm 030001 - Disclosure - Shareholder Report Sheet http://xbrl.sec.gov/oef/role/ShareholderReport Shareholder Report Notes 2 false false R3.htm 040020 - Disclosure - Shareholder Report, Holdings (Details) Sheet http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails Shareholder Report, Holdings (Details) Details 3 false false All Reports Book All Reports 8dcc61d05a78447.htm cik0000004568-20240630.xsd cik0000004568-20240630_def.xml cik0000004568-20240630_lab.xml cik0000004568-20240630_pre.xml chartimages_1168067.jpg chartimages_1168109.jpg chartimages_1168151.jpg chartimages_1168193.jpg chartimages_1168235.jpg chartimages_1168277.jpg chartimages_1168319.jpg chartimages_1168361.jpg chartimages_1168403.jpg chartimages_1168445.jpg chartimages_1168487.jpg chartimages_1168529.jpg chartimages_1168571.jpg chartimages_1168613.jpg chartimages_1168655.jpg chartimages_1168697.jpg chartimages_1168739.jpg chartimages_1168781.jpg chartimages_1168823.jpg chartimages_1168865.jpg chartimages_1168907.jpg images_1587.jpg images_1593.jpg images_1594.jpg images_1595.jpg images_1596.jpg images_1597.jpg images_1598.jpg images_1599.jpg images_1600.jpg images_1601.jpg images_1602.jpg images_1603.jpg images_1604.jpg images_1605.jpg images_1606.jpg images_1607.jpg images_1608.jpg images_1609.jpg images_1610.jpg images_1622.jpg img550f73991.jpg http://fasb.org/us-gaap/2024 http://xbrl.sec.gov/dei/2024 http://xbrl.sec.gov/oef/2024 true false