2.3.0.11 Html 4 17 1 false 4 0 false 2 false false R2.htm 0000000 - Document - Supplement Sheet http://vanguard/role/Supplement Supplement false false R3.htm 010000 - Document - Risk/Return Summary {Unlabeled} Sheet http://xbrl.sec.gov/rr/role/RiskReturn Risk/Return Summary false true R4.htm 030000 - Document - Risk/Return Detail {Unlabeled} Sheet http://xbrl.sec.gov/rr/role/RiskReturnDetail Risk/Return Detail true false All Reports Book All Reports assetallocsupp-20110930.xml assetallocsupp-20110930.xsd assetallocsupp-20110930_cal.xml assetallocsupp-20110930_def.xml assetallocsupp-20110930_lab.xml assetallocsupp-20110930_pre.xml true true