2.4.0.6 Html 2 15 1 false 1 0 false 0 false false R1.htm 000000 - Document - Document and Entity Information Sheet http://www.ingfunds.com/role/DocumentDocumentandEntityInformation Document and Entity Information false false R2.htm 000010 - Document - Risk/Return Supplement {Unlabeled} - ING International Small Cap Fund Sheet http://www.ingfunds.com/role/DocumentRiskReturnSupplementUnlabeledINGInternationalSmallCapFund Risk/Return Supplement - ING International Small Cap Fund false false R3.htm 000019 - Disclosure - Risk/Return Detail Data {Elements} - ING International Small Cap Fund Sheet http://www.ingfunds.com/role/DisclosureRiskReturnDetailDataElementsINGInternationalSmallCapFund Risk/Return Detail Data - ING International Small Cap Fund false false R4.htm 040000 - Disclosure - Risk/Return Detail Data {Elements} Sheet http://xbrl.sec.gov/rr/role/RiskReturnDetailData Risk/Return Detail Data true false All Reports Book All Reports ingmf-20130605.xml ingmf-20130605.xsd ingmf-20130605_cal.xml ingmf-20130605_def.xml ingmf-20130605_lab.xml ingmf-20130605_pre.xml true true