2.4.0.6 Html 132 89 1 true 102 0 false 2 false false R1.htm 000001 - Document - Document and Entity Information {Elements} {(Imported)} Sheet http://www.bmofundsus.com/role/DocumentDocumentAndEntityInformationElementsImported Document and Entity Information false true R2.htm 000101 - Document - Risk/Return Summary {Unlabeled} - (BMO Large-Cap Value Fund) Sheet http://www.bmofundsus.com/role/DocumentRiskReturnSummaryUnlabeledBmoLargeCapValueFund Risk/Return Summary - (BMO Large-Cap Value Fund) false false R8.htm 000108 - Disclosure - Risk/Return Detail Data {Elements} - (BMO Large-Cap Value Fund) Sheet http://www.bmofundsus.com/role/DisclosureRiskReturnDetailDataElementsBmoLargeCapValueFund Risk/Return Detail Data - (BMO Large-Cap Value Fund) false true R9.htm 000201 - Document - Risk/Return Summary {Unlabeled} - (BMO Dividend Income Fund) Sheet http://www.bmofundsus.com/role/DocumentRiskReturnSummaryUnlabeledBmoDividendIncomeFund Risk/Return Summary - (BMO Dividend Income Fund) false false R13.htm 000208 - Disclosure - Risk/Return Detail Data {Elements} - (BMO Dividend Income Fund) Sheet http://www.bmofundsus.com/role/DisclosureRiskReturnDetailDataElementsBmoDividendIncomeFund Risk/Return Detail Data - (BMO Dividend Income Fund) false true R14.htm 000301 - Document - Risk/Return Summary {Unlabeled} - (BMO Large-Cap Growth Fund) Sheet http://www.bmofundsus.com/role/DocumentRiskReturnSummaryUnlabeledBmoLargeCapGrowthFund Risk/Return Summary - (BMO Large-Cap Growth Fund) false false R20.htm 000308 - Disclosure - Risk/Return Detail Data {Elements} - (BMO Large-Cap Growth Fund) Sheet http://www.bmofundsus.com/role/DisclosureRiskReturnDetailDataElementsBmoLargeCapGrowthFund Risk/Return Detail Data - (BMO Large-Cap Growth Fund) false true R21.htm 000401 - Document - Risk/Return Summary {Unlabeled} - (BMO Large-Cap Focus Fund) Sheet http://www.bmofundsus.com/role/DocumentRiskReturnSummaryUnlabeledBmoLargeCapFocusFund Risk/Return Summary - (BMO Large-Cap Focus Fund) false false R25.htm 000408 - Disclosure - Risk/Return Detail Data {Elements} - (BMO Large-Cap Focus Fund) Sheet http://www.bmofundsus.com/role/DisclosureRiskReturnDetailDataElementsBmoLargeCapFocusFund Risk/Return Detail Data - (BMO Large-Cap Focus Fund) false true R26.htm 000501 - Document - Risk/Return Summary {Unlabeled} - (BMO Mid-Cap Value Fund) Sheet http://www.bmofundsus.com/role/DocumentRiskReturnSummaryUnlabeledBmoMidCapValueFund Risk/Return Summary - (BMO Mid-Cap Value Fund) false false R32.htm 000508 - Disclosure - Risk/Return Detail Data {Elements} - (BMO Mid-Cap Value Fund) Sheet http://www.bmofundsus.com/role/DisclosureRiskReturnDetailDataElementsBmoMidCapValueFund Risk/Return Detail Data - (BMO Mid-Cap Value Fund) false true R33.htm 000601 - Document - Risk/Return Summary {Unlabeled} - (BMO Mid-Cap Growth Fund) Sheet http://www.bmofundsus.com/role/DocumentRiskReturnSummaryUnlabeledBmoMidCapGrowthFund Risk/Return Summary - (BMO Mid-Cap Growth Fund) false false R39.htm 000608 - Disclosure - Risk/Return Detail Data {Elements} - (BMO Mid-Cap Growth Fund) Sheet http://www.bmofundsus.com/role/DisclosureRiskReturnDetailDataElementsBmoMidCapGrowthFund Risk/Return Detail Data - (BMO Mid-Cap Growth Fund) false true R40.htm 000701 - Document - Risk/Return Summary {Unlabeled} - (BMO Small-Cap Value Fund) Sheet http://www.bmofundsus.com/role/DocumentRiskReturnSummaryUnlabeledBmoSmallCapValueFund Risk/Return Summary - (BMO Small-Cap Value Fund) false false R44.htm 000708 - Disclosure - Risk/Return Detail Data {Elements} - (BMO Small-Cap Value Fund) Sheet http://www.bmofundsus.com/role/DisclosureRiskReturnDetailDataElementsBmoSmallCapValueFund Risk/Return Detail Data - (BMO Small-Cap Value Fund) false true R45.htm 000801 - Document - Risk/Return Summary {Unlabeled} - (BMO Small-Cap Growth Fund) Sheet http://www.bmofundsus.com/role/DocumentRiskReturnSummaryUnlabeledBmoSmallCapGrowthFund Risk/Return Summary - (BMO Small-Cap Growth Fund) false false R51.htm 000808 - Disclosure - Risk/Return Detail Data {Elements} - (BMO Small-Cap Growth Fund) Sheet http://www.bmofundsus.com/role/DisclosureRiskReturnDetailDataElementsBmoSmallCapGrowthFund Risk/Return Detail Data - (BMO Small-Cap Growth Fund) false true R52.htm 000901 - Document - Risk/Return Summary {Unlabeled} - (BMO Pyrford International Stock Fund) Sheet http://www.bmofundsus.com/role/DocumentRiskReturnSummaryUnlabeledBmoPyrfordInternationalStockFund Risk/Return Summary - (BMO Pyrford International Stock Fund) false false R56.htm 000908 - Disclosure - Risk/Return Detail Data {Elements} - (BMO Pyrford International Stock Fund) Sheet http://www.bmofundsus.com/role/DisclosureRiskReturnDetailDataElementsBmoPyrfordInternationalStockFund Risk/Return Detail Data - (BMO Pyrford International Stock Fund) false true R57.htm 001001 - Document - Risk/Return Summary {Unlabeled} - (BMO Lloyd George Emerging Markets Equity Fund) Sheet http://www.bmofundsus.com/role/DocumentRiskReturnSummaryUnlabeledBmoLloydGeorgeEmergingMarketsEquityFund Risk/Return Summary - (BMO Lloyd George Emerging Markets Equity Fund) false false R63.htm 001008 - Disclosure - Risk/Return Detail Data {Elements} - (BMO Lloyd George Emerging Markets Equity Fund) Sheet http://www.bmofundsus.com/role/DisclosureRiskReturnDetailDataElementsBmoLloydGeorgeEmergingMarketsEquityFund Risk/Return Detail Data - (BMO Lloyd George Emerging Markets Equity Fund) false true R64.htm 001101 - Document - Risk/Return Summary {Unlabeled} - (BMO Pyrford Global Strategic Return Fund) Sheet http://www.bmofundsus.com/role/DocumentRiskReturnSummaryUnlabeledBmoPyrfordGlobalStrategicReturnFund Risk/Return Summary - (BMO Pyrford Global Strategic Return Fund) false false R68.htm 001108 - Disclosure - Risk/Return Detail Data {Elements} - (BMO Pyrford Global Strategic Return Fund) Sheet http://www.bmofundsus.com/role/DisclosureRiskReturnDetailDataElementsBmoPyrfordGlobalStrategicReturnFund Risk/Return Detail Data - (BMO Pyrford Global Strategic Return Fund) false true R69.htm 001201 - Document - Risk/Return Summary {Unlabeled} - (BMO Ultra Short Tax-Free Fund) Sheet http://www.bmofundsus.com/role/DocumentRiskReturnSummaryUnlabeledBmoUltraShortTaxFreeFund Risk/Return Summary - (BMO Ultra Short Tax-Free Fund) false false R75.htm 001208 - Disclosure - Risk/Return Detail Data {Elements} - (BMO Ultra Short Tax-Free Fund) Sheet http://www.bmofundsus.com/role/DisclosureRiskReturnDetailDataElementsBmoUltraShortTaxFreeFund Risk/Return Detail Data - (BMO Ultra Short Tax-Free Fund) false true R76.htm 001301 - Document - Risk/Return Summary {Unlabeled} - (BMO Short-Term Income Fund) Sheet http://www.bmofundsus.com/role/DocumentRiskReturnSummaryUnlabeledBmoShortTermIncomeFund Risk/Return Summary - (BMO Short-Term Income Fund) false false R82.htm 001308 - Disclosure - Risk/Return Detail Data {Elements} - (BMO Short-Term Income Fund) Sheet http://www.bmofundsus.com/role/DisclosureRiskReturnDetailDataElementsBmoShortTermIncomeFund Risk/Return Detail Data - (BMO Short-Term Income Fund) false true R83.htm 001401 - Document - Risk/Return Summary {Unlabeled} - (BMO Short-Intermediate Bond Fund) Sheet http://www.bmofundsus.com/role/DocumentRiskReturnSummaryUnlabeledBmoShortIntermediateBondFund Risk/Return Summary - (BMO Short-Intermediate Bond Fund) false false R89.htm 001408 - Disclosure - Risk/Return Detail Data {Elements} - (BMO Short-Intermediate Bond Fund) Sheet http://www.bmofundsus.com/role/DisclosureRiskReturnDetailDataElementsBmoShortIntermediateBondFund Risk/Return Detail Data - (BMO Short-Intermediate Bond Fund) false true R90.htm 001501 - Document - Risk/Return Summary {Unlabeled} - (BMO Intermediate Tax-Free Fund) Sheet http://www.bmofundsus.com/role/DocumentRiskReturnSummaryUnlabeledBmoIntermediateTaxFreeFund Risk/Return Summary - (BMO Intermediate Tax-Free Fund) false false R96.htm 001508 - Disclosure - Risk/Return Detail Data {Elements} - (BMO Intermediate Tax-Free Fund) Sheet http://www.bmofundsus.com/role/DisclosureRiskReturnDetailDataElementsBmoIntermediateTaxFreeFund Risk/Return Detail Data - (BMO Intermediate Tax-Free Fund) false true R97.htm 001601 - Document - Risk/Return Summary {Unlabeled} - (BMO Government Income Fund) Sheet http://www.bmofundsus.com/role/DocumentRiskReturnSummaryUnlabeledBmoGovernmentIncomeFund Risk/Return Summary - (BMO Government Income Fund) false false R103.htm 001608 - Disclosure - Risk/Return Detail Data {Elements} - (BMO Government Income Fund) Sheet http://www.bmofundsus.com/role/DisclosureRiskReturnDetailDataElementsBmoGovernmentIncomeFund Risk/Return Detail Data - (BMO Government Income Fund) false true R104.htm 001701 - Document - Risk/Return Summary {Unlabeled} - (BMO TCH Corporate Income Fund) Sheet http://www.bmofundsus.com/role/DocumentRiskReturnSummaryUnlabeledBmoTchCorporateIncomeFund Risk/Return Summary - (BMO TCH Corporate Income Fund) false false R110.htm 001708 - Disclosure - Risk/Return Detail Data {Elements} - (BMO TCH Corporate Income Fund) Sheet http://www.bmofundsus.com/role/DisclosureRiskReturnDetailDataElementsBmoTchCorporateIncomeFund Risk/Return Detail Data - (BMO TCH Corporate Income Fund) false true R111.htm 001801 - Document - Risk/Return Summary {Unlabeled} - (BMO Aggregate Bond Fund) Sheet http://www.bmofundsus.com/role/DocumentRiskReturnSummaryUnlabeledBmoAggregateBondFund Risk/Return Summary - (BMO Aggregate Bond Fund) false false R117.htm 001808 - Disclosure - Risk/Return Detail Data {Elements} - (BMO Aggregate Bond Fund) Sheet http://www.bmofundsus.com/role/DisclosureRiskReturnDetailDataElementsBmoAggregateBondFund Risk/Return Detail Data - (BMO Aggregate Bond Fund) false true R118.htm 001901 - Document - Risk/Return Summary {Unlabeled} - (BMO TCH Core Plus Bond Fund) Sheet http://www.bmofundsus.com/role/DocumentRiskReturnSummaryUnlabeledBmoTchCorePlusBondFund Risk/Return Summary - (BMO TCH Core Plus Bond Fund) false false R124.htm 001908 - Disclosure - Risk/Return Detail Data {Elements} - (BMO TCH Core Plus Bond Fund) Sheet http://www.bmofundsus.com/role/DisclosureRiskReturnDetailDataElementsBmoTchCorePlusBondFund Risk/Return Detail Data - (BMO TCH Core Plus Bond Fund) false true R125.htm 002001 - Document - Risk/Return Summary {Unlabeled} - (BMO Monegy High Yield Bond Fund) Sheet http://www.bmofundsus.com/role/DocumentRiskReturnSummaryUnlabeledBmoMonegyHighYieldBondFund Risk/Return Summary - (BMO Monegy High Yield Bond Fund) false false R129.htm 002008 - Disclosure - Risk/Return Detail Data {Elements} - (BMO Monegy High Yield Bond Fund) Sheet http://www.bmofundsus.com/role/DisclosureRiskReturnDetailDataElementsBmoMonegyHighYieldBondFund Risk/Return Detail Data - (BMO Monegy High Yield Bond Fund) false true R130.htm 002101 - Document - Risk/Return Summary {Unlabeled} - (BMO Government Money Market Fund) Sheet http://www.bmofundsus.com/role/DocumentRiskReturnSummaryUnlabeledBmoGovernmentMoneyMarketFund Risk/Return Summary - (BMO Government Money Market Fund) false false R136.htm 002108 - Disclosure - Risk/Return Detail Data {Elements} - (BMO Government Money Market Fund) Sheet http://www.bmofundsus.com/role/DisclosureRiskReturnDetailDataElementsBmoGovernmentMoneyMarketFund Risk/Return Detail Data - (BMO Government Money Market Fund) false true R137.htm 002201 - Document - Risk/Return Summary {Unlabeled} - (BMO Tax-Free Money Market Fund) Sheet http://www.bmofundsus.com/role/DocumentRiskReturnSummaryUnlabeledBmoTaxFreeMoneyMarketFund Risk/Return Summary - (BMO Tax-Free Money Market Fund) false false R143.htm 002208 - Disclosure - Risk/Return Detail Data {Elements} - (BMO Tax-Free Money Market Fund) Sheet http://www.bmofundsus.com/role/DisclosureRiskReturnDetailDataElementsBmoTaxFreeMoneyMarketFund Risk/Return Detail Data - (BMO Tax-Free Money Market Fund) false true R144.htm 002301 - Document - Risk/Return Summary {Unlabeled} - (BMO Prime Money Market Fund) Sheet http://www.bmofundsus.com/role/DocumentRiskReturnSummaryUnlabeledBmoPrimeMoneyMarketFund Risk/Return Summary - (BMO Prime Money Market Fund) false false R150.htm 002308 - Disclosure - Risk/Return Detail Data {Elements} - (BMO Prime Money Market Fund) Sheet http://www.bmofundsus.com/role/DisclosureRiskReturnDetailDataElementsBmoPrimeMoneyMarketFund Risk/Return Detail Data - (BMO Prime Money Market Fund) false false R151.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 cik0000889366-20111229.xml cik0000889366-20111229.xsd cik0000889366-20111229_cal.xml cik0000889366-20111229_def.xml cik0000889366-20111229_lab.xml cik0000889366-20111229_pre.xml BarChart1.jpg BarChart2.jpg BarChart3.jpg BarChart4.jpg BarChart5.jpg BarChart6.jpg BarChart7.jpg BarChart8.jpg BarChart9.jpg BarChart10.jpg BarChart11.jpg BarChart12.jpg BarChart13.jpg BarChart14.jpg BarChart15.jpg BarChart16.jpg BarChart17.jpg true true