Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

MARSHALL FUNDS INC d/b/a BMO FUNDS

Prospectus Date

rr_ProspectusDate

Dec. 28, 2012

Supplement [Text Block]

mfibmo_SupplementTextBlock

BMO FUNDS

Supplement dated April 9, 2013 to the Prospectus dated December 28, 2012

IMPORTANT NOTICE ABOUT NAME CHANGE

Effective May 17, 2013, Marshall Funds, Inc. will change its corporate name to BMO Funds, Inc. The Funds have been doing business as “BMO Funds” since 2011. The individual Fund names and ticker symbols will not change. However, the CUSIP identifier for each class of shares for each Fund will change. The new CUSIP identifiers will be available online at: http://bmofundsus.com/newcusips.

Amendment of Benchmark Names

For the following Funds, the references to the benchmarks that appear in the Average Total Returns tables are amended as described below. No changes to the composition of the benchmarks have been made.

Fund	Name of Benchmark	Amended Name of Benchmark
BMO Ultra Short Tax-Free Fund	Barclays Capital 1-Year Municipal Bond Index	Barclays 1 Year Municipal Bond Index
BMO Short-Intermediate Bond Fund	Barclays Intermediate Governmental/Credit Index	Barclays U.S. Intermediate Government/Credit Bond Index
BMO Intermediate Tax-Free Fund	Barclays Capital Municipal Bond 1-15 Year Blend Index	Barclays 1-15 Year Blend Municipal Bond Index
BMO Government Income Fund	Barclays U.S. Mortgage-Backed Securities Index	Barclays U.S. MBS Index
BMO TCH Corporate Income Fund	Barclays Capital U.S. Credit Index	Barclays U.S. Credit Index
BMO Aggregate Bond Fund	Barclays Aggregate Bond Index	Barclays U.S. Aggregate Bond Index
BMO TCH Core Plus Bond Fund	Barclays Aggregate Bond Index	Barclays U.S. Aggregate Bond Index

BMO Government Income Fund

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

mfibmo_SupplementTextBlock

BMO FUNDS

Supplement dated April 9, 2013 to the Prospectus dated December 28, 2012

IMPORTANT NOTICE ABOUT NAME CHANGE

Effective May 17, 2013, Marshall Funds, Inc. will change its corporate name to BMO Funds, Inc. The Funds have been doing business as “BMO Funds” since 2011. The individual Fund names and ticker symbols will not change. However, the CUSIP identifier for each class of shares for each Fund will change. The new CUSIP identifiers will be available online at: http://bmofundsus.com/newcusips.

Amendment of Benchmark Names

For the following Funds, the references to the benchmarks that appear in the Average Total Returns tables are amended as described below. No changes to the composition of the benchmarks have been made.

Fund	Name of Benchmark	Amended Name of Benchmark
BMO Ultra Short Tax-Free Fund	Barclays Capital 1-Year Municipal Bond Index	Barclays 1 Year Municipal Bond Index
BMO Short-Intermediate Bond Fund	Barclays Intermediate Governmental/Credit Index	Barclays U.S. Intermediate Government/Credit Bond Index
BMO Intermediate Tax-Free Fund	Barclays Capital Municipal Bond 1-15 Year Blend Index	Barclays 1-15 Year Blend Municipal Bond Index
BMO Government Income Fund	Barclays U.S. Mortgage-Backed Securities Index	Barclays U.S. MBS Index
BMO TCH Corporate Income Fund	Barclays Capital U.S. Credit Index	Barclays U.S. Credit Index
BMO Aggregate Bond Fund	Barclays Aggregate Bond Index	Barclays U.S. Aggregate Bond Index
BMO TCH Core Plus Bond Fund	Barclays Aggregate Bond Index	Barclays U.S. Aggregate Bond Index

BMO Short-Intermediate Bond Fund

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

mfibmo_SupplementTextBlock

BMO FUNDS

Supplement dated April 9, 2013 to the Prospectus dated December 28, 2012

IMPORTANT NOTICE ABOUT NAME CHANGE

Effective May 17, 2013, Marshall Funds, Inc. will change its corporate name to BMO Funds, Inc. The Funds have been doing business as “BMO Funds” since 2011. The individual Fund names and ticker symbols will not change. However, the CUSIP identifier for each class of shares for each Fund will change. The new CUSIP identifiers will be available online at: http://bmofundsus.com/newcusips.

Amendment of Benchmark Names

For the following Funds, the references to the benchmarks that appear in the Average Total Returns tables are amended as described below. No changes to the composition of the benchmarks have been made.

Fund	Name of Benchmark	Amended Name of Benchmark
BMO Ultra Short Tax-Free Fund	Barclays Capital 1-Year Municipal Bond Index	Barclays 1 Year Municipal Bond Index
BMO Short-Intermediate Bond Fund	Barclays Intermediate Governmental/Credit Index	Barclays U.S. Intermediate Government/Credit Bond Index
BMO Intermediate Tax-Free Fund	Barclays Capital Municipal Bond 1-15 Year Blend Index	Barclays 1-15 Year Blend Municipal Bond Index
BMO Government Income Fund	Barclays U.S. Mortgage-Backed Securities Index	Barclays U.S. MBS Index
BMO TCH Corporate Income Fund	Barclays Capital U.S. Credit Index	Barclays U.S. Credit Index
BMO Aggregate Bond Fund	Barclays Aggregate Bond Index	Barclays U.S. Aggregate Bond Index
BMO TCH Core Plus Bond Fund	Barclays Aggregate Bond Index	Barclays U.S. Aggregate Bond Index

BMO Intermediate Tax-Free Fund

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

mfibmo_SupplementTextBlock

BMO FUNDS

Supplement dated April 9, 2013 to the Prospectus dated December 28, 2012

IMPORTANT NOTICE ABOUT NAME CHANGE

Effective May 17, 2013, Marshall Funds, Inc. will change its corporate name to BMO Funds, Inc. The Funds have been doing business as “BMO Funds” since 2011. The individual Fund names and ticker symbols will not change. However, the CUSIP identifier for each class of shares for each Fund will change. The new CUSIP identifiers will be available online at: http://bmofundsus.com/newcusips.

Amendment of Benchmark Names

For the following Funds, the references to the benchmarks that appear in the Average Total Returns tables are amended as described below. No changes to the composition of the benchmarks have been made.

Fund	Name of Benchmark	Amended Name of Benchmark
BMO Ultra Short Tax-Free Fund	Barclays Capital 1-Year Municipal Bond Index	Barclays 1 Year Municipal Bond Index
BMO Short-Intermediate Bond Fund	Barclays Intermediate Governmental/Credit Index	Barclays U.S. Intermediate Government/Credit Bond Index
BMO Intermediate Tax-Free Fund	Barclays Capital Municipal Bond 1-15 Year Blend Index	Barclays 1-15 Year Blend Municipal Bond Index
BMO Government Income Fund	Barclays U.S. Mortgage-Backed Securities Index	Barclays U.S. MBS Index
BMO TCH Corporate Income Fund	Barclays Capital U.S. Credit Index	Barclays U.S. Credit Index
BMO Aggregate Bond Fund	Barclays Aggregate Bond Index	Barclays U.S. Aggregate Bond Index
BMO TCH Core Plus Bond Fund	Barclays Aggregate Bond Index	Barclays U.S. Aggregate Bond Index

BMO Aggregate Bond Fund

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

mfibmo_SupplementTextBlock

BMO FUNDS

Supplement dated April 9, 2013 to the Prospectus dated December 28, 2012

IMPORTANT NOTICE ABOUT NAME CHANGE

Effective May 17, 2013, Marshall Funds, Inc. will change its corporate name to BMO Funds, Inc. The Funds have been doing business as “BMO Funds” since 2011. The individual Fund names and ticker symbols will not change. However, the CUSIP identifier for each class of shares for each Fund will change. The new CUSIP identifiers will be available online at: http://bmofundsus.com/newcusips.

Amendment of Benchmark Names

For the following Funds, the references to the benchmarks that appear in the Average Total Returns tables are amended as described below. No changes to the composition of the benchmarks have been made.

Fund	Name of Benchmark	Amended Name of Benchmark
BMO Ultra Short Tax-Free Fund	Barclays Capital 1-Year Municipal Bond Index	Barclays 1 Year Municipal Bond Index
BMO Short-Intermediate Bond Fund	Barclays Intermediate Governmental/Credit Index	Barclays U.S. Intermediate Government/Credit Bond Index
BMO Intermediate Tax-Free Fund	Barclays Capital Municipal Bond 1-15 Year Blend Index	Barclays 1-15 Year Blend Municipal Bond Index
BMO Government Income Fund	Barclays U.S. Mortgage-Backed Securities Index	Barclays U.S. MBS Index
BMO TCH Corporate Income Fund	Barclays Capital U.S. Credit Index	Barclays U.S. Credit Index
BMO Aggregate Bond Fund	Barclays Aggregate Bond Index	Barclays U.S. Aggregate Bond Index
BMO TCH Core Plus Bond Fund	Barclays Aggregate Bond Index	Barclays U.S. Aggregate Bond Index

BMO TCH Core Plus Bond Fund

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

mfibmo_SupplementTextBlock

BMO FUNDS

Supplement dated April 9, 2013 to the Prospectus dated December 28, 2012

IMPORTANT NOTICE ABOUT NAME CHANGE

Effective May 17, 2013, Marshall Funds, Inc. will change its corporate name to BMO Funds, Inc. The Funds have been doing business as “BMO Funds” since 2011. The individual Fund names and ticker symbols will not change. However, the CUSIP identifier for each class of shares for each Fund will change. The new CUSIP identifiers will be available online at: http://bmofundsus.com/newcusips.

Amendment of Benchmark Names

For the following Funds, the references to the benchmarks that appear in the Average Total Returns tables are amended as described below. No changes to the composition of the benchmarks have been made.

Fund	Name of Benchmark	Amended Name of Benchmark
BMO Ultra Short Tax-Free Fund	Barclays Capital 1-Year Municipal Bond Index	Barclays 1 Year Municipal Bond Index
BMO Short-Intermediate Bond Fund	Barclays Intermediate Governmental/Credit Index	Barclays U.S. Intermediate Government/Credit Bond Index
BMO Intermediate Tax-Free Fund	Barclays Capital Municipal Bond 1-15 Year Blend Index	Barclays 1-15 Year Blend Municipal Bond Index
BMO Government Income Fund	Barclays U.S. Mortgage-Backed Securities Index	Barclays U.S. MBS Index
BMO TCH Corporate Income Fund	Barclays Capital U.S. Credit Index	Barclays U.S. Credit Index
BMO Aggregate Bond Fund	Barclays Aggregate Bond Index	Barclays U.S. Aggregate Bond Index
BMO TCH Core Plus Bond Fund	Barclays Aggregate Bond Index	Barclays U.S. Aggregate Bond Index

BMO TCH Corporate Income Fund

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

mfibmo_SupplementTextBlock

BMO FUNDS

Supplement dated April 9, 2013 to the Prospectus dated December 28, 2012

IMPORTANT NOTICE ABOUT NAME CHANGE

Effective May 17, 2013, Marshall Funds, Inc. will change its corporate name to BMO Funds, Inc. The Funds have been doing business as “BMO Funds” since 2011. The individual Fund names and ticker symbols will not change. However, the CUSIP identifier for each class of shares for each Fund will change. The new CUSIP identifiers will be available online at: http://bmofundsus.com/newcusips.

Amendment of Benchmark Names

For the following Funds, the references to the benchmarks that appear in the Average Total Returns tables are amended as described below. No changes to the composition of the benchmarks have been made.

Fund	Name of Benchmark	Amended Name of Benchmark
BMO Ultra Short Tax-Free Fund	Barclays Capital 1-Year Municipal Bond Index	Barclays 1 Year Municipal Bond Index
BMO Short-Intermediate Bond Fund	Barclays Intermediate Governmental/Credit Index	Barclays U.S. Intermediate Government/Credit Bond Index
BMO Intermediate Tax-Free Fund	Barclays Capital Municipal Bond 1-15 Year Blend Index	Barclays 1-15 Year Blend Municipal Bond Index
BMO Government Income Fund	Barclays U.S. Mortgage-Backed Securities Index	Barclays U.S. MBS Index
BMO TCH Corporate Income Fund	Barclays Capital U.S. Credit Index	Barclays U.S. Credit Index
BMO Aggregate Bond Fund	Barclays Aggregate Bond Index	Barclays U.S. Aggregate Bond Index
BMO TCH Core Plus Bond Fund	Barclays Aggregate Bond Index	Barclays U.S. Aggregate Bond Index

BMO Ultra Short Tax-Free Fund

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

mfibmo_SupplementTextBlock

BMO FUNDS

Supplement dated April 9, 2013 to the Prospectus dated December 28, 2012

IMPORTANT NOTICE ABOUT NAME CHANGE

Effective May 17, 2013, Marshall Funds, Inc. will change its corporate name to BMO Funds, Inc. The Funds have been doing business as “BMO Funds” since 2011. The individual Fund names and ticker symbols will not change. However, the CUSIP identifier for each class of shares for each Fund will change. The new CUSIP identifiers will be available online at: http://bmofundsus.com/newcusips.

Amendment of Benchmark Names

For the following Funds, the references to the benchmarks that appear in the Average Total Returns tables are amended as described below. No changes to the composition of the benchmarks have been made.

Fund	Name of Benchmark	Amended Name of Benchmark
BMO Ultra Short Tax-Free Fund	Barclays Capital 1-Year Municipal Bond Index	Barclays 1 Year Municipal Bond Index
BMO Short-Intermediate Bond Fund	Barclays Intermediate Governmental/Credit Index	Barclays U.S. Intermediate Government/Credit Bond Index
BMO Intermediate Tax-Free Fund	Barclays Capital Municipal Bond 1-15 Year Blend Index	Barclays 1-15 Year Blend Municipal Bond Index
BMO Government Income Fund	Barclays U.S. Mortgage-Backed Securities Index	Barclays U.S. MBS Index
BMO TCH Corporate Income Fund	Barclays Capital U.S. Credit Index	Barclays U.S. Credit Index
BMO Aggregate Bond Fund	Barclays Aggregate Bond Index	Barclays U.S. Aggregate Bond Index
BMO TCH Core Plus Bond Fund	Barclays Aggregate Bond Index	Barclays U.S. Aggregate Bond Index