Document and Entity Information	12 Months Ended
	Dec. 28, 2012
Risk/Return:
Document Type	485BPOS
Document Period End Date	Aug. 31, 2012
Registrant Name	MARSHALL FUNDS INC d/b/a BMO FUNDS
Central Index Key	0000889366
Amendment Flag	false
Document Creation Date	Dec. 27, 2012
Document Effective Date	Dec. 27, 2012
Prospectus Date	Dec. 28, 2012