Document and Entity Information	12 Months Ended
	Mar. 01, 2012
Risk/Return:
Document Type	Other
Document Period End Date	Oct. 31, 2011
Registrant Name	COMMERCE FUNDS
Central Index Key	0000926243
Amendment Flag	false
Document Creation Date	Jun. 21, 2012
Document Effective Date	Jun. 21, 2012
Prospectus Date	Mar. 01, 2012