Shareholder Fees	0 Months Ended
	May 01, 2012
(Columbia Acorn Fund A,C & I) | (Columbia Acorn Fund) | Class A Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price	5.75%
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	1.00%	[1]
(Columbia Acorn Fund A,C & I) | (Columbia Acorn Fund) | Class C Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	1.00%	[2]
(Columbia Acorn Fund A,C & I) | (Columbia Acorn Fund) | Class I Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value
(Columbia Acorn Fund B) | (Columbia Acorn Fund) | Class B Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	5.00%	[3]
(Columbia Acorn Fund Z) | (Columbia Acorn Fund) | Class Z Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price	none
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	none
(Columbia Acorn International A,C,I,R & R5) | (Columbia Acorn International) | Class A Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price	5.75%
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	1.00%	[1]
(Columbia Acorn International A,C,I,R & R5) | (Columbia Acorn International) | Class C Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	1.00%	[2]
(Columbia Acorn International A,C,I,R & R5) | (Columbia Acorn International) | Class I Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value
(Columbia Acorn International A,C,I,R & R5) | (Columbia Acorn International) | Class R Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value
(Columbia Acorn International A,C,I,R & R5) | (Columbia Acorn International) | Class R5 Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value
(Columbia Acorn International B) | (Columbia Acorn International) | Class B Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	5.00%	[3]
(Columbia Acorn International Z) | (Columbia Acorn International) | Class Z Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price	none
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	none
(Columbia Acorn USA A,C & I) | (Columbia Acorn USA) | Class A Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price	5.75%
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	1.00%	[1]
(Columbia Acorn USA A,C & I) | (Columbia Acorn USA) | Class C Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	1.00%	[2]
(Columbia Acorn USA A,C & I) | (Columbia Acorn USA) | Class I Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value
(Columbia Acorn USA B) | (Columbia Acorn USA) | Class B Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	5.00%	[3]
(Columbia Acorn USA Z) | (Columbia Acorn USA) | Class Z Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price	none
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	none
(Columbia Acorn Select A,C & I) | (Columbia Acorn Select) | Class A Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price	5.75%
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	1.00%	[1]
(Columbia Acorn Select A,C & I) | (Columbia Acorn Select) | Class C Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	1.00%	[2]
(Columbia Acorn Select A,C & I) | (Columbia Acorn Select) | Class I Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value
(Columbia Acorn Select B) | (Columbia Acorn Select) | Class B Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	5.00%	[3]
(Columbia Acorn Select Z) | (Columbia Acorn Select) | Class Z Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price	none
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	none
(Columbia Acorn International Select A,C & I) | (Columbia Acorn International Select) | Class A Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price	5.75%
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	1.00%	[1]
(Columbia Acorn International Select A,C & I) | (Columbia Acorn International Select) | Class C Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	1.00%	[2]
(Columbia Acorn International Select A,C & I) | (Columbia Acorn International Select) | Class I Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value
(Columbia Acorn International Select B) | (Columbia Acorn International Select) | Class B Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	5.00%	[3]
(Columbia Acorn International Select Z) | (Columbia Acorn International Select) | Class Z Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price	none
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	none
(Columbia Thermostat Fund A&C) | (Columbia Thermostat Fund) | Class A Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price	5.75%
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	1.00%	[1]
(Columbia Thermostat Fund A&C) | (Columbia Thermostat Fund) | Class C Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	1.00%	[2]
(Columbia Thermostat Fund B) | (Columbia Thermostat Fund) | Class B Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	5.00%	[3]
(Columbia Thermostat Fund Z) | (Columbia Thermostat Fund) | Class Z Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price	none
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	none
(Columbia Acorn European Fund A,C & I) | (Columbia Acorn European Fund) | Class A Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price	5.75%
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	1.00%	[1]
(Columbia Acorn European Fund A,C & I) | (Columbia Acorn European Fund) | Class C Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	1.00%	[2]
(Columbia Acorn European Fund A,C & I) | (Columbia Acorn European Fund) | Class I Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value
(Columbia Acorn European Fund Z) | (Columbia Acorn European Fund) | Class Z Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price	none
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	none
(Columbia Acorn Emerging Markets Fund A,C & I) | (Columbia Acorn Emerging Markets Fund) | Class A Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price	5.75%
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	1.00%	[1]
(Columbia Acorn Emerging Markets Fund A,C & I) | (Columbia Acorn Emerging Markets Fund) | Class C Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	1.00%	[2]
(Columbia Acorn Emerging Markets Fund A,C & I) | (Columbia Acorn Emerging Markets Fund) | Class I Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value
(Columbia Acorn Emerging Markets Fund Z) | (Columbia Acorn Emerging Markets Fund) | Class Z Shares
Shareholder Fees:
Maximum sales charge (load) imposed on purchases, as a % of offering price	none
Maximum deferred sales charge (load) imposed on redemptions, as a % of the lower of the original purchase price or net asset value	none

[1] Contingent deferred sales charges (CDSC) on certain investments of between $1 million and $50 million redeemed within 18 months of purchase, charged as follows: 1.00% CDSC if redeemed within 12 months of purchase, and 0.50% CDSC if redeemed more than 12, but less than 18, months of purchase, with certain limited exceptions.

[2] This charge applies to investors who buy Class C shares and redeem them within one year of purchase, with certain limited exceptions.

[3] This charge decreases over time. See About Class B Shares - Sales Charges and Commissions for details.