497

The interactive data file included as an exhibit to this filing relates to the supplement to the prospectuses for Columbia Strategic Allocation Fund filed pursuant to Rule 497(e) under the Securities Act of 1933, as amended, on September 21, 2012 (Accession No. 0001193125-12-399438), which is incorporated herein by reference.

XML

Prospectus Supplement — September 21, 2012 to the Prospectuses, as supplemented, of the following fund:
Fund	Prospectuses Dated
Columbia Strategic Allocation Fund	1/27/2012

Effective October 1, 2012, the Average Annual Total Returns table and first paragraph following the table in the “Past Performance” section of the prospectus for Class A, Class B, Class C, Class R and Class R4 shares are hereby replaced with the following:

Average Annual Total Returns (after applicable sales charges)
(for periods ended December 31, 2011)	1 year			5 years			10 years
Columbia Strategic Allocation Fund:
Class A – before taxes		-4.41	%		-1.31	%		3.27	%
Class A – after taxes on distributions		-5.07	%		-2.24	%		2.51	%
Class A – after taxes on distributions and redemption of fund shares		-2.63	%		-1.46	%		2.47	%
Class B – before taxes		-4.29	%		-1.24	%		3.09	%
Class C – before taxes		-0.40	%		-0.90	%		3.10	%
Class R – before taxes		1.21	%		-0.38	%		3.64	%
Class R4 – before taxes		1.61	%		0.04	%		4.07	%
MSCI ACWI All Cap Index (Net) (reflects reinvested dividends net of withholding taxes but reflects no deduction for fees, expenses or other taxes)*		-7.95	%		N/A	**		N/A	**
S&P 500 Index (reflects no deduction for fees, expenses or taxes)*		2.11	%		-0.25	%		2.92	%
Barclays Global Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)*		5.64	%		6.46	%		7.16	%
Blended Index (consists of 50% MSCI ACWI All Cap Index (Net) and 50% Barclays Global Aggregate Bond Index) (reflects reinvested dividends net of withholding taxes on the MSCI ACWI All Cap Index portion of the Blended Index but reflects no deduction for fees, expenses or other taxes)*		-1.07	%		N/A	**		N/A	**
Blended Index (consists of 45% S&P 500 Index, 40% Barclays U.S. Aggregate Bond Index and 15% MSCI EAFE Index (Gross)) (reflects no deduction for fees, expenses or taxes)*		2.50	%		2.29	%		4.79	%

*   On October 1, 2012, the MSCI ACWI All Cap Index (Net) replaced the S&P 500 Index as the Fund’s primary benchmark, the Barclays Global Aggregate Bond Index became a new secondary benchmark, and the Blended Index (consisting of 50% MSCI ACWI All Cap Index (Net) and 50% Barclays Global Aggregate Bond Index) replaced the Blended Index (consisting of 45% S&P 500 Index, 40% Barclays U.S. Aggregate Bond Index and 15% MSCI EAFE Index (Gross)) as a secondary benchmark. These benchmark changes were made based on a recommendation by the Fund’s investment manager to the Fund’s Board that the new benchmarks provide a more appropriate basis for comparing the Fund’s performance. Information on the new and the old benchmarks shown will be included for a one-year transition period. Thereafter, only the new benchmarks will be included.

** Five-year and ten-year returns are not available because the inception date of the MSCI ACWI All Cap Index (Net) and the Blended Index that includes the MSCI ACWI All Cap Index (Net) is November 30, 2007.

Effective October 1, 2012, the Average Annual Total Returns table and first paragraph following the table in the “Past Performance” section of the prospectus for Class Z shares are hereby replaced with the following:

Average Annual Total Returns
(for periods ended December 31, 2011)	1 year			5 years			10 years
Columbia Strategic Allocation Fund:
Class Z – before taxes		1.79	%		-0.05	%		3.93	%
Class Z – after taxes on distributions		1.00	%		-1.02	%		3.16	%
Class Z – after taxes on distributions and redemption of fund shares		1.44	%		-0.42	%		3.05	%
MSCI ACWI All Cap Index (Net) (reflects reinvested dividends net of withholding taxes but reflects no deduction for fees, expenses or other taxes)*		-7.95	%		N/A	**		N/A	**
S&P 500 Index (reflects no deduction for fees, expenses or taxes)*		2.11	%		-0.25	%		2.92	%
Barclays Global Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)*		5.64	%		6.46	%		7.16	%
Blended Index (consists of 50% MSCI ACWI All Cap Index (Net) and 50% Barclays Global Aggregate Bond Index) (reflects reinvested dividends net of withholding taxes on the MSCI ACWI All Cap Index portion of the Blended Index but reflects no deduction for fees, expenses or other taxes)*		-1.07	%		N/A	**		N/A	**
Blended Index (consists of 45% S&P 500 Index, 40% Barclays U.S. Aggregate Bond Index and 15% MSCI EAFE Index (Gross)) (reflects no deduction for fees, expenses or taxes)*		2.50	%		2.29	%		4.79	%

*   On October 1, 2012, the MSCI ACWI All Cap Index (Net) replaced the S&P 500 Index as the Fund’s primary benchmark, the Barclays Global Aggregate Bond Index became a new secondary benchmark, and the Blended Index (consisting of 50% MSCI ACWI All Cap Index (Net) and 50% Barclays Global Aggregate Bond Index) replaced the Blended Index (consisting of 45% S&P 500 Index, 40% Barclays U.S. Aggregate Bond Index and 15% MSCI EAFE Index (Gross)) as a secondary benchmark. These benchmark changes were made based on a recommendation by the Fund’s investment manager to the Fund’s Board that the new benchmarks provide a more appropriate basis for comparing the Fund’s performance. Information on the new and the old benchmarks shown will be included for a one-year transition period. Thereafter, only the new benchmarks will be included.

** Five-year and ten-year returns are not available because the inception date of the MSCI ACWI All Cap Index (Net) and the Blended Index that includes the MSCI ACWI All Cap Index (Net) is November 30, 2007.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

Columbia Funds Series Trust II

Prospectus Date

rr_ProspectusDate

Jan. 27, 2012

Supplement [Text Block]

cfst24_SupplementTextBlock

Prospectus Supplement — September 21, 2012 to the Prospectuses, as supplemented, of the following fund:
Fund	Prospectuses Dated
Columbia Strategic Allocation Fund	1/27/2012

Effective October 1, 2012, the Average Annual Total Returns table and first paragraph following the table in the “Past Performance” section of the prospectus for Class A, Class B, Class C, Class R and Class R4 shares are hereby replaced with the following:

Average Annual Total Returns (after applicable sales charges)
(for periods ended December 31, 2011)	1 year			5 years			10 years
Columbia Strategic Allocation Fund:
Class A – before taxes		-4.41	%		-1.31	%		3.27	%
Class A – after taxes on distributions		-5.07	%		-2.24	%		2.51	%
Class A – after taxes on distributions and redemption of fund shares		-2.63	%		-1.46	%		2.47	%
Class B – before taxes		-4.29	%		-1.24	%		3.09	%
Class C – before taxes		-0.40	%		-0.90	%		3.10	%
Class R – before taxes		1.21	%		-0.38	%		3.64	%
Class R4 – before taxes		1.61	%		0.04	%		4.07	%
MSCI ACWI All Cap Index (Net) (reflects reinvested dividends net of withholding taxes but reflects no deduction for fees, expenses or other taxes)*		-7.95	%		N/A	**		N/A	**
S&P 500 Index (reflects no deduction for fees, expenses or taxes)*		2.11	%		-0.25	%		2.92	%
Barclays Global Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)*		5.64	%		6.46	%		7.16	%
Blended Index (consists of 50% MSCI ACWI All Cap Index (Net) and 50% Barclays Global Aggregate Bond Index) (reflects reinvested dividends net of withholding taxes on the MSCI ACWI All Cap Index portion of the Blended Index but reflects no deduction for fees, expenses or other taxes)*		-1.07	%		N/A	**		N/A	**
Blended Index (consists of 45% S&P 500 Index, 40% Barclays U.S. Aggregate Bond Index and 15% MSCI EAFE Index (Gross)) (reflects no deduction for fees, expenses or taxes)*		2.50	%		2.29	%		4.79	%

*   On October 1, 2012, the MSCI ACWI All Cap Index (Net) replaced the S&P 500 Index as the Fund’s primary benchmark, the Barclays Global Aggregate Bond Index became a new secondary benchmark, and the Blended Index (consisting of 50% MSCI ACWI All Cap Index (Net) and 50% Barclays Global Aggregate Bond Index) replaced the Blended Index (consisting of 45% S&P 500 Index, 40% Barclays U.S. Aggregate Bond Index and 15% MSCI EAFE Index (Gross)) as a secondary benchmark. These benchmark changes were made based on a recommendation by the Fund’s investment manager to the Fund’s Board that the new benchmarks provide a more appropriate basis for comparing the Fund’s performance. Information on the new and the old benchmarks shown will be included for a one-year transition period. Thereafter, only the new benchmarks will be included.

** Five-year and ten-year returns are not available because the inception date of the MSCI ACWI All Cap Index (Net) and the Blended Index that includes the MSCI ACWI All Cap Index (Net) is November 30, 2007.

Effective October 1, 2012, the Average Annual Total Returns table and first paragraph following the table in the “Past Performance” section of the prospectus for Class Z shares are hereby replaced with the following:

Average Annual Total Returns
(for periods ended December 31, 2011)	1 year			5 years			10 years
Columbia Strategic Allocation Fund:
Class Z – before taxes		1.79	%		-0.05	%		3.93	%
Class Z – after taxes on distributions		1.00	%		-1.02	%		3.16	%
Class Z – after taxes on distributions and redemption of fund shares		1.44	%		-0.42	%		3.05	%
MSCI ACWI All Cap Index (Net) (reflects reinvested dividends net of withholding taxes but reflects no deduction for fees, expenses or other taxes)*		-7.95	%		N/A	**		N/A	**
S&P 500 Index (reflects no deduction for fees, expenses or taxes)*		2.11	%		-0.25	%		2.92	%
Barclays Global Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)*		5.64	%		6.46	%		7.16	%
Blended Index (consists of 50% MSCI ACWI All Cap Index (Net) and 50% Barclays Global Aggregate Bond Index) (reflects reinvested dividends net of withholding taxes on the MSCI ACWI All Cap Index portion of the Blended Index but reflects no deduction for fees, expenses or other taxes)*		-1.07	%		N/A	**		N/A	**
Blended Index (consists of 45% S&P 500 Index, 40% Barclays U.S. Aggregate Bond Index and 15% MSCI EAFE Index (Gross)) (reflects no deduction for fees, expenses or taxes)*		2.50	%		2.29	%		4.79	%

*   On October 1, 2012, the MSCI ACWI All Cap Index (Net) replaced the S&P 500 Index as the Fund’s primary benchmark, the Barclays Global Aggregate Bond Index became a new secondary benchmark, and the Blended Index (consisting of 50% MSCI ACWI All Cap Index (Net) and 50% Barclays Global Aggregate Bond Index) replaced the Blended Index (consisting of 45% S&P 500 Index, 40% Barclays U.S. Aggregate Bond Index and 15% MSCI EAFE Index (Gross)) as a secondary benchmark. These benchmark changes were made based on a recommendation by the Fund’s investment manager to the Fund’s Board that the new benchmarks provide a more appropriate basis for comparing the Fund’s performance. Information on the new and the old benchmarks shown will be included for a one-year transition period. Thereafter, only the new benchmarks will be included.

** Five-year and ten-year returns are not available because the inception date of the MSCI ACWI All Cap Index (Net) and the Blended Index that includes the MSCI ACWI All Cap Index (Net) is November 30, 2007.

Class A, B, C, R, R4 Shares | Columbia Strategic Allocation Fund

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

cfst24_SupplementTextBlock

Prospectus Supplement — September 21, 2012 to the Prospectuses, as supplemented, of the following fund:
Fund	Prospectuses Dated
Columbia Strategic Allocation Fund	1/27/2012

Effective October 1, 2012, the Average Annual Total Returns table and first paragraph following the table in the “Past Performance” section of the prospectus for Class A, Class B, Class C, Class R and Class R4 shares are hereby replaced with the following:

Average Annual Total Returns (after applicable sales charges)
(for periods ended December 31, 2011)	1 year			5 years			10 years
Columbia Strategic Allocation Fund:
Class A – before taxes		-4.41	%		-1.31	%		3.27	%
Class A – after taxes on distributions		-5.07	%		-2.24	%		2.51	%
Class A – after taxes on distributions and redemption of fund shares		-2.63	%		-1.46	%		2.47	%
Class B – before taxes		-4.29	%		-1.24	%		3.09	%
Class C – before taxes		-0.40	%		-0.90	%		3.10	%
Class R – before taxes		1.21	%		-0.38	%		3.64	%
Class R4 – before taxes		1.61	%		0.04	%		4.07	%
MSCI ACWI All Cap Index (Net) (reflects reinvested dividends net of withholding taxes but reflects no deduction for fees, expenses or other taxes)*		-7.95	%		N/A	**		N/A	**
S&P 500 Index (reflects no deduction for fees, expenses or taxes)*		2.11	%		-0.25	%		2.92	%
Barclays Global Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)*		5.64	%		6.46	%		7.16	%
Blended Index (consists of 50% MSCI ACWI All Cap Index (Net) and 50% Barclays Global Aggregate Bond Index) (reflects reinvested dividends net of withholding taxes on the MSCI ACWI All Cap Index portion of the Blended Index but reflects no deduction for fees, expenses or other taxes)*		-1.07	%		N/A	**		N/A	**
Blended Index (consists of 45% S&P 500 Index, 40% Barclays U.S. Aggregate Bond Index and 15% MSCI EAFE Index (Gross)) (reflects no deduction for fees, expenses or taxes)*		2.50	%		2.29	%		4.79	%

*   On October 1, 2012, the MSCI ACWI All Cap Index (Net) replaced the S&P 500 Index as the Fund’s primary benchmark, the Barclays Global Aggregate Bond Index became a new secondary benchmark, and the Blended Index (consisting of 50% MSCI ACWI All Cap Index (Net) and 50% Barclays Global Aggregate Bond Index) replaced the Blended Index (consisting of 45% S&P 500 Index, 40% Barclays U.S. Aggregate Bond Index and 15% MSCI EAFE Index (Gross)) as a secondary benchmark. These benchmark changes were made based on a recommendation by the Fund’s investment manager to the Fund’s Board that the new benchmarks provide a more appropriate basis for comparing the Fund’s performance. Information on the new and the old benchmarks shown will be included for a one-year transition period. Thereafter, only the new benchmarks will be included.

** Five-year and ten-year returns are not available because the inception date of the MSCI ACWI All Cap Index (Net) and the Blended Index that includes the MSCI ACWI All Cap Index (Net) is November 30, 2007.

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (after applicable sales charges)

(for periods ended December 31, 2011)

Performance Table Market Index Changed

rr_PerformanceTableMarketIndexChanged

On October 1, 2012, the MSCI ACWI All Cap Index (Net) replaced the S&P 500 Index as the Fund’s primary benchmark, the Barclays Global Aggregate Bond Index became a new secondary benchmark, and the Blended Index (consisting of 50% MSCI ACWI All Cap Index (Net) and 50% Barclays Global Aggregate Bond Index) replaced the Blended Index (consisting of 45% S&P 500 Index, 40% Barclays U.S. Aggregate Bond Index and 15% MSCI EAFE Index (Gross)) as a secondary benchmark. These benchmark changes were made based on a recommendation by the Fund’s investment manager to the Fund’s Board that the new benchmarks provide a more appropriate basis for comparing the Fund’s performance. Information on the new and the old benchmarks shown will be included for a one-year transition period. Thereafter, only the new benchmarks will be included.

Class A, B, C, R, R4 Shares | Columbia Strategic Allocation Fund | Class A

Risk/Return:

rr_RiskReturnAbstract

1 year

rr_AverageAnnualReturnYear01

(4.41%)

5 years

rr_AverageAnnualReturnYear05

(1.31%)

10 years

rr_AverageAnnualReturnYear10

3.27%

Class A, B, C, R, R4 Shares | Columbia Strategic Allocation Fund | Class B

Risk/Return:

rr_RiskReturnAbstract

1 year

rr_AverageAnnualReturnYear01

(4.29%)

5 years

rr_AverageAnnualReturnYear05

(1.24%)

10 years

rr_AverageAnnualReturnYear10

3.09%

Class A, B, C, R, R4 Shares | Columbia Strategic Allocation Fund | Class C

Risk/Return:

rr_RiskReturnAbstract

1 year

rr_AverageAnnualReturnYear01

(0.40%)

5 years

rr_AverageAnnualReturnYear05

(0.90%)

10 years

rr_AverageAnnualReturnYear10

3.10%

Class A, B, C, R, R4 Shares | Columbia Strategic Allocation Fund | Class R

Risk/Return:

rr_RiskReturnAbstract

1 year

rr_AverageAnnualReturnYear01

1.21%

5 years

rr_AverageAnnualReturnYear05

(0.38%)

10 years

rr_AverageAnnualReturnYear10

3.64%

Class A, B, C, R, R4 Shares | Columbia Strategic Allocation Fund | Class R4

Risk/Return:

rr_RiskReturnAbstract

1 year

rr_AverageAnnualReturnYear01

1.61%

5 years

rr_AverageAnnualReturnYear05

0.04%

10 years

rr_AverageAnnualReturnYear10

4.07%

Class A, B, C, R, R4 Shares | Columbia Strategic Allocation Fund | after taxes on distributions | Class A

Risk/Return:

rr_RiskReturnAbstract

1 year

rr_AverageAnnualReturnYear01

(5.07%)

5 years

rr_AverageAnnualReturnYear05

(2.24%)

10 years

rr_AverageAnnualReturnYear10

2.51%

Class A, B, C, R, R4 Shares | Columbia Strategic Allocation Fund | after taxes on distributions and redemption of fund shares | Class A

Risk/Return:

rr_RiskReturnAbstract

1 year

rr_AverageAnnualReturnYear01

(2.63%)

5 years

rr_AverageAnnualReturnYear05

(1.46%)

10 years

rr_AverageAnnualReturnYear10

2.47%

Class A, B, C, R, R4 Shares | Columbia Strategic Allocation Fund | MSCI ACWI All Cap Index (Net) (reflects reinvested dividends net of withholding taxes but reflects no deduction for fees, expenses or other taxes)

Risk/Return:

rr_RiskReturnAbstract

1 year

rr_AverageAnnualReturnYear01

(7.95%)

^[1]

5 years

rr_AverageAnnualReturnYear05

^[1],[2]

10 years

rr_AverageAnnualReturnYear10

^[1],[2]

Class A, B, C, R, R4 Shares | Columbia Strategic Allocation Fund | S&P 500 Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 year

rr_AverageAnnualReturnYear01

2.11%

^[1]

5 years

rr_AverageAnnualReturnYear05

(0.25%)

^[1]

10 years

rr_AverageAnnualReturnYear10

2.92%

^[1]

Class A, B, C, R, R4 Shares | Columbia Strategic Allocation Fund | Barclays Global Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 year

rr_AverageAnnualReturnYear01

5.64%

^[1]

5 years

rr_AverageAnnualReturnYear05

6.46%

^[1]

10 years

rr_AverageAnnualReturnYear10

7.16%

^[1]

Class A, B, C, R, R4 Shares | Columbia Strategic Allocation Fund | Blended Index (consists of 50% MSCI ACWI All Cap Index (Net) and 50% Barclays Global Aggregate Bond Index) (reflects reinvested dividends net of withholding taxes on the MSCI ACWI All Cap Index portion of the Blended Index but reflects no deduction for fees, expenses or other taxes)

Risk/Return:

rr_RiskReturnAbstract

1 year

rr_AverageAnnualReturnYear01

(1.07%)

^[1]

5 years

rr_AverageAnnualReturnYear05

^[1],[2]

10 years

rr_AverageAnnualReturnYear10

^[1],[2]

Class A, B, C, R, R4 Shares | Columbia Strategic Allocation Fund | Blended Index (consists of 45% S&P 500 Index, 40% Barclays U.S. Aggregate Bond Index and 15% MSCI EAFE Index (Gross)) (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 year

rr_AverageAnnualReturnYear01

2.50%

^[1]

5 years

rr_AverageAnnualReturnYear05

2.29%

^[1]

10 years

rr_AverageAnnualReturnYear10

4.79%

^[1]

Class Z Shares | Columbia Strategic Allocation Fund

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

cfst24_SupplementTextBlock

Prospectus Supplement — September 21, 2012 to the Prospectuses, as supplemented, of the following fund:
Fund	Prospectuses Dated
Columbia Strategic Allocation Fund	1/27/2012

Effective October 1, 2012, the Average Annual Total Returns table and first paragraph following the table in the “Past Performance” section of the prospectus for Class Z shares are hereby replaced with the following:

Average Annual Total Returns
(for periods ended December 31, 2011)	1 year			5 years			10 years
Columbia Strategic Allocation Fund:
Class Z – before taxes		1.79	%		-0.05	%		3.93	%
Class Z – after taxes on distributions		1.00	%		-1.02	%		3.16	%
Class Z – after taxes on distributions and redemption of fund shares		1.44	%		-0.42	%		3.05	%
MSCI ACWI All Cap Index (Net) (reflects reinvested dividends net of withholding taxes but reflects no deduction for fees, expenses or other taxes)*		-7.95	%		N/A	**		N/A	**
S&P 500 Index (reflects no deduction for fees, expenses or taxes)*		2.11	%		-0.25	%		2.92	%
Barclays Global Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)*		5.64	%		6.46	%		7.16	%
Blended Index (consists of 50% MSCI ACWI All Cap Index (Net) and 50% Barclays Global Aggregate Bond Index) (reflects reinvested dividends net of withholding taxes on the MSCI ACWI All Cap Index portion of the Blended Index but reflects no deduction for fees, expenses or other taxes)*		-1.07	%		N/A	**		N/A	**
Blended Index (consists of 45% S&P 500 Index, 40% Barclays U.S. Aggregate Bond Index and 15% MSCI EAFE Index (Gross)) (reflects no deduction for fees, expenses or taxes)*		2.50	%		2.29	%		4.79	%

*   On October 1, 2012, the MSCI ACWI All Cap Index (Net) replaced the S&P 500 Index as the Fund’s primary benchmark, the Barclays Global Aggregate Bond Index became a new secondary benchmark, and the Blended Index (consisting of 50% MSCI ACWI All Cap Index (Net) and 50% Barclays Global Aggregate Bond Index) replaced the Blended Index (consisting of 45% S&P 500 Index, 40% Barclays U.S. Aggregate Bond Index and 15% MSCI EAFE Index (Gross)) as a secondary benchmark. These benchmark changes were made based on a recommendation by the Fund’s investment manager to the Fund’s Board that the new benchmarks provide a more appropriate basis for comparing the Fund’s performance. Information on the new and the old benchmarks shown will be included for a one-year transition period. Thereafter, only the new benchmarks will be included.

** Five-year and ten-year returns are not available because the inception date of the MSCI ACWI All Cap Index (Net) and the Blended Index that includes the MSCI ACWI All Cap Index (Net) is November 30, 2007.

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns

(for periods ended December 31, 2011)

Performance Table Market Index Changed

rr_PerformanceTableMarketIndexChanged

On October 1, 2012, the MSCI ACWI All Cap Index (Net) replaced the S&P 500 Index as the Fund’s primary benchmark, the Barclays Global Aggregate Bond Index became a new secondary benchmark, and the Blended Index (consisting of 50% MSCI ACWI All Cap Index (Net) and 50% Barclays Global Aggregate Bond Index) replaced the Blended Index (consisting of 45% S&P 500 Index, 40% Barclays U.S. Aggregate Bond Index and 15% MSCI EAFE Index (Gross)) as a secondary benchmark. These benchmark changes were made based on a recommendation by the Fund’s investment manager to the Fund’s Board that the new benchmarks provide a more appropriate basis for comparing the Fund’s performance. Information on the new and the old benchmarks shown will be included for a one-year transition period. Thereafter, only the new benchmarks will be included.

Class Z Shares | Columbia Strategic Allocation Fund | Class Z

Risk/Return:

rr_RiskReturnAbstract

1 year

rr_AverageAnnualReturnYear01

1.79%

5 years

rr_AverageAnnualReturnYear05

(0.05%)

10 years

rr_AverageAnnualReturnYear10

3.93%

Class Z Shares | Columbia Strategic Allocation Fund | after taxes on distributions | Class Z

Risk/Return:

rr_RiskReturnAbstract

1 year

rr_AverageAnnualReturnYear01

1.00%

5 years

rr_AverageAnnualReturnYear05

(1.02%)

10 years

rr_AverageAnnualReturnYear10

3.16%

Class Z Shares | Columbia Strategic Allocation Fund | after taxes on distributions and redemption of fund shares | Class Z

Risk/Return:

rr_RiskReturnAbstract

1 year

rr_AverageAnnualReturnYear01

1.44%

5 years

rr_AverageAnnualReturnYear05

(0.42%)

10 years

rr_AverageAnnualReturnYear10

3.05%

Class Z Shares | Columbia Strategic Allocation Fund | MSCI ACWI All Cap Index (Net) (reflects reinvested dividends net of withholding taxes but reflects no deduction for fees, expenses or other taxes)

Risk/Return:

rr_RiskReturnAbstract

1 year

rr_AverageAnnualReturnYear01

(7.95%)

^[1]

5 years

rr_AverageAnnualReturnYear05

^[1],[2]

10 years

rr_AverageAnnualReturnYear10

^[1],[2]

Class Z Shares | Columbia Strategic Allocation Fund | S&P 500 Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 year

rr_AverageAnnualReturnYear01

2.11%

^[1]

5 years

rr_AverageAnnualReturnYear05

(0.25%)

^[1]

10 years

rr_AverageAnnualReturnYear10

2.92%

^[1]

Class Z Shares | Columbia Strategic Allocation Fund | Barclays Global Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 year

rr_AverageAnnualReturnYear01

5.64%

^[1]

5 years

rr_AverageAnnualReturnYear05

6.46%

^[1]

10 years

rr_AverageAnnualReturnYear10

7.16%

^[1]

Class Z Shares | Columbia Strategic Allocation Fund | Blended Index (consists of 50% MSCI ACWI All Cap Index (Net) and 50% Barclays Global Aggregate Bond Index) (reflects reinvested dividends net of withholding taxes on the MSCI ACWI All Cap Index portion of the Blended Index but reflects no deduction for fees, expenses or other taxes)

Risk/Return:

rr_RiskReturnAbstract

1 year

rr_AverageAnnualReturnYear01

(1.07%)

^[1]

5 years

rr_AverageAnnualReturnYear05

^[1],[2]

10 years

rr_AverageAnnualReturnYear10

^[1],[2]

Class Z Shares | Columbia Strategic Allocation Fund | Blended Index (consists of 45% S&P 500 Index, 40% Barclays U.S. Aggregate Bond Index and 15% MSCI EAFE Index (Gross)) (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 year

rr_AverageAnnualReturnYear01

2.50%

^[1]

5 years

rr_AverageAnnualReturnYear05

2.29%

^[1]

10 years

rr_AverageAnnualReturnYear10

4.79%

^[1]

[1] On October 1, 2012, the MSCI ACWI All Cap Index (Net) replaced the S&P 500 Index as the Fund's primary benchmark, the Barclays Global Aggregate Bond Index became a new secondary benchmark, and the Blended Index (consisting of 50% MSCI ACWI All Cap Index (Net) and 50% Barclays Global Aggregate Bond Index) replaced the Blended Index (consisting of 45% S&P 500 Index, 40% Barclays U.S. Aggregate Bond Index and 15% MSCI EAFE Index (Gross)) as a secondary benchmark. These benchmark changes were made based on a recommendation by the Fund's investment manager to the Fund's Board that the new benchmarks provide a more appropriate basis for comparing the Fund's performance. Information on the new and the old benchmarks shown will be included for a one-year transition period. Thereafter, only the new benchmarks will be included.

[2] Five-year and ten-year returns are not available because the inception date of the MSCI ACWI All Cap Index (Net) and the Blended Index that includes the MSCI ACWI All Cap Index (Net) is November 30, 2007.

XML

Document and Entity Information	12 Months Ended
	Jan. 27, 2012
Risk/Return:
Document Type	Other
Document Period End Date	Sep. 30, 2011
Registrant Name	Columbia Funds Series Trust II
Central Index Key	0001352280
Amendment Flag	false
Document Creation Date	Sep. 21, 2012
Document Effective Date	Sep. 21, 2012
Prospectus Date	Jan. 27, 2012

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	Columbia Funds Series Trust II
Prospectus Date	rr_ProspectusDate	Jan. 27, 2012
Document Creation Date	dei_DocumentCreationDate	Sep. 21, 2012