This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts on Class A shares of the Fund if you and members of your immediate family (that share a mailing address) agree to invest in the future at least $50,000 in any of the Columbia, Columbia Acorn or RiverSource funds (the Fund Family). More information about these and other discounts is available from your financial intermediary and under “Reductions/Waivers of Sales Charges — Front-End Sales Charge Reductions” on page S.10 of this prospectus and on page D.1 of Appendix D in the Fund’s Statement of Additional Information (SAI).

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts on Class A shares of the Fund if you and members of your immediate family (that share a mailing address) agree to invest in the future at least $50,000 in any of the Columbia, Columbia Acorn or RiverSource funds (the Fund Family). More information about these and other discounts is available from your financial intermediary and under “Reductions/Waivers of Sales Charges — Front-End Sales Charge Reductions” on page S.10 of this prospectus and on page D.1 of Appendix D in the Fund’s Statement of Additional Information (SAI).

Shareholder Fees

rr_ShareholderFeesAbstract

Annual Fund Operating Expenses

rr_OperatingExpensesAbstract

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

July 31, 2012

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Portfolio Turnover

cfst1352280_PortfolioTurnoverAltAbstract

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund’s performance. For the period from April 7, 2011 (commencement of operations) to May 31, 2011, the Fund’s portfolio turnover rate was 5% of the average value of its portfolio.

Strategy [Heading]

rr_StrategyHeading

PRINCIPAL INVESTMENT STRATEGIES OF THE FUND

Risk [Heading]

rr_RiskHeading

PRINCIPAL RISKS OF INVESTING IN THE FUND

Risk Lose Money [Text]

rr_RiskLoseMoney

Please remember that with any mutual fund investment you may lose money.

Risk Money Market Fund [Text]

rr_RiskMoneyMarketFund

Risk of Investing in Money Market Funds. In addition to the fees and expenses that the Fund directly bears, the Fund indirectly bears the fees and expenses of the affiliated money market fund in which it invests. The Fund will also be exposed to the investment risks of the affiliated money market fund.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

PAST PERFORMANCE

Performance One Year or Less [Text]

rr_PerformanceOneYearOrLess

The bar chart and past performance table are not presented because the Fund has not had a full calendar year of operations.

Shareholder Fees

rr_ShareholderFeesAbstract

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

Annual Fund Operating Expenses

rr_OperatingExpensesAbstract

Management fees

rr_ManagementFeesOverAssets

0.92%

Other expenses

rr_OtherExpensesOverAssets

7.18%

Total annual fund operating expenses

rr_ExpensesOverAssets

8.36%

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

1.47%

^[1]

Expense Example, By Year, Column [Text]

rr_ExpenseExampleByYearColumnName

Class A (whether or not shares are redeemed)

3 years

rr_ExpenseExampleYear03

2,295

10 years

rr_ExpenseExampleYear10

7,054

Shareholder Fees

rr_ShareholderFeesAbstract

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Annual Fund Operating Expenses

rr_OperatingExpensesAbstract

Management fees

rr_ManagementFeesOverAssets

0.92%

Other expenses

rr_OtherExpensesOverAssets

7.18%

Total annual fund operating expenses

rr_ExpensesOverAssets

9.11%

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

2.22%

^[1]

Expense Example, By Year, Column [Text]

rr_ExpenseExampleByYearColumnName

Class B (if shares are redeemed)

3 years

rr_ExpenseExampleYear03

2,323

10 years

rr_ExpenseExampleYear10

7,168

Expense Example, No Redemption, By Year, Column [Text]

rr_ExpenseExampleNoRedemptionByYearColumnName

Class B (if shares are not redeemed)

3 Years

rr_ExpenseExampleNoRedemptionYear03

2,023

10 years

rr_ExpenseExampleNoRedemptionYear10

7,168

Shareholder Fees

rr_ShareholderFeesAbstract

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Annual Fund Operating Expenses

rr_OperatingExpensesAbstract

Management fees

rr_ManagementFeesOverAssets

0.92%

Other expenses

rr_OtherExpensesOverAssets

7.18%

Total annual fund operating expenses

rr_ExpensesOverAssets

9.11%

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

2.22%

^[1]

Expense Example, By Year, Column [Text]

rr_ExpenseExampleByYearColumnName

Class C (if shares are redeemed)

3 years

rr_ExpenseExampleYear03

2,023

10 years

rr_ExpenseExampleYear10

7,270

Expense Example, No Redemption, By Year, Column [Text]

rr_ExpenseExampleNoRedemptionByYearColumnName

Class C (if shares are not redeemed)

3 Years

rr_ExpenseExampleNoRedemptionYear03

2,023

10 years

rr_ExpenseExampleNoRedemptionYear10

7,270

Shareholder Fees

rr_ShareholderFeesAbstract

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Annual Fund Operating Expenses

rr_OperatingExpensesAbstract

Management fees

rr_ManagementFeesOverAssets

0.92%

Other expenses

rr_OtherExpensesOverAssets

7.13%

Total annual fund operating expenses

rr_ExpensesOverAssets

8.06%

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

1.17%

^[1]

Expense Example, By Year, Column [Text]

rr_ExpenseExampleByYearColumnName

Class I (whether or not shares are redeemed)

3 years

rr_ExpenseExampleYear03

1,744

10 years

rr_ExpenseExampleYear10

6,707

Shareholder Fees

rr_ShareholderFeesAbstract

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Annual Fund Operating Expenses

rr_OperatingExpensesAbstract

Management fees

rr_ManagementFeesOverAssets

0.92%

Other expenses

rr_OtherExpensesOverAssets

7.18%

Total annual fund operating expenses

rr_ExpensesOverAssets

8.61%

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

1.72%

^[1]

Expense Example, By Year, Column [Text]

rr_ExpenseExampleByYearColumnName

Class R (whether or not shares are redeemed

3 years

rr_ExpenseExampleYear03

1,891

10 years

rr_ExpenseExampleYear10

7,010

Shareholder Fees

rr_ShareholderFeesAbstract

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Annual Fund Operating Expenses

rr_OperatingExpensesAbstract

Management fees

rr_ManagementFeesOverAssets

0.92%

Other expenses

rr_OtherExpensesOverAssets

7.18%

Total annual fund operating expenses

rr_ExpensesOverAssets

8.36%

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

1.47%

^[1]

Expense Example, By Year, Column [Text]

rr_ExpenseExampleByYearColumnName

Class W (whether or not shares are redeemed)

3 years

rr_ExpenseExampleYear03

1,824

10 years

rr_ExpenseExampleYear10

6,875

Risk/Return:

rr_RiskReturnAbstract

Objective [Heading]

rr_ObjectiveHeading

INVESTMENT OBJECTIVE

FEES AND EXPENSES OF THE FUND

cfst1352280_FundFeesAndExpensesAbstract

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold Class Z shares of the Fund.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Example

rr_ExpenseExampleAbstract

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

The Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem your shares at the end of those periods (unless otherwise noted). The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The Example includes contractual commitments to waive fees and reimburse expenses expiring as indicated in the preceding table. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

5.00%

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The Fund is a non-diversified fund that, under normal market conditions, pursues its investment objective by investing at least 80% of its net assets (including the amount of any borrowings for investment purposes), in long and short positions in sovereign debt obligations, currencies and/or interest rates of emerging market countries. The Fund may invest directly in debt of emerging market countries, including sovereign and quasi-sovereign (e.g., government agencies or instrumentalities) debt, denominated in the local or other foreign currencies or the U.S. dollar. The Fund may also invest indirectly in such debt, or invest in emerging market currencies and local market interest rates through derivatives such as credit default swaps, interest rate swaps and currency futures, options and forwards. Additionally, the Fund may invest up to 20% of its assets in positions in debt securities, currencies or interest rates of non-emerging market countries. The Fund may invest without limitation in lower quality obligations often called “junk bonds.” The Fund may count the gross notional value of its derivative transactions towards the above 80% policy. The Fund will provide shareholders with at least 60 days’ written notice of any change in the Fund’s 80% policy.

The Fund generally does not take actual ownership of foreign currencies or sell actual foreign currencies. Rather, through forward foreign currency contracts and currency futures, the Fund gains economic exposure comparable to the economic exposure that it would have if it had bought or sold the currencies directly.

The Fund may invest in fixed income securities of any maturity and does not seek to maintain a particular dollar-weighted average maturity.

Derivatives, such as futures (including currency, bond, index and interest rate futures), options (including options on currencies, interest rates and swap agreements, which are commonly referred to as swaptions) and swaps (including credit default and interest rate swaps), may also be utilized for investment purposes, for risk management (hedging) purposes, and to increase investment flexibility. Actual exposures (long and short) will vary over time.

The Fund expects to hold a significant amount of cash, money market instruments or other high quality, short-term investments to cover obligations with respect to, or that may result from, the Fund’s investments in forward foreign currency contracts, currency futures contracts or other derivatives.

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

This Fund is designed for long-term investors with above-average risk tolerance. Please remember that with any mutual fund investment you may lose money. Principal risks associated with an investment in the Fund include:

Active Management Risk. Due to its active management, the Fund could underperform other mutual funds with similar investment objectives.

Counterparty Risk. Counterparty risk is the risk that the Fund’s counterparty becomes bankrupt or otherwise fails to perform its obligations, including making payments to the Fund, and the Fund may obtain no or only limited recovery of its investments, and any recovery may be significantly delayed.

Credit Risk. Credit risk is the risk that fixed-income securities in the Fund’s portfolio will decline in price or fail to pay interest or repay principal when due because the issuer will default or otherwise become unable or unwilling to honor its financial obligations. Lower quality securities held by the Fund present increased credit risk.

Derivatives Risk. The Fund’s use of derivatives involves risks different from, and possibly greater than, the risks associated with investing directly in the investments underlying the derivatives. Derivatives may be volatile and involve significant risk, such as, among other things, correlation risk, counterparty credit risk, hedging risk, leverage risk and liquidity risk. Certain derivatives have the potential for unlimited losses, regardless of the size of the initial investment.

Derivatives Risk — Forward Foreign Currency Contracts. The Fund may enter into forward foreign currency contracts, which are types of derivative contracts whereby the Fund may agree to buy or sell a country’s currency at a specific price on a specific date, usually 30, 60, or 90 days in the future for a specific exchange rate on a given date. These contracts may, however, fall in value due to foreign market downswings or foreign currency value fluctuations. The Fund may enter into forward foreign currency contracts for investment purposes, for risk management (hedging) purposes, and to increase investment flexibility. The Fund’s investment or hedging strategies may be unable to achieve their objectives.

Derivatives Risk — Futures Contracts. The Fund may enter into futures contracts, including currency, bond, index and interest rate futures, for investment purposes, for risk management (hedging) purposes, and to increase flexibility. The volatility of futures contracts prices has been historically greater than the volatility of stocks and bonds. The liquidity of the futures markets depends on participants entering into off-setting transactions rather than making or taking delivery. To the extent participants decide to make or take delivery, liquidity in the futures market could be reduced. In addition, futures exchanges often impose a maximum permissible price movement on each futures contract for each trading session. The Fund may be disadvantaged if it is prohibited from executing a trade outside the daily permissible price movement. The Fund’s investment or hedging strategies may be unable to achieve their objectives.

Derivatives Risk — Credit Default Swaps. The Fund may enter into credit default swap agreements in an effort to buy or sell protection against a credit event, including, for example, an issuer’s failure to make timely payments of interest or principal, bankruptcy or restructuring. A credit default swap may be embedded within a structured note or other derivative instrument. Investment in credit default swaps subjects the Fund to Credit Risk, Counterparty Risk and Liquidity Risk. Credit default swaps are also subject to the risk that the Fund will not properly assess the cost of the underlying asset. If the Fund is selling credit protection, there is a risk that a credit event will occur and that the Fund will have to pay the counterparty. If the Fund is buying credit protection, there is a risk that no credit event will occur and the Fund will receive no benefit for the premium paid.

Derivatives Risk — Interest Rate Swaps. The Fund may enter into interest rate swap agreements to obtain or preserve a desired return or spread at a lower cost than through a direct investment in an instrument that yields the desired return or spread. Interest rate swaps can be based on various measures of interest rates, including LIBOR, swap rates, treasury rates and other foreign interest rates. A swap agreement can increase or decrease the volatility of the Fund’s investments and its net asset value. Swaps can involve greater risks than direct investment in securities, because swaps may be leveraged (creating Leverage Risk) and are subject to Counterparty Risk, pricing risk (i.e., swaps may be difficult to value) and Liquidity Risk (i.e., may not be possible for the Fund to liquidate a swap position at an advantageous time or price, which may result in significant losses).

Derivatives Risk — Options. The Fund may buy and sell call and put options, including options on currencies, interest rates and swap agreements (commonly referred to as swaptions), for investment purposes, for risk management (hedging) purposes, and to increase flexibility. If the Fund sells a put option, there is a risk that the Fund may be required to buy the underlying asset at a disadvantageous price. If the Fund sells a call option, there is a risk that the Fund may be required to sell the underlying asset at a disadvantageous price. If the Fund sells a call option on an underlying asset that the Fund owns (a “covered call”) and the underlying asset has increased in value when the call option is exercised, the Fund will be required to sell the underlying asset at the call price and will not be able to realize any of the underlying asset’s value above the call price. Options may be traded on a securities exchange or over-the-counter. These transactions involve risk, including correlation risk, Counterparty Risk, hedging risk and Leverage Risk.

Foreign Currency Risk. The Fund’s exposure to foreign currencies subjects the Fund to constantly changing exchange rates and the risk that those currencies will decline in value relative to the U.S. dollar, or, in the case of short positions, that the U.S. dollar will decline in value relative to the currency being sold forward. Currency rates in foreign countries may fluctuate significantly over short periods of time for a number of reasons, including changes in interest rates and economic or political developments in the U.S. or abroad. As a result, the Fund’s exposure to foreign currencies may reduce the returns of the Fund. Trading of foreign currencies also includes the risk of clearing and settling trades which, if prices are volatile, may be difficult. The Fund may also incur currency conversion costs when converting foreign currencies into U.S. dollars.

Risk of Foreign/Emerging Markets Investing. Investments in foreign securities involve certain risks not associated with investments in U.S. companies. Foreign securities in the Fund’s portfolio subject the Fund to the risks associated with investing in the particular country, including the political, regulatory, economic, social and other conditions or events occurring in the country, as well as fluctuations in its currency and the risks associated with less developed custody and settlement practices.

Investments in emerging markets may present greater risk of loss than a typical foreign security investment. Because of the less developed markets and economies and less mature governments and governmental institutions, the risks of investing in foreign securities can be significantly intensified in the case of investments in emerging markets.

Geographic Concentration Risk. The Fund may be particularly susceptible to economic, political, regulatory or other events or conditions affecting issuers and countries within the specific geographic regions in which the Fund may invest. The Fund may be more volatile than a more geographically diversified fund.

High-Yield Securities Risk. The Fund’s investments in below-investment grade fixed-income securities (i.e., high-yield or junk bonds) exposes the Fund to a greater risk of loss of principal than a fund that invests solely or primarily in investment grade securities. High-yield securities are considered to be predominantly speculative with respect to the issuer’s capacity to pay interest and repay principal.

Interest Rate Risk. Interest rate risk is the risk of losses attributable to changes in interest rates. When interest rates rise, prices of fixed-income securities generally fall. In general, the longer the maturity or duration of a fixed-income security, the greater its sensitivity to changes in interest rates. Interest rate changes also may increase prepayments of debt obligations.

Leverage Risk. Leverage occurs when the Fund increases its assets available for investment using borrowings, short sales, derivatives, or similar instruments or techniques. The use of leverage may make any change in the Fund’s net asset value (NAV) even greater and thus result in increased volatility of returns. There is no guarantee that a leveraging strategy will be successful.

Liquidity Risk. Liquidity risk is the risk associated with a lack of marketability of securities which may make it difficult to sell the security at desirable prices in order to minimize loss. The Fund may have to lower the selling price, sell other investments, or forego another, more appealing investment opportunity.

Market Risk. The market value of investments may fall or fail to rise. Market risk may affect a single issuer, sector of the economy, industry or the market as a whole. The market value of investments may fluctuate, sometimes rapidly and unpredictably.

Non-Diversification Risk. The Fund is non-diversified. A non-diversified fund may invest more of its assets in fewer issuers than if it were a diversified fund. Because each investment has a greater effect on the Fund’s performance, the Fund may be more exposed to the risks of loss and volatility than a fund that invests more broadly.

Reinvestment Risk. Reinvestment risk is the risk that the Fund will not be able to reinvest income or principal at the same rate it is currently earning.

Risk of Investing in Money Market Funds. In addition to the fees and expenses that the Fund directly bears, the Fund indirectly bears the fees and expenses of the affiliated money market fund in which it invests. The Fund will also be exposed to the investment risks of the affiliated money market fund.

Short Selling Risk. The Fund may make short sales, which involves selling a security or other asset the Fund does not own in anticipation that the instrument’s price will decline. Short positions introduce more risk to the Fund than long positions (where the Fund owns the instrument) because the maximum sustainable loss on an instrument purchased (held long) is limited to the amount paid for the instrument plus the transaction costs, whereas there is no maximum price of the shorted instrument when purchased in the open market. Therefore, in theory, securities or other assets sold short have unlimited risk. The Fund’s use of short sales in effect “leverages” the Fund, as the Fund may use the cash proceeds from short sales to invest in additional long positions. Leverage potentially exposes the Fund to greater risks of loss due to unanticipated market movements, which may magnify losses and increase the volatility of returns. In addition, the Fund will incur additional expenses by engaging in short sales in the form of transaction costs, and interest and dividend expenses paid to the lender of the instrument.

Sovereign Debt Risk. A sovereign debtor’s willingness or ability to repay principal and pay interest in a timely manner may be affected by a variety of factors, including its cash flow situation, the extent of its reserves, the availability of sufficient foreign exchange on the date a payment is due, the relative size of the debt service burden to the economy as a whole, the sovereign debtor’s policy toward international lenders, and the political constraints to which a sovereign debtor may be subject. Sovereign debt risk is increased for emerging market issuers.

Tax Risk. Internal Revenue Service regulations might treat gains from some of the Fund’s foreign currency-denominated positions as not “qualifying income” and there is a remote possibility that such regulations might be applied retroactively, in which case, the Fund might not qualify as a regulated investment company for one or more years. In the event the Treasury Department issues such regulations, the Fund’s Board of Trustees may authorize a significant change in investment strategy or the Fund’s liquidation.

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

Non-Diversification Risk. The Fund is non-diversified. A non-diversified fund may invest more of its assets in fewer issuers than if it were a diversified fund. Because each investment has a greater effect on the Fund’s performance, the Fund may be more exposed to the risks of loss and volatility than a fund that invests more broadly.

PAST PERFORMANCE

cfst1352280_FundPastPerformanceAbstract

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The bar chart and past performance table are not presented because the Fund has not had a full calendar year of operations. The Fund commenced operations on April 7, 2011. When performance is available, the Fund intends to compare its performance to the performance of the Citigroup 3-Month U.S. Treasury Bills Index and the 1 Month USD LIBOR (London Interbank Offered Rate).

Shareholder Fees Column [Text]

rr_ShareholderFeesColumnName

Class Z

Maximum deferred sales charge (load) imposed on redemptions (as a percentage of offering price at the time of purchase, or current net asset value, whichever is less)

rr_MaximumDeferredSalesChargeOverOther

none

Operating Expenses Column [Text]

rr_OperatingExpensesColumnName

Class Z

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Less: Fee waiver/expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(6.89%)

^[2]

Example

rr_ExpenseExampleAbstract

1 year

rr_ExpenseExampleYear01

124

5 years

rr_ExpenseExampleYear05

3,292

Risk/Return [Heading]

rr_RiskReturnHeading

Summary of the Fund

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

Columbia Absolute Return Enhanced Multi-Strategy Fund (the Fund) seeks to provide shareholders with positive (absolute) returns.

Expense [Heading]

rr_ExpenseHeading

FEES AND EXPENSES OF THE FUND

Expense Breakpoint Discounts

cfst1352280_ExpenseBreakpointDiscountsAbstract

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

50,000

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Example

rr_ExpenseExampleAbstract

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

The Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem your shares at the end of those periods (unless otherwise noted). The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The Example includes contractual commitments to waive fees and reimburse expenses expiring as indicated in the preceding table. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

11.00%

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The Fund pursues positive (absolute) returns through a diversified portfolio reflecting multiple asset classes and strategies employed across different markets, while seeking to limit equity market risk (commonly referred to as beta) through various investment and hedging strategies. The Fund’s investments and strategies are expected to employ both long and short positions in foreign and domestic equities (including common stock, preferred stock and convertible securities), equity futures, index futures, swaps, fixed-income securities (including sovereign and quasi-sovereign debt obligations and fixed income futures), currency forwards and futures and other commodity-related investments, and exchange-traded funds (ETFs). Actual long and short exposures will vary over time.

The Fund’s investment manager manages the Fund’s assets by employing a variety of strategies, techniques and practices that, in the aggregate, are designed to seek positive returns, with a low correlation to the performance of the broad equity markets. The investment manager may actively and frequently trade securities in the Fund’s portfolio to carry out its principal strategies.

The Fund may invest without limit in foreign investments (including currencies), which may include investments in emerging markets, and in investments that are rated below investment-grade (e.g., junk bonds) or, if unrated, deemed to be of comparable quality by the investment manager. The Fund may invest in fixed income securities of any maturity and does not seek to maintain a particular dollar-weighted average maturity.

The investment manager may use derivatives such as futures (including currency, bond, index and interest rate futures), forward foreign currency contracts, forward rate agreements and interest rate swaps, in an effort to produce incremental earnings, to hedge existing positions, to increase market exposure and investment flexibility, and/or to increase credit exposure. Futures, forwards and swaps, in particular, are expected to be utilized to gain long and short investment (or credit) exposures to securities, indexes, interest rates or currencies (in lieu of purchasing or selling a security, currency or other instrument directly).

The Fund expects to hold a significant amount of cash, money market instruments or other high quality, short-term investments to cover obligations with respect to, or that may result from, the Fund’s investments in forward foreign currency contracts, currency futures contracts, commodity-linked investments or other derivatives.

In managing the Fund, the portfolio managers allocate portions of Fund assets to be managed by investment professionals in other Columbia Management teams, including the Global Rates and Currency Sector Team, the Asset Allocation Team and the Equity Team.

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

This Fund is designed for investors with above-average risk tolerance. Please remember that with any mutual fund investment you may lose money. Principal risks associated with an investment in the Fund and the Subsidiaries are described below. (References in this section to “the Fund” also include the Subsidiaries, which shares the same risks as the Fund.)

Active Management Risk. Due to its active management, the Fund could underperform other mutual funds with similar investment objectives.

Asset Allocation Risk. The Fund’s asset and strategy allocation investment program is intended to reduce risk and volatility in the portfolio and to provide protection against a decline in the Fund’s assets. However, no assurance can be made that the investment manager’s allocation judgments will achieve these objectives.

Commodity-Related Investment Risk. The value of commodities investments will generally be affected by overall market movements and factors specific to a particular industry or commodity, which may include weather, embargoes, tariffs, and economic health, political, international regulatory and other developments. Commodities investments may also subject the Fund to Liquidity Risk and Counterparty Risk. Subsidiaries making commodity-related investments will not be subject to U.S. laws (including securities laws) and their protections. Further, they will be subject to the laws of a foreign jurisdiction, which can be adversely affected by developments in that jurisdiction.

Convertible Securities Risk. Convertible securities are subject to the usual risks associated with debt securities, such as Interest Rate Risk and Credit Risk. Convertible securities also react to changes in the value of the common stock into which they convert, and are thus subject to Market Risk. The Fund may be forced to convert a convertible security at an inopportune time, which may decrease the Fund’s return.

Counterparty Risk. Counterparty risk is the risk that the Fund’s counterparty becomes bankrupt or otherwise fails to perform its obligations, including making payments to the Fund, and the Fund may obtain no or only limited recovery of its investments, and any recovery may be significantly delayed.

Credit Risk. Credit risk is the risk that fixed-income securities in the Fund’s portfolio may or will decline in price or fail to pay interest or repay principal when due because the issuer of the security will default or otherwise become unable or unwilling to honor its financial obligations. Lower quality or unrated securities held by the Fund may present increased credit risk.

Derivatives Risk — Forward Foreign Currency Contracts. The Fund may enter into forward foreign currency contracts, which are types of derivative contracts whereby the Fund may agree to buy or sell a country’s currency at a specific price on a specific date, usually 30, 60, or 90 days in the future for a specific exchange rate on a given date. These contracts may, however, fall in value due to foreign market downswings or foreign currency value fluctuations. The Fund may enter into forward foreign currency contracts for investment purposes, for risk management (hedging) purposes, and to increase flexibility. The Fund’s investment or hedging strategies may be unable to achieve these objectives.

Derivatives Risk — Forward Rate Agreements. The Fund may enter into forward rate agreements for investment purposes, for risk management (hedging) purposes, and to increase flexibility. Under forward rate agreements, the buyer locks in an interest rate at a future settlement date. If the interest rate on the settlement date exceeds the lock rate, the buyer pays the seller the difference between the two rates. If the lock rate exceeds the interest rate on the settlement date, the seller pays the buyer the difference between the two rates. These transactions involve risks, including Counterparty Risk, hedging risk and Interest Rate Risk.

Derivatives Risk — Futures Contracts. The Fund may enter into futures contracts for investment purposes, for risk management (hedging) purposes, and to increase flexibility. The liquidity of the futures markets depends on participants entering into off-setting transactions rather than making or taking delivery. To the extent participants decide to make or take delivery, liquidity in the futures market could be reduced. In addition, futures exchanges often impose a maximum permissible price movement on each futures contract for each trading session. The Fund may be disadvantaged if it is prohibited from executing a trade outside the daily permissible price movement. The Fund’s investment or hedging strategies may be unable to achieve these objectives.

Derivatives Risk — Interest Rate Swaps. The Fund may enter into interest rate swap agreements to obtain or preserve a desired return or spread at a lower cost than through a direct investment in an instrument that yields the desired return or spread. Interest rate swaps can be based on various measures of interest rates, including LIBOR, swap rates, treasury rates and other foreign interest rates. A swap agreement can increase or decrease the volatility of the Fund’s investments and its net asset value. Swaps can involve greater risks than direct investment in securities, because swaps may be leveraged (creating Leverage Risk) and are subject to Counterparty Risk, pricing risk (i.e., swaps may be difficult to value) and Liquidity Risk (i.e., may not be possible for the Fund to liquidate a swap position at an advantageous time or price, which may result in significant losses).

Exchange-Traded Fund (ETF) Risk. ETFs are subject to, among other risks, tracking risk and passive investment risk. In addition, shareholders bear both their proportionate share of the Fund’s expenses and similar expenses incurred through ownership of the ETF.

Foreign Currency Risk. The Fund’s exposure to foreign currencies subjects the Fund to constantly changing exchange rates and the risk that those currencies will decline in value relative to the U.S. dollar, or, in the case of short positions, that the U.S. dollar will decline in value relative to the currency being sold forward. As a result, the Fund’s exposure to foreign currencies may reduce the returns of the Fund. Currency rates in foreign countries may fluctuate significantly over short periods of time for a number of reasons, including changes in interest rates and economic or political developments in the U.S. or abroad. As a result, the Fund’s exposure to foreign currencies may reduce the returns of the Funds. Trading of foreign currencies also includes the risk of clearing and settling trades which, if prices are volatile, may be difficult. The Fund may also incur currency conversion costs when converting foreign currencies into U.S. dollars.

Risk of Foreign/Emerging Markets Investing. Investments in foreign securities involve certain risks not associated with investments in U.S. companies. Foreign securities in the Fund’s portfolio subject the Fund to the risks associated with investing in the particular country, including the political, regulatory, economic, social and other conditions or events occurring in the country, as well as fluctuations in its currency and the risks associated with less developed custody and settlement practices.

Investments in emerging markets may present greater risk of loss than a typical foreign security investment. Because of the less developed markets and economies and less mature governments and governmental institutions, the risks of investing in foreign securities can be intensified in the case of investments in issuers organized, domiciled or doing business in emerging markets.

Highly Leveraged Transactions Risk. The loans and other securities in which the Fund invests may include highly leveraged transactions whereby the borrower assumes large amounts of debt in order to have the financial resources to attempt to achieve its business objectives. Loans or securities that are part of highly leveraged transactions involve a greater risk (including default and bankruptcy) than other investments.

High-Yield Securities Risk. The Fund’s investment in below-investment grade fixed-income securities (i.e., high-yield or junk bonds) exposes the Fund to a greater risk of loss of principal and income than a fund that invests solely or primarily in investment grade securities. High-yield securities are considered to be predominantly speculative with respect to the issuers capacity to pay interest and repay principal.

Inflation-Protected Securities Risk. Inflation-protected debt securities tend to react to changes in real interest rates (i.e., nominal interest rates minus the expected impact of inflation). In general, the price of such securities falls when real interest rates rise, and rises when real interest rates fall. Interest payments on these securities will vary and may be more volatile than interest paid on ordinary bonds. In periods of deflation, the Fund may have no income at all from such investments. Income earned by a shareholder depends on the amount of principal invested, and that principal will not grow with inflation unless the shareholder reinvests the portion of Fund distributions that comes from inflation adjustments.

Interest Rate Risk. Interest rate risk is the risk of losses attributable to changes in interest rates. When interest rates rise, prices of fixed-income securities generally fall. In general, the longer the maturity or duration of a fixed-income security, the greater its sensitivity to changes in interest rates. Interest rate changes also may increase prepayments of debt obligations.

Issuer Risk. An issuer may perform poorly, and therefore, the value of its securities may decline, which would negatively affect the Fund’s performance.

Leverage Risk. Leverage occurs when the Fund increases its assets available for investment using borrowings, short sales, derivatives, or similar instruments or techniques. The use of leverage may make any change in the Fund’s net asset value (NAV) even greater and thus result in increased volatility of returns. The Fund’s assets that are used as collateral to secure the short sales may decrease in value while the short positions are outstanding, which may force the Fund to use its other assets to increase the collateral. Leverage can also create an interest or other transactional expense that may lower the Fund’s overall returns. Lastly, there is no guarantee that a leveraging strategy will be successful.

Liquidity Risk. Liquidity risk is the risk associated with a lack of marketability of securities which may make it difficult to sell the security at desirable prices in order to minimize loss. The Fund may have to lower the selling price, sell other investments, or forego another, more appealing investment opportunity.

Market Risk. The market value of investments may fall or fail to rise. Market risk may affect a single issuer, sector of the economy, industry or the market as a whole. The market value of investments may fluctuate, sometimes rapidly and unpredictably.

Risk of Investing in Money Market Funds. In addition to the fees and expenses that the Fund directly bears, the Fund indirectly bears the fees and expenses of the affiliated money market fund in which it invests. The Fund will also be exposed to the investment risks of the affiliated money market fund.

Portfolio Turnover Risk. The portfolio managers may actively and frequently trade securities in the Fund’s portfolio to carry out its investment strategies. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent and active trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.

Prepayment and Extension Risk. Prepayment and extension risk is the risk that a loan, bond or other security might be called or otherwise converted, prepaid or redeemed before maturity, and the portfolio managers may not be able to invest the proceeds in securities or loans providing as high a level of income, resulting in a reduced yield to the Fund. As interest rates rise or spreads widen, the likelihood of prepayment decreases. The portfolio managers may be unable to capitalize on securities with higher interest rates or wider spreads because the Fund’s investments are locked in at a lower rate for a longer period of time.

Quantitative Model Risk. Securities or other investments selected using quantitative methods may perform differently from the market as a whole. There can be no assurance that these methodologies will enable the Fund to achieve its objective.

Regulatory Risk — Commodity Futures Trading Commission. The Fund intends to comply with Rule 4.5 of the Commodity Futures Trading Commission (CFTC), pursuant to which registered investment companies are exempt from the definition of the term “commodity pool operator,” and thus, not subject to regulation by the CFTC. However, the CFTC recently proposed significant changes in the way in which registered investment companies that invest in commodities markets are regulated. To the extent these proposals are adopted, the Fund may be compelled to consider significant changes, which could include substantially altering its investment strategies (e.g., reducing substantially the Fund’s exposure to the commodities markets) or, if deemed necessary, liquidating the Fund.

Short Selling Risk. The Fund may make short sales, which involves selling a security or other assets the Fund does not own in anticipation that its price will decline. Short positions introduce more risk to the Fund than long positions (where the Fund owns the security) because the maximum sustainable loss on a security purchased (held long) is limited to the amount paid for the security plus the transaction costs, whereas there is no maximum price of the shorted security when purchased in the open market. Therefore, in theory, securities sold short have unlimited risk. The Fund’s use of short sales in effect “leverages” the Fund, as the Fund may use the cash proceeds from short sales to invest in additional long positions (see Leverage Risk).

Sovereign Debt Risk. A sovereign debtor’s willingness or ability to repay principal and pay interest in a timely manner may be affected by a variety of factors, including its cash flow situation, the extent of its reserves, the availability of sufficient foreign exchange on the date a payment is due, the relative size of the debt service burden to the economy as a whole, the sovereign debtor’s policy toward international lenders, and the political constraints to which a sovereign debtor may be subject. Sovereign debt risk is increased for emerging market issuers.

U.S. Government Obligations Risk. U.S. Treasury obligations are backed by the “full faith and credit” of the U.S. government and generally have negligible credit risk. Securities issued or guaranteed by federal agencies or authorities and U.S. government-sponsored instrumentalities or enterprises may or may not be backed by the full faith and credit of the U.S. government. The Fund may be subject to such risk to the extent it invests in securities issued or guaranteed by federal agencies or authorities and U.S. government-sponsored instrumentalities or enterprises.

Risk Money Market Fund [Text]

rr_RiskMoneyMarketFund

Risk of Investing in Money Market Funds. In addition to the fees and expenses that the Fund directly bears, the Fund indirectly bears the fees and expenses of the affiliated money market fund in which it invests. The Fund will also be exposed to the investment risks of the affiliated money market fund.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

PAST PERFORMANCE

Performance One Year or Less [Text]

rr_PerformanceOneYearOrLess

The bar chart and past performance table are not presented because the Fund has not had a full calendar year of operations.

Shareholder Fees

rr_ShareholderFeesAbstract

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

Annual Fund Operating Expenses

rr_OperatingExpensesAbstract

Management fees

rr_ManagementFeesOverAssets

0.92%

Other expenses

rr_OtherExpensesOverAssets

3.28%

Total annual fund operating expenses

rr_ExpensesOverAssets

4.46%

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

1.48%

^[3]

Expense Example, By Year, Column [Text]

rr_ExpenseExampleByYearColumnName

Class A (whether or not shares are redeemed)

3 years

rr_ExpenseExampleYear03

1,592

10 years

rr_ExpenseExampleYear10

4,732

Shareholder Fees

rr_ShareholderFeesAbstract

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Annual Fund Operating Expenses

rr_OperatingExpensesAbstract

Management fees

rr_ManagementFeesOverAssets

0.92%

Other expenses

rr_OtherExpensesOverAssets

3.28%

Total annual fund operating expenses

rr_ExpensesOverAssets

5.21%

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

2.23%

^[3]

Expense Example, By Year, Column [Text]

rr_ExpenseExampleByYearColumnName

Class B (if shares are redeemed)

3 years

rr_ExpenseExampleYear03

1,595

10 years

rr_ExpenseExampleYear10

4,857

Expense Example, No Redemption, By Year, Column [Text]

rr_ExpenseExampleNoRedemptionByYearColumnName

Class B (if shares are not redeemed)

3 Years

rr_ExpenseExampleNoRedemptionYear03

1,295

10 years

rr_ExpenseExampleNoRedemptionYear10

4,857

Shareholder Fees

rr_ShareholderFeesAbstract

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Annual Fund Operating Expenses

rr_OperatingExpensesAbstract

Management fees

rr_ManagementFeesOverAssets

0.92%

Other expenses

rr_OtherExpensesOverAssets

3.28%

Total annual fund operating expenses

rr_ExpensesOverAssets

5.21%

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

2.23%

^[3]

Expense Example, By Year, Column [Text]

rr_ExpenseExampleByYearColumnName

Class C (if shares are redeemed)

3 years

rr_ExpenseExampleYear03

1,295

10 years

rr_ExpenseExampleYear10

5,001

Expense Example, No Redemption, By Year, Column [Text]

rr_ExpenseExampleNoRedemptionByYearColumnName

Class C (if shares are not redeemed)

3 Years

rr_ExpenseExampleNoRedemptionYear03

1,295

10 years

rr_ExpenseExampleNoRedemptionYear10

5,001

Shareholder Fees

rr_ShareholderFeesAbstract

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Annual Fund Operating Expenses

rr_OperatingExpensesAbstract

Management fees

rr_ManagementFeesOverAssets

0.92%

Other expenses

rr_OtherExpensesOverAssets

3.22%

Total annual fund operating expenses

rr_ExpensesOverAssets

4.15%

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

1.17%

^[3]

Expense Example, By Year, Column [Text]

rr_ExpenseExampleByYearColumnName

Class I (whether or not shares are redeemed)

3 years

rr_ExpenseExampleYear03

989

10 years

rr_ExpenseExampleYear10

4,152

Shareholder Fees

rr_ShareholderFeesAbstract

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Annual Fund Operating Expenses

rr_OperatingExpensesAbstract

Management fees

rr_ManagementFeesOverAssets

0.92%

Other expenses

rr_OtherExpensesOverAssets

3.28%

Total annual fund operating expenses

rr_ExpensesOverAssets

4.71%

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

1.73%

^[3]

Expense Example, By Year, Column [Text]

rr_ExpenseExampleByYearColumnName

Class R (whether or not shares are redeemed)

3 years

rr_ExpenseExampleYear03

1,152

10 years

rr_ExpenseExampleYear10

4,613

Shareholder Fees

rr_ShareholderFeesAbstract

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Annual Fund Operating Expenses

rr_OperatingExpensesAbstract

Management fees

rr_ManagementFeesOverAssets

0.92%

Other expenses

rr_OtherExpensesOverAssets

3.28%

Total annual fund operating expenses

rr_ExpensesOverAssets

4.46%

Total annual fund operating expenses after fee waiver/expense reimbursement

rr_NetExpensesOverAssets

1.48%

^[3]

Expense Example, By Year, Column [Text]

rr_ExpenseExampleByYearColumnName

Class W (whether or not shares are redeemed)

3 years

rr_ExpenseExampleYear03

1,080

10 years

rr_ExpenseExampleYear10

4,411

Risk/Return:

rr_RiskReturnAbstract

Objective [Heading]

rr_ObjectiveHeading

INVESTMENT OBJECTIVE

FEES AND EXPENSES OF THE FUND

cfst1352280_FundFeesAndExpensesAbstract

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold Class Z shares of the Fund.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Example

rr_ExpenseExampleAbstract

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

The Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The Example includes contractual commitments to waive fees and reimburse expenses expiring as indicated in the preceding table. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

11.00%

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The Fund pursues positive (absolute) returns through a diversified portfolio reflecting multiple asset classes and strategies employed across different markets, while seeking to limit equity market risk (commonly referred to as beta) through various investment and hedging strategies. The Fund’s investments and strategies are expected to employ both long and short positions in foreign and domestic equities (including common stock, preferred stock and convertible securities), equity futures, index futures, swaps, fixed-income securities (including sovereign and quasi-sovereign debt obligations and fixed income futures), currency forwards and futures and other commodity-related investments, and exchange-traded funds (ETFs). Actual long and short exposures will vary over time.

The Fund’s investment manager manages the Fund’s assets by employing a variety of strategies, techniques and practices that, in the aggregate, are designed to seek positive returns, with a low correlation to the performance of the broad equity markets. The investment manager may actively and frequently trade securities in the Fund’s portfolio to carry out its principal strategies.

The Fund may invest without limit in foreign investments (including currencies), which may include investments in emerging markets, and in investments that are rated below investment-grade (e.g., junk bonds) or, if unrated, deemed to be of comparable quality by the investment manager. The Fund may invest in fixed income securities of any maturity and does not seek to maintain a particular dollar-weighted average maturity.

The investment manager may use derivatives such as futures (including currency, bond, index and interest rate futures), forward foreign currency contracts, forward rate agreements and interest rate swaps, in an effort to produce incremental earnings, to hedge existing positions, to increase market exposure and investment flexibility, and/or to increase credit exposure. Futures, forwards and swaps, in particular, are expected to be utilized to gain long and short investment (or credit) exposures to securities, indexes, interest rates or currencies (in lieu of purchasing or selling a security, currency or other instrument directly).

The Fund expects to hold a significant amount of cash, money market instruments or other high quality, short-term investments to cover obligations with respect to, or that may result from, the Fund’s investments in forward foreign currency contracts, currency futures contracts, commodity-linked investments or other derivatives.

In managing the Fund, the portfolio managers allocate portions of Fund assets to be managed by investment professionals in other Columbia Management teams, including the Global Rates and Currency Sector Team, the Asset Allocation Team and the Equity Team.

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

This Fund is designed for investors with above-average risk tolerance. Please remember that with any mutual fund investment you may lose money. Principal risks associated with an investment in the Fund and the Subsidiaries are described below. (References in this section to “the Fund” also include the Subsidiaries, which shares the same risks as the Fund.)

Active Management Risk. Due to its active management, the Fund could underperform other mutual funds with similar investment objectives.

Asset Allocation Risk. The Fund’s asset and strategy allocation investment program is intended to reduce risk and volatility in the portfolio and to provide protection against a decline in the Fund’s assets. However, no assurance can be made that the investment manager’s allocation judgments will achieve these objectives.

Commodity-Related Investment Risk. The value of commodities investments will generally be affected by overall market movements and factors specific to a particular industry or commodity, which may include weather, embargoes, tariffs, and economic health, political, international regulatory and other developments. Commodities investments may also subject the Fund to Liquidity Risk and Counterparty Risk. Subsidiaries making commodity-related investments will not be subject to U.S. laws (including securities laws) and their protections. Further, they will be subject to the laws of a foreign jurisdiction, which can be adversely affected by developments in that jurisdiction.

Convertible Securities Risk. Convertible securities are subject to the usual risks associated with debt securities, such as Interest Rate Risk and Credit Risk. Convertible securities also react to changes in the value of the common stock into which they convert, and are thus subject to Market Risk. The Fund may be forced to convert a convertible security at an inopportune time, which may decrease the Fund’s return.

Counterparty Risk. Counterparty risk is the risk that the Fund’s counterparty becomes bankrupt or otherwise fails to perform its obligations, including making payments to the Fund, and the Fund may obtain no or only limited recovery of its investments, and any recovery may be significantly delayed.

Credit Risk. Credit risk is the risk that fixed-income securities in the Fund’s portfolio may or will decline in price or fail to pay interest or repay principal when due because the issuer of the security will default or otherwise become unable or unwilling to honor its financial obligations. Lower quality or unrated securities held by the Fund may present increased credit risk.

Derivatives Risk — Forward Foreign Currency Contracts. The Fund may enter into forward foreign currency contracts, which are types of derivative contracts whereby the Fund may agree to buy or sell a country’s currency at a specific price on a specific date, usually 30, 60, or 90 days in the future for a specific exchange rate on a given date. These contracts may, however, fall in value due to foreign market downsizing or foreign currency value fluctuations. The Fund may enter into forward foreign currency contracts for investment purposes, for risk management (hedging) purposes, and to increase flexibility. The Fund’s investment or hedging strategies may be unable to achieve these objectives.