Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	RUSSELL INVESTMENT CO
Prospectus Date	rr_ProspectusDate	Mar. 01, 2013
2040 Strategy Fund
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	2040 STRATEGY FUND
Objective [Heading]	rr_ObjectiveHeading	Investment Objective
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The Fund seeks to provide capital growth and income consistent with its current asset allocation which will change over time, with an increasing allocation to fixed income funds.
Expense [Heading]	rr_ExpenseHeading	Fees and Expenses of the Fund
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	The following tables describe the fees and expenses that you may pay if you buy and hold Shares of the Fund. Please see the Expense Notes section of the Fund’s Prospectus for further information regarding expenses of the Fund.                You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Russell Funds. More information about these and other discounts is available from your financial professional and in the Front-End Sales Charges section and the More About Deferred Sales Charges section, beginning on pages 148 and 151, respectively of the Prospectus, and the Purchase, Exchange and Redemption of Fund Shares section, beginning on page 23 of the Fund’s Statement of Additional Information.
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)
Portfolio Turnover [Heading]	rr_PortfolioTurnoverHeading	Portfolio Turnover
Portfolio Turnover [Text Block]	rr_PortfolioTurnoverTextBlock	The Fund pays no transaction costs or commissions when it buys and sells Shares of the Underlying Funds. The Underlying Funds pay transaction costs, such as commissions, when they buy and sell securities (or “turn over” their portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs affect the Underlying Funds’ performance. Portfolio turnover rates for the Underlying Funds are available in the Prospectus for the Underlying Funds.
Expense Breakpoint Discounts [Text]	rr_ExpenseBreakpointDiscounts	You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Russell Funds.
Expense Breakpoint, Minimum Investment Required [Amount]	rr_ExpenseBreakpointMinimumInvestmentRequiredAmount	50,000
Expenses Restated to Reflect Current [Text]	rr_ExpensesRestatedToReflectCurrent	“Total Annual Fund Operating Expenses” have been restated to reflect the proportionate share of the expenses of the Underlying Funds in which the Fund invests.
Expense Example [Heading]	rr_ExpenseExampleHeading	Example
Expense Example Narrative [Text Block]	rr_ExpenseExampleNarrativeTextBlock	This 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 all of your Shares at the end of those periods. The example also assumes your investment has a 5% return each year and that operating expenses remain the same.                Although your actual costs may be higher or lower, under these assumptions your costs would be:
Strategy [Heading]	rr_StrategyHeading	Investments, Risks and Performance Principal Investment Strategies of the Fund
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	The Fund is a "fund of funds" and invests only in the Shares of other Russell Investment Company ("RIC") Funds (the "Underlying Funds"). The Fund is designed for investors who plan to retire close to 2040. The Fund seeks to achieve its investment objective by investing in Shares of the Underlying Funds which represent various asset classes. The allocation of the Fund's assets to the Underlying Funds in which it invests will become more conservative over time until approximately 2040, at which time the allocation will remain fixed. The Fund's approximate target allocation as of March 1, 2013 is 79% to equity Underlying Funds, 10% to fixed income Underlying Funds and 11% to alternative Underlying Funds. As a result of its investments in the Underlying Funds, the Fund indirectly invests principally in U.S. and non-U.S. equity and fixed income securities and derivatives. Alternative Underlying Funds pursue investment strategies that differ from those of traditional broad market equity or fixed income funds or that seek returns with a low correlation to global equity markets. The following chart illustrates how the target asset allocation for the Fund becomes more conservative over time. The Fund intends to change its allocation to the Underlying Funds in which it invests once a year, typically near year end. At approximately 2040, the target allocation of the Fund to the Underlying Funds will be fixed. After that time the Fund may, depending on the facts and circumstances and contingent upon Board approval, continue to operate, be merged into the In Retirement Fund or another fund, or be liquidated.                Russell Investment Management Company ("RIMCo"), the Fund's investment adviser, may modify the target asset allocation for the Fund, including changes to Underlying Funds in which the Fund invests, from time to time based on strategic capital markets research or on factors such as RIMCo's outlook for the economy, financial markets generally and/or relative market valuation of the asset classes represented by each Underlying Fund. In the future, the Fund may also invest in other RIC Underlying Funds. Modifications in the asset allocation or changes to the Underlying Funds will be based on strategic, long-term allocation decisions and not on tactical, short-term positioning and may be made one or more times per year. The Underlying Funds employ a multi-manager approach whereby most assets of the Underlying Funds are allocated to different unaffiliated money managers.                A Fund whose stated target year is further away invests a greater portion of its assets in equity and alternative Underlying Funds which RIMCo believes provide a greater opportunity for capital appreciation over the long-term with a corresponding higher risk of a decline in the value of your investment. A Fund whose stated target year is closer invests a greater portion of its assets in fixed income Underlying Funds which RIMCo believes offers reduced risk and price volatility, and, accordingly lower expected returns. However, when a Fund reaches its target year, it will continue to have a substantial portion of its assets invested in equity and alternative Underlying Funds.                Please refer to the "Investment Objective and Investment Strategies" section in the Fund's Prospectus for further information.
Risk [Heading]	rr_RiskHeading	Principal Risks of Investing in the Fund
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	An investment in the Fund, like any investment, has risks. The value of the Fund fluctuates and you could lose money. The principal risks of investing in the Fund are those associated with: Investing in Affiliated Underlying Funds. The assets of the Fund are invested principally in Shares of the Underlying Funds, and the investment performance of the Fund is directly related to the investment performance of the Underlying Funds in which it invests. RIMCo is the investment adviser for both the Fund and the Underlying Funds and may be deemed to have a conflict of interest in determining the allocation of the Fund to the Underlying Funds. Asset Allocation. Neither the Fund nor RIMCo can offer any assurance that the asset allocation of the Fund will either maximize returns or minimize risks. Nor can the Fund or RIMCo offer assurance that a recommended allocation will be the appropriate allocation in all circumstances for every investor with a particular time horizon or that the recommended asset allocation will meet an investor's retirement savings goals.                The Fund is exposed to the same risks as the Underlying Funds in direct proportion to the allocation of its assets among the Underlying Funds. The following are the principal risks associated with investing in the Underlying Funds which are also principal risks of investing in the Fund as a result of its investment in the Underlying Funds: Active Management. Despite strategies designed to achieve the Underlying Fund's investment objective, the value of investments will change with market conditions, and so will the value of any investment in the Underlying Fund and you could lose money. The securities selected for the portfolio may not perform as RIMCo or the Underlying Fund's money managers expect. Additionally, securities selected may cause an Underlying Fund to underperform relative to other funds with similar investment objectives and strategies. There is no guarantee that RIMCo will effectively assess an Underlying Fund's characteristics or exposures and it is possible that its judgments regarding an Underlying Fund's risk/return profile may prove incorrect. In addition, actions taken to modify overall portfolio characteristics, including risk, may be ineffective and/or cause the Underlying Fund to underperform. Multi-Manager Approach. While the investment styles employed by the money managers are intended to be complementary, they may not in fact be complementary. A multi-manager approach could result in more exposure to certain types of securities and higher portfolio turnover. Equity Securities. The value of equity securities will rise and fall in response to the activities of the company that issued them, general market conditions and/or economic conditions. Investments in small and medium capitalization companies may involve greater risks because these companies generally have narrower markets, more limited managerial and financial resources and a less diversified product offering than larger, more established companies. Small and some medium capitalization stocks may also be thinly traded, and thus, difficult to buy and sell in the market. Investments in preferred stocks are subject to the risks of common stocks, as well as the risk that interest rates will rise and make the fixed dividend feature, if any, less appealing to investors resulting in a decline in price. In rising markets, defensive stocks are likely to underperform growth, value and dynamic stocks and the relative performance of stocks selected pursuant to a defensive style may fluctuate over time. Dynamic stocks have higher than average stock price volatility and may experience sharp declines in value. Fixed Income Securities. Prices of fixed income securities generally rise and fall in response to, among other things, interest rate changes. The Underlying Fund could lose money if the issuer or guarantor of a fixed income security or other issuer of credit support is unable or unwilling to make timely principal and/or interest payments, or to otherwise honor its obligations. In addition, fixed income securities may be downgraded in credit rating or go into default. Non-Investment Grade Debt Securities ("High Yield" or "Junk Bonds"). Non-investment grade debt securities involve higher volatility and higher risk of default than investment grade bonds. U.S. and Non-U.S. Corporate Debt Securities Risk. Investments in U.S. and non-U.S. corporate debt securities are subject to interest rate risk and market risk, and are affected by perceptions of the creditworthiness and business prospects of individual issuers. Non-U.S. corporate debt securities may expose the Underlying Fund to greater risk than investments in U.S. corporate debt securities. Government Issued or Guaranteed Securities, U.S. Government Securities. Bonds issued or guaranteed by a government are subject to inflation risk, price depreciation risk and default risk. Money Market Securities (Including Commercial Paper). Prices of money market securities generally rise and fall in response to interest rate changes. Asset-Backed Commercial Paper. Investment in asset-backed commercial paper is subject to the risk that insufficient proceeds from the projected cash flows of the contributed receivables are available to repay the commercial paper. Mortgage-Backed Securities. Mortgage-backed securities may be affected by, among other things, changes or perceived changes in interest rates, factors concerning the interests in and structure of the issuer or the originator of the mortgage, or the quality of the underlying assets. The underlying assets may default or decline in quality or value. Asset-Backed Securities. Payment of principal and interest on asset-backed securities may be largely dependent upon the cash flows generated by the assets backing the securities and asset-backed securities may not have the benefit of any security interest in the related assets. Loans and Other Direct Indebtedness. Loans and other direct indebtedness involve the risk that payment of principal, interest and other amounts due in connection with these investments may not be received. Repurchase Agreements. Repurchase agreements are subject to the risk that the sellers may not be able to pay the agreed-upon repurchase price on the repurchase date. Non-U.S. and Emerging Markets Securities. Non-U.S. securities have risks relating to political, economic and regulatory conditions in foreign countries. The risks associated with non-U.S. securities may be amplified for emerging markets securities. Currency Risk. Non-U.S. securities that trade in, and receive revenues in, non-U.S. currencies are subject to the risk that those currencies will decline in value relative to the U.S. dollar or, in the case of hedging positions, that the U.S. dollar will decline in value relative to the currency being hedged. As a result, investments in non-U.S. dollar-denominated securities and currencies may reduce the returns of the Fund. Currency Trading Risk. Currency trading strategies may involve instruments that have volatile prices, are illiquid or create economic leverage. Forward currency contracts are subject to the risk that should forward prices increase, a loss will be incurred to the extent that the price of the currency agreed to be purchased exceeds the price of the currency agreed to be sold. Derivatives. Investments in a derivative instrument could lose more than the principal amount invested. Compared to conventional securities, derivatives can be more sensitive to changes in interest rates or to sudden fluctuations in market prices and thus the Underlying Fund's losses may be greater if it invests in derivatives than if it invests only in conventional securities. The use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in equity or fixed income securities, currencies or other investments. Derivatives are subject to a number of risks such as liquidity risk, market risk, credit risk, default risk, counterparty risk (the risk that the other party in an agreement will fail to perform its obligations) and management risk. They also involve the risk of mispricing or improper valuation and the risk that changes in the value of the derivative may not correlate exactly with the change in the value of the underlying asset, rate or index. Credit Default Swaps. Credit default swap agreements may involve greater risks than if the Underlying Fund had invested in the reference obligation directly since, in addition to risks relating to the reference obligation, credit default swaps are subject to illiquidity risk and counterparty risk. Short Sales Risk. A short sale will result in a loss if the price of the security sold short increases between the date of the short sale and the date on which the borrowed security must be returned. Short sales may give rise to a form of leverage. Leverage tends to exaggerate the effect of any increase or decrease in the value of portfolio securities. Short sales have the potential for unlimited loss. Real Estate Securities. Just as real estate values go up and down, the value of the securities of companies involved in the industry also fluctuates. Real estate securities, including REITs, may be affected by changes in the value of the underlying properties owned by the companies and by the quality of tenants' credit. American Depositary Receipts (ADRs) or Global Depositary Receipts (GDRs). ADRs and GDRs have the same currency and economic risks as the underlying non-U.S. shares they represent. They are affected by the risks associated with non-U.S. securities, such as changes in political or economic conditions of other countries and changes in the exchange rates of foreign currencies. Commodity Risk. Exposure to the commodities markets may subject the Underlying Fund to greater volatility than investments in traditional securities, particularly if the investments involve leverage. The value of commodity-linked derivative instruments may be affected by changes in overall market movements, commodity index volatility, changes in interest rates or sectors affecting a particular industry or commodity and international economic, political and regulatory developments. The use of leveraged commodity-linked derivatives creates an opportunity for increased return, but also creates the possibility for a greater loss. Bank Obligations. The banking industry may be particularly susceptible to certain economic factors such as interest rate changes, adverse developments in the real estate market, fiscal and monetary policy and general economic cycles. The banking industry may also be impacted by legal and regulatory developments. Liquidity Risk. The market for certain investments may become illiquid under adverse or volatile market or economic conditions, making those investments difficult to sell. The market price of certain investments may fall dramatically if there is no liquid trading market. Large Redemptions. The Underlying Funds are used as investments for certain funds of funds and in asset allocation programs and may have a large percentage of their Shares owned by such funds or held in such programs. Large redemption activity could result in the Underlying Fund incurring additional costs and being forced to sell portfolio securities at a loss to meet redemptions. Global Financial Markets Risk. Global economies and financial markets are becoming increasingly interconnected and conditions (including recent volatility and instability) and events (including natural disasters) in one country, region or financial market may adversely impact issuers in a different country, region or financial market. In addition, governmental and quasi-governmental organizations have taken a number of unprecedented actions designed to support the markets. Such events and conditions may adversely affect the value of the Underlying Fund's securities, result in greater market or liquidity risk or cause difficulty valuing the Underlying Fund's portfolio instruments or achieving the Underlying Fund's objective.                An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.                The officers and Trustees of the Fund currently serve as officers and Trustees of the Underlying Funds. RIMCo presently serves as investment manager of the Fund and Underlying Funds. Therefore, conflicts may arise as those persons and RIMCo fulfill their fiduciary responsibilities to the Fund and to the Underlying Funds.                Please refer to the "Risks" section in the Fund's Prospectus for further information.
Risk Lose Money [Text]	rr_RiskLoseMoney	An investment in the Fund, like any investment, has risks. The value of the Fund fluctuates and you could lose money.
Risk Not Insured Depository Institution [Text]	rr_RiskNotInsuredDepositoryInstitution	An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	Performance
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The following bar chart illustrates the risks of investing in the Fund by showing how the performance of the Fund’s Class S Shares varies over a ten year period (or if the Fund has not been in operation for 10 years, since the beginning of the Fund’s operations).
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	www.russell.com
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	Past performance, both before-tax and after-tax, is no indication of future results.
Bar Chart [Heading]	rr_BarChartHeading	Class S Calendar Year Total Returns
Bar Chart Narrative [Text Block]	rr_BarChartNarrativeTextBlock	The following bar chart illustrates the risks of investing in the Fund by showing how the performance of the Fund’s Class S Shares varies over a ten year period (or if the Fund has not been in operation for 10 years, since the beginning of the Fund’s operations). The returns (both before and after tax) for other Classes of Shares offered by this Prospectus may be lower than the Class S returns shown in the bar chart, depending upon the fees and expenses of that Class. The highest and lowest returns for a full quarter during the periods shown in the bar chart are set forth next to the bar chart.
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Highest Quarterly Return: 19.26% (2Q/09) Lowest Quarterly Return: (22.52)% (4Q/08)
Performance Table Heading	rr_PerformanceTableHeading	Average annual total returns for the periods ended December 31, 2012
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred	rr_PerformanceTableNotRelevantToTaxDeferred	After-tax returns are not relevant to investors who hold their Shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
Performance Table One Class of after Tax Shown [Text]	rr_PerformanceTableOneClassOfAfterTaxShown	After-tax returns are shown for only one Class. The after-tax returns for other Classes will vary.
Performance Table Explanation after Tax Higher	rr_PerformanceTableExplanationAfterTaxHigher	If the Fund has realized capital losses, the total return after taxes on distributions and sale of Fund Shares may be higher than the total return before taxes and the total return after taxes on distributions.
Performance Table Narrative	rr_PerformanceTableNarrativeTextBlock	The table accompanying the bar chart further illustrates the risks of investing in the Fund by showing how the Fund’s average annual returns for the periods shown compare with the returns of one or more indexes that measure broad market performance. After-tax returns are shown for only one Class. The after-tax returns for other Classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their Shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. If the Fund has realized capital losses, the total return after taxes on distributions and sale of Fund Shares may be higher than the total return before taxes and the total return after taxes on distributions. For more information, see the Performance Notes section in the Fund’s Prospectus.                Past performance, both before-tax and after-tax, is no indication of future results. More current performance information is available at www.russell.com.
2040 Strategy Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	5.75%	[1]
Maximum Deferred Sales Charge (Load)	rr_MaximumDeferredSalesChargeOverOther	1.00%	[1],[2]
Maximum Sales Charge (Load) Imposed on Reinvested Dividends	rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none	[1]
Advisory Fee	rr_ManagementFeesOverAssets	none	[3]
Distribution (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.25%	[3]
Other Expenses (Shareholder Services Fees)	rr_OtherExpensesOverAssets	none	[3]
Acquired (Underlying) Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.86%	[3]
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.11%	[3]
1 Year	rr_ExpenseExampleYear01	682
3 Years	rr_ExpenseExampleYear03	907
5 Years	rr_ExpenseExampleYear05	1,151
10 Years	rr_ExpenseExampleYear10	1,849
1 Year	rr_AverageAnnualReturnYear01	8.21%
5 Years	rr_AverageAnnualReturnYear05	(1.50%)
Since Inception	rr_AverageAnnualReturnSinceInception	2.77%
2040 Strategy Fund | Class E
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load)	rr_MaximumDeferredSalesChargeOverOther	none	[2]
Maximum Sales Charge (Load) Imposed on Reinvested Dividends	rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Advisory Fee	rr_ManagementFeesOverAssets	none	[3]
Distribution (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none	[3]
Other Expenses (Shareholder Services Fees)	rr_OtherExpensesOverAssets	0.25%	[3]
Acquired (Underlying) Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.86%	[3]
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.11%	[3]
1 Year	rr_ExpenseExampleYear01	113
3 Years	rr_ExpenseExampleYear03	353
5 Years	rr_ExpenseExampleYear05	611
10 Years	rr_ExpenseExampleYear10	1,351
1 Year	rr_AverageAnnualReturnYear01	14.79%
5 Years	rr_AverageAnnualReturnYear05	(0.35%)
Since Inception	rr_AverageAnnualReturnSinceInception	3.53%
2040 Strategy Fund | Class R1
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load)	rr_MaximumDeferredSalesChargeOverOther	none	[2]
Maximum Sales Charge (Load) Imposed on Reinvested Dividends	rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Advisory Fee	rr_ManagementFeesOverAssets	none	[3]
Distribution (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none	[3]
Other Expenses (Shareholder Services Fees)	rr_OtherExpensesOverAssets	none	[3]
Acquired (Underlying) Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.86%	[3]
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	0.86%	[3]
1 Year	rr_ExpenseExampleYear01	88
3 Years	rr_ExpenseExampleYear03	274
5 Years	rr_ExpenseExampleYear05	477
10 Years	rr_ExpenseExampleYear10	1,060
1 Year	rr_AverageAnnualReturnYear01	15.11%
5 Years	rr_AverageAnnualReturnYear05	(0.09%)
Since Inception	rr_AverageAnnualReturnSinceInception	3.80%
2040 Strategy Fund | Class R2
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load)	rr_MaximumDeferredSalesChargeOverOther	none	[2]
Maximum Sales Charge (Load) Imposed on Reinvested Dividends	rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Advisory Fee	rr_ManagementFeesOverAssets	none	[3]
Distribution (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none	[3]
Other Expenses (Shareholder Services Fees)	rr_OtherExpensesOverAssets	0.25%	[3]
Acquired (Underlying) Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.86%	[3]
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.11%	[3]
1 Year	rr_ExpenseExampleYear01	113
3 Years	rr_ExpenseExampleYear03	353
5 Years	rr_ExpenseExampleYear05	611
10 Years	rr_ExpenseExampleYear10	1,351
1 Year	rr_AverageAnnualReturnYear01	14.73%
5 Years	rr_AverageAnnualReturnYear05	(0.34%)
Since Inception	rr_AverageAnnualReturnSinceInception	3.54%
2040 Strategy Fund | Class R3
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load)	rr_MaximumDeferredSalesChargeOverOther	none	[2]
Maximum Sales Charge (Load) Imposed on Reinvested Dividends	rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Advisory Fee	rr_ManagementFeesOverAssets	none	[3]
Distribution (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.25%	[3]
Other Expenses (Shareholder Services Fees)	rr_OtherExpensesOverAssets	0.25%	[3]
Acquired (Underlying) Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.86%	[3]
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.36%	[3]
1 Year	rr_ExpenseExampleYear01	138
3 Years	rr_ExpenseExampleYear03	431
5 Years	rr_ExpenseExampleYear05	745
10 Years	rr_ExpenseExampleYear10	1,635
1 Year	rr_AverageAnnualReturnYear01	14.57%
5 Years	rr_AverageAnnualReturnYear05	(0.58%)
Since Inception	rr_AverageAnnualReturnSinceInception	3.28%
2040 Strategy Fund | Class S
Risk/Return:	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load)	rr_MaximumDeferredSalesChargeOverOther	none	[2]
Maximum Sales Charge (Load) Imposed on Reinvested Dividends	rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther	none
Advisory Fee	rr_ManagementFeesOverAssets	none	[3]
Distribution (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none	[3]
Other Expenses (Shareholder Services Fees)	rr_OtherExpensesOverAssets	none	[3]
Acquired (Underlying) Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.86%	[3]
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	0.86%	[3]
1 Year	rr_ExpenseExampleYear01	88
3 Years	rr_ExpenseExampleYear03	274
5 Years	rr_ExpenseExampleYear05	477
10 Years	rr_ExpenseExampleYear10	1,060
2005	rr_AnnualReturn2005	8.02%
2006	rr_AnnualReturn2006	16.77%
2007	rr_AnnualReturn2007	7.33%
2008	rr_AnnualReturn2008	(39.40%)
2009	rr_AnnualReturn2009	30.66%
2010	rr_AnnualReturn2010	15.23%
2011	rr_AnnualReturn2011	(5.19%)
2012	rr_AnnualReturn2012	15.11%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Highest Quarterly Return:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	19.26%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Lowest Quarterly Return:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(22.52%)
1 Year	rr_AverageAnnualReturnYear01	15.11%
5 Years	rr_AverageAnnualReturnYear05	(0.09%)
Since Inception	rr_AverageAnnualReturnSinceInception	3.80%
2040 Strategy Fund | Return After Taxes on Distributions | Class S
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	14.65%
5 Years	rr_AverageAnnualReturnYear05	(0.55%)
Since Inception	rr_AverageAnnualReturnSinceInception	3.11%
2040 Strategy Fund | Return After Taxes on Distributions and Sale of Fund Shares | Class S
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	10.14%
5 Years	rr_AverageAnnualReturnYear05	(0.29%)
Since Inception	rr_AverageAnnualReturnSinceInception	2.96%
2040 Strategy Fund | Russell 1000® Index (reflects no deduction for fees, expenses or taxes)
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	16.42%
5 Years	rr_AverageAnnualReturnYear05	1.92%
Since Inception	rr_AverageAnnualReturnSinceInception	4.54%

[1] Class A Shares are not currently offered to new shareholders.

[2] The Maximum Deferred Sales Charge (Load) is charged on the lesser of the purchase price of the Shares being redeemed or the net asset value of those Shares at the time of redemption.

[3] "Total Annual Fund Operating Expenses" have been restated to reflect the proportionate share of the expenses of the Underlying Funds in which the Fund invests. Effective October 1, 2010, Russell Investment Management Company ("RIMCo") agreed to assume the responsibility of payment for all operating expenses other than Rule 12b-1 distribution fees, shareholder services fees, extraordinary expenses or the expenses of other investment companies in which the Fund invests which are borne indirectly by the Fund.