Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Jun. 15, 2012
U.S. Government Money Market Fund (Prospectus Summary) | U.S. Government Money Market Fund
Risk Return [Abstract]	rr_RiskReturnAbstract
Risk/Return, Heading	rr_RiskReturnHeading	U.S. Government Money Market Fund
Investment Objective, Heading	rr_ObjectiveHeading	INVESTMENT OBJECTIVE
investment Objective, Primary	rr_ObjectivePrimaryTextBlock	The U.S. Government Money Market Fund (the "Fund") seeks to provide security of principal, high current income, and liquidity.
Expense, Heading	rr_ExpenseHeading	FEES AND EXPENSES OF THE FUND
Expense, Narrative	rr_ExpenseNarrativeTextBlock	This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.
Shareholder Fees, Caption	rr_ShareholderFeesCaption	SHAREHOLDER FEES (fees paid directly from your investment) N/A	[1]
Operating Expenses, Caption	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	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 Total Annual Fund Operating Expenses or in the Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 0% of the average value of its portfolio. However, the Fund's portfolio turnover rate is calculated without regard to cash instruments or derivatives. If such instruments were included, the Fund's portfolio turnover rate might be significantly higher.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	0.00%
Expense Example, Heading	rr_ExpenseExampleHeading	EXAMPLE
Expense Example, Narrative	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 that your investment has a 5% return each year and that the Fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Investment Strategy, Heading	rr_StrategyHeading	PRINCIPAL INVESTMENT STRATEGIES
Investment Strategy, Narrative	rr_StrategyNarrativeTextBlock	The Fund invests primarily in money market instruments issued or guaranteed as to principal and interest by the U.S. government, its agencies or instrumentalities, and enters into repurchase agreements collateralized fully by U.S. government securities. The Fund also may invest in other securities that are determined to be "Eligible Securities" as defined in Rule 2a-7 of the Investment Company Act of 1940 (the "1940 Act"), including, but not limited to Eurodollar Time Deposits, securities issued by the International Bank for Reconstruction and Development (also known as The World Bank), and high-quality commercial paper certificates of deposit, and short-term corporate bonds. The Fund operates in compliance with U.S. Securities and Exchange Commission (the "SEC") rules, including Rule 2a-7, which impose certain liquidity, maturity and diversification requirements on all registered money market funds. All securities purchased by the Fund must have remaining maturities of 397 days or less, and must be found by the Advisor to represent minimal credit risk and be of eligible quality. Under normal circumstances, the Fund will invest at least 80% of its net assets, plus any borrowings for investment purposes, in government securities as defined by Section 2(a)(16) of the 1940 Act (and derivatives thereof). Section 2(a)(16) of the 1940 Act defines "government security" to mean any security issued or guaranteed as to principal or interest by the United States, or by a person controlled or supervised by and acting as an instrumentality of the government of the United States pursuant to authority granted by the Congress of the United States; or any certificate of deposit for any of the foregoing.
Risk, Heading	rr_RiskHeading	PRINCIPAL RISKS
Risk, Narrative	rr_RiskNarrativeTextBlock	As with all mutual funds, a shareholder is subject to the risk that his or her investment could lose money. In addition to this risk, the Fund is subject to a number of additional risks that may affect the value of its shares, including: Credit Risk - The Fund could lose money if the issuer or guarantor of a debt instrument in which it invests becomes unwilling or unable to make timely principal and/or interest payments, or to otherwise meet its obligations. Income Risk - Income Risk involves the potential for decline in the Fund's yield (the rate of dividends the Fund pays) in the event of declining interest rates. Interest Rate Risk - The market value of fixed income investments and related financial instruments will change in response to interest rate changes. During periods of falling interest rates, the values of fixed income securities generally rise. Conversely, during periods of rising interest rates, the values of such securities generally decline. Repurchase Agreement Risk - The Fund's investment in repurchase agreements may be subject to market and credit risk with respect to the repurchase agreement counterparty and underlying collateral securing the repurchase agreements. Investments in repurchase agreements also may be subject to the risk that the market value of the underlying obligations may decline prior to the expiration of the repurchase agreement term. Stable Price Per Share Risk - The Fund's assets are valued using the amortized cost method, which enables the Fund to maintain a stable price of $1.00 per share. Although the Fund is managed to maintain a stable price per share of $1.00, there is no guarantee that the price will be constantly maintained, and it is possible to lose money.
Risk, Money Market Fund	rr_RiskMoneyMarketFund	Although the Fund is managed to maintain a stable price per share of $1.00, there is no guarantee that the price will be constantly maintained, and it is possible to lose money.
Bar Chart and Performance Table, Heading	rr_BarChartAndPerformanceTableHeading	PERFORMANCE INFORMATION
Performance, Narrative	rr_PerformanceNarrativeTextBlock	Effective upon the close of business on June 15, 2012, the Fund replaced its existing Investor Class Shares, Advisor Class Shares, A-Class Shares, C-Class Shares and Investor2 Class Shares with a single share class. The Fund's new share class has no performance history. Therefore, the returns shown in the bar chart below for all periods are the returns of the Fund's former Investor Class Shares, which were subject to the same fees and expenses as the shares offered in this Prospectus. The Fund's shares would have annual returns substantially similar to those of the former Investor Class Shares because they are invested in the same portfolio of securities. Updated performance information is available on the Fund's website at www.rydex-sgi.com or by calling Guggenheim Investments Client Services at 800.820.0888.
Performance, Availability Phone Number	rr_PerformanceAvailabilityPhone	800.820.0888
Performance, Availability Website Address	rr_PerformanceAvailabilityWebSiteAddress	www.rydex-sgi.com
Bar Chart, Heading	rr_BarChartHeading	The performance information shown below for the Fund's former Investor Class Shares is based on a calendar year.
Bar Chart, Closing	rr_BarChartClosingTextBlock	Highest Quarter Return              Lowest Quarter Return (quarter ended 12/31/2006) 1.10%    (quarter ended 09/30/2011) 0.00%
Performance Table, Closing	rr_PerformanceTableClosingTextBlock	YIELD Call 800.820.0888 for the Fund's current yield.
Average Annual Returns, Caption	rr_AverageAnnualReturnCaption	AVERAGE ANNUAL TOTAL RETURN (for periods ended December 31, 2011)
U.S. Government Money Market Fund (Prospectus Summary) | U.S. Government Money Market Fund | Money Market Class Shares
Risk Return [Abstract]	rr_RiskReturnAbstract
Management Fees	rr_ManagementFeesOverAssets	0.50%
Distribution and Shareholder Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses	rr_OtherExpensesOverAssets	0.41%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	0.91%
Expense Example, With Redemption, 1 Year	rr_ExpenseExampleYear01	93
Expense Example, With Redemption, 3 Years	rr_ExpenseExampleYear03	290
Expense Example, With Redemption, 5 Years	rr_ExpenseExampleYear05	504
Expense Example, With Redemption, 10 Years	rr_ExpenseExampleYear10	1,120
Annual Return 2002	rr_AnnualReturn2002	0.86%
Annual Return 2003	rr_AnnualReturn2003	0.24%
Annual Return 2004	rr_AnnualReturn2004	0.45%
Annual Return 2005	rr_AnnualReturn2005	2.33%
Annual Return 2006	rr_AnnualReturn2006	4.08%
Annual Return 2007	rr_AnnualReturn2007	4.22%
Annual Return 2008	rr_AnnualReturn2008	1.65%
Annual Return 2009	rr_AnnualReturn2009	0.05%
Annual Return 2010	rr_AnnualReturn2010	0.01%
Annual Return 2011	rr_AnnualReturn2011	0.01%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Highest Quarter Return
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Dec. 31, 2006
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	1.10%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Lowest Quarter Return
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Sep. 30, 2011
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	0.00%
Average Annual Returns, Label	rr_AverageAnnualReturnLabel	Return Before Taxes
Average Annual Returns, 1 Year	rr_AverageAnnualReturnYear01	0.01%
Average Annual Returns, 5 Years	rr_AverageAnnualReturnYear05	1.17%
Average Annual Returns, 10 Years	rr_AverageAnnualReturnYear10	1.38%

[1] If you exchange your A-Class Shares or C-Class Shares of another Guggenheim Investments fund for shares of the Fund, and your A-Class Shares or C-Class Shares are subject to a deferred sales charge at the time of the exchange, no deferred sales charge will be incurred on the exchange itself. However, any such deferred sales charge will be assessed at the time you redeem your shares of the Fund.