Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

ASTON FUNDS

Prospectus Date

rr_ProspectusDate

Feb. 28, 2015

ASTON/MONTAG & CALDWELL GROWTH FUND

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

ASTON/Montag & Caldwell Growth Fund

Objective [Heading]

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INVESTMENT OBJECTIVES

Objective, Primary [Text Block]

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The Fund seeks long-term capital appreciation and,

Objective, Secondary [Text Block]

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secondarily, current income, by investing primarily in common stocks and convertible securities.

Expense [Heading]

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FEES AND EXPENSES

Expense Narrative [Text Block]

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The table below describes the fees and expenses that you may pay if you buy and hold shares of the Fund.

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 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. During the most recent fiscal year, the Fund’s portfolio turnover rate was 47.31%.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

47.31%

Expense Example [Heading]

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Example

Expense Example Narrative [Text Block]

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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 shows the operating expenses you would incur as a shareholder if you invested $10,000 in the Fund over the time periods shown and you redeem all your shares at the end of those periods. The example assumes that the average annual return was 5% and operating expenses remained the same.

Although your actual costs may be higher or lower, based on the above assumptions, your costs would be:

Strategy [Heading]

rr_StrategyHeading

PRINCIPAL INVESTMENT STRATEGIES

Strategy Narrative [Text Block]

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The Fund invests primarily in common stocks, convertible preferred stocks, and convertible bonds. The subadviser uses a bottom-up approach to stock selection and seeks high quality, well-established, large-cap companies that the subadviser believes are growing their near-term earnings at an above average rate. The Fund defines a large-cap company as one having a market capitalization of $5 billion or more at the time of acquisition. The subadviser emphasizes valuation to find companies selling at a discount to their intrinsic value. These companies must pass an initial capitalization screen and:

• Have a strong history of earnings growth
• Be attractively priced, relative to the company’s potential for above average long-term earnings and revenue growth
• Have strong balance sheets
• Have a sustainable competitive advantage
• Be currently, or have the potential to become, industry leaders
• Have the potential to outperform during market downturns

The Fund may invest in foreign securities (directly and through depositary receipts).

To manage risk, the subadviser limits sector and individual security exposure, and adheres to a structured sell discipline.

Risk [Heading]

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PRINCIPAL RISKS

Risk Narrative [Text Block]

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You could lose money by investing in the Fund. There can be no assurance that the Fund’s investment objective will be achieved. The following is a summary of the principal risks of investing in the Fund.

Convertible Securities Risk. Convertible preferred stocks, which are convertible into shares of the issuer’s common stock and pay regular dividends, and convertible bonds, which are convertible into shares of the issuer’s common stock and bear interest, are subject to the risks of equity securities and fixed income securities. The lower the conversion premium, the more likely the price of the convertible security will follow the price of the underlying common stock. Conversely, higher premium convertible securities are more likely to exhibit the behavior of bonds because the likelihood of conversion is lower, which may cause their prices to fall as interest rates rise.

The value of a convertible security is also affected by the credit quality of the issuer and any call provisions. There is the risk that the issuer of convertible preferred stock will not be able to make dividend payments or that the issuer of a convertible bond will not be able to make principal and/or interest payments.

Foreign Securities Risk. Investing in the securities of foreign issuers involves special risks and considerations in addition to those typically associated with investing in U.S. companies. The securities of foreign companies may be less liquid and their prices may fluctuate more widely than those traded in U.S. markets. Foreign companies and markets may also have less governmental supervision. There may be difficulty in enforcing contractual obligations against, and little public information about, the companies. Trades typically take more time to settle and clear, and the costs of buying and selling foreign securities are generally higher than the costs associated with buying and selling securities traded in U.S. markets.

The values of the foreign securities held by the Fund may be affected by changes in currency exchange rates or control regulations. If a local currency gains against the U.S. dollar, the value of a holding denominated in that currency increases in U.S. dollar terms. If a local currency declines against the U.S. dollar, the value of the holding decreases in U.S. dollar terms. Changes in economic, tax or foreign investment policies, or other political, governmental or economic actions can adversely affect the value of the foreign securities held by the Fund. In foreign countries, accounting, auditing and financial reporting standards and other regulatory practices and requirements are generally different from those required for U.S. companies. Investments in securities of foreign issuers may also be subject to foreign withholding and other taxes.

Growth Style Risk. Growth investing involves buying stocks of companies that the subadviser believes offer above-average growth potential. These stocks may have relatively high valuations, as measured by traditional valuation metrics (e.g., price-to-earnings ratios or price-to-book ratios). Growth stocks may be more volatile than other stocks because they are generally more sensitive to investor perceptions and market moves. Because different types of stocks go in and out of favor with prevailing market and economic conditions, the Fund’s performance may be adversely affected when growth stocks underperform.

Liquidity Risk. When there is no willing buyer and a security cannot be readily sold at the desired time or price, the Fund may need to accept a lower price or may not be able to sell the security at all. An inability to sell securities, at the Fund’s desired price or at all, can adversely affect the Fund’s value or prevent the Fund from being able to take advantage of other investment opportunities. Less liquid securities are more difficult to dispose of at their recorded values and are subject to wider bid-ask spreads and volatility.

Manager Risk. The performance of the Fund is dependent upon the investment adviser’s skill in selecting managers and the subadviser’s skill in making appropriate investments. As a result, the Fund may underperform its benchmark or its peers.

Market Risk. The Fund’s share price can move down in response to stock market conditions, changes in the economy or changes in a particular company’s stock price. An individual stock may decline in value even when the value of stocks in general is rising.

Risk Lose Money [Text]

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You could lose money by investing in the Fund.

Bar Chart and Performance Table [Heading]

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FUND PERFORMANCE

Performance Narrative [Text Block]

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The bar chart shows how the performance of the Class N shares of the Fund has varied from year to year over the periods shown. Class N shares, Class I shares, and Class R shares are invested in the same portfolio of securities, so the annual returns would differ only to the extent that the classes have different expenses. The annual returns of the Class I shares would be higher than the returns of Class N shares and Class R shares due to 12b-1 fees paid by Class N shares and Class R shares. This information may help illustrate the risks of investing in the Fund. The Fund makes updated performance information available on the Fund’s website, www.astonfunds.com, or by calling toll-free 800-992-8151. As with all mutual funds, past performance (before and after taxes) does not guarantee future performance.

Performance Information Illustrates Variability of Returns [Text]

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The bar chart shows how the performance of the Class N shares of the Fund has varied from year to year over the periods shown.

The following table indicates how the Fund’s average annual returns for different calendar periods compared to the returns of a broad-based securities market index.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

800-992-8151

Performance Availability Website Address [Text]

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www.astonfunds.com

Performance Past Does Not Indicate Future [Text]

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As with all mutual funds, past performance (before and after taxes) does not guarantee future performance.

Bar Chart [Heading]

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Class N Shares
Calendar Year Total Return

Bar Chart Closing [Text Block]

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Best quarter:	06/09	14.92	%
Worst quarter:	12/08	(20.35	)%

Performance Table Heading

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Average Annual Total Return
(For the periods ended December 31, 2014)

Performance Table Uses Highest Federal Rate

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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

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After-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown 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]

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After-tax returns are shown only for Class N shares. After-tax returns for Class I shares and Class R shares will vary.

Performance Table Explanation after Tax Higher

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In some instances, the “Return After Taxes on Distributions and Sales of Fund Shares” may be greater than “Return Before Taxes” because the investor is assumed to be able to use the capital loss of the sale of Fund shares to offset other taxable gains.

Performance Table Narrative

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The following table indicates how the Fund’s average annual returns for different calendar periods compared to the returns of a broad-based securities market index.

Performance Table Closing [Text Block]

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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. In some instances, the “Return After Taxes on Distributions and Sales of Fund Shares” may be greater than “Return Before Taxes” because the investor is assumed to be able to use the capital loss of the sale of Fund shares to offset other taxable gains. After-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown only for Class N shares. After-tax returns for Class I shares and Class R shares will vary.

ASTON/MONTAG & CALDWELL GROWTH FUND | Class N Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.63%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.15%

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.04%

1 Year

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106

3 Years

rr_ExpenseExampleYear03

331

5 Years

rr_ExpenseExampleYear05

574

10 Years

rr_ExpenseExampleYear10

1,271

2005

rr_AnnualReturn2005

5.36%

2006

rr_AnnualReturn2006

8.07%

2007

rr_AnnualReturn2007

21.04%

2008

rr_AnnualReturn2008

(32.64%)

2009

rr_AnnualReturn2009

29.84%

2010

rr_AnnualReturn2010

8.28%

2011

rr_AnnualReturn2011

3.13%

2012

rr_AnnualReturn2012

12.70%

2013

rr_AnnualReturn2013

27.29%

2014

rr_AnnualReturn2014

7.35%

Highest Quarterly Return, Label

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Best quarter:

Highest Quarterly Return, Date

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Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

14.92%

Lowest Quarterly Return, Label

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Worst quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(20.35%)

1 Year

rr_AverageAnnualReturnYear01

7.35%

5 Years

rr_AverageAnnualReturnYear05

11.45%

10 Years

rr_AverageAnnualReturnYear10

7.56%

Since Inception

rr_AverageAnnualReturnSinceInception

9.29%

Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 02, 1994

ASTON/MONTAG & CALDWELL GROWTH FUND | Class I Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.63%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.15%

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.79%

1 Year

rr_ExpenseExampleYear01

81

3 Years

rr_ExpenseExampleYear03

252

5 Years

rr_ExpenseExampleYear05

439

10 Years

rr_ExpenseExampleYear10

978

1 Year

rr_AverageAnnualReturnYear01

7.59%

5 Years

rr_AverageAnnualReturnYear05

11.72%

10 Years

rr_AverageAnnualReturnYear10

7.84%

Since Inception

rr_AverageAnnualReturnSinceInception

7.83%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jun. 28, 1996

ASTON/MONTAG & CALDWELL GROWTH FUND | Class R Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.63%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.50%

Other Expenses

rr_OtherExpensesOverAssets

0.15%

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.29%

1 Year

rr_ExpenseExampleYear01

131

3 Years

rr_ExpenseExampleYear03

409

5 Years

rr_ExpenseExampleYear05

708

10 Years

rr_ExpenseExampleYear10

1,556

1 Year

rr_AverageAnnualReturnYear01

7.04%

5 Years

rr_AverageAnnualReturnYear05

11.17%

10 Years

rr_AverageAnnualReturnYear10

7.30%

Since Inception

rr_AverageAnnualReturnSinceInception

7.79%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2002

ASTON/MONTAG & CALDWELL GROWTH FUND | Return After Taxes on Distributions | Class N Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

3.13%

5 Years

rr_AverageAnnualReturnYear05

9.65%

10 Years

rr_AverageAnnualReturnYear10

6.37%

Since Inception

rr_AverageAnnualReturnSinceInception

8.43%

Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 02, 1994

ASTON/MONTAG & CALDWELL GROWTH FUND | Return After Taxes on Distributions and Sale of Fund Shares | Class N Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

7.69%

5 Years

rr_AverageAnnualReturnYear05

9.22%

10 Years

rr_AverageAnnualReturnYear10

6.19%

Since Inception

rr_AverageAnnualReturnSinceInception

8.04%

Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 02, 1994

ASTON/MONTAG & CALDWELL GROWTH FUND | Russell 1000 Growth Index (Reflects no deduction for taxes, expenses or fees. Index return since inception for Class N shares is computed from October 31, 1994. Index return for Class I shares, since inception, computed from June 30, 1996, is 7.29%. Index return for Class R shares, since inception, computed from December 31, 2002, is 9.94%.) | Class N Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

13.05%

5 Years

rr_AverageAnnualReturnYear05

15.81%

10 Years

rr_AverageAnnualReturnYear10

8.49%

Since Inception

rr_AverageAnnualReturnSinceInception

8.88%

Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 31, 1994

ASTON/MONTAG & CALDWELL GROWTH FUND | Russell 1000 Growth Index (Reflects no deduction for taxes, expenses or fees. Index return since inception for Class N shares is computed from October 31, 1994. Index return for Class I shares, since inception, computed from June 30, 1996, is 7.29%. Index return for Class R shares, since inception, computed from December 31, 2002, is 9.94%.) | Class I Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

13.05%

5 Years

rr_AverageAnnualReturnYear05

15.81%

10 Years

rr_AverageAnnualReturnYear10

8.49%

Since Inception

rr_AverageAnnualReturnSinceInception

7.29%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jun. 30, 1996

ASTON/MONTAG & CALDWELL GROWTH FUND | Russell 1000 Growth Index (Reflects no deduction for taxes, expenses or fees. Index return since inception for Class N shares is computed from October 31, 1994. Index return for Class I shares, since inception, computed from June 30, 1996, is 7.29%. Index return for Class R shares, since inception, computed from December 31, 2002, is 9.94%.) | Class R Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

13.05%

5 Years

rr_AverageAnnualReturnYear05

15.81%

10 Years

rr_AverageAnnualReturnYear10

8.49%

Since Inception

rr_AverageAnnualReturnSinceInception

9.94%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2002