Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

ASTON FUNDS

Prospectus Date

rr_ProspectusDate

Feb. 28, 2015

ASTON/BARINGS INTERNATIONAL FUND

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

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ASTON/Barings International Fund

Objective [Heading]

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INVESTMENT OBJECTIVE

Objective, Primary [Text Block]

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The Fund seeks to provide total return.

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.

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)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

February 29, 2016

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 53.14%.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

53.14%

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%, operating expenses remained the same, and expenses were capped for one year in each period.

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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Under normal conditions, the Fund invests at least 80% of its assets in common stock and other equity securities of non-U.S. companies.

The subadviser employs a growth at a reasonable price (“GARP”) strategy. GARP investing involves buying stocks that have a reasonable price/earnings ratio in relationship to a company’s earnings growth rate. The investment process combines bottom-up and top-down analysis. Bottom-up analysis is based on global company research that seeks to identify positive catalysts for outperformance or earnings surprise based on both growth and value factors. Top-down analysis seeks to assess the relative attractiveness of countries and sectors.

The Fund may invest in companies of all sizes and market capitalization levels. The Fund invests primarily in companies in Europe, Australasia and the Far East (“EAFE”) and emerging markets. Under normal conditions, the Fund will invest in issuers from at least five countries excluding the United States.

Risk [Heading]

rr_RiskHeading

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.

Emerging Market Securities Risk. In addition to the general foreign securities risks described below, investing in emerging market countries is subject to a number of risks, including:

• Economic structures that are less diverse and mature than those of developed countries
• Less stable political systems and less developed legal systems
• National policies that may restrict foreign investment
• Wide fluctuations in the value of investments, possibly as a result of significant currency exchange rate fluctuations
• Smaller securities markets, making investments less liquid
• Special custody arrangements

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. These risks are heightened for issuers located in emerging markets. 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.

GARP Style Risk. GARP investing involves buying stocks that have a reasonable price/earnings ratio in relationship to a company’s earnings growth rate. Because different types of stocks go in and out of favor with investors depending on prevailing market and economic conditions, the Fund’s performance may be adversely affected when stocks preferred by a GARP investing strategy underperform.

Geographic Concentration Risk. To the extent the Fund invests a substantial amount of its assets in securities of issuers located in a single country or geographic region, any changes to the regulatory, political, social or economic conditions in such country or geographic region will generally have greater impact on the Fund than such changes would have on a more geographically diversified fund, and may result in increased volatility and greater losses.

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.

Small-Cap and Mid-Cap Company Risk. Investing in securities of small-cap and mid-cap companies may involve greater risks than investing in securities of larger, more established companies. Small-cap and mid-cap companies generally have limited product lines, markets, and financial resources. Their securities may trade less frequently and in more limited volumes than the securities of larger, more established companies. Also, small-cap and mid-cap companies are typically subject to greater changes in earnings and business prospects than larger companies. As a result, their stock prices may experience greater volatility and may decline more than those of large-cap companies in market downturns.

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 I shares of the Fund has varied from year to year over the periods shown. Class I shares and Class N 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 N shares would be lower than the returns of the Class I shares due to 12b-1 fees paid by Class N 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]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The bar chart shows how the performance of the Class I 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 of Class I shares for different calendar periods compared to the returns of a broad-based securities market index.

Performance Availability Phone [Text]

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800-992-8151

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

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 I Shares
Calendar Year Total Return

Bar Chart Closing [Text Block]

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Best quarter:	06/09	20.89	%
Worst quarter:	09/08	(22.66	)%

Performance Table Heading

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Average Annual Total Returns
(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 I shares. After-tax returns for Class N shares will vary.

Performance Table Explanation after Tax Higher

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In some instances, the “Return After Taxes on Distributions and Sale 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 of Class I shares 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 Sale 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 I shares. After-tax returns for Class N shares will vary.

ASTON/BARINGS INTERNATIONAL FUND | Class N Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (on shares held less than 90 days, as a percentage of amount redeemed)

rr_RedemptionFeeOverRedemption

2.00%

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.70%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.95%

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.55%)

^[1]

Total Annual Fund Operating Expenses

rr_NetExpensesOverAssets

1.40%

^[1],[2]

1 Year

rr_ExpenseExampleYear01

143

3 Years

rr_ExpenseExampleYear03

559

5 Years

rr_ExpenseExampleYear05

1,001

10 Years

rr_ExpenseExampleYear10

2,230

1 Year

rr_AverageAnnualReturnYear01

(7.14%)

5 Years

rr_AverageAnnualReturnYear05

Since Inception

rr_AverageAnnualReturnSinceInception

4.57%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 03, 2010

ASTON/BARINGS INTERNATIONAL FUND | Class I Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (on shares held less than 90 days, as a percentage of amount redeemed)

rr_RedemptionFeeOverRedemption

2.00%

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.70%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.70%

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.55%)

^[1]

Total Annual Fund Operating Expenses

rr_NetExpensesOverAssets

1.15%

^[1],[2]

1 Year

rr_ExpenseExampleYear01

117

3 Years

rr_ExpenseExampleYear03

482

5 Years

rr_ExpenseExampleYear05

871

10 Years

rr_ExpenseExampleYear10

1,963

2008

rr_AnnualReturn2008

(44.34%)

2009

rr_AnnualReturn2009

28.82%

2010

rr_AnnualReturn2010

8.24%

2011

rr_AnnualReturn2011

(10.54%)

2012

rr_AnnualReturn2012

13.22%

2013

rr_AnnualReturn2013

17.17%

2014

rr_AnnualReturn2014

(7.17%)

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

20.89%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(22.66%)

1 Year

rr_AverageAnnualReturnYear01

(7.17%)

5 Years

rr_AverageAnnualReturnYear05

3.58%

Since Inception

rr_AverageAnnualReturnSinceInception

(2.79%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 02, 2007

ASTON/BARINGS INTERNATIONAL FUND | Return After Taxes on Distributions | Class I Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(10.50%)

5 Years

rr_AverageAnnualReturnYear05

2.04%

Since Inception

rr_AverageAnnualReturnSinceInception

(3.81%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 02, 2007

ASTON/BARINGS INTERNATIONAL FUND | Return After Taxes on Distributions and Sale of Fund Shares | Class I Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(1.28%)

5 Years

rr_AverageAnnualReturnYear05

2.79%

Since Inception

rr_AverageAnnualReturnSinceInception

(2.07%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 02, 2007

ASTON/BARINGS INTERNATIONAL FUND | MSCI EAFE Index (Reflects no deduction for taxes, expenses or fees. Index return since inception for Class I shares is computed from October 31, 2007. Index return for Class N shares, since inception, computed from February 28, 2010, is 6.66%) | Class N Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(4.90%)

5 Years

rr_AverageAnnualReturnYear05

5.33%

Since Inception

rr_AverageAnnualReturnSinceInception

6.66%

Inception Date

rr_AverageAnnualReturnInceptionDate

Feb. 28, 2010

ASTON/BARINGS INTERNATIONAL FUND | MSCI EAFE Index (Reflects no deduction for taxes, expenses or fees. Index return since inception for Class I shares is computed from October 31, 2007. Index return for Class N shares, since inception, computed from February 28, 2010, is 6.66%) | Class I Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(4.90%)

5 Years

rr_AverageAnnualReturnYear05

5.33%

Since Inception

rr_AverageAnnualReturnSinceInception

(1.24%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 31, 2007

[1] The investment adviser is contractually obligated to waive management fees and/or reimburse ordinary operating expenses, not including investment-related costs (such as brokerage commissions), interest, taxes, extraordinary expenses and acquired fund fees and expenses, through February 29, 2016, to the extent that operating expenses exceed 1.40% of the Fund's average daily net assets with respect to Class N shares and 1.15% of the Fund's average daily net assets with respect to Class I shares (the "Operating Expense Limit"). Prior to February 29, 2016, the arrangement may be amended or terminated for a class only by a vote of the Board of Trustees of Aston Funds. For a period of up to three years from the end of the fiscal year during which fees are waived or expenses are reimbursed, the investment adviser is entitled to be reimbursed by the Fund for such fees waived and expenses reimbursed from the commencement of operations through the completion of the first three full fiscal years to the extent that the Fund's Total Annual Operating Expenses for a class, not including investment-related costs (such as brokerage commissions), interest, taxes, extraordinary expenses and acquired fund fees and expenses remain at or below the Operating Expense Limit after such reimbursement.

[2] After Fee Waiver and/or Expense Reimbursement