| Form N-CSR Cover | 12 Months Ended |
| Sep. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | Bernstein Fund Inc |
| Entity Central Index Key | 0001653463 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Sep. 30, 2024 |
| Shareholder Report | 12 Months Ended | 105 Months Ended |
| Sep. 30, 2024 USD ($) Holding | Sep. 30, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | ||
| Document Type | N-CSR | |
| Amendment Flag | false | |
| Registrant Name | Bernstein Fund Inc | |
| Entity Central Index Key | 0001653463 | |
| Entity Investment Company Type | N-1A | |
| Document Period End Date | Sep. 30, 2024 | |
| C000163285 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | International Small Cap Portfolio | |
| Class Name | Advisor Class | |
| Trading Symbol | IRCYX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the International Small Cap Portfolio (the “Portfolio”) for the period of October 1, 2023 to September 30, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.abfunds.com/link/AB/IRCYX-A. You can also request this information by contacting us at (800) 227 4618. | |
| Additional Information Phone Number | (800) 227 4618 | |
| Additional Information Website | https://www.abfunds.com/link/AB/IRCYX-A | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Class Name Cost of a $10,000 investment Costs paid as a percentage of a $10,000 investment Advisor Class $121 1.07% | |
| Expenses Paid, Amount | $ 121 | |
| Expense Ratio, Percent | 1.07% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year? What affected the Fund’s performance? For the 12-month period, all share classes of the Portfolio outperformed the Morgan Stanley Capital International ("MSCI") All Country World Index ("ACWI") ex USA Small Cap Index (net) (the "benchmark") and the Lipper International/Mid-Cap Core Funds Average. Stock selection and currency exposures contributed to performance, relative to the benchmark, while sector selection, as well as country allocation detracted from overall returns. Security selection within communication services, technology, and industrials contributed significantly due to strong earnings growth, while selection within consumer staples was the main detractor during the period. | |
| Performance Past Does Not Indicate Future [Text] | ||
| Line Graph [Table Text Block] | Advisor Class MSCI ACWI ex USA Index (net) MSCI ACWI ex USA Small Cap Index (net) 12/15 $10,000 $10,000 $10,000 09/16 $10,930 $10,756 $10,993 09/17 $13,062 $12,865 $13,103 09/18 $13,262 $13,091 $13,347 09/19 $12,241 $12,931 $12,595 09/20 $12,474 $13,319 $13,473 09/21 $16,243 $16,504 $17,927 09/22 $11,238 $12,351 $12,740 09/23 $13,547 $14,869 $15,162 09/24 $16,989 $18,638 $18,687 | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns 1 Year 5 Years Since Inception 12/21/15 Advisor Class 25.41 % 6.77 % 6.22 % MSCI ACWI ex USA Index (net) 25.35 % 7.59 % 7.35 % MSCI ACWI ex USA Small Cap Index (net) 23.25 % 8.21 % 7.38 % The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption or sale of Fund shares. Visit https://www.abfunds.com/link/AB/IRCYX-A for the most recent performance information. | |
| Performance Inception Date | Dec. 21, 2015 | |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption or sale of Fund shares. | |
| AssetsNet | $ 1,150,383,961 | $ 1,150,383,961 |
| Holdings Count | Holding | 279 | 279 |
| Advisory Fees Paid, Amount | $ 10,709,170 | |
| InvestmentCompanyPortfolioTurnover | 50% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets $1,150,383,961 # of Portfolio Holdings 279 Portfolio Turnover Rate 50% Total Advisory Fees Paid $10,709,170 | |
| Holdings [Text Block] | Sector Allocation Value Value Industrials 22.0% Consumer Discretionary 13.7% Financials 11.9% Information Technology 11.1% Materials 9.4% Communication Services 7.5% Health Care 5.9% Energy 5.8% Real Estate 4.3% Consumer Staples 3.5% Utilities 2.2% Short-Term Investments 2.2% Other assets less liabilities 0.5% | |
| Material Fund Change [Text Block] | ||
| C000163291 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | International Small Cap Portfolio | |
| Class Name | Class Z | |
| Trading Symbol | IRCZX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the International Small Cap Portfolio (the “Portfolio”) for the period of October 1, 2023 to September 30, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.abfunds.com/link/AB/IRCZX-A. You can also request this information by contacting us at (800) 227 4618. | |
| Additional Information Phone Number | (800) 227 4618 | |
| Additional Information Website | https://www.abfunds.com/link/AB/IRCZX-A | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Class Name Cost of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class Z $122 1.08% | |
| Expenses Paid, Amount | $ 122 | |
| Expense Ratio, Percent | 1.08% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year? What affected the Fund’s performance? For the 12-month period, all share classes of the Portfolio outperformed the Morgan Stanley Capital International ("MSCI") All Country World Index ("ACWI") ex USA Small Cap Index (net) (the "benchmark") and the Lipper International/Mid-Cap Core Funds Average. Stock selection and currency exposures contributed to performance, relative to the benchmark, while sector selection, as well as country allocation detracted from overall returns. Security selection within communication services, technology, and industrials contributed significantly due to strong earnings growth, while selection within consumer staples was the main detractor during the period. | |
| Performance Past Does Not Indicate Future [Text] | ||
| Line Graph [Table Text Block] | Class Z MSCI ACWI ex USA Index (net) MSCI ACWI ex USA Small Cap Index (net) 12/15 $10,000 $10,000 $10,000 09/16 $10,930 $10,756 $10,993 09/17 $13,063 $12,865 $13,103 09/18 $13,264 $13,091 $13,347 09/19 $12,243 $12,931 $12,595 09/20 $12,477 $13,319 $13,473 09/21 $16,248 $16,504 $17,927 09/22 $11,242 $12,351 $12,740 09/23 $13,538 $14,869 $15,162 09/24 $16,979 $18,638 $18,687 | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns 1 Year 5 Years Since Inception 12/21/15 Class Z 25.42 % 6.76 % 6.22 % MSCI ACWI ex USA Index (net) 25.35 % 7.59 % 7.35 % MSCI ACWI ex USA Small Cap Index (net) 23.25 % 8.21 % 7.38 % The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption or sale of Fund shares. Visit https://www.abfunds.com/link/AB/IRCZX-A for the most recent performance information. | |
| Performance Inception Date | Dec. 21, 2015 | |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption or sale of Fund shares. | |
| AssetsNet | $ 1,150,383,961 | $ 1,150,383,961 |
| Holdings Count | Holding | 279 | 279 |
| Advisory Fees Paid, Amount | $ 10,709,170 | |
| InvestmentCompanyPortfolioTurnover | 50% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets $1,150,383,961 # of Portfolio Holdings 279 Portfolio Turnover Rate 50% Total Advisory Fees Paid $10,709,170 | |
| Holdings [Text Block] | Sector Allocation Value Value Industrials 22.0% Consumer Discretionary 13.7% Financials 11.9% Information Technology 11.1% Materials 9.4% Communication Services 7.5% Health Care 5.9% Energy 5.8% Real Estate 4.3% Consumer Staples 3.5% Utilities 2.2% Short-Term Investments 2.2% Other assets less liabilities 0.5% | |
| Material Fund Change [Text Block] | ||
| C000163292 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | International Small Cap Portfolio | |
| Class Name | SCB Class | |
| Trading Symbol | IRCSX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the International Small Cap Portfolio (the “Portfolio”) for the period of October 1, 2023 to September 30, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.abfunds.com/link/AB/IRCSX-A. You can also request this information by contacting us at (800) 227 4618. | |
| Additional Information Phone Number | (800) 227 4618 | |
| Additional Information Website | https://www.abfunds.com/link/AB/IRCSX-A | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Class Name Cost of a $10,000 investment Costs paid as a percentage of a $10,000 investment SCB Class $149 1.32% | |
| Expenses Paid, Amount | $ 149 | |
| Expense Ratio, Percent | 1.32% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year? What affected the Fund’s performance? For the 12-month period, all share classes of the Portfolio outperformed the Morgan Stanley Capital International ("MSCI") All Country World Index ("ACWI") ex USA Small Cap Index (net) (the "benchmark") and the Lipper International/Mid-Cap Core Funds Average. Stock selection and currency exposures contributed to performance, relative to the benchmark, while sector selection, as well as country allocation detracted from overall returns. Security selection within communication services, technology, and industrials contributed significantly due to strong earnings growth, while selection within consumer staples was the main detractor during the period. | |
| Performance Past Does Not Indicate Future [Text] | ||
| Line Graph [Table Text Block] | SCB Class MSCI ACWI ex USA Index (net) MSCI ACWI ex USA Small Cap Index (net) 12/15 $10,000 $10,000 $10,000 09/16 $10,920 $10,756 $10,993 09/17 $13,026 $12,865 $13,103 09/18 $13,194 $13,091 $13,347 09/19 $12,135 $12,931 $12,595 09/20 $12,349 $13,319 $13,473 09/21 $16,027 $16,504 $17,927 09/22 $11,057 $12,351 $12,740 09/23 $13,289 $14,869 $15,162 09/24 $16,632 $18,638 $18,687 | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns 1 Year 5 Years Since Inception 12/21/15 SCB Class 25.15 % 6.51 % 5.97 % MSCI ACWI ex USA Index (net) 25.35 % 7.59 % 7.35 % MSCI ACWI ex USA Small Cap Index (net) 23.25 % 8.21 % 7.38 % The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption or sale of Fund shares. Visit https://www.abfunds.com/link/AB/IRCSX-A for the most recent performance information. | |
| Performance Inception Date | Dec. 21, 2015 | |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption or sale of Fund shares. | |
| AssetsNet | $ 1,150,383,961 | $ 1,150,383,961 |
| Holdings Count | Holding | 279 | 279 |
| Advisory Fees Paid, Amount | $ 10,709,170 | |
| InvestmentCompanyPortfolioTurnover | 50% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets $1,150,383,961 # of Portfolio Holdings 279 Portfolio Turnover Rate 50% Total Advisory Fees Paid $10,709,170 | |
| Holdings [Text Block] | Sector Allocation Value Value Industrials 22.0% Consumer Discretionary 13.7% Financials 11.9% Information Technology 11.1% Materials 9.4% Communication Services 7.5% Health Care 5.9% Energy 5.8% Real Estate 4.3% Consumer Staples 3.5% Utilities 2.2% Short-Term Investments 2.2% Other assets less liabilities 0.5% | |
| Material Fund Change [Text Block] | ||
| C000163278 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | International Strategic Equities Portfolio | |
| Class Name | Advisor Class | |
| Trading Symbol | STEYX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the International Strategic Equities Portfolio (the “Portfolio”) for the period of October 1, 2023 to September 30, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.abfunds.com/link/AB/STEYX-A. You can also request this information by contacting us at (800) 227 4618. | |
| Additional Information Phone Number | (800) 227 4618 | |
| Additional Information Website | https://www.abfunds.com/link/AB/STEYX-A | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Class Name Cost of a $10,000 investment Costs paid as a percentage of a $10,000 investment Advisor Class $76 0.67% | |
| Expenses Paid, Amount | $ 76 | |
| Expense Ratio, Percent | 0.67% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year? What affected the Fund’s performance? During the 12-month period, all share classes of the Portfolio outperformed Morgan Stanley Capital International ("MSCI") All Country World Index ("ACWI") ex USA Index (net) (the "benchmark"). Sector selection was positive, relative to the benchmark, mainly from an overweight to the technology sector, which was boosted by AI-related sentiment, and an underweight to the materials sector, which was impacted by concerns about weaker demand especially from China. Country selection was positive, as overweights to the Netherlands and Taiwan, and an underweight to China, all contributed. Stock selection was also positive during the period. | |
| Performance Past Does Not Indicate Future [Text] | ||
| Line Graph [Table Text Block] | Advisor Class MSCI ACWI ex USA Index (net) 12/15 $10,000 $10,000 09/16 $10,575 $10,756 09/17 $12,942 $12,865 09/18 $13,095 $13,091 09/19 $12,570 $12,931 09/20 $12,825 $13,319 09/21 $15,393 $16,504 09/22 $11,396 $12,351 09/23 $13,584 $14,869 09/24 $17,380 $18,638 | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns 1 Year 5 Years Since Inception 12/21/15 Advisor Class 27.95 % 6.70 % 6.50 % MSCI ACWI ex USA Index (net) 25.35 % 7.59 % 7.35 % The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption or sale of Fund shares. Visit https://www.abfunds.com/link/AB/STEYX-A for the most recent performance information. | |
| Performance Inception Date | Dec. 21, 2015 | |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption or sale of Fund shares. | |
| AssetsNet | $ 8,260,302,557 | $ 8,260,302,557 |
| Holdings Count | Holding | 84 | 84 |
| Advisory Fees Paid, Amount | $ 49,085,937 | |
| InvestmentCompanyPortfolioTurnover | 69% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets $8,260,302,557 # of Portfolio Holdings 84 Portfolio Turnover Rate 69% Total Advisory Fees Paid $49,085,937 | |
| Holdings [Text Block] | Sector Allocation Value Value Financials 23.1% Industrials 18.1% Information Technology 14.0% Consumer Discretionary 11.5% Health Care 10.4% Communication Services 5.2% Consumer Staples 4.9% Energy 4.8% Materials 3.2% Utilities 1.7% Real Estate 1.4% Short-Term Investments 1.3% Other assets less liabilities 0.4% | |
| Material Fund Change [Text Block] | ||
| C000163284 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | International Strategic Equities Portfolio | |
| Class Name | Class Z | |
| Trading Symbol | STEZX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the International Strategic Equities Portfolio (the “Portfolio”) for the period of October 1, 2023 to September 30, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.abfunds.com/link/AB/STEZX-A. You can also request this information by contacting us at (800) 227 4618. | |
| Additional Information Phone Number | (800) 227 4618 | |
| Additional Information Website | https://www.abfunds.com/link/AB/STEZX-A | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Class Name Cost of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class Z $79 0.69% | |
| Expenses Paid, Amount | $ 79 | |
| Expense Ratio, Percent | 0.69% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year? What affected the Fund’s performance? During the 12-month period, all share classes of the Portfolio outperformed Morgan Stanley Capital International ("MSCI") All Country World Index ("ACWI") ex USA Index (net) (the "benchmark"). Sector selection was positive, relative to the benchmark, mainly from an overweight to the technology sector, which was boosted by AI-related sentiment, and an underweight to the materials sector, which was impacted by concerns about weaker demand especially from China. Country selection was positive, as overweights to the Netherlands and Taiwan, and an underweight to China, all contributed. Stock selection was also positive during the period. | |
| Performance Past Does Not Indicate Future [Text] | ||
| Line Graph [Table Text Block] | Class Z MSCI ACWI ex USA Index (net) 12/15 $10,000 $10,000 09/16 $10,585 $10,756 09/17 $12,951 $12,865 09/18 $13,104 $13,091 09/19 $12,577 $12,931 09/20 $12,831 $13,319 09/21 $15,407 $16,504 09/22 $11,400 $12,351 09/23 $13,594 $14,869 09/24 $17,384 $18,638 | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns 1 Year 5 Years Since Inception 12/21/15 Class Z 27.88 % 6.69 % 6.50 % MSCI ACWI ex USA Index (net) 25.35 % 7.59 % 7.35 % The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption or sale of Fund shares. Visit https://www.abfunds.com/link/AB/STEZX-A for the most recent performance information. | |
| Performance Inception Date | Dec. 21, 2015 | |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption or sale of Fund shares. | |
| AssetsNet | $ 8,260,302,557 | $ 8,260,302,557 |
| Holdings Count | Holding | 84 | 84 |
| Advisory Fees Paid, Amount | $ 49,085,937 | |
| InvestmentCompanyPortfolioTurnover | 69% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets $8,260,302,557 # of Portfolio Holdings 84 Portfolio Turnover Rate 69% Total Advisory Fees Paid $49,085,937 | |
| Holdings [Text Block] | Sector Allocation Value Value Financials 23.1% Industrials 18.1% Information Technology 14.0% Consumer Discretionary 11.5% Health Care 10.4% Communication Services 5.2% Consumer Staples 4.9% Energy 4.8% Materials 3.2% Utilities 1.7% Real Estate 1.4% Short-Term Investments 1.3% Other assets less liabilities 0.4% | |
| Material Fund Change [Text Block] | ||
| C000163277 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | International Strategic Equities Portfolio | |
| Class Name | SCB Class | |
| Trading Symbol | STESX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the International Strategic Equities Portfolio (the “Portfolio”) for the period of October 1, 2023 to September 30, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.abfunds.com/link/AB/STESX-A. You can also request this information by contacting us at (800) 227 4618. | |
| Additional Information Phone Number | (800) 227 4618 | |
| Additional Information Website | https://www.abfunds.com/link/AB/STESX-A | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Class Name Cost of a $10,000 investment Costs paid as a percentage of a $10,000 investment SCB Class $105 0.92% | |
| Expenses Paid, Amount | $ 105 | |
| Expense Ratio, Percent | 0.92% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year? What affected the Fund’s performance? During the 12-month period, all share classes of the Portfolio outperformed Morgan Stanley Capital International ("MSCI") All Country World Index ("ACWI") ex USA Index (net) (the "benchmark"). Sector selection was positive, relative to the benchmark, mainly from an overweight to the technology sector, which was boosted by AI-related sentiment, and an underweight to the materials sector, which was impacted by concerns about weaker demand especially from China. Country selection was positive, as overweights to the Netherlands and Taiwan, and an underweight to China, all contributed. Stock selection was also positive during the period. | |
| Performance Past Does Not Indicate Future [Text] | ||
| Line Graph [Table Text Block] | SCB Class MSCI ACWI ex USA Index (net) 12/15 $10,000 $10,000 09/16 $10,575 $10,756 09/17 $12,902 $12,865 09/18 $13,013 $13,091 09/19 $12,463 $12,931 09/20 $12,688 $13,319 09/21 $15,196 $16,504 09/22 $11,226 $12,351 09/23 $13,338 $14,869 09/24 $17,033 $18,638 | |
| Average Annual Return [Table Text Block] | Average Annual Total Returns 1 Year 5 Years Since Inception 12/21/15 SCB Class 27.71 % 6.45 % 6.25 % MSCI ACWI ex USA Index (net) 25.35 % 7.59 % 7.35 % The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption or sale of Fund shares. Visit https://www.abfunds.com/link/AB/STESX-A for the most recent performance information. | |
| Performance Inception Date | Dec. 21, 2015 | |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption or sale of Fund shares. | |
| AssetsNet | $ 8,260,302,557 | $ 8,260,302,557 |
| Holdings Count | Holding | 84 | 84 |
| Advisory Fees Paid, Amount | $ 49,085,937 | |
| InvestmentCompanyPortfolioTurnover | 69% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets $8,260,302,557 # of Portfolio Holdings 84 Portfolio Turnover Rate 69% Total Advisory Fees Paid $49,085,937 | |
| Holdings [Text Block] | Sector Allocation Value Value Financials 23.1% Industrials 18.1% Information Technology 14.0% Consumer Discretionary 11.5% Health Care 10.4% Communication Services 5.2% Consumer Staples 4.9% Energy 4.8% Materials 3.2% Utilities 1.7% Real Estate 1.4% Short-Term Investments 1.3% Other assets less liabilities 0.4% | |
| Material Fund Change [Text Block] | ||
| C000163294 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Small Cap Core Portfolio | |
| Class Name | Advisor Class | |
| Trading Symbol | SCRYX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Small Cap Core Portfolio (the “Portfolio”) for the period of October 1, 2023 to September 30, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.abfunds.com/link/AB/SCRYX-A. You can also request this information by contacting us at (800) 227 4618. | |
| Additional Information Phone Number | (800) 227 4618 | |
| Additional Information Website | https://www.abfunds.com/link/AB/SCRYX-A | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Class Name Cost of a $10,000 investment Costs paid as a percentage of a $10,000 investment Advisor Class $101 0.89% | |
| Expenses Paid, Amount | $ 101 | |
| Expense Ratio, Percent | 0.89% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year? What affected the Fund’s performance? During the 12-month period ended September 30, 2024, Advisor Class and Class Z shares of the Portfolio outperformed, while SCB Class shares underperformed the Russell 2000 Index (the "benchmark"). From a quantitative perspective, momentum and value factor exposures contributed to performance, relative to the benchmark. Conversely, the Portfolio’s exposure to companies with high profitability detracted from performance as low profitability companies outperformed during the period. Additionally, the Portfolio’s exposure to holdings with strong investor sentiment negatively impacted performance as companies with weaker historical investor sentiment outperformed. | |
| Line Graph [Table Text Block] | Advisor Class Russell 2000 Index S&P 500 Index 12/15 $10,000 $10,000 $10,000 09/16 $10,565 $10,911 $10,606 09/17 $12,287 $13,174 $12,580 09/18 $13,840 $15,181 $14,833 09/19 $12,470 $13,832 $15,464 09/20 $12,075 $13,885 $17,807 09/21 $17,826 $20,506 $23,149 09/22 $14,079 $15,687 $19,568 09/23 $16,094 $17,088 $23,798 09/24 $20,433 $21,661 $32,449 | |
| Average Annual Return [Table Text Block] | 1 Year 5 Years Since Inception 12/29/15 Advisor Class 26.96 % 10.38 % 8.50 % Russell 2000 Index 26.76 % 9.39 % 9.22 % S&P 500 Index 36.35 % 15.98 % 14.38 % | |
| Performance Inception Date | Dec. 29, 2015 | |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption or sale of Fund shares. | |
| AssetsNet | $ 742,166,244 | $ 742,166,244 |
| Advisory Fees Paid, Amount | $ 5,416,981 | |
| InvestmentCompanyPortfolioTurnover | 63% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets $742,166,244 # of Portfolio Holdings 229 Portfolio Turnover Rate 63% Total Advisory Fees Paid $5,416,981 | |
| Holdings [Text Block] | Sector Allocation Value Value Health Care 17.4% Financials 17.3% Industrials 17.0% Information Technology 12.6% Consumer Discretionary 10.5% Real Estate 6.4% Energy 5.8% Materials 3.8% Consumer Staples 2.8% Utilities 2.7% Communication Services 2.6% Short-Term Investments 0.7% Other assets less liabilities 0.4% | |
| Largest Holdings [Text Block] | 10 Top Holdings Company U.S. $ Value % of Net Assets Vaxcyte, Inc. $6,872,198 0.9 % Insmed, Inc. $6,053,963 0.8 % Jackson Financial, Inc. - Class A $5,885,612 0.8 % Fabrinet $5,733,670 0.8 % Boot Barn Holdings, Inc. $5,731,013 0.8 % Taylor Morrison Home Corp. $5,626,491 0.8 % Powell Industries, Inc. $5,607,245 0.8 % SPX Technologies, Inc. $5,516,359 0.7 % ACI Worldwide, Inc. $5,431,030 0.7 % SPS Commerce, Inc. $5,378,509 0.7 % Total $57,836,090 7.8 % | |
| Material Fund Change [Text Block] | ||
| C000163300 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Small Cap Core Portfolio | |
| Class Name | Class Z | |
| Trading Symbol | SCRZX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Small Cap Core Portfolio (the “Portfolio”) for the period of October 1, 2023 to September 30, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.abfunds.com/link/AB/SCRZX-A. You can also request this information by contacting us at (800) 227 4618. | |
| Additional Information Phone Number | (800) 227 4618 | |
| Additional Information Website | https://www.abfunds.com/link/AB/SCRZX-A | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Class Name Cost of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class Z $100 0.88% | |
| Expenses Paid, Amount | $ 100 | |
| Expense Ratio, Percent | 0.88% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year? What affected the Fund’s performance? During the 12-month period ended September 30, 2024, Advisor Class and Class Z shares of the Portfolio outperformed, while SCB Class shares underperformed the Russell 2000 Index (the "benchmark"). From a quantitative perspective, momentum and value factor exposures contributed to performance, relative to the benchmark. Conversely, the Portfolio’s exposure to companies with high profitability detracted from performance as low profitability companies outperformed during the period. Additionally, the Portfolio’s exposure to holdings with strong investor sentiment negatively impacted performance as companies with weaker historical investor sentiment outperformed. | |
| Line Graph [Table Text Block] | Class Z Russell 2000 Index S&P 500 Index 12/15 $10,000 $10,000 $10,000 09/16 $10,565 $10,911 $10,606 09/17 $12,280 $13,174 $12,580 09/18 $13,838 $15,181 $14,833 09/19 $12,481 $13,832 $15,464 09/20 $12,077 $13,885 $17,807 09/21 $17,839 $20,506 $23,149 09/22 $14,101 $15,687 $19,568 09/23 $16,110 $17,088 $23,798 09/24 $20,459 $21,661 $32,449 | |
| Average Annual Return [Table Text Block] | 1 Year 5 Years Since Inception 12/29/15 Class Z 26.99 % 10.39 % 8.52 % Russell 2000 Index 26.76 % 9.39 % 9.22 % S&P 500 Index 36.35 % 15.98 % 14.38 % | |
| Performance Inception Date | Dec. 29, 2015 | |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption or sale of Fund shares. | |
| AssetsNet | $ 742,166,244 | 742,166,244 |
| Advisory Fees Paid, Amount | $ 5,416,981 | |
| InvestmentCompanyPortfolioTurnover | 63% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets $742,166,244 # of Portfolio Holdings 229 Portfolio Turnover Rate 63% Total Advisory Fees Paid $5,416,981 | |
| Holdings [Text Block] | Sector Allocation Value Value Health Care 17.4% Financials 17.3% Industrials 17.0% Information Technology 12.6% Consumer Discretionary 10.5% Real Estate 6.4% Energy 5.8% Materials 3.8% Consumer Staples 2.8% Utilities 2.7% Communication Services 2.6% Short-Term Investments 0.7% Other assets less liabilities 0.4% | |
| Largest Holdings [Text Block] | 10 Top Holdings Company U.S. $ Value % of Net Assets Vaxcyte, Inc. $6,872,198 0.9 % Insmed, Inc. $6,053,963 0.8 % Jackson Financial, Inc. - Class A $5,885,612 0.8 % Fabrinet $5,733,670 0.8 % Boot Barn Holdings, Inc. $5,731,013 0.8 % Taylor Morrison Home Corp. $5,626,491 0.8 % Powell Industries, Inc. $5,607,245 0.8 % SPX Technologies, Inc. $5,516,359 0.7 % ACI Worldwide, Inc. $5,431,030 0.7 % SPS Commerce, Inc. $5,378,509 0.7 % Total $57,836,090 7.8 % | |
| Material Fund Change [Text Block] | ||
| C000163293 | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Small Cap Core Portfolio | |
| Class Name | SCB Class | |
| Trading Symbol | SCRSX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the Small Cap Core Portfolio (the “Portfolio”) for the period of October 1, 2023 to September 30, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.abfunds.com/link/AB/SCRSX-A. You can also request this information by contacting us at (800) 227 4618. | |
| Additional Information Phone Number | (800) 227 4618 | |
| Additional Information Website | https://www.abfunds.com/link/AB/SCRSX-A | |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Class Name Cost of a $10,000 investment Costs paid as a percentage of a $10,000 investment SCB Class $129 1.14% | |
| Expenses Paid, Amount | $ 129 | |
| Expense Ratio, Percent | 1.14% | |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year? What affected the Fund’s performance? During the 12-month period ended September 30, 2024, Advisor Class and Class Z shares of the Portfolio outperformed, while SCB Class shares underperformed the Russell 2000 Index (the "benchmark"). From a quantitative perspective, momentum and value factor exposures contributed to performance, relative to the benchmark. Conversely, the Portfolio’s exposure to companies with high profitability detracted from performance as low profitability companies outperformed during the period. Additionally, the Portfolio’s exposure to holdings with strong investor sentiment negatively impacted performance as companies with weaker historical investor sentiment outperformed. | |
| Line Graph [Table Text Block] | SCB Class Russell 2000 Index S&P 500 Index 12/15 $10,000 $10,000 $10,000 09/16 $10,545 $10,911 $10,606 09/17 $12,230 $13,174 $12,580 09/18 $13,751 $15,181 $14,833 09/19 $12,356 $13,832 $15,464 09/20 $11,933 $13,885 $17,807 09/21 $17,579 $20,506 $23,149 09/22 $13,856 $15,687 $19,568 09/23 $15,792 $17,088 $23,798 09/24 $20,004 $21,661 $32,449 | |
| Average Annual Return [Table Text Block] | 1 Year 5 Years Since Inception 12/29/15 SCB Class 26.67 % 10.12 % 8.24 % Russell 2000 Index 26.76 % 9.39 % 9.22 % S&P 500 Index 36.35 % 15.98 % 14.38 % | |
| Performance Inception Date | Dec. 29, 2015 | |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption or sale of Fund shares. | |
| AssetsNet | $ 742,166,244 | $ 742,166,244 |
| Advisory Fees Paid, Amount | $ 5,416,981 | |
| InvestmentCompanyPortfolioTurnover | 63% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets $742,166,244 # of Portfolio Holdings 229 Portfolio Turnover Rate 63% Total Advisory Fees Paid $5,416,981 | |
| Holdings [Text Block] | Sector Allocation Value Value Health Care 17.4% Financials 17.3% Industrials 17.0% Information Technology 12.6% Consumer Discretionary 10.5% Real Estate 6.4% Energy 5.8% Materials 3.8% Consumer Staples 2.8% Utilities 2.7% Communication Services 2.6% Short-Term Investments 0.7% Other assets less liabilities 0.4% | |
| Largest Holdings [Text Block] | 10 Top Holdings Company U.S. $ Value % of Net Assets Vaxcyte, Inc. $6,872,198 0.9 % Insmed, Inc. $6,053,963 0.8 % Jackson Financial, Inc. - Class A $5,885,612 0.8 % Fabrinet $5,733,670 0.8 % Boot Barn Holdings, Inc. $5,731,013 0.8 % Taylor Morrison Home Corp. $5,626,491 0.8 % Powell Industries, Inc. $5,607,245 0.8 % SPX Technologies, Inc. $5,516,359 0.7 % ACI Worldwide, Inc. $5,431,030 0.7 % SPS Commerce, Inc. $5,378,509 0.7 % Total $57,836,090 7.8 % | |
| Material Fund Change [Text Block] |
| Shareholder Report, Line Graph (Details) - USD ($) | 12 Months Ended | ||||||||||
| Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 28, 2015 | Dec. 20, 2015 | |
| C000163285 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Advisor Class | ||||||||||
| Account Value | $ 16,989 | $ 13,547 | $ 11,238 | $ 16,243 | $ 12,474 | $ 12,241 | $ 13,262 | $ 13,062 | $ 10,930 | $ 10,000 | |
| C000163291 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Class Z | ||||||||||
| Account Value | $ 16,979 | 13,538 | 11,242 | 16,248 | 12,477 | 12,243 | 13,264 | 13,063 | 10,930 | 10,000 | |
| C000163292 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | SCB Class | ||||||||||
| Account Value | $ 16,632 | 13,289 | 11,057 | 16,027 | 12,349 | 12,135 | 13,194 | 13,026 | 10,920 | 10,000 | |
| C000163278 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Advisor Class | ||||||||||
| Account Value | $ 17,380 | 13,584 | 11,396 | 15,393 | 12,825 | 12,570 | 13,095 | 12,942 | 10,575 | 10,000 | |
| C000163284 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Class Z | ||||||||||
| Account Value | $ 17,384 | 13,594 | 11,400 | 15,407 | 12,831 | 12,577 | 13,104 | 12,951 | 10,585 | 10,000 | |
| C000163277 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | SCB Class | ||||||||||
| Account Value | $ 17,033 | 13,338 | 11,226 | 15,196 | 12,688 | 12,463 | 13,013 | 12,902 | 10,575 | 10,000 | |
| C000163294 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Advisor Class | ||||||||||
| Account Value | $ 20,433 | 16,094 | 14,079 | 17,826 | 12,075 | 12,470 | 13,840 | 12,287 | 10,565 | $ 10,000 | |
| C000163300 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Class Z | ||||||||||
| Account Value | $ 20,459 | 16,110 | 14,101 | 17,839 | 12,077 | 12,481 | 13,838 | 12,280 | 10,565 | 10,000 | |
| C000163293 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | SCB Class | ||||||||||
| Account Value | $ 20,004 | 15,792 | 13,856 | 17,579 | 11,933 | 12,356 | 13,751 | 12,230 | 10,545 | 10,000 | |
| Alliance Bernstein Index: MSCI ACWI ex USA Index (net) | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | MSCI ACWI ex USA Index (net) | ||||||||||
| Account Value | $ 18,638 | 14,869 | 12,351 | 16,504 | 13,319 | 12,931 | 13,091 | 12,865 | 10,756 | 10,000 | |
| Alliance Bernstein Index: MSCI ACWI ex USA Index (net) | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | MSCI ACWI ex USA Index (net) | ||||||||||
| Account Value | $ 18,638 | 14,869 | 12,351 | 16,504 | 13,319 | 12,931 | 13,091 | 12,865 | 10,756 | 10,000 | |
| Alliance Bernstein Index: MSCI ACWI ex USA Index (net) | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | MSCI ACWI ex USA Index (net) | ||||||||||
| Account Value | $ 18,638 | 14,869 | 12,351 | 16,504 | 13,319 | 12,931 | 13,091 | 12,865 | 10,756 | 10,000 | |
| Alliance Bernstein Index: MSCI ACWI ex USA Index (net) | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | MSCI ACWI ex USA Index (net) | ||||||||||
| Account Value | $ 18,638 | 14,869 | 12,351 | 16,504 | 13,319 | 12,931 | 13,091 | 12,865 | 10,756 | 10,000 | |
| Alliance Bernstein Index: MSCI ACWI ex USA Index (net) | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | MSCI ACWI ex USA Index (net) | ||||||||||
| Account Value | $ 18,638 | 14,869 | 12,351 | 16,504 | 13,319 | 12,931 | 13,091 | 12,865 | 10,756 | 10,000 | |
| Alliance Bernstein Index: MSCI ACWI ex USA Index (net) | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | MSCI ACWI ex USA Index (net) | ||||||||||
| Account Value | $ 18,638 | 14,869 | 12,351 | 16,504 | 13,319 | 12,931 | 13,091 | 12,865 | 10,756 | 10,000 | |
| Alliance Bernstein Index: Russell 2000 Index | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Russell 2000 Index | ||||||||||
| Account Value | $ 21,661 | 17,088 | 15,687 | 20,506 | 13,885 | 13,832 | 15,181 | 13,174 | 10,911 | 10,000 | |
| Alliance Bernstein Index: Russell 2000 Index | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Russell 2000 Index | ||||||||||
| Account Value | $ 21,661 | 17,088 | 15,687 | 20,506 | 13,885 | 13,832 | 15,181 | 13,174 | 10,911 | 10,000 | |
| Alliance Bernstein Index: Russell 2000 Index | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Russell 2000 Index | ||||||||||
| Account Value | $ 21,661 | 17,088 | 15,687 | 20,506 | 13,885 | 13,832 | 15,181 | 13,174 | 10,911 | 10,000 | |
| Alliance Bernstein Index: MSCI ACWI ex USA Small Cap Index (net) | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | MSCI ACWI ex USA Small Cap Index (net) | ||||||||||
| Account Value | $ 18,687 | 15,162 | 12,740 | 17,927 | 13,473 | 12,595 | 13,347 | 13,103 | 10,993 | 10,000 | |
| Alliance Bernstein Index: MSCI ACWI ex USA Small Cap Index (net) | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | MSCI ACWI ex USA Small Cap Index (net) | ||||||||||
| Account Value | $ 18,687 | 15,162 | 12,740 | 17,927 | 13,473 | 12,595 | 13,347 | 13,103 | 10,993 | 10,000 | |
| Alliance Bernstein Index: MSCI ACWI ex USA Small Cap Index (net) | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | MSCI ACWI ex USA Small Cap Index (net) | ||||||||||
| Account Value | $ 18,687 | 15,162 | 12,740 | 17,927 | 13,473 | 12,595 | 13,347 | 13,103 | 10,993 | $ 10,000 | |
| AllianceBernstein Index: S&P 500 Index | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | S&P 500 Index | ||||||||||
| Account Value | $ 32,449 | 23,798 | 19,568 | 23,149 | 17,807 | 15,464 | 14,833 | 12,580 | 10,606 | 10,000 | |
| AllianceBernstein Index: S&P 500 Index | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | S&P 500 Index | ||||||||||
| Account Value | $ 32,449 | 23,798 | 19,568 | 23,149 | 17,807 | 15,464 | 14,833 | 12,580 | 10,606 | 10,000 | |
| AllianceBernstein Index: S&P 500 Index | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | S&P 500 Index | ||||||||||
| Account Value | $ 32,449 | $ 23,798 | $ 19,568 | $ 23,149 | $ 17,807 | $ 15,464 | $ 14,833 | $ 12,580 | $ 10,606 | $ 10,000 |
| Shareholder Report, Average Annual Return (Details) | 12 Months Ended | 60 Months Ended | 105 Months Ended | |
| Sep. 30, 2024 | Sep. 30, 2024 | Sep. 30, 2024 | Sep. 30, 2024 | |
| C000163285 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Advisor Class | |||
| C000163291 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class Z | |||
| C000163292 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | SCB Class | |||
| C000163278 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Advisor Class | |||
| C000163284 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class Z | |||
| C000163277 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | SCB Class | |||
| C000163294 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Advisor Class | |||
| C000163300 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Class Z | |||
| C000163293 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | SCB Class | |||
| Without Sales Load [Member] | C000163285 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 25.41% | 6.77% | 6.22% | |
| Without Sales Load [Member] | C000163291 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 25.42% | 6.76% | 6.22% | |
| Without Sales Load [Member] | C000163292 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 25.15% | 6.51% | 5.97% | |
| Without Sales Load [Member] | C000163278 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 27.95% | 6.70% | 6.50% | |
| Without Sales Load [Member] | C000163284 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 27.88% | 6.69% | 6.50% | |
| Without Sales Load [Member] | C000163277 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 27.71% | 6.45% | 6.25% | |
| Without Sales Load [Member] | C000163294 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 26.96% | 10.38% | 8.50% | |
| Without Sales Load [Member] | C000163300 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 26.99% | 10.39% | 8.52% | |
| Without Sales Load [Member] | C000163293 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 26.67% | 10.12% | 8.24% | |
| Alliance Bernstein Index: MSCI ACWI ex USA Index (net) | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | MSCI ACWI ex USA Index (net) | |||
| Average Annual Return, Percent | 25.35% | 7.59% | 7.35% | |
| Alliance Bernstein Index: MSCI ACWI ex USA Index (net) | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | MSCI ACWI ex USA Index (net) | |||
| Average Annual Return, Percent | 25.35% | 7.59% | 7.35% | |
| Alliance Bernstein Index: MSCI ACWI ex USA Index (net) | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | MSCI ACWI ex USA Index (net) | |||
| Average Annual Return, Percent | 25.35% | 7.59% | 7.35% | |
| Alliance Bernstein Index: MSCI ACWI ex USA Index (net) | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | MSCI ACWI ex USA Index (net) | |||
| Average Annual Return, Percent | 25.35% | 7.59% | 7.35% | |
| Alliance Bernstein Index: MSCI ACWI ex USA Index (net) | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | MSCI ACWI ex USA Index (net) | |||
| Average Annual Return, Percent | 25.35% | 7.59% | 7.35% | |
| Alliance Bernstein Index: MSCI ACWI ex USA Index (net) | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | MSCI ACWI ex USA Index (net) | |||
| Average Annual Return, Percent | 25.35% | 7.59% | 7.35% | |
| Alliance Bernstein Index: Russell 2000 Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Russell 2000 Index | |||
| Average Annual Return, Percent | 26.76% | 9.39% | 9.22% | |
| Alliance Bernstein Index: Russell 2000 Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Russell 2000 Index | |||
| Average Annual Return, Percent | 26.76% | 9.39% | 9.22% | |
| Alliance Bernstein Index: Russell 2000 Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Russell 2000 Index | |||
| Average Annual Return, Percent | 26.76% | 9.39% | 9.22% | |
| Alliance Bernstein Index: MSCI ACWI ex USA Small Cap Index (net) | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | MSCI ACWI ex USA Small Cap Index (net) | |||
| Average Annual Return, Percent | 23.25% | 8.21% | 7.38% | |
| Alliance Bernstein Index: MSCI ACWI ex USA Small Cap Index (net) | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | MSCI ACWI ex USA Small Cap Index (net) | |||
| Average Annual Return, Percent | 23.25% | 8.21% | 7.38% | |
| Alliance Bernstein Index: MSCI ACWI ex USA Small Cap Index (net) | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | MSCI ACWI ex USA Small Cap Index (net) | |||
| Average Annual Return, Percent | 23.25% | 8.21% | 7.38% | |
| AllianceBernstein Index: S&P 500 Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | S&P 500 Index | |||
| Average Annual Return, Percent | 36.35% | 15.98% | 14.38% | |
| AllianceBernstein Index: S&P 500 Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | S&P 500 Index | |||
| Average Annual Return, Percent | 36.35% | 15.98% | 14.38% | |
| AllianceBernstein Index: S&P 500 Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | S&P 500 Index | |||
| Average Annual Return, Percent | 36.35% | 15.98% | 14.38% | |
| Shareholder Report, Holdings (Details) | Sep. 30, 2024 |
| C000163285 | Country SummaryJapan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 25% |
| C000163285 | Country SummaryUnited Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.70% |
| C000163285 | Country SummaryIndia | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| C000163285 | Country SummaryCanada | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.70% |
| C000163285 | Country SummaryTaiwan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| C000163285 | Country SummarySouth Korea | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000163285 | Country SummaryGermany | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000163285 | Country SummaryFrance | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| C000163285 | Country SummaryAustralia | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| C000163285 | Country SummarySweden | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000163285 | Country SummaryChina | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000163285 | Country SummaryDenmark | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000163285 | Country SummarySpain | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000163285 | Country SummarySouth Africa | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.40% |
| C000163285 | Country Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000163285 | 10115144 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000163285 | SectorIndustrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22% |
| C000163285 | SectorConsumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.70% |
| C000163285 | SectorFinancials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.90% |
| C000163285 | SectorInformation Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.10% |
| C000163285 | SectorMaterials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.40% |
| C000163285 | SectorCommunication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| C000163285 | SectorHealth Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000163285 | SectorEnergy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.80% |
| C000163285 | SectorReal Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000163285 | SectorConsumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| C000163285 | SectorUtilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000163285 | SectorShort-Term Investments | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000163285 | Sector Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000163291 | Country SummaryJapan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 25% |
| C000163291 | Country SummaryUnited Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.70% |
| C000163291 | Country SummaryIndia | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| C000163291 | Country SummaryCanada | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.70% |
| C000163291 | Country SummaryTaiwan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| C000163291 | Country SummarySouth Korea | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000163291 | Country SummaryGermany | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000163291 | Country SummaryFrance | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| C000163291 | Country SummaryAustralia | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| C000163291 | Country SummarySweden | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000163291 | Country SummaryChina | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000163291 | Country SummaryDenmark | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000163291 | Country SummarySpain | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000163291 | Country SummarySouth Africa | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.40% |
| C000163291 | Country Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000163291 | 10115144 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000163291 | SectorIndustrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22% |
| C000163291 | SectorConsumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.70% |
| C000163291 | SectorFinancials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.90% |
| C000163291 | SectorInformation Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.10% |
| C000163291 | SectorMaterials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.40% |
| C000163291 | SectorCommunication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| C000163291 | SectorHealth Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000163291 | SectorEnergy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.80% |
| C000163291 | SectorReal Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000163291 | SectorConsumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| C000163291 | SectorUtilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000163291 | SectorShort-Term Investments | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000163291 | Sector Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000163292 | Country SummaryJapan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 25% |
| C000163292 | Country SummaryUnited Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.70% |
| C000163292 | Country SummaryIndia | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| C000163292 | Country SummaryCanada | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.70% |
| C000163292 | Country SummaryTaiwan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.50% |
| C000163292 | Country SummarySouth Korea | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000163292 | Country SummaryGermany | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000163292 | Country SummaryFrance | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| C000163292 | Country SummaryAustralia | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| C000163292 | Country SummarySweden | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000163292 | Country SummaryChina | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000163292 | Country SummaryDenmark | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000163292 | Country SummarySpain | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000163292 | Country SummarySouth Africa | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.40% |
| C000163292 | Country Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000163292 | 10115144 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000163292 | SectorIndustrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22% |
| C000163292 | SectorConsumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.70% |
| C000163292 | SectorFinancials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.90% |
| C000163292 | SectorInformation Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.10% |
| C000163292 | SectorMaterials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.40% |
| C000163292 | SectorCommunication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| C000163292 | SectorHealth Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000163292 | SectorEnergy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.80% |
| C000163292 | SectorReal Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000163292 | SectorConsumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| C000163292 | SectorUtilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000163292 | SectorShort-Term Investments | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000163292 | Sector Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| C000163278 | Country SummaryJapan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.50% |
| C000163278 | Country SummaryUnited Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.30% |
| C000163278 | Country SummaryIndia | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000163278 | Country SummaryCanada | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| C000163278 | Country SummaryTaiwan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| C000163278 | Country SummarySouth Korea | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000163278 | Country SummaryGermany | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000163278 | Country SummaryFrance | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.30% |
| C000163278 | Country SummaryChina | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.90% |
| C000163278 | Country SummaryDenmark | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| C000163278 | Country SummarySpain | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000163278 | Country Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000163278 | Country SummaryUnited States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.10% |
| C000163278 | Country SummaryItaly | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.70% |
| C000163278 | Country SummaryNetherlands | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000163278 | Country SummarySingapore | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| C000163278 | 10115549 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000163278 | SectorIndustrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.10% |
| C000163278 | SectorConsumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.50% |
| C000163278 | SectorFinancials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.10% |
| C000163278 | SectorInformation Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| C000163278 | SectorMaterials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000163278 | SectorCommunication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000163278 | SectorHealth Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.40% |
| C000163278 | SectorEnergy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000163278 | SectorReal Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000163278 | SectorConsumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| C000163278 | SectorUtilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000163278 | SectorShort-Term Investments | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000163278 | Sector Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000163284 | Country SummaryJapan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.50% |
| C000163284 | Country SummaryUnited Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.30% |
| C000163284 | Country SummaryIndia | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000163284 | Country SummaryCanada | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| C000163284 | Country SummaryTaiwan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| C000163284 | Country SummarySouth Korea | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000163284 | Country SummaryGermany | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000163284 | Country SummaryFrance | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.30% |
| C000163284 | Country SummaryChina | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.90% |
| C000163284 | Country SummaryDenmark | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| C000163284 | Country SummarySpain | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000163284 | Country Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000163284 | Country SummaryUnited States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.10% |
| C000163284 | Country SummaryItaly | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.70% |
| C000163284 | Country SummaryNetherlands | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000163284 | Country SummarySingapore | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| C000163284 | 10115549 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000163284 | SectorIndustrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.10% |
| C000163284 | SectorConsumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.50% |
| C000163284 | SectorFinancials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.10% |
| C000163284 | SectorInformation Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| C000163284 | SectorMaterials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000163284 | SectorCommunication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000163284 | SectorHealth Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.40% |
| C000163284 | SectorEnergy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000163284 | SectorReal Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000163284 | SectorConsumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| C000163284 | SectorUtilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000163284 | SectorShort-Term Investments | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000163284 | Sector Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000163277 | Country SummaryJapan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.50% |
| C000163277 | Country SummaryUnited Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.30% |
| C000163277 | Country SummaryIndia | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000163277 | Country SummaryCanada | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| C000163277 | Country SummaryTaiwan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| C000163277 | Country SummarySouth Korea | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000163277 | Country SummaryGermany | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000163277 | Country SummaryFrance | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.30% |
| C000163277 | Country SummaryChina | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.90% |
| C000163277 | Country SummaryDenmark | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| C000163277 | Country SummarySpain | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| C000163277 | Country Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000163277 | Country SummaryUnited States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.10% |
| C000163277 | Country SummaryItaly | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.70% |
| C000163277 | Country SummaryNetherlands | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000163277 | Country SummarySingapore | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| C000163277 | 10115549 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000163277 | SectorIndustrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 18.10% |
| C000163277 | SectorConsumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.50% |
| C000163277 | SectorFinancials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.10% |
| C000163277 | SectorInformation Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14% |
| C000163277 | SectorMaterials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000163277 | SectorCommunication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.20% |
| C000163277 | SectorHealth Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.40% |
| C000163277 | SectorEnergy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| C000163277 | SectorReal Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000163277 | SectorConsumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| C000163277 | SectorUtilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000163277 | SectorShort-Term Investments | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| C000163277 | Sector Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000163294 | Vaxcyte, Inc. - FR_92243G108 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000163294 | Insmed, Inc. - FR_457669307 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000163294 | Jackson Financial, Inc., Class A - FR_46817M107 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000163294 | Fabrinet - FR_G3323L100 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000163294 | Boot Barn Holdings, Inc. - FR_099406100 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000163294 | Taylor Morrison Home Corp. - FR_87724P106 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000163294 | Powell Industries, Inc. - FR_739128106 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000163294 | SPX Technologies, Inc. - FR_78473E103 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000163294 | ACI Worldwide, Inc. - FR_004498101 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000163294 | SPS Commerce, Inc. - FR_78463M107 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000163294 | SectorIndustrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17% |
| C000163294 | SectorConsumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.50% |
| C000163294 | SectorFinancials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.30% |
| C000163294 | SectorInformation Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.60% |
| C000163294 | SectorMaterials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000163294 | SectorCommunication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000163294 | SectorHealth Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.40% |
| C000163294 | SectorEnergy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.80% |
| C000163294 | SectorReal Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000163294 | SectorConsumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000163294 | SectorUtilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000163294 | SectorShort-Term Investments | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000163294 | Sector Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000163300 | Vaxcyte, Inc. - FR_92243G108 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000163300 | Insmed, Inc. - FR_457669307 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000163300 | Jackson Financial, Inc., Class A - FR_46817M107 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000163300 | Fabrinet - FR_G3323L100 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000163300 | Boot Barn Holdings, Inc. - FR_099406100 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000163300 | Taylor Morrison Home Corp. - FR_87724P106 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000163300 | Powell Industries, Inc. - FR_739128106 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000163300 | SPX Technologies, Inc. - FR_78473E103 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000163300 | ACI Worldwide, Inc. - FR_004498101 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000163300 | SPS Commerce, Inc. - FR_78463M107 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000163300 | SectorIndustrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17% |
| C000163300 | SectorConsumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.50% |
| C000163300 | SectorFinancials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.30% |
| C000163300 | SectorInformation Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.60% |
| C000163300 | SectorMaterials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000163300 | SectorCommunication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000163300 | SectorHealth Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.40% |
| C000163300 | SectorEnergy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.80% |
| C000163300 | SectorReal Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000163300 | SectorConsumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000163300 | SectorUtilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000163300 | SectorShort-Term Investments | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000163300 | Sector Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000163293 | Vaxcyte, Inc. - FR_92243G108 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000163293 | Insmed, Inc. - FR_457669307 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000163293 | Jackson Financial, Inc., Class A - FR_46817M107 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000163293 | Fabrinet - FR_G3323L100 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000163293 | Boot Barn Holdings, Inc. - FR_099406100 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000163293 | Taylor Morrison Home Corp. - FR_87724P106 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000163293 | Powell Industries, Inc. - FR_739128106 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| C000163293 | SPX Technologies, Inc. - FR_78473E103 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000163293 | ACI Worldwide, Inc. - FR_004498101 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000163293 | SPS Commerce, Inc. - FR_78463M107 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000163293 | SectorIndustrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17% |
| C000163293 | SectorConsumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.50% |
| C000163293 | SectorFinancials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.30% |
| C000163293 | SectorInformation Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.60% |
| C000163293 | SectorMaterials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| C000163293 | SectorCommunication Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000163293 | SectorHealth Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17.40% |
| C000163293 | SectorEnergy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.80% |
| C000163293 | SectorReal Estate | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.40% |
| C000163293 | SectorConsumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| C000163293 | SectorUtilities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000163293 | SectorShort-Term Investments | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| C000163293 | Sector Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
