| Shareholder Report | 12 Months Ended |
| Sep. 30, 2024 USD ($) Holding |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | Advisors' Inner Circle Fund III |
| Entity Central Index Key | 0001593547 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Sep. 30, 2024 |
| C000223246 | |
| Shareholder Report [Line Items] | |
| Fund Name | SouthernSun Small Cap Fund |
| Class Name | Class N Shares |
| Trading Symbol | SSSFX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class N Shares of the SouthernSun Small Cap Fund (the "Fund") for the period from 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://southernsunam.com/investment-products/small-cap-fund/. You can also request this information by contacting us at 866-392-2626. |
| Additional Information Phone Number | 866-392-2626 |
| Additional Information Website | https://southernsunam.com/investment-products/small-cap-fund/ |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment SouthernSun Small Cap Fund, Class N Shares $146 1.31% |
| Expenses Paid, Amount | $ 146 |
| Expense Ratio, Percent | 1.31% |
| Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? For the 12-month period ended September 30, 2024, the Fund (Class N Shares) returned 23.65%, but underperformed its benchmark, the Russell 3000 TM SouthernSun Management, LLC focuses on building a portfolio of attractively valued, high quality businesses with strong market positions and financial flexibility, led by management teams that are good allocators of capital. We believe that stock selection will be the most important long-term driver of portfolio returns. However, in the past year, movements in equity markets seem to have been driven largely by macroeconomic sentiment in addition to individual company performance. For example, macro pressures in Q2 2024 led to negative returns for small cap equities as uncertainty regarding inflation, interest rates and the economy weighted on markets and caused consumers to remain cautious with spending. Equity markets later responded positively to rate reduction and signals for further cuts, as consumers continue to be restrained, especially regarding spending on big-ticket items. Stock selection within the consumer staples and health care sectors was responsible for the majority of the underperformance during the last year, led by Darling Ingredients Inc. (DAR) and U.S. Physical Therapy, Inc. (USPH), respectively. This was offset, in part, by stock selection within the industrials sector, led by Dycom Industries, Inc. (DY), and our underweight exposure to the energy sector, which posted a negative return for the 12-month period. Looking forward, we believe the market may experience volatility due to the election cycle and potential future reactions to interest rate activity and economic data. Our opinion is that market environments like these create opportunities for active management that truly have a long-term investment horizon. Price dislocations often occur when there is economic uncertainty and price volatility. These dislocations can result in opportunities to add to positions, take profits, or initiate new positions in the portfolio. We take a long-term view, and we will take advantage of what we believe could be short-term price movements, in order to improve the long-term upside for the portfolios. |
| Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
| Line Graph [Table Text Block] | SouthernSun Small Cap Fund, Class N Shares - $20105 Russell 3000 ™ Index (USD)* - $33432 Russell 2000 Index (USD) - $23210 Sep/14 $10000 $10000 $10000 Sep/15 $8106 $9951 $10125 Sep/16 $9158 $11440 $11691 Sep/17 $11162 $13579 $14115 Sep/18 $11075 $15967 $16266 Sep/19 $10249 $16433 $14820 Sep/20 $10176 $18898 $14878 Sep/21 $14920 $24921 $21972 Sep/22 $14277 $20528 $16809 Sep/23 $16259 $24729 $18310 Sep/24 $20105 $33432 $23210 |
| Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years SouthernSun Small Cap Fund, Class N Shares 23.65% 14.43% 7.23% Russell 3000 ™ Index (USD)* 35.19% 15.26% 12.83% Russell 2000 Index (USD) 26.76% 9.39% 8.78% |
| No Deduction of Taxes [Text Block] | The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund Shares. |
| AssetsNet | $ 327,009,022 |
| Holdings Count | Holding | 21 |
| Advisory Fees Paid, Amount | $ 2,326,397 |
| InvestmentCompanyPortfolioTurnover | 17% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets Number of Holdings Total Advisory Fees Paid Portfolio Turnover Rate $327,009,022 21 $2,326,397 17% |
| Holdings [Text Block] | Sector Weightings Footnote Reference Value Value Financials 5.0% Health Care 5.4% Information Technology 7.1% Materials 12.5% Consumer Staples 16.7% Consumer Discretionary 18.1% Industrials 31.5% Footnote Description Footnote * Percentages are calculated based on total net assets. |
| Largest Holdings [Text Block] | Top Ten Holdings Holding Name Percentage of
Total Net Assets Brink's 7.0% Belden 6.5% Darling Ingredients 6.4% MGP Ingredients 6.4% Louisiana-Pacific 6.0% Enerpac Tool Group, Cl A 5.8% Dycom Industries 5.5% US Physical Therapy 5.4% Live Oak Bancshares 5.0% Dorman Products 5.0% |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 866-392-2626 |
| Updated Prospectus Web Address | https://southernsunam.com/investment-products/small-cap-fund/ |
| C000223247 | |
| Shareholder Report [Line Items] | |
| Fund Name | SouthernSun Small Cap Fund |
| Class Name | Class I Shares |
| Trading Symbol | SSSIX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class I Shares of the SouthernSun Small Cap Fund (the "Fund") for the period from 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://southernsunam.com/investment-products/small-cap-fund/. You can also request this information by contacting us at 866-392-2626. |
| Additional Information Phone Number | 866-392-2626 |
| Additional Information Website | https://southernsunam.com/investment-products/small-cap-fund/ |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment SouthernSun Small Cap Fund, Class I Shares $119 1.06% |
| Expenses Paid, Amount | $ 119 |
| Expense Ratio, Percent | 1.06% |
| Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? For the 12-month period ended September 30, 2024, the Fund (Class I Shares) returned 23.98%, but underperformed its benchmark, the Russell 3000 TM SouthernSun Management, LLC focuses on building a portfolio of attractively valued, high quality businesses with strong market positions and financial flexibility, led by management teams that are good allocators of capital. We believe that stock selection will be the most important long-term driver of portfolio returns. However, in the past year, movements in equity markets seem to have been driven largely by macroeconomic sentiment in addition to individual company performance. For example, macro pressures in Q2 2024 led to negative returns for small cap equities as uncertainty regarding inflation, interest rates and the economy weighted on markets and caused consumers to remain cautious with spending. Equity markets later responded positively to rate reduction and signals for further cuts, as consumers continue to be restrained, especially regarding spending on big-ticket items. Stock selection within the consumer staples and health care sectors was responsible for the majority of the underperformance during the last year, led by Darling Ingredients Inc. (DAR) and U.S. Physical Therapy, Inc. (USPH), respectively. This was offset, in part, by stock selection within the industrials sector, led by Dycom Industries, Inc. (DY), and our underweight exposure to the energy sector, which posted a negative return for the 12-month period. Looking forward, we believe the market may experience volatility due to the election cycle and potential future reactions to interest rate activity and economic data. Our opinion is that market environments like these create opportunities for active management that truly have a long-term investment horizon. Price dislocations often occur when there is economic uncertainty and price volatility. These dislocations can result in opportunities to add to positions, take profits, or initiate new positions in the portfolio. We take a long-term view, and we will take advantage of what we believe could be short-term price movements, in order to improve the long-term upside for the portfolios. |
| Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
| Line Graph [Table Text Block] | SouthernSun Small Cap Fund, Class I Shares - $206087 Russell 3000 ™ Index (USD)* - $334317 Russell 2000 Index (USD) - $232101 Sep/14 $100000 $100000 $100000 Sep/15 $81273 $99505 $101246 Sep/16 $92023 $114395 $116906 Sep/17 $112446 $135795 $141155 Sep/18 $111845 $159667 $162664 Sep/19 $103732 $164326 $148205 Sep/20 $103266 $188977 $148783 Sep/21 $151790 $249214 $219719 Sep/22 $145656 $205284 $168090 Sep/23 $166232 $247288 $183100 Sep/24 $206087 $334317 $232101 |
| Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years SouthernSun Small Cap Fund, Class I Shares 23.98% 14.72% 7.50% Russell 3000 ™ Index (USD)* 35.19% 15.26% 12.83% Russell 2000 Index (USD) 26.76% 9.39% 8.78% |
| No Deduction of Taxes [Text Block] | The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund Shares. |
| AssetsNet | $ 327,009,022 |
| Holdings Count | Holding | 21 |
| Advisory Fees Paid, Amount | $ 2,326,397 |
| InvestmentCompanyPortfolioTurnover | 17% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets Number of Holdings Total Advisory Fees Paid Portfolio Turnover Rate $327,009,022 21 $2,326,397 17% |
| Holdings [Text Block] | Sector Weightings Footnote Reference Value Value Financials 5.0% Health Care 5.4% Information Technology 7.1% Materials 12.5% Consumer Staples 16.7% Consumer Discretionary 18.1% Industrials 31.5% Footnote Description Footnote * Percentages are calculated based on total net assets. |
| Largest Holdings [Text Block] | Top Ten Holdings Holding Name Percentage of
Total Net Assets Brink's 7.0% Belden 6.5% Darling Ingredients 6.4% MGP Ingredients 6.4% Louisiana-Pacific 6.0% Enerpac Tool Group, Cl A 5.8% Dycom Industries 5.5% US Physical Therapy 5.4% Live Oak Bancshares 5.0% Dorman Products 5.0% |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 866-392-2626 |
| Updated Prospectus Web Address | https://southernsunam.com/investment-products/small-cap-fund/ |
| C000223248 | |
| Shareholder Report [Line Items] | |
| Fund Name | SouthernSun U.S. Equity Fund |
| Class Name | Class N |
| Trading Symbol | SSEFX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class N Shares of the SouthernSun U.S. Equity Fund (the "Fund") for the period from 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://southernsunam.com/investment-products/. You can also request this information by contacting us at 866-392-2626. |
| Additional Information Phone Number | 866-392-2626 |
| Additional Information Website | https://southernsunam.com/investment-products/ |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment SouthernSun U.S. Equity Fund, Class N Shares $149 1.34% |
| Expenses Paid, Amount | $ 149 |
| Expense Ratio, Percent | 1.34% |
| Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? For the 12-month period ended September 30, 2024, the Fund (Class N Shares) returned 22.33%, but underperformed its benchmark, the Russell 3000 TM SouthernSun Management, LLC focuses on building a portfolio of attractively valued, high quality businesses with strong market positions and financial flexibility, led by management teams that are good allocators of capital. We believe that stock selection will be the most important long-term driver of portfolio returns. However, in the past year, movements in equity markets seem to have been driven largely by macroeconomic sentiment in addition to individual company performance. For example, macro pressures in Q2 2024 led to negative returns for small cap equities as uncertainty regarding inflation, interest rates and the economy weighted on markets and caused consumers to remain cautious with spending. Equity markets later responded positively to rate reduction and signals for further cuts, as consumers continue to be restrained, especially regarding spending on big-ticket items. Stock selection within the consumer staples and health care sectors was responsible for the majority of the underperformance during the last year, led by Darling Ingredients Inc. (DAR) and U.S. Physical Therapy, Inc. (USPH), respectively. This was offset, in part, by stock selection within the industrials sector, led by Dycome Industries, Inc. (DY) and in the consumer discretionary sector, led by Boot Barn Holdings, Inc. (BOOT). Looking forward, we believe the market may experience volatility due to the election cycle and potential future reactions to interest rate activity and economic data. Our opinion is that market environments like these create opportunities for active management that truly have a long-term investment horizon. Price dislocations often occur when there is economic uncertainty and price volatility. These dislocations can result in opportunities to add to positions, take profits, or initiate new positions in the portfolio. We take a long-term view, and we will take advantage of what we believe could be short-term price movements, in order to improve the long-term upside for the portfolios. |
| Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
| Line Graph [Table Text Block] | SouthernSun U.S. Equity Fund, Class N Shares - $19819 Russell 3000 ™ Index (USD)* - $33432 Russell 2500 Index (USD) - $24773 Sep/14 $10000 $10000 $10000 Sep/15 $8680 $9951 $10038 Sep/16 $9733 $11440 $11487 Sep/17 $10873 $13579 $13531 Sep/18 $11114 $15967 $15722 Sep/19 $9835 $16433 $15086 Sep/20 $9996 $18898 $15421 Sep/21 $14390 $24921 $22364 Sep/22 $13793 $20528 $17644 Sep/23 $16201 $24729 $19635 Sep/24 $19819 $33432 $24773 |
| Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years SouthernSun U.S. Equity Fund, Class N Shares 22.33% 15.04% 7.08% Russell 3000 ™ Index (USD)* 35.19% 15.26% 12.83% Russell 2500 Index (USD) 26.17% 10.43% 9.50% |
| No Deduction of Taxes [Text Block] | The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund Shares. |
| AssetsNet | $ 55,929,668 |
| Holdings Count | Holding | 23 |
| Advisory Fees Paid, Amount | $ 334,705 |
| InvestmentCompanyPortfolioTurnover | 27% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets Number of Holdings Total Advisory Fees Paid Portfolio Turnover Rate $55,929,668 23 $334,705 27% |
| Holdings [Text Block] | Sector Weightings Footnote Reference Value Value Health Care 5.1% Information Technology 6.0% Materials 8.5% Consumer Discretionary 15.5% Consumer Staples 16.3% Industrials 45.1% Footnote Description Footnote * Percentages are calculated based on total net assets. |
| Largest Holdings [Text Block] | Top Ten Holdings Holding Name Percentage of
Total Net Assets Brink's 6.4% Darling Ingredients 6.3% MGP Ingredients 6.0% Belden 6.0% Broadridge Financial Solutions 5.6% Louisiana-Pacific 5.5% US Physical Therapy 5.1% Boot Barn Holdings 4.9% Dycom Industries 4.9% Timken 4.6% |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 866-392-2626 |
| Updated Prospectus Web Address | https://southernsunam.com/investment-products/ |
| C000223249 | |
| Shareholder Report [Line Items] | |
| Fund Name | SouthernSun U.S. Equity Fund |
| Class Name | Class I |
| Trading Symbol | SSEIX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class I Shares of the SouthernSun U.S. Equity Fund (the "Fund") for the period from 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://southernsunam.com/investment-products/. You can also request this information by contacting us at 866-392-2626. |
| Additional Information Phone Number | 866-392-2626 |
| Additional Information Website | https://southernsunam.com/investment-products/ |
| Expenses [Text Block] | What were the Fund costs for the last year? (based on a hypothetical $10,000 investment) Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment SouthernSun U.S. Equity Fund, Class I Shares $121 1.09% |
| Expenses Paid, Amount | $ 121 |
| Expense Ratio, Percent | 1.09% |
| Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? For the 12-month period ended September 30, 2024, the Fund (Class I Shares) returned 22.58%, but underperformed its benchmark, the Russell 3000 TM SouthernSun Management, LLC focuses on building a portfolio of attractively valued, high quality businesses with strong market positions and financial flexibility, led by management teams that are good allocators of capital. We believe that stock selection will be the most important long-term driver of portfolio returns. However, in the past year, movements in equity markets seem to have been driven largely by macroeconomic sentiment in addition to individual company performance. For example, macro pressures in Q2 2024 led to negative returns for small cap equities as uncertainty regarding inflation, interest rates and the economy weighted on markets and caused consumers to remain cautious with spending. Equity markets later responded positively to rate reduction and signals for further cuts, as consumers continue to be restrained, especially regarding spending on big-ticket items. Stock selection within the consumer staples and health care sectors was responsible for the majority of the underperformance during the last year, led by Darling Ingredients Inc. (DAR) and U.S. Physical Therapy, Inc. (USPH), respectively. This was offset, in part, by stock selection within the industrials sector, led by Dycome Industries, Inc. (DY) and in the consumer discretionary sector, led by Boot Barn Holdings, Inc. (BOOT). Looking forward, we believe the market may experience volatility due to the election cycle and potential future reactions to interest rate activity and economic data. Our opinion is that market environments like these create opportunities for active management that truly have a long-term investment horizon. Price dislocations often occur when there is economic uncertainty and price volatility. These dislocations can result in opportunities to add to positions, take profits, or initiate new positions in the portfolio. We take a long-term view, and we will take advantage of what we believe could be short-term price movements, in order to improve the long-term upside for the portfolios. |
| Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
| Line Graph [Table Text Block] | SouthernSun U.S. Equity Fund, Class I Shares - $203202 Russell 3000 ™ Index (USD)* - $334317 Russell 2500 Index (USD) - $247726 Sep/14 $100000 $100000 $100000 Sep/15 $87018 $99505 $100379 Sep/16 $97825 $114395 $114869 Sep/17 $109586 $135795 $135307 Sep/18 $112283 $159667 $157218 Sep/19 $99634 $164326 $150859 Sep/20 $101485 $188977 $154207 Sep/21 $146438 $249214 $223644 Sep/22 $140756 $205284 $176438 Sep/23 $165776 $247288 $196348 Sep/24 $203202 $334317 $247726 |
| Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years SouthernSun U.S. Equity Fund, Class I Shares 22.58% 15.32% 7.35% Russell 3000 ™ Index (USD)* 35.19% 15.26% 12.83% Russell 2500 Index (USD) 26.17% 10.43% 9.50% |
| No Deduction of Taxes [Text Block] | The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund Shares. |
| AssetsNet | $ 55,929,668 |
| Holdings Count | Holding | 23 |
| Advisory Fees Paid, Amount | $ 334,705 |
| InvestmentCompanyPortfolioTurnover | 27% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets Number of Holdings Total Advisory Fees Paid Portfolio Turnover Rate $55,929,668 23 $334,705 27% |
| Holdings [Text Block] | Sector Weightings Footnote Reference Value Value Health Care 5.1% Information Technology 6.0% Materials 8.5% Consumer Discretionary 15.5% Consumer Staples 16.3% Industrials 45.1% Footnote Description Footnote * Percentages are calculated based on total net assets. |
| Largest Holdings [Text Block] | Top Ten Holdings Holding Name Percentage of
Total Net Assets Brink's 6.4% Darling Ingredients 6.3% MGP Ingredients 6.0% Belden 6.0% Broadridge Financial Solutions 5.6% Louisiana-Pacific 5.5% US Physical Therapy 5.1% Boot Barn Holdings 4.9% Dycom Industries 4.9% Timken 4.6% |
| Material Fund Change [Text Block] | |
| Updated Prospectus Phone Number | 866-392-2626 |
| Updated Prospectus Web Address | https://southernsunam.com/investment-products/ |
