| Shareholder Report | 12 Months Ended |
| Oct. 31, 2024 USD ($) Holding | Oct. 31, 2023 |
| Shareholder Report [Line Items] | | |
| Document Type | N-CSR | |
| Amendment Flag | false | |
| Registrant Name | CREDIT SUISSE OPPORTUNITY
FUNDS | |
| Entity Central Index Key | 0000946110 | |
| Entity Investment Company Type | N-1A | |
| Document Period End Date | Oct. 31, 2024 | |
| C000110883 | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Credit Suisse Multialternative Strategy Fund | |
| Class Name | Class A | |
| Trading Symbol | CSQAX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Credit Suisse Multialternative Strategy Fund (the "Fund") for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://us-fund.credit-suisse.com/CSQAX. You can also request this information by contacting us at 877-870-2874. | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 877-870-2874 | |
| Additional Information Website | https://us-fund.credit-suisse.com/CSQAX | |
| Expenses Paid, Amount | $ 111 | |
| Expense Ratio, Percent | 1.10% | |
| Performance Past Does Not Indicate Future [Text] | Performance data represents past performance, which does not guarantee future results. The graph and table assume the maximum sales charge and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or a redemption of Fund shares.</p>" id="sjs-B23"><p style="box-sizing: border-box; color: rgb(0, 82, 136); display: block; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">Performance data represents past performance, which does not guarantee future results. The graph and table assume the maximum sales charge and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or a redemption of Fund shares.</p> | |
| Material Change Date | | Oct. 31, 2023 |
| AssetsNet | $ 232,710,152 | |
| Holdings Count | Holding | 283 | |
| Advisory Fees Paid, Amount | $ 2,469,409 | |
| InvestmentCompanyPortfolioTurnover | 214% | |
| Material Fund Change Name [Text Block] | On August 16, 2024, UBS AM entered into an agreement with Manteio Scalable Technologies LLC (“Manteio”), Manteio Capital LLC and Manteio Partners LLC to transfer management of UBS AM’s Quantitative Investment Strategies business, including the portfolio management team of the Fund, to Manteio (the “Transaction”). At a meeting held on August 15, 2024, the Board of the Trust approved an Agreement and Plan of Reorganization (the “Agreement and Plan”) pursuant to which the Fund would be reorganized into Manteio Multialternative Strategy Fund, a newly created mutual fund advised by Manteio (the “Reorganization”). At a Special Meeting of Shareholders of the Fund on November 15, 2024, shareholders of the Fund approved the Agreement and Plan. The Reorganization closed on November 22, 2024 (the “Closing Date”). As a result of the Reorganization, the Manteio Multialternative Strategy Fund acquired the assets, subject to the liabilities, of the Fund, and shareholders of the Fund became shareholders of the Manteio Multialternative Strategy Fund as of the Closing Date. | |
| Material Fund Change Adviser [Text Block] | On May 1, 2024, Credit Suisse Asset Management, LLC (“Credit Suisse”) merged into UBS Asset Management (Americas) LLC (“UBS AM (Americas)”), with UBS AM (Americas) as the surviving entity, and UBS AM (Americas) became the investment manager to the Fund. Also on May 1, 2024, UBS Asset Management (US) Inc. replaced Credit Suisse Securities (USA) LLC as the Fund’s underwriter and distributor. | |
| Summary of Change Legend [Text Block] | The below is a summary of certain changes that occurred since the Fund's prior fiscal year ended October 31, 2023. | |
| Updated Prospectus Phone Number | 877-870-2874 | |
| C000110885 | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Credit Suisse Multialternative Strategy Fund | |
| Class Name | Class I | |
| Trading Symbol | CSQIX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Credit Suisse Multialternative Strategy Fund (the "Fund") for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://us-fund.credit-suisse.com/CSQIX. You can also request this information by contacting us at 877-870-2874. | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 877-870-2874 | |
| Additional Information Website | https://us-fund.credit-suisse.com/CSQIX | |
| Expenses Paid, Amount | $ 86 | |
| Expense Ratio, Percent | 0.85% | |
| Performance Past Does Not Indicate Future [Text] | Performance data represents past performance, which does not guarantee future results. The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or a redemption of Fund shares.</p>" id="sjs-B46"><p style="box-sizing: border-box; color: rgb(0, 82, 136); display: block; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">Performance data represents past performance, which does not guarantee future results. The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or a redemption of Fund shares.</p> | |
| Material Change Date | | Oct. 31, 2023 |
| AssetsNet | $ 232,710,152 | |
| Holdings Count | Holding | 283 | |
| Advisory Fees Paid, Amount | $ 2,469,409 | |
| InvestmentCompanyPortfolioTurnover | 214% | |
| Material Fund Change Name [Text Block] | On August 16, 2024, UBS AM entered into an agreement with Manteio Scalable Technologies LLC (“Manteio”), Manteio Capital LLC and Manteio Partners LLC to transfer management of UBS AM’s Quantitative Investment Strategies business, including the portfolio management team of the Fund, to Manteio (the “Transaction”). At a meeting held on August 15, 2024, the Board of the Trust approved an Agreement and Plan of Reorganization (the “Agreement and Plan”) pursuant to which the Fund would be reorganized into Manteio Multialternative Strategy Fund, a newly created mutual fund advised by Manteio (the “Reorganization”). At a Special Meeting of Shareholders of the Fund on November 15, 2024, shareholders of the Fund approved the Agreement and Plan. The Reorganization closed on November 22, 2024 (the “Closing Date”). As a result of the Reorganization, the Manteio Multialternative Strategy Fund acquired the assets, subject to the liabilities, of the Fund, and shareholders of the Fund became shareholders of the Manteio Multialternative Strategy Fund as of the Closing Date. | |
| Material Fund Change Adviser [Text Block] | On May 1, 2024, Credit Suisse Asset Management, LLC (“Credit Suisse”) merged into UBS Asset Management (Americas) LLC (“UBS AM (Americas)”), with UBS AM (Americas) as the surviving entity, and UBS AM (Americas) became the investment manager to the Fund. Also on May 1, 2024, UBS Asset Management (US) Inc. replaced Credit Suisse Securities (USA) LLC as the Fund’s underwriter and distributor. | |
| Summary of Change Legend [Text Block] | The below is a summary of certain changes that occurred since the Fund's prior fiscal year ended October 31, 2023. | |
| Updated Prospectus Phone Number | 877-870-2874 | |
| C000029053 | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Credit Suisse Floating Rate High Income Fund | |
| Class Name | Class A | |
| Trading Symbol | CHIAX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Credit Suisse Floating Rate High Income Fund (the "Fund") for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://us-fund.credit-suisse.com/CHIAX. You can also request this information by contacting us at 877-870-2874. | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 877-870-2874 | |
| Additional Information Website | https://us-fund.credit-suisse.com/CHIAX | |
| Expenses [Text Block] | What were the Fund costs for the last year? Annual Fund Operating Expenses (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $99 0.95% | |
| Expenses Paid, Amount | $ 99 | |
| Expense Ratio, Percent | 0.95% | |
| Factors Affecting Performance [Text Block] | How did the fund perform last year and what affected its performance? Portfolio performance summary What worked: - Asset allocation to High Yield and Collateralized Loan Obligation asset classes positively contributed to relative returns. - Positive selection within the Aerospace, Information Technology, Transportation and Metals/Minerals sectors were the greatest contributors to sector attribution. - From ratings perspective, there was positive selection in the Caa3, B3 and B1 ratings categories. What didn’t work: - The Fund experienced negative selection from Media/Telecommunication, Service, Chemicals, Manufacturing and Financial sectors. - From a ratings perspective, there was negative selection from Caa2, C and Ca-rated investments. | |
| Performance Past Does Not Indicate Future [Text] | Performance data represents past performance, which does not guarantee future results. The graph and table assume the maximum sales charge and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or a redemption of Fund shares.</p>" id="sjs-B71"><p style="box-sizing: border-box; color: rgb(0, 82, 136); display: block; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">Performance data represents past performance, which does not guarantee future results. The graph and table assume the maximum sales charge and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or a redemption of Fund shares.</p> | |
| Line Graph [Table Text Block] | Class A with load Credit Suisse Leveraged Loan Index 10/31/2014 $9,530 $10,000 10/31/2015 $9,729 $10,081 10/31/2016 $10,266 $10,716 10/31/2017 $10,828 $11,279 10/31/2018 $11,207 $11,830 10/31/2019 $11,313 $12,139 10/31/2020 $11,391 $12,321 10/31/2021 $12,367 $13,372 10/31/2022 $12,061 $13,101 10/31/2023 $13,396 $14,615 10/31/2024 $14,659 $16,156 | |
| Average Annual Return [Table Text Block] | Name 1 Year 5 Years 10 Years Class A 9.43% 5.32% 4.40% Class A with load 4.16% 4.29% 3.90% Credit Suisse Leveraged Loan Index 10.55% 5.89% 4.91% | |
| Material Change Date | | Oct. 31, 2023 |
| AssetsNet | $ 1,971,472,265 | |
| Holdings Count | Holding | 438 | |
| Advisory Fees Paid, Amount | $ 9,782,023 | |
| InvestmentCompanyPortfolioTurnover | 50% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $1,971,472,265 # of Portfolio Holdings 438 Portfolio Turnover Rate 50% Total Advisory Fees Paid $9,782,023 | |
| Holdings [Text Block] | Portfolio Breakdown (% of Total Investments) Bank Loans 82.3% Corporate Bonds 6.5 Short-Term Investments 6.5 Asset Backed Securities 3.9 Common Stocks 0.8 Warrants 0.0 Derivatives are not reflected in amounts reported above. | |
| Largest Holdings [Text Block] | Credit Quality Breakdown Footnote Reference * (% of Total Investments) S&P Ratings Footnote Reference ** Value A 0.1% A+ 0.1 B 30.4 B- 10.4 B+ 8.5 BB 14.4 BB- 5.7 BB+ 3.0 BBB 0.4 BBB- 4.4 C 0.1 CC 0.3 CCC 2.4 CCC- 1.0 CCC+ 4.1 D 0.1 NR 7.1 Subtotal 92.5 Equity and Other 7.5 Total 100.0% Footnote Description Footnote * Expressed as a percentage of total investments (excluding securities lending collateral, if applicable) and may vary over time. Footnote ** Credit Quality is based on ratings provided by the S&P Global Ratings Division of S&P Global Inc. ("S&P"). S&P is a main provider of ratings for credit asset classes and is widely used amongst industry participants. The NR category consists of securities that have not been rated by S&P. Derivatives are not reflected in amounts reported above. | |
| Material Fund Change [Text Block] | Material Fund Changes The below is a summary of certain changes that occurred since the Fund's prior fiscal year ended October 31, 2023. On May 1, 2024, Credit Suisse Asset Management, LLC (“Credit Suisse”) merged into UBS Asset Management (Americas) LLC (“UBS AM (Americas)”), with UBS AM (Americas) as the surviving entity, and UBS AM (Americas) became the investment manager to the Fund. Also on May 1, 2024, UBS Asset Management (US) Inc. replaced Credit Suisse Securities (USA) LLC as the Fund’s underwriter and distributor. | |
| Material Fund Change Adviser [Text Block] | On May 1, 2024, Credit Suisse Asset Management, LLC (“Credit Suisse”) merged into UBS Asset Management (Americas) LLC (“UBS AM (Americas)”), with UBS AM (Americas) as the surviving entity, and UBS AM (Americas) became the investment manager to the Fund. Also on May 1, 2024, UBS Asset Management (US) Inc. replaced Credit Suisse Securities (USA) LLC as the Fund’s underwriter and distributor. | |
| Summary of Change Legend [Text Block] | The below is a summary of certain changes that occurred since the Fund's prior fiscal year ended October 31, 2023. | |
| Updated Prospectus Phone Number | 877-870-2874 | |
| C000029055 | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Credit Suisse Floating Rate High Income Fund | |
| Class Name | Class C | |
| Trading Symbol | CHICX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Credit Suisse Floating Rate High Income Fund (the "Fund") for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://us-fund.credit-suisse.com/CHICX. You can also request this information by contacting us at 877-870-2874. | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 877-870-2874 | |
| Additional Information Website | https://us-fund.credit-suisse.com/CHICX | |
| Expenses [Text Block] | What were the Fund costs for the last year? Annual Fund Operating Expenses (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $177 1.70% | |
| Expenses Paid, Amount | $ 177 | |
| Expense Ratio, Percent | 1.70% | |
| Factors Affecting Performance [Text Block] | How did the fund perform last year and what affected its performance? Portfolio performance summary What worked: - Asset allocation to High Yield and Collateralized Loan Obligation asset classes positively contributed to relative returns. - Positive selection within the Aerospace, Information Technology, Transportation and Metals/Minerals sectors were the greatest contributors to sector attribution. - From ratings perspective, there was positive selection in the Caa3, B3 and B1 ratings categories. What didn’t work: - The Fund experienced negative selection from Media/Telecommunication, Service, Chemicals, Manufacturing and Financial sectors. - From a ratings perspective, there was negative selection from Caa2, C and Ca-rated investments. | |
| Performance Past Does Not Indicate Future [Text] | Performance data represents past performance, which does not guarantee future results. The graph and table assume the maximum deferred sales charge and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or a redemption of Fund shares.</p>" id="sjs-B101"><p style="box-sizing: border-box; color: rgb(0, 82, 136); display: block; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">Performance data represents past performance, which does not guarantee future results. The graph and table assume the maximum deferred sales charge and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or a redemption of Fund shares.</p> | |
| Line Graph [Table Text Block] | Class C with load Credit Suisse Leveraged Loan Index 10/31/2014 $10,000 $10,000 10/31/2015 $10,133 $10,081 10/31/2016 $10,613 $10,716 10/31/2017 $11,111 $11,279 10/31/2018 $11,414 $11,830 10/31/2019 $11,437 $12,139 10/31/2020 $11,431 $12,321 10/31/2021 $12,335 $13,372 10/31/2022 $11,924 $13,101 10/31/2023 $13,146 $14,615 10/31/2024 $14,278 $16,156 | |
| Average Annual Return [Table Text Block] | Name 1 Year 5 Years 10 Years Class C 8.61% 4.54% 3.63% Class C with load 7.61% 4.54% 3.63% Credit Suisse Leveraged Loan Index 10.55% 5.89% 4.91% | |
| Material Change Date | | Oct. 31, 2023 |
| AssetsNet | $ 1,971,472,265 | |
| Holdings Count | Holding | 438 | |
| Advisory Fees Paid, Amount | $ 9,782,023 | |
| InvestmentCompanyPortfolioTurnover | 50% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $1,971,472,265 # of Portfolio Holdings 438 Portfolio Turnover Rate 50% Total Advisory Fees Paid $9,782,023 | |
| Holdings [Text Block] | Portfolio Breakdown (% of Total Investments) Bank Loans 82.3% Corporate Bonds 6.5 Short-Term Investments 6.5 Asset Backed Securities 3.9 Common Stocks 0.8 Warrants 0.0 Derivatives are not reflected in amounts reported above. | |
| Largest Holdings [Text Block] | Credit Quality Breakdown Footnote Reference * (% of Total Investments) S&P Ratings Footnote Reference ** Value A 0.1% A+ 0.1 B 30.4 B- 10.4 B+ 8.5 BB 14.4 BB- 5.7 BB+ 3.0 BBB 0.4 BBB- 4.4 C 0.1 CC 0.3 CCC 2.4 CCC- 1.0 CCC+ 4.1 D 0.1 NR 7.1 Subtotal 92.5 Equity and Other 7.5 Total 100.0% Footnote Description Footnote * Expressed as a percentage of total investments (excluding securities lending collateral, if applicable) and may vary over time. Footnote ** Credit Quality is based on ratings provided by the S&P Global Ratings Division of S&P Global Inc. ("S&P"). S&P is a main provider of ratings for credit asset classes and is widely used amongst industry participants. The NR category consists of securities that have not been rated by S&P. Derivatives are not reflected in amounts reported above. | |
| Material Fund Change [Text Block] | Material Fund Changes The below is a summary of certain changes that occurred since the Fund's prior fiscal year ended October 31, 2023. On May 1, 2024, Credit Suisse Asset Management, LLC (“Credit Suisse”) merged into UBS Asset Management (Americas) LLC (“UBS AM (Americas)”), with UBS AM (Americas) as the surviving entity, and UBS AM (Americas) became the investment manager to the Fund. Also on May 1, 2024, UBS Asset Management (US) Inc. replaced Credit Suisse Securities (USA) LLC as the Fund’s underwriter and distributor. | |
| Material Fund Change Adviser [Text Block] | On May 1, 2024, Credit Suisse Asset Management, LLC (“Credit Suisse”) merged into UBS Asset Management (Americas) LLC (“UBS AM (Americas)”), with UBS AM (Americas) as the surviving entity, and UBS AM (Americas) became the investment manager to the Fund. Also on May 1, 2024, UBS Asset Management (US) Inc. replaced Credit Suisse Securities (USA) LLC as the Fund’s underwriter and distributor. | |
| Summary of Change Legend [Text Block] | The below is a summary of certain changes that occurred since the Fund's prior fiscal year ended October 31, 2023. | |
| Updated Prospectus Phone Number | 877-870-2874 | |
| C000029052 | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Credit Suisse Floating Rate High Income Fund | |
| Class Name | Class I | |
| Trading Symbol | CSHIX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Credit Suisse Floating Rate High Income Fund (the "Fund") for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://us-fund.credit-suisse.com/CSHIX. You can also request this information by contacting us at 877-870-2874. | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 877-870-2874 | |
| Additional Information Website | https://us-fund.credit-suisse.com/CSHIX | |
| Expenses [Text Block] | What were the Fund costs for the last year? Annual Fund Operating Expenses (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $73 0.70% | |
| Expenses Paid, Amount | $ 73 | |
| Expense Ratio, Percent | 0.70% | |
| Factors Affecting Performance [Text Block] | How did the fund perform last year and what affected its performance? Portfolio performance summary What worked: - Asset allocation to High Yield and Collateralized Loan Obligation asset classes positively contributed to relative returns. - Positive selection within the Aerospace, Information Technology, Transportation and Metals/Minerals sectors were the greatest contributors to sector attribution. - From ratings perspective, there was positive selection in the Caa3, B3 and B1 ratings categories. What didn’t work: - The Fund experienced negative selection from Media/Telecommunication, Service, Chemicals, Manufacturing and Financial sectors. - From a ratings perspective, there was negative selection from Caa2, C and Ca-rated investments. | |
| Performance Past Does Not Indicate Future [Text] | Performance data represents past performance, which does not guarantee future results. The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or a redemption of Fund shares.</p>" id="sjs-B131"><p style="box-sizing: border-box; color: rgb(0, 82, 136); display: block; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">Performance data represents past performance, which does not guarantee future results. The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or a redemption of Fund shares.</p> | |
| Line Graph [Table Text Block] | Class I Credit Suisse Leveraged Loan Index 10/31/2014 $10,000 $10,000 10/31/2015 $10,233 $10,081 10/31/2016 $10,809 $10,716 10/31/2017 $11,448 $11,279 10/31/2018 $11,861 $11,830 10/31/2019 $12,017 $12,139 10/31/2020 $12,128 $12,321 10/31/2021 $13,202 $13,372 10/31/2022 $12,904 $13,101 10/31/2023 $14,369 $14,615 10/31/2024 $15,762 $16,156 | |
| Average Annual Return [Table Text Block] | Name 1 Year 5 Years 10 Years Class I 9.70% 5.58% 4.66% Credit Suisse Leveraged Loan Index 10.55% 5.89% 4.91% | |
| Material Change Date | | Oct. 31, 2023 |
| AssetsNet | $ 1,971,472,265 | |
| Holdings Count | Holding | 438 | |
| Advisory Fees Paid, Amount | $ 9,782,023 | |
| InvestmentCompanyPortfolioTurnover | 50% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $1,971,472,265 # of Portfolio Holdings 438 Portfolio Turnover Rate 50% Total Advisory Fees Paid $9,782,023 | |
| Holdings [Text Block] | Portfolio Breakdown (% of Total Investments) Bank Loans 82.3% Corporate Bonds 6.5 Short-Term Investments 6.5 Asset Backed Securities 3.9 Common Stocks 0.8 Warrants 0.0 Derivatives are not reflected in amounts reported above. | |
| Largest Holdings [Text Block] | Credit Quality Breakdown Footnote Reference * (% of Total Investments) S&P Ratings Footnote Reference ** Value A 0.1% A+ 0.1 B 30.4 B- 10.4 B+ 8.5 BB 14.4 BB- 5.7 BB+ 3.0 BBB 0.4 BBB- 4.4 C 0.1 CC 0.3 CCC 2.4 CCC- 1.0 CCC+ 4.1 D 0.1 NR 7.1 Subtotal 92.5 Equity and Other 7.5 Total 100.0% Footnote Description Footnote * Expressed as a percentage of total investments (excluding securities lending collateral, if applicable) and may vary over time. Footnote ** Credit Quality is based on ratings provided by the S&P Global Ratings Division of S&P Global Inc. ("S&P"). S&P is a main provider of ratings for credit asset classes and is widely used amongst industry participants. The NR category consists of securities that have not been rated by S&P. Derivatives are not reflected in amounts reported above. | |
| Material Fund Change [Text Block] | Material Fund Changes The below is a summary of certain changes that occurred since the Fund's prior fiscal year ended October 31, 2023. On May 1, 2024, Credit Suisse Asset Management, LLC (“Credit Suisse”) merged into UBS Asset Management (Americas) LLC (“UBS AM (Americas)”), with UBS AM (Americas) as the surviving entity, and UBS AM (Americas) became the investment manager to the Fund. Also on May 1, 2024, UBS Asset Management (US) Inc. replaced Credit Suisse Securities (USA) LLC as the Fund’s underwriter and distributor. | |
| Material Fund Change Adviser [Text Block] | On May 1, 2024, Credit Suisse Asset Management, LLC (“Credit Suisse”) merged into UBS Asset Management (Americas) LLC (“UBS AM (Americas)”), with UBS AM (Americas) as the surviving entity, and UBS AM (Americas) became the investment manager to the Fund. Also on May 1, 2024, UBS Asset Management (US) Inc. replaced Credit Suisse Securities (USA) LLC as the Fund’s underwriter and distributor. | |
| Summary of Change Legend [Text Block] | The below is a summary of certain changes that occurred since the Fund's prior fiscal year ended October 31, 2023. | |
| Updated Prospectus Phone Number | 877-870-2874 | |
| C000118321 | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Credit Suisse Managed Futures Strategy Fund | |
| Class Name | Class A | |
| Trading Symbol | CSAAX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Credit Suisse Managed Futures Strategy Fund (the "Fund") for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://us-fund.credit-suisse.com/CSAAX. You can also request this information by contacting us at 877-870-2874. | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 877-870-2874 | |
| Additional Information Website | https://us-fund.credit-suisse.com/CSAAX | |
| Expenses [Text Block] | What were the Fund costs for the last year? Annual Fund Operating Expenses (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $148 1.55% | |
| Expenses Paid, Amount | $ 148 | |
| Expense Ratio, Percent | 1.55% | |
| Factors Affecting Performance [Text Block] | How did the fund perform last year and what affected its performance? Portfolio performance summary What worked: Long-biased equity futures trading: Resilient corporate earnings, the intensification of pro-growth Chinese policy measures, and indications of easing inflationary pressure joined with money manager fear of missing out to send global equity markets higher to the benefit of the Fund. Commodity swap trading also contributed, albeit modestly: Short-biased Agriculture exposure generated gains as supportive weather conditions and diminishing demand for ethanol feedstocks weighed on prices. What didn’t work: Mercurial positioning in currencies futures: With developed market monetary policy desynchronizing, investors paid particular attention to the rate of change in economic conditions in the US versus the rest of the G7 and to the impending US elections, as the Bank of Japan generally struck a gradualist tone in seeking to normalize monetary policy without spooking markets. The Fund’s exposure in the asset class shifted frequently and unprofitably. Whipsawing fixed income futures trading: Fixed income markets flip-flopped as markets absorbed indications of lingering inflationary pressures even as volatile employment data, dwindling consumer confidence, and softening economic data left little doubt that higher for longer interest rates were closing in on their target and perhaps overshooting. | |
| Performance Past Does Not Indicate Future [Text] | Performance data represents past performance, which does not guarantee future results. The graph and table assume the maximum sales charge and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or a redemption of Fund shares.</p>" id="sjs-B161"><p style="box-sizing: border-box; color: rgb(0, 82, 136); display: block; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">Performance data represents past performance, which does not guarantee future results. The graph and table assume the maximum sales charge and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or a redemption of Fund shares.</p> | |
| Line Graph [Table Text Block] | Class A with load Credit Suisse Managed Futures Liquid Index Bloomberg Global Aggregate Bond Fund Index 10/31/2014 $9,474 $10,000 $10,000 10/31/2015 $10,655 $11,336 $9,693 10/31/2016 $10,961 $11,725 $10,234 10/31/2017 $10,764 $11,468 $10,355 10/31/2018 $10,019 $10,652 $10,143 10/31/2019 $10,154 $10,808 $11,110 10/31/2020 $9,593 $10,223 $11,736 10/31/2021 $11,419 $12,225 $11,590 10/31/2022 $13,797 $14,902 $9,181 10/31/2023 $12,672 $13,751 $9,339 10/31/2024 $11,525 $12,470 $10,230 | |
| Average Annual Return [Table Text Block] | Name 1 Year 5 Years 10 Years Class A (9.06%) 2.56% 1.98% Class A with load (13.85%) 1.47% 1.43% Credit Suisse Managed Futures Liquid Index (9.31%) 2.90% 2.23% Bloomberg Global Aggregate Bond Fund Index 9.55% (1.64%) 0.23% | |
| Material Change Date | | Oct. 31, 2023 |
| AssetsNet | $ 201,552,407 | |
| Holdings Count | Holding | 13 | |
| Advisory Fees Paid, Amount | $ 1,878,310 | |
| InvestmentCompanyPortfolioTurnover | 0% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $201,552,407 # of Portfolio Holdings 13 Portfolio Turnover Rate 0% Total Advisory Fees Paid $1,878,310 | |
| Holdings [Text Block] | Portfolio Breakdown (% of Total Investments) United States Treasury Obligations 82.8% Short-Term Investments 17.2 Derivatives are not reflected in amounts reported above. | |
| Material Fund Change [Text Block] | Material Fund Changes The below is a summary of certain changes that occurred since the Fund's prior fiscal year ended October 31, 2023. On May 1, 2024, Credit Suisse Asset Management, LLC (“Credit Suisse”) merged into UBS Asset Management (Americas) LLC (“UBS AM (Americas)”), with UBS AM (Americas) as the surviving entity, and UBS AM (Americas) became the investment manager to the Fund. Also on May 1, 2024, UBS Asset Management (US) Inc. replaced Credit Suisse Securities (USA) LLC as the Fund’s underwriter and distributor. On August 16, 2024, UBS (Americas) entered into an agreement with Manteio Scalable Technologies LLC (“Manteio”), Manteio Capital LLC and Manteio Partners LLC to transfer management of UBS (Americas)’s Quantitative Investment Strategies business, including the portfolio management team of the Fund, to Manteio (the “Transaction”). At a meeting held on August 15, 2024, the Board of the Trust approved an Agreement and Plan of Reorganization (the “Agreement and Plan”) pursuant to which the Fund would be reorganized into Manteio Managed Futures Strategy Fund, a newly created mutual fund advised by Manteio (the “Reorganization”). At a Special Meeting of Shareholders of the Fund on November 15, 2024, shareholders of the Fund approved the Agreement and Plan. The Reorganization closed on November 22, 2024 (the “Closing Date”). As a result of the Reorganization, the Manteio Managed Futures Strategy Fund acquired the assets, subject to the liabilities, of the Fund, and shareholders of the Fund became shareholders of the Manteio Managed Futures Strategy Fund as of the Closing Date. | |
| Material Fund Change Name [Text Block] | On August 16, 2024, UBS (Americas) entered into an agreement with Manteio Scalable Technologies LLC (“Manteio”), Manteio Capital LLC and Manteio Partners LLC to transfer management of UBS (Americas)’s Quantitative Investment Strategies business, including the portfolio management team of the Fund, to Manteio (the “Transaction”). At a meeting held on August 15, 2024, the Board of the Trust approved an Agreement and Plan of Reorganization (the “Agreement and Plan”) pursuant to which the Fund would be reorganized into Manteio Managed Futures Strategy Fund, a newly created mutual fund advised by Manteio (the “Reorganization”). At a Special Meeting of Shareholders of the Fund on November 15, 2024, shareholders of the Fund approved the Agreement and Plan. The Reorganization closed on November 22, 2024 (the “Closing Date”). As a result of the Reorganization, the Manteio Managed Futures Strategy Fund acquired the assets, subject to the liabilities, of the Fund, and shareholders of the Fund became shareholders of the Manteio Managed Futures Strategy Fund as of the Closing Date. | |
| Material Fund Change Adviser [Text Block] | On May 1, 2024, Credit Suisse Asset Management, LLC (“Credit Suisse”) merged into UBS Asset Management (Americas) LLC (“UBS AM (Americas)”), with UBS AM (Americas) as the surviving entity, and UBS AM (Americas) became the investment manager to the Fund. Also on May 1, 2024, UBS Asset Management (US) Inc. replaced Credit Suisse Securities (USA) LLC as the Fund’s underwriter and distributor. | |
| Summary of Change Legend [Text Block] | The below is a summary of certain changes that occurred since the Fund's prior fiscal year ended October 31, 2023. | |
| Updated Prospectus Phone Number | 877-870-2874 | |
| C000120617 | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Credit Suisse Managed Futures Strategy Fund | |
| Class Name | Class C | |
| Trading Symbol | CSACX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Credit Suisse Managed Futures Strategy Fund (the "Fund") for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://us-fund.credit-suisse.com/CSACX. You can also request this information by contacting us at 877-870-2874. | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 877-870-2874 | |
| Additional Information Website | https://us-fund.credit-suisse.com/CSACX | |
| Expenses [Text Block] | What were the Fund costs for the last year? Annual Fund Operating Expenses (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $219 2.30% | |
| Expenses Paid, Amount | $ 219 | |
| Expense Ratio, Percent | 2.30% | |
| Factors Affecting Performance [Text Block] | How did the fund perform last year and what affected its performance? Portfolio performance summary What worked: Long-biased equity futures trading: Resilient corporate earnings, the intensification of pro-growth Chinese policy measures, and indications of easing inflationary pressure joined with money manager fear of missing out to send global equity markets higher to the benefit of the Fund. Commodity swap trading also contributed, albeit modestly: Short-biased Agriculture exposure generated gains as supportive weather conditions and diminishing demand for ethanol feedstocks weighed on prices. What didn’t work: Mercurial positioning in currencies futures: With developed market monetary policy desynchronizing, investors paid particular attention to the rate of change in economic conditions in the US versus the rest of the G7 and to the impending US elections, as the Bank of Japan generally struck a gradualist tone in seeking to normalize monetary policy without spooking markets. The Fund’s exposure in the asset class shifted frequently and unprofitably. Whipsawing fixed income futures trading: Fixed income markets flip-flopped as markets absorbed indications of lingering inflationary pressures even as volatile employment data, dwindling consumer confidence, and softening economic data left little doubt that higher for longer interest rates were closing in on their target and perhaps overshooting. | |
| Performance Past Does Not Indicate Future [Text] | Performance data represents past performance, which does not guarantee future results. The graph and table assume the maximum deferred sales charge and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or a redemption of Fund shares.</p>" id="sjs-B191"><p style="box-sizing: border-box; color: rgb(0, 82, 136); display: block; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">Performance data represents past performance, which does not guarantee future results. The graph and table assume the maximum deferred sales charge and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or a redemption of Fund shares.</p> | |
| Line Graph [Table Text Block] | Class C with load Credit Suisse Managed Futures Liquid Index Bloomberg Global Aggregate Bond Fund Index 10/31/2014 $10,000 $10,000 $10,000 10/31/2015 $11,160 $11,336 $9,693 10/31/2016 $11,398 $11,725 $10,234 10/31/2017 $11,111 $11,468 $10,355 10/31/2018 $10,260 $10,652 $10,143 10/31/2019 $10,315 $10,808 $11,110 10/31/2020 $9,682 $10,223 $11,736 10/31/2021 $11,440 $12,225 $11,590 10/31/2022 $13,709 $14,902 $9,181 10/31/2023 $12,503 $13,751 $9,339 10/31/2024 $11,283 $12,470 $10,230 | |
| Average Annual Return [Table Text Block] | Name 1 Year 5 Years 10 Years Class C (9.76%) 1.81% 1.21% Class C with load (10.66%) 1.81% 1.21% Credit Suisse Managed Futures Liquid Index (9.31%) 2.90% 2.23% Bloomberg Global Aggregate Bond Fund Index 9.55% (1.64%) 0.23% | |
| Material Change Date | | Oct. 31, 2023 |
| AssetsNet | $ 201,552,407 | |
| Holdings Count | Holding | 13 | |
| Advisory Fees Paid, Amount | $ 1,878,310 | |
| InvestmentCompanyPortfolioTurnover | 0% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $201,552,407 # of Portfolio Holdings 13 Portfolio Turnover Rate 0% Total Advisory Fees Paid $1,878,310 | |
| Holdings [Text Block] | Portfolio Breakdown (% of Total Investments) United States Treasury Obligations 82.8% Short-Term Investments 17.2 Derivatives are not reflected in amounts reported above. | |
| Material Fund Change [Text Block] | Material Fund Changes The below is a summary of certain changes that occurred since the Fund's prior fiscal year ended October 31, 2023. On May 1, 2024, Credit Suisse Asset Management, LLC (“Credit Suisse”) merged into UBS Asset Management (Americas) LLC (“UBS AM (Americas)”), with UBS AM (Americas) as the surviving entity, and UBS AM (Americas) became the investment manager to the Fund. Also on May 1, 2024, UBS Asset Management (US) Inc. replaced Credit Suisse Securities (USA) LLC as the Fund’s underwriter and distributor. On August 16, 2024, UBS (Americas) entered into an agreement with Manteio Scalable Technologies LLC (“Manteio”), Manteio Capital LLC and Manteio Partners LLC to transfer management of UBS (Americas)’s Quantitative Investment Strategies business, including the portfolio management team of the Fund, to Manteio (the “Transaction”). At a meeting held on August 15, 2024, the Board of the Trust approved an Agreement and Plan of Reorganization (the “Agreement and Plan”) pursuant to which the Fund would be reorganized into Manteio Managed Futures Strategy Fund, a newly created mutual fund advised by Manteio (the “Reorganization”). At a Special Meeting of Shareholders of the Fund on November 15, 2024, shareholders of the Fund approved the Agreement and Plan. The Reorganization closed on November 22, 2024 (the “Closing Date”). As a result of the Reorganization, the Manteio Managed Futures Strategy Fund acquired the assets, subject to the liabilities, of the Fund, and shareholders of the Fund became shareholders of the Manteio Managed Futures Strategy Fund as of the Closing Date. | |
| Material Fund Change Name [Text Block] | On August 16, 2024, UBS (Americas) entered into an agreement with Manteio Scalable Technologies LLC (“Manteio”), Manteio Capital LLC and Manteio Partners LLC to transfer management of UBS (Americas)’s Quantitative Investment Strategies business, including the portfolio management team of the Fund, to Manteio (the “Transaction”). At a meeting held on August 15, 2024, the Board of the Trust approved an Agreement and Plan of Reorganization (the “Agreement and Plan”) pursuant to which the Fund would be reorganized into Manteio Managed Futures Strategy Fund, a newly created mutual fund advised by Manteio (the “Reorganization”). At a Special Meeting of Shareholders of the Fund on November 15, 2024, shareholders of the Fund approved the Agreement and Plan. The Reorganization closed on November 22, 2024 (the “Closing Date”). As a result of the Reorganization, the Manteio Managed Futures Strategy Fund acquired the assets, subject to the liabilities, of the Fund, and shareholders of the Fund became shareholders of the Manteio Managed Futures Strategy Fund as of the Closing Date. | |
| Material Fund Change Adviser [Text Block] | On May 1, 2024, Credit Suisse Asset Management, LLC (“Credit Suisse”) merged into UBS Asset Management (Americas) LLC (“UBS AM (Americas)”), with UBS AM (Americas) as the surviving entity, and UBS AM (Americas) became the investment manager to the Fund. Also on May 1, 2024, UBS Asset Management (US) Inc. replaced Credit Suisse Securities (USA) LLC as the Fund’s underwriter and distributor. | |
| Summary of Change Legend [Text Block] | The below is a summary of certain changes that occurred since the Fund's prior fiscal year ended October 31, 2023. | |
| Updated Prospectus Phone Number | 877-870-2874 | |
| C000120618 | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Credit Suisse Managed Futures Strategy Fund | |
| Class Name | Class I | |
| Trading Symbol | CSAIX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Credit Suisse Managed Futures Strategy Fund (the "Fund") for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://us-fund.credit-suisse.com/CSAIX. You can also request this information by contacting us at 877-870-2874. | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 877-870-2874 | |
| Additional Information Website | https://us-fund.credit-suisse.com/CSAIX | |
| Expenses [Text Block] | What were the Fund costs for the last year? Annual Fund Operating Expenses (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $124 1.30% | |
| Expenses Paid, Amount | $ 124 | |
| Expense Ratio, Percent | 1.30% | |
| Factors Affecting Performance [Text Block] | How did the fund perform last year and what affected its performance? Portfolio performance summary What worked: Long-biased equity futures trading: Resilient corporate earnings, the intensification of pro-growth Chinese policy measures, and indications of easing inflationary pressure joined with money manager fear of missing out to send global equity markets higher to the benefit of the Fund. Commodity swap trading also contributed, albeit modestly: Short-biased Agriculture exposure generated gains as supportive weather conditions and diminishing demand for ethanol feedstocks weighed on prices. What didn’t work: Mercurial positioning in currencies futures: With developed market monetary policy desynchronizing, investors paid particular attention to the rate of change in economic conditions in the US versus the rest of the G7 and to the impending US elections, as the Bank of Japan generally struck a gradualist tone in seeking to normalize monetary policy without spooking markets. The Fund’s exposure in the asset class shifted frequently and unprofitably. Whipsawing fixed income futures trading: Fixed income markets flip-flopped as markets absorbed indications of lingering inflationary pressures even as volatile employment data, dwindling consumer confidence, and softening economic data left little doubt that higher for longer interest rates were closing in on their target and perhaps overshooting. | |
| Performance Past Does Not Indicate Future [Text] | Performance data represents past performance, which does not guarantee future results. The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or a redemption of Fund shares.</p>" id="sjs-B221"><p style="box-sizing: border-box; color: rgb(0, 82, 136); display: block; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">Performance data represents past performance, which does not guarantee future results. The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or a redemption of Fund shares.</p> | |
| Line Graph [Table Text Block] | Class I Credit Suisse Managed Futures Liquid Index Bloomberg Global Aggregate Bond Fund Index 10/31/2014 $10,000 $10,000 $10,000 10/31/2015 $11,288 $11,336 $9,693 10/31/2016 $11,641 $11,725 $10,234 10/31/2017 $11,455 $11,468 $10,355 10/31/2018 $10,690 $10,652 $10,143 10/31/2019 $10,854 $10,808 $11,110 10/31/2020 $10,287 $10,223 $11,736 10/31/2021 $12,276 $12,225 $11,590 10/31/2022 $14,865 $14,902 $9,181 10/31/2023 $13,687 $13,751 $9,339 10/31/2024 $12,473 $12,470 $10,230 | |
| Average Annual Return [Table Text Block] | Name 1 Year 5 Years 10 Years Class I (8.87%) 2.82% 2.23% Credit Suisse Managed Futures Liquid Index (9.31%) 2.90% 2.23% Bloomberg Global Aggregate Bond Fund Index 9.55% (1.64%) 0.23% | |
| Material Change Date | | Oct. 31, 2023 |
| AssetsNet | $ 201,552,407 | |
| Holdings Count | Holding | 13 | |
| Advisory Fees Paid, Amount | $ 1,878,310 | |
| InvestmentCompanyPortfolioTurnover | 0% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $201,552,407 # of Portfolio Holdings 13 Portfolio Turnover Rate 0% Total Advisory Fees Paid $1,878,310 | |
| Holdings [Text Block] | Portfolio Breakdown (% of Total Investments) United States Treasury Obligations 82.8% Short-Term Investments 17.2 Derivatives are not reflected in amounts reported above. | |
| Material Fund Change [Text Block] | Material Fund Changes The below is a summary of certain changes that occurred since the Fund's prior fiscal year ended October 31, 2023. On May 1, 2024, Credit Suisse Asset Management, LLC (“Credit Suisse”) merged into UBS Asset Management (Americas) LLC (“UBS AM (Americas)”), with UBS AM (Americas) as the surviving entity, and UBS AM (Americas) became the investment manager to the Fund. Also on May 1, 2024, UBS Asset Management (US) Inc. replaced Credit Suisse Securities (USA) LLC as the Fund’s underwriter and distributor. On August 16, 2024, UBS (Americas) entered into an agreement with Manteio Scalable Technologies LLC (“Manteio”), Manteio Capital LLC and Manteio Partners LLC to transfer management of UBS (Americas)’s Quantitative Investment Strategies business, including the portfolio management team of the Fund, to Manteio (the “Transaction”). At a meeting held on August 15, 2024, the Board of the Trust approved an Agreement and Plan of Reorganization (the “Agreement and Plan”) pursuant to which the Fund would be reorganized into Manteio Managed Futures Strategy Fund, a newly created mutual fund advised by Manteio (the “Reorganization”). At a Special Meeting of Shareholders of the Fund on November 15, 2024, shareholders of the Fund approved the Agreement and Plan. The Reorganization closed on November 22, 2024 (the “Closing Date”). As a result of the Reorganization, the Manteio Managed Futures Strategy Fund acquired the assets, subject to the liabilities, of the Fund, and shareholders of the Fund became shareholders of the Manteio Managed Futures Strategy Fund as of the Closing Date. | |
| Material Fund Change Name [Text Block] | On August 16, 2024, UBS (Americas) entered into an agreement with Manteio Scalable Technologies LLC (“Manteio”), Manteio Capital LLC and Manteio Partners LLC to transfer management of UBS (Americas)’s Quantitative Investment Strategies business, including the portfolio management team of the Fund, to Manteio (the “Transaction”). At a meeting held on August 15, 2024, the Board of the Trust approved an Agreement and Plan of Reorganization (the “Agreement and Plan”) pursuant to which the Fund would be reorganized into Manteio Managed Futures Strategy Fund, a newly created mutual fund advised by Manteio (the “Reorganization”). At a Special Meeting of Shareholders of the Fund on November 15, 2024, shareholders of the Fund approved the Agreement and Plan. The Reorganization closed on November 22, 2024 (the “Closing Date”). As a result of the Reorganization, the Manteio Managed Futures Strategy Fund acquired the assets, subject to the liabilities, of the Fund, and shareholders of the Fund became shareholders of the Manteio Managed Futures Strategy Fund as of the Closing Date. | |
| Material Fund Change Adviser [Text Block] | On May 1, 2024, Credit Suisse Asset Management, LLC (“Credit Suisse”) merged into UBS Asset Management (Americas) LLC (“UBS AM (Americas)”), with UBS AM (Americas) as the surviving entity, and UBS AM (Americas) became the investment manager to the Fund. Also on May 1, 2024, UBS Asset Management (US) Inc. replaced Credit Suisse Securities (USA) LLC as the Fund’s underwriter and distributor. | |
| Summary of Change Legend [Text Block] | The below is a summary of certain changes that occurred since the Fund's prior fiscal year ended October 31, 2023. | |
| Updated Prospectus Phone Number | 877-870-2874 | |
| C000118186 | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Credit Suisse Strategic Income Fund | |
| Class Name | Class A | |
| Trading Symbol | CSOAX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Credit Suisse Strategic Income Fund (the "Fund") for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://us-fund.credit-suisse.com/CSOAX. You can also request this information by contacting us at 877-870-2874. | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 877-870-2874 | |
| Additional Information Website | https://us-fund.credit-suisse.com/CSOAX | |
| Expenses [Text Block] | What were the Fund costs for the last year? Annual Fund Operating Expenses (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $111 1.04% | |
| Expenses Paid, Amount | $ 111 | |
| Expense Ratio, Percent | 1.04% | |
| Factors Affecting Performance [Text Block] | How did the fund perform last year and what affected its performance? Portfolio performance summary What worked: - Greatest contributors to the Fund's performance were asset allocation to High Yield Bonds, followed by Bank Loans and then Collateralized Loan Obligations. - Sectors that contributed the most to returns include Information Technology, Financials and Healthcare. - By ratings, B2, B3 and B1-rated investments contributed the most to returns. What didn’t work: - No sectors produced negative returns for the twelve-month period, but Utility and Consumer Non-Durables contributed the least to overall returns. - The only rating that produced negative returns was C-rated. | |
| Performance Past Does Not Indicate Future [Text] | Performance data represents past performance, which does not guarantee future results. The graph and table assume the maximum sales charge and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or a redemption of Fund shares.</p>" id="sjs-B251"><p style="box-sizing: border-box; color: rgb(0, 82, 136); display: block; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">Performance data represents past performance, which does not guarantee future results. The graph and table assume the maximum sales charge and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or a redemption of Fund shares.</p> | |
| Line Graph [Table Text Block] | Class A with load ICE BofA U.S. 3-Month Treasury Bill Index Bloomberg US Aggregate Bond Index 10/31/2014 $9,527 $10,000 $10,000 10/31/2015 $9,697 $10,002 $10,196 10/31/2016 $10,387 $10,032 $10,641 10/31/2017 $11,500 $10,105 $10,737 10/31/2018 $11,740 $10,274 $10,517 10/31/2019 $12,259 $10,521 $11,727 10/31/2020 $12,499 $10,617 $12,453 10/31/2021 $13,742 $10,623 $12,393 10/31/2022 $12,679 $10,706 $10,450 10/31/2023 $13,985 $11,217 $10,487 10/31/2024 $15,851 $11,821 $11,593 | |
| Average Annual Return [Table Text Block] | Name 1 Year 5 Years 10 Years Class A 13.34% 5.27% 5.22% Class A with load 7.99% 4.26% 4.71% ICE BofA U.S. 3-Month Treasury Bill Index 5.39% 2.36% 1.69% Bloomberg US Aggregate Bond Index 10.55% (0.23%) 1.49% | |
| Material Change Date | | Oct. 31, 2023 |
| AssetsNet | $ 848,520,788 | |
| Holdings Count | Holding | 517 | |
| Advisory Fees Paid, Amount | $ 3,427,671 | |
| InvestmentCompanyPortfolioTurnover | 44% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $848,520,788 # of Portfolio Holdings 517 Portfolio Turnover Rate 44% Total Advisory Fees Paid $3,427,671 | |
| Holdings [Text Block] | Portfolio Breakdown (% of Total Investments) Bank Loans 51.2% Corporate Bonds 36.8 Short-Term Investments 8.3 Asset Backed Securities 2.9 Common Stocks 0.8 Warrants 0.0 Derivatives are not reflected in amounts reported above. | |
| Largest Holdings [Text Block] | Credit Quality Breakdown Footnote Reference * (% of Total Investments) S&P Ratings Footnote Reference ** Value AAA 0.2% B 28.0 B- 8.8 B+ 8.0 BB 17.1 BB- 7.7 BB+ 6.2 BBB 0.0 BBB- 2.6 C 0.0 CC 0.2 CCC 1.9 CCC- 0.5 CCC+ 4.4 NR 5.2 Subtotal 90.8 Equity and Other 9.2 Total 100.0% Footnote Description Footnote * Expressed as a percentage of total investments (excluding securities lending collateral, if applicable) and may vary over time. Footnote ** Credit Quality is based on ratings provided by the S&P Global Ratings Division of S&P Global Inc. ("S&P"). S&P is a main provider of ratings for credit asset classes and is widely used amongst industry participants. The NR category consists of securities that have not been rated by S&P. Derivatives are not reflected in amounts reported above. | |
| Material Fund Change [Text Block] | Material Fund Changes The below is a summary of certain changes that occurred since the Fund's prior fiscal year ended October 31, 2023. On May 1, 2024, Credit Suisse Asset Management, LLC (“Credit Suisse”) merged into UBS Asset Management (Americas) LLC (“UBS AM (Americas)”), with UBS AM (Americas) as the surviving entity, and UBS AM (Americas) became the investment manager to the Fund. Also on May 1, 2024, UBS Asset Management (US) Inc. replaced Credit Suisse Securities (USA) LLC as the Fund’s underwriter and distributor. Credit Suisse Asset Management Limited, an affiliate of Credit Suisse, ceased serving as sub-investment advisor to the Fund on May 1, 2024. | |
| Material Fund Change Adviser [Text Block] | On May 1, 2024, Credit Suisse Asset Management, LLC (“Credit Suisse”) merged into UBS Asset Management (Americas) LLC (“UBS AM (Americas)”), with UBS AM (Americas) as the surviving entity, and UBS AM (Americas) became the investment manager to the Fund. Also on May 1, 2024, UBS Asset Management (US) Inc. replaced Credit Suisse Securities (USA) LLC as the Fund’s underwriter and distributor. Credit Suisse Asset Management Limited, an affiliate of Credit Suisse, ceased serving as sub-investment advisor to the Fund on May 1, 2024. | |
| Summary of Change Legend [Text Block] | The below is a summary of certain changes that occurred since the Fund's prior fiscal year ended October 31, 2023. | |
| Updated Prospectus Phone Number | 877-870-2874 | |
| C000120097 | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Credit Suisse Strategic Income Fund | |
| Class Name | Class C | |
| Trading Symbol | CSOCX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Credit Suisse Strategic Income Fund (the "Fund") for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://us-fund.credit-suisse.com/CSOCX. You can also request this information by contacting us at 877-870-2874. | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 877-870-2874 | |
| Additional Information Website | https://us-fund.credit-suisse.com/CSOCX | |
| Expenses [Text Block] | What were the Fund costs for the last year? Annual Fund Operating Expenses (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $190 1.79% | |
| Expenses Paid, Amount | $ 190 | |
| Expense Ratio, Percent | 1.79% | |
| Factors Affecting Performance [Text Block] | How did the fund perform last year and what affected its performance? Portfolio performance summary What worked: - Greatest contributors to the Fund's performance were asset allocation to High Yield Bonds, followed by Bank Loans and then Collateralized Loan Obligations. - Sectors that contributed the most to returns include Information Technology, Financials and Healthcare. - By ratings, B2, B3 and B1-rated investments contributed the most to returns. What didn’t work: - No sectors produced negative returns for the twelve-month period, but Utility and Consumer Non-Durables contributed the least to overall returns. - The only rating that produced negative returns was C-rated. | |
| Performance Past Does Not Indicate Future [Text] | Performance data represents past performance, which does not guarantee future results. The graph and table assume the maximum deferred sales charge and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or a redemption of Fund shares.</p>" id="sjs-B281"><p style="box-sizing: border-box; color: rgb(0, 82, 136); display: block; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">Performance data represents past performance, which does not guarantee future results. The graph and table assume the maximum deferred sales charge and do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or a redemption of Fund shares.</p> | |
| Line Graph [Table Text Block] | Class C with load ICE BofA U.S. 3-Month Treasury Bill Index Bloomberg US Aggregate Bond Index 10/31/2014 $10,000 $10,000 $10,000 10/31/2015 $10,114 $10,002 $10,196 10/31/2016 $10,754 $10,032 $10,641 10/31/2017 $11,817 $10,105 $10,737 10/31/2018 $11,986 $10,274 $10,517 10/31/2019 $12,410 $10,521 $11,727 10/31/2020 $12,558 $10,617 $12,453 10/31/2021 $13,705 $10,623 $12,393 10/31/2022 $12,564 $10,706 $10,450 10/31/2023 $13,740 $11,217 $10,487 10/31/2024 $15,457 $11,821 $11,593 | |
| Average Annual Return [Table Text Block] | Name 1 Year 5 Years 10 Years Class C 12.50% 4.49% 4.45% Class C with load 11.50% 4.49% 4.45% ICE BofA U.S. 3-Month Treasury Bill Index 5.39% 2.36% 1.69% Bloomberg US Aggregate Bond Index 10.55% (0.23%) 1.49% | |
| Material Change Date | | Oct. 31, 2023 |
| AssetsNet | $ 848,520,788 | |
| Holdings Count | Holding | 517 | |
| Advisory Fees Paid, Amount | $ 3,427,671 | |
| InvestmentCompanyPortfolioTurnover | 44% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $848,520,788 # of Portfolio Holdings 517 Portfolio Turnover Rate 44% Total Advisory Fees Paid $3,427,671 | |
| Holdings [Text Block] | Portfolio Breakdown (% of Total Investments) Bank Loans 51.2% Corporate Bonds 36.8 Short-Term Investments 8.3 Asset Backed Securities 2.9 Common Stocks 0.8 Warrants 0.0 Derivatives are not reflected in amounts reported above. | |
| Largest Holdings [Text Block] | Credit Quality Breakdown Footnote Reference * (% of Total Investments) S&P Ratings Footnote Reference ** Value AAA 0.2% B 28.0 B- 8.8 B+ 8.0 BB 17.1 BB- 7.7 BB+ 6.2 BBB 0.0 BBB- 2.6 C 0.0 CC 0.2 CCC 1.9 CCC- 0.5 CCC+ 4.4 NR 5.2 Subtotal 90.8 Equity and Other 9.2 Total 100.0% Footnote Description Footnote * Expressed as a percentage of total investments (excluding securities lending collateral, if applicable) and may vary over time. Footnote ** Credit Quality is based on ratings provided by the S&P Global Ratings Division of S&P Global Inc. ("S&P"). S&P is a main provider of ratings for credit asset classes and is widely used amongst industry participants. The NR category consists of securities that have not been rated by S&P. Derivatives are not reflected in amounts reported above. | |
| Material Fund Change [Text Block] | Material Fund Changes The below is a summary of certain changes that occurred since the Fund's prior fiscal year ended October 31, 2023. On May 1, 2024, Credit Suisse Asset Management, LLC (“Credit Suisse”) merged into UBS Asset Management (Americas) LLC (“UBS AM (Americas)”), with UBS AM (Americas) as the surviving entity, and UBS AM (Americas) became the investment manager to the Fund. Also on May 1, 2024, UBS Asset Management (US) Inc. replaced Credit Suisse Securities (USA) LLC as the Fund’s underwriter and distributor. Credit Suisse Asset Management Limited, an affiliate of Credit Suisse, ceased serving as sub-investment advisor to the Fund on May 1, 2024. | |
| Material Fund Change Adviser [Text Block] | On May 1, 2024, Credit Suisse Asset Management, LLC (“Credit Suisse”) merged into UBS Asset Management (Americas) LLC (“UBS AM (Americas)”), with UBS AM (Americas) as the surviving entity, and UBS AM (Americas) became the investment manager to the Fund. Also on May 1, 2024, UBS Asset Management (US) Inc. replaced Credit Suisse Securities (USA) LLC as the Fund’s underwriter and distributor. Credit Suisse Asset Management Limited, an affiliate of Credit Suisse, ceased serving as sub-investment advisor to the Fund on May 1, 2024. | |
| Summary of Change Legend [Text Block] | The below is a summary of certain changes that occurred since the Fund's prior fiscal year ended October 31, 2023. | |
| Updated Prospectus Phone Number | 877-870-2874 | |
| C000120098 | | |
| Shareholder Report [Line Items] | | |
| Fund Name | Credit Suisse Strategic Income Fund | |
| Class Name | Class I | |
| Trading Symbol | CSOIX | |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Credit Suisse Strategic Income Fund (the "Fund") for the period of November 1, 2023 to October 31, 2024. | |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report | |
| Additional Information [Text Block] | You can find additional information about the Fund at https://us-fund.credit-suisse.com/CSOIX. You can also request this information by contacting us at 877-870-2874. | |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. | |
| Additional Information Phone Number | 877-870-2874 | |
| Additional Information Website | https://us-fund.credit-suisse.com/CSOIX | |
| Expenses [Text Block] | What were the Fund costs for the last year? Annual Fund Operating Expenses (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $84 0.79% | |
| Expenses Paid, Amount | $ 84 | |
| Expense Ratio, Percent | 0.79% | |
| Factors Affecting Performance [Text Block] | How did the fund perform last year and what affected its performance? Portfolio performance summary What worked: - Greatest contributors to the Fund's performance were asset allocation to High Yield Bonds, followed by Bank Loans and then Collateralized Loan Obligations. - Sectors that contributed the most to returns include Information Technology, Financials and Healthcare. - By ratings, B2, B3 and B1-rated investments contributed the most to returns. What didn’t work: - No sectors produced negative returns for the twelve-month period, but Utility and Consumer Non-Durables contributed the least to overall returns. - The only rating that produced negative returns was C-rated. | |
| Performance Past Does Not Indicate Future [Text] | Performance data represents past performance, which does not guarantee future results. The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or a redemption of Fund shares.</p>" id="sjs-B311"><p style="box-sizing: border-box; color: rgb(0, 82, 136); display: block; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left;">Performance data represents past performance, which does not guarantee future results. The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or a redemption of Fund shares.</p> | |
| Line Graph [Table Text Block] | Class I ICE BofA U.S. 3-Month Treasury Bill Index Bloomberg US Aggregate Bond Index 10/31/2014 $10,000 $10,000 $10,000 10/31/2015 $10,205 $10,002 $10,196 10/31/2016 $10,960 $10,032 $10,641 10/31/2017 $12,177 $10,105 $10,737 10/31/2018 $12,463 $10,274 $10,517 10/31/2019 $13,046 $10,521 $11,727 10/31/2020 $13,334 $10,617 $12,453 10/31/2021 $14,682 $10,623 $12,393 10/31/2022 $13,594 $10,706 $10,450 10/31/2023 $15,031 $11,217 $10,487 10/31/2024 $17,077 $11,821 $11,593 | |
| Average Annual Return [Table Text Block] | Name 1 Year 5 Years 10 Years Class I 13.61% 5.53% 5.50% ICE BofA U.S. 3-Month Treasury Bill Index 5.39% 2.36% 1.69% Bloomberg US Aggregate Bond Index 10.55% (0.23%) 1.49% | |
| Material Change Date | | Oct. 31, 2023 |
| AssetsNet | $ 848,520,788 | |
| Holdings Count | Holding | 517 | |
| Advisory Fees Paid, Amount | $ 3,427,671 | |
| InvestmentCompanyPortfolioTurnover | 44% | |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Total Net Assets $848,520,788 # of Portfolio Holdings 517 Portfolio Turnover Rate 44% Total Advisory Fees Paid $3,427,671 | |
| Holdings [Text Block] | Portfolio Breakdown (% of Total Investments) Bank Loans 51.2% Corporate Bonds 36.8 Short-Term Investments 8.3 Asset Backed Securities 2.9 Common Stocks 0.8 Warrants 0.0 Derivatives are not reflected in amounts reported above. | |
| Largest Holdings [Text Block] | Credit Quality Breakdown Footnote Reference * (% of Total Investments) S&P Ratings Footnote Reference ** Value AAA 0.2% B 28.0 B- 8.8 B+ 8.0 BB 17.1 BB- 7.7 BB+ 6.2 BBB 0.0 BBB- 2.6 C 0.0 CC 0.2 CCC 1.9 CCC- 0.5 CCC+ 4.4 NR 5.2 Subtotal 90.8 Equity and Other 9.2 Total 100.0% Footnote Description Footnote * Expressed as a percentage of total investments (excluding securities lending collateral, if applicable) and may vary over time. Footnote ** Credit Quality is based on ratings provided by the S&P Global Ratings Division of S&P Global Inc. ("S&P"). S&P is a main provider of ratings for credit asset classes and is widely used amongst industry participants. The NR category consists of securities that have not been rated by S&P. Derivatives are not reflected in amounts reported above. | |
| Material Fund Change [Text Block] | Material Fund Changes The below is a summary of certain changes that occurred since the Fund's prior fiscal year ended October 31, 2023. On May 1, 2024, Credit Suisse Asset Management, LLC (“Credit Suisse”) merged into UBS Asset Management (Americas) LLC (“UBS AM (Americas)”), with UBS AM (Americas) as the surviving entity, and UBS AM (Americas) became the investment manager to the Fund. Also on May 1, 2024, UBS Asset Management (US) Inc. replaced Credit Suisse Securities (USA) LLC as the Fund’s underwriter and distributor. Credit Suisse Asset Management Limited, an affiliate of Credit Suisse, ceased serving as sub-investment advisor to the Fund on May 1, 2024. | |
| Material Fund Change Adviser [Text Block] | On May 1, 2024, Credit Suisse Asset Management, LLC (“Credit Suisse”) merged into UBS Asset Management (Americas) LLC (“UBS AM (Americas)”), with UBS AM (Americas) as the surviving entity, and UBS AM (Americas) became the investment manager to the Fund. Also on May 1, 2024, UBS Asset Management (US) Inc. replaced Credit Suisse Securities (USA) LLC as the Fund’s underwriter and distributor. Credit Suisse Asset Management Limited, an affiliate of Credit Suisse, ceased serving as sub-investment advisor to the Fund on May 1, 2024. | |
| Summary of Change Legend [Text Block] | The below is a summary of certain changes that occurred since the Fund's prior fiscal year ended October 31, 2023. | |
| Updated Prospectus Phone Number | 877-870-2874 | |
