Shareholder Report | 12 Months Ended |
Sep. 30, 2024 USD ($) Holding |
Shareholder Report [Line Items] | |
Document Type | N-CSR |
Amendment Flag | false |
Registrant Name | SEI INSTITUTIONAL MANAGED TRUST |
Entity Central Index Key | 0000804239 |
Entity Investment Company Type | N-1A |
Document Period End Date | Sep. 30, 2024 |
C000078064 | |
Shareholder Report [Line Items] | |
Fund Name | Large Cap Fund |
Class Name | Class F |
Trading Symbol | SLGAX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the Large 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Large Cap Fund, Class F Shares $103 0.89% |
Expenses Paid, Amount | $ 103 |
Expense Ratio, Percent | 0.89% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares underperformed its benchmark, the Russell 1000 Index, for the 12-month period ending September 30, 2024. The Fund recorded a positive absolute return for the reporting period, but underperformed the benchmark due to its tilt toward value stocks and away from the mega-cap growth stocks that led the market upturn. The Fund’s underweight exposure to the information technology sector also weighed on performance. Among the Fund’s sub-advisors, Brandywine Global Investment Management, LLC lagged the benchmark due to its value orientation and stock selection within the energy and consumer discretionary sectors. LSV Asset Management lagged the benchmark due to its value orientation, an overweight allocation to the energy sector, an underweight to the information technology sector, and security selection within the industrials sector. Fred Alger Management, LLC outperformed the benchmark due to its growth orientation, a large weight in the information technology sector, and stock selection within the information technology sector. Mar Vista Investment Partners, LLC’s underperformance was attributable to its lower-beta (a measure of an investment’s volatility relative to a benchmark) tilt, underweights to the mega-cap growth stocks that led the market upturn over the period, and stock selection within the information technology sector. SEI’s Quantitative Investment Management (QIM) team’s factor-based momentum strategy outperformed due to security selection within the industrials and information technology sectors. The QIM Team’s factor-based quality strategy lagged the benchmark due to security selection within the information technology sector. Copeland Capital Management LLC’s (Copeland) performance lagged during the portion of the reporting period that it was a Fund sub-advisor because of its lower-beta tilt and stock selection within the consumer discretionary and financials sectors. Regarding the use of derivatives during the reporting period, the Fund employed equity index futures in an effort to provide stock-like performance to the liquidity reserve account, which contained cash available for fund withdrawals. This contributed positively to the Fund’s absolute return for the period. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Large Cap Fund, Class F Shares - $273003 S&P 500 ® Russell 1000 Index (USD) - $342568 Sep/14 $100000 $100000 $100000 Sep/15 $98272 $99385 $99386 Sep/16 $108246 $114721 $114226 Sep/17 $127598 $136070 $135402 Sep/18 $149038 $160441 $159456 Sep/19 $150787 $167266 $165632 Sep/20 $162349 $192605 $192155 Sep/21 $210948 $250396 $251653 Sep/22 $174560 $211654 $208330 Sep/23 $206310 $257408 $252483 Sep/24 $273003 $350980 $342568 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Large Cap Fund, Class F Shares 32.33% 12.61% 10.56% S&P 500 ® 36.35% 15.98% 13.38% Russell 1000 Index (USD) 35.68% 15.64% 13.10% |
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 | $ 1,652,125,000 |
Holdings Count | Holding | 307 |
Advisory Fees Paid, Amount | $ 5,980 |
InvestmentCompanyPortfolioTurnover | 34% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $1,652,125 307 $5,980 34% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Affiliated Partnership 0.0% Derivative Contracts (Net) 0.0% Cash Equivalent 1.0% Real Estate 1.6% Utilities 2.9% Materials 3.2% Energy 3.4% Consumer Staples 6.1% Communication Services 8.6% Consumer Discretionary 9.3% Industrials 11.0% Health Care 13.1% Financials 13.4% Information Technology 26.2% 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 Footnote Reference Microsoft Corp 4.6% Apple Inc 3.9% NVIDIA Corp 2.6% Meta Platforms Inc, Cl A 2.4% Amazon.com Inc, Cl A 2.0% Visa Inc, Cl A 1.6% Broadcom Inc 1.6% Johnson & Johnson 1.5% Eli Lilly & Co 1.2% TransDigm Group Inc 1.2% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes During the reporting period, Ceredex Value Advisors LLC and Coho Partners, Ltd. were terminated as Fund sub-advisers, while Copeland was hired as a manager. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
C000147400 | |
Shareholder Report [Line Items] | |
Fund Name | Large Cap Fund |
Class Name | Class Y |
Trading Symbol | SLYCX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the Large 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Large Cap Fund, Class Y Shares $76 0.65% |
Expenses Paid, Amount | $ 76 |
Expense Ratio, Percent | 0.65% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares underperformed its benchmark, the Russell 1000 Index, for the 12-month period ending September 30, 2024. The Fund recorded a positive absolute return for the reporting period, but underperformed the benchmark due to its tilt toward value stocks and away from the mega-cap growth stocks that led the market upturn. The Fund’s underweight exposure to the information technology sector also weighed on performance. Among the Fund’s sub-advisors, Brandywine Global Investment Management, LLC lagged the benchmark due to its value orientation and stock selection within the energy and consumer discretionary sectors. LSV Asset Management lagged the benchmark due to its value orientation, an overweight allocation to the energy sector, an underweight to the information technology sector, and security selection within the industrials sector. Fred Alger Management, LLC outperformed the benchmark due to its growth orientation, a large weight in the information technology sector, and stock selection within the information technology sector. Mar Vista Investment Partners, LLC’s underperformance was attributable to its lower-beta (a measure of an investment’s volatility relative to a benchmark) tilt, underweights to the mega-cap growth stocks that led the market upturn over the period, and stock selection within the information technology sector. SEI’s Quantitative Investment Management (QIM) team’s factor-based momentum strategy outperformed due to security selection within the industrials and information technology sectors. The QIM Team’s factor-based quality strategy lagged the benchmark due to security selection within the information technology sector. Copeland Capital Management LLC’s (Copeland) performance lagged during the portion of the reporting period that it was a Fund sub-advisor because of its lower-beta tilt and stock selection within the consumer discretionary and financials sectors. Regarding the use of derivatives during the reporting period, the Fund employed equity index futures in an effort to provide stock-like performance to the liquidity reserve account, which contained cash available for fund withdrawals. This contributed positively to the Fund’s absolute return for the period. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Large Cap Fund, Class Y Shares - $267921 S&P 500 ® Russell 1000 Index (USD) - $326625 Dec/14 $100000 $100000 $100000 Sep/15 $94260 $94714 $94761 Sep/16 $104156 $109328 $108910 Sep/17 $123066 $129674 $129101 Sep/18 $144087 $152899 $152035 Sep/19 $146160 $159403 $157923 Sep/20 $157652 $183551 $183212 Sep/21 $205464 $238625 $239941 Sep/22 $170365 $201705 $198634 Sep/23 $202031 $245308 $240732 Sep/24 $267921 $334481 $326625 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Large Cap Fund, Class Y Shares 32.61% 12.88% 10.83% S&P 500 ® ) Footnote Reference 36.35% 15.98% 13.38% Russell 1000 Index (USD) 35.68% 15.64% 13.10% |
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 | $ 1,652,125,000 |
Holdings Count | Holding | 307 |
Advisory Fees Paid, Amount | $ 5,980 |
InvestmentCompanyPortfolioTurnover | 34% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $1,652,125 307 $5,980 34% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Affiliated Partnership 0.0% Derivative Contracts (Net) 0.0% Cash Equivalent 1.0% Real Estate 1.6% Utilities 2.9% Materials 3.2% Energy 3.4% Consumer Staples 6.1% Communication Services 8.6% Consumer Discretionary 9.3% Industrials 11.0% Health Care 13.1% Financials 13.4% Information Technology 26.2% 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 Footnote Reference Microsoft Corp 4.6% Apple Inc 3.9% NVIDIA Corp 2.6% Meta Platforms Inc, Cl A 2.4% Amazon.com Inc, Cl A 2.0% Visa Inc, Cl A 1.6% Broadcom Inc 1.6% Johnson & Johnson 1.5% Eli Lilly & Co 1.2% TransDigm Group Inc 1.2% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes During the reporting period, Ceredex Value Advisors LLC and Coho Partners, Ltd. were terminated as Fund sub-advisers, while Copeland was hired as a manager. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
C000018198 | |
Shareholder Report [Line Items] | |
Fund Name | Large Cap Value Fund |
Class Name | Class F |
Trading Symbol | TRMVX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the Large Cap Value 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Large Cap Value Fund, Class F Shares $100 0.89% |
Expenses Paid, Amount | $ 100 |
Expense Ratio, Percent | 0.89% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares underperformed its benchmark, the Russell 1000 Value Index, for the 12-month period ending September 30, 2024. The Fund’s more significant value tilt compared to that of the benchmark detracted from performance during the reporting period as relatively cheaper stocks underperformed more expensive shares. Stock selection within the health care and industrials sectors also weighed on Fund performance. However, stock selection within the utilities sector benefited performance. Among the Fund’s sub-advisors, Cullen Capital Management, LLC lagged the benchmark over the reporting period due to an underweight to the financials sector, as well as stock selection within the energy and health care sectors. LSV Asset Management’s underperformance was attributable to its strong value tilt, an overweight allocation to the energy sector, and stock selection within the industrials sector. Brandywine Global Investment Management, LLC (Brandywine) lagged the benchmark due its strong value tilt, as well as stock selection and an overweight position in the health care sector. Stock selection within the financials sector also detracted from Brandywine’s performance, while holdings in the utilities sector had a positive impact. SEI’s Quantitative Investment Management (QIM) Team’s factor-based value strategy underperformed during the period due to its strong value tilt, stock selection within the consumer staples sector, and an overweight to the energy sector. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Large Cap Value Fund, Class F Shares - $214916 S&P 500 ® Russell 1000 Value Index (USD) - $241835 Sep/14 $100000 $100000 $100000 Sep/15 $93854 $99385 $95576 Sep/16 $103385 $114721 $111055 Sep/17 $122124 $136070 $127849 Sep/18 $136214 $160441 $139931 Sep/19 $134975 $167266 $145529 Sep/20 $121536 $192605 $138216 Sep/21 $167970 $250396 $186608 Sep/22 $150669 $211654 $165405 Sep/23 $171805 $257408 $189286 Sep/24 $214916 $350980 $241835 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Large Cap Value Fund, Class F Shares 25.09% 9.75% 7.95% S&P 500 ® 36.35% 15.98% 13.38% Russell 1000 Value Index (USD) 27.76% 10.69% 9.23% |
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 | $ 1,365,522,000 |
Holdings Count | Holding | 217 |
Advisory Fees Paid, Amount | $ 4,250 |
InvestmentCompanyPortfolioTurnover | 15% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $1,365,522 217 $4,250 15% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Affiliated Partnership 0.0% Derivative Contracts (Net) 0.0% Cash Equivalent 1.0% Real Estate 3.2% Materials 3.9% Utilities 5.0% Consumer Discretionary 5.6% Energy 7.0% Communication Services 7.5% Information Technology 9.0% Consumer Staples 9.8% Industrials 12.3% Health Care 15.5% Financials 20.2% 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 Footnote Reference AT&T Inc 2.5% Citigroup Inc 2.4% JPMorgan Chase & Co 2.0% Exxon Mobil Corp 2.0% Johnson & Johnson 1.9% Merck & Co Inc 1.7% Bank of America Corp 1.6% Comcast Corp, Cl A 1.6% Kroger Co/The 1.5% RTX Corp 1.4% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000018197 | |
Shareholder Report [Line Items] | |
Fund Name | Large Cap Value Fund |
Class Name | Class I |
Trading Symbol | SEUIX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class I Shares of the Large Cap Value 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Large Cap Value Fund, Class I Shares $125 1.11% |
Expenses Paid, Amount | $ 125 |
Expense Ratio, Percent | 1.11% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class I Shares underperformed its benchmark, the Russell 1000 Value Index, for the 12-month period ending September 30, 2024. The Fund’s more significant value tilt compared to that of the benchmark detracted from performance during the reporting period as relatively cheaper stocks underperformed more expensive shares. Stock selection within the health care and industrials sectors also weighed on Fund performance. However, stock selection within the utilities sector benefited performance. Among the Fund’s sub-advisors, Cullen Capital Management, LLC lagged the benchmark over the reporting period due to an underweight to the financials sector, as well as stock selection within the energy and health care sectors. LSV Asset Management’s underperformance was attributable to its strong value tilt, an overweight allocation to the energy sector, and stock selection within the industrials sector. Brandywine Global Investment Management, LLC (Brandywine) lagged the benchmark due its strong value tilt, as well as stock selection and an overweight position in the health care sector. Stock selection within the financials sector also detracted from Brandywine’s performance, while holdings in the utilities sector had a positive impact. SEI’s Quantitative Investment Management (QIM) Team’s factor-based value strategy underperformed during the period due to its strong value tilt, stock selection within the consumer staples sector, and an overweight to the energy sector. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Large Cap Value Fund, Class I Shares - $210220 S&P 500 ® Russell 1000 Value Index (USD) - $241835 Sep/14 $100000 $100000 $100000 Sep/15 $93664 $99385 $95576 Sep/16 $102966 $114721 $111055 Sep/17 $121336 $136070 $127849 Sep/18 $135050 $160441 $139931 Sep/19 $133517 $167266 $145529 Sep/20 $119933 $192605 $138216 Sep/21 $165422 $250396 $186608 Sep/22 $148023 $211654 $165405 Sep/23 $168429 $257408 $189286 Sep/24 $210220 $350980 $241835 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Large Cap Value Fund, Class I Shares 24.81% 9.50% 7.71% S&P 500 ® 36.35% 15.98% 13.38% Russell 1000 Value Index (USD) 27.76% 10.69% 9.23% |
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 | $ 1,365,522,000 |
Holdings Count | Holding | 217 |
Advisory Fees Paid, Amount | $ 4,250 |
InvestmentCompanyPortfolioTurnover | 15% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $1,365,522 217 $4,250 15% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Affiliated Partnership 0.0% Derivative Contracts (Net) 0.0% Cash Equivalent 1.0% Real Estate 3.2% Materials 3.9% Utilities 5.0% Consumer Discretionary 5.6% Energy 7.0% Communication Services 7.5% Information Technology 9.0% Consumer Staples 9.8% Industrials 12.3% Health Care 15.5% Financials 20.2% 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 Footnote Reference AT&T Inc 2.5% Citigroup Inc 2.4% JPMorgan Chase & Co 2.0% Exxon Mobil Corp 2.0% Johnson & Johnson 1.9% Merck & Co Inc 1.7% Bank of America Corp 1.6% Comcast Corp, Cl A 1.6% Kroger Co/The 1.5% RTX Corp 1.4% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000147390 | |
Shareholder Report [Line Items] | |
Fund Name | Large Cap Value Fund |
Class Name | Class Y |
Trading Symbol | SVAYX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the Large Cap Value 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Large Cap Value Fund, Class Y Shares $72 0.64% |
Expenses Paid, Amount | $ 72 |
Expense Ratio, Percent | 0.64% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares underperformed its benchmark, the Russell 1000 Value Index, for the 12-month period ending September 30, 2024. The Fund’s more significant value tilt compared to that of the benchmark detracted from performance during the reporting period as relatively cheaper stocks underperformed more expensive shares. Stock selection within the health care and industrials sectors also weighed on Fund performance. However, stock selection within the utilities sector benefited performance. Among the Fund’s sub-advisors, Cullen Capital Management, LLC lagged the benchmark over the reporting period due to an underweight to the financials sector, as well as stock selection within the energy and health care sectors. LSV Asset Management’s underperformance was attributable to its strong value tilt, an overweight allocation to the energy sector, and stock selection within the industrials sector. Brandywine Global Investment Management, LLC (Brandywine) lagged the benchmark due its strong value tilt, as well as stock selection and an overweight position in the health care sector. Stock selection within the financials sector also detracted from Brandywine’s performance, while holdings in the utilities sector had a positive impact. SEI’s Quantitative Investment Management (QIM) Team’s factor-based value strategy underperformed during the period due to its strong value tilt, stock selection within the consumer staples sector, and an overweight to the energy sector. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Large Cap Value Fund, Class Y Shares - $219640 S&P 500 ® Russell 1000 Value Index (USD) - $241835 Sep/14 $100000 $100000 $100000 Sep/15 $93854 $99385 $95576 Sep/16 $103624 $114721 $111055 Sep/17 $122656 $136070 $127849 Sep/18 $137149 $160441 $139931 Sep/19 $136303 $167266 $145529 Sep/20 $122998 $192605 $138216 Sep/21 $170408 $250396 $186608 Sep/22 $153257 $211654 $165405 Sep/23 $175204 $257408 $189286 Sep/24 $219640 $350980 $241835 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Large Cap Value Fund, Class Y Shares 25.36% 10.01% 8.19% S&P 500 ® ) Footnote Reference 36.35% 15.98% 13.38% Russell 1000 Value Index (USD) 27.76% 10.69% 9.23% |
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 | $ 1,365,522,000 |
Holdings Count | Holding | 217 |
Advisory Fees Paid, Amount | $ 4,250 |
InvestmentCompanyPortfolioTurnover | 15% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $1,365,522 217 $4,250 15% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Affiliated Partnership 0.0% Derivative Contracts (Net) 0.0% Cash Equivalent 1.0% Real Estate 3.2% Materials 3.9% Utilities 5.0% Consumer Discretionary 5.6% Energy 7.0% Communication Services 7.5% Information Technology 9.0% Consumer Staples 9.8% Industrials 12.3% Health Care 15.5% Financials 20.2% 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 Footnote Reference AT&T Inc 2.5% Citigroup Inc 2.4% JPMorgan Chase & Co 2.0% Exxon Mobil Corp 2.0% Johnson & Johnson 1.9% Merck & Co Inc 1.7% Bank of America Corp 1.6% Comcast Corp, Cl A 1.6% Kroger Co/The 1.5% RTX Corp 1.4% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000018193 | |
Shareholder Report [Line Items] | |
Fund Name | Large Cap Growth Fund |
Class Name | Class F |
Trading Symbol | SELCX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the Large Cap Growth 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Large Cap Growth Fund, Class F Shares $108 0.89% |
Expenses Paid, Amount | $ 108 |
Expense Ratio, Percent | 0.89% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares modestly outperformed its benchmark, the Russell 1000 Growth Index, for the 12-month period ending September 30, 2024. Fund performance for the reporting period was enhanced by favorable security selection within the industrials, consumer discretionary, and health care sectors. This was partially offset by the negative impact of an underweight position and stock selection in the semiconductor industry. Among the Fund’s sub-advisors, Fred Alger Management, LLC outperformed the benchmark due to stock selection within the information technology, industrials, and health care sectors. PineStone Asset Management Inc.’s performance lagged due to an underweight to the information technology sector and holdings in the communication services, financials and health care sectors. Mackenzie Investments Corporation outperformed the benchmark due to an overweight to the utilities sector and favorable stock selection in the consumer discretionary sector. The outperformance of SEI’s Quantitative Investment Management (QIM) Team’s factor-based momentum strategy was attributable to stock selection in the industrials and information technology sectors. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Large Cap Growth Fund, Class F Shares - $388831 S&P 500 ® Russell 1000 Growth Index (USD) (TR) - $461454 Sep/14 $100000 $100000 $100000 Sep/15 $102873 $99385 $103173 Sep/16 $112928 $114721 $117371 Sep/17 $132003 $136070 $143123 Sep/18 $164660 $160441 $180759 Sep/19 $168660 $167266 $187459 Sep/20 $226126 $192605 $257816 Sep/21 $284455 $250396 $328245 Sep/22 $216443 $211654 $254095 Sep/23 $272465 $257408 $324533 Sep/24 $388831 $350980 $461454 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Large Cap Growth Fund, Class F Shares 42.71% 18.18% 14.54% S&P 500 ® 36.35% 15.98% 13.38% Russell 1000 Growth Index (USD) (TR) 42.19% 19.74% 16.52% |
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 | $ 1,541,858,000 |
Holdings Count | Holding | 189 |
Advisory Fees Paid, Amount | $ 4,733 |
InvestmentCompanyPortfolioTurnover | 65% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $1,541,858 189 $4,733 65% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Affiliated Partnership 0.0% Derivative Contracts (Net) 0.2% Energy 0.2% Real Estate 0.7% Utilities 1.2% Cash Equivalent 2.0% Materials 2.0% U.S. Treasury Obligation 3.0% Consumer Staples 3.6% Financials 7.0% Industrials 7.8% Health Care 9.9% Communication Services 11.0% Consumer Discretionary 11.9% Information Technology 39.6% 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 Footnote Reference Microsoft Corp 10.1% Apple Inc 7.7% NVIDIA Corp 4.8% Meta Platforms Inc, Cl A 4.3% Amazon.com Inc, Cl A 4.2% Alphabet Inc, Cl A 3.3% U.S. Treasury Bill, 5.02%, 11/29/2024 3.0% Broadcom Inc 2.6% Eli Lilly & Co 1.9% UnitedHealth Group Inc 1.8% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000018192 | |
Shareholder Report [Line Items] | |
Fund Name | Large Cap Growth Fund |
Class Name | Class I |
Trading Symbol | SPGIX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class I Shares of the Large Cap Growth 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Large Cap Growth Fund, Class I Shares $135 1.11% |
Expenses Paid, Amount | $ 135 |
Expense Ratio, Percent | 1.11% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class I Shares modestly outperformed its benchmark, the Russell 1000 Growth Index, for the 12-month period ending September 30, 2024. Fund performance for the reporting period was enhanced by favorable security selection within the industrials, consumer discretionary, and health care sectors. This was partially offset by the negative impact of an underweight position and stock selection in the semiconductor industry. Among the Fund’s sub-advisors, Fred Alger Management, LLC outperformed the benchmark due to stock selection within the information technology, industrials, and health care sectors. PineStone Asset Management Inc.’s performance lagged due to an underweight to the information technology sector and holdings in the communication services, financials and health care sectors. Mackenzie Investments Corporation outperformed the benchmark due to an overweight to the utilities sector and favorable stock selection in the consumer discretionary sector. The outperformance of SEI’s Quantitative Investment Management (QIM) Team’s factor-based momentum strategy was attributable to stock selection in the industrials and information technology sectors. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Large Cap Growth Fund, Class I Shares - $380305 S&P 500 ® Russell 1000 Growth Index (USD) (TR) - $461454 Sep/14 $100000 $100000 $100000 Sep/15 $102653 $99385 $103173 Sep/16 $112450 $114721 $117371 Sep/17 $131147 $136070 $143123 Sep/18 $163179 $160441 $180759 Sep/19 $166806 $167266 $187459 Sep/20 $223096 $192605 $257816 Sep/21 $280057 $250396 $328245 Sep/22 $212624 $211654 $254095 Sep/23 $267083 $257408 $324533 Sep/24 $380305 $350980 $461454 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Large Cap Growth Fund, Class I Shares 42.39% 17.92% 14.29% S&P 500 ® 36.35% 15.98% 13.38% Russell 1000 Growth Index (USD) (TR) 42.19% 19.74% 16.52% |
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 | $ 1,541,858,000 |
Holdings Count | Holding | 189 |
Advisory Fees Paid, Amount | $ 4,733 |
InvestmentCompanyPortfolioTurnover | 65% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $1,541,858 189 $4,733 65% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Affiliated Partnership 0.0% Derivative Contracts (Net) 0.2% Energy 0.2% Real Estate 0.7% Utilities 1.2% Cash Equivalent 2.0% Materials 2.0% U.S. Treasury Obligation 3.0% Consumer Staples 3.6% Financials 7.0% Industrials 7.8% Health Care 9.9% Communication Services 11.0% Consumer Discretionary 11.9% Information Technology 39.6% 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 Footnote Reference Microsoft Corp 10.1% Apple Inc 7.7% NVIDIA Corp 4.8% Meta Platforms Inc, Cl A 4.3% Amazon.com Inc, Cl A 4.2% Alphabet Inc, Cl A 3.3% U.S. Treasury Bill, 5.02%, 11/29/2024 3.0% Broadcom Inc 2.6% Eli Lilly & Co 1.9% UnitedHealth Group Inc 1.8% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000147387 | |
Shareholder Report [Line Items] | |
Fund Name | Large Cap Growth Fund |
Class Name | Class Y |
Trading Symbol | SLRYX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the Large Cap Growth 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Large Cap Growth Fund, Class Y Shares $78 0.64% |
Expenses Paid, Amount | $ 78 |
Expense Ratio, Percent | 0.64% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares modestly outperformed its benchmark, the Russell 1000 Growth Index, for the 12-month period ending September 30, 2024. Fund performance for the reporting period was enhanced by favorable security selection within the industrials, consumer discretionary, and health care sectors. This was partially offset by the negative impact of an underweight position and stock selection in the semiconductor industry. Among the Fund’s sub-advisors, Fred Alger Management, LLC outperformed the benchmark due to stock selection within the information technology, industrials, and health care sectors. PineStone Asset Management Inc.’s performance lagged due to an underweight to the information technology sector and holdings in the communication services, financials and health care sectors. Mackenzie Investments Corporation outperformed the benchmark due to an overweight to the utilities sector and favorable stock selection in the consumer discretionary sector. The outperformance of SEI’s Quantitative Investment Management (QIM) Team’s factor-based momentum strategy was attributable to stock selection in the industrials and information technology sectors. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Large Cap Growth Fund, Class Y Shares - $397577 S&P 500 ® Russell 1000 Growth Index (USD) (TR) - $461454 Sep/14 $100000 $100000 $100000 Sep/15 $102873 $99385 $103173 Sep/16 $113222 $114721 $117371 Sep/17 $132662 $136070 $143123 Sep/18 $165880 $160441 $180759 Sep/19 $170355 $167266 $187459 Sep/20 $228943 $192605 $257816 Sep/21 $288690 $250396 $328245 Sep/22 $220191 $211654 $254095 Sep/23 $277917 $257408 $324533 Sep/24 $397577 $350980 $461454 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Large Cap Growth Fund, Class Y Shares 43.06% 18.47% 14.80% S&P 500 ® ) Footnote Reference 36.35% 15.98% 13.38% Russell 1000 Growth Index (USD) (TR) 42.19% 19.74% 16.52% |
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 | $ 1,541,858,000 |
Holdings Count | Holding | 189 |
Advisory Fees Paid, Amount | $ 4,733 |
InvestmentCompanyPortfolioTurnover | 65% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $1,541,858 189 $4,733 65% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Affiliated Partnership 0.0% Derivative Contracts (Net) 0.2% Energy 0.2% Real Estate 0.7% Utilities 1.2% Cash Equivalent 2.0% Materials 2.0% U.S. Treasury Obligation 3.0% Consumer Staples 3.6% Financials 7.0% Industrials 7.8% Health Care 9.9% Communication Services 11.0% Consumer Discretionary 11.9% Information Technology 39.6% 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 Footnote Reference Microsoft Corp 10.1% Apple Inc 7.7% NVIDIA Corp 4.8% Meta Platforms Inc, Cl A 4.3% Amazon.com Inc, Cl A 4.2% Alphabet Inc, Cl A 3.3% U.S. Treasury Bill, 5.02%, 11/29/2024 3.0% Broadcom Inc 2.6% Eli Lilly & Co 1.9% UnitedHealth Group Inc 1.8% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000198269 | |
Shareholder Report [Line Items] | |
Fund Name | Large Cap Index Fund |
Class Name | Class F |
Trading Symbol | SLGFX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the Large Cap Index 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Large Cap Index Fund, Class F Shares $29 0.25% |
Expenses Paid, Amount | $ 29 |
Expense Ratio, Percent | 0.25% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares achieved its objective of tracking, before fees and expenses, the performance of its benchmark, the Russell 1000 Index, for the 12-month period ending September 30, 2024. The Fund uses a sub-advisor to manage the Fund’s portfolio under the general supervision of SEI Investments Management Corporation. The sole sub-advisor as of September 30, 2024, was SSGA Funds Management, Inc. The U.S. stock market rallied sharply during the reporting period, led by mega-cap growth stocks. The gains were concentrated in the higher-beta (a measure of an investment’s volatility relative to a benchmark) stocks, and low-beta stocks generally lagged in the bull market. The strongest-performing sector was information technology. The energy sector was the primary market laggard for the period. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Large Cap Index Fund, Class F Shares - $221065 S&P 500 ® Russell 1000 Index (USD) - $225011 Jan/18 $100000 $100000 $100000 Sep/18 $104469 $104576 $104737 Sep/19 $108239 $109025 $108793 Sep/20 $125201 $125541 $126214 Sep/21 $163559 $163210 $165294 Sep/22 $135139 $137958 $136839 Sep/23 $163388 $167780 $165840 Sep/24 $221065 $228771 $225011 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years Annualized Since Inception Large Cap Index Fund, Class F Shares 35.30% 15.35% 12.63% S&P 500 ® 36.35% 15.98% 13.21% Russell 1000 Index (USD) 35.68% 15.64% 12.93% |
Performance Inception Date | Jan. 31, 2018 |
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 | $ 1,183,715,000 |
Holdings Count | Holding | 1,018 |
Advisory Fees Paid, Amount | $ 221 |
InvestmentCompanyPortfolioTurnover | 4% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $1,183,715 1,018 $221 4% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Affiliated Partnership 0.0% Right 0.0% Cash Collateral 0.0% Derivative Contracts (Net) 0.0% Cash Equivalent 1.8% Utilities 2.4% Materials 2.5% Real Estate 2.6% Energy 3.3% Consumer Staples 5.6% Communication Services 8.5% Industrials 9.3% Consumer Discretionary 10.2% Health Care 11.3% Financials 13.2% Information Technology 29.2% 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 Footnote Reference Apple Inc 6.3% Microsoft Corp 5.9% NVIDIA Corp 5.3% Amazon.com Inc, Cl A 3.2% Meta Platforms Inc, Cl A 2.3% Alphabet Inc, Cl A 1.8% Berkshire Hathaway Inc, Cl B 1.6% Alphabet Inc, Cl C 1.5% Broadcom Inc 1.5% Tesla Inc 1.4% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000018201 | |
Shareholder Report [Line Items] | |
Fund Name | Tax-Managed Large Cap Fund |
Class Name | Class F |
Trading Symbol | TMLCX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the Tax-Managed Large 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Tax-Managed Large Cap Fund, Class F Shares $102 0.89% |
Expenses Paid, Amount | $ 102 |
Expense Ratio, Percent | 0.89% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares underperformed its benchmark, the Russell 1000 Index, for the 12-month period ending September 30, 2024. The Fund garnered a positive return for the reporting period, but underperformed the benchmark due to its tilt toward value stocks and away from the mega-cap growth stocks that led the market upturn over the period. An underweight to the information technology sector also was a detractor. Among the Fund’s sub-advisors, Brandywine Global Investment Management, LLC lagged the benchmark due to its value orientation and stock selection within the energy and consumer discretionary sectors. LSV Asset Management lagged the benchmark due to its value orientation, an overweight allocation to the energy sector, an underweight to the information technology sector, and security selection within the industrials sector. PineStone Asset Management Inc.’s underperformance was attributable to its lower-beta (a measure of the volatility of an investment relative to a benchmark) tilt and security selection within the information technology and financials sectors. Mar Vista Investment Partners, LLC lagged the benchmark due to its lower-beta tilt, underweights to the mega-cap growth stocks that led the market upturn over the period, and stock selection within the information technology sector. SEI Investments Management Corporation’s (SIMC) factor-based momentum strategy outperformed the benchmark due to stock selection within the industrials and information technology sectors. SIMC’s factor-based quality strategy lagged the benchmark because of stock selection within the information technology sector. Regarding the use of derivatives during the reporting period, the Fund employed equity index futures to provide stock-like performance to the liquidity reserve account, which contained cash available for fund withdrawals. This contributed positively to the Fund’s absolute return for the period. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Tax-Managed Large Cap Fund, Class F Shares - $275767 S&P 500 ® Russell 1000 Index (USD) - $342568 Sep/14 $100000 $100000 $100000 Sep/15 $98013 $99385 $99386 Sep/16 $107250 $114721 $114226 Sep/17 $125683 $136070 $135402 Sep/18 $147033 $160441 $159456 Sep/19 $149118 $167266 $165632 Sep/20 $160807 $192605 $192155 Sep/21 $212005 $250396 $251653 Sep/22 $180806 $211654 $208330 Sep/23 $214152 $257408 $252483 Sep/24 $275767 $350980 $342568 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Tax-Managed Large Cap Fund, Class F Shares 28.77% 13.08% 10.68% S&P 500 ® 36.35% 15.98% 13.38% Russell 1000 Index (USD) 35.68% 15.64% 13.10% |
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 | $ 4,351,207,000 |
Holdings Count | Holding | 269 |
Advisory Fees Paid, Amount | $ 16,393 |
InvestmentCompanyPortfolioTurnover | 15% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $4,351,207 269 $16,393 15% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Affiliated Partnership 0.0% Derivative Contracts (Net) 0.0% Real Estate 1.5% Utilities 2.0% Energy 3.4% Materials 4.3% Cash Equivalent 4.6% Consumer Staples 6.5% Communication Services 7.3% Industrials 10.2% Consumer Discretionary 10.4% Health Care 13.5% Financials 15.7% Information Technology 23.0% 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 Footnote Reference Microsoft Corp 4.8% Apple Inc 3.7% Johnson & Johnson 1.9% Lowe's Cos Inc 1.8% Oracle Corp, Cl B 1.8% Alphabet Inc, Cl A 1.8% Alphabet Inc, Cl C 1.7% Moody's Corp 1.7% JPMorgan Chase & Co 1.6% UnitedHealth Group Inc 1.6% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes Coho Partners, Ltd. was terminated as a Fund sub-advisor during the reporting period. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https:// www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
C000147392 | |
Shareholder Report [Line Items] | |
Fund Name | Tax-Managed Large Cap Fund |
Class Name | Class Y |
Trading Symbol | STLYX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the Tax-Managed Large 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Tax-Managed Large Cap Fund, Class Y Shares $73 0.64% |
Expenses Paid, Amount | $ 73 |
Expense Ratio, Percent | 0.64% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares underperformed its benchmark, the Russell 1000 Index, for the 12-month period ending September 30, 2024. The Fund garnered a positive return for the reporting period, but underperformed the benchmark due to its tilt toward value stocks and away from the mega-cap growth stocks that led the market upturn over the period. An underweight to the information technology sector also was a detractor. Among the Fund’s sub-advisors, Brandywine Global Investment Management, LLC lagged the benchmark due to its value orientation and stock selection within the energy and consumer discretionary sectors. LSV Asset Management lagged the benchmark due to its value orientation, an overweight allocation to the energy sector, an underweight to the information technology sector, and security selection within the industrials sector. PineStone Asset Management Inc.’s underperformance was attributable to its lower-beta (a measure of the volatility of an investment relative to a benchmark) tilt and security selection within the information technology and financials sectors. Mar Vista Investment Partners, LLC lagged the benchmark due to its lower-beta tilt, underweights to the mega-cap growth stocks that led the market upturn over the period, and stock selection within the information technology sector. SEI Investments Management Corporation’s (SIMC) factor-based momentum strategy outperformed the benchmark due to stock selection within the industrials and information technology sectors. SIMC’s factor-based quality strategy lagged the benchmark because of stock selection within the information technology sector. Regarding the use of derivatives during the reporting period, the Fund employed equity index futures to provide stock-like performance to the liquidity reserve account, which contained cash available for fund withdrawals. This contributed positively to the Fund’s absolute return for the period. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Tax-Managed Large Cap Fund, Class Y Shares - $282512 S&P 500 ® Russell 1000 Index (USD) - $342568 Sep/14 $100000 $100000 $100000 Sep/15 $98137 $99385 $99386 Sep/16 $107704 $114721 $114226 Sep/17 $126573 $136070 $135402 Sep/18 $148369 $160441 $159456 Sep/19 $150849 $167266 $165632 Sep/20 $163084 $192605 $192155 Sep/21 $215572 $250396 $251653 Sep/22 $184343 $211654 $208330 Sep/23 $218802 $257408 $252483 Sep/24 $282512 $350980 $342568 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Tax-Managed Large Cap Fund, Class Y Shares 29.12% 13.37% 10.94% S&P 500 ® ) Footnote Reference 36.35% 15.98% 13.38% Russell 1000 Index (USD) 35.68% 15.64% 13.10% |
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 | $ 4,351,207,000 |
Holdings Count | Holding | 269 |
Advisory Fees Paid, Amount | $ 16,393 |
InvestmentCompanyPortfolioTurnover | 15% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $4,351,207 269 $16,393 15% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Affiliated Partnership 0.0% Derivative Contracts (Net) 0.0% Real Estate 1.5% Utilities 2.0% Energy 3.4% Materials 4.3% Cash Equivalent 4.6% Consumer Staples 6.5% Communication Services 7.3% Industrials 10.2% Consumer Discretionary 10.4% Health Care 13.5% Financials 15.7% Information Technology 23.0% 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 Footnote Reference Microsoft Corp 4.8% Apple Inc 3.7% Johnson & Johnson 1.9% Lowe's Cos Inc 1.8% Oracle Corp, Cl B 1.8% Alphabet Inc, Cl A 1.8% Alphabet Inc, Cl C 1.7% Moody's Corp 1.7% JPMorgan Chase & Co 1.6% UnitedHealth Group Inc 1.6% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes Coho Partners, Ltd. was terminated as a Fund sub-advisor during the reporting period. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https:// www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
C000051280 | |
Shareholder Report [Line Items] | |
Fund Name | S&P 500 Index Fund |
Class Name | Class F |
Trading Symbol | SSPIX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the S&P 500 Index 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 S&P 500 Index Fund, Class F Shares $29 0.25% |
Expenses Paid, Amount | $ 29 |
Expense Ratio, Percent | 0.25% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares achieved its objective of tracking, before fees and expenses, the performance of its benchmark, the S&P 500 Index, for the 12-month period ending September 30, 2024. The Fund uses a sub-advisor to manage the Fund’s portfolio under the general supervision of SEI Investments Management Corporation. The sole sub-advisor as of September 30, 2024, was SSGA Funds Management, Inc. The U.S. stock market rallied sharply during the reporting period, led by mega-cap growth stocks. The gains were concentrated in the higher-beta (a measure of an investment’s volatility relative to a benchmark) stocks, and low-beta stocks generally lagged in the bull market. The strongest-performing sector was information technology. The energy sector was the primary market laggard for the period. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | S&P 500 Index Fund, Class F Shares - $340656 S&P 500 ® Sep/14 $100000 $100000 Sep/15 $99027 $99385 Sep/16 $113807 $114721 Sep/17 $134433 $136070 Sep/18 $158005 $160441 Sep/19 $164436 $167266 Sep/20 $188802 $192605 Sep/21 $244932 $250396 Sep/22 $206521 $211654 Sep/23 $250527 $257408 Sep/24 $340656 $350980 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years S&P 500 Index Fund, Class F Shares 35.98% 15.68% 13.04% S&P 500 ® 36.35% 15.98% 13.38% |
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 | $ 1,029,295,000 |
Holdings Count | Holding | 505 |
Advisory Fees Paid, Amount | $ 197 |
InvestmentCompanyPortfolioTurnover | 3% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $1,029,295 505 $197 3% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Cash Collateral 0.0% Derivative Contracts (Net) 0.0% Cash Equivalent 1.9% Materials 2.2% Real Estate 2.3% Utilities 2.5% Energy 3.2% Consumer Staples 5.8% Industrials 8.3% Communication Services 8.7% Consumer Discretionary 9.9% Health Care 11.4% Financials 12.6% Information Technology 31.1% 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 Footnote Reference Apple Inc 7.1% Microsoft Corp 6.4% NVIDIA Corp 6.0% Amazon.com Inc, Cl A 3.5% Meta Platforms Inc, Cl A 2.5% Alphabet Inc, Cl A 2.0% Berkshire Hathaway Inc, Cl B 1.7% Alphabet Inc, Cl C 1.6% Broadcom Inc 1.6% Tesla Inc 1.5% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000051282 | |
Shareholder Report [Line Items] | |
Fund Name | S&P 500 Index Fund |
Class Name | Class I |
Trading Symbol | SPIIX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class I Shares of the S&P 500 Index 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 S&P 500 Index Fund, Class I Shares $77 0.65% |
Expenses Paid, Amount | $ 77 |
Expense Ratio, Percent | 0.65% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class I Shares achieved its objective of tracking, before fees and expenses, the performance of its benchmark, the S&P 500 Index, for the 12-month period ending September 30, 2024. The Fund uses a sub-advisor to manage the Fund’s portfolio under the general supervision of SEI Investments Management Corporation. The sole sub-advisor as of September 30, 2024, was SSGA Funds Management, Inc. The U.S. stock market rallied sharply during the reporting period, led by mega-cap growth stocks. The gains were concentrated in the higher-beta (a measure of an investment’s volatility relative to a benchmark) stocks, and low-beta stocks generally lagged in the bull market. The strongest-performing sector was information technology. The energy sector was the primary market laggard for the period. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | S&P 500 Index Fund, Class I Shares - $329281 S&P 500 ® Sep/14 $100000 $100000 Sep/15 $98810 $99385 Sep/16 $113305 $114721 Sep/17 $133549 $136070 Sep/18 $156431 $160441 Sep/19 $162151 $167266 Sep/20 $185446 $192605 Sep/21 $239608 $250396 Sep/22 $201211 $211654 Sep/23 $243122 $257408 Sep/24 $329281 $350980 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years S&P 500 Index Fund, Class I Shares 35.44% 15.22% 12.66% S&P 500 ® 36.35% 15.98% 13.38% |
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 | $ 1,029,295,000 |
Holdings Count | Holding | 505 |
Advisory Fees Paid, Amount | $ 197 |
InvestmentCompanyPortfolioTurnover | 3% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $1,029,295 505 $197 3% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Cash Collateral 0.0% Derivative Contracts (Net) 0.0% Cash Equivalent 1.9% Materials 2.2% Real Estate 2.3% Utilities 2.5% Energy 3.2% Consumer Staples 5.8% Industrials 8.3% Communication Services 8.7% Consumer Discretionary 9.9% Health Care 11.4% Financials 12.6% Information Technology 31.1% 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 Footnote Reference Apple Inc 7.1% Microsoft Corp 6.4% NVIDIA Corp 6.0% Amazon.com Inc, Cl A 3.5% Meta Platforms Inc, Cl A 2.5% Alphabet Inc, Cl A 2.0% Berkshire Hathaway Inc, Cl B 1.7% Alphabet Inc, Cl C 1.6% Broadcom Inc 1.6% Tesla Inc 1.5% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000078067 | |
Shareholder Report [Line Items] | |
Fund Name | Small Cap Fund |
Class Name | Class F |
Trading Symbol | SLLAX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Small Cap Fund, Class F Shares $129 1.14% |
Expenses Paid, Amount | $ 129 |
Expense Ratio, Percent | 1.14% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares modestly underperformed its benchmark, the Russell 2000 Index, for the 12-month period ending September 30, 2024. Los Angeles Capital Management LLC (LA Capital) was the top performing Fund sub-advisor over the reporting period. LA Capital’s trend-following approach benefited from momentum style tailwinds, as well as positive stock selection in the health care sector. Easterly Investment Partners LLC also outperformed the Fund’s benchmark, the Russell 2000 Index, bucking relatively modest returns from its value factor position through the merits of positive stock selection—namely in the financials and technology sectors. EAM Investors, LLC also outperformed the benchmark by a significant margin during the period, as the manager also benefited from momentum style tailwinds over the period. For the period in which they managed the Fund, both the quantitative investment management (QIM) team within SIMC and Hillsdale Investment Management (Hillsdale) contributed positively to Fund performance on momentum tailwinds as well. Leeward Investments LLC underperformed over this time frame due to the relatively modest returns from its the value factor position and quality headwinds. Copeland Capital Management, LLC also faced quality headwinds, though the sub-advisor surprisingly underperformed in the latter half of the reporting period when low-volatility strategies saw positive returns. This was attributable largely to poor performance in the energy sector. On a sector basis, overall allocation effects had a somewhat negative effect on Fund performance due largely to a modest overweight allocation towards the end of the reporting period when the sector dramatically underperformed. Overall, stock selection bolstered Fund performance, however, particularly in the industrials and financials sectors. This was partially offset by the negative stock selection in technology. The Fund’s substantial bias towards valuation was a prominent headwind to performance over the reporting period, as the factor failed to outperform. A similar dynamic emerged with the Fund’s higher-quality exposure as well. Momentum contributed modestly to Fund performance over the period. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Small Cap Fund, Class F Shares - $214953 S&P 500 ® Russell 2000 Index (USD) - $232101 Sep/14 $100000 $100000 $100000 Sep/15 $99755 $99385 $101246 Sep/16 $107496 $114721 $116906 Sep/17 $122853 $136070 $141155 Sep/18 $141967 $160441 $162664 Sep/19 $126568 $167266 $148205 Sep/20 $123279 $192605 $148783 Sep/21 $187216 $250396 $219719 Sep/22 $153552 $211654 $168090 Sep/23 $170224 $257408 $183100 Sep/24 $214953 $350980 $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 Small Cap Fund, Class F Shares 26.28% 11.17% 7.95% S&P 500 ® 36.35% 15.98% 13.38% 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 | $ 601,695,000 |
Holdings Count | Holding | 676 |
Advisory Fees Paid, Amount | $ 3,234 |
InvestmentCompanyPortfolioTurnover | 106% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $601,695 676 $3,234 106% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Derivative Contracts (Net) 0.0% Cash Equivalent 0.7% Utilities 1.3% Communication Services 1.8% Consumer Staples 4.0% Materials 4.7% Real Estate 5.1% Energy 5.2% Information Technology 9.8% Consumer Discretionary 12.3% Health Care 14.5% Industrials 18.2% Financials 22.3% 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 Footnote Reference Columbia Banking System Inc 1.1% Hamilton Lane Inc, Cl A 1.1% Modine Manufacturing Co 1.0% Old National Bancorp/IN, Cl A 0.9% Sprouts Farmers Market Inc 0.8% Jackson Financial Inc, Cl A 0.8% CNO Financial Group Inc 0.8% Photronics Inc 0.7% Urban Outfitters Inc 0.7% Encompass Health Corp 0.7% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes During the reporting period, Hillsdale was terminated and the QIM team was added to directly manage a sleeve of the Fund. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
C000147401 | |
Shareholder Report [Line Items] | |
Fund Name | Small Cap Fund |
Class Name | Class Y |
Trading Symbol | SMYFX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Small Cap Fund, Class Y Shares $101 0.89% |
Expenses Paid, Amount | $ 101 |
Expense Ratio, Percent | 0.89% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares modestly underperformed its benchmark, the Russell 2000 Index, for the 12-month period ending September 30, 2024. Los Angeles Capital Management LLC (LA Capital) was the top performing Fund sub-advisor over the reporting period. LA Capital’s trend-following approach benefited from momentum style tailwinds, as well as positive stock selection in the health care sector. Easterly Investment Partners LLC also outperformed the Fund’s benchmark, the Russell 2000 Index, bucking relatively modest returns from its value factor position through the merits of positive stock selection—namely in the financials and technology sectors. EAM Investors, LLC also outperformed the benchmark by a significant margin during the period, as the manager also benefited from momentum style tailwinds over the period. For the period in which they managed the Fund, both the quantitative investment management (QIM) team within SIMC and Hillsdale Investment Management (Hillsdale) contributed positively to Fund performance on momentum tailwinds as well. Leeward Investments LLC underperformed over this time frame due to the relatively modest returns from its the value factor position and quality headwinds. Copeland Capital Management, LLC also faced quality headwinds, though the sub-advisor surprisingly underperformed in the latter half of the reporting period when low-volatility strategies saw positive returns. This was attributable largely to poor performance in the energy sector. On a sector basis, overall allocation effects had a somewhat negative effect on Fund performance due largely to a modest overweight allocation towards the end of the reporting period when the sector dramatically underperformed. Overall, stock selection bolstered Fund performance, however, particularly in the industrials and financials sectors. This was partially offset by the negative stock selection in technology. The Fund’s substantial bias towards valuation was a prominent headwind to performance over the reporting period, as the factor failed to outperform. A similar dynamic emerged with the Fund’s higher-quality exposure as well. Momentum contributed modestly to Fund performance over the period. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Small Cap Fund, Class Y Shares - $220111 S&P 500 ® Russell 2000 Index (USD) - $232101 Sep/14 $100000 $100000 $100000 Sep/15 $99922 $99385 $101246 Sep/16 $107996 $114721 $116906 Sep/17 $123670 $136070 $141155 Sep/18 $143252 $160441 $162664 Sep/19 $127984 $167266 $148205 Sep/20 $125129 $192605 $148783 Sep/21 $190379 $250396 $219719 Sep/22 $156521 $211654 $168090 Sep/23 $174021 $257408 $183100 Sep/24 $220111 $350980 $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 Small Cap Fund, Class Y Shares 26.49% 11.45% 8.21% S&P 500 ® ) Footnote Reference 36.35% 15.98% 13.38% 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 | $ 601,695,000 |
Holdings Count | Holding | 676 |
Advisory Fees Paid, Amount | $ 3,234 |
InvestmentCompanyPortfolioTurnover | 106% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $601,695 676 $3,234 106% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Derivative Contracts (Net) 0.0% Cash Equivalent 0.7% Utilities 1.3% Communication Services 1.8% Consumer Staples 4.0% Materials 4.7% Real Estate 5.1% Energy 5.2% Information Technology 9.8% Consumer Discretionary 12.3% Health Care 14.5% Industrials 18.2% Financials 22.3% 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 Footnote Reference Columbia Banking System Inc 1.1% Hamilton Lane Inc, Cl A 1.1% Modine Manufacturing Co 1.0% Old National Bancorp/IN, Cl A 0.9% Sprouts Farmers Market Inc 0.8% Jackson Financial Inc, Cl A 0.8% CNO Financial Group Inc 0.8% Photronics Inc 0.7% Urban Outfitters Inc 0.7% Encompass Health Corp 0.7% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes During the reporting period, Hillsdale was terminated and the QIM team was added to directly manage a sleeve of the Fund. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
C000018195 | |
Shareholder Report [Line Items] | |
Fund Name | Small Cap Value Fund |
Class Name | Class F |
Trading Symbol | SESVX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the Small Cap Value 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Small Cap Value Fund, Class F Shares $127 1.14% |
Expenses Paid, Amount | $ 127 |
Expense Ratio, Percent | 1.14% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares underperformed its benchmark, the Russell 2000 Value Index, for the 12-month period ending September 30, 2024. Easterly Investment Partners LLC (Easterly) was the top performer among the Fund’s sub-advisors during the reporting period. Easterly outperformed the benchmark Russell 2000 Value Index due largely to positive stock selection within the information technology and financials sectors. Positions in Brinker International, Jackson Financial, and Super Micro Computer comprised a significant amount of Easterly’s outperformance relative to the benchmark. Easterly exited the position in Super Micro during the reporting period following the stock’s strong performance. During its time in the Fund, Leeward Investments LLC (Leeward) performed roughly in line with the benchmark. The manager faced quality style headwinds, but benefited from positive returns for low-volatility stocks in the latter half of the reporting period. For the period of time in which Cardinal Capital Management, L.L.C. (Cardinal) was in the Fund, the sub-advisor underperformed due to weak stock selection in the consumer discretionary, health care, and materials sectors. The value strategies of both LSV Asset Management and the Quantitative investment management (QIM) team within SIMC underperformed on value style headwinds. The Fund’s overall sector allocation detracted modestly from performance, particularly an underweight allocation to financials and an overweight to consumer staples. This was partially offset by the positive impact of an underweight to utilities. Stock selection also weighed on performance, primarily within the health care sector, as the Fund did not hold several strong-performing biotechnology stocks—an industry in which the Fund’s sub-advisors are perennially underweight—as well as weak stock selection in health care providers and services. At the factor level, Fund performance was hampered by a large overweight to the cheapest, highest-quality stocks in the Russell 2000 Value Index. Although there were modest tailwinds from the underperformance of expensive, low-quality stocks, there was a more significant headwind from the lagging performance of cheap, high-quality names. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Small Cap Value Fund, Class F Shares - $194094 S&P 500 ® Russell 2000 Value Index (USD) - $220417 Sep/14 $100000 $100000 $100000 Sep/15 $99245 $99385 $98398 Sep/16 $110761 $114721 $116905 Sep/17 $128054 $136070 $140928 Sep/18 $136771 $160441 $154074 Sep/19 $123615 $167266 $141370 Sep/20 $103803 $192605 $120334 Sep/21 $165496 $250396 $197257 Sep/22 $138044 $211654 $162370 Sep/23 $157344 $257408 $175103 Sep/24 $194094 $350980 $220417 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Small Cap Value Fund, Class F Shares 23.36% 9.44% 6.86% S&P 500 ® 36.35% 15.98% 13.38% Russell 2000 Value Index (USD) 25.88% 9.29% 8.22% |
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 | $ 367,694,000 |
Holdings Count | Holding | 446 |
Advisory Fees Paid, Amount | $ 2,027 |
InvestmentCompanyPortfolioTurnover | 57% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $367,694 446 $2,027 57% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Affiliated Partnership 0.0% Derivative Contracts (Net) 0.0% Cash Equivalent 1.1% Utilities 1.8% Communication Services 2.0% Consumer Staples 3.9% Materials 6.1% Real Estate 6.5% Information Technology 6.7% Health Care 7.1% Energy 8.1% Consumer Discretionary 13.2% Industrials 15.2% Financials 28.2% 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 Footnote Reference CNO Financial Group Inc 1.8% Jackson Financial Inc, Cl A 1.7% Columbia Banking System Inc 1.2% Old National Bancorp/IN, Cl A 1.2% Photronics Inc 1.0% Commercial Metals Co, Cl A 0.9% Zions Bancorp NA 0.9% Highwoods Properties Inc 0.9% Sanmina Corp 0.8% OFG Bancorp 0.8% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes During the reporting period, Cardinal was removed as a Fund sub-advisor, while Leeward was added as a Fund sub-advisor. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
C000018194 | |
Shareholder Report [Line Items] | |
Fund Name | Small Cap Value Fund |
Class Name | Class I |
Trading Symbol | SMVIX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class I Shares of the Small Cap Value 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Small Cap Value Fund, Class I Shares $152 1.36% |
Expenses Paid, Amount | $ 152 |
Expense Ratio, Percent | 1.36% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class I Shares underperformed its benchmark, the Russell 2000 Value Index, for the 12-month period ending September 30, 2024. Easterly Investment Partners LLC (Easterly) was the top performer among the Fund’s sub-advisors during the reporting period. Easterly outperformed the benchmark Russell 2000 Value Index due largely to positive stock selection within the information technology and financials sectors. Positions in Brinker International, Jackson Financial, and Super Micro Computer comprised a significant amount of Easterly’s outperformance relative to the benchmark. Easterly exited the position in Super Micro during the reporting period following the stock’s strong performance. During its time in the Fund, Leeward Investments LLC (Leeward) performed roughly in line with the benchmark. The manager faced quality style headwinds, but benefited from positive returns for low-volatility stocks in the latter half of the reporting period. For the period of time in which Cardinal Capital Management, L.L.C. (Cardinal) was in the Fund, the sub-advisor underperformed due to weak stock selection in the consumer discretionary, health care, and materials sectors. The value strategies of both LSV Asset Management and the Quantitative investment management (QIM) team within SIMC underperformed on value style headwinds. The Fund’s overall sector allocation detracted modestly from performance, particularly an underweight allocation to financials and an overweight to consumer staples. This was partially offset by the positive impact of an underweight to utilities. Stock selection also weighed on performance, primarily within the health care sector, as the Fund did not hold several strong-performing biotechnology stocks—an industry in which the Fund’s sub-advisors are perennially underweight—as well as weak stock selection in health care providers and services. At the factor level, Fund performance was hampered by a large overweight to the cheapest, highest-quality stocks in the Russell 2000 Value Index. Although there were modest tailwinds from the underperformance of expensive, low-quality stocks, there was a more significant headwind from the lagging performance of cheap, high-quality names. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Small Cap Value Fund, Class I Shares - $189789 S&P 500 ® Russell 2000 Value Index (USD) - $220417 Sep/14 $100000 $100000 $100000 Sep/15 $99013 $99385 $98398 Sep/16 $110238 $114721 $116905 Sep/17 $127177 $136070 $140928 Sep/18 $135561 $160441 $154074 Sep/19 $122239 $167266 $141370 Sep/20 $102438 $192605 $120334 Sep/21 $162926 $250396 $197257 Sep/22 $135609 $211654 $162370 Sep/23 $154194 $257408 $175103 Sep/24 $189789 $350980 $220417 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Small Cap Value Fund, Class I Shares 23.08% 9.20% 6.62% S&P 500 ® 36.35% 15.98% 13.38% Russell 2000 Value Index (USD) 25.88% 9.29% 8.22% |
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 | $ 367,694,000 |
Holdings Count | Holding | 446 |
Advisory Fees Paid, Amount | $ 2,027 |
InvestmentCompanyPortfolioTurnover | 57% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $367,694 446 $2,027 57% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Affiliated Partnership 0.0% Derivative Contracts (Net) 0.0% Cash Equivalent 1.1% Utilities 1.8% Communication Services 2.0% Consumer Staples 3.9% Materials 6.1% Real Estate 6.5% Information Technology 6.7% Health Care 7.1% Energy 8.1% Consumer Discretionary 13.2% Industrials 15.2% Financials 28.2% 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 Footnote Reference CNO Financial Group Inc 1.8% Jackson Financial Inc, Cl A 1.7% Columbia Banking System Inc 1.2% Old National Bancorp/IN, Cl A 1.2% Photronics Inc 1.0% Commercial Metals Co, Cl A 0.9% Zions Bancorp NA 0.9% Highwoods Properties Inc 0.9% Sanmina Corp 0.8% OFG Bancorp 0.8% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes During the reporting period, Cardinal was removed as a Fund sub-advisor, while Leeward was added as a Fund sub-advisor. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
C000147388 | |
Shareholder Report [Line Items] | |
Fund Name | Small Cap Value Fund |
Class Name | Class Y |
Trading Symbol | SPVYX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the Small Cap Value 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Small Cap Value Fund, Class Y Shares $100 0.89% |
Expenses Paid, Amount | $ 100 |
Expense Ratio, Percent | 0.89% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares underperformed its benchmark, the Russell 2000 Value Index, for the 12-month period ending September 30, 2024. Easterly Investment Partners LLC (Easterly) was the top performer among the Fund’s sub-advisors during the reporting period. Easterly outperformed the benchmark Russell 2000 Value Index due largely to positive stock selection within the information technology and financials sectors. Positions in Brinker International, Jackson Financial, and Super Micro Computer comprised a significant amount of Easterly’s outperformance relative to the benchmark. Easterly exited the position in Super Micro during the reporting period following the stock’s strong performance. During its time in the Fund, Leeward Investments LLC (Leeward) performed roughly in line with the benchmark. The manager faced quality style headwinds, but benefited from positive returns for low-volatility stocks in the latter half of the reporting period. For the period of time in which Cardinal Capital Management, L.L.C. (Cardinal) was in the Fund, the sub-advisor underperformed due to weak stock selection in the consumer discretionary, health care, and materials sectors. The value strategies of both LSV Asset Management and the Quantitative investment management (QIM) team within SIMC underperformed on value style headwinds. The Fund’s overall sector allocation detracted modestly from performance, particularly an underweight allocation to financials and an overweight to consumer staples. This was partially offset by the positive impact of an underweight to utilities. Stock selection also weighed on performance, primarily within the health care sector, as the Fund did not hold several strong-performing biotechnology stocks—an industry in which the Fund’s sub-advisors are perennially underweight—as well as weak stock selection in health care providers and services. At the factor level, Fund performance was hampered by a large overweight to the cheapest, highest-quality stocks in the Russell 2000 Value Index. Although there were modest tailwinds from the underperformance of expensive, low-quality stocks, there was a more significant headwind from the lagging performance of cheap, high-quality names. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Small Cap Value Fund, Class Y Shares - $198457 S&P 500 ® Russell 2000 Value Index (USD) - $220417 Sep/14 $100000 $100000 $100000 Sep/15 $99245 $99385 $98398 Sep/16 $111009 $114721 $116905 Sep/17 $128704 $136070 $140928 Sep/18 $137801 $160441 $154074 Sep/19 $124824 $167266 $141370 Sep/20 $105107 $192605 $120334 Sep/21 $168006 $250396 $197257 Sep/22 $140455 $211654 $162370 Sep/23 $160565 $257408 $175103 Sep/24 $198457 $350980 $220417 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Small Cap Value Fund, Class Y Shares 23.60% 9.72% 7.09% S&P 500 ® ) Footnote Reference 36.35% 15.98% 13.38% Russell 2000 Value Index (USD) 25.88% 9.29% 8.22% |
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 | $ 367,694,000 |
Holdings Count | Holding | 446 |
Advisory Fees Paid, Amount | $ 2,027 |
InvestmentCompanyPortfolioTurnover | 57% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $367,694 446 $2,027 57% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Affiliated Partnership 0.0% Derivative Contracts (Net) 0.0% Cash Equivalent 1.1% Utilities 1.8% Communication Services 2.0% Consumer Staples 3.9% Materials 6.1% Real Estate 6.5% Information Technology 6.7% Health Care 7.1% Energy 8.1% Consumer Discretionary 13.2% Industrials 15.2% Financials 28.2% 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 Footnote Reference CNO Financial Group Inc 1.8% Jackson Financial Inc, Cl A 1.7% Columbia Banking System Inc 1.2% Old National Bancorp/IN, Cl A 1.2% Photronics Inc 1.0% Commercial Metals Co, Cl A 0.9% Zions Bancorp NA 0.9% Highwoods Properties Inc 0.9% Sanmina Corp 0.8% OFG Bancorp 0.8% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes During the reporting period, Cardinal was removed as a Fund sub-advisor, while Leeward was added as a Fund sub-advisor. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
C000018191 | |
Shareholder Report [Line Items] | |
Fund Name | Small Cap Growth Fund |
Class Name | Class F |
Trading Symbol | SSCGX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the Small Cap Growth 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Small Cap Growth Fund, Class F Shares $127 1.11% |
Expenses Paid, Amount | $ 127 |
Expense Ratio, Percent | 1.11% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares outperformed its benchmark, the Russell 2000 Growth Index, for the 12-month period ending September 30, 2024. The momentum managers garnered the highest returns among the Fund’s sub-advisors, as the momentum factor saw strong performance over the reporting period. The SIMC quantitative investment management (QIM) team’s momentum strategy benefited from tailwinds to the momentum factor as well as strong stock selection within the consumer discretionary sector. Jackson Creek Investment Advisors LLC outperformed on momentum tailwinds, and later in the period benefited from the positive returns of the lower-volatility factor. Stock selection in the consumer discretionary and health care sectors also enhanced performance. EAM Investors, LLC moderately outperformed the Fund’s benchmark due to momentum style tailwinds. However, the manager also faced moderate headwinds later in the reporting period due to the portfolio’s higher-volatility posture. For the period in which the sub-advisor was in the Fund, ArrowMark Colorado Holdings, LLC (ArrowMark) contributed positively to Fund performance due largely to a strength in the biotechnology space. For the period in which the manager was in the Fund, Polen Capital Management, LLC (Polen) underperformed the benchmark amid quality style headwinds and weak stock selection within the health care and consumer discretionary sectors. Regarding sector allocation, Fund performance was hampered by an overweight allocation to the energy sector, which sold off late in the period, and an overall underweight to information technology, which performed well until late in the period. Performance benefited from stock selection in industrials, health care, consumer discretionary, and financials. This was only partially offset by weak stock selection in information technology. Regarding factors, the Fund’s bias towards the cheapest names in the Russell 2000 Growth Index and its tilt towards the highest-quality names in the index hampered performance. The Fund’s positive momentum exposure had a positive impact. A slightly lower beta posture enhanced Fund performance over the period, while its somewhat smaller market-cap exposure was a modest detractor. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Small Cap Growth Fund, Class F Shares - $220817 S&P 500 ® Russell 2000 Growth Index (USD) - $235600 Sep/14 $100000 $100000 $100000 Sep/15 $102505 $99385 $104044 Sep/16 $111214 $114721 $116658 Sep/17 $132640 $136070 $141134 Sep/18 $166130 $160441 $170863 Sep/19 $143049 $167266 $154402 Sep/20 $151175 $192605 $178666 Sep/21 $212804 $250396 $238099 Sep/22 $159137 $211654 $168403 Sep/23 $170771 $257408 $184556 Sep/24 $220817 $350980 $235600 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Small Cap Growth Fund, Class F Shares 29.31% 9.07% 8.24% S&P 500 ® 36.35% 15.98% 13.38% Russell 2000 Growth Index (USD) 27.66% 8.82% 8.95% |
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 | $ 364,360,000 |
Holdings Count | Holding | 360 |
Advisory Fees Paid, Amount | $ 1,817 |
InvestmentCompanyPortfolioTurnover | 192% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $364,360 360 $1,817 192% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Affiliated Partnership 0.0% Derivative Contracts (Net) 0.0% Cash Equivalent 1.0% Utilities 1.1% Communication Services 1.4% Materials 2.8% Energy 3.1% Real Estate 3.7% Consumer Staples 4.1% Consumer Discretionary 13.9% Financials 14.9% Information Technology 15.1% Industrials 17.9% Health Care 20.9% 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 Footnote Reference Hamilton Lane Inc, Cl A 1.7% Sprouts Farmers Market Inc 1.5% ExlService Holdings Inc 1.2% Modine Manufacturing Co 1.1% Mr Cooper Group Inc 1.0% Fabrinet 1.0% CommVault Systems 1.0% KB Home 1.0% Badger Meter Inc 0.9% Medpace Holdings Inc 0.9% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes Over the reporting period, ArrowMark was removed from the Fund’s sub-advisors, while Polen was added as a manager. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
C000018190 | |
Shareholder Report [Line Items] | |
Fund Name | Small Cap Growth Fund |
Class Name | Class I |
Trading Symbol | SPWIX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class I Shares of the Small Cap Growth 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Small Cap Growth Fund, Class I Shares $156 1.36% |
Expenses Paid, Amount | $ 156 |
Expense Ratio, Percent | 1.36% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class I Shares outperformed its benchmark, the Russell 2000 Growth Index, for the 12-month period ending September 30, 2024. The momentum managers garnered the highest returns among the Fund’s sub-advisors, as the momentum factor saw strong performance over the reporting period. The SIMC quantitative investment management (QIM) team’s momentum strategy benefited from tailwinds to the momentum factor as well as strong stock selection within the consumer discretionary sector. Jackson Creek Investment Advisors LLC outperformed on momentum tailwinds, and later in the period benefited from the positive returns of the lower-volatility factor. Stock selection in the consumer discretionary and health care sectors also enhanced performance. EAM Investors, LLC moderately outperformed the Fund’s benchmark due to momentum style tailwinds. However, the manager also faced moderate headwinds later in the reporting period due to the portfolio’s higher-volatility posture. For the period in which the sub-advisor was in the Fund, ArrowMark Colorado Holdings, LLC (ArrowMark) contributed positively to Fund performance due largely to a strength in the biotechnology space. For the period in which the manager was in the Fund, Polen Capital Management, LLC (Polen) underperformed the benchmark amid quality style headwinds and weak stock selection within the health care and consumer discretionary sectors. Regarding sector allocation, Fund performance was hampered by an overweight allocation to the energy sector, which sold off late in the period, and an overall underweight to information technology, which performed well until late in the period. Performance benefited from stock selection in industrials, health care, consumer discretionary, and financials. This was only partially offset by weak stock selection in information technology. Regarding factors, the Fund’s bias towards the cheapest names in the Russell 2000 Growth Index and its tilt towards the highest-quality names in the index hampered performance. The Fund’s positive momentum exposure had a positive impact. A slightly lower beta posture enhanced Fund performance over the period, while its somewhat smaller market-cap exposure was a modest detractor. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Small Cap Growth Fund, Class I Shares - $215312 S&P 500 ® Russell 2000 Growth Index (USD) - $235600 Sep/14 $100000 $100000 $100000 Sep/15 $102227 $99385 $104044 Sep/16 $110656 $114721 $116658 Sep/17 $131650 $136070 $141134 Sep/18 $164455 $160441 $170863 Sep/19 $141224 $167266 $154402 Sep/20 $148910 $192605 $178666 Sep/21 $209102 $250396 $238099 Sep/22 $155967 $211654 $168403 Sep/23 $166939 $257408 $184556 Sep/24 $215312 $350980 $235600 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Small Cap Growth Fund, Class I Shares 28.98% 8.80% 7.97% S&P 500 ® 36.35% 15.98% 13.38% Russell 2000 Growth Index (USD) 27.66% 8.82% 8.95% |
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 | $ 364,360,000 |
Holdings Count | Holding | 360 |
Advisory Fees Paid, Amount | $ 1,817 |
InvestmentCompanyPortfolioTurnover | 192% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $364,360 360 $1,817 192% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Affiliated Partnership 0.0% Derivative Contracts (Net) 0.0% Cash Equivalent 1.0% Utilities 1.1% Communication Services 1.4% Materials 2.8% Energy 3.1% Real Estate 3.7% Consumer Staples 4.1% Consumer Discretionary 13.9% Financials 14.9% Information Technology 15.1% Industrials 17.9% Health Care 20.9% 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 Footnote Reference Hamilton Lane Inc, Cl A 1.7% Sprouts Farmers Market Inc 1.5% ExlService Holdings Inc 1.2% Modine Manufacturing Co 1.1% Mr Cooper Group Inc 1.0% Fabrinet 1.0% CommVault Systems 1.0% KB Home 1.0% Badger Meter Inc 0.9% Medpace Holdings Inc 0.9% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes Over the reporting period, ArrowMark was removed from the Fund’s sub-advisors, while Polen was added as a manager. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
C000147386 | |
Shareholder Report [Line Items] | |
Fund Name | Small Cap Growth Fund |
Class Name | Class Y |
Trading Symbol | SMAYX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the Small Cap Growth 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Small Cap Growth Fund, Class Y Shares $99 0.86% |
Expenses Paid, Amount | $ 99 |
Expense Ratio, Percent | 0.86% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares outperformed its benchmark, the Russell 2000 Growth Index, for the 12-month period ending September 30, 2024. The momentum managers garnered the highest returns among the Fund’s sub-advisors, as the momentum factor saw strong performance over the reporting period. The SIMC quantitative investment management (QIM) team’s momentum strategy benefited from tailwinds to the momentum factor as well as strong stock selection within the consumer discretionary sector. Jackson Creek Investment Advisors LLC outperformed on momentum tailwinds, and later in the period benefited from the positive returns of the lower-volatility factor. Stock selection in the consumer discretionary and health care sectors also enhanced performance. EAM Investors, LLC moderately outperformed the Fund’s benchmark due to momentum style tailwinds. However, the manager also faced moderate headwinds later in the reporting period due to the portfolio’s higher-volatility posture. For the period in which the sub-advisor was in the Fund, ArrowMark Colorado Holdings, LLC (ArrowMark) contributed positively to Fund performance due largely to a strength in the biotechnology space. For the period in which the manager was in the Fund, Polen Capital Management, LLC (Polen) underperformed the benchmark amid quality style headwinds and weak stock selection within the health care and consumer discretionary sectors. Regarding sector allocation, Fund performance was hampered by an overweight allocation to the energy sector, which sold off late in the period, and an overall underweight to information technology, which performed well until late in the period. Performance benefited from stock selection in industrials, health care, consumer discretionary, and financials. This was only partially offset by weak stock selection in information technology. Regarding factors, the Fund’s bias towards the cheapest names in the Russell 2000 Growth Index and its tilt towards the highest-quality names in the index hampered performance. The Fund’s positive momentum exposure had a positive impact. A slightly lower beta posture enhanced Fund performance over the period, while its somewhat smaller market-cap exposure was a modest detractor. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Small Cap Growth Fund, Class Y Shares - $225802 S&P 500 ® Russell 2000 Growth Index (USD) - $235600 Sep/14 $100000 $100000 $100000 Sep/15 $102505 $99385 $104044 Sep/16 $111484 $114721 $116658 Sep/17 $133297 $136070 $141134 Sep/18 $167329 $160441 $170863 Sep/19 $144433 $167266 $154402 Sep/20 $153050 $192605 $178666 Sep/21 $215965 $250396 $238099 Sep/22 $161953 $211654 $168403 Sep/23 $174227 $257408 $184556 Sep/24 $225802 $350980 $235600 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Small Cap Growth Fund, Class Y Shares 29.60% 9.35% 8.49% S&P 500 ® ) Footnote Reference 36.35% 15.98% 13.38% Russell 2000 Growth Index (USD) 27.66% 8.82% 8.95% |
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 | $ 364,360,000 |
Holdings Count | Holding | 360 |
Advisory Fees Paid, Amount | $ 1,817 |
InvestmentCompanyPortfolioTurnover | 192% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $364,360 360 $1,817 192% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Affiliated Partnership 0.0% Derivative Contracts (Net) 0.0% Cash Equivalent 1.0% Utilities 1.1% Communication Services 1.4% Materials 2.8% Energy 3.1% Real Estate 3.7% Consumer Staples 4.1% Consumer Discretionary 13.9% Financials 14.9% Information Technology 15.1% Industrials 17.9% Health Care 20.9% 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 Footnote Reference Hamilton Lane Inc, Cl A 1.7% Sprouts Farmers Market Inc 1.5% ExlService Holdings Inc 1.2% Modine Manufacturing Co 1.1% Mr Cooper Group Inc 1.0% Fabrinet 1.0% CommVault Systems 1.0% KB Home 1.0% Badger Meter Inc 0.9% Medpace Holdings Inc 0.9% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes Over the reporting period, ArrowMark was removed from the Fund’s sub-advisors, while Polen was added as a manager. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
C000018202 | |
Shareholder Report [Line Items] | |
Fund Name | Tax-Managed Small/Mid Cap Fund |
Class Name | Class F |
Trading Symbol | STMSX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the Tax-Managed Small/Mid 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Tax-Managed Small/Mid Cap Fund, Class F Shares $126 1.11% |
Expenses Paid, Amount | $ 126 |
Expense Ratio, Percent | 1.11% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares outperformed its benchmark, the Russell 2500 Index, for the 12-month period ending September 30, 2024. Hillsdale Investment Management Inc. was the top-performing Fund manager over the reporting period, benefiting mainly from positive momentum tailwinds. Easterly Investment Partners LLC also outperformed due to positive stock selection—namely in the financials and information technology sectors. Martingale Asset Management, LP bolstered Fund performance due to a positive trend for low-volatility stocks that developed in the latter half of the reporting period. During its tenure as a Fund manager, Geneva Capital Management LLC (Geneva) contributed positively to performance, attributable to tailwinds to low volatility, as well as positive stock selection within the information technology and consumer discretionary sectors. Additionally, the quantitative investment management (QIM) team’s momentum strategy outperformed due to momentum style tailwinds, partially offset by the strategy’s bias towards higher-quality names. Rice Hall James & Associates, LLC (Rice Hall) performed in line with the benchmark during its tenure as a Fund manager, while Cardinal Capital Management, LLC (Cardinal) underperformed on stock-specific results. QIM’s value strategy also underperformed as value remained largely out of favor. Overall sector allocation hampered Fund performance for the reporting period due largely to an underweight allocation to the utilities and energy sectors. Stock selection bolstered Fund performance. Stock selection in the financials, information technology, consumer staples, and industrials sectors contributed to Fund performance, partially offset by holdings in health care. The negative impact of an overweight allocation to the cheapest names in the index was offset by the positive contribution of an underweight to the most expensive stocks. The Fund’s high-quality exposure detracted from performance, while the exposure to the momentum factor had a positive impact. An underweight to the largest companies in the index detracted modestly from Fund performance. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Tax-Managed Small/Mid Cap Fund, Class F Shares - $209997 S&P 500 ® Russell 2500 Index (USD) - $247726 Sep/14 $100000 $100000 $100000 Sep/15 $100579 $99385 $100379 Sep/16 $109181 $114721 $114869 Sep/17 $127643 $136070 $135307 Sep/18 $147281 $160441 $157218 Sep/19 $135104 $167266 $150859 Sep/20 $127710 $192605 $154207 Sep/21 $184567 $250396 $223644 Sep/22 $149574 $211654 $176438 Sep/23 $164850 $257408 $196348 Sep/24 $209997 $350980 $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 Tax-Managed Small/Mid Cap Fund, Class F Shares 27.39% 9.22% 7.70% S&P 500 ® 36.35% 15.98% 13.38% 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 | $ 887,533,000 |
Holdings Count | Holding | 646 |
Advisory Fees Paid, Amount | $ 4,767 |
InvestmentCompanyPortfolioTurnover | 57% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $887,533 646 $4,767 57% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Rights 0.0% Derivative Contracts (Net) 0.0% Utilities 1.0% Cash Equivalent 1.1% Communication Services 2.2% Energy 3.9% Real Estate 4.0% Consumer Staples 5.0% Materials 6.1% Consumer Discretionary 10.3% Health Care 10.9% Information Technology 13.6% Industrials 20.4% Financials 21.4% 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 Footnote Reference Jackson Financial Inc, Cl A 1.7% Columbia Banking System Inc 1.2% CNO Financial Group Inc 1.2% Commercial Metals Co, Cl A 1.1% Modine Manufacturing Co 1.0% Pilgrim's Pride Corp 1.0% Lincoln National Corp 1.0% Axon Enterprise Inc 0.8% Highwoods Properties Inc 0.8% Delek US Holdings Inc 0.8% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes During the reporting period, Rice Hall and Cardinal were removed as Fund managers, while Geneva was added. In addition, the QIM team was added to directly manage a sleeve of the Fund. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports or upon request at 1-800-DIAL-SEI. |
C000147393 | |
Shareholder Report [Line Items] | |
Fund Name | Tax-Managed Small/Mid Cap Fund |
Class Name | Class Y |
Trading Symbol | STMPX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the Tax-Managed Small/Mid 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Tax-Managed Small/Mid Cap Fund, Class Y Shares $101 0.89% |
Expenses Paid, Amount | $ 101 |
Expense Ratio, Percent | 0.89% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares outperformed its benchmark, the Russell 2500 Index, for the 12-month period ending September 30, 2024. Hillsdale Investment Management Inc. was the top-performing Fund manager over the reporting period, benefiting mainly from positive momentum tailwinds. Easterly Investment Partners LLC also outperformed due to positive stock selection—namely in the financials and information technology sectors. Martingale Asset Management, LP bolstered Fund performance due to a positive trend for low-volatility stocks that developed in the latter half of the reporting period. During its tenure as a Fund manager, Geneva Capital Management LLC (Geneva) contributed positively to performance, attributable to tailwinds to low volatility, as well as positive stock selection within the information technology and consumer discretionary sectors. Additionally, the quantitative investment management (QIM) team’s momentum strategy outperformed due to momentum style tailwinds, partially offset by the strategy’s bias towards higher-quality names. Rice Hall James & Associates, LLC (Rice Hall) performed in line with the benchmark during its tenure as a Fund manager, while Cardinal Capital Management, LLC (Cardinal) underperformed on stock-specific results. QIM’s value strategy also underperformed as value remained largely out of favor. Overall sector allocation hampered Fund performance for the reporting period due largely to an underweight allocation to the utilities and energy sectors. Stock selection bolstered Fund performance. Stock selection in the financials, information technology, consumer staples, and industrials sectors contributed to Fund performance, partially offset by holdings in health care. The negative impact of an overweight allocation to the cheapest names in the index was offset by the positive contribution of an underweight to the most expensive stocks. The Fund’s high-quality exposure detracted from performance, while the exposure to the momentum factor had a positive impact. An underweight to the largest companies in the index detracted modestly from Fund performance. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Tax-Managed Small/Mid Cap Fund, Class Y Shares - $214554 S&P 500 ® Russell 2500 Index (USD) - $247726 Sep/14 $100000 $100000 $100000 Sep/15 $100746 $99385 $100379 Sep/16 $109603 $114721 $114869 Sep/17 $128392 $136070 $135307 Sep/18 $148543 $160441 $157218 Sep/19 $136480 $167266 $150859 Sep/20 $129389 $192605 $154207 Sep/21 $187367 $250396 $223644 Sep/22 $152120 $211654 $176438 Sep/23 $168077 $257408 $196348 Sep/24 $214554 $350980 $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 Tax-Managed Small/Mid Cap Fund, Class Y Shares 27.65% 9.47% 7.93% S&P 500 ® ) Footnote Reference 36.35% 15.98% 13.38% 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 | $ 887,533,000 |
Holdings Count | Holding | 646 |
Advisory Fees Paid, Amount | $ 4,767 |
InvestmentCompanyPortfolioTurnover | 57% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $887,533 646 $4,767 57% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Rights 0.0% Derivative Contracts (Net) 0.0% Utilities 1.0% Cash Equivalent 1.1% Communication Services 2.2% Energy 3.9% Real Estate 4.0% Consumer Staples 5.0% Materials 6.1% Consumer Discretionary 10.3% Health Care 10.9% Information Technology 13.6% Industrials 20.4% Financials 21.4% 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 Footnote Reference Jackson Financial Inc, Cl A 1.7% Columbia Banking System Inc 1.2% CNO Financial Group Inc 1.2% Commercial Metals Co, Cl A 1.1% Modine Manufacturing Co 1.0% Pilgrim's Pride Corp 1.0% Lincoln National Corp 1.0% Axon Enterprise Inc 0.8% Highwoods Properties Inc 0.8% Delek US Holdings Inc 0.8% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes During the reporting period, Rice Hall and Cardinal were removed as Fund managers, while Geneva was added. In addition, the QIM team was added to directly manage a sleeve of the Fund. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports or upon request at 1-800-DIAL-SEI. |
C000018199 | |
Shareholder Report [Line Items] | |
Fund Name | Mid-Cap Fund |
Class Name | Class F |
Trading Symbol | SEMCX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the Mid-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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Mid-Cap Fund, Class F Shares $112 0.98% |
Expenses Paid, Amount | $ 112 |
Expense Ratio, Percent | 0.98% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares modestly underperformed its benchmark, the Russell Midcap Index, for the 12-month period ending September 30, 2024. Regarding the Fund’s sub-advisors, Los Angeles Capital Management LLC (LA Capital) outperformed the benchmark Russell Midcap Index over the reporting period. The trend-following manager’s performance benefited from positive results for the momentum factor and stock selection in the industrials, consumer discretionary, and energy sectors. LA Capital’s performance also was bolstered by sector positioning, namely underweight allocations to consumer staples and materials, and an overweight to financials. Leeward Investments, LLC underperformed the benchmark for the period, attributable largely to value and quality style headwinds. Weak stock selection in the consumer discretionary sector also detracted from the manager’s performance. On a sector basis, Fund performance was enhanced by an overweight position in financials and underweight in materials. This was partially offset by the negative impact of a small overweight to energy. Fund performance benefited from stock selection in the industrials sector, though this was partially offset by weak selection in financials. The Fund performance generally was bolstered by positive momentum exposure over the reporting period, as this factor garnered the highest returns. A more moderate overweight to the value style had no significant impact on Fund performance, as both the cheapest and most expensive stocks in the Russell Midcap Index underperformed. The Fund’s bias towards high-quality stocks within the index detracted somewhat from performance for the reporting period, while an active underweight allocation to the most volatile stocks in the index had a modestly positive impact. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Mid-Cap Fund, Class F Shares - $243497 S&P 500 ® Russell Midcap Index (USD) - $263963 Sep/14 $100000 $100000 $100000 Sep/15 $100673 $99385 $99752 Sep/16 $114869 $114721 $113966 Sep/17 $134988 $136070 $131430 Sep/18 $153091 $160441 $149804 Sep/19 $148342 $167266 $154576 Sep/20 $144081 $192605 $161613 Sep/21 $200983 $250396 $223200 Sep/22 $169480 $211654 $179912 Sep/23 $189421 $257408 $204103 Sep/24 $243497 $350980 $263963 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Mid-Cap Fund, Class F Shares 28.55% 10.42% 9.31% S&P 500 ® 36.35% 15.98% 13.38% Russell Midcap Index (USD) 29.33% 11.30% 10.19% |
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 | $ 84,078,000 |
Holdings Count | Holding | 321 |
Advisory Fees Paid, Amount | $ 329 |
InvestmentCompanyPortfolioTurnover | 61% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $84,078 321 $329 61% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Rights 0.0% Derivative Contracts (Net) 0.0% Exchange Traded Fund 0.4% Cash Equivalent 1.5% Communication Services 2.6% Materials 3.5% Consumer Staples 3.6% Energy 4.6% Utilities 7.2% Real Estate 8.4% Health Care 10.0% Consumer Discretionary 11.1% Information Technology 11.8% Industrials 17.2% Financials 18.0% 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 Footnote Reference Howmet Aerospace Inc 1.2% Ross Stores Inc 1.0% Omnicom Group Inc 1.0% Allstate Corp/The 1.0% NetApp Inc 0.9% PulteGroup Inc 0.9% Cboe Global Markets Inc 0.8% Genpact Ltd 0.8% Public Service Enterprise Group Inc 0.8% Clean Harbors Inc 0.8% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000030067 | |
Shareholder Report [Line Items] | |
Fund Name | Mid-Cap Fund |
Class Name | Class I |
Trading Symbol | SIPIX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class I Shares of the Mid-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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Mid-Cap Fund, Class I Shares $137 1.20% |
Expenses Paid, Amount | $ 137 |
Expense Ratio, Percent | 1.20% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class I Shares modestly underperformed its benchmark, the Russell Midcap Index, for the 12-month period ending September 30, 2024. Regarding the Fund’s sub-advisors, Los Angeles Capital Management LLC (LA Capital) outperformed the benchmark Russell Midcap Index over the reporting period. The trend-following manager’s performance benefited from positive results for the momentum factor and stock selection in the industrials, consumer discretionary, and energy sectors. LA Capital’s performance also was bolstered by sector positioning, namely underweight allocations to consumer staples and materials, and an overweight to financials. Leeward Investments, LLC underperformed the benchmark for the period, attributable largely to value and quality style headwinds. Weak stock selection in the consumer discretionary sector also detracted from the manager’s performance. On a sector basis, Fund performance was enhanced by an overweight position in financials and underweight in materials. This was partially offset by the negative impact of a small overweight to energy. Fund performance benefited from stock selection in the industrials sector, though this was partially offset by weak selection in financials. The Fund performance generally was bolstered by positive momentum exposure over the reporting period, as this factor garnered the highest returns. A more moderate overweight to the value style had no significant impact on Fund performance, as both the cheapest and most expensive stocks in the Russell Midcap Index underperformed. The Fund’s bias towards high-quality stocks within the index detracted somewhat from performance for the reporting period, while an active underweight allocation to the most volatile stocks in the index had a modestly positive impact. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Mid-Cap Fund, Class I Shares - $238156 S&P 500 ® Russell Midcap Index (USD) - $263963 Sep/14 $100000 $100000 $100000 Sep/15 $100432 $99385 $99752 Sep/16 $114335 $114721 $113966 Sep/17 $134134 $136070 $131430 Sep/18 $151721 $160441 $149804 Sep/19 $146756 $167266 $154576 Sep/20 $142169 $192605 $161613 Sep/21 $197885 $250396 $223200 Sep/22 $166461 $211654 $179912 Sep/23 $185604 $257408 $204103 Sep/24 $238156 $350980 $263963 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Mid-Cap Fund, Class I Shares 28.31% 10.17% 9.07% S&P 500 ® 36.35% 15.98% 13.38% Russell Midcap Index (USD) 29.33% 11.30% 10.19% |
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 | $ 84,078,000 |
Holdings Count | Holding | 321 |
Advisory Fees Paid, Amount | $ 329 |
InvestmentCompanyPortfolioTurnover | 61% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $84,078 321 $329 61% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Rights 0.0% Derivative Contracts (Net) 0.0% Exchange Traded Fund 0.4% Cash Equivalent 1.5% Communication Services 2.6% Materials 3.5% Consumer Staples 3.6% Energy 4.6% Utilities 7.2% Real Estate 8.4% Health Care 10.0% Consumer Discretionary 11.1% Information Technology 11.8% Industrials 17.2% Financials 18.0% 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 Footnote Reference Howmet Aerospace Inc 1.2% Ross Stores Inc 1.0% Omnicom Group Inc 1.0% Allstate Corp/The 1.0% NetApp Inc 0.9% PulteGroup Inc 0.9% Cboe Global Markets Inc 0.8% Genpact Ltd 0.8% Public Service Enterprise Group Inc 0.8% Clean Harbors Inc 0.8% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000147391 | |
Shareholder Report [Line Items] | |
Fund Name | Mid-Cap Fund |
Class Name | Class Y |
Trading Symbol | SFDYX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the Mid-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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Mid-Cap Fund, Class Y Shares $84 0.73% |
Expenses Paid, Amount | $ 84 |
Expense Ratio, Percent | 0.73% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares modestly underperformed its benchmark, the Russell Midcap Index, for the 12-month period ending September 30, 2024. Regarding the Fund’s sub-advisors, Los Angeles Capital Management LLC (LA Capital) outperformed the benchmark Russell Midcap Index over the reporting period. The trend-following manager’s performance benefited from positive results for the momentum factor and stock selection in the industrials, consumer discretionary, and energy sectors. LA Capital’s performance also was bolstered by sector positioning, namely underweight allocations to consumer staples and materials, and an overweight to financials. Leeward Investments, LLC underperformed the benchmark for the period, attributable largely to value and quality style headwinds. Weak stock selection in the consumer discretionary sector also detracted from the manager’s performance. On a sector basis, Fund performance was enhanced by an overweight position in financials and underweight in materials. This was partially offset by the negative impact of a small overweight to energy. Fund performance benefited from stock selection in the industrials sector, though this was partially offset by weak selection in financials. The Fund performance generally was bolstered by positive momentum exposure over the reporting period, as this factor garnered the highest returns. A more moderate overweight to the value style had no significant impact on Fund performance, as both the cheapest and most expensive stocks in the Russell Midcap Index underperformed. The Fund’s bias towards high-quality stocks within the index detracted somewhat from performance for the reporting period, while an active underweight allocation to the most volatile stocks in the index had a modestly positive impact. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Mid-Cap Fund, Class Y Shares - $249009 S&P 500 ® Russell Midcap Index (USD) - $263963 Sep/14 $100000 $100000 $100000 Sep/15 $100673 $99385 $99752 Sep/16 $115126 $114721 $113966 Sep/17 $135664 $136070 $131430 Sep/18 $154219 $160441 $149804 Sep/19 $149820 $167266 $154576 Sep/20 $145917 $192605 $161613 Sep/21 $203999 $250396 $223200 Sep/22 $172418 $211654 $179912 Sep/23 $193174 $257408 $204103 Sep/24 $249009 $350980 $263963 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Mid-Cap Fund, Class Y Shares 28.90% 10.70% 9.55% S&P 500 ® ) Footnote Reference 36.35% 15.98% 13.38% Russell Midcap Index (USD) 29.33% 11.30% 10.19% |
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 | $ 84,078,000 |
Holdings Count | Holding | 321 |
Advisory Fees Paid, Amount | $ 329 |
InvestmentCompanyPortfolioTurnover | 61% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $84,078 321 $329 61% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Rights 0.0% Derivative Contracts (Net) 0.0% Exchange Traded Fund 0.4% Cash Equivalent 1.5% Communication Services 2.6% Materials 3.5% Consumer Staples 3.6% Energy 4.6% Utilities 7.2% Real Estate 8.4% Health Care 10.0% Consumer Discretionary 11.1% Information Technology 11.8% Industrials 17.2% Financials 18.0% 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 Footnote Reference Howmet Aerospace Inc 1.2% Ross Stores Inc 1.0% Omnicom Group Inc 1.0% Allstate Corp/The 1.0% NetApp Inc 0.9% PulteGroup Inc 0.9% Cboe Global Markets Inc 0.8% Genpact Ltd 0.8% Public Service Enterprise Group Inc 0.8% Clean Harbors Inc 0.8% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000018203 | |
Shareholder Report [Line Items] | |
Fund Name | U.S. Managed Volatility Fund |
Class Name | Class F |
Trading Symbol | SVOAX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the U.S. Managed Volatility 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 U.S. Managed Volatility Fund, Class F Shares $101 0.90% |
Expenses Paid, Amount | $ 101 |
Expense Ratio, Percent | 0.90% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares underperformed its benchmark, the Russell 3000 ™ Index, for the 12-month period ending September 30, 2024. The Fund recorded a positive absolute return for the reporting period, but underperformed the benchmark. Exposure to low-volatility and value stocks detracted from performance. Underweights to the mega-cap growth stocks that led the market upturn during the period, as well as defensive sector positioning, also weighed on performance. Exposure to relatively smaller-cap stocks was a common headwind among the Fund’s sub-advisors. Among the Fund’s sub-advisors, Allspring Global Investments, LLC’s performance for the reporting period was bolstered by its less pronounced tilt toward value stocks; however, tilts toward low-volatility stocks detracted from performance. An overweight to consumer staples and an underweight to information technology weighed on performance, while an underweight to consumer discretionary was a contributor. Performance was hampered by stock selection in health care, while holdings in industrials and consumer staples had a slightly positive impact. LSV Asset Management’s underperformance for the period was attributable largely to the manager’s tilt toward value stocks within the low-volatility segment of the market. An overweight to consumer staples and an underweight to information technology detracted from performance, while an underweight to consumer discretionary had a positive impact. Performance also was hampered by stock selection in information technology and health care. Holdings in utilities bolstered performance. The quantitative investment management (QIM) team within SIMC outperformed the benchmark since it started to directly manage a sleeve of the Fund in June 2024. Tilts toward low-volatility and value stocks contributed slightly to performance as both asset classes performed well in the third quarter of 2024. QIM also benefited from an overweight to industrials, while an overweight to consumer staples was a detractor. The Fund employed equity index futures to provide stock-like performance to a portion of the liquidity reserve account, which contained cash available for fund withdrawals. This enhanced the Fund’s absolute return for the period. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | U.S. Managed Volatility Fund, Class F Shares - $234492 S&P 500 ® Russell 3000 ™ Index (USD) - $334317 Sep/14 $100000 $100000 $100000 Sep/15 $104612 $99385 $99505 Sep/16 $117177 $114721 $114395 Sep/17 $131067 $136070 $135795 Sep/18 $146577 $160441 $159667 Sep/19 $158142 $167266 $164326 Sep/20 $150445 $192605 $188977 Sep/21 $181122 $250396 $249214 Sep/22 $170289 $211654 $205284 Sep/23 $187712 $257408 $247288 Sep/24 $234492 $350980 $334317 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years U.S. Managed Volatility Fund, Class F Shares 24.92% 8.20% 8.90% S&P 500 ® 36.35% 15.98% 13.38% Russell 3000 ™ Index (USD) 35.19% 15.26% 12.83% |
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 | $ 648,141,000 |
Holdings Count | Holding | 365 |
Advisory Fees Paid, Amount | $ 2,577 |
InvestmentCompanyPortfolioTurnover | 54% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $648,141 365 $2,577 54% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Affiliated Partnership 0.0% Derivative Contracts (Net) 0.0% Real Estate 0.1% Cash Equivalent 1.3% Materials 2.4% Energy 2.7% Utilities 3.6% Consumer Discretionary 8.5% Communication Services 8.5% Financials 11.9% Industrials 13.6% Information Technology 15.0% Health Care 16.1% Consumer Staples 16.2% 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 Footnote Reference Verizon Communications Inc 1.8% Amdocs Ltd 1.8% AT&T Inc 1.7% Cisco Systems Inc 1.7% Gilead Sciences Inc 1.6% Comcast Corp, Cl A 1.6% Lockheed Martin Corp 1.6% International Business Machines Corp 1.6% Merck & Co Inc 1.4% Bank of New York Mellon Corp/The 1.4% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes The QIM team was added to directly manage a portion of the Fund’s assets in June 2024. In addition, the advisory fee was reduced during the reporting period. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports or upon request at 1-800-DIAL-SEI. |
C000036885 | |
Shareholder Report [Line Items] | |
Fund Name | U.S. Managed Volatility Fund |
Class Name | Class I |
Trading Symbol | SEVIX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class I Shares of the U.S. Managed Volatility 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 U.S. Managed Volatility Fund, Class I Shares $129 1.15% |
Expenses Paid, Amount | $ 129 |
Expense Ratio, Percent | 1.15% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class I Shares underperformed its benchmark, the Russell 3000 ™ Index, for the 12-month period ending September 30, 2024. The Fund recorded a positive absolute return for the reporting period, but underperformed the benchmark. Exposure to low-volatility and value stocks detracted from performance. Underweights to the mega-cap growth stocks that led the market upturn during the period, as well as defensive sector positioning, also weighed on performance. Exposure to relatively smaller-cap stocks was a common headwind among the Fund’s sub-advisors. Among the Fund’s sub-advisors, Allspring Global Investments, LLC’s performance for the reporting period was bolstered by its less pronounced tilt toward value stocks; however, tilts toward low-volatility stocks detracted from performance. An overweight to consumer staples and an underweight to information technology weighed on performance, while an underweight to consumer discretionary was a contributor. Performance was hampered by stock selection in health care, while holdings in industrials and consumer staples had a slightly positive impact. LSV Asset Management’s underperformance for the period was attributable largely to the manager’s tilt toward value stocks within the low-volatility segment of the market. An overweight to consumer staples and an underweight to information technology detracted from performance, while an underweight to consumer discretionary had a positive impact. Performance also was hampered by stock selection in information technology and health care. Holdings in utilities bolstered performance. The quantitative investment management (QIM) team within SIMC outperformed the benchmark since it started to directly manage a sleeve of the Fund in June 2024. Tilts toward low-volatility and value stocks contributed slightly to performance as both asset classes performed well in the third quarter of 2024. QIM also benefited from an overweight to industrials, while an overweight to consumer staples was a detractor. The Fund employed equity index futures to provide stock-like performance to a portion of the liquidity reserve account, which contained cash available for fund withdrawals. This enhanced the Fund’s absolute return for the period. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | U.S. Managed Volatility Fund, Class I Shares - $228735 S&P 500 ® Russell 3000 ™ Index (USD) - $334317 Sep/14 $100000 $100000 $100000 Sep/15 $104425 $99385 $99505 Sep/16 $116706 $114721 $114395 Sep/17 $130215 $136070 $135795 Sep/18 $145257 $160441 $159667 Sep/19 $156324 $167266 $164326 Sep/20 $148248 $192605 $188977 Sep/21 $178146 $250396 $249214 Sep/22 $167000 $211654 $205284 Sep/23 $183512 $257408 $247288 Sep/24 $228735 $350980 $334317 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years U.S. Managed Volatility Fund, Class I Shares 24.64% 7.91% 8.63% S&P 500 ® 36.35% 15.98% 13.38% Russell 3000 ™ Index (USD) 35.19% 15.26% 12.83% |
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 | $ 648,141,000 |
Holdings Count | Holding | 365 |
Advisory Fees Paid, Amount | $ 2,577 |
InvestmentCompanyPortfolioTurnover | 54% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $648,141 365 $2,577 54% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Affiliated Partnership 0.0% Derivative Contracts (Net) 0.0% Real Estate 0.1% Cash Equivalent 1.3% Materials 2.4% Energy 2.7% Utilities 3.6% Consumer Discretionary 8.5% Communication Services 8.5% Financials 11.9% Industrials 13.6% Information Technology 15.0% Health Care 16.1% Consumer Staples 16.2% 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 Footnote Reference Verizon Communications Inc 1.8% Amdocs Ltd 1.8% AT&T Inc 1.7% Cisco Systems Inc 1.7% Gilead Sciences Inc 1.6% Comcast Corp, Cl A 1.6% Lockheed Martin Corp 1.6% International Business Machines Corp 1.6% Merck & Co Inc 1.4% Bank of New York Mellon Corp/The 1.4% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes The QIM team was added to directly manage a portion of the Fund’s assets in June 2024. In addition, the advisory fee was reduced during the reporting period. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports or upon request at 1-800-DIAL-SEI. |
C000147394 | |
Shareholder Report [Line Items] | |
Fund Name | U.S. Managed Volatility Fund |
Class Name | Class Y |
Trading Symbol | SUSYX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the U.S. Managed Volatility 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 U.S. Managed Volatility Fund, Class Y Shares $73 0.65% |
Expenses Paid, Amount | $ 73 |
Expense Ratio, Percent | 0.65% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares underperformed its benchmark, the Russell 3000 ™ Index, for the 12-month period ending September 30, 2024. The Fund recorded a positive absolute return for the reporting period, but underperformed the benchmark. Exposure to low-volatility and value stocks detracted from performance. Underweights to the mega-cap growth stocks that led the market upturn during the period, as well as defensive sector positioning, also weighed on performance. Exposure to relatively smaller-cap stocks was a common headwind among the Fund’s sub-advisors. Among the Fund’s sub-advisors, Allspring Global Investments, LLC’s performance for the reporting period was bolstered by its less pronounced tilt toward value stocks; however, tilts toward low-volatility stocks detracted from performance. An overweight to consumer staples and an underweight to information technology weighed on performance, while an underweight to consumer discretionary was a contributor. Performance was hampered by stock selection in health care, while holdings in industrials and consumer staples had a slightly positive impact. LSV Asset Management’s underperformance for the period was attributable largely to the manager’s tilt toward value stocks within the low-volatility segment of the market. An overweight to consumer staples and an underweight to information technology detracted from performance, while an underweight to consumer discretionary had a positive impact. Performance also was hampered by stock selection in information technology and health care. Holdings in utilities bolstered performance. The quantitative investment management (QIM) team within SIMC outperformed the benchmark since it started to directly manage a sleeve of the Fund in June 2024. Tilts toward low-volatility and value stocks contributed slightly to performance as both asset classes performed well in the third quarter of 2024. QIM also benefited from an overweight to industrials, while an overweight to consumer staples was a detractor. The Fund employed equity index futures to provide stock-like performance to a portion of the liquidity reserve account, which contained cash available for fund withdrawals. This enhanced the Fund’s absolute return for the period. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | U.S. Managed Volatility Fund, Class Y Shares - $240172 S&P 500 ® Russell 3000 ™ Index (USD) - $334317 Sep/14 $100000 $100000 $100000 Sep/15 $104809 $99385 $99505 Sep/16 $117681 $114721 $114395 Sep/17 $131957 $136070 $135795 Sep/18 $147937 $160441 $159667 Sep/19 $160002 $167266 $164326 Sep/20 $152614 $192605 $188977 Sep/21 $184181 $250396 $249214 Sep/22 $173625 $211654 $205284 Sep/23 $191752 $257408 $247288 Sep/24 $240172 $350980 $334317 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years U.S. Managed Volatility Fund, Class Y Shares 25.25% 8.46% 9.16% S&P 500 ® ) Footnote Reference 36.35% 15.98% 13.38% Russell 3000 ™ Index (USD) 35.19% 15.26% 12.83% |
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 | $ 648,141,000 |
Holdings Count | Holding | 365 |
Advisory Fees Paid, Amount | $ 2,577 |
InvestmentCompanyPortfolioTurnover | 54% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $648,141 365 $2,577 54% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Affiliated Partnership 0.0% Derivative Contracts (Net) 0.0% Real Estate 0.1% Cash Equivalent 1.3% Materials 2.4% Energy 2.7% Utilities 3.6% Consumer Discretionary 8.5% Communication Services 8.5% Financials 11.9% Industrials 13.6% Information Technology 15.0% Health Care 16.1% Consumer Staples 16.2% 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 Footnote Reference Verizon Communications Inc 1.8% Amdocs Ltd 1.8% AT&T Inc 1.7% Cisco Systems Inc 1.7% Gilead Sciences Inc 1.6% Comcast Corp, Cl A 1.6% Lockheed Martin Corp 1.6% International Business Machines Corp 1.6% Merck & Co Inc 1.4% Bank of New York Mellon Corp/The 1.4% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes The QIM team was added to directly manage a portion of the Fund’s assets in June 2024. In addition, the advisory fee was reduced during the reporting period. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports or upon request at 1-800-DIAL-SEI. |
C000030063 | |
Shareholder Report [Line Items] | |
Fund Name | Global Managed Volatility Fund |
Class Name | Class F |
Trading Symbol | SVTAX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the Global Managed Volatility 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Global Managed Volatility Fund, Class F Shares $123 1.11% |
Expenses Paid, Amount | $ 123 |
Expense Ratio, Percent | 1.11% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares underperformed its benchmark, the MSCI World Index (Net), for the 12-month period ending September 30, 2024. The Fund recorded a positive absolute return for the reporting period, but underperformed the benchmark. The Fund’s exposure to low-volatility stocks and value stocks detracted from performance. Underweight allocations to the mega-cap growth stocks that led the market upturn over the period, as well as defensive sector positioning, also weighed on Fund performance. Exposure to relatively smaller-cap stocks was a common headwind among the Fund’s sub-advisors. Acadian Asset Management LLC’s (Acadian) performance benefited from its multi-factor model which dampened some headwinds over the reporting period. Acadian’s overweight allocation to the consumer staples sector and underweights to financials and information technology detracted from its performance, while underweights to energy and consumer discretionary bolstered performance. Allspring Global Investments, LLC (Allspring) underperformed the benchmark largely due to its greater emphasis on defensive sector positioning and tilts toward low-volatility and value stocks. Overweights to consumer staples and health care, and an underweight to information technology, also detracted from performance. Allspring benefited from underweights to energy and consumer discretionary, and an overweight to communication services. The quantitative investment management (QIM) team within SIMC performed in line with the benchmark since it started to directly manage a sleeve of the Fund in February 2024. Tilts toward low-volatility and value stocks slightly detracted from performance as both asset classes performed well in the third quarter of 2024. QIM benefited from an underweight to consumer discretionary and an overweight to utilities, and stock selection in consumer staples. An underweight to financials and stock selection in communication services hampered performance. The Fund employed equity index futures to provide stock-like performance to a portion of the liquidity reserve account, which contained cash available for fund withdrawals. This enhanced the Fund’s absolute return for the period. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Global Managed Volatility Fund, Class F Shares - $205597 MSCI ACWI ex-USA Index (Net) (USD)* - $166302 MSCI World Index (Net) (USD) - $261136 Sep/14 $100000 $100000 $100000 Sep/15 $105869 $87837 $94909 Sep/16 $119715 $95968 $105688 Sep/17 $133077 $114787 $124887 Sep/18 $143884 $116810 $138921 Sep/19 $150721 $115375 $141460 Sep/20 $144199 $118838 $156182 Sep/21 $164969 $147259 $201195 Sep/22 $149816 $110199 $161695 Sep/23 $168145 $132667 $197193 Sep/24 $205597 $166302 $261136 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Global Managed Volatility Fund, Class F Shares 22.27% 6.41% 7.47% MSCI ACWI ex-USA Index (Net) (USD)* 25.35% 7.59% 5.22% MSCI World Index (Net) (USD) 32.43% 13.04% 10.07% |
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 | $ 845,086,000 |
Holdings Count | Holding | 479 |
Advisory Fees Paid, Amount | $ 4,420 |
InvestmentCompanyPortfolioTurnover | 85% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $845,086 479 $4,420 85% |
Holdings [Text Block] | Country Weightings Footnote Reference Value Value Derivative Contracts (Net) -0.1% Other Countries 3.7% Germany 1.1% Norway 1.2% Sweden 1.4% Israel 1.8% Canada 2.0% France 2.6% Hong Kong 2.7% Netherlands 2.7% Switzerland 4.2% United Kingdom 5.1% Japan 10.5% United States 60.1% 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 Footnote Reference Kimberly-Clark Corp 1.7% AT&T Inc 1.7% Johnson & Johnson 1.6% Electronic Arts Inc 1.5% Walmart Inc 1.3% Check Point Software Technologies Ltd 1.3% Koninklijke Ahold Delhaize NV 1.3% Novartis AG 1.3% Motorola Solutions Inc 1.3% Lockheed Martin Corp 1.3% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes The QIM team was added to directly manage a portion of the Fund’s assets during the reporting period. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports or upon request at 1-800-DIAL-SEI. |
C000036887 | |
Shareholder Report [Line Items] | |
Fund Name | Global Managed Volatility Fund |
Class Name | Class I |
Trading Symbol | SGMIX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class I Shares of the Global Managed Volatility 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Global Managed Volatility Fund, Class I Shares $152 1.37% |
Expenses Paid, Amount | $ 152 |
Expense Ratio, Percent | 1.37% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class I Shares underperformed its benchmark, the MSCI World Index (Net), for the 12-month period ending September 30, 2024. The Fund recorded a positive absolute return for the reporting period, but underperformed the benchmark. The Fund’s exposure to low-volatility stocks and value stocks detracted from performance. Underweight allocations to the mega-cap growth stocks that led the market upturn over the period, as well as defensive sector positioning, also weighed on Fund performance. Exposure to relatively smaller-cap stocks was a common headwind among the Fund’s sub-advisors. Acadian Asset Management LLC’s (Acadian) performance benefited from its multi-factor model which dampened some headwinds over the reporting period. Acadian’s overweight allocation to the consumer staples sector and underweights to financials and information technology detracted from its performance, while underweights to energy and consumer discretionary bolstered performance. Allspring Global Investments, LLC (Allspring) underperformed the benchmark largely due to its greater emphasis on defensive sector positioning and tilts toward low-volatility and value stocks. Overweights to consumer staples and health care, and an underweight to information technology, also detracted from performance. Allspring benefited from underweights to energy and consumer discretionary, and an overweight to communication services. The quantitative investment management (QIM) team within SIMC performed in line with the benchmark since it started to directly manage a sleeve of the Fund in February 2024. Tilts toward low-volatility and value stocks slightly detracted from performance as both asset classes performed well in the third quarter of 2024. QIM benefited from an underweight to consumer discretionary and an overweight to utilities, and stock selection in consumer staples. An underweight to financials and stock selection in communication services hampered performance. The Fund employed equity index futures to provide stock-like performance to a portion of the liquidity reserve account, which contained cash available for fund withdrawals. This enhanced the Fund’s absolute return for the period. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Global Managed Volatility Fund, Class I Shares - $200353 MSCI ACWI ex-USA Index (Net) (USD)* - $166302 MSCI World Index (Net) (USD) - $261136 Sep/14 $100000 $100000 $100000 Sep/15 $105428 $87837 $94909 Sep/16 $119106 $95968 $105688 Sep/17 $131965 $114787 $124887 Sep/18 $142356 $116810 $138921 Sep/19 $148696 $115375 $141460 Sep/20 $141983 $118838 $156182 Sep/21 $161870 $147259 $201195 Sep/22 $146710 $110199 $161695 Sep/23 $164413 $132667 $197193 Sep/24 $200353 $166302 $261136 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Global Managed Volatility Fund, Class I Shares 21.86% 6.14% 7.20% MSCI ACWI ex-USA Index (Net) (USD)* 25.35% 7.59% 5.22% MSCI World Index (Net) (USD) 32.43% 13.04% 10.07% |
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 | $ 845,086,000 |
Holdings Count | Holding | 479 |
Advisory Fees Paid, Amount | $ 4,420 |
InvestmentCompanyPortfolioTurnover | 85% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $845,086 479 $4,420 85% |
Holdings [Text Block] | Country Weightings Footnote Reference Value Value Derivative Contracts (Net) -0.1% Other Countries 3.7% Germany 1.1% Norway 1.2% Sweden 1.4% Israel 1.8% Canada 2.0% France 2.6% Hong Kong 2.7% Netherlands 2.7% Switzerland 4.2% United Kingdom 5.1% Japan 10.5% United States 60.1% 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 Footnote Reference Kimberly-Clark Corp 1.7% AT&T Inc 1.7% Johnson & Johnson 1.6% Electronic Arts Inc 1.5% Walmart Inc 1.3% Check Point Software Technologies Ltd 1.3% Koninklijke Ahold Delhaize NV 1.3% Novartis AG 1.3% Motorola Solutions Inc 1.3% Lockheed Martin Corp 1.3% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes The QIM team was added to directly manage a portion of the Fund’s assets during the reporting period. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports or upon request at 1-800-DIAL-SEI. |
C000147396 | |
Shareholder Report [Line Items] | |
Fund Name | Global Managed Volatility Fund |
Class Name | Class Y |
Trading Symbol | SGLYX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the Global Managed Volatility 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Global Managed Volatility Fund, Class Y Shares $96 0.86% |
Expenses Paid, Amount | $ 96 |
Expense Ratio, Percent | 0.86% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares underperformed its benchmark, the MSCI World Index (Net), for the 12-month period ending September 30, 2024. The Fund recorded a positive absolute return for the reporting period, but underperformed the benchmark. The Fund’s exposure to low-volatility stocks and value stocks detracted from performance. Underweight allocations to the mega-cap growth stocks that led the market upturn over the period, as well as defensive sector positioning, also weighed on Fund performance. Exposure to relatively smaller-cap stocks was a common headwind among the Fund’s sub-advisors. Acadian Asset Management LLC’s (Acadian) performance benefited from its multi-factor model which dampened some headwinds over the reporting period. Acadian’s overweight allocation to the consumer staples sector and underweights to financials and information technology detracted from its performance, while underweights to energy and consumer discretionary bolstered performance. Allspring Global Investments, LLC (Allspring) underperformed the benchmark largely due to its greater emphasis on defensive sector positioning and tilts toward low-volatility and value stocks. Overweights to consumer staples and health care, and an underweight to information technology, also detracted from performance. Allspring benefited from underweights to energy and consumer discretionary, and an overweight to communication services. The quantitative investment management (QIM) team within SIMC performed in line with the benchmark since it started to directly manage a sleeve of the Fund in February 2024. Tilts toward low-volatility and value stocks slightly detracted from performance as both asset classes performed well in the third quarter of 2024. QIM benefited from an underweight to consumer discretionary and an overweight to utilities, and stock selection in consumer staples. An underweight to financials and stock selection in communication services hampered performance. The Fund employed equity index futures to provide stock-like performance to a portion of the liquidity reserve account, which contained cash available for fund withdrawals. This enhanced the Fund’s absolute return for the period. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Global Managed Volatility Fund, Class Y Shares - $210732 MSCI ACWI ex-USA Index (Net) (USD)* - $166302 MSCI World Index (Net) (USD) - $261136 Sep/14 $100000 $100000 $100000 Sep/15 $106065 $87837 $94909 Sep/16 $120371 $95968 $105688 Sep/17 $133996 $114787 $124887 Sep/18 $145332 $116810 $138921 Sep/19 $152527 $115375 $141460 Sep/20 $146311 $118838 $156182 Sep/21 $167752 $147259 $201195 Sep/22 $152740 $110199 $161695 Sep/23 $172011 $132667 $197193 Sep/24 $210732 $166302 $261136 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Global Managed Volatility Fund, Class Y Shares 22.51% 6.68% 7.74% MSCI ACWI ex-USA Index (Net) (USD ) Footnote Reference 25.35% 7.59% 5.22% MSCI World Index (Net) (USD) 32.43% 13.04% 10.07% |
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 | $ 845,086,000 |
Holdings Count | Holding | 479 |
Advisory Fees Paid, Amount | $ 4,420 |
InvestmentCompanyPortfolioTurnover | 85% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $845,086 479 $4,420 85% |
Holdings [Text Block] | Country Weightings Footnote Reference Value Value Derivative Contracts (Net) -0.1% Other Countries 3.7% Germany 1.1% Norway 1.2% Sweden 1.4% Israel 1.8% Canada 2.0% France 2.6% Hong Kong 2.7% Netherlands 2.7% Switzerland 4.2% United Kingdom 5.1% Japan 10.5% United States 60.1% 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 Footnote Reference Kimberly-Clark Corp 1.7% AT&T Inc 1.7% Johnson & Johnson 1.6% Electronic Arts Inc 1.5% Walmart Inc 1.3% Check Point Software Technologies Ltd 1.3% Koninklijke Ahold Delhaize NV 1.3% Novartis AG 1.3% Motorola Solutions Inc 1.3% Lockheed Martin Corp 1.3% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes The QIM team was added to directly manage a portion of the Fund’s assets during the reporting period. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports or upon request at 1-800-DIAL-SEI. |
C000047774 | |
Shareholder Report [Line Items] | |
Fund Name | Tax-Managed Managed Volatility Fund |
Class Name | Class F |
Trading Symbol | TMMAX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the Tax-Managed Managed Volatility 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Tax-Managed Managed Volatility Fund, Class F Shares $115 1.00% |
Expenses Paid, Amount | $ 115 |
Expense Ratio, Percent | 1% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares underperformed its benchmark, the Russell 3000 TM The Fund’s exposure to low-volatility and value stocks detracted from performance for the reporting period. Underweights to the mega-cap growth stocks that led the market upturn during the period, as well as defensive sector positioning, also weighed on performance. Exposure to relatively smaller-cap stocks was a common headwind among the Fund’s sub-advisors. Among the Fund’s sub-advisors, LSV Asset Management outperformed the benchmark due to select holdings among the strong-performing “Magnificent Seven” mega-cap tech stocks. The strategy’s tilt toward value stocks within the low-volatility segment of the market weighed on performance. An overweight to consumer staples also was a detractor, while an underweight to consumer discretionary had a positive impact. Performance was hampered by stock selection in information technology, and benefited from holdings in industrials. Allspring Global Investments, LLC underperformed over the period largely due to tilts toward low-volatility and value stocks, as well as greater emphasis on defensive sector positioning. An overweight to consumer staples and an underweight to information technology detracted from performance. Underweights to consumer discretionary and energy enhanced performance. Stock selection in health care and information technology weighed on performance, while holdings in energy had a positive impact. The quantitative investment management (QIM) team within SIMC outperformed the benchmark since it started to directly manage a sleeve of the Fund in July 2024. Tilts toward low-volatility and value stocks contributed slightly to performance as both asset classes performed well in the third quarter of 2024. QIM benefited from an underweight to and stock selection in information technology, while stock selection in health care was a detractor. The Fund employed equity index futures to provide stock-like performance to a portion of the liquidity reserve account, which contained cash available for fund withdrawals. This enhanced the Fund’s absolute return for the period. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Tax-Managed Managed Volatility Fund, Class F Shares - $268476 S&P 500 ® Russell 3000 ™ Index (USD) - $334317 Sep/14 $100000 $100000 $100000 Sep/15 $105916 $99385 $99505 Sep/16 $118879 $114721 $114395 Sep/17 $134138 $136070 $135795 Sep/18 $150582 $160441 $159667 Sep/19 $161360 $167266 $164326 Sep/20 $158887 $192605 $188977 Sep/21 $191873 $250396 $249214 Sep/22 $187123 $211654 $205284 Sep/23 $207672 $257408 $247288 Sep/24 $268476 $350980 $334317 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Tax-Managed Managed Volatility Fund, Class F Shares 29.28% 10.72% 10.38% S&P 500 ® 36.35% 15.98% 13.38% Russell 3000 ™ Index (USD) 35.19% 15.26% 12.83% |
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 | $ 846,039,000 |
Holdings Count | Holding | 131 |
Advisory Fees Paid, Amount | $ 3,516 |
InvestmentCompanyPortfolioTurnover | 24% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $846,039 131 $3,516 24% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value 0.0% Derivative Contracts (Net) 0.0% Real Estate 0.3% Energy 1.6% Cash Equivalent 1.7% Materials 2.0% Utilities 4.1% Consumer Discretionary 5.7% Communication Services 6.7% Industrials 14.4% Financials 14.5% Consumer Staples 15.6% Health Care 16.1% Information Technology 17.3% 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 Footnote Reference Progressive Corp/The 3.7% Apple Inc 3.1% Microsoft Corp 3.1% Motorola Solutions Inc 2.9% Elevance Health Inc 2.5% Republic Services Inc 2.5% UnitedHealth Group Inc 2.3% Oracle Corp, Cl B 2.2% Eli Lilly & Co 2.1% Synopsys Inc 2.0% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes The QIM team was added to directly manage a portion of the Fund’s assets in July 2024. In addition, the advisory fee was reduced during the reporting period. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
C000147398 | |
Shareholder Report [Line Items] | |
Fund Name | Tax-Managed Managed Volatility Fund |
Class Name | Class Y |
Trading Symbol | STVYX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the Tax-Managed Managed Volatility 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Tax-Managed Managed Volatility Fund, Class Y Shares $86 0.75% |
Expenses Paid, Amount | $ 86 |
Expense Ratio, Percent | 0.75% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares underperformed its benchmark, the Russell 3000 TM The Fund’s exposure to low-volatility and value stocks detracted from performance for the reporting period. Underweights to the mega-cap growth stocks that led the market upturn during the period, as well as defensive sector positioning, also weighed on performance. Exposure to relatively smaller-cap stocks was a common headwind among the Fund’s sub-advisors. Among the Fund’s sub-advisors, LSV Asset Management outperformed the benchmark due to select holdings among the strong-performing “Magnificent Seven” mega-cap tech stocks. The strategy’s tilt toward value stocks within the low-volatility segment of the market weighed on performance. An overweight to consumer staples also was a detractor, while an underweight to consumer discretionary had a positive impact. Performance was hampered by stock selection in information technology, and benefited from holdings in industrials. Allspring Global Investments, LLC underperformed over the period largely due to tilts toward low-volatility and value stocks, as well as greater emphasis on defensive sector positioning. An overweight to consumer staples and an underweight to information technology detracted from performance. Underweights to consumer discretionary and energy enhanced performance. Stock selection in health care and information technology weighed on performance, while holdings in energy had a positive impact. The quantitative investment management (QIM) team within SIMC outperformed the benchmark since it started to directly manage a sleeve of the Fund in July 2024. Tilts toward low-volatility and value stocks contributed slightly to performance as both asset classes performed well in the third quarter of 2024. QIM benefited from an underweight to and stock selection in information technology, while stock selection in health care was a detractor. The Fund employed equity index futures to provide stock-like performance to a portion of the liquidity reserve account, which contained cash available for fund withdrawals. This enhanced the Fund’s absolute return for the period. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Tax-Managed Managed Volatility Fund, Class Y Shares - $274756 S&P 500 ® Russell 3000 ™ Index (USD) - $334317 Sep/14 $100000 $100000 $100000 Sep/15 $106062 $99385 $99505 Sep/16 $119239 $114721 $114395 Sep/17 $134885 $136070 $135795 Sep/18 $151883 $160441 $159667 Sep/19 $163160 $167266 $164326 Sep/20 $160981 $192605 $188977 Sep/21 $194976 $250396 $249214 Sep/22 $190531 $211654 $205284 Sep/23 $211989 $257408 $247288 Sep/24 $274756 $350980 $334317 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Tax-Managed Managed Volatility Fund, Class Y Shares 29.61% 10.99% 10.64% S&P 500 ® ) Footnote Reference 36.35% 15.98% 13.38% Russell 3000 ™ Index (USD) 35.19% 15.26% 12.83% |
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 | $ 846,039,000 |
Holdings Count | Holding | 131 |
Advisory Fees Paid, Amount | $ 3,516 |
InvestmentCompanyPortfolioTurnover | 24% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $846,039 131 $3,516 24% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value 0.0% Derivative Contracts (Net) 0.0% Real Estate 0.3% Energy 1.6% Cash Equivalent 1.7% Materials 2.0% Utilities 4.1% Consumer Discretionary 5.7% Communication Services 6.7% Industrials 14.4% Financials 14.5% Consumer Staples 15.6% Health Care 16.1% Information Technology 17.3% 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 Footnote Reference Progressive Corp/The 3.7% Apple Inc 3.1% Microsoft Corp 3.1% Motorola Solutions Inc 2.9% Elevance Health Inc 2.5% Republic Services Inc 2.5% UnitedHealth Group Inc 2.3% Oracle Corp, Cl B 2.2% Eli Lilly & Co 2.1% Synopsys Inc 2.0% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes The QIM team was added to directly manage a portion of the Fund’s assets in July 2024. In addition, the advisory fee was reduced during the reporting period. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
C000171910 | |
Shareholder Report [Line Items] | |
Fund Name | Tax-Managed International Managed Volatility Fund |
Class Name | Class F |
Trading Symbol | SMINX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the Tax-Managed International Managed Volatility 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Tax-Managed International Managed Volatility Fund, Class F Shares $123 1.11% |
Expenses Paid, Amount | $ 123 |
Expense Ratio, Percent | 1.11% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares underperformed its benchmark, the MSCI EAFE Index, for the 12-month period ending September 30, 2024. The Fund recorded a positive absolute return for the reporting period, but underperformed the benchmark. Exposure to low-volatility and value stocks detracted from performance. Underweight allocations to the mega-cap growth stocks that led the market upturn over the period, as well as defensive sector positioning, also weighed on Fund performance. Defensive sector positioning and exposure to relatively smaller-cap stocks was a common headwind among the Fund’s sub-advisors. Acadian Asset Management LLC’s performance benefited from its multi-factor model, which dampened some headwinds over the reporting period. An overweight to consumer staples and an underweight to financials, along with stock selection in communication services, detracted from performance, while underweights to energy and consumer discretionary, and stock selection in consumer staples and consumer discretionary, had a positive impact. LSV Asset Management (LSV) underperformed largely due to its tilt toward low volatility and value stocks. An overweight to consumer staples and energy as well as an underweight to information technology detracted from performance, though this was partially offset by underweights to financials and consumer discretionary. LSV’s performance was hampered by stock selection in industrials and health care, but benefited from holdings in consumer staples. Allspring Global Investments, LLC underperformed the benchmark largely due to its greater emphasis on defensive sector positioning and tilts toward low-volatility and value stocks. An overweight to consumer staples and stock selection in industrials also detracted from performance. Performance benefited from an underweight to energy and stock selection in consumer staples. The Fund employed equity index futures to provide stock-like performance to a portion of the liquidity reserve account, which contained cash available for fund withdrawals. This enhanced the Fund’s absolute return for the period. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Tax-Managed International Managed Volatility Fund, Class F Shares - $145299 MSCI ACWI ex-USA Index (Net) (USD)* - $175816 MSCI EAFE Index (Net) (USD) - $183827 Oct/16 $100000 $100000 $100000 Sep/17 $115647 $121355 $122295 Sep/18 $116724 $123493 $125642 Sep/19 $113504 $121976 $123959 Sep/20 $110007 $125637 $124572 Sep/21 $124565 $155684 $156625 Sep/22 $98811 $116504 $117264 Sep/23 $119406 $140257 $147338 Sep/24 $145299 $175816 $183827 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years Annualized Since Inception Tax-Managed International Managed Volatility Fund, Class F Shares 21.68% 5.06% 4.81% MSCI ACWI ex-USA Index (Net) (USD)* 25.35% 7.59% 7.44% MSCI EAFE Index (Net) (USD) 24.77% 8.20% 7.95% |
Performance Inception Date | Oct. 17, 2016 |
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 | $ 306,517,000 |
Holdings Count | Holding | 423 |
Advisory Fees Paid, Amount | $ 1,241 |
InvestmentCompanyPortfolioTurnover | 59% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $306,517 423 $1,241 59% |
Holdings [Text Block] | Country Weightings Footnote Reference Value Value Derivative Contracts (Net) 0.0% Other Countries 12.4% Canada 2.4% Denmark 2.8% Sweden 2.9% Netherlands 3.6% Singapore 3.6% Hong Kong 3.6% Australia 5.4% Germany 5.9% France 8.4% Switzerland 9.1% United Kingdom 13.9% Japan 24.1% 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 Footnote Reference Novartis AG 1.8% Koninklijke Ahold Delhaize NV 1.7% GSK PLC 1.3% Tesco PLC 1.3% Deutsche Telekom AG 1.2% BAE Systems PLC 1.2% Orange SA 1.2% Sanofi SA 1.1% Imperial Brands PLC 1.1% Henkel AG & Co KGaA 0.9% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes The administration fee was reduced during the reporting period. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports or upon request at 1-800-DIAL-SEI. |
C000171911 | |
Shareholder Report [Line Items] | |
Fund Name | Tax-Managed International Managed Volatility Fund |
Class Name | Class Y |
Trading Symbol | SIMYX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the Tax-Managed International Managed Volatility 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Tax-Managed International Managed Volatility Fund, Class Y Shares $95 0.86% |
Expenses Paid, Amount | $ 95 |
Expense Ratio, Percent | 0.86% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares underperformed its benchmark, the MSCI EAFE Index, for the 12-month period ending September 30, 2024. The Fund recorded a positive absolute return for the reporting period, but underperformed the benchmark. Exposure to low-volatility and value stocks detracted from performance. Underweight allocations to the mega-cap growth stocks that led the market upturn over the period, as well as defensive sector positioning, also weighed on Fund performance. Defensive sector positioning and exposure to relatively smaller-cap stocks was a common headwind among the Fund’s sub-advisors. Acadian Asset Management LLC’s performance benefited from its multi-factor model, which dampened some headwinds over the reporting period. An overweight to consumer staples and an underweight to financials, along with stock selection in communication services, detracted from performance, while underweights to energy and consumer discretionary, and stock selection in consumer staples and consumer discretionary, had a positive impact. LSV Asset Management (LSV) underperformed largely due to its tilt toward low volatility and value stocks. An overweight to consumer staples and energy as well as an underweight to information technology detracted from performance, though this was partially offset by underweights to financials and consumer discretionary. LSV’s performance was hampered by stock selection in industrials and health care, but benefited from holdings in consumer staples. Allspring Global Investments, LLC underperformed the benchmark largely due to its greater emphasis on defensive sector positioning and tilts toward low-volatility and value stocks. An overweight to consumer staples and stock selection in industrials also detracted from performance. Performance benefited from an underweight to energy and stock selection in consumer staples. The Fund employed equity index futures to provide stock-like performance to a portion of the liquidity reserve account, which contained cash available for fund withdrawals. This enhanced the Fund’s absolute return for the period. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Tax-Managed International Managed Volatility Fund, Class Y Shares - $148083 MSCI ACWI ex-USA Index (Net) (USD)* - $175816 MSCI EAFE Index (Net) (USD) - $183827 Oct/16 $100000 $100000 $100000 Sep/17 $115904 $121355 $122295 Sep/18 $117245 $123493 $125642 Sep/19 $114350 $121976 $123959 Sep/20 $111101 $125637 $124572 Sep/21 $126076 $155684 $156625 Sep/22 $100308 $116504 $117264 Sep/23 $121392 $140257 $147338 Sep/24 $148083 $175816 $183827 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years Annualized Since Inception Tax-Managed International Managed Volatility Fund, Class Y Shares 21.99% 5.31% 5.06% MSCI ACWI ex-USA Index (Net) (USD)* 25.35% 7.59% 7.44% MSCI EAFE Index (Net) (USD) 24.77% 8.20% 7.95% |
Performance Inception Date | Oct. 17, 2016 |
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 | $ 306,517,000 |
Holdings Count | Holding | 423 |
Advisory Fees Paid, Amount | $ 1,241 |
InvestmentCompanyPortfolioTurnover | 59% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $306,517 423 $1,241 59% |
Holdings [Text Block] | Country Weightings Footnote Reference Value Value Derivative Contracts (Net) 0.0% Other Countries 12.4% Canada 2.4% Denmark 2.8% Sweden 2.9% Netherlands 3.6% Singapore 3.6% Hong Kong 3.6% Australia 5.4% Germany 5.9% France 8.4% Switzerland 9.1% United Kingdom 13.9% Japan 24.1% 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 Footnote Reference Novartis AG 1.8% Koninklijke Ahold Delhaize NV 1.7% GSK PLC 1.3% Tesco PLC 1.3% Deutsche Telekom AG 1.2% BAE Systems PLC 1.2% Orange SA 1.2% Sanofi SA 1.1% Imperial Brands PLC 1.1% Henkel AG & Co KGaA 0.9% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes The administration fee was reduced during the reporting period. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports or upon request at 1-800-DIAL-SEI. |
C000018189 | |
Shareholder Report [Line Items] | |
Fund Name | Real Estate Fund |
Class Name | Class F |
Trading Symbol | SETAX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the Real Estate 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Real Estate Fund, Class F Shares $135 1.15% |
Expenses Paid, Amount | $ 135 |
Expense Ratio, Percent | 1.15% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares outperformed its benchmark, the Wilshire U.S. Real Estate Securities Index, for the 12-month period ending September 30, 2024. Over the reporting period, the Fund’s sole sub-advisor—CenterSquare Investment Management (CenterSquare)—outperformed the benchmark for the reporting period. The manager modestly outperformed the index over the first three quarters of the reporting period, but this quickly accelerated in the third quarter of 2024, as the Federal Reserve (Fed) implemented its first rate cut since its rate-hiking regime began in March 2022, and investors diversified away from the concentrated technology sector into lower-volatility, “bond proxy” sectors of the market, including real estate. CenterSquare’s performance benefited from both positive sector allocation and security selection during the reporting period. Overweight positions in telecommunications towers, banks, and specialized real estate investment trusts (REITs), as well as an underweight to industrial REITs, also had a positive impact on performance. Security selection in health care REITs was the largest contributor to the sub-advisor’s performance for the period. At the security level, holdings in Prologis Inc., American Healthcare REIT, American Tower Corp., and Ventas Inc., were the largest contributors to CenterSquare’s performance for the period while positions in Welltower Inc., and Rexford Industrial Realty Inc., were the most notable detractors from performance. As of the end of the reporting period, CenterSquare’s portfolio was most overweight to data center REITs, and the largest underweight was in multi-family residential REITs. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Real Estate Fund, Class F Shares - $218444 S&P 500 ® Wilshire US Real Estate Securities Index (RESI) (USD) - $214326 Sep/14 $100000 $100000 $100000 Sep/15 $111436 $99385 $112006 Sep/16 $130520 $114721 $132670 Sep/17 $129773 $136070 $133734 Sep/18 $136310 $160441 $139224 Sep/19 $159964 $167266 $164665 Sep/20 $137230 $192605 $135438 Sep/21 $189943 $250396 $187023 Sep/22 $156882 $211654 $154186 Sep/23 $161110 $257408 $160477 Sep/24 $218444 $350980 $214326 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Real Estate Fund, Class F Shares 35.59% 6.43% 8.13% S&P 500 ® 36.35% 15.98% 13.38% Wilshire US Real Estate Securities Index (RESI) (USD) 33.56% 5.41% 7.92% |
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 | $ 77,938,000 |
Holdings Count | Holding | 44 |
Advisory Fees Paid, Amount | $ 404 |
InvestmentCompanyPortfolioTurnover | 46% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $77,938 44 $404 46% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Cash Equivalent 0.9% Real Estate 99.1% 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 Footnote Reference Equinix Inc 9.5% Prologis Inc 8.2% Digital Realty Trust Inc, Cl A 5.1% Welltower Inc 4.8% Extra Space Storage Inc 4.6% Ventas Inc 4.4% Simon Property Group Inc 4.2% Equity Residential 4.2% UDR Inc 3.9% Public Storage 3.7% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000036883 | |
Shareholder Report [Line Items] | |
Fund Name | Real Estate Fund |
Class Name | Class I |
Trading Symbol | SEIRX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class I Shares of the Real Estate 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Real Estate Fund, Class I Shares $161 1.37% |
Expenses Paid, Amount | $ 161 |
Expense Ratio, Percent | 1.37% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class I Shares outperformed its benchmark, the Wilshire U.S. Real Estate Securities Index, for the 12-month period ending September 30, 2024. Over the reporting period, the Fund’s sole sub-advisor—CenterSquare Investment Management (CenterSquare)—outperformed the benchmark for the reporting period. The manager modestly outperformed the index over the first three quarters of the reporting period, but this quickly accelerated in the third quarter of 2024, as the Federal Reserve (Fed) implemented its first rate cut since its rate-hiking regime began in March 2022, and investors diversified away from the concentrated technology sector into lower-volatility, “bond proxy” sectors of the market, including real estate. CenterSquare’s performance benefited from both positive sector allocation and security selection during the reporting period. Overweight positions in telecommunications towers, banks, and specialized real estate investment trusts (REITs), as well as an underweight to industrial REITs, also had a positive impact on performance. Security selection in health care REITs was the largest contributor to the sub-advisor’s performance for the period. At the security level, holdings in Prologis Inc., American Healthcare REIT, American Tower Corp., and Ventas Inc., were the largest contributors to CenterSquare’s performance for the period while positions in Welltower Inc., and Rexford Industrial Realty Inc., were the most notable detractors from performance. As of the end of the reporting period, CenterSquare’s portfolio was most overweight to data center REITs, and the largest underweight was in multi-family residential REITs. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Real Estate Fund, Class I Shares - $213677 S&P 500 ® Wilshire US Real Estate Securities Index (RESI) (USD) - $214326 Sep/14 $100000 $100000 $100000 Sep/15 $111160 $99385 $112006 Sep/16 $129951 $114721 $132670 Sep/17 $128908 $136070 $133734 Sep/18 $135093 $160441 $139224 Sep/19 $158137 $167266 $164665 Sep/20 $135392 $192605 $135438 Sep/21 $187031 $250396 $187023 Sep/22 $154234 $211654 $154186 Sep/23 $157990 $257408 $160477 Sep/24 $213677 $350980 $214326 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Real Estate Fund, Class I Shares 35.25% 6.20% 7.89% S&P 500 ® 36.35% 15.98% 13.38% Wilshire US Real Estate Securities Index (RESI) (USD) 33.56% 5.41% 7.92% |
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 | $ 77,938,000 |
Holdings Count | Holding | 44 |
Advisory Fees Paid, Amount | $ 404 |
InvestmentCompanyPortfolioTurnover | 46% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $77,938 44 $404 46% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Cash Equivalent 0.9% Real Estate 99.1% 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 Footnote Reference Equinix Inc 9.5% Prologis Inc 8.2% Digital Realty Trust Inc, Cl A 5.1% Welltower Inc 4.8% Extra Space Storage Inc 4.6% Ventas Inc 4.4% Simon Property Group Inc 4.2% Equity Residential 4.2% UDR Inc 3.9% Public Storage 3.7% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000147385 | |
Shareholder Report [Line Items] | |
Fund Name | Real Estate Fund |
Class Name | Class Y |
Trading Symbol | SREYX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the Real Estate 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Real Estate Fund, Class Y Shares $106 0.90% |
Expenses Paid, Amount | $ 106 |
Expense Ratio, Percent | 0.90% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares outperformed its benchmark, the Wilshire U.S. Real Estate Securities Index, for the 12-month period ending September 30, 2024. Over the reporting period, the Fund’s sole sub-advisor—CenterSquare Investment Management (CenterSquare)—outperformed the benchmark for the reporting period. The manager modestly outperformed the index over the first three quarters of the reporting period, but this quickly accelerated in the third quarter of 2024, as the Federal Reserve (Fed) implemented its first rate cut since its rate-hiking regime began in March 2022, and investors diversified away from the concentrated technology sector into lower-volatility, “bond proxy” sectors of the market, including real estate. CenterSquare’s performance benefited from both positive sector allocation and security selection during the reporting period. Overweight positions in telecommunications towers, banks, and specialized real estate investment trusts (REITs), as well as an underweight to industrial REITs, also had a positive impact on performance. Security selection in health care REITs was the largest contributor to the sub-advisor’s performance for the period. At the security level, holdings in Prologis Inc., American Healthcare REIT, American Tower Corp., and Ventas Inc., were the largest contributors to CenterSquare’s performance for the period while positions in Welltower Inc., and Rexford Industrial Realty Inc., were the most notable detractors from performance. As of the end of the reporting period, CenterSquare’s portfolio was most overweight to data center REITs, and the largest underweight was in multi-family residential REITs. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Real Estate Fund, Class Y Shares - $223704 S&P 500 ® Wilshire US Real Estate Securities Index (RESI) (USD) - $214326 Sep/14 $100000 $100000 $100000 Sep/15 $111577 $99385 $112006 Sep/16 $131094 $114721 $132670 Sep/17 $130613 $136070 $133734 Sep/18 $137542 $160441 $139224 Sep/19 $161815 $167266 $164665 Sep/20 $139098 $192605 $135438 Sep/21 $193083 $250396 $187023 Sep/22 $159912 $211654 $154186 Sep/23 $164617 $257408 $160477 Sep/24 $223704 $350980 $214326 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Real Estate Fund, Class Y Shares 35.89% 6.69% 8.38% S&P 500 ® ) Footnote Reference 36.35% 15.98% 13.38% Wilshire US Real Estate Securities Index (RESI) (USD) 33.56% 5.41% 7.92% |
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 | $ 77,938,000 |
Holdings Count | Holding | 44 |
Advisory Fees Paid, Amount | $ 404 |
InvestmentCompanyPortfolioTurnover | 46% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $77,938 44 $404 46% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Cash Equivalent 0.9% Real Estate 99.1% 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 Footnote Reference Equinix Inc 9.5% Prologis Inc 8.2% Digital Realty Trust Inc, Cl A 5.1% Welltower Inc 4.8% Extra Space Storage Inc 4.6% Ventas Inc 4.4% Simon Property Group Inc 4.2% Equity Residential 4.2% UDR Inc 3.9% Public Storage 3.7% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000018187 | |
Shareholder Report [Line Items] | |
Fund Name | Core Fixed Income Fund |
Class Name | Class F |
Trading Symbol | TRLVX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the Core Fixed Income 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Core Fixed Income Fund, Class F Shares $70 0.66% |
Expenses Paid, Amount | $ 70 |
Expense Ratio, Percent | 0.66% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares outperformed its benchmark, the Bloomberg US Aggregate Bond Index, for the 12-month period ending September 30, 2024. The reporting period began with the Federal Reserve (Fed) pausing after hiking short-term interest rates 11 times for a cumulative 525 basis points (5.25%) during 2022 and early 2023. Despite some bumps in the road, inflation largely moderated during the first nine months of 2024, and the Fed began its rate-cutting cycle with an aggressive 50-basis-point (0.50%) reduction at its September 2024 meeting. Spread sectors benefited from moderating inflation, the Fed pivoting to easing, and solid fundamentals for both corporations and consumers. A long duration posture contributed to the Fund’s outperformance versus the benchmark for the reporting period as yields fell across the U.S. Treasury yield curve. A steepening bias (which employs derivatives to benefit from escalating yield differences that occur as a result of increases in the yield spread between two Treasury securities of different maturities) bolstered Fund performance as short-term yields declined more sharply than long-term yields. An overweight position and security selection in the credit sector was a positive contributor to performance as corporate fundamentals remained relatively strong. An overweight allocation to agency mortgage-backed securities (MBS) also enhanced Fund performance for the period. Additionally, Fund performance was bolstered by both security selection and positioning within high-quality prime credit cards and auto asset-backed securities (ABS), as well as an allocation to AAA rated collateralized loan obligations (CLOs). Among the Fund’s sub-advisors, Metropolitan West Asset Management LLC benefited from a long duration posture and an overweight to agency MBS. Western Asset Management Company Limited’s performance was boosted by a long duration posture and an overweight to corporate credit. Allspring Global Investments, LLC and MetLife Investment Management, LLC benefited from security selection in corporate bonds and securitized assets. Jennison Associates LLC’s steepening yield curve bias enhanced its performance. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Core Fixed Income Fund, Class F Shares - $119880 Bloomberg U.S. Aggregate Bond Index (USD) - $120044 Sep/14 $100000 $100000 Sep/15 $102364 $102941 Sep/16 $108135 $108286 Sep/17 $109241 $108364 Sep/18 $107567 $107047 Sep/19 $118806 $118068 Sep/20 $128018 $126315 Sep/21 $127912 $125184 Sep/22 $106555 $106908 Sep/23 $107026 $107597 Sep/24 $119880 $120044 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Core Fixed Income Fund, Class F Shares 12.01% 0.18% 1.83% Bloomberg U.S. Aggregate Bond Index (USD) 11.57% 0.33% 1.84% |
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 | $ 3,643,395,000 |
Holdings Count | Holding | 4,263 |
Advisory Fees Paid, Amount | $ 7,009 |
InvestmentCompanyPortfolioTurnover | 333% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $3,643,395 4,263 $7,009 333% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Derivative Contracts (Net) - Affiliated Partnership 0.0% Loan Participations 0.2% Municipal Bonds 0.2% U.S. Government Agency Obligations 0.3% Real Estate 0.8% Materials 0.8% Sovereign Debt 0.9% Cash Equivalent 1.0% Consumer Staples 1.3% Consumer Discretionary 1.4% Information Technology 1.4% Industrials 2.2% Utilities 2.2% Communication Services 2.3% Energy 2.5% Health Care 2.7% Asset-Backed Securities 8.7% Financials 9.2% U.S. Treasury Obligations 26.7% Mortgage-Backed Securities 39.7% Footnote Description Footnote Percentages are calculated based on total net assets. |
Largest Holdings [Text Block] | Top Ten Holdings Holding Name Coupon Rate Maturity Date Percentage of Total Net Assets Footnote Reference U.S. Treasury Notes 3.500% 09/30/29 5.2% U.S. Treasury Notes 3.875% 08/15/34 2.4% U.S. Treasury Bonds 4.125% 08/15/44 2.1% U.S. Treasury Notes 3.500% 09/30/26 1.8% U.S. Treasury Notes 3.375% 09/15/27 1.5% U.S. Treasury Bonds 4.250% 08/15/54 1.4% U.S. Treasury Notes 4.250% 02/28/31 1.4% U.S. Treasury Bonds 1.750% 08/15/41 0.9% U.S. Treasury Bonds 2.000% 11/15/41 0.8% FNMA 3.500% 10/15/54 0.7% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes In the upcoming reporting period, Western Asset Management Company, LLC and Western Asset Management Company Limited will be removed from the Fund. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports or upon request at 1-800-DIAL-SEI. |
C000018186 | |
Shareholder Report [Line Items] | |
Fund Name | Core Fixed Income Fund |
Class Name | Class I |
Trading Symbol | SCXIX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class I Shares of the Core Fixed Income 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Core Fixed Income Fund, Class I Shares $93 0.88% |
Expenses Paid, Amount | $ 93 |
Expense Ratio, Percent | 0.88% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class I Shares outperformed its benchmark, the Bloomberg US Aggregate Bond Index, for the 12-month period ending September 30, 2024. The reporting period began with the Federal Reserve (Fed) pausing after hiking short-term interest rates 11 times for a cumulative 525 basis points (5.25%) during 2022 and early 2023. Despite some bumps in the road, inflation largely moderated during the first nine months of 2024, and the Fed began its rate-cutting cycle with an aggressive 50-basis-point (0.50%) reduction at its September 2024 meeting. Spread sectors benefited from moderating inflation, the Fed pivoting to easing, and solid fundamentals for both corporations and consumers. A long duration posture contributed to the Fund’s outperformance versus the benchmark for the reporting period as yields fell across the U.S. Treasury yield curve. A steepening bias (which employs derivatives to benefit from escalating yield differences that occur as a result of increases in the yield spread between two Treasury securities of different maturities) bolstered Fund performance as short-term yields declined more sharply than long-term yields. An overweight position and security selection in the credit sector was a positive contributor to performance as corporate fundamentals remained relatively strong. An overweight allocation to agency mortgage-backed securities (MBS) also enhanced Fund performance for the period. Additionally, Fund performance was bolstered by both security selection and positioning within high-quality prime credit cards and auto asset-backed securities (ABS), as well as an allocation to AAA rated collateralized loan obligations (CLOs). Among the Fund’s sub-advisors, Metropolitan West Asset Management LLC benefited from a long duration posture and an overweight to agency MBS. Western Asset Management Company Limited’s performance was boosted by a long duration posture and an overweight to corporate credit. Allspring Global Investments, LLC and MetLife Investment Management, LLC benefited from security selection in corporate bonds and securitized assets. Jennison Associates LLC’s steepening yield curve bias enhanced its performance. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Core Fixed Income Fund, Class I Shares - $117324 Bloomberg U.S. Aggregate Bond Index (USD) - $120044 Sep/14 $100000 $100000 Sep/15 $102139 $102941 Sep/16 $107663 $108286 Sep/17 $108522 $108364 Sep/18 $106715 $107047 Sep/19 $117506 $118068 Sep/20 $126425 $126315 Sep/21 $126039 $125184 Sep/22 $104629 $106908 Sep/23 $104966 $107597 Sep/24 $117324 $120044 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Core Fixed Income Fund, Class I Shares 11.77% - 1.61% Bloomberg U.S. Aggregate Bond Index (USD) 11.57% 0.33% 1.84% |
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 | $ 3,643,395,000 |
Holdings Count | Holding | 4,263 |
Advisory Fees Paid, Amount | $ 7,009 |
InvestmentCompanyPortfolioTurnover | 333% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $3,643,395 4,263 $7,009 333% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Derivative Contracts (Net) - Affiliated Partnership 0.0% Loan Participations 0.2% Municipal Bonds 0.2% U.S. Government Agency Obligations 0.3% Real Estate 0.8% Materials 0.8% Sovereign Debt 0.9% Cash Equivalent 1.0% Consumer Staples 1.3% Consumer Discretionary 1.4% Information Technology 1.4% Industrials 2.2% Utilities 2.2% Communication Services 2.3% Energy 2.5% Health Care 2.7% Asset-Backed Securities 8.7% Financials 9.2% U.S. Treasury Obligations 26.7% Mortgage-Backed Securities 39.7% Footnote Description Footnote Percentages are calculated based on total net assets. |
Largest Holdings [Text Block] | Top Ten Holdings Holding Name Coupon Rate Maturity Date Percentage of Total Net Assets Footnote Reference U.S. Treasury Notes 3.500% 09/30/29 5.2% U.S. Treasury Notes 3.875% 08/15/34 2.4% U.S. Treasury Bonds 4.125% 08/15/44 2.1% U.S. Treasury Notes 3.500% 09/30/26 1.8% U.S. Treasury Notes 3.375% 09/15/27 1.5% U.S. Treasury Bonds 4.250% 08/15/54 1.4% U.S. Treasury Notes 4.250% 02/28/31 1.4% U.S. Treasury Bonds 1.750% 08/15/41 0.9% U.S. Treasury Bonds 2.000% 11/15/41 0.8% FNMA 3.500% 10/15/54 0.7% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes In the upcoming reporting period, Western Asset Management Company, LLC and Western Asset Management Company Limited will be removed from the Fund. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports or upon request at 1-800-DIAL-SEI. |
C000147384 | |
Shareholder Report [Line Items] | |
Fund Name | Core Fixed Income Fund |
Class Name | Class Y |
Trading Symbol | SCFYX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the Core Fixed Income 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Core Fixed Income Fund, Class Y Shares $44 0.41% |
Expenses Paid, Amount | $ 44 |
Expense Ratio, Percent | 0.41% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares outperformed its benchmark, the Bloomberg US Aggregate Bond Index, for the 12-month period ending September 30, 2024. The reporting period began with the Federal Reserve (Fed) pausing after hiking short-term interest rates 11 times for a cumulative 525 basis points (5.25%) during 2022 and early 2023. Despite some bumps in the road, inflation largely moderated during the first nine months of 2024, and the Fed began its rate-cutting cycle with an aggressive 50-basis-point (0.50%) reduction at its September 2024 meeting. Spread sectors benefited from moderating inflation, the Fed pivoting to easing, and solid fundamentals for both corporations and consumers. A long duration posture contributed to the Fund’s outperformance versus the benchmark for the reporting period as yields fell across the U.S. Treasury yield curve. A steepening bias (which employs derivatives to benefit from escalating yield differences that occur as a result of increases in the yield spread between two Treasury securities of different maturities) bolstered Fund performance as short-term yields declined more sharply than long-term yields. An overweight position and security selection in the credit sector was a positive contributor to performance as corporate fundamentals remained relatively strong. An overweight allocation to agency mortgage-backed securities (MBS) also enhanced Fund performance for the period. Additionally, Fund performance was bolstered by both security selection and positioning within high-quality prime credit cards and auto asset-backed securities (ABS), as well as an allocation to AAA rated collateralized loan obligations (CLOs). Among the Fund’s sub-advisors, Metropolitan West Asset Management LLC benefited from a long duration posture and an overweight to agency MBS. Western Asset Management Company Limited’s performance was boosted by a long duration posture and an overweight to corporate credit. Allspring Global Investments, LLC and MetLife Investment Management, LLC benefited from security selection in corporate bonds and securitized assets. Jennison Associates LLC’s steepening yield curve bias enhanced its performance. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Core Fixed Income Fund, Class Y Shares - $122736 Bloomberg U.S. Aggregate Bond Index (USD) - $120044 Sep/14 $100000 $100000 Sep/15 $102429 $102941 Sep/16 $108475 $108286 Sep/17 $109855 $108364 Sep/18 $108539 $107047 Sep/19 $120169 $118068 Sep/20 $129758 $126315 Sep/21 $129971 $125184 Sep/22 $108445 $106908 Sep/23 $109314 $107597 Sep/24 $122736 $120044 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Core Fixed Income Fund, Class Y Shares 12.28% 0.42% 2.07% Bloomberg U.S. Aggregate Bond Index (USD) 11.57% 0.33% 1.84% |
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 | $ 3,643,395,000 |
Holdings Count | Holding | 4,263 |
Advisory Fees Paid, Amount | $ 7,009 |
InvestmentCompanyPortfolioTurnover | 333% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $3,643,395 4,263 $7,009 333% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Derivative Contracts (Net) - Affiliated Partnership 0.0% Loan Participations 0.2% Municipal Bonds 0.2% U.S. Government Agency Obligations 0.3% Real Estate 0.8% Materials 0.8% Sovereign Debt 0.9% Cash Equivalent 1.0% Consumer Staples 1.3% Consumer Discretionary 1.4% Information Technology 1.4% Industrials 2.2% Utilities 2.2% Communication Services 2.3% Energy 2.5% Health Care 2.7% Asset-Backed Securities 8.7% Financials 9.2% U.S. Treasury Obligations 26.7% Mortgage-Backed Securities 39.7% Footnote Description Footnote Percentages are calculated based on total net assets. |
Largest Holdings [Text Block] | Top Ten Holdings Holding Name Coupon Rate Maturity Date Percentage of Total Net Assets Footnote Reference U.S. Treasury Notes 3.500% 09/30/29 5.2% U.S. Treasury Notes 3.875% 08/15/34 2.4% U.S. Treasury Bonds 4.125% 08/15/44 2.1% U.S. Treasury Notes 3.500% 09/30/26 1.8% U.S. Treasury Notes 3.375% 09/15/27 1.5% U.S. Treasury Bonds 4.250% 08/15/54 1.4% U.S. Treasury Notes 4.250% 02/28/31 1.4% U.S. Treasury Bonds 1.750% 08/15/41 0.9% U.S. Treasury Bonds 2.000% 11/15/41 0.8% FNMA 3.500% 10/15/54 0.7% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes In the upcoming reporting period, Western Asset Management Company, LLC and Western Asset Management Company Limited will be removed from the Fund. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports or upon request at 1-800-DIAL-SEI. |
C000018196 | |
Shareholder Report [Line Items] | |
Fund Name | High Yield Bond Fund |
Class Name | Class F |
Trading Symbol | SHYAX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the High Yield Bond 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 High Yield Bond Fund, Class F Shares $95 0.89% |
Expenses Paid, Amount | $ 95 |
Expense Ratio, Percent | 0.89% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares underperformed its benchmark, the ICE BofA U.S. High Yield Constrained Index, for the 12-month period ending September 30, 2024. Detractors from Fund performance for the reporting period included security selection within the transportation, technology and electronics, and retail sectors. A longstanding allocation to structured credit, which is managed by SEI Investments Management Corporation, boosted Fund performance. Additional contributors to Fund performance included an underweight position and security selection within the leisure sector, and an overweight and security selection within the health care sector. Among Fund managers, Ares Capital Management II LLC underperformed the Fund’s benchmark due to an underweight and selection within the telecommunications sector and security selection within basic industry. Benefit Street Partners, LLC underperformed due to security selection within the telecommunications sector and underweight exposure and security selection within technology and electronics. Brigade Capital Management, LP’s underperformance was attributable to security selection within the transportation and technology and electronics sectors. J.P. Morgan Investment Management, Inc. outperformed due to security selection within the capital goods and telecommunications sectors. T Rowe Price Associates, Inc.’s underperformance resulted from security selection within the capital goods sector and an underweight position and security selection within health care. Regarding the use of derivatives during the reporting period, the Fund employed currency forwards to hedge the currency risk of a position. The currency forwards did not have a significant impact on Fund performance. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | High Yield Bond Fund, Class F Shares - $162100 Bloomberg U.S. Aggregate Bond Index (USD)* - $120044 ICE BofA U.S. High Yield Constrained Index (USD) - $162087 Sep/14 $100000 $100000 $100000 Sep/15 $96789 $102941 $96465 Sep/16 $106895 $108286 $108835 Sep/17 $117318 $108364 $118688 Sep/18 $121878 $107047 $122183 Sep/19 $127056 $118068 $129879 Sep/20 $126640 $126315 $132764 Sep/21 $149235 $125184 $147977 Sep/22 $129858 $106908 $127165 Sep/23 $141907 $107597 $140130 Sep/24 $162100 $120044 $162087 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years High Yield Bond Fund, Class F Shares 14.23% 4.99% 4.95% Bloomberg U.S. Aggregate Bond Index (USD)* 11.57% 0.33% 1.84% ICE BofA U.S. High Yield Constrained Index (USD) 15.67% 4.53% 4.95% |
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 | $ 1,169,671,000 |
Holdings Count | Holding | 1,258 |
Advisory Fees Paid, Amount | $ 4,950 |
InvestmentCompanyPortfolioTurnover | 63% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $1,169,671 1,258 $4,950 63% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Derivative Contracts (Net) 0.0% Warrants 0.1% Preferred Stock 1.1% Cash Equivalent 1.8% Utilities 2.2% Consumer Staples 2.2% Real Estate 2.3% Information Technology 3.7% Health Care 7.2% Asset-Backed Securities 7.3% Materials 8.1% Industrials 8.5% Financials 8.6% Loan Participations 9.9% Energy 11.3% Communication Services 11.7% Consumer Discretionary 13.7% Footnote Description Footnote Percentages are calculated based on total net assets. |
Largest Holdings [Text Block] | Top Ten Holdings Holding Name Coupon Rate Maturity Date Percentage of Total Net Assets Footnote Reference TCP Whitney CLO, Ser 2017-1I, Cl SUB 0.000% 08/20/29 0.5% DISH Network 11.750% 11/15/27 0.5% Benefit Street Partners CLO V-B 0.000% 04/20/31 0.5% Team Health Holdings, Inc., Extended Term Loan, 1st Lien, CME Term SOFR + 5.250% 10.502% 03/02/27 0.4% Zayo Group Holdings Inc 4.000% 03/01/27 0.4% CCO Holdings 4.500% 08/15/30 0.4% Sabre GLBL 11.250% 12/15/27 0.4% Benefit Street Partners CLO X, Ser 2016-10A, Cl SUB 0.000% 04/20/34 0.4% CCO Holdings 4.250% 02/01/31 0.4% Tronox 4.625% 03/15/29 0.4% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000036884 | |
Shareholder Report [Line Items] | |
Fund Name | High Yield Bond Fund |
Class Name | Class I |
Trading Symbol | SEIYX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class I Shares of the High Yield Bond 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 High Yield Bond Fund, Class I Shares $120 1.12% |
Expenses Paid, Amount | $ 120 |
Expense Ratio, Percent | 1.12% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class I Shares underperformed its benchmark, the ICE BofA U.S. High Yield Constrained Index, for the 12-month period ending September 30, 2024. Detractors from Fund performance for the reporting period included security selection within the transportation, technology and electronics, and retail sectors. A longstanding allocation to structured credit, which is managed by SEI Investments Management Corporation, boosted Fund performance. Additional contributors to Fund performance included an underweight position and security selection within the leisure sector, and an overweight and security selection within the health care sector. Among Fund managers, Ares Capital Management II LLC underperformed the Fund’s benchmark due to an underweight and selection within the telecommunications sector and security selection within basic industry. Benefit Street Partners, LLC underperformed due to security selection within the telecommunications sector and underweight exposure and security selection within technology and electronics. Brigade Capital Management, LP’s underperformance was attributable to security selection within the transportation and technology and electronics sectors. J.P. Morgan Investment Management, Inc. outperformed due to security selection within the capital goods and telecommunications sectors. T Rowe Price Associates, Inc.’s underperformance resulted from security selection within the capital goods sector and an underweight position and security selection within health care. Regarding the use of derivatives during the reporting period, the Fund employed currency forwards to hedge the currency risk of a position. The currency forwards did not have a significant impact on Fund performance. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | High Yield Bond Fund, Class I Shares - $157629 Bloomberg U.S. Aggregate Bond Index (USD)* - $120044 ICE BofA U.S. High Yield Constrained Index (USD) - $162087 Sep/14 $100000 $100000 $100000 Sep/15 $96093 $102941 $96465 Sep/16 $105655 $108286 $108835 Sep/17 $115853 $108364 $118688 Sep/18 $120034 $107047 $122183 Sep/19 $124583 $118068 $129879 Sep/20 $124006 $126315 $132764 Sep/21 $145977 $125184 $147977 Sep/22 $126791 $106908 $127165 Sep/23 $138336 $107597 $140130 Sep/24 $157629 $120044 $162087 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years High Yield Bond Fund, Class I Shares 13.95% 4.82% 4.66% Bloomberg U.S. Aggregate Bond Index (USD)* 11.57% 0.33% 1.84% ICE BofA U.S. High Yield Constrained Index (USD) 15.67% 4.53% 4.95% |
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 | $ 1,169,671,000 |
Holdings Count | Holding | 1,258 |
Advisory Fees Paid, Amount | $ 4,950 |
InvestmentCompanyPortfolioTurnover | 63% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $1,169,671 1,258 $4,950 63% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Derivative Contracts (Net) 0.0% Warrants 0.1% Preferred Stock 1.1% Cash Equivalent 1.8% Utilities 2.2% Consumer Staples 2.2% Real Estate 2.3% Information Technology 3.7% Health Care 7.2% Asset-Backed Securities 7.3% Materials 8.1% Industrials 8.5% Financials 8.6% Loan Participations 9.9% Energy 11.3% Communication Services 11.7% Consumer Discretionary 13.7% Footnote Description Footnote Percentages are calculated based on total net assets. |
Largest Holdings [Text Block] | Top Ten Holdings Holding Name Coupon Rate Maturity Date Percentage of Total Net Assets Footnote Reference TCP Whitney CLO, Ser 2017-1I, Cl SUB 0.000% 08/20/29 0.5% DISH Network 11.750% 11/15/27 0.5% Benefit Street Partners CLO V-B 0.000% 04/20/31 0.5% Team Health Holdings, Inc., Extended Term Loan, 1st Lien, CME Term SOFR + 5.250% 10.502% 03/02/27 0.4% Zayo Group Holdings Inc 4.000% 03/01/27 0.4% CCO Holdings 4.500% 08/15/30 0.4% Sabre GLBL 11.250% 12/15/27 0.4% Benefit Street Partners CLO X, Ser 2016-10A, Cl SUB 0.000% 04/20/34 0.4% CCO Holdings 4.250% 02/01/31 0.4% Tronox 4.625% 03/15/29 0.4% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000147389 | |
Shareholder Report [Line Items] | |
Fund Name | High Yield Bond Fund |
Class Name | Class Y |
Trading Symbol | SIYYX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the High Yield Bond 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 High Yield Bond Fund, Class Y Shares $70 0.65% |
Expenses Paid, Amount | $ 70 |
Expense Ratio, Percent | 0.65% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares underperformed its benchmark, the ICE BofA U.S. High Yield Constrained Index, for the 12-month period ending September 30, 2024. Detractors from Fund performance for the reporting period included security selection within the transportation, technology and electronics, and retail sectors. A longstanding allocation to structured credit, which is managed by SEI Investments Management Corporation, boosted Fund performance. Additional contributors to Fund performance included an underweight position and security selection within the leisure sector, and an overweight and security selection within the health care sector. Among Fund managers, Ares Capital Management II LLC underperformed the Fund’s benchmark due to an underweight and selection within the telecommunications sector and security selection within basic industry. Benefit Street Partners, LLC underperformed due to security selection within the telecommunications sector and underweight exposure and security selection within technology and electronics. Brigade Capital Management, LP’s underperformance was attributable to security selection within the transportation and technology and electronics sectors. J.P. Morgan Investment Management, Inc. outperformed due to security selection within the capital goods and telecommunications sectors. T Rowe Price Associates, Inc.’s underperformance resulted from security selection within the capital goods sector and an underweight position and security selection within health care. Regarding the use of derivatives during the reporting period, the Fund employed currency forwards to hedge the currency risk of a position. The currency forwards did not have a significant impact on Fund performance. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | High Yield Bond Fund, Class Y Shares - $165944 Bloomberg U.S. Aggregate Bond Index (USD)* - $120044 ICE BofA U.S. High Yield Constrained Index (USD) - $162087 Sep/14 $100000 $100000 $100000 Sep/15 $96915 $102941 $96465 Sep/16 $107303 $108286 $108835 Sep/17 $117898 $108364 $118688 Sep/18 $122937 $107047 $122183 Sep/19 $128476 $118068 $129879 Sep/20 $128368 $126315 $132764 Sep/21 $151647 $125184 $147977 Sep/22 $132286 $106908 $127165 Sep/23 $144916 $107597 $140130 Sep/24 $165944 $120044 $162087 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years High Yield Bond Fund, Class Y Shares 14.51% 5.25% 5.20% Bloomberg U.S. Aggregate Bond Index (USD ) Footnote Reference 11.57% 0.33% 1.84% ICE BofA U.S. High Yield Constrained Index (USD) 15.67% 4.53% 4.95% |
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 | $ 1,169,671,000 |
Holdings Count | Holding | 1,258 |
Advisory Fees Paid, Amount | $ 4,950 |
InvestmentCompanyPortfolioTurnover | 63% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $1,169,671 1,258 $4,950 63% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Derivative Contracts (Net) 0.0% Warrants 0.1% Preferred Stock 1.1% Cash Equivalent 1.8% Utilities 2.2% Consumer Staples 2.2% Real Estate 2.3% Information Technology 3.7% Health Care 7.2% Asset-Backed Securities 7.3% Materials 8.1% Industrials 8.5% Financials 8.6% Loan Participations 9.9% Energy 11.3% Communication Services 11.7% Consumer Discretionary 13.7% Footnote Description Footnote Percentages are calculated based on total net assets. |
Largest Holdings [Text Block] | Top Ten Holdings Holding Name Coupon Rate Maturity Date Percentage of Total Net Assets Footnote Reference TCP Whitney CLO, Ser 2017-1I, Cl SUB 0.000% 08/20/29 0.5% DISH Network 11.750% 11/15/27 0.5% Benefit Street Partners CLO V-B 0.000% 04/20/31 0.5% Team Health Holdings, Inc., Extended Term Loan, 1st Lien, CME Term SOFR + 5.250% 10.502% 03/02/27 0.4% Zayo Group Holdings Inc 4.000% 03/01/27 0.4% CCO Holdings 4.500% 08/15/30 0.4% Sabre GLBL 11.250% 12/15/27 0.4% Benefit Street Partners CLO X, Ser 2016-10A, Cl SUB 0.000% 04/20/34 0.4% CCO Holdings 4.250% 02/01/31 0.4% Tronox 4.625% 03/15/29 0.4% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000167937 | |
Shareholder Report [Line Items] | |
Fund Name | Conservative Income Fund |
Class Name | Class F |
Trading Symbol | COIAX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the Conservative Income 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Conservative Income Fund, Class F Shares $31 0.30% |
Expenses Paid, Amount | $ 31 |
Expense Ratio, Percent | 0.30% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares performed in line with its benchmark, the ICE BofA U.S. 3-Month Treasury Bill Index, for the 12-month period ending September 30, 2024. The reporting period began with the Federal Reserve (Fed) pausing after hiking short-term interest rates 11 times for a cumulative 525 basis points (5.25%) during 2022 and early 2023. Despite some bumps in the road, inflation largely moderated during the first nine months of 2024, and the Fed began its rate-cutting cycle with an aggressive 50-basis-point (0.50%) cut at its September 2024 meeting. The supply of U.S. Treasury bills during the reporting period remained elevated, with the Treasury decreasing the weighted average maturity of its issuance given demand at the front end of the yield curve. Government money market assets under management reached peak levels as the yield curve remain inverted (short-term yields exceeded longer-term yields). Fundamentals for banks, the primary issuers of certificates of deposit (CDs) and commercial paper, remained strong, with healthy balance sheets and reduced leverage profiles supporting the sector. BlackRock Advisors, LLC (BlackRock) is the Fund’s sole sub-advisor. BlackRock’s performance for the reporting period benefited from positions in commercial paper and CDs, both of which offered higher yield relative to comparable-duration U.S. Treasurys. Fund performance over the full reporting period reflected the higher interest-rate environment. BlackRock adjusted the Fund’s weighted average maturity throughout the period as the Fed moved from being on hold to an interest-rate cut. BlackRock also reduced the Fund’s positions in floating-rate paper given the Fed’s pivot to easing monetary policy. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Conservative Income Fund, Class F Shares - $117724 Bloomberg U.S. Aggregate Bond Index (USD)* - $113850 ICE BofA U.S. 3-Month Treasury Bill Index (USD) - $117596 Apr/16 $100000 $100000 $100000 Sep/16 $100160 $102698 $100153 Sep/17 $100996 $102773 $100810 Sep/18 $102611 $101523 $102414 Sep/19 $104989 $111976 $104857 Sep/20 $105995 $119797 $106010 Sep/21 $106005 $118725 $106084 Sep/22 $106697 $101391 $106738 Sep/23 $111615 $102045 $111511 Sep/24 $117724 $113850 $117596 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years Annualized Since Inception Conservative Income Fund, Class F Shares 5.47% 2.32% 1.95% Bloomberg U.S. Aggregate Bond Index (USD)* 11.57% 0.33% 1.55% ICE BofA U.S. 3-Month Treasury Bill Index (USD) 5.46% 2.32% 1.94% |
Performance Inception Date | Apr. 22, 2016 |
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 | $ 721,772,000 |
Holdings Count | Holding | 144 |
Advisory Fees Paid, Amount | $ 374 |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) $721,772 144 $374 |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value U.S. Treasury Obligation 0.1% Consumer Staples 0.2% Financials 0.3% Consumer Discretionary 0.5% Certificates of Deposit 15.0% Repurchase Agreements 20.2% Commercial Paper 63.5% Footnote Description Footnote Percentages are calculated based on total net assets. |
Largest Holdings [Text Block] | Top Ten Holdings Holding Name Coupon Rate Maturity Date Percentage of Total Net Assets Bank of America Securities 4.880% 10/01/24 12.5% Goldman Sachs & Co 4.900% 10/01/24 6.9% Landesbank Baden-Wuerttemberg NY 4.841% 10/01/24 4.7% Overwatch Alpha Funding 4.841% 10/01/24 3.5% Automatic Data Processing 4.831% 10/02/24 2.8% Chesham Finance 4.851% 10/01/24 2.6% Bayerische Landesbank 4.835% 10/01/24 1.9% MUFG Bank 4.850% 10/01/24 1.8% Cabot Trail Funding 4.831% 10/01/24 1.4% Lime Funding 4.845% 10/02/24 1.4% |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000167938 | |
Shareholder Report [Line Items] | |
Fund Name | Conservative Income Fund |
Class Name | Class Y |
Trading Symbol | COIYX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the Conservative Income 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Conservative Income Fund, Class Y Shares $21 0.20% |
Expenses Paid, Amount | $ 21 |
Expense Ratio, Percent | 0.20% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares performed in line with its benchmark, the ICE BofA U.S. 3-Month Treasury Bill Index, for the 12-month period ending September 30, 2024. The reporting period began with the Federal Reserve (Fed) pausing after hiking short-term interest rates 11 times for a cumulative 525 basis points (5.25%) during 2022 and early 2023. Despite some bumps in the road, inflation largely moderated during the first nine months of 2024, and the Fed began its rate-cutting cycle with an aggressive 50-basis-point (0.50%) cut at its September 2024 meeting. The supply of U.S. Treasury bills during the reporting period remained elevated, with the Treasury decreasing the weighted average maturity of its issuance given demand at the front end of the yield curve. Government money market assets under management reached peak levels as the yield curve remain inverted (short-term yields exceeded longer-term yields). Fundamentals for banks, the primary issuers of certificates of deposit (CDs) and commercial paper, remained strong, with healthy balance sheets and reduced leverage profiles supporting the sector. BlackRock Advisors, LLC (BlackRock) is the Fund’s sole sub-advisor. BlackRock’s performance for the reporting period benefited from positions in commercial paper and CDs, both of which offered higher yield relative to comparable-duration U.S. Treasurys. Fund performance over the full reporting period reflected the higher interest-rate environment. BlackRock adjusted the Fund’s weighted average maturity throughout the period as the Fed moved from being on hold to an interest-rate cut. BlackRock also reduced the Fund’s positions in floating-rate paper given the Fed’s pivot to easing monetary policy. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Conservative Income Fund, Class Y Shares - $118732 Bloomberg U.S. Aggregate Bond Index (USD)* - $113850 ICE BofA U.S. 3-Month Treasury Bill Index (USD) - $117596 Apr/16 $100000 $100000 $100000 Sep/16 $100203 $102698 $100153 Sep/17 $101147 $102773 $100810 Sep/18 $102867 $101523 $102414 Sep/19 $105357 $111976 $104857 Sep/20 $106469 $119797 $106010 Sep/21 $106586 $118725 $106084 Sep/22 $107329 $101391 $106738 Sep/23 $112457 $102045 $111511 Sep/24 $118732 $113850 $117596 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years Annualized Since Inception Conservative Income Fund, Class Y Shares 5.58% 2.42% 2.05% Bloomberg U.S. Aggregate Bond Index (USD)* 11.57% 0.33% 1.55% ICE BofA U.S. 3-Month Treasury Bill Index (USD) 5.46% 2.32% 1.94% |
Performance Inception Date | Apr. 22, 2016 |
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 | $ 721,772,000 |
Holdings Count | Holding | 144 |
Advisory Fees Paid, Amount | $ 374 |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) $721,772 144 $374 |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value U.S. Treasury Obligation 0.1% Consumer Staples 0.2% Financials 0.3% Consumer Discretionary 0.5% Certificates of Deposit 15.0% Repurchase Agreements 20.2% Commercial Paper 63.5% Footnote Description Footnote Percentages are calculated based on total net assets. |
Largest Holdings [Text Block] | Top Ten Holdings Holding Name Coupon Rate Maturity Date Percentage of Total Net Assets Bank of America Securities 4.880% 10/01/24 12.5% Goldman Sachs & Co 4.900% 10/01/24 6.9% Landesbank Baden-Wuerttemberg NY 4.841% 10/01/24 4.7% Overwatch Alpha Funding 4.841% 10/01/24 3.5% Automatic Data Processing 4.831% 10/02/24 2.8% Chesham Finance 4.851% 10/01/24 2.6% Bayerische Landesbank 4.835% 10/01/24 1.9% MUFG Bank 4.850% 10/01/24 1.8% Cabot Trail Funding 4.831% 10/01/24 1.4% Lime Funding 4.845% 10/02/24 1.4% |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000167939 | |
Shareholder Report [Line Items] | |
Fund Name | Tax-Free Conservative Income Fund |
Class Name | Class F |
Trading Symbol | TFCAX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the Tax-Free Conservative Income 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Tax-Free Conservative Income Fund, Class F Shares $31 0.30% |
Expenses Paid, Amount | $ 31 |
Expense Ratio, Percent | 0.30% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares underperformed its benchmark, the ICE BofA U.S. 3-Month Treasury Bill Index, for the 12-month period ending September 30, 2024. Although the Fund’s performance is benchmarked against the return of the ICE BofA U.S. 3-Month Treasury Bill Index, an investment in the Fund differs from an investment in U.S. Treasury bills as the Fund invests in tax-exempt securities issued by state governments and local municipalities. Among other things, Treasury bills are backed by the full faith and credit of the U.S. government and have a fixed rate of return. Investors in Treasury bills do not risk losing their investment, whereas loss of money is a risk of investing in the Fund. The reporting period began with the Federal Reserve (Fed) pausing after hiking short-term interest rates 11 times for a cumulative 525 basis points (5.25%) during 2022 and early 2023. Despite some bumps in the road, inflation largely moderated during the first nine months of 2024, and the Fed began its rate-cutting cycle with an aggressive 50-basis-point (0.50%) reduction at its September 2024 meeting. Yields on municipal bonds moved lower along with Treasury yields during the period. The municipal sector continued to benefit from healthy labor and real estate markets, which resulted in strong tax receipts, combined with budget surpluses that were accumulated during the COVID-19 pandemic of the early 2020s. BlackRock Advisors, LLC, the Fund’s sole sub-advisor, recorded a positive absolute return during the reporting period, benefiting from a position in municipal commercial paper and certificates of deposit. The manager increased these allocations during the period as the Fund moved to extend its weighted average maturity. The Fund’s positions in variable-rate demand notes (VRDNs) linked to the SIFMA Municipal Swap Index (which tracks the performance of tax-exempt 7-day floating-rate municipal notes) also had a slightly positive impact on performance. Given their floating-rate structure, the Fund’s holdings in VRDNs were reduced over the period as yields moved lower. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Tax-Free Conservative Income Fund, Class F Shares - $110612 Bloomberg U.S. Aggregate Bond Index (USD)* - $113850 ICE BofA U.S. 3-Month Treasury Bill Index (USD) - $117596 Apr/16 $100000 $100000 $100000 Sep/16 $100116 $102698 $100153 Sep/17 $100631 $102773 $100810 Sep/18 $101626 $101523 $102414 Sep/19 $103019 $111976 $104857 Sep/20 $103683 $119797 $106010 Sep/21 $103693 $118725 $106084 Sep/22 $103990 $101391 $106738 Sep/23 $107027 $102045 $111511 Sep/24 $110612 $113850 $117596 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years Annualized Since Inception Tax-Free Conservative Income Fund, Class F Shares 3.35% 1.43% 1.20% Bloomberg U.S. Aggregate Bond Index (USD)* 11.57% 0.33% 1.55% ICE BofA U.S. 3-Month Treasury Bill Index (USD) 5.46% 2.32% 1.94% |
Performance Inception Date | Apr. 22, 2016 |
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 | $ 191,097,000 |
Holdings Count | Holding | 97 |
Advisory Fees Paid, Amount | $ 106 |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) $191,097 97 $106 |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Tax-Exempt Commercial Paper 17.0% Municipal Bonds 84.6% Footnote Description Footnote Percentages are calculated based on total net assets. |
Largest Holdings [Text Block] | Top Ten Holdings Holding Name Coupon Rate Maturity Date Percentage of Total Net Assets Iowa State, Finance Authority, Disaster Area Economic Development, CJ Bio America Project 3.310% 12/01/41 3.9% Lucie County, Florida Power & Light Project, Ser R 3.250% 09/01/28 3.7% Little Falls 5.000% 12/13/24 3.2% Colorado Springs, Utilities System Revenue, Ser C-REMK 3.130% 11/01/28 3.0% Port Arthur, Navigation District, Industrial Development, Petrochemicals USA Project 3.210% 03/01/39 2.8% Lincoln, Electrical System Revenue 3.280% 11/13/24 2.6% New York City, Sub-Ser D-4 2.200% 08/01/40 2.6% University of Texas 3.150% 01/14/25 2.4% Colorado State, Health Facilities Authority, Intermountain Healthcare, Ser S 3.150% 05/15/62 2.4% Northampton County, General Purpose Authority, St. Luke's University Health Network Project 2.200% 08/15/54 2.2% |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000167940 | |
Shareholder Report [Line Items] | |
Fund Name | Tax-Free Conservative Income Fund |
Class Name | Class Y |
Trading Symbol | TFCYX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the Tax-Free Conservative Income 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Tax-Free Conservative Income Fund, Class Y Shares $20 0.20% |
Expenses Paid, Amount | $ 20 |
Expense Ratio, Percent | 0.20% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares underperformed its benchmark, the ICE BofA U.S. 3-Month Treasury Bill Index, for the 12-month period ending September 30, 2024. Although the Fund’s performance is benchmarked against the return of the ICE BofA U.S. 3-Month Treasury Bill Index, an investment in the Fund differs from an investment in U.S. Treasury bills as the Fund invests in tax-exempt securities issued by state governments and local municipalities. Among other things, Treasury bills are backed by the full faith and credit of the U.S. government and have a fixed rate of return. Investors in Treasury bills do not risk losing their investment, whereas loss of money is a risk of investing in the Fund. The reporting period began with the Federal Reserve (Fed) pausing after hiking short-term interest rates 11 times for a cumulative 525 basis points (5.25%) during 2022 and early 2023. Despite some bumps in the road, inflation largely moderated during the first nine months of 2024, and the Fed began its rate-cutting cycle with an aggressive 50-basis-point (0.50%) reduction at its September 2024 meeting. Yields on municipal bonds moved lower along with Treasury yields during the period. The municipal sector continued to benefit from healthy labor and real estate markets, which resulted in strong tax receipts, combined with budget surpluses that were accumulated during the COVID-19 pandemic of the early 2020s. BlackRock Advisors, LLC, the Fund’s sole sub-advisor, recorded a positive absolute return during the reporting period, benefiting from a position in municipal commercial paper and certificates of deposit. The manager increased these allocations during the period as the Fund moved to extend its weighted average maturity. The Fund’s positions in variable-rate demand notes (VRDNs) linked to the SIFMA Municipal Swap Index (which tracks the performance of tax-exempt 7-day floating-rate municipal notes) also had a slightly positive impact on performance. Given their floating-rate structure, the Fund’s holdings in VRDNs were reduced over the period as yields moved lower. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Tax-Free Conservative Income Fund, Class Y Shares - $111583 Bloomberg U.S. Aggregate Bond Index (USD)* - $113850 ICE BofA U.S. 3-Month Treasury Bill Index (USD) - $117596 Apr/16 $100000 $100000 $100000 Sep/16 $100159 $102698 $100153 Sep/17 $100761 $102773 $100810 Sep/18 $101861 $101523 $102414 Sep/19 $103360 $111976 $104857 Sep/20 $104119 $119797 $106010 Sep/21 $104234 $118725 $106084 Sep/22 $104694 $101391 $106738 Sep/23 $107751 $102045 $111511 Sep/24 $111583 $113850 $117596 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years Annualized Since Inception Tax-Free Conservative Income Fund, Class Y Shares 3.56% 1.54% 1.31% Bloomberg U.S. Aggregate Bond Index (USD)* 11.57% 0.33% 1.55% ICE BofA U.S. 3-Month Treasury Bill Index (USD) 5.46% 2.32% 1.94% |
Performance Inception Date | Apr. 22, 2016 |
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 | $ 191,097,000 |
Holdings Count | Holding | 97 |
Advisory Fees Paid, Amount | $ 106 |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) $191,097 97 $106 |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Tax-Exempt Commercial Paper 17.0% Municipal Bonds 84.6% Footnote Description Footnote Percentages are calculated based on total net assets. |
Largest Holdings [Text Block] | Top Ten Holdings Holding Name Coupon Rate Maturity Date Percentage of Total Net Assets Iowa State, Finance Authority, Disaster Area Economic Development, CJ Bio America Project 3.310% 12/01/41 3.9% Lucie County, Florida Power & Light Project, Ser R 3.250% 09/01/28 3.7% Little Falls 5.000% 12/13/24 3.2% Colorado Springs, Utilities System Revenue, Ser C-REMK 3.130% 11/01/28 3.0% Port Arthur, Navigation District, Industrial Development, Petrochemicals USA Project 3.210% 03/01/39 2.8% Lincoln, Electrical System Revenue 3.280% 11/13/24 2.6% New York City, Sub-Ser D-4 2.200% 08/01/40 2.6% University of Texas 3.150% 01/14/25 2.4% Colorado State, Health Facilities Authority, Intermountain Healthcare, Ser S 3.150% 05/15/62 2.4% Northampton County, General Purpose Authority, St. Luke's University Health Network Project 2.200% 08/15/54 2.2% |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000036881 | |
Shareholder Report [Line Items] | |
Fund Name | Real Return Fund |
Class Name | Class F |
Trading Symbol | SRAAX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the Real Return 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Real Return Fund, Class F Shares $47 0.45% |
Expenses Paid, Amount | $ 47 |
Expense Ratio, Percent | 0.45% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares modestly underperformed its benchmark, the Bloomberg 1-5 Year U.S. TIPS Index, for the 12-month period ending September 30, 2024. The Fund’s positioning was closely aligned with that of its benchmark over the reporting period. Inflation continued to ease during the period, but remained above the Federal Reserve’s 2% target, and the macroeconomic focus shifted to economic growth and the health of the labor market. Tentative signs of cyclical moderation signaled the onset of a synchronized global monetary policy easing cycle. Against this backdrop, real yields rallied sharply across the yield curve and Treasury Inflation-Protected Securities (TIPS) delivered strong total returns. Inflation breakeven rates— the difference between the nominal yield on a fixed-rate bond and the real yield (an adjusted yield that takes into account the impact of inflation) on an inflation-linked bond of similar maturity and credit quality—tightened over the period, preventing real yields from keeping pace with the sharp rally in nominal yields. This led TIPS to underperform comparable-duration conventional Treasurys. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Real Return Fund, Class F Shares - $121094 Bloomberg U.S. Aggregate Bond Index (USD)* - $120044 Bloomberg 1-5 Year U.S. TIPS Index (USD) - $126533 Sep/14 $100000 $100000 $100000 Sep/15 $98435 $102941 $98781 Sep/16 $100719 $108286 $101624 Sep/17 $100747 $108364 $102038 Sep/18 $100987 $107047 $102787 Sep/19 $104157 $118068 $106566 Sep/20 $109340 $126315 $112279 Sep/21 $115092 $125184 $118858 Sep/22 $109887 $106908 $114001 Sep/23 $112572 $107597 $117240 Sep/24 $121094 $120044 $126533 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Real Return Fund, Class F Shares 7.57% 3.06% 1.93% Bloomberg U.S. Aggregate Bond Index (USD)* 11.57% 0.33% 1.84% Bloomberg 1-5 Year U.S. TIPS Index (USD) 7.93% 3.49% 2.38% |
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 | $ 384,120,000 |
Holdings Count | Holding | 23 |
Advisory Fees Paid, Amount | $ 400 |
InvestmentCompanyPortfolioTurnover | 41% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $384,120 23 $400 41% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Cash Equivalent 0.1% U.S. Treasury Obligations 99.6% Footnote Description Footnote Percentages are calculated based on total net assets. |
Largest Holdings [Text Block] | Top Ten Holdings Holding Name Coupon Rate Maturity Date Percentage of Total Net Assets Footnote Reference U.S. Treasury Inflation Protected Securities 2.125% 04/15/29 6.6% U.S. Treasury Inflation Protected Securities 2.375% 10/15/28 6.4% U.S. Treasury Inflation Protected Securities 1.625% 10/15/27 6.1% U.S. Treasury Inflation Protected Securities 1.250% 04/15/28 5.9% U.S. Treasury Inflation Protected Securities 0.125% 04/15/27 5.8% U.S. Treasury Inflation Protected Securities 0.125% 10/15/26 5.7% U.S. Treasury Inflation Protected Securities 0.125% 10/15/25 5.4% U.S. Treasury Inflation Protected Securities 0.500% 01/15/28 5.3% U.S. Treasury Inflation Protected Securities 0.375% 07/15/27 5.2% U.S. Treasury Inflation Protected Securities 0.125% 07/15/26 5.1% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000147397 | |
Shareholder Report [Line Items] | |
Fund Name | Real Return Fund |
Class Name | Class Y |
Trading Symbol | SRYRX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the Real Return 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Real Return Fund, Class Y Shares $36 0.35% |
Expenses Paid, Amount | $ 36 |
Expense Ratio, Percent | 0.35% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares modestly underperformed its benchmark, the Bloomberg 1-5 Year U.S. TIPS Index, for the 12-month period ending September 30, 2024. The Fund’s positioning was closely aligned with that of its benchmark over the reporting period. Inflation continued to ease during the period, but remained above the Federal Reserve’s 2% target, and the macroeconomic focus shifted to economic growth and the health of the labor market. Tentative signs of cyclical moderation signaled the onset of a synchronized global monetary policy easing cycle. Against this backdrop, real yields rallied sharply across the yield curve and Treasury Inflation-Protected Securities (TIPS) delivered strong total returns. Inflation breakeven rates— the difference between the nominal yield on a fixed-rate bond and the real yield (an adjusted yield that takes into account the impact of inflation) on an inflation-linked bond of similar maturity and credit quality—tightened over the period, preventing real yields from keeping pace with the sharp rally in nominal yields. This led TIPS to underperform comparable-duration conventional Treasurys. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Real Return Fund, Class Y Shares - $122318 Bloomberg U.S. Aggregate Bond Index (USD)* - $120044 Bloomberg 1-5 Year U.S. TIPS Index (USD) - $126533 Sep/14 $100000 $100000 $100000 Sep/15 $98534 $102941 $98781 Sep/16 $101017 $108286 $101624 Sep/17 $101125 $108364 $102038 Sep/18 $101417 $107047 $102787 Sep/19 $104773 $118068 $106566 Sep/20 $110020 $126315 $112279 Sep/21 $116038 $125184 $118858 Sep/22 $110936 $106908 $114001 Sep/23 $113638 $107597 $117240 Sep/24 $122318 $120044 $126533 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Real Return Fund, Class Y Shares 7.64% 3.15% 2.03% Bloomberg U.S. Aggregate Bond Index (USD ) Footnote Reference 11.57% 0.33% 1.84% Bloomberg 1-5 Year U.S. TIPS Index (USD) 7.93% 3.49% 2.38% |
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 | $ 384,120,000 |
Holdings Count | Holding | 23 |
Advisory Fees Paid, Amount | $ 400 |
InvestmentCompanyPortfolioTurnover | 41% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $384,120 23 $400 41% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Cash Equivalent 0.1% U.S. Treasury Obligations 99.6% Footnote Description Footnote Percentages are calculated based on total net assets. |
Largest Holdings [Text Block] | Top Ten Holdings Holding Name Coupon Rate Maturity Date Percentage of Total Net Assets Footnote Reference U.S. Treasury Inflation Protected Securities 2.125% 04/15/29 6.6% U.S. Treasury Inflation Protected Securities 2.375% 10/15/28 6.4% U.S. Treasury Inflation Protected Securities 1.625% 10/15/27 6.1% U.S. Treasury Inflation Protected Securities 1.250% 04/15/28 5.9% U.S. Treasury Inflation Protected Securities 0.125% 04/15/27 5.8% U.S. Treasury Inflation Protected Securities 0.125% 10/15/26 5.7% U.S. Treasury Inflation Protected Securities 0.125% 10/15/25 5.4% U.S. Treasury Inflation Protected Securities 0.500% 01/15/28 5.3% U.S. Treasury Inflation Protected Securities 0.375% 07/15/27 5.2% U.S. Treasury Inflation Protected Securities 0.125% 07/15/26 5.1% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000158774 | |
Shareholder Report [Line Items] | |
Fund Name | Dynamic Asset Allocation Fund |
Class Name | Class F |
Trading Symbol | SDYAX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the Dynamic Asset Allocation 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Dynamic Asset Allocation Fund, Class F Shares $87 0.75% |
Expenses Paid, Amount | $ 87 |
Expense Ratio, Percent | 0.75% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares underperformed its benchmark, the S&P 500 Index (Gross), for the 12-month period ending September 30, 2024. The largest detractor from Fund performance for the reporting period was a relative value position that was long the S&P 500 Equal Weight Index and short the S&P 500 Index. The position sought to benefit from a potential broadening of performance beyond the “Magnificent Seven” mega-cap tech companies which dominated the performance of the S&P 500 Index. However, the position weighed on Fund performance as these companies continued to lead the market. Other detractors included put option (which gives the holder the right to sell a stock at a specified price) spreads on the S&P 500 Index, which were intended to provide downside protection against a decline in the U.S. equity market. Given the resilience of the U.S. equity market, these positions expired at a loss. A position in broad commodities via a Bloomberg Commodity Index total return swap detracted as the commodities market came under pressure amid weakness in the energy sector on demand concerns. Positive contributors to Fund performance over the period included two U.S. yield-curve steepeners which benefit from a steepening of the U.S. yield curve (an increase in the difference between short-term yields and long-term yields). As short-term yields declined with market pricing of Federal Reserve interest-rate cuts, the yield curve steepened. Fund performance also benefited from a relative value position between U.S. and European short-term rates. The position benefited from a greater decline in European short-term rates versus U.S. short-term rates. Derivatives had a significant impact on Fund performance for the reporting period. Interest-rate swaps in aggregate detracted from performance as they were positioned for a rise in interest rates; global interest rates declined over the period. Put options on the U.S. equity market and Cboe Volatility Index (VIX) declined as equities performed well over the period. Put options on currencies hampered Fund performance during the period. Positions in consumer-price index (CPI) swaps detracted during the period as inflation expectations eased. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Dynamic Asset Allocation Fund, Class F Shares - $283676 S&P 500 ® Jul/15 $100000 $100000 Sep/15 $90900 $91434 Sep/16 $102163 $105543 Sep/17 $122543 $125184 Sep/18 $135959 $147605 Sep/19 $138864 $153884 Sep/20 $159794 $177195 Sep/21 $212078 $230363 Sep/22 $183314 $194721 Sep/23 $215657 $236814 Sep/24 $283676 $322900 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years Annualized Since Inception Dynamic Asset Allocation Fund, Class F Shares 31.54% 15.36% 12.03% S&P 500 ® 36.35% 15.98% 13.62% |
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 | $ 828,111,000 |
Holdings Count | Holding | 526 |
Advisory Fees Paid, Amount | $ 1,423 |
InvestmentCompanyPortfolioTurnover | 14% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $828,111 526 $1,423 14% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Cash Equivalent 0.5% Derivative Contracts (Net) 0.9% Materials 1.8% Real Estate 1.9% Utilities 2.0% Energy 2.7% Consumer Staples 4.7% Cash Collateral 4.7% Industrials 6.9% Communication Services 7.1% Consumer Discretionary 8.1% Health Care 9.4% Financials 10.4% Information Technology 25.5% 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 Footnote Reference Apple Inc 5.9% McKesson 5.3% Microsoft Corp 5.3% NVIDIA Corp 4.9% Amazon.com Inc, Cl A 2.9% MARGIN DEPOSIT COUNTERPARTY: GOLDMAN SACHS FUTURES COLLATERAL 2.1% Meta Platforms Inc, Cl A 2.1% RECV OIS 4.35 11/02/2031 2.0% Alphabet Inc, Cl A 1.6% Berkshire Hathaway Inc, Cl B 1.4% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000158775 | |
Shareholder Report [Line Items] | |
Fund Name | Dynamic Asset Allocation Fund |
Class Name | Class Y |
Trading Symbol | SDYYX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the Dynamic Asset Allocation 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Dynamic Asset Allocation Fund, Class Y Shares $58 0.50% |
Expenses Paid, Amount | $ 58 |
Expense Ratio, Percent | 0.50% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares underperformed its benchmark, the S&P 500 Index (Gross), for the 12-month period ending September 30, 2024. The largest detractor from Fund performance for the reporting period was a relative value position that was long the S&P 500 Equal Weight Index and short the S&P 500 Index. The position sought to benefit from a potential broadening of performance beyond the “Magnificent Seven” mega-cap tech companies which dominated the performance of the S&P 500 Index. However, the position weighed on Fund performance as these companies continued to lead the market. Other detractors included put option (which gives the holder the right to sell a stock at a specified price) spreads on the S&P 500 Index, which were intended to provide downside protection against a decline in the U.S. equity market. Given the resilience of the U.S. equity market, these positions expired at a loss. A position in broad commodities via a Bloomberg Commodity Index total return swap detracted as the commodities market came under pressure amid weakness in the energy sector on demand concerns. Positive contributors to Fund performance over the period included two U.S. yield-curve steepeners which benefit from a steepening of the U.S. yield curve (an increase in the difference between short-term yields and long-term yields). As short-term yields declined with market pricing of Federal Reserve interest-rate cuts, the yield curve steepened. Fund performance also benefited from a relative value position between U.S. and European short-term rates. The position benefited from a greater decline in European short-term rates versus U.S. short-term rates. Derivatives had a significant impact on Fund performance for the reporting period. Interest-rate swaps in aggregate detracted from performance as they were positioned for a rise in interest rates; global interest rates declined over the period. Put options on the U.S. equity market and Cboe Volatility Index (VIX) declined as equities performed well over the period. Put options on currencies hampered Fund performance during the period. Positions in consumer-price index (CPI) swaps detracted during the period as inflation expectations eased. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Dynamic Asset Allocation Fund, Class Y Shares - $289829 S&P 500 ® Jul/15 $100000 $100000 Sep/15 $90900 $91434 Sep/16 $102421 $105543 Sep/17 $123076 $125184 Sep/18 $136930 $147605 Sep/19 $140257 $153884 Sep/20 $161732 $177195 Sep/21 $215184 $230363 Sep/22 $186270 $194721 Sep/23 $219697 $236814 Sep/24 $289829 $322900 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years Annualized Since Inception Dynamic Asset Allocation Fund, Class Y Shares 31.92% 15.62% 12.29% S&P 500 ® 36.35% 15.98% 13.62% |
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 | $ 828,111,000 |
Holdings Count | Holding | 526 |
Advisory Fees Paid, Amount | $ 1,423 |
InvestmentCompanyPortfolioTurnover | 14% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $828,111 526 $1,423 14% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Cash Equivalent 0.5% Derivative Contracts (Net) 0.9% Materials 1.8% Real Estate 1.9% Utilities 2.0% Energy 2.7% Consumer Staples 4.7% Cash Collateral 4.7% Industrials 6.9% Communication Services 7.1% Consumer Discretionary 8.1% Health Care 9.4% Financials 10.4% Information Technology 25.5% 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 Footnote Reference Apple Inc 5.9% McKesson 5.3% Microsoft Corp 5.3% NVIDIA Corp 4.9% Amazon.com Inc, Cl A 2.9% MARGIN DEPOSIT COUNTERPARTY: GOLDMAN SACHS FUTURES COLLATERAL 2.1% Meta Platforms Inc, Cl A 2.1% RECV OIS 4.35 11/02/2031 2.0% Alphabet Inc, Cl A 1.6% Berkshire Hathaway Inc, Cl B 1.4% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000085250 | |
Shareholder Report [Line Items] | |
Fund Name | Multi-Strategy Alternative Fund |
Class Name | Class F |
Trading Symbol | SMSAX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the Multi-Strategy Alternative 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Multi-Strategy Alternative Fund, Class F Shares $285 2.70% |
Expenses Paid, Amount | $ 285 |
Expense Ratio, Percent | 2.70% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares outperformed its benchmark, the ICE BofA U.S. 3-Month Treasury Bill Index, for the 12-month period ending September 30, 2024. All of the Fund’s sub-advisors performed well over the reporting period. The strongest performers were the two equity hedge sub-advisors: Kettle Hill Capital Management and Mountaineer Partners Management. Both managers benefited from rising equity markets and positive security selection in mid-cap U.S. stocks and the materials and industrials sectors, respectively. The relative value strategy was the second-largest contributor to Fund performance. Brigade Capital Management’s (Brigade) performance was bolstered by investments in several high-yield bond and loan issues, as well as the sub-adviser’s ability to minimize losses from hedges. Global Credit Advisers (GCA) recorded more modest gains due to its sizable short portfolio, which detracted from Fund performance. Finally, the event-driven strategy, which is composed of a fund focused on merger arbitrage, underperformed the Fund’s benchmark, the ICE BofA U.S. 3-Month Treasury Bill Index, for the reporting period. The environment for merger arbitrage proved to be difficult over the period as U.S. regulators challenged numerous transactions. During the reporting period, GCA and Brigade were the two sub-advisors accounting for the vast majority of the Fund’s derivative exposure which consisted primarily of long credit protection through credit default swaps (CDS) on individual corporate bond issuers or baskets of issuers. The managers employ CDS protection for hedging or to express a negative view on the creditworthiness of a specific issuer. Overall, derivatives detracted from Fund performance for the period as credit spreads generally narrowed, resulting in market-to-market losses (a measure of the unrealized losses on a financial instrument that has been marked to its current market value) on CDS positions. However, these losses were more than offset by gains on bond and loan holdings in the remainder of the Fund’s portfolio. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Multi-Strategy Alternative Fund, Class F Shares - $132135 Bloomberg U.S. Aggregate Bond Index (USD)* - $120044 ICE BofA U.S. 3-Month Treasury Bill Index (USD) - $117767 Sep/14 $100000 $100000 $100000 Sep/15 $97024 $102941 $100025 Sep/16 $100327 $108286 $100299 Sep/17 $104966 $108364 $100957 Sep/18 $107180 $107047 $102563 Sep/19 $106992 $118068 $105009 Sep/20 $112232 $126315 $106165 Sep/21 $121853 $125184 $106239 Sep/22 $113030 $106908 $106894 Sep/23 $119136 $107597 $111674 Sep/24 $132135 $120044 $117767 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Multi-Strategy Alternative Fund, Class F Shares 10.91% 4.31% 2.83% Bloomberg U.S. Aggregate Bond Index (USD)* 11.57% 0.33% 1.84% ICE BofA U.S. 3-Month Treasury Bill Index (USD) 5.46% 2.32% 1.65% |
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 | $ 269,029,000 |
Holdings Count | Holding | 480 |
Advisory Fees Paid, Amount | $ 2,351 |
InvestmentCompanyPortfolioTurnover | 277% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $269,029 480 $2,351 277% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value U.S. Treasury Obligations - Derivative Contracts (Net) 0.0% Warrants 0.0% Preferred Stock 0.2% Mortgage-Backed Securities 0.2% Utilities 0.5% Real Estate 0.5% Financials 1.3% Consumer Staples 1.4% Health Care 2.6% Information Technology 4.7% Industrials 4.7% Loan Participations 5.2% Communication Services 5.3% Energy 6.5% Materials 7.3% Cash Equivalent 7.5% Consumer Discretionary 8.9% Registered Investment Companies 18.1% 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 Footnote Reference Merger Fund, Cl I 20.3% United Parcel Service Inc, Cl B 1.1% AT&T Inc 0.9% Allied Universal Holdco 0.9% Verizon Communications Inc 0.9% Penn Entertainment Inc 0.9% Cloud Software Group 0.9% Century Aluminum Co 0.8% Materion Corp 0.8% ATI Inc 0.8% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000147402 | |
Shareholder Report [Line Items] | |
Fund Name | Multi-Strategy Alternative Fund |
Class Name | Class Y |
Trading Symbol | SMUYX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the Multi-Strategy Alternative 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Multi-Strategy Alternative Fund, Class Y Shares $258 2.44% |
Expenses Paid, Amount | $ 258 |
Expense Ratio, Percent | 2.44% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares outperformed its benchmark, the ICE BofA U.S. 3-Month Treasury Bill Index, for the 12-month period ending September 30, 2024. All of the Fund’s sub-advisors performed well over the reporting period. The strongest performers were the two equity hedge sub-advisors: Kettle Hill Capital Management and Mountaineer Partners Management. Both managers benefited from rising equity markets and positive security selection in mid-cap U.S. stocks and the materials and industrials sectors, respectively. The relative value strategy was the second-largest contributor to Fund performance. Brigade Capital Management’s (Brigade) performance was bolstered by investments in several high-yield bond and loan issues, as well as the sub-adviser’s ability to minimize losses from hedges. Global Credit Advisers (GCA) recorded more modest gains due to its sizable short portfolio, which detracted from Fund performance. Finally, the event-driven strategy, which is composed of a fund focused on merger arbitrage, underperformed the Fund’s benchmark, the ICE BofA U.S. 3-Month Treasury Bill Index, for the reporting period. The environment for merger arbitrage proved to be difficult over the period as U.S. regulators challenged numerous transactions. During the reporting period, GCA and Brigade were the two sub-advisors accounting for the vast majority of the Fund’s derivative exposure which consisted primarily of long credit protection through credit default swaps (CDS) on individual corporate bond issuers or baskets of issuers. The managers employ CDS protection for hedging or to express a negative view on the creditworthiness of a specific issuer. Overall, derivatives detracted from Fund performance for the period as credit spreads generally narrowed, resulting in market-to-market losses (a measure of the unrealized losses on a financial instrument that has been marked to its current market value) on CDS positions. However, these losses were more than offset by gains on bond and loan holdings in the remainder of the Fund’s portfolio. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Multi-Strategy Alternative Fund, Class Y Shares - $135349 Bloomberg U.S. Aggregate Bond Index (USD)* - $120044 ICE BofA U.S. 3-Month Treasury Bill Index (USD) - $117767 Sep/14 $100000 $100000 $100000 Sep/15 $97024 $102941 $100025 Sep/16 $100677 $108286 $100299 Sep/17 $105608 $108364 $100957 Sep/18 $108101 $107047 $102563 Sep/19 $108093 $118068 $105009 Sep/20 $113671 $126315 $106165 Sep/21 $123830 $125184 $106239 Sep/22 $115046 $106908 $106894 Sep/23 $121584 $107597 $111674 Sep/24 $135349 $120044 $117767 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Multi-Strategy Alternative Fund, Class Y Shares 11.32% 4.60% 3.07% Bloomberg U.S. Aggregate Bond Index (USD ) Footnote Reference 11.57% 0.33% 1.84% ICE BofA U.S. 3-Month Treasury Bill Index (USD) 5.46% 2.32% 1.65% |
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 | $ 269,029,000 |
Holdings Count | Holding | 480 |
Advisory Fees Paid, Amount | $ 2,351 |
InvestmentCompanyPortfolioTurnover | 277% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $269,029 480 $2,351 277% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value U.S. Treasury Obligations - Derivative Contracts (Net) 0.0% Warrants 0.0% Preferred Stock 0.2% Mortgage-Backed Securities 0.2% Utilities 0.5% Real Estate 0.5% Financials 1.3% Consumer Staples 1.4% Health Care 2.6% Information Technology 4.7% Industrials 4.7% Loan Participations 5.2% Communication Services 5.3% Energy 6.5% Materials 7.3% Cash Equivalent 7.5% Consumer Discretionary 8.9% Registered Investment Companies 18.1% 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 Footnote Reference Merger Fund, Cl I 20.3% United Parcel Service Inc, Cl B 1.1% AT&T Inc 0.9% Allied Universal Holdco 0.9% Verizon Communications Inc 0.9% Penn Entertainment Inc 0.9% Cloud Software Group 0.9% Century Aluminum Co 0.8% Materion Corp 0.8% ATI Inc 0.8% Footnote Description Footnote Cash Equivalents are not shown in the top ten chart. |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000243126 | |
Shareholder Report [Line Items] | |
Fund Name | Liquid Alternative Fund |
Class Name | Class F |
Trading Symbol | LLOBX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the Liquid Alternative 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Liquid Alternative Fund, Class F Shares $108 1.04% |
Expenses Paid, Amount | $ 108 |
Expense Ratio, Percent | 1.04% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares outperformed its benchmark, the ICE BofA U.S. 3-Month Treasury Bill Index, for the 12-month period ending September 30, 2024. The Fund’s balance sheet consists of cash equivalents, which generated positive interest income over the reporting period. The Fund generates its active return through positions in exchange traded futures contracts. The largest contributors to the Fund’s relative performance were long positions in several equity market indices, most notably the MSCI EAFE Index and the Nasdaq 100 Index, which benefited from rising stock prices over the period. Equity index exposure peaked during the first quarter of 2024, and has since been reduced, but remains significant. Currencies were a small positive contributor to the Fund’s relative performance, driven by a short position in the Japanese yen. Fixed-income trading was a detractor from performance for the reporting period. The Fund maintained a short position in 10- and 30 year government bond futures, which weighed on performance as yields declined over the period (and bond prices rose). |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Liquid Alternative Fund, Class F Shares - $109107 Bloomberg U.S. Aggregate Bond Index (USD)* - $107964 ICE BofA U.S. 3-Month Treasury Bill Index (USD) - $106842 Jun/23 $100000 $100000 $100000 Sep/23 $101600 $96769 $101314 Sep/24 $109107 $107964 $106842 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year Annualized Since Inception Liquid Alternative Fund, Class F Shares 7.39% 7.19% Bloomberg U.S. Aggregate Bond Index (USD)* 11.57% 6.30% ICE BofA U.S. 3-Month Treasury Bill Index (USD) 5.46% 5.42% |
Performance Inception Date | Jun. 30, 2023 |
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 | $ 203,733,000 |
Holdings Count | Holding | 19 |
Advisory Fees Paid, Amount | $ 602 |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) $203,733 19 $602 |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Derivative Contracts (Net) 1.4% 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 AUDUSD CRNCY FUT DEC24 1.4% MSCI EMGMKT DEC24 0.5% MSCI EAFE DEC24 0.3% NASDAQ 100 E-MINI DEC24 0.3% S&P MID 400 EMINI DEC24 0.2% S&P500 EMINI FUT DEC24 0.2% E-MINI RUSS 2000 DEC24 0.2% JPN YEN CURR FUT DEC24 0.1% US LONG BOND(CBT) DEC24 0.0% DOLLAR INDEX DEC24 0.0% |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000243125 | |
Shareholder Report [Line Items] | |
Fund Name | Liquid Alternative Fund |
Class Name | Class Y |
Trading Symbol | LLOAX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the Liquid Alternative 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Liquid Alternative Fund, Class Y Shares $83 0.80% |
Expenses Paid, Amount | $ 83 |
Expense Ratio, Percent | 0.80% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares outperformed its benchmark, the ICE BofA U.S. 3-Month Treasury Bill Index, for the 12-month period ending September 30, 2024. The Fund’s balance sheet consists of cash equivalents, which generated positive interest income over the reporting period. The Fund generates its active return through positions in exchange traded futures contracts. The largest contributors to the Fund’s relative performance were long positions in several equity market indices, most notably the MSCI EAFE Index and the Nasdaq 100 Index, which benefited from rising stock prices over the period. Equity index exposure peaked during the first quarter of 2024, and has since been reduced, but remains significant. Currencies were a small positive contributor to the Fund’s relative performance, driven by a short position in the Japanese yen. Fixed-income trading was a detractor from performance for the reporting period. The Fund maintained a short position in 10- and 30 year government bond futures, which weighed on performance as yields declined over the period (and bond prices rose). |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Liquid Alternative Fund, Class Y Shares - $109349 Bloomberg U.S. Aggregate Bond Index (USD)* - $107964 ICE BofA U.S. 3-Month Treasury Bill Index (USD) - $106842 Jun/23 $100000 $100000 $100000 Sep/23 $101700 $96769 $101314 Sep/24 $109349 $107964 $106842 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year Annualized Since Inception Liquid Alternative Fund, Class Y Shares 7.52% 7.38% Bloomberg U.S. Aggregate Bond Index (USD)* 11.57% 6.30% ICE BofA U.S. 3-Month Treasury Bill Index (USD) 5.46% 5.42% |
Performance Inception Date | Jun. 30, 2023 |
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 | $ 203,733,000 |
Holdings Count | Holding | 19 |
Advisory Fees Paid, Amount | $ 602 |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) $203,733 19 $602 |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Derivative Contracts (Net) 1.4% 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 AUDUSD CRNCY FUT DEC24 1.4% MSCI EMGMKT DEC24 0.5% MSCI EAFE DEC24 0.3% NASDAQ 100 E-MINI DEC24 0.3% S&P MID 400 EMINI DEC24 0.2% S&P500 EMINI FUT DEC24 0.2% E-MINI RUSS 2000 DEC24 0.2% JPN YEN CURR FUT DEC24 0.1% US LONG BOND(CBT) DEC24 0.0% DOLLAR INDEX DEC24 0.0% |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000109624 | |
Shareholder Report [Line Items] | |
Fund Name | Multi-Asset Accumulation Fund |
Class Name | Class F |
Trading Symbol | SAAAX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the Multi-Asset Accumulation 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Multi-Asset Accumulation Fund, Class F Shares $127 1.17% |
Expenses Paid, Amount | $ 127 |
Expense Ratio, Percent | 1.17% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares underperformed its benchmark, a hybrid of 60% MSCI World Index (Net) (USD Hedged) and 40% Bloomberg Global Aggregate Index (USD Hedged) for the 12-month period ending September 30, 2024. The Fund's underweight position in global equities detracted from performance for the reporting period, while its broad exposure to commodities and overweight allocation to global sovereign bonds, including global inflation-linked bonds, contributed to relative performance. Among the Fund’s sub-advisors, AQR Capital Management, LLC and PanAgora Asset Management Inc. underperformed the hybrid benchmark during the reporting period due mainly to their underweight allocations to global equities, which performed well, driven by resilient corporate earnings and improving economic sentiment, particularly in the U.S. Overweights to inflation-related assets and nominal bonds benefited both managers. Commodities saw mixed performance but generally ended the period with positive returns; energy prices declined, while precious metals outperformed. Nominal bonds benefited from the anticipation of interest-rate cuts by central banks, and, despite signs of moderating inflation, Treasury Inflation-Protected Securities (TIPS) were supported by attractive yields relative to nominal Treasuries. SEI Investments Management Corporation (SIMC) replaced PanAgora Asset Management Inc. after the sub-advisor was terminated late in the reporting period. SIMC’s performance was bolstered by inflation-related assets such as TIPS, and positions in commodities, which performed well in August and September, despite signs of moderating inflation. Derivatives had a significant impact on Fund performance for the reporting period. Sovereign bond index futures, interest-rate swaps, and sovereign bond total-return swaps produced positive returns as global interest rates declined. Developed and emerging-market equity futures contributed positively to performance. The Fund's strategic commodity exposure through futures and swaps also benefited performance. Forward-currency contracts on emerging-market currencies detracted from the Fund’s absolute and relative performance, while developed-market currency forward contracts, used to hedge foreign-currency risk against the U.S. dollar, had a positive impact for the period. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Multi-Asset Accumulation Fund, Class F Shares - $140726 MSCI ACWI ex-USA Index (Net) (USD)* - $166302 60% MSCI World Index (Net)(Hedged)(USD) / 40% Bloomberg Global Aggregate Index (Hedged) (USD) - $213690 Sep/14 $100000 $100000 $100000 Sep/15 $96017 $87837 $100835 Sep/16 $106925 $95968 $110212 Sep/17 $111559 $114787 $121992 Sep/18 $114829 $116810 $131883 Sep/19 $128544 $115375 $140991 Sep/20 $130484 $118838 $151939 Sep/21 $148406 $147259 $177362 Sep/22 $117557 $110199 $153239 Sep/23 $120600 $132667 $174005 Sep/24 $140726 $166302 $213690 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Multi-Asset Accumulation Fund, Class F Shares 16.69% 1.83% 3.48% MSCI ACWI ex-USA Index (Net) (USD)* 25.35% 7.59% 5.22% 60% MSCI World Index (Net)(Hedged)(USD) / 40% Bloomberg Global Aggregate Index (Hedged) (USD) 22.81% 8.67% 7.89% |
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 | $ 1,328,151,000 |
Holdings Count | Holding | 301 |
Advisory Fees Paid, Amount | $ 9,985 |
InvestmentCompanyPortfolioTurnover | 75% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $1,328,151 301 $9,985 75% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Warrant 0.0% Foreign Common Stock 0.0% Rights 0.0% Derivative Contracts (Net) 1.8% Sovereign Debt 7.1% U.S. Treasury Obligations 64.1% 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 U.S. Treasury Bills, 4.61%, 10/8/2024 8.3% U.S. Treasury Bills, 5.30%, 11/14/2024 8.0% U.S. Treasury Bills, 5.29%, 12/5/2024 6.7% U.S. Treasury Bills, 4.69%, 10/29/2024 4.5% U.S. Treasury Bills, 4.66%, 10/15/2024 3.8% U.S. Treasury Inflation Protected Securities, 0.13%, 1/15/2032 2.0% U.S. Treasury Inflation Protected Securities, 1.75%, 1/15/2034 2.0% U.S. Treasury Bills, 5.28%, 12/26/2024 2.0% U.S. Treasury Inflation Protected Securities, 1.38%, 7/15/2033 2.0% U.S. Treasury Inflation Protected Securities, 0.13%, 7/15/2031 1.9% |
Material Fund Change [Text Block] | Material Fund Changes PanAgora Asset Management Inc. was terminated as a sub-advisor to the Fund, and SIMC was added to directly manage a portion of the Fund’s assets during the reporting period. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports or upon request at 1-800-DIAL-SEI. |
C000147403 | |
Shareholder Report [Line Items] | |
Fund Name | Multi-Asset Accumulation Fund |
Class Name | Class Y |
Trading Symbol | SMOYX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the Multi-Asset Accumulation 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Multi-Asset Accumulation Fund, Class Y Shares $100 0.92% |
Expenses Paid, Amount | $ 100 |
Expense Ratio, Percent | 0.92% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares underperformed its benchmark, a hybrid of 60% MSCI World Index (Net) (USD Hedged) and 40% Bloomberg Global Aggregate Index (USD Hedged) for the 12-month period ending September 30, 2024. The Fund's underweight position in global equities detracted from performance for the reporting period, while its broad exposure to commodities and overweight allocation to global sovereign bonds, including global inflation-linked bonds, contributed to relative performance. Among the Fund’s sub-advisors, AQR Capital Management, LLC and PanAgora Asset Management Inc. underperformed the hybrid benchmark during the reporting period due mainly to their underweight allocations to global equities, which performed well, driven by resilient corporate earnings and improving economic sentiment, particularly in the U.S. Overweights to inflation-related assets and nominal bonds benefited both managers. Commodities saw mixed performance but generally ended the period with positive returns; energy prices declined, while precious metals outperformed. Nominal bonds benefited from the anticipation of interest-rate cuts by central banks, and, despite signs of moderating inflation, Treasury Inflation-Protected Securities (TIPS) were supported by attractive yields relative to nominal Treasuries. SEI Investments Management Corporation (SIMC) replaced PanAgora Asset Management Inc. after the sub-advisor was terminated late in the reporting period. SIMC’s performance was bolstered by inflation-related assets such as TIPS, and positions in commodities, which performed well in August and September, despite signs of moderating inflation. Derivatives had a significant impact on Fund performance for the reporting period. Sovereign bond index futures, interest-rate swaps, and sovereign bond total-return swaps produced positive returns as global interest rates declined. Developed and emerging-market equity futures contributed positively to performance. The Fund's strategic commodity exposure through futures and swaps also benefited performance. Forward-currency contracts on emerging-market currencies detracted from the Fund’s absolute and relative performance, while developed-market currency forward contracts, used to hedge foreign-currency risk against the U.S. dollar, had a positive impact for the period. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Multi-Asset Accumulation Fund, Class Y Shares - $143938 MSCI ACWI ex-USA Index (Net) (USD)* - $166302 60% MSCI World Index (Net)(Hedged)(USD) / 40% Bloomberg Global Aggregate Index (Hedged) (USD) - $213690 Sep/14 $100000 $100000 $100000 Sep/15 $96219 $87837 $100835 Sep/16 $107434 $95968 $110212 Sep/17 $112325 $114787 $121992 Sep/18 $115836 $116810 $131883 Sep/19 $129922 $115375 $140991 Sep/20 $132188 $118838 $151939 Sep/21 $150634 $147259 $177362 Sep/22 $119648 $110199 $153239 Sep/23 $122910 $132667 $174005 Sep/24 $143938 $166302 $213690 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Multi-Asset Accumulation Fund, Class Y Shares 17.11% 2.07% 3.71% MSCI ACWI ex-USA Index (Net) (USD ) Footnote Reference 25.35% 7.59% 5.22% 60% MSCI World Index (Net)(Hedged)(USD) / 40% Bloomberg Global Aggregate Index (Hedged) (USD) 22.81% 8.67% 7.89% |
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 | $ 1,328,151,000 |
Holdings Count | Holding | 301 |
Advisory Fees Paid, Amount | $ 9,985 |
InvestmentCompanyPortfolioTurnover | 75% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $1,328,151 301 $9,985 75% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Warrant 0.0% Foreign Common Stock 0.0% Rights 0.0% Derivative Contracts (Net) 1.8% Sovereign Debt 7.1% U.S. Treasury Obligations 64.1% 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 U.S. Treasury Bills, 4.61%, 10/8/2024 8.3% U.S. Treasury Bills, 5.30%, 11/14/2024 8.0% U.S. Treasury Bills, 5.29%, 12/5/2024 6.7% U.S. Treasury Bills, 4.69%, 10/29/2024 4.5% U.S. Treasury Bills, 4.66%, 10/15/2024 3.8% U.S. Treasury Inflation Protected Securities, 0.13%, 1/15/2032 2.0% U.S. Treasury Inflation Protected Securities, 1.75%, 1/15/2034 2.0% U.S. Treasury Bills, 5.28%, 12/26/2024 2.0% U.S. Treasury Inflation Protected Securities, 1.38%, 7/15/2033 2.0% U.S. Treasury Inflation Protected Securities, 0.13%, 7/15/2031 1.9% |
Material Fund Change [Text Block] | Material Fund Changes PanAgora Asset Management Inc. was terminated as a sub-advisor to the Fund, and SIMC was added to directly manage a portion of the Fund’s assets during the reporting period. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports or upon request at 1-800-DIAL-SEI. |
C000109625 | |
Shareholder Report [Line Items] | |
Fund Name | Multi-Asset Income Fund |
Class Name | Class F |
Trading Symbol | SIOAX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the Multi-Asset Income 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Multi-Asset Income Fund, Class F Shares $87 0.80% |
Expenses Paid, Amount | $ 87 |
Expense Ratio, Percent | 0.80% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares modestly outperformed its benchmark, a hybrid of 45% Bloomberg U.S. Aggregate Bond Index, 40% ICE BofA U.S. High Yield Constrained Index, and 15% MSCI ACWI Index (Net), for the 12-month period ending September 30, 2024. The Fund’s holdings in dividend-paying stocks enhanced performance for the reporting period. An overweight allocation to emerging-market debt also contributed to Fund performance, benefiting from lower financing costs as interest rates declined. Overweights to bank loans and collateralized loan obligations (CLOs) further boosted Fund performance. Default rates in the leveraged loan market remained low, supporting the performance of both bank loans and CLOs as they offered higher yields without significantly increased credit risk. SEI Investments Management Corporation, the Fund’s dividend equity manager, outperformed the hybrid benchmark for the reporting period, driven by healthy corporate earnings and improving economic sentiment. Among the Fund’s sub-advisors, Goldman Sachs Asset Management, L.P. benefited from an overweight allocation to emerging-market debt, which outperformed developed-market bonds over the reporting period. Western Asset Management Company underperformed the Fund’s benchmark, attributable to its underweight in high-yield debt, which outpaced investment-grade credit due to investor confidence in low default rates and healthy corporate balance sheets. Barings LLC outperformed after it was hired as a Fund sub-advisor in the second half of the period, and benefited from an overweight to the securitized sector (mainly asset-backed securities and commercial mortgage-backed securities). The Fund’s use of derivatives during the period included total-return swaps on bond futures, interest-rate swaps, futures and options on exchange-traded funds, equity indexes, credit default swaps, and currency forwards. These were employed for fixed-income relative value, option income-generation, and interest-rate risk hedging. Interest-rate futures benefited Fund performance as yields declined. Interest-rate swaps weighed on performance. Currency forwards and exposure to investment-grade credit and high-yield bonds through credit default swaps had a slightly positive effect on Fund performance. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Multi-Asset Income Fund, Class F Shares - $153741 Bloomberg U.S. Aggregate Bond Index (USD)* - $120044 45% Bloomberg U.S. Aggregate Bond Index / 40% ICE BofA U.S. High Yield Constrained Index / 15% MSCI ACWI (Net) - $159889 45% Bloomberg U.S. Aggregate Bond Index/ 40% ICE BofA U.S. High Yield Constrained Index/ 15% S&P 500 Index - $138238 Sep/14 $100000 $100000 $100000 $100000 Sep/15 $103331 $102941 $99870 $99870 Sep/16 $110961 $108286 $109697 $109697 Sep/17 $118615 $108364 $116600 $116600 Sep/18 $120466 $107047 $120329 $120329 Sep/19 $130456 $118068 $129956 $129956 Sep/20 $132880 $126315 $138596 $138596 Sep/21 $145599 $125184 $150138 $150138 Sep/22 $121977 $106908 $128583 $128583 Sep/23 $131903 $107597 $137710 $138238 Sep/24 $153741 $120044 $159889 $138238 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Multi-Asset Income Fund, Class F Shares 16.56% 3.34% 4.39% Bloomberg U.S. Aggregate Bond Index (USD)* 11.57% 0.33% 1.84% 45% Bloomberg U.S. Aggregate Bond Index / 40% ICE BofA U.S. High Yield Constrained Index / 15% MSCI ACWI (Net) 16.11% 4.23% 4.80% 45% Bloomberg U.S. Aggregate Bond Index/ 40% ICE BofA U.S. High Yield Constrained Index/ 15% S&P 500 Index 16.72% 4.42% 4.90% |
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 | $ 556,021,000 |
Holdings Count | Holding | 1,196 |
Advisory Fees Paid, Amount | $ 2,497 |
InvestmentCompanyPortfolioTurnover | 68% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $556,021 1,196 $2,497 68% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Derivative Contracts (Net) 0.0% Warrants 0.0% Municipal Bond 0.0% Utilities 0.2% Materials 0.3% Convertible Bonds 0.4% Real Estate 0.6% Industrials 0.7% Communication Services 1.0% Consumer Discretionary 1.2% Information Technology 1.2% Energy 1.8% U.S. Treasury Obligations 1.9% Health Care 2.9% Consumer Staples 3.0% Financials 4.2% Loan Participations 5.1% Sovereign Debt 8.7% Mortgage-Backed Securities 11.1% Asset-Backed Securities 12.6% Corporate Obligations 38.7% 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 U.S. Treasury Bills, 4.90%, 2/6/2025 1.1% U.S. Treasury Bills, 5.19%, 11/26/2024 0.8% AbbVie Inc 0.4% Oracle 0.4% Verizon Communications Inc 0.4% Johnson & Johnson 0.4% Altria Group Inc 0.4% Oversea-Chinese Banking Corp Ltd 0.4% Coca-Cola Co/The 0.4% Philip Morris International Inc 0.4% |
Material Fund Change [Text Block] | Material Fund Changes Barings LLC was added as a Fund sub-advisor during the reporting period. In the upcoming reporting period, Western Asset Management Company, LLC, Western Asset Management Company Limited and Western Asset Management Company PTE Ltd will be removed from the Fund. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports or upon request at 1-800-DIAL-SEI. |
C000147404 | |
Shareholder Report [Line Items] | |
Fund Name | Multi-Asset Income Fund |
Class Name | Class Y |
Trading Symbol | SLIYX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the Multi-Asset Income 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Multi-Asset Income Fund, Class Y Shares $76 0.70% |
Expenses Paid, Amount | $ 76 |
Expense Ratio, Percent | 0.70% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares modestly outperformed its benchmark, a hybrid of 45% Bloomberg U.S. Aggregate Bond Index, 40% ICE BofA U.S. High Yield Constrained Index, and 15% MSCI ACWI Index (Net), for the 12-month period ending September 30, 2024. The Fund’s holdings in dividend-paying stocks enhanced performance for the reporting period. An overweight allocation to emerging-market debt also contributed to Fund performance, benefiting from lower financing costs as interest rates declined. Overweights to bank loans and collateralized loan obligations (CLOs) further boosted Fund performance. Default rates in the leveraged loan market remained low, supporting the performance of both bank loans and CLOs as they offered higher yields without significantly increased credit risk. SEI Investments Management Corporation, the Fund’s dividend equity manager, outperformed the hybrid benchmark for the reporting period, driven by healthy corporate earnings and improving economic sentiment. Among the Fund’s sub-advisors, Goldman Sachs Asset Management, L.P. benefited from an overweight allocation to emerging-market debt, which outperformed developed-market bonds over the reporting period. Western Asset Management Company underperformed the Fund’s benchmark, attributable to its underweight in high-yield debt, which outpaced investment-grade credit due to investor confidence in low default rates and healthy corporate balance sheets. Barings LLC outperformed after it was hired as a Fund sub-advisor in the second half of the period, and benefited from an overweight to the securitized sector (mainly asset-backed securities and commercial mortgage-backed securities). The Fund’s use of derivatives during the period included total-return swaps on bond futures, interest-rate swaps, futures and options on exchange-traded funds, equity indexes, credit default swaps, and currency forwards. These were employed for fixed-income relative value, option income-generation, and interest-rate risk hedging. Interest-rate futures benefited Fund performance as yields declined. Interest-rate swaps weighed on performance. Currency forwards and exposure to investment-grade credit and high-yield bonds through credit default swaps had a slightly positive effect on Fund performance. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Multi-Asset Income Fund, Class Y Shares - $155214 Bloomberg U.S. Aggregate Bond Index (USD)* - $120044 45% Bloomberg U.S. Aggregate Bond Index / 40% ICE BofA U.S. High Yield Constrained Index / 15% MSCI ACWI (Net) - $159889 45% Bloomberg U.S. Aggregate Bond Index/ 40% ICE BofA U.S. High Yield Constrained Index/ 15% S&P 500 Index - $138238 Sep/14 $100000 $100000 $100000 $100000 Sep/15 $103399 $102941 $99870 $99870 Sep/16 $111139 $108286 $109697 $109697 Sep/17 $118923 $108364 $116600 $116600 Sep/18 $120901 $107047 $120329 $120329 Sep/19 $131045 $118068 $129956 $129956 Sep/20 $133613 $126315 $138596 $138596 Sep/21 $146553 $125184 $150138 $150138 Sep/22 $122899 $106908 $128583 $128583 Sep/23 $133034 $107597 $137710 $138238 Sep/24 $155214 $120044 $159889 $138238 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Multi-Asset Income Fund, Class Y Shares 16.67% 3.44% 4.49% Bloomberg U.S. Aggregate Bond Index (USD ) Footnote Reference 11.57% 0.33% 1.84% 45% Bloomberg U.S. Aggregate Bond Index / 40% ICE BofA U.S. High Yield Constrained Index / 15% MSCI ACWI (Net) 16.11% 4.23% 4.80% 45% Bloomberg U.S. Aggregate Bond Index/ 40% ICE BofA U.S. High Yield Constrained Index/ 15% S&P 500 Index 16.72% 4.42% 4.90% |
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 | $ 556,021,000 |
Holdings Count | Holding | 1,196 |
Advisory Fees Paid, Amount | $ 2,497 |
InvestmentCompanyPortfolioTurnover | 68% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $556,021 1,196 $2,497 68% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Derivative Contracts (Net) 0.0% Warrants 0.0% Municipal Bond 0.0% Utilities 0.2% Materials 0.3% Convertible Bonds 0.4% Real Estate 0.6% Industrials 0.7% Communication Services 1.0% Consumer Discretionary 1.2% Information Technology 1.2% Energy 1.8% U.S. Treasury Obligations 1.9% Health Care 2.9% Consumer Staples 3.0% Financials 4.2% Loan Participations 5.1% Sovereign Debt 8.7% Mortgage-Backed Securities 11.1% Asset-Backed Securities 12.6% Corporate Obligations 38.7% 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 U.S. Treasury Bills, 4.90%, 2/6/2025 1.1% U.S. Treasury Bills, 5.19%, 11/26/2024 0.8% AbbVie Inc 0.4% Oracle 0.4% Verizon Communications Inc 0.4% Johnson & Johnson 0.4% Altria Group Inc 0.4% Oversea-Chinese Banking Corp Ltd 0.4% Coca-Cola Co/The 0.4% Philip Morris International Inc 0.4% |
Material Fund Change [Text Block] | Material Fund Changes Barings LLC was added as a Fund sub-advisor during the reporting period. In the upcoming reporting period, Western Asset Management Company, LLC, Western Asset Management Company Limited and Western Asset Management Company PTE Ltd will be removed from the Fund. This is a summary of certain changes to the Fund as of September 30, 2024. For more complete information, you may review the Fund’s next prospectus, which we expect to be available by January 28, 2025, at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports or upon request at 1-800-DIAL-SEI. |
C000109626 | |
Shareholder Report [Line Items] | |
Fund Name | Multi-Asset Inflation Managed Fund |
Class Name | Class F |
Trading Symbol | SIFAX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the Multi-Asset Inflation Managed 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Multi-Asset Inflation Managed Fund, Class F Shares $196 1.90% |
Expenses Paid, Amount | $ 196 |
Expense Ratio, Percent | 1.90% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares underperformed its benchmark, a hybrid of 70% Bloomberg 1-5 Year U.S. TIPS Index, 20% Bloomberg Commodity Index, and 10% S&P 500 Index (Gross). The Fund’s underperformance over the reporting period was due mainly to its commodities exposure, which saw mixed performance. Precious metals, especially gold and silver, led other sectors due to demand for “safe-haven” investments, central bank purchases, and periods of U.S. dollar weakness. The energy sector lagged the overall market as oil and natural gas prices fell amid declining global demand and milder weather. The Fund’s equity long/short strategy detracted from performance as inflation moderated, with less inflation-sensitive sectors outperforming those with greater inflation-sensitivity. Holdings in the energy sector detracted from Fund performance due to pressured crude oil prices. Treasury Inflation-Protected Securities (TIPS) contributed positively to Fund performance, supported by expectations of Federal Reserve interest-rate cuts and stabilizing inflation, and improving yields versus U.S. Treasurys. Columbia Management Investment Advisers, LLC and Credit Suisse Asset Management, LLC (the Fund’s commodities sub-advisors) underperformed the Fund’s hybrid benchmark due to mixed performance for commodities. Franklin Advisers, Inc. (equity long/short sub-advisor) underperformed the benchmark as less inflation-sensitive sectors outperformed. AllianceBernstein L.P. outperformed, benefiting from its mandate’s overweight credit exposure amid tighter credit spreads, especially in below-investment-grade bonds. Regarding the use of derivatives during the reporting period, the Fund employed equity-index futures to hedge broad equity-market exposure; bond futures and interest-rate swaps for duration hedging; credit default swaps (CDS) to hedge credit risk; and commodity futures for diversified strategic commodities exposure. Commodity and bond futures contributed positively to Fund performance, while equity-index futures, interest-rate swaps, and CDS were detractors but provided intended hedging. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Multi-Asset Inflation Managed Fund, Class F Shares - $116167 Bloomberg U.S. Aggregate Bond Index (USD)* - $120044 Bloomberg 1-5 Year U.S. TIPS Index (70%)/Bloomberg Commodity Index Total Return Index (20%)/S&P 500 Index (10%) - $137184 Sep/14 $100000 $100000 $100000 Sep/15 $93184 $102941 $93804 Sep/16 $94168 $108286 $97014 Sep/17 $92222 $108364 $98739 Sep/18 $93184 $107047 $101501 Sep/19 $92608 $118068 $103324 Sep/20 $89448 $126315 $107305 Sep/21 $102609 $125184 $123264 Sep/22 $107841 $106908 $120929 Sep/23 $109411 $107597 $125649 Sep/24 $116167 $120044 $137184 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Multi-Asset Inflation Managed Fund, Class F Shares 6.18% 4.64% 1.51% Bloomberg U.S. Aggregate Bond Index (USD)* 11.57% 0.33% 1.84% Bloomberg 1-5 Year U.S. TIPS Index (70%)/Bloomberg Commodity Index Total Return Index (20%)/S&P 500 Index (10%) 9.18% 5.83% 3.21% |
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 | $ 580,285,000 |
Holdings Count | Holding | 1,502 |
Advisory Fees Paid, Amount | $ 2,068 |
InvestmentCompanyPortfolioTurnover | 43% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $580,285 1,502 $2,068 43% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Reverse Repurchase Agreement - Rights 0.0% Real Estate 0.1% Foreign Common Stock 0.1% Materials 0.1% Health Care 0.2% Sovereign Debt 0.2% Information Technology 0.3% Communication Services 0.5% Derivative Contracts (Net) 0.6% Utilities 0.7% Consumer Staples 0.8% Consumer Discretionary 0.8% Industrials 0.8% Energy 0.9% U.S. Government Agency Obligations 1.7% Financials 3.8% Asset-Backed Securities 4.1% Mortgage-Backed Securities 4.4% Common Stock 15.1% U.S. Treasury Obligations 62.3% 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 U.S. Treasury Inflation Protected Securities, 0.38%, 7/15/2027 25.7% U.S. Treasury Inflation Protected Securities, 0.75%, 7/15/2028 11.1% U.S. Treasury Inflation Protected Securities, 0.25%, 7/15/2029 7.0% Exxon Mobil Corp 1.9% U.S. Treasury Notes, 4.80%, 1/31/2026 1.7% U.S. Treasury Notes, 4.72%, 4/30/2025 1.2% U.S. Treasury Bills, 5.30%, 11/14/2024 1.2% U.S. Treasury Bills, 5.24%, 11/21/2024 1.2% U.S. Treasury Bills, 4.60%, 11/29/2024 1.2% U.S. Treasury Notes, 4.72%, 10/31/2025 1.2% |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000147405 | |
Shareholder Report [Line Items] | |
Fund Name | Multi-Asset Inflation Managed Fund |
Class Name | Class Y |
Trading Symbol | SLFYX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the Multi-Asset Inflation Managed 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Multi-Asset Inflation Managed Fund, Class Y Shares $169 1.64% |
Expenses Paid, Amount | $ 169 |
Expense Ratio, Percent | 1.64% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares underperformed its benchmark, a hybrid of 70% Bloomberg 1-5 Year U.S. TIPS Index, 20% Bloomberg Commodity Index, and 10% S&P 500 Index (Gross). The Fund’s underperformance over the reporting period was due mainly to its commodities exposure, which saw mixed performance. Precious metals, especially gold and silver, led other sectors due to demand for “safe-haven” investments, central bank purchases, and periods of U.S. dollar weakness. The energy sector lagged the overall market as oil and natural gas prices fell amid declining global demand and milder weather. The Fund’s equity long/short strategy detracted from performance as inflation moderated, with less inflation-sensitive sectors outperforming those with greater inflation-sensitivity. Holdings in the energy sector detracted from Fund performance due to pressured crude oil prices. Treasury Inflation-Protected Securities (TIPS) contributed positively to Fund performance, supported by expectations of Federal Reserve interest-rate cuts and stabilizing inflation, and improving yields versus U.S. Treasurys. Columbia Management Investment Advisers, LLC and Credit Suisse Asset Management, LLC (the Fund’s commodities sub-advisors) underperformed the Fund’s hybrid benchmark due to mixed performance for commodities. Franklin Advisers, Inc. (equity long/short sub-advisor) underperformed the benchmark as less inflation-sensitive sectors outperformed. AllianceBernstein L.P. outperformed, benefiting from its mandate’s overweight credit exposure amid tighter credit spreads, especially in below-investment-grade bonds. Regarding the use of derivatives during the reporting period, the Fund employed equity-index futures to hedge broad equity-market exposure; bond futures and interest-rate swaps for duration hedging; credit default swaps (CDS) to hedge credit risk; and commodity futures for diversified strategic commodities exposure. Commodity and bond futures contributed positively to Fund performance, while equity-index futures, interest-rate swaps, and CDS were detractors but provided intended hedging. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Multi-Asset Inflation Managed Fund, Class Y Shares - $119045 Bloomberg U.S. Aggregate Bond Index (USD)* - $120044 Bloomberg 1-5 Year U.S. TIPS Index (70%)/Bloomberg Commodity Index Total Return Index (20%)/S&P 500 Index (10%) - $137184 Sep/14 $100000 $100000 $100000 Sep/15 $93397 $102941 $93804 Sep/16 $94609 $108286 $97014 Sep/17 $92811 $108364 $98739 Sep/18 $94009 $107047 $101501 Sep/19 $93677 $118068 $103324 Sep/20 $90708 $126315 $107305 Sep/21 $104302 $125184 $123264 Sep/22 $109890 $106908 $120929 Sep/23 $111812 $107597 $125649 Sep/24 $119045 $120044 $137184 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Multi-Asset Inflation Managed Fund, Class Y Shares 6.47% 4.91% 1.76% Bloomberg U.S. Aggregate Bond Index (USD ) Footnote Reference 11.57% 0.33% 1.84% Bloomberg 1-5 Year U.S. TIPS Index (70%)/Bloomberg Commodity Index Total Return Index (20%)/S&P 500 Index (10%) 9.18% 5.83% 3.21% |
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 | $ 580,285,000 |
Holdings Count | Holding | 1,502 |
Advisory Fees Paid, Amount | $ 2,068 |
InvestmentCompanyPortfolioTurnover | 43% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $580,285 1,502 $2,068 43% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Reverse Repurchase Agreement - Rights 0.0% Real Estate 0.1% Foreign Common Stock 0.1% Materials 0.1% Health Care 0.2% Sovereign Debt 0.2% Information Technology 0.3% Communication Services 0.5% Derivative Contracts (Net) 0.6% Utilities 0.7% Consumer Staples 0.8% Consumer Discretionary 0.8% Industrials 0.8% Energy 0.9% U.S. Government Agency Obligations 1.7% Financials 3.8% Asset-Backed Securities 4.1% Mortgage-Backed Securities 4.4% Common Stock 15.1% U.S. Treasury Obligations 62.3% 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 U.S. Treasury Inflation Protected Securities, 0.38%, 7/15/2027 25.7% U.S. Treasury Inflation Protected Securities, 0.75%, 7/15/2028 11.1% U.S. Treasury Inflation Protected Securities, 0.25%, 7/15/2029 7.0% Exxon Mobil Corp 1.9% U.S. Treasury Notes, 4.80%, 1/31/2026 1.7% U.S. Treasury Notes, 4.72%, 4/30/2025 1.2% U.S. Treasury Bills, 5.30%, 11/14/2024 1.2% U.S. Treasury Bills, 5.24%, 11/21/2024 1.2% U.S. Treasury Bills, 4.60%, 11/29/2024 1.2% U.S. Treasury Notes, 4.72%, 10/31/2025 1.2% |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000109627 | |
Shareholder Report [Line Items] | |
Fund Name | Multi-Asset Capital Stability Fund |
Class Name | Class F |
Trading Symbol | SCLAX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class F Shares of the Multi-Asset Capital Stability 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Multi-Asset Capital Stability Fund, Class F Shares $65 0.62% |
Expenses Paid, Amount | $ 65 |
Expense Ratio, Percent | 0.62% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class F Shares outperformed its blended benchmark (95% Bloomberg 1-3 Year U.S. Government/Credit Index /5% S&P 500 Index) for the 12 months ending September 30, 2024, with positive absolute performance meeting mandate expectations. An overweight allocation to global equities enhanced Fund performance for the reporting period. Equities were the top-performing asset class over the period. A tactical U.S. Treasury Inflation-Protected Securities (TIPS) overweight benefited Fund performance, supported by Federal Reserve rate-cut expectations and improved real yields versus nominal Treasurys. An underweight to nominal bonds detracted from performance, as returns on cash (the Fund's primary risk-mitigation asset) lagged those of major developed bond markets. Among the Fund’s sub-advisors, Janus Henderson Investors US LLC (Janus) and AllianceBernstein L.P. (AllianceBernstein) outperformed the hybrid benchmark over the reporting period. Both managers benefited from overweights to equities, driven by strong corporate earnings, improving economic sentiment, and innovations such as artificial intelligence (AI) fueling market growth, especially in the U.S. AllianceBernstein was bolstered by its overweight to TIPS, which benefited from attractive real yields. Both Janus and AllianceBernstein were challenged by underweights to U.S. Treasurys, which outperformed cash as bond yields moderated during the period. During the reporting period, the Fund employed various derivatives: credit-default swaps, equity-index futures, bond-index futures, interest-rate swaps, equity options, interest-rate swaptions, and currency forwards. Stock index futures in developed-market equities contributed positively to performance, while interest-rate futures and swaps benefited as global rates generally declined. Fund performance also benefited from small credit-default swap positions in high-yield and investment-grade credit, as well as forward-currency contracts on developed-market currencies, used to hedge foreign-currency risk against the U.S. dollar. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Multi-Asset Capital Stability Fund, Class F Shares - $127784 Bloomberg U.S. Aggregate Bond Index (USD)* - $120044 95% Bloomberg 1-3 Year U.S. Government/Credit Index / 5% S&P 500 Index - $125022 Sep/14 $100000 $100000 $100000 Sep/15 $100571 $102941 $101127 Sep/16 $102052 $108286 $103161 Sep/17 $103872 $108364 $104714 Sep/18 $105686 $107047 $105810 Sep/19 $109851 $118068 $110786 Sep/20 $112650 $126315 $115665 Sep/21 $116337 $125184 $117588 Sep/22 $111402 $106908 $111086 Sep/23 $116075 $107597 $115199 Sep/24 $127784 $120044 $125022 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Multi-Asset Capital Stability Fund, Class F Shares 10.09% 3.07% 2.48% Bloomberg U.S. Aggregate Bond Index (USD)* 11.57% 0.33% 1.84% 95% Bloomberg 1-3 Year U.S. Government/Credit Index / 5% S&P 500 Index 8.53% 2.45% 2.26% |
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 | $ 507,841,000 |
Holdings Count | Holding | 305 |
Advisory Fees Paid, Amount | $ 1,943 |
InvestmentCompanyPortfolioTurnover | 203% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $507,841 305 $1,943 203% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Derivative Contracts (Net) 0.8% Common Stock 0.9% Cash Collateral 1.0% Registered Investment Companies 1.2% U.S. Government Agency Obligations 2.3% Sovereign Debt 15.3% Commercial Paper 36.2% U.S. Treasury Obligations 40.5% 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 U.S. Treasury Bills, 5.23%, 10/24/2024 15.7% Japan Treasury Discount Bill 15.3% U.S. Treasury Bills, 5.18%, 10/31/2024 8.7% Intesa Sanpaolo 1.9% Brookfield Infrastructure 1.9% Becton, Dickinson and Company 1.9% DENTSPLY SIRONA Inc 1.9% Glencore plc 1.9% Oglethorpe Power 1.9% U.S. Treasury Bills, 5.27%, 10/10/2024 1.9% |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |
C000147406 | |
Shareholder Report [Line Items] | |
Fund Name | Multi-Asset Capital Stability Fund |
Class Name | Class Y |
Trading Symbol | SMLYX |
Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Class Y Shares of the Multi-Asset Capital Stability 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://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at 610-676-1000. |
Additional Information Phone Number | 610-676-1000 |
Additional Information Website | https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports |
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 Multi-Asset Capital Stability Fund, Class Y Shares $55 0.52% |
Expenses Paid, Amount | $ 55 |
Expense Ratio, Percent | 0.52% |
Factors Affecting Performance [Text Block] | How did the Fund perform in the last year? Class Y Shares outperformed its blended benchmark (95% Bloomberg 1-3 Year U.S. Government/Credit Index /5% S&P 500 Index) for the 12 months ending September 30, 2024, with positive absolute performance meeting mandate expectations. An overweight allocation to global equities enhanced Fund performance for the reporting period. Equities were the top-performing asset class over the period. A tactical U.S. Treasury Inflation-Protected Securities (TIPS) overweight benefited Fund performance, supported by Federal Reserve rate-cut expectations and improved real yields versus nominal Treasurys. An underweight to nominal bonds detracted from performance, as returns on cash (the Fund's primary risk-mitigation asset) lagged those of major developed bond markets. Among the Fund’s sub-advisors, Janus Henderson Investors US LLC (Janus) and AllianceBernstein L.P. (AllianceBernstein) outperformed the hybrid benchmark over the reporting period. Both managers benefited from overweights to equities, driven by strong corporate earnings, improving economic sentiment, and innovations such as artificial intelligence (AI) fueling market growth, especially in the U.S. AllianceBernstein was bolstered by its overweight to TIPS, which benefited from attractive real yields. Both Janus and AllianceBernstein were challenged by underweights to U.S. Treasurys, which outperformed cash as bond yields moderated during the period. During the reporting period, the Fund employed various derivatives: credit-default swaps, equity-index futures, bond-index futures, interest-rate swaps, equity options, interest-rate swaptions, and currency forwards. Stock index futures in developed-market equities contributed positively to performance, while interest-rate futures and swaps benefited as global rates generally declined. Fund performance also benefited from small credit-default swap positions in high-yield and investment-grade credit, as well as forward-currency contracts on developed-market currencies, used to hedge foreign-currency risk against the U.S. dollar. |
Performance Past Does Not Indicate Future [Text] | Past performance is not indicative of future performance. |
Line Graph [Table Text Block] | Multi-Asset Capital Stability Fund, Class Y Shares - $129145 Bloomberg U.S. Aggregate Bond Index (USD)* - $120044 95% Bloomberg 1-3 Year U.S. Government/Credit Index / 5% S&P 500 Index - $125022 Sep/14 $100000 $100000 $100000 Sep/15 $100670 $102941 $101127 Sep/16 $102252 $108286 $103161 Sep/17 $104170 $108364 $104714 Sep/18 $106091 $107047 $105810 Sep/19 $110380 $118068 $110786 Sep/20 $113297 $126315 $115665 Sep/21 $117223 $125184 $117588 Sep/22 $112269 $106908 $111086 Sep/23 $117094 $107597 $115199 Sep/24 $129145 $120044 $125022 |
Average Annual Return [Table Text Block] | Average Annual Total Returns as of September 30, 2024 Fund/Index Name 1 Year 5 Years 10 Years Multi-Asset Capital Stability Fund, Class Y Shares 10.29% 3.19% 2.59% Bloomberg U.S. Aggregate Bond Index (USD ) Footnote Reference 11.57% 0.33% 1.84% 95% Bloomberg 1-3 Year U.S. Government/Credit Index / 5% S&P 500 Index 8.53% 2.45% 2.26% |
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 | $ 507,841,000 |
Holdings Count | Holding | 305 |
Advisory Fees Paid, Amount | $ 1,943 |
InvestmentCompanyPortfolioTurnover | 203% |
Additional Fund Statistics [Text Block] | Key Fund Statistics as of September 30, 2024 Total Net Assets (000's) Number of Holdings Total Advisory Fees Paid (000's) Portfolio Turnover Rate $507,841 305 $1,943 203% |
Holdings [Text Block] | Asset Weightings Footnote Reference Value Value Derivative Contracts (Net) 0.8% Common Stock 0.9% Cash Collateral 1.0% Registered Investment Companies 1.2% U.S. Government Agency Obligations 2.3% Sovereign Debt 15.3% Commercial Paper 36.2% U.S. Treasury Obligations 40.5% 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 U.S. Treasury Bills, 5.23%, 10/24/2024 15.7% Japan Treasury Discount Bill 15.3% U.S. Treasury Bills, 5.18%, 10/31/2024 8.7% Intesa Sanpaolo 1.9% Brookfield Infrastructure 1.9% Becton, Dickinson and Company 1.9% DENTSPLY SIRONA Inc 1.9% Glencore plc 1.9% Oglethorpe Power 1.9% U.S. Treasury Bills, 5.27%, 10/10/2024 1.9% |
Material Fund Change [Text Block] | Material Fund Changes There were no material changes during the reporting period. |