The bar chart and the performance table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for the past ten calendar years and by showing how the Fund's average annual returns for 1, 5 and 10 years, and since the Fund's inception, compared with those of a broad measure of market performance. The performance information shown is based on full calendar years. The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. For current performance information, please call 1-800-DIAL-SEI.

Performance Information Illustrates Variability of Returns [Text]

The bar chart and the performance table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for the past ten calendar years and by showing how the Fund's average annual returns for 1, 5 and 10 years, and since the Fund's inception, compared with those of a broad measure of market performance.

Bar Chart Closing [Text Block]

Best Quarter: 2.73% (06/30/20)
Worst Quarter: -1.63% (03/31/20)
The Fund's Class F total return (pre-tax) from January 1, 2026 to March 31, 2026 was 0.55%.

Bar Chart, Year to Date Return

0.55%

Highest Quarterly Return, Label [Optional Text]

Best Quarter:

Highest Quarterly Return, Date

Jun. 30, 2020

Lowest Quarterly Return

(1.63%)

Performance Table Heading

Average Annual Total Returns (for the periods ended December 31, 2025)

Performance Table Uses Highest Federal Rate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance [Table]

Ultra Short Duration Bond Fund — Class F	1 Year			5 Years			10 Years			Since Inception (9/28/1993)
Fund Return Before Taxes		4.75	%		3.00	%		2.48	%		2.99	%
Fund Return After Taxes on Distributions		2.96	%		1.77	%		1.50	%		1.75	%
Fund Return After Taxes on Distributions and Sale of Fund Shares		2.79	%		1.76	%		1.47	%		1.78	%
Bloomberg U.S. Aggregate Bond Index (TR) (USD) (reflects no deductions for fees, expenses or taxes)		7.30	%		-0.36	%		2.01	%		4.35	%
Bloomberg Short U.S. Treasury 9-12 Month Index Return (reflects no deduction for fees, expenses or taxes)		4.40	%		2.78	%		2.18	%		3.50	%

Performance Availability Phone [Text]

1-800-DIAL-SEI

Prospectus [Line Items]

Performance Narrative [Text Block]

The bar chart and the performance table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for the past ten calendar years and by showing how the Fund's average annual returns for 1, 5 and 10 years, and since the Fund's inception, compared with those of a broad measure of market performance. The performance information shown is based on full calendar years. The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. For current performance information, please call 1-800-DIAL-SEI.

Performance Information Illustrates Variability of Returns [Text]

The bar chart and the performance table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for the past ten calendar years and by showing how the Fund's average annual returns for 1, 5 and 10 years, and since the Fund's inception, compared with those of a broad measure of market performance.

Bar Chart Closing [Text Block]

Best Quarter: 3.08% (09/30/24)
Worst Quarter: -2.55% (03/31/22)
The Fund's Class F total return (pre-tax) from January 1, 2026 to March 31, 2026 was 0.22%.

Bar Chart, Year to Date Return

0.22%

Highest Quarterly Return, Label [Optional Text]

Best Quarter:

Highest Quarterly Return, Date

Sep. 30, 2024

Lowest Quarterly Return

(2.55%)

Performance Table Heading

Average Annual Total Returns (for the periods ended December 31, 2025)

Performance Table Uses Highest Federal Rate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance [Table]

Short-Duration Government Fund — Class F	1 Year			5 Years			Since 10 Years			Inception (2/17/1987)
Fund Return Before Taxes		5.19	%		1.68	%		1.77	%		3.89	%
Fund Return After Taxes on Distributions		3.79	%		0.74	%		0.97	%		2.49	%
Fund Return After Taxes on Distributions and Sale of Fund Shares		3.05	%		0.87	%		1.00	%		2.48	%
Bloomberg U.S. Aggregate Bond Index (TR) (USD) (reflects no deductions for fees, expenses or taxes)		7.30	%		-0.36	%		2.01	%		5.26	%*
ICE BofA 1-3 Year U.S. Treasury Index Return (reflects no deduction for fees, expenses or taxes)		5.09	%		1.79	%		1.85	%		4.01	%

*Benchmark returns since inception do not include the return for the partial month following inception date of the Fund (2/17/1987 — 2/28/1987). Annualization calculation of the inception to date returns is based on the actual inception date (2/17/1987).

Performance Availability Phone [Text]

1-800-DIAL-SEI

Prospectus [Line Items]

Performance Narrative [Text Block]

The bar chart and the performance table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for the past ten calendar years and by showing how the Fund's average annual returns for 1, 5 and 10 years, and since the Fund's inception, compared with those of a broad measure of market performance. The performance information shown is based on full calendar years. The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. For current performance information, please call 1-800-DIAL-SEI.

Performance Information Illustrates Variability of Returns [Text]

The bar chart and the performance table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for the past ten calendar years and by showing how the Fund's average annual returns for 1, 5 and 10 years, and since the Fund's inception, compared with those of a broad measure of market performance.

Bar Chart Closing [Text Block]

Best Quarter: 6.65% (12/31/23)
Worst Quarter: -5.10% (09/30/22)
The Fund's Class F total return (pre-tax) from January 1, 2026 to March 31, 2026 was 0.69%.

Bar Chart, Year to Date Return

0.69%

Highest Quarterly Return, Label [Optional Text]

Best Quarter:

Highest Quarterly Return, Date

Dec. 31, 2023

Lowest Quarterly Return

(5.10%)

Performance Table Heading

Average Annual Total Returns (for the periods ended December 31, 2025)

Performance Table Uses Highest Federal Rate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance [Table]

GNMA Fund — Class F	1 Year			5 Years			10 Years			Since Inception (3/20/1987)
Fund Return Before Taxes		7.13	%		-0.15	%		1.20	%		4.87	%
Fund Return After Taxes on Distributions		5.69	%		-1.24	%		0.07	%		3.00	%
Fund Return After Taxes on Distributions and Sale of Fund Shares		4.20	%		-0.59	%		0.43	%		3.05	%
Bloomberg U.S. Aggregate Bond Index (TR) (USD) (reflects no deduction for fees, expenses or taxes)		7.30	%		-0.36	%		2.01	%		5.29	%*
Bloomberg GNMA Index Return (reflects no deduction for fees, expenses or taxes)		8.08	%		0.23	%		1.50	%		5.21	%

* Benchmark returns since inception do not include the return for the partial month following inception date of the Fund (3/20/1987 — 3/31/1987). Annualization calculation of the inception to date returns is based on the actual inception date (3/20/1987).

Performance Availability Phone [Text]

1-800-DIAL-SEI

Prospectus [Line Items]

Performance Narrative [Text Block]

The bar chart and the performance table below provide some indication of the risks of investing in the Class Y shares of the Fund by showing changes in the Fund's performance from year to year for the past ten calendar years and by showing how the Fund's average annual returns for 1, 5 and 10 years, and since the Fund's inception, compared with those of a broad measure of market performance. The performance information shown is based on full calendar years.

The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. For current performance information, please call 1-800-DIAL-SEI.

Performance Information Illustrates Variability of Returns [Text]

The bar chart and the performance table below provide some indication of the risks of investing in the Class Y shares of the Fund by showing changes in the Fund's performance from year to year for the past ten calendar years and by showing how the Fund's average annual returns for 1, 5 and 10 years, and since the Fund's inception, compared with those of a broad measure of market performance.

Bar Chart Closing [Text Block]

Best Quarter: 2.75% (06/30/20)
Worst Quarter: -1.61% (03/31/20)
The Fund's Class Y total return (pre-tax) from January 1, 2026 to March 31, 2026 was 0.57%.

Bar Chart, Year to Date Return

0.57%

Highest Quarterly Return, Label [Optional Text]

Best Quarter:

Highest Quarterly Return, Date

Jun. 30, 2020

Lowest Quarterly Return

(1.61%)

Performance Table Heading

Average Annual Total Returns (for the periods ended December 31, 2025)

Performance Table Uses Highest Federal Rate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance [Table]

Ultra Short Duration Bond Fund*	1 Year			5 Years			10 Years			Since Inception (9/28/1993)
Fund Return Before Taxes		4.83	%		3.08	%		2.56	%		3.02	%
Fund Return After Taxes on Distributions		3.01	%		1.81	%		1.55	%		1.76	%
Fund Return After Taxes on Distributions and Sale of Fund Shares		2.84	%		1.81	%		1.52	%		1.80	%
Bloomberg U.S. Aggregate Bond Index (TR) (USD) (reflects no deductions for fees, expenses or taxes)		7.30	%		-0.36	%		2.01	%		4.35	%
Bloomberg Short U.S. Treasury 9-12 Month Index Return (reflects no deduction for fees, expenses or taxes)		4.40	%		2.78	%		2.18	%		3.50	%

* The Fund's Class Y shares commenced operations on August 31, 2015. For periods prior to August 31, 2015, the performance of the Fund's Class F shares has been used. Returns for Class Y shares would have been substantially similar to those of Class F shares and would have differed only to the extent that Class Y shares have lower total annual fund operating expenses than Class F shares.

Performance Availability Phone [Text]

1-800-DIAL-SEI

Prospectus [Line Items]

Performance Narrative [Text Block]

The bar chart and the performance table below provide some indication of the risks of investing in the Class Y shares of the Fund by showing changes in the Fund's performance from year to year for the past ten calendar years and by showing how the Fund's average annual returns for 1, 5 and 10 years, and since the Fund's inception, compared with those of a broad measure of market performance. The performance information shown is based on full calendar years.

The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. For current performance information, please call 1-800-DIAL-SEI.

Performance Information Illustrates Variability of Returns [Text]

The bar chart and the performance table below provide some indication of the risks of investing in the Class Y shares of the Fund by showing changes in the Fund's performance from year to year for the past ten calendar years and by showing how the Fund's average annual returns for 1, 5 and 10 years, and since the Fund's inception, compared with those of a broad measure of market performance.

Bar Chart Closing [Text Block]

Best Quarter: 3.02% (9/30/24)
Worst Quarter: -2.51% (03/31/22)
The Fund's Class Y total return (pre-tax) from January 1, 2026 to March 31, 2026 was 0.26%.

Bar Chart, Year to Date Return

0.26%

Highest Quarterly Return, Label [Optional Text]

Best Quarter:

Highest Quarterly Return, Date

Sep. 30, 2024

Lowest Quarterly Return

(2.51%)

Performance Table Heading

Average Annual Total Returns (for the periods ended December 31, 2025)

Performance Table Uses Highest Federal Rate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance [Table]

Short-Duration Government Fund*	1 Year			5 Years			10 Years			Since Inception (2/17/1987)
Fund Return Before Taxes		5.34	%		1.84	%		1.93	%		3.93	%
Fund Return After Taxes on Distributions		3.88	%		0.84	%		1.07	%		2.51	%
Fund Return After Taxes on Distributions and Sale of Fund Shares		3.14	%		0.97	%		1.10	%		2.50	%
Bloomberg U.S. Aggregate Bond Index (TR) (USD) (reflects no deductions for fees, expenses or taxes)		7.30	%		-0.36	%		2.01	%		5.26	%**
ICE BofA 1-3 Year U.S. Treasury Index Return (reflects no deduction for fees, expenses or taxes)		5.09	%		1.79	%		1.85	%		4.01	%

* The Fund's Class Y shares commenced operations on December 31, 2014. For periods prior to December 31, 2014, the performance of the Fund's Class F shares has been used. Returns for Class Y shares would have been substantially similar to those of Class F shares and would have differed only to the extent that Class Y shares have lower total annual fund operating expenses than Class F shares.

** Benchmark returns since inception do not include the return for the partial month following inception date of the Fund (2/17/1987 — 2/28/1987). Annualization calculation of the inception to date returns is based on the actual inception date (2/17/1987).

Performance Availability Phone [Text]

1-800-DIAL-SEI

Prospectus [Line Items]

Performance Narrative [Text Block]

The bar chart and the performance table below provide some indication of the risks of investing in the Class Y shares of the Fund by showing changes in the Fund's performance from year to year for the past ten calendar years and by showing how the Fund's average annual returns for 1, 5 and 10 years, and since the Fund's inception, compared with those of a broad measure of market performance. The performance information shown is based on full calendar years. The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. For current performance information, please call 1-800-DIAL-SEI.

Performance Information Illustrates Variability of Returns [Text]

The bar chart and the performance table below provide some indication of the risks of investing in the Class Y shares of the Fund by showing changes in the Fund's performance from year to year for the past ten calendar years and by showing how the Fund's average annual returns for 1, 5 and 10 years, and since the Fund's inception, compared with those of a broad measure of market performance.

Bar Chart Closing [Text Block]

Best Quarter: 6.71% (12/31/23)
Worst Quarter: -5.04% (09/30/22)
The Fund's Class Y total return (pre-tax) from January 1, 2026 to March 31, 2026 was 0.76%.

Bar Chart, Year to Date Return

0.76%

Highest Quarterly Return, Label [Optional Text]

Best Quarter:

Highest Quarterly Return, Date

Dec. 31, 2023

Lowest Quarterly Return

(5.04%)

Performance Table Heading

Average Annual Total Returns (for the periods ended December 31, 2025)

Performance Table Uses Highest Federal Rate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance [Table]

GNMA Fund*	1 Year			5 Years			10 Years			Since Inception (3/20/1987)
Fund Return Before Taxes		7.40	%		0.10	%		1.45	%		4.94	%
Fund Return After Taxes on Distributions		5.84	%		-1.09	%		0.21	%		3.04	%
Fund Return After Taxes on Distributions and Sale of Fund Shares		4.36	%		-0.44	%		0.57	%		3.08	%
Bloomberg U.S. Aggregate Bond Index (TR) (USD) (reflects no deduction for fees, expenses or taxes)		7.30	%		-0.36	%		2.01	%		5.29	%**
Bloomberg GNMA Index Return (reflects no deduction for fees, expenses or taxes)		8.08	%		0.23	%		1.50	%		5.21	%

* The Fund's Class Y shares commenced operations on October 30, 2015. For periods prior to October 30, 2015, the performance of the Fund's Class F shares has been used. Returns for the Class Y shares would have been substantially similar to those of Class F shares and would have differed only to the extent that Class Y shares have lower total annual fund operating expenses than Class F shares.

** Benchmark returns since inception do not include the return for the partial month following inception date of the Fund (3/20/1987 — 3/31/1987). Annualization calculation of the inception to date returns is based on the actual inception date (3/20/1987).

Performance Availability Phone [Text]

1-800-DIAL-SEI

Prospectus [Line Items]

Performance Narrative [Text Block]

The bar chart and the performance table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for the past ten calendar years and by showing the Fund's average annual returns for 1, 5 and 10 years, and since the Fund's inception. The performance information shown is based on full calendar years. The Fund's past performance is not necessarily an indication of how the Fund will perform in the future. For current performance information, please call 1-800-DIAL-SEI.

Performance Information Illustrates Variability of Returns [Text]

The bar chart and the performance table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for the past ten calendar years and by showing the Fund's average annual returns for 1, 5 and 10 years, and since the Fund's inception.

Bar Chart Closing [Text Block]

Best Quarter: 1.32% (12/31/23)
Worst Quarter: 0.00% (03/31/21)
The Fund's Class F total return from January 1,2026 to March 31,2026 was 0.87%.

Bar Chart, Year to Date Return

0.87%

Highest Quarterly Return, Label [Optional Text]

Best Quarter:

Highest Quarterly Return, Date

Dec. 31, 2023

Lowest Quarterly Return

none

Performance Table Heading

Average Annual Total Returns (for the periods ended December 31, 2025)

Performance Table Closing [Text Block]

Please call 1-800-DIAL-SEI to obtain the Fund's current 7-day yield. Additional information about SEI's money market funds is available on our website at http://www.seic.com/holdings.

Performance Availability Phone [Text]

1-800-DIAL-SEI

Prospectus [Line Items]

Performance Narrative [Text Block]

The bar chart and the performance table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for the past ten calendar years and by showing the Fund's average annual returns for 1, 5 and 10 years, and since the Fund's inception. The performance information shown is based on full calendar years. The Fund's past performance is not necessarily an indication of how the Fund will perform in the future. For current performance information, please call 1-800-DIAL-SEI.

Performance Information Illustrates Variability of Returns [Text]

The bar chart and the performance table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for the past ten calendar years and by showing the Fund's average annual returns for 1, 5 and 10 years, and since the Fund's inception.

Bar Chart Closing [Text Block]

Best Quarter: 1.32% (12/31/23)
Worst Quarter: 0.00% (03/31/21)
The Fund's Class F total return from January 1, 2026 to
March 31, 2026 was 0.87%.

Bar Chart, Year to Date Return

0.87%

Highest Quarterly Return, Label [Optional Text]

Best Quarter:

Highest Quarterly Return, Date

Dec. 31, 2023

Lowest Quarterly Return

none

Performance Table Heading

Average Annual Total Returns (for the periods ended December 31, 2025)

Performance Table Closing [Text Block]

Please call 1-800-DIAL-SEI to obtain the Fund's current 7-day yield. Additional information about SEI's money market funds is available on our website at http://www.seic.com/holdings.

Performance Availability Phone [Text]

1-800-DIAL-SEI

Prospectus [Line Items]

Performance Narrative [Text Block]

The bar chart and the performance table below provide some indication of the risks of investing in the Admin Class shares of the Fund by showing changes in the Fund's performance from year to year for the past ten calendar years and by showing the Fund's average annual returns for 1, 5 and 10 years, and since the Fund's inception. The performance information shown is based on full calendar years. The Fund's past performance is not necessarily an indication of how the Fund will perform in the future. For current performance information, please call 1-800-DIAL-SEI.

Performance Information Illustrates Variability of Returns [Text]

The bar chart and the performance table below provide some indication of the risks of investing in the Admin Class shares of the Fund by showing changes in the Fund's performance from year to year for the past ten calendar years and by showing the Fund's average annual returns for 1, 5 and 10 years, and since the Fund's inception.

Bar Chart Closing [Text Block]

Best Quarter: 1.25% (12/31/23)
Worst Quarter: 0.00% (03/31/21)
The Fund's Admin Class total return from January 1, 2026 to March 31, 2026 was 0.82%.

Bar Chart, Year to Date Return

0.82%

Highest Quarterly Return, Label [Optional Text]

Best Quarter:

Highest Quarterly Return, Date

Dec. 31, 2023

Lowest Quarterly Return

none

Performance Table Heading

Average Annual Total Returns (for the periods ended December 31, 2025)

Performance Table Closing [Text Block]

Please call 1-800-DIAL-SEI to obtain the Fund's current 7-day yield. Additional information about SEI's money market funds is available on our website at http://www.seic.com/holdings.

Performance Availability Phone [Text]

1-800-DIAL-SEI

Prospectus [Line Items]

Performance Narrative [Text Block]

The bar chart and the performance table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for the past ten calendar years and by showing the Fund's average annual returns for 1, 5 and 10 years, and since the Fund's inception. The performance information shown is based on full calendar years. The Fund's past performance is not necessarily an indication of how the Fund will perform in the future. For current performance information, please call 1-800-DIAL-SEI.

Performance Information Illustrates Variability of Returns [Text]

The bar chart and the performance table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for the past ten calendar years and by showing the Fund's average annual returns for 1, 5 and 10 years, and since the Fund's inception.

Bar Chart, Reason Selected Class Different from Immediately Preceding Period [Text]

Because Admin Class shares are invested in the same portfolio of securities, returns for Admin Class shares would have been substantially similar to those of Institutional shares, shown here, and would have differed only to the extent that Admin Class shares, for certain years, have higher total annual fund operating expenses than Institutional shares.

Bar Chart Closing [Text Block]

Best Quarter: 1.24% (09/30/24)
Worst Quarter: 0.94% (12/31/25)
The Fund's Wealth Class shares total return from January 1, 2026 to March 31, 2026 was 0.82%.
Wealth Class Shares of the Fund commenced operations on January 17, 2023. For full calendar years through December 31, 2023, the performance of the Fund's Institutional shares is shown. The Fund's Institutional shares are offered in a separate prospectus. Because Wealth Class shares would have been invested in the same portfolio of securities, returns for Wealth Class shares would have been substantially similar to those of Institutional shares, shown here, and would have differed only to the extent that the classes do not have the same total annual fund operating expenses. Because Wealth Class shares have higher expenses than Institutional shares, performance for Wealth Class shares would have been lower than that of Institutional shares.

Bar Chart, Year to Date Return

0.82%

Highest Quarterly Return, Label [Optional Text]

Best Quarter:

Highest Quarterly Return, Date

Sep. 30, 2024

Lowest Quarterly Return

0.94%

Performance Table Heading

Average Annual Total Returns (for the periods ended December 31, 2025)

Performance Table Footnotes, Reason Performance Information for Class Different from Immediately Preceding Period [Text]

The Fund's Wealth Class shares commenced operations on January 17, 2023. For periods prior to January 17, 2023, the performance of the Fund's Institutional shares has been used. Returns for Wealth Class shares would have been substantially similar to those of Institutional shares and would have differed only to the extent that Wealth Class shares have higher total annual fund operating expenses than Institutional shares.

Performance Availability Website Address [Text]

http://www.seic.com/holdings

Bar Chart and Performance Table [Heading]

Performance Information

Performance Past Does Not Indicate Future [Text]

The Fund's past performance is not necessarily an indication of how the Fund will perform in the future.

Bar Chart [Table]

Best Quarter: 1.29% (12/31/23)
Worst Quarter: 0.00% (03/31/21)
The Fund's Institutional shares total return from January 1, 2026 to March 31, 2026 was 0.86%.

Year to Date Return, Label [Optional Text]

The Fund's Institutional shares total return from January 1, 2026 to March 31, 2026 was

Bar Chart, Year to Date Return, Date

Mar. 31, 2026

Highest Quarterly Return

1.29%

Lowest Quarterly Return, Label [Optional Text]

Worst Quarter:

Lowest Quarterly Return, Date

Mar. 31, 2021

Performance [Table]

Institutional Shares				1 Year				5 Years				10 Years				Since Inception (10/27/1995)
Government Fund					4.14	%			3.05	%			2.00	%			2.38	%

Performance Availability Website Address [Text]

http://www.seic.com/holdings