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Performance Management
Jan. 31, 2024
Administrative Shares Prospectus | DREYFUS CASH MANAGEMENT  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Administrative shares from year to year. The table shows the average annual total returns of the fund's Administrative shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) Administrative Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Administrative Shares

 

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.31%

Worst Quarter
Q1, 2022: -0.03%

The year-to-date total return of the fund's Administrative shares as of March 31, 2024 was 1.29%.
Bar Chart Closing [Text Block]

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.31%

Worst Quarter
Q1, 2022: -0.03%

The year-to-date total return of the fund's Administrative shares as of March 31, 2024 was 1.29%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.29%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.31%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return (0.03%)
Lowest Quarterly Return, Date Mar. 31, 2022
Performance [Table]
    

Average Annual Total Returns as of 12/31/23

 

1 Year

5 Years

10 Years

Administrative Shares

4.94%

1.84%

1.23%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Administrative shares, call toll-free 1-800-373-9387 (inside the U.S. only). Individuals or entities for whom institutions may purchase or redeem shares should call the institution directly.
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
Administrative Shares Prospectus | Dreyfus Government Cash Management  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Administrative shares from year to year. The table shows the average annual total returns of the fund's Administrative shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) Administrative Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Administrative Shares

 

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.30%

Worst Quarter
Q4, 2020: 0.00%

The year-to-date total return of the fund's Administrative shares as of March 31, 2024 was 1.28%.
Bar Chart Closing [Text Block]

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.30%

Worst Quarter
Q4, 2020: 0.00%

The year-to-date total return of the fund's Administrative shares as of March 31, 2024 was 1.28%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.28%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.30%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return none
Lowest Quarterly Return, Date Dec. 31, 2020
Performance [Table]
    

Average Annual Total Returns as of 12/31/23

 

1 Year

5 Years

10 Years

Administrative Shares

4.93%

1.73%

1.11%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Administrative shares, call toll-free 1-800-373-9387 (inside the U.S. only). Individuals or entities for whom institutions may purchase or redeem shares should call the institution directly.
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
Administrative Shares Prospectus | Dreyfus Government Securities Cash Management  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Administrative shares from year to year. The table shows the average annual total returns of the fund's Administrative shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) Administrative Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Administrative Shares

 

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.29%

Worst Quarter
Q1, 2022: 0.00%

The year-to-date total return of the fund's Administrative shares as of March 31, 2024 was 1.27%.
Bar Chart Closing [Text Block]

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.29%

Worst Quarter
Q1, 2022: 0.00%

The year-to-date total return of the fund's Administrative shares as of March 31, 2024 was 1.27%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.27%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.29%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return none
Lowest Quarterly Return, Date Mar. 31, 2022
Performance [Table]
    

Average Annual Total Returns as of 12/31/23

 

1 Year

5 Years

10 Years

Administrative Shares

4.86%

1.68%

1.07%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Administrative shares, call toll-free 1-800-373-9387 (inside the U.S. only). Individuals or entities for whom institutions may purchase or redeem shares should call the institution directly.
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
Administrative Shares Prospectus | Dreyfus Treasury Obligations Cash Management  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Administrative shares from year to year. The table shows the average annual total returns of the fund's Administrative shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) Administrative Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Administrative Shares

 

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.30%

Worst Quarter
Q1, 2022: 0.00%

The year-to-date total return of the fund's Administrative shares as of March 31, 2024 was 1.28%
Bar Chart Closing [Text Block]

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.30%

Worst Quarter
Q1, 2022: 0.00%

The year-to-date total return of the fund's Administrative shares as of March 31, 2024 was 1.28%
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.28%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.30%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return none
Lowest Quarterly Return, Date Mar. 31, 2022
Performance [Table]
    

Average Annual Total Returns as of 12/31/23

 

1 Year

5 Years

10 Years

Administrative Shares

4.92%

1.72%

1.09%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Administrative shares, call toll-free 1-800-373-9387 (inside the U.S. only). Individuals or entities for whom institutions may purchase or redeem shares should call the institution directly.
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
Administrative Shares Prospectus | DREYFUS TREASURY SECURITIES CASH MANAGEMENT  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Administrative shares from year to year. The table shows the average annual total returns of the fund's Administrative shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Return as of 12/31 each year (%) Administrative Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Administrative Shares

 

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.31%

Worst Quarter
Q1, 2022: 0.00%

The year-to-date total return of the fund's Administrative shares as of March 31, 2024 was 1.28%.
Bar Chart Closing [Text Block]

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.31%

Worst Quarter
Q1, 2022: 0.00%

The year-to-date total return of the fund's Administrative shares as of March 31, 2024 was 1.28%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.28%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.31%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return none
Lowest Quarterly Return, Date Mar. 31, 2022
Performance [Table]
    

Average Annual Total Returns as of 12/31/23

 

1 Year

5 Years

10 Years

Administrative Shares

4.84%

1.67%

1.06%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Administrative shares, call toll-free 1-800-373-9387 (inside the U.S. only). Individuals or entities for whom institutions may purchase or redeem shares should call the institution directly.
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
BOLD Shares Prospectus | Dreyfus Government Cash Management  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's BOLD® shares for the first complete calendar year since the fund commenced offering BOLD® shares. The table shows the average annual total returns of the fund's BOLD® shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) BOLD® Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
BOLD® Shares

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.32%

Worst Quarter
Q1, 2023: 1.09%
Bar Chart Closing [Text Block]

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.32%

Worst Quarter
Q1, 2023: 1.09%

The year-to-date total return of the fund's BOLD® shares as of March 31, 2024 was 1.30%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.30%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.32%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return 1.09%
Lowest Quarterly Return, Date Mar. 31, 2023
Performance [Table]
    

Average Annual Total Returns as of 12/31/23

 
 

1 Year

Since Inception
(02/23/2022)

BOLD® Shares

5.03%

3.54%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for BOLD® shares, call toll-free 1-800-373-9387 (inside the U.S. only). Clients of institutions should call the institution directly.
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
Institutional Shares Prospectus | DREYFUS CASH MANAGEMENT  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Institutional shares from year to year. The table shows the average annual total returns of the fund's Institutional shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) Institutional Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Institutional Shares

 

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.34%

Worst Quarter
Q1, 2022: -0.02%
Bar Chart Closing [Text Block]

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.34%

Worst Quarter
Q1, 2022: -0.02%

The year-to-date total return of the fund's Institutional shares as of March 31, 2024 was 1.32%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.32%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.34%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return (0.02%)
Lowest Quarterly Return, Date Mar. 31, 2022
Performance [Table]
    

Average Annual Total Returns as of 12/31/23

 

1 Year

5 Years

10 Years

Institutional Shares

5.07%

1.93%

1.31%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Institutional shares, call toll-free 1-800-373-9387 (inside the U.S. only). Individuals or entities for whom institutions may purchase or redeem shares should call the institution directly.
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
Institutional Shares Prospectus | Dreyfus Government Cash Management  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Institutional shares from year to year. The table shows the average annual total returns of the fund's Institutional shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) Institutional Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Institutional Shares

 

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.32%

Worst Quarter
Q4, 2020: 0.00%
Bar Chart Closing [Text Block]

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.32%

Worst Quarter
Q4, 2020: 0.00%

The year-to-date total return of the fund's Institutional shares as of March 31, 2024 was 1.30%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.30%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.32%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return none
Lowest Quarterly Return, Date Dec. 31, 2020
Performance [Table]
    

Average Annual Total Returns as of 12/31/23

 

1 Year

5 Years

10 Years

Institutional Shares

5.03%

1.80%

1.18%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Institutional shares, call toll-free 1-800-373-9387 (inside the U.S. only). Individuals or entities for whom institutions may purchase or redeem shares should call the institution directly.
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
Insitutional Shares Prospectus | Dreyfus Government Securities Cash Management  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Institutional shares from year to year. The table shows the average annual total returns of the fund's Institutional shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) Institutional Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Institutional Shares

 

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.32%

Worst Quarter
Q1, 2022: 0.00%
Bar Chart Closing [Text Block]

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.32%

Worst Quarter
Q1, 2022: 0.00%

 

The year-to-date total return of the fund's Institutional shares as of March 31, 2024 was 1.30%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.30%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.32%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return none
Lowest Quarterly Return, Date Mar. 31, 2020
Performance [Table]
    

Average Annual Total Returns as of 12/31/23

 

1 Year

5 Years

10 Years

Institutional Shares

4.97%

1.74%

1.13%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Institutional shares, call toll-free 1-800-373-9387 (inside the U.S. only). Individuals or entities for whom institutions may purchase or redeem shares should call the institution directly.
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
Insitutional Shares Prospectus | Dreyfus Treasury Obligations Cash Management  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Institutional shares from year to year. The table shows the average annual total returns of the fund's Institutional shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) Institutional Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Institutional Shares

 

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.32%

Worst Quarter
Q4, 2021: 0.00%
Bar Chart Closing [Text Block]

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.32%

Worst Quarter
Q4, 2021: 0.00%

The year-to-date total return of the fund's Institutional shares as of March 31, 2024 was 1.30%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.30%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.32%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return none
Lowest Quarterly Return, Date Dec. 31, 2021
Performance [Table]
    

Average Annual Total Returns as of 12/31/23

 

1 Year

5 Years

10 Years

Institutional Shares

5.03%

1.78%

1.16%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Institutional shares, call toll-free 1-800-373-9387 (inside the U.S. only). Individuals or entities for whom institutions may purchase or redeem shares should call the institution directly.
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
Insitutional Shares Prospectus | DREYFUS TREASURY SECURITIES CASH MANAGEMENT  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Institutional shares from year to year. The table shows the average annual total returns of the fund's Institutional shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) Institutional Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Institutional Shares

 

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.33%

Worst Quarter
Q4, 2021: 0.00%
Bar Chart Closing [Text Block]

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.33%

Worst Quarter
Q4, 2021: 0.00%

The year-to-date total return of the fund's Institutional shares as of March 31, 2024 was 1.30%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.30%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.33%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return none
Lowest Quarterly Return, Date Dec. 31, 2021
Performance [Table]
    

Average Annual Total Returns as of 12/31/23

 

1 Year

5 Years

10 Years

Institutional Shares

4.94%

1.74%

1.12%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Institutional shares, call toll-free 1-800-373-9387 (inside the U.S. only). Individuals or entities for whom institutions may purchase or redeem shares should call the institution directly.
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
Insitutional Shares Prospectus | DREYFUS TAX EXEMPT CASH MANAGEMENT FUND  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Institutional shares from year to year. The table shows the average annual total returns of the fund's Institutional shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) Institutional Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Institutional Shares

 

During the periods shown in the chart:

Best Quarter
Q4, 2023: 0.89%

Worst Quarter
Q4, 2021: 0.00%

The year-to-date total return of the fund's Institutional shares as of March 31, 2024 was 0.78%.
Bar Chart Closing [Text Block]

During the periods shown in the chart:

Best Quarter
Q4, 2023: 0.89%

Worst Quarter
Q4, 2021: 0.00%

The year-to-date total return of the fund's Institutional shares as of March 31, 2024 was 0.78%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 0.78%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 0.89%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return none
Lowest Quarterly Return, Date Dec. 31, 2021
Performance [Table]
    

Average Annual Total Returns as of 12/31/23

 

1 Year

5 Years

10 Years

Institutional Shares

3.19%

1.19%

0.80%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Institutional shares, call toll-free 1-800-373-9387 (inside the U.S. only). Individuals or entities for whom institutions may purchase or redeem shares should call the institution directly.
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
Investor Shares Prospectus | DREYFUS CASH MANAGEMENT  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Investor shares from year to year. The table shows the average annual total returns of the fund's Investor shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) Investor Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Investor Shares

 

During the periods shown in the chart:

Best Quarter
Q4 2023: 1.25%

Worst Quarter
Q1, 2022: -0.03%
Bar Chart Closing [Text Block]

During the periods shown in the chart:

Best Quarter
Q4 2023: 1.25%

Worst Quarter
Q1, 2022: -0.03%

The year-to-date total return of the fund's Investor shares as of March 31, 2024 was 1.24%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.24%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.25%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return (0.03%)
Lowest Quarterly Return, Date Mar. 31, 2022
Performance [Table]
    

Average Annual Total Returns as of 12/31/23

 

1 Year

5 Years

10 Years

Investor Shares

4.74%

1.72%

1.13%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Investor shares, call toll-free 1-800-373-9387 (inside the U.S. only). Individuals or entities for whom institutions may purchase or redeem shares should call the institution directly.
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
Investor Shares Prospectus | Dreyfus Government Cash Management  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Investor shares from year to year. The table shows the average annual total returns of the fund's Investor shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) Investor Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Investor Shares

 

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.26%

Worst Quarter
Q4, 2020: 0.00%
Bar Chart Closing [Text Block]

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.26%

Worst Quarter
Q4, 2020: 0.00%

The year-to-date total return of the fund's Investor shares as of March 31, 2024 was 1.24%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.24%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.26%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return none
Lowest Quarterly Return, Date Dec. 31, 2020
Performance [Table]
    

Average Annual Total Returns as of 12/31/23

 

1 Year

5 Years

10 Years

Investor Shares

4.77%

1.64%

1.02%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Investor shares call toll-free 1-800-373-9387 (inside the U.S. only). Individuals or entities for whom institutions may purchase or redeem shares should call the institution directly.
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
Investor Shares Prospectus | Dreyfus Government Securities Cash Management  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Investor shares from year to year. The table shows the average annual total returns of the fund's Investor shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) Investor Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Investor Shares

 

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.26%

Worst Quarter
Q1, 2022: 0.00%
Bar Chart Closing [Text Block]

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.26%

Worst Quarter
Q1, 2022: 0.00%

The year-to-date total return of the fund's Investor shares as of March 31, 2024 was 1.23%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.23%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.26%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return none
Lowest Quarterly Return, Date Mar. 31, 2022
Performance [Table]
    

Average Annual Total Returns as of 12/31/23

 

1 Year

5 Years

10 Years

Investor Shares

4.71%

1.59%

0.98%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Investor shares, call toll-free 1-800-373-9387 (inside the U.S. only). Individuals or entities for whom institutions may purchase or redeem shares should call the institution directly.
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
Investor Shares Prospectus | Dreyfus Treasury Obligations Cash Management  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Investor shares from year to year. The table shows the average annual total returns of the fund's Investor shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) Investor Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Investor Shares

 

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.26%

Worst Quarter
Q1, 2022: 0.00%
Bar Chart Closing [Text Block]

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.26%

Worst Quarter
Q1, 2022: 0.00%

The year-to-date total return of the fund's Investor shares as of March 31, 2024 was 1.24%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.24%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.26%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return none
Lowest Quarterly Return, Date Mar. 31, 2022
Performance [Table]
    

Average Annual Total Returns as of 12/31/23

 

1 Year

5 Years

10 Years

Investor Shares

4.77%

1.63%

1.01%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Investor shares, call toll-free 1-800-373-9387 (inside the U.S. only). Individuals or entities for whom institutions may purchase or redeem shares should call the institution directly.
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
Investor Shares Prospectus | DREYFUS TREASURY SECURITIES CASH MANAGEMENT  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Investor shares from year to year. The table shows the average annual total returns of the fund's Investor shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) Investor Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Investor Shares

 

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.27%

Worst Quarter
Q1, 2022: 0.00%
Bar Chart Closing [Text Block]

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.27%

Worst Quarter
Q1, 2022: 0.00%

The year-to-date total return of the fund's Investor shares as of March 31, 2024 was 1.24%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.24%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.27%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return none
Lowest Quarterly Return, Date Mar. 31, 2022
Performance [Table]
    

Average Annual Total Returns as of 12/31/23

 

1 Year

5 Years

10 Years

Investor Shares

4.68%

1.58%

0.98%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Investor shares, call toll-free 1-800-373-9387 (inside the U.S. only). Individuals or entities for whom institutions may purchase or redeem shares should call the institution directly.
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
Participant Shares Prospectus | Dreyfus Government Cash Management  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Participant shares from year to year. The table shows the average annual total returns of the fund's Participant shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) Participant Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Participant Shares

 

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.22%

Worst Quarter
Q4, 2020: 0.00%
Bar Chart Closing [Text Block]

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.22%

Worst Quarter
Q4, 2020: 0.00%

The year-to-date total return of the fund's Participant shares as of March 31, 2024 was 1.20%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.20%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.22%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return none
Lowest Quarterly Return, Date Dec. 31, 2020
Performance [Table]
    

Average Annual Total Returns as of 12/31/23

 

1 Year

5 Years

10 Years

Participant Shares

4.62%

1.55%

0.95%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Participant shares, call toll-free 1-800-373-9387 (inside the U.S. only). Individuals or entities for whom institutions may purchase or redeem shares should call the institution directly.
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
Participant Shares Prospectus | Dreyfus Government Securities Cash Management  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Participant shares from year to year. The table shows the average annual total returns of the fund's Participant shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) Participant Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Participant Shares

 

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.22%

Worst Quarter
Q1, 2022: 0.00%
Bar Chart Closing [Text Block]

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.22%

Worst Quarter
Q1, 2022: 0.00%

The year-to-date total return of the fund's Participant shares as of March 31, 2024 was 1.20%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.20%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.22%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return none
Lowest Quarterly Return, Date Mar. 31, 2022
Performance [Table]
    

Average Annual Total Returns as of 12/31/23

 

1 Year

5 Years

10 Years

Participant Shares

4.55%

1.50%

0.91%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Participant shares, call toll-free 1-800-373-9387 (inside the U.S. only). Individuals or entities for whom institutions may purchase or redeem shares should call the institution directly.
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
Participant Shares Prospectus | Dreyfus Treasury Obligations Cash Management  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Participant shares from year to year. The table shows the average annual total returns of the fund's Participant shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) Participant Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Participant Shares

 

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.22%

Worst Quarter
Q1, 2022: 0.00%
Bar Chart Closing [Text Block]

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.22%

Worst Quarter
Q1, 2022: 0.00%

The year-to-date total return of the fund's Participant shares as of March 31, 2024 was 1.20%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.20%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.22%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return none
Lowest Quarterly Return, Date Mar. 31, 2022
Performance [Table]
    

Average Annual Total Returns as of 12/31/23

 

1 Year

5 Years

10 Years

Participant Shares

4.61%

1.54%

0.94%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Participant shares, call toll-free 1-800-373-9387 (inside the U.S. only). Individuals or entities for whom institutions may purchase or redeem shares should call the institution directly.
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
Participant Shares Prospectus | DREYFUS TREASURY SECURITIES CASH MANAGEMENT  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Participant shares from year to year. The table shows the average annual total returns of the fund's Participant shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) Participant Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Participant Shares

 

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.23%

Worst Quarter
Q1, 2022: 0.00%
Bar Chart Closing [Text Block]

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.23%

Worst Quarter
Q1, 2022: 0.00%

The year-to-date total return of the fund's Participant shares as of March 31, 2024 was 1.20%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.20%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.23%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return none
Lowest Quarterly Return, Date Mar. 31, 2022
Performance [Table]
    

Average Annual Total Returns as of 12/31/23

 

1 Year

5 Years

10 Years

Participant Shares

4.53%

1.49%

0.90%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Participant shares, call toll-free 1-800-373-9387 (inside the U.S. only). Individuals or entities for whom institutions may purchase or redeem shares should call the institution directly.
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
Service Shares Prospectus | Dreyfus Government Cash Management  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Service shares from year to year. The table shows the average annual total returns of the fund's Service shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.

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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) Service Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Service Shares

 

During the periods shown in the chart:
Best Quarter
Q4, 2023: 1.12%

Worst Quarter
Q1, 2022: 0.01%
Bar Chart Closing [Text Block]

During the periods shown in the chart:
Best Quarter
Q4, 2023: 1.12%

Worst Quarter
Q1, 2022: 0.01%

The year-to-date total return of the fund's Service shares as of March 31, 2024 was 1.10%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.10%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.12%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return 0.01%
Lowest Quarterly Return, Date Mar. 31, 2022
Performance [Table]
   

Average Annual Total Returns as of 12/31/23

 

1 Year

Since Inception

(11/16/2020)

Service Shares

4.20%

1.66%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Service shares, call toll-free 1-800-373-9387 (inside the U.S. only).
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
Service Shares Prospectus | Dreyfus Treasury Obligations Cash Management  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Service shares from year to year. The table shows the average annual total returns of the fund's Service shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) Service Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Service Shares

 

During the periods shown in the chart:
Best Quarter
Q4, 2023: 1.12%

Worst Quarter
Q1, 2022: 0.00%
Bar Chart Closing [Text Block]

During the periods shown in the chart:
Best Quarter
Q4, 2023: 1.12%

Worst Quarter
Q1, 2022: 0.00%

The year-to-date total return of the fund's Service shares as of March 31, 2024 was 1.10%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.10%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.12%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return none
Lowest Quarterly Return, Date Mar. 31, 2022
Performance [Table]
   

Average Annual Total Returns as of 12/31/23

 

1 Year

Since Inception

(11/16/2020)

Service Shares

4.20%

1.66%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Service shares, call toll-free 1-800-373-9387 (inside the U.S. only).
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
Service Shares Prospectus | DREYFUS TREASURY SECURITIES CASH MANAGEMENT  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Service shares from year to year. The table shows the average annual total returns of the fund's Service shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) Service Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Service Shares

 

During the periods shown in the chart:
Best Quarter
Q4, 2023: 1.13%

Worst Quarter
Q1, 2022: 0.00%
Bar Chart Closing [Text Block]

During the periods shown in the chart:
Best Quarter
Q4, 2023: 1.13%

Worst Quarter
Q1, 2022: 0.00%

The year-to-date total return of the fund's Service shares as of March 31, 2024 was 1.10%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.10%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.13%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return none
Lowest Quarterly Return, Date Mar. 31, 2022
Performance [Table]
   

Average Annual Total Returns as of 12/31/23

 

1 Year

Since Inception

(11/16/2020)

Service Shares

4.11%

1.59%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Service shares, call toll-free 1-800-373-9387 (inside the U.S. only).
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
Spark Shares Prospectus | Dreyfus Government Cash Management  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Institutional shares from year to year. The table shows the average annual total returns of the fund's Institutional shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.

The historical performance of the fund's Institutional shares, which are not offered in this prospectus, is shown in the bar chart and table since past performance information for a full calendar year is not available for SPARKSM shares as of the date of this prospectus. Each share class is invested in the same portfolio of securities, and the annual returns would have differed only to the extent that the classes have different expenses.

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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%)
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)*

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.32%

Worst Quarter
Q4, 2020: 0.00%
Bar Chart Footnotes [Text Block]

* Reflects the performance of the fund's Institutional shares, which are offered in a separate prospectus.

Bar Chart Closing [Text Block]

 

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.32%

Worst Quarter
Q4, 2020: 0.00%

The year-to-date total return of the fund's SparkSM shares as of March 31, 2024 was 1.30%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.30%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.32%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return none
Lowest Quarterly Return, Date Dec. 31, 2020
Performance [Table]
    

Average Annual Total Returns as of 12/31/23*

 

1 Year

5 Years

10 Years

Institutional Shares

5.03%

1.80%

1.18%

* Reflects the performance of the fund's Institutional shares, which are offered in a separate prospectus.

Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for SPARKSM shares call toll-free 1-800-346-3621. Individuals or entities for whom institutions may purchase or redeem shares should call the institution directly.
Money Market Seven Day Yield Phone 1-800-346-3621
Performance Availability Website Address [Text] www.dreyfus.com
Wealth Shares Prospectus | Dreyfus Government Cash Management  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Wealth shares from year to year. The table shows the average annual total returns of the fund's Wealth shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) Wealth Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Wealth Shares

 

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.26%

Worst Quarter
Q1, 2022: 0.01%
Bar Chart Closing [Text Block]

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.26%

Worst Quarter
Q1, 2022: 0.01%

The year-to-date total return of the fund's Wealth shares as of March 31, 2024 was 1.24%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.24%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.26%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return 0.01%
Lowest Quarterly Return, Date Mar. 31, 2022
Performance [Table]
   

Average Annual Total Returns as of 12/31/23

 

1 Year

Since Inception

(11/16/2020)

Wealth Shares

4.77%

1.95%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Wealth shares, call toll-free 1-800-373-9387 (inside the U.S. only).
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
Wealth Shares Prospectus | Dreyfus Treasury Obligations Cash Management  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Wealth shares from year to year. The table shows the average annual total returns of the fund's Wealth shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) Wealth Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Wealth Shares

 

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.26%
Worst Quarter
Q1, 2022: 0.00%
Bar Chart Closing [Text Block]

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.26%
Worst Quarter
Q1, 2022: 0.00%

The year-to-date total return of the fund's Wealth shares as of March 31, 2024 was 1.24%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.24%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.26%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return none
Lowest Quarterly Return, Date Mar. 31, 2022
Performance [Table]
   

Average Annual Total Returns as of 12/31/23

 

1 Year

Since Inception

(11/16/2020)

Wealth Shares

4.77%

1.95%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Wealth shares, call toll-free 1-800-373-9387 (inside the U.S. only).
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com
Wealth Shares Prospectus | DREYFUS TREASURY SECURITIES CASH MANAGEMENT  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Wealth shares from year to year. The table shows the average annual total returns of the fund's Wealth shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.
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.
Performance Information Illustrates Variability of Returns [Text] The following bar chart and table provide some indication of the risks of investing in the fund.
Bar Chart [Heading] Year-by-Year Total Returns as of 12/31 each year (%) Wealth Shares
Bar Chart [Table]
  

Year-by-Year Total Returns as of 12/31 each year (%)
Wealth Shares

 

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.26%
Worst Quarter
Q1, 2022: 0.00%
Bar Chart Closing [Text Block]

During the periods shown in the chart:

Best Quarter
Q4, 2023: 1.26%
Worst Quarter
Q1, 2022: 0.00%

The year-to-date total return of the fund's Wealth shares as of March 31, 2024 was 1.24%.
Year to Date Return, Label [Optional Text] year-to-date total return
Bar Chart, Year to Date Return 1.24%
Bar Chart, Year to Date Return, Date Mar. 31, 2024
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 1.26%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return none
Lowest Quarterly Return, Date Mar. 31, 2022
Performance [Table]
   

Average Annual Total Returns as of 12/31/23

 

1 Year

Since Inception

(11/16/2020)

Wealth Shares

4.67%

1.87%
Average Annual Return, Caption [Optional Text] Average Annual Total Returns as of 12/31/23
Performance Table Closing [Text Block]

For the current yield for Wealth shares, call toll-free 1-800-373-9387 (inside the U.S. only).
Money Market Seven Day Yield Phone 1-800-373-9387
Performance Availability Website Address [Text] www.dreyfus.com