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Fees and Expenses
Jan. 31, 2024
Administrative Shares Prospectus | DREYFUS CASH MANAGEMENT  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
  

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 

Administrative Shares

Management fees

.10

Other expenses:

 

Shareholder services fees

.20

Miscellaneous other expenses

.04

Total other expenses

.24

Total annual fund operating expenses

.34

Fee waiver and/or expense reimbursement*

(.01)

Total annual fund operating expenses
(after fee waiver and/or expense reimbursement)

.33

* The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed to waive receipt of its fees and/or assume the direct expenses of the fund's Preferred shares until May 31, 2025, so that the direct expenses of Preferred shares (excluding taxes, brokerage commissions and extraordinary expenses) do not exceed .10%. To the extent that it is necessary for BNY Mellon Investment Adviser, Inc. to waive receipt of its management fee or reimburse the fund's common expenses, the amount of the waiver or reimbursement will be applied equally to each share class of the fund. The fund's Preferred shares are offered in a different prospectus, but, to the extent that it is necessary for BNY Mellon Investment Adviser, Inc. to reimburse the fund's management fee or common expenses as a result of such expense limitation agreement, the amount of the waiver or reimbursement will be applied equally to each share class of the fund, including Administrative shares (which amounted to .01% for the past fiscal year). On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate this expense limitation agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the expense limitation agreement by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Administrative Shares

$34

$108

$190

$430

Administrative Shares Prospectus | Dreyfus Government Cash Management  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
  

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 

Administrative Shares

Management fees

.20

Other expenses:

 

Shareholder services fees

.10

Miscellaneous other expenses

.01

Total other expenses

.11

Total annual fund operating expenses

.31

Fee waiver*

(.03)

Total annual fund operating expenses
(after fee waiver)

.28

* The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, until May 31, 2025, to waive receipt of a portion of its management fee in the amount of .03% of the value of the fund's average daily net assets. On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate this waiver agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the contractual undertaking by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Administrative Shares

$29

$97

$171

$390

Administrative Shares Prospectus | Dreyfus Government Securities Cash Management  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
  

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 

Administrative Shares

Management fees

.20

Other expenses:

 

Shareholder services fees

.10

Miscellaneous other expenses

.01

Total other expenses

.11

Total annual fund operating expenses

.31

Fee waiver*

(.01)

Total annual fund operating expenses
(after fee waiver)

.30

* The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, until May 31, 2025, to waive receipt of a portion of its management fee in the amount of .01% of the value of the fund's average daily net assets. On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate this waiver agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the contractual undertaking by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Administrative Shares

$31

$99

$173

$392

Administrative Shares Prospectus | Dreyfus Treasury Obligations Cash Management  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
  

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 

Administrative Shares

Management fees

.20

Other expenses:

 

Shareholder services fees

.10

Miscellaneous other expenses

.02

Total other expenses

.12

Total annual fund operating expenses

.32

Fee waiver*

(.03)

Total annual fund operating expenses
(after fee waiver)

.29

* The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, until May 31, 2025, to waive receipt of a portion of its management fee in the amount of .03% of the value of the fund's average daily net assets. On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate this waiver agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the contractual undertaking by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Administrative Shares

$30

$100

$177

$403

Administrative Shares Prospectus | DREYFUS TREASURY SECURITIES CASH MANAGEMENT  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
  

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 

Administrative Shares

Management fees

.20

Other expenses:

 

Shareholder services fees

.10

Miscellaneous other expenses

.00*

Total other expenses

.10

Total annual fund operating expenses

.30

Fee waiver**

(.03)

Total annual fund operating expenses
(after fee waiver)

.27

* Amount represents less than .01%.

** The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, until May 31, 2025, to waive receipt of a portion of its management fee in the amount of .03% of the value of the fund's average daily net assets. On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate this waiver agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the contractual undertaking by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Administrative Shares

$28

$93

$166

$378

BOLD Shares Prospectus | Dreyfus Government Cash Management  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
  

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 

BOLD® Shares

Management fees

.20

Other expenses

.01

Total annual fund operating expenses

.21

Fee waiver and/or expense reimbursement* 

(.03)

Total annual fund operating expenses (after fee waiver and/or expense reimbursement)

.18

* The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, until May 31, 2025, to waive receipt of a portion of its management fee in the amount of .03% of the value of the fund's average daily net assets. In addition, BNY Mellon Investment Adviser, Inc. has contractually agreed, until May 31, 2025, to waive receipt of its fees and/or assume the direct expenses of the fund's BOLD® shares so that the direct expenses of BOLD® shares (excluding taxes, brokerage commissions and extraordinary expenses) do not exceed .18%. To the extent that it is necessary for BNY Mellon Investment Adviser, Inc. to waive receipt of its management fee or reimburse the fund's common expenses, the amount of the waiver or reimbursement will be applied equally to each share class of the fund. On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate the fee waiver agreement and/or expense limitation agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the fee waiver and expense limitation agreements by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

BOLD® Shares

$18

$65

$115

$265

Institutional Shares Prospectus | DREYFUS CASH MANAGEMENT  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
  

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 

Institutional Shares

Management fees

.10

Other expenses:

 

Shareholder services fees

.10

Miscellaneous other expenses

.01

Total other expenses

.11

Total annual fund operating expenses

.21

Fee waiver and/or expense reimbursement*

(.01)

Total annual fund operating expenses
(after fee waiver and/or expense reimbursement)


.20

* The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed to waive receipt of its fees and/or assume the direct expenses of the fund's Preferred shares until May 31, 2025, so that the direct expenses of Preferred shares (excluding taxes, brokerage commissions and extraordinary expenses) do not exceed .10%. The fund's Preferred shares are offered in a different prospectus, but, to the extent that it is necessary for BNY Mellon Investment Adviser, Inc. to reimburse the fund's management fee or common expenses as a result of such expense limitation agreement, the amount of the waiver or reimbursement will be applied equally to each share class of the fund, including Institutional shares (which amounted to .01% for the past fiscal year). On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate this expense limitation agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the expense limitation agreement by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Institutional Shares

$20

$67

$117

$267

Institutional Shares Prospectus | Dreyfus Government Cash Management  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
   

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 
 

Institutional Shares

Management fees

.20

Other expenses:

 

Shareholder services fees

.00*

Miscellaneous other expenses

.01

Total other expenses

.01

Total annual fund operating expenses

.21

Fee waiver**

(.03)

Total annual fund operating expenses
(after fee waiver)


.18

* Amount represents less than .01%.

** The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, until May 31, 2025, to waive receipt of a portion of its management fee in the amount of .03% of the value of the fund's average daily net assets. On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate this waiver agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the contractual undertaking by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Institutional Shares

$18

$65

$115

$265

Insitutional Shares Prospectus | Dreyfus Government Securities Cash Management  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
   

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 
 

Institutional Shares

Management fees

.20

Other expenses:

 

Shareholder services fees

.00*

Miscellaneous other expenses

.01

Total other expenses

.01

Total annual fund operating expenses

.21

Fee waiver*

(.01)

Total annual fund operating expenses
(after fee waiver)**


.20

* Amount represents less than .01%.

** The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, until May 31, 2025, to waive receipt of a portion of its management fee in the amount of .01% of the value of the fund's average daily net assets. On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate this waiver agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the contractual undertaking by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Institutional Shares

$20

$67

$117

$267

Insitutional Shares Prospectus | Dreyfus Treasury Obligations Cash Management  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
  

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 

Institutional Shares

Management fees

.20

Other expenses:

 

Shareholder services fees

.00*

Miscellaneous other expenses

.01

Total other expenses

.01

Total annual fund operating expenses

.21

Fee waiver**

(.03)

Total annual fund operating expenses
(after fee waiver)


.18

* Amount represents less than .01%.

** The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, until May 31, 2025, to waive receipt of a portion of its management fee in the amount of .03% of the value of the fund's average daily net assets. On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate this waiver agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the contractual undertaking by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Institutional Shares

$18

$65

$115

$265

Insitutional Shares Prospectus | DREYFUS TREASURY SECURITIES CASH MANAGEMENT  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
   

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 
 

Institutional Shares

Management fees

.20

Other expenses:

 

Shareholder services fees

.00*

Miscellaneous other expenses

.01

Total other expenses

.01

Total annual fund operating expenses

.21

Fee waiver**

(.03)

Total annual fund operating expenses
(after fee waiver)


.18

* Amount represents less than .01%.

** The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, until May 31, 2025, to waive receipt of a portion of its management fee in the amount of .03% of the value of the fund's average daily net assets. On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate this waiver agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the contractual undertaking by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Institutional Shares

$18

$65

$115

$265

Insitutional Shares Prospectus | DREYFUS TAX EXEMPT CASH MANAGEMENT FUND  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
   

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 
 

Institutional Shares

Management fees

.20

Other expenses:

 

Shareholder services fees

.01

Miscellaneous other expenses

.05

Total other expenses

.06

Total annual fund operating expenses

.26

Fee waiver and/or expense reimbursement*

(.06)

Total annual fund operating expenses
(after fee waiver and/or expense reimbursement)


.20

* The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, until May 31, 2025, to waive receipt of its fees and/or assume the direct expenses of the fund's Institutional shares so that the direct expenses of the fund's Institutional shares (excluding taxes, brokerage commissions and extraordinary expenses) do not exceed .20%. On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate the expense limitation agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the expense limitation agreement by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Institutional Shares

$20

$78

$140

$325

Investor Shares Prospectus | DREYFUS CASH MANAGEMENT  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
   

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 
 

Investor Shares

Management fees

.10

Other expenses:

 

Administration fees

.10

Shareholder services fees

.25

Miscellaneous other expenses

.08

Total other expenses

.43

Total annual fund operating expenses

.53

Fee waiver and/or expense reimbursement*

(.01)

Total annual fund operating expenses
(after fee waiver and/or expense reimbursement)


.52

* The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed to waive receipt of its fees and/or assume the direct expenses of the fund's Preferred shares until May 31, 2025, so that the direct expenses of Preferred shares (excluding taxes, brokerage commissions and extraordinary expenses) do not exceed .10%. The fund's Preferred shares are offered in a different prospectus, but, to the extent that it is necessary for BNY Mellon Investment Adviser, Inc. to reimburse the fund's management fee or common expenses as a result of such expense limitation agreement, the amount of the waiver or reimbursement will be applied equally to each share class of the fund, including Investor shares (which amounted to .01% for the past fiscal year). On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate this expense limitation agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the expense limitation agreement by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Investor Shares

$53

$169

$295

$664

Investor Shares Prospectus | Dreyfus Government Cash Management  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
  

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 

Investor Shares

Management fees

.20

Other expenses:

 

Shareholder services fees

.25

Miscellaneous other expenses

.01

Total other expenses

.26

Total annual fund operating expenses

.46

Fee waiver*

(.03)

Total annual fund operating expenses
(after fee waiver)


.43

* The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, until May 31, 2025, to waive receipt of a portion of its management fee in the amount of .03% of the value of the fund's average daily net assets. On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate this waiver agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the contractual undertaking by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Investor Shares

$44

$145

$255

$576

Investor Shares Prospectus | Dreyfus Government Securities Cash Management  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
  

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 

Investor Shares

Management fees

.20

Other expenses:

 

Shareholder services fees

.25

Miscellaneous other expenses

.01

Total other expenses

.26

Total annual fund operating expenses

.46

Fee waiver*

(.01)

Total annual fund operating expenses
(after fee waiver)


.45

* The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, until May 31, 2025, to waive receipt of a portion of its management fee in the amount of .01% of the value of the fund's average daily net assets. On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate this waiver agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the contractual undertaking by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Investor Shares

$46

$147

$257

$578

Investor Shares Prospectus | Dreyfus Treasury Obligations Cash Management  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
  

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 

Investor Shares

Management fees

.20

Other expenses:

 

Shareholder services fees

.25

Miscellaneous other expenses

.00*

Total other expenses

.25

Total annual fund operating expenses

.45

Fee waiver**

(.03)

Total annual fund operating expenses
(after fee waiver)


.42

* Amount represents less than .01%.

** The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, until May 31, 2025, to waive receipt of a portion of its management fee in the amount of .03% of the value of the fund's average daily net assets. On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate this waiver agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the contractual undertaking by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Investor Shares

$43

$141

$249

$564

Investor Shares Prospectus | DREYFUS TREASURY SECURITIES CASH MANAGEMENT  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
  

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 

Investor Shares

Management fees

.20

Other expenses:

 

Shareholder services fees

.25

Miscellaneous other expenses

.00*

Total other expenses

.25

Total annual fund operating expenses

.45

Fee waiver**

(.03)

Total annual fund operating expenses
(after fee waiver)


.42

* Amount represents less than .01%.

** The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, until May 31, 2025, to waive receipt of a portion of its management fee in the amount of .03% of the value of the fund's average daily net assets. On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate this waiver agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the contractual undertaking by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Investor Shares

$43

$141

$249

$564

Participant Shares Prospectus | Dreyfus Government Cash Management  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
  

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 

Participant Shares

Management fees

.20

Other expenses:

 

Administration fees

.15

Shareholder services fees

.25

Miscellaneous other expenses

.01

Total other expenses

.41

Total annual fund operating expenses

.61

Fee waiver*

(.03)

Total annual fund operating expenses
(after fee waiver)


.58

* The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, until May 31, 2025, to waive receipt of a portion of its management fee in the amount of .03% of the value of the fund's average daily net assets. On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate this waiver agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the contractual undertaking by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Participant Shares

$59

$192

$337

$759

Participant Shares Prospectus | Dreyfus Government Securities Cash Management  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
  

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 

Participant Shares

Management fees

.20

Other expenses:

 

Administration fees

.15

Shareholder services fees

.25

Miscellaneous other expenses

.01

Total other expenses

.41

Total annual fund operating expenses

.61

Fee waiver*

(.01)

Total annual fund operating expenses
(after fee waiver)


.60

* The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, until May 31, 2025, to waive receipt of a portion of its management fee in the amount of .01% of the value of the fund's average daily net assets. On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate this waiver agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the contractual undertaking by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Participant Shares

$61

$194

$339

$761

Participant Shares Prospectus | Dreyfus Treasury Obligations Cash Management  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
  

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 

Participant Shares

Management fees

.20

Other expenses:

 

Administration fees

.15

Shareholder services fees

.25

Miscellaneous other expenses

.00*

Total other expenses

.40

Total annual fund operating expenses

.60

Fee waiver**

(.03)

Total annual fund operating expenses
(after fee waiver)


.57

* Amount represents less than .01%.

** The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, until May 31, 2025, to waive receipt of a portion of its management fee in the amount of .03% of the value of the fund's average daily net assets. On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate this waiver agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the contractual undertaking by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Participant Shares

$58

$189

$332

$747

Participant Shares Prospectus | DREYFUS TREASURY SECURITIES CASH MANAGEMENT  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
  

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 

Participant Shares

Management fees

.20

Other expenses:

 

Administration fees

.15

Shareholder services fees

.25

Miscellaneous other expenses

.00*

Total other expenses

.40

Total annual fund operating expenses

.60

Fee waiver**

(.03)

Total annual fund operating expenses
(after fee waiver)


.57

* Amount represents less than .01%.

** The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, until May 31, 2025, to waive receipt of a portion of its management fee in the amount of .03% of the value of the fund's average daily net assets. On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate this waiver agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the contractual undertaking by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Participant Shares

$58

$189

$332

$747

Service Shares Prospectus | Dreyfus Government Cash Management  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
  

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 

Service Shares

Management fees

.20

Other expenses:

 

Administrative services fees

.55

Shareholder services fees

.25

Miscellaneous other expenses

.01

Total other expenses

.81

Total annual fund operating expenses

1.01

Fee waiver*

(.03)

Total annual fund operating expenses
(after fee waiver)


.98

* The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, until May 31, 2025, to waive receipt of a portion of its management fee in the amount of .03% of the value of the fund's average daily net assets. On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate this waiver agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the contractual undertaking by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Service Shares

$100

$319

$555

$1,234

Service Shares Prospectus | Dreyfus Treasury Obligations Cash Management  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
  

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 

Service Shares

Management fees

.20

Other expenses:

 

Administrative services fees

.55

Shareholder services fees

.25

Miscellaneous other expenses

.00*

Total other expenses

.80

Total annual fund operating expenses

1.00

Fee waiver**

(.03)

Total annual fund operating expenses
(after fee waiver)


.97

* Amount represents less than .01%.

** The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, until May 31, 2025, to waive receipt of a portion of its management fee in the amount of .03% of the value of the fund's average daily net assets. On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate this waiver agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the contractual undertaking by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Service Shares

$99

$315

$550

$1,222

Service Shares Prospectus | DREYFUS TREASURY SECURITIES CASH MANAGEMENT  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
  

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 

Service Shares

Management fees

.20

Other expenses:

 

Administrative services fees

.55

Shareholder services fees

.25

Miscellaneous other expenses

.01

Total other expenses

.81

Total annual fund operating expenses

1.01

Fee waiver*

(.03)

Total annual fund operating expenses
(after fee waiver)


.98

* The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, until May 31, 2025, to waive receipt of a portion of its management fee in the amount of .03% of the value of the fund's average daily net assets. On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate this waiver agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the contractual undertaking by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Service Shares

$100

$319

$555

$1,234

Spark Shares Prospectus | Dreyfus Government Cash Management  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
  

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 

SPARKSM Shares

Management fees

.20

Other expenses

.04

Total annual fund operating expenses

.24

Fee waiver and/or expense reimbursement*

(.06)

Total annual fund operating expenses (after fee waiver and/or expense reimbursement)

.18

* The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, until May 31, 2025, to waive receipt of a portion of its management fee in the amount of .03% of the value of the fund's average daily net assets. In addition, BNY Mellon Investment Adviser, Inc. has contractually agreed, until May 31, 2025, to waive receipt of its fees and/or assume the direct expenses of the fund's SPARKSM shares so that the direct expenses of SPARKSM shares (excluding taxes, brokerage commissions and extraordinary expenses) do not exceed .18%. On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate the fee waiver agreement and/or expense limitation agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the fee waiver and expense limitation agreements by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

SPARKSM Shares

$18

$71

$129

$300

Wealth Shares Prospectus | Dreyfus Government Cash Management  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
  

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 

Wealth Shares

Management fees

.20

Other expenses:

 

Shareholder services fees

.25

Miscellaneous other expenses

.03

Total other expenses

.28

Total annual fund operating expenses

.48

Fee waiver*

(.03)

Total annual fund operating expenses (after fee waiver)

.45

* The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, until May 31, 2025, to waive receipt of a portion of its management fee in the amount of .03% of the value of the fund's average daily net assets. On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate this waiver agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the contractual undertaking by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Wealth Shares

$46

$151

$266

$601

Wealth Shares Prospectus | Dreyfus Treasury Obligations Cash Management  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
  

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 

Wealth Shares

Management fees

.20

Other expenses:

 

Shareholder services fees

.25

Miscellaneous other expenses

.01

Total other expenses

.26

Total annual fund operating expenses

.46

Fee waiver*

(.03)

Total annual fund operating expenses (after fee waiver)

.43

* The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, until May 31, 2025, to waive receipt of a portion of its management fee in the amount of .03% of the value of the fund's average daily net assets. On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate this waiver agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the contractual undertaking by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Wealth Shares

$44

$145

$255

$576

Wealth Shares Prospectus | DREYFUS TREASURY SECURITIES CASH MANAGEMENT  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
   

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

 

Wealth Shares

Management fees

.20

Other expenses:

 

Shareholder services fees

.25

Miscellaneous other expenses

.02

Total other expenses

.27

Total annual fund operating expenses

.47

Fee waiver*

(.03)

Total annual fund operating expenses (after fee waiver)

.44

* The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, until May 31, 2025, to waive receipt of a portion of its management fee in the amount of .03% of the value of the fund's average daily net assets. On or after May 31, 2025, BNY Mellon Investment Adviser, Inc. may terminate this waiver agreement at any time.

Expense Example [Heading] Example
Expense Example Narrative [Text Block]

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the contractual undertaking by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, With Redemption [Table]
     
 

1 Year

3 Years

5 Years

10 Years

Wealth Shares

$45

$148

$260

$589