This semi-annual shareholder report contains important information about the Federated Hermes California Municipal Cash Trust (the "Fund") for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information at FederatedHermes.com/us/FundInformation. You can also request this information by contacting us at 1-800-341-7400, Option 4, or your financial advisor.

Additional Information Phone Number

1-800-341-7400

Additional Information Website

FederatedHermes.com/us/FundInformation

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as an annualized percentage of a $10,000 investment
Capital Shares	$19	0.38%

Expenses Paid, Amount

$ 19

Expense Ratio, Percent

0.38%

AssetsNet

$ 2,074,608,039

Holdings Count | Holding

181

Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets$2,074,608,039
Number of Investments181

Holdings [Text Block]

Top Security Types (% of Net Assets)

Table Summary
Value	Value
Municipal Notes	9.7%
Commerical Paper	29.4%
Variable Rate Demand Instruments	60.8%

Effective Maturity Schedule (% of Net Assets)

Table Summary
Value	Value
181 Days or More	0.6%
91-180 Days	9.1%
31-90 Days	33.0%
8-30 Days	1.8%
1-7 Days	55.4%

Material Fund Change [Text Block]

C000026075

Shareholder Report [Line Items]

Fund Name

Federated Hermes California Municipal Cash Trust

Class Name

Cash II Shares

Trading Symbol

CALXX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Federated Hermes California Municipal Cash Trust (the "Fund") for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information at FederatedHermes.com/us/FundInformation. You can also request this information by contacting us at 1-800-341-7400, Option 4, or your financial advisor.

Additional Information Phone Number

1-800-341-7400

Additional Information Website

FederatedHermes.com/us/FundInformation

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as an annualized percentage of a $10,000 investment
Cash II Shares	$34	0.68%

Expenses Paid, Amount

$ 34

Expense Ratio, Percent

0.68%

AssetsNet

$ 2,074,608,039

Holdings Count | Holding

181

Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets$2,074,608,039
Number of Investments181

Holdings [Text Block]

Top Security Types (% of Net Assets)

Table Summary
Value	Value
Municipal Notes	9.7%
Commerical Paper	29.4%
Variable Rate Demand Instruments	60.8%

Effective Maturity Schedule (% of Net Assets)

Table Summary
Value	Value
181 Days or More	0.6%
91-180 Days	9.1%
31-90 Days	33.0%
8-30 Days	1.8%
1-7 Days	55.4%

Material Fund Change [Text Block]

C000026076

Shareholder Report [Line Items]

Fund Name

Federated Hermes California Municipal Cash Trust

Class Name

Cash Series Shares

Trading Symbol

CCSXX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Federated Hermes California Municipal Cash Trust (the "Fund") for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information at FederatedHermes.com/us/FundInformation. You can also request this information by contacting us at 1-800-341-7400, Option 4, or your financial advisor.

Additional Information Phone Number

1-800-341-7400

Additional Information Website

FederatedHermes.com/us/FundInformation

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as an annualized percentage of a $10,000 investment
Cash Series Shares	$51	1.03%

Expenses Paid, Amount

$ 51

Expense Ratio, Percent

1.03%

AssetsNet

$ 2,074,608,039

Holdings Count | Holding

181

Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets$2,074,608,039
Number of Investments181

Holdings [Text Block]

Top Security Types (% of Net Assets)

Table Summary
Value	Value
Municipal Notes	9.7%
Commerical Paper	29.4%
Variable Rate Demand Instruments	60.8%

Effective Maturity Schedule (% of Net Assets)

Table Summary
Value	Value
181 Days or More	0.6%
91-180 Days	9.1%
31-90 Days	33.0%
8-30 Days	1.8%
1-7 Days	55.4%

Material Fund Change [Text Block]

C000026078

Shareholder Report [Line Items]

Fund Name

Federated Hermes California Municipal Cash Trust

Class Name

Service Shares

Trading Symbol

CACXX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Federated Hermes California Municipal Cash Trust (the "Fund") for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information at FederatedHermes.com/us/FundInformation. You can also request this information by contacting us at 1-800-341-7400, Option 4, or your financial advisor.

Additional Information Phone Number

1-800-341-7400

Additional Information Website

FederatedHermes.com/us/FundInformation

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as an annualized percentage of a $10,000 investment
Service Shares	$26	0.53%

Expenses Paid, Amount

$ 26

Expense Ratio, Percent

0.53%

AssetsNet

$ 2,074,608,039

Holdings Count | Holding

181

Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets$2,074,608,039
Number of Investments181

Holdings [Text Block]

Top Security Types (% of Net Assets)

Table Summary
Value	Value
Municipal Notes	9.7%
Commerical Paper	29.4%
Variable Rate Demand Instruments	60.8%

Effective Maturity Schedule (% of Net Assets)

Table Summary
Value	Value
181 Days or More	0.6%
91-180 Days	9.1%
31-90 Days	33.0%
8-30 Days	1.8%
1-7 Days	55.4%

Material Fund Change [Text Block]

C000026079

Shareholder Report [Line Items]

Fund Name

Federated Hermes California Municipal Cash Trust

Class Name

Wealth Shares

Trading Symbol

CAIXX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Federated Hermes California Municipal Cash Trust (the "Fund") for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information at FederatedHermes.com/us/FundInformation. You can also request this information by contacting us at 1-800-341-7400, Option 4, or your financial advisor.

Additional Information Phone Number

1-800-341-7400

Additional Information Website

FederatedHermes.com/us/FundInformation

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as an annualized percentage of a $10,000 investment
Wealth Shares	$14	0.28%

Expenses Paid, Amount

$ 14

Expense Ratio, Percent

0.28%

AssetsNet

$ 2,074,608,039

Holdings Count | Holding

181

Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets$2,074,608,039
Number of Investments181

Holdings [Text Block]

Top Security Types (% of Net Assets)

Table Summary
Value	Value
Municipal Notes	9.7%
Commerical Paper	29.4%
Variable Rate Demand Instruments	60.8%

Effective Maturity Schedule (% of Net Assets)

Table Summary
Value	Value
181 Days or More	0.6%
91-180 Days	9.1%
31-90 Days	33.0%
8-30 Days	1.8%
1-7 Days	55.4%

Material Fund Change [Text Block]

C000167073

Shareholder Report [Line Items]

Fund Name

Federated Hermes Institutional Tax-Free Cash Trust

Class Name

Institutional Shares

Trading Symbol

FFTXX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Federated Hermes Institutional Tax-Free Cash Trust (the "Fund") for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information at FederatedHermes.com/us/FundInformation. You can also request this information by contacting us at 1-800-341-7400, Option 4, or your financial advisor.

Additional Information Phone Number

1-800-341-7400

Additional Information Website

FederatedHermes.com/us/FundInformation

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as an annualized percentage of a $10,000 investment
Institutional Shares	$10	0.20%

Expenses Paid, Amount

$ 10

Expense Ratio, Percent

0.20%

AssetsNet

$ 3,054,908,806

Holdings Count | Holding

148

Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets$3,054,908,806
Number of Investments148

Holdings [Text Block]

Top Security Types (% of Net Assets)

Table Summary
Value	Value
Variable Rate Demand Instruments	98.2%

Effective Maturity Schedule (% of Net Assets)

Table Summary
Value	Value
181 Days or More	0.0%
91-180 Days	0.0%
31-90 Days	0.0%
8-30 Days	0.0%
1-7 Days	98.2%

Material Fund Change [Text Block]

C000026054

Shareholder Report [Line Items]

Fund Name

Federated Hermes Institutional Tax-Free Cash Trust

Class Name

Premier Shares

Trading Symbol

FTFXX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Federated Hermes Institutional Tax-Free Cash Trust (the "Fund") for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information at FederatedHermes.com/us/FundInformation. You can also request this information by contacting us at 1-800-341-7400, Option 4, or your financial advisor.

Additional Information Phone Number

1-800-341-7400

Additional Information Website

FederatedHermes.com/us/FundInformation

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as an annualized percentage of a $10,000 investment
Premier Shares	$7	0.15%

Expenses Paid, Amount

$ 7

Expense Ratio, Percent

0.15%

AssetsNet

$ 3,054,908,806

Holdings Count | Holding

148

Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets$3,054,908,806
Number of Investments148

Holdings [Text Block]

Top Security Types (% of Net Assets)

Table Summary
Value	Value
Variable Rate Demand Instruments	98.2%

Effective Maturity Schedule (% of Net Assets)

Table Summary
Value	Value
181 Days or More	0.0%
91-180 Days	0.0%
31-90 Days	0.0%
8-30 Days	0.0%
1-7 Days	98.2%

Material Fund Change [Text Block]

C000026114

Shareholder Report [Line Items]

Fund Name

Federated Hermes New York Municipal Cash Trust

Class Name

Cash II Shares

Trading Symbol

NYCXX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Federated Hermes New York Municipal Cash Trust (the "Fund") for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information at FederatedHermes.com/us/FundInformation. You can also request this information by contacting us at 1-800-341-7400, Option 4, or your financial advisor.

Additional Information Phone Number

1-800-341-7400

Additional Information Website

FederatedHermes.com/us/FundInformation

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as an annualized percentage of a $10,000 investment
Cash II Shares	$38	0.77%

Expenses Paid, Amount

$ 38

Expense Ratio, Percent

0.77%

AssetsNet

$ 808,395,024

Holdings Count | Holding

124

Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets$808,395,024
Number of Investments124

Holdings [Text Block]

Top Security Types (% of Net Assets)

Table Summary
Value	Value
Municipal Notes	24.9%
Variable Rate Demand Instruments	75.1%

Effective Maturity Schedule (% of Net Assets)

Table Summary
Value	Value
181 Days or More	7.2%
91-180 Days	4.4%
31-90 Days	24.2%
8-30 Days	1.7%
1-7 Days	62.5%

Material Fund Change [Text Block]

C000026115

Shareholder Report [Line Items]

Fund Name

Federated Hermes New York Municipal Cash Trust

Class Name

Cash Series Shares

Trading Symbol

FNCXX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Federated Hermes New York Municipal Cash Trust (the "Fund") for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information at FederatedHermes.com/us/FundInformation. You can also request this information by contacting us at 1-800-341-7400, Option 4, or your financial advisor.

Additional Information Phone Number

1-800-341-7400

Additional Information Website

FederatedHermes.com/us/FundInformation

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as an annualized percentage of a $10,000 investment
Cash Series Shares	$51	1.02%

Expenses Paid, Amount

$ 51

Expense Ratio, Percent

1.02%

AssetsNet

$ 808,395,024

Holdings Count | Holding

124

Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets$808,395,024
Number of Investments124

Holdings [Text Block]

Top Security Types (% of Net Assets)

Table Summary
Value	Value
Municipal Notes	24.9%
Variable Rate Demand Instruments	75.1%

Effective Maturity Schedule (% of Net Assets)

Table Summary
Value	Value
181 Days or More	7.2%
91-180 Days	4.4%
31-90 Days	24.2%
8-30 Days	1.7%
1-7 Days	62.5%

Material Fund Change [Text Block]

C000026116

Shareholder Report [Line Items]

Fund Name

Federated Hermes New York Municipal Cash Trust

Class Name

Service Shares

Trading Symbol

FNTXX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Federated Hermes New York Municipal Cash Trust (the "Fund") for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information at FederatedHermes.com/us/FundInformation. You can also request this information by contacting us at 1-800-341-7400, Option 4, or your financial advisor.

Additional Information Phone Number

1-800-341-7400

Additional Information Website

FederatedHermes.com/us/FundInformation

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as an annualized percentage of a $10,000 investment
Service Shares	$27	0.54%

Expenses Paid, Amount

$ 27

Expense Ratio, Percent

0.54%

AssetsNet

$ 808,395,024

Holdings Count | Holding

124

Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets$808,395,024
Number of Investments124

Holdings [Text Block]

Top Security Types (% of Net Assets)

Table Summary
Value	Value
Municipal Notes	24.9%
Variable Rate Demand Instruments	75.1%

Effective Maturity Schedule (% of Net Assets)

Table Summary
Value	Value
181 Days or More	7.2%
91-180 Days	4.4%
31-90 Days	24.2%
8-30 Days	1.7%
1-7 Days	62.5%

Material Fund Change [Text Block]

C000026117

Shareholder Report [Line Items]

Fund Name

Federated Hermes New York Municipal Cash Trust

Class Name

Wealth Shares

Trading Symbol

NISXX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Federated Hermes New York Municipal Cash Trust (the "Fund") for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information at FederatedHermes.com/us/FundInformation. You can also request this information by contacting us at 1-800-341-7400, Option 4, or your financial advisor.

Additional Information Phone Number

1-800-341-7400

Additional Information Website

FederatedHermes.com/us/FundInformation

Expenses [Text Block]