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Shareholder Report
6 Months Ended
Nov. 30, 2024
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Federated Hermes Money Market Obligations Trust
Entity Central Index Key 0000856517
Entity Investment Company Type N-1A
Document Period End Date Nov. 30, 2024
C000157044  
Shareholder Report [Line Items]  
Fund Name Federated Hermes Municipal Obligations Fund
Class Name Automated Shares
Trading Symbol MOTXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Federated Hermes Municipal Obligations Fund (the "Fund") for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
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)

Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Automated Shares
$24
0.47%
Expenses Paid, Amount $ 24
Expense Ratio, Percent 0.47%
AssetsNet $ 5,725,711,761
Holdings Count | Holding 373
Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets
$5,725,711,761
Number of Investments
373
Holdings [Text Block]

Top Security Types (% of Net Assets)

Group By Sector Chart
Value
Value
Commerical Paper
6.5%
Municipal Notes
16.1%
Variable Rate Demand Instruments
77.6%

Effective Maturity Schedule (% of Net Assets)

Group By Maturity Chart
Value
Value
181 Days or More
7.4%
91-180 Days
2.3%
31-90 Days
21.1%
8-30 Days
5.3%
1-7 Days
64.1%
Material Fund Change [Text Block]
C000026110  
Shareholder Report [Line Items]  
Fund Name Federated Hermes Municipal Obligations Fund
Class Name Capital Shares
Trading Symbol MFCXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Federated Hermes Municipal Obligations Fund (the "Fund") for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
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)

Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Capital Shares
$16
0.31%
Expenses Paid, Amount $ 16
Expense Ratio, Percent 0.31%
AssetsNet $ 5,725,711,761
Holdings Count | Holding 373
Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets
$5,725,711,761
Number of Investments
373
Holdings [Text Block]

Top Security Types (% of Net Assets)

Group By Sector Chart
Value
Value
Commerical Paper
6.5%
Municipal Notes
16.1%
Variable Rate Demand Instruments
77.6%

Effective Maturity Schedule (% of Net Assets)

Group By Maturity Chart
Value
Value
181 Days or More
7.4%
91-180 Days
2.3%
31-90 Days
21.1%
8-30 Days
5.3%
1-7 Days
64.1%
Material Fund Change [Text Block]
C000157041  
Shareholder Report [Line Items]  
Fund Name Federated Hermes Municipal Obligations Fund
Class Name Cash II Shares
Trading Symbol MODXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Federated Hermes Municipal Obligations Fund (the "Fund") for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
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)

Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Cash II Shares
$46
0.91%
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.91%
AssetsNet $ 5,725,711,761
Holdings Count | Holding 373
Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets
$5,725,711,761
Number of Investments
373
Holdings [Text Block]

Top Security Types (% of Net Assets)

Group By Sector Chart
Value
Value
Commerical Paper
6.5%
Municipal Notes
16.1%
Variable Rate Demand Instruments
77.6%

Effective Maturity Schedule (% of Net Assets)

Group By Maturity Chart
Value
Value
181 Days or More
7.4%
91-180 Days
2.3%
31-90 Days
21.1%
8-30 Days
5.3%
1-7 Days
64.1%
Material Fund Change [Text Block]
C000157042  
Shareholder Report [Line Items]  
Fund Name Federated Hermes Municipal Obligations Fund
Class Name Cash Series Shares
Trading Symbol MFSXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Federated Hermes Municipal Obligations Fund (the "Fund") for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
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)

Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Cash Series Shares
$51
1.02%
Expenses Paid, Amount $ 51
Expense Ratio, Percent 1.02%
AssetsNet $ 5,725,711,761
Holdings Count | Holding 373
Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets
$5,725,711,761
Number of Investments
373
Holdings [Text Block]

Top Security Types (% of Net Assets)

Group By Sector Chart
Value
Value
Commerical Paper
6.5%
Municipal Notes
16.1%
Variable Rate Demand Instruments
77.6%

Effective Maturity Schedule (% of Net Assets)

Group By Maturity Chart
Value
Value
181 Days or More
7.4%
91-180 Days
2.3%
31-90 Days
21.1%
8-30 Days
5.3%
1-7 Days
64.1%
Material Fund Change [Text Block]
C000157043  
Shareholder Report [Line Items]  
Fund Name Federated Hermes Municipal Obligations Fund
Class Name Investment Shares
Trading Symbol MOIXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Federated Hermes Municipal Obligations Fund (the "Fund") for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
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)

Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Investment Shares
$35
0.70%
Expenses Paid, Amount $ 35
Expense Ratio, Percent 0.70%
AssetsNet $ 5,725,711,761
Holdings Count | Holding 373
Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets
$5,725,711,761
Number of Investments
373
Holdings [Text Block]

Top Security Types (% of Net Assets)

Group By Sector Chart
Value
Value
Commerical Paper
6.5%
Municipal Notes
16.1%
Variable Rate Demand Instruments
77.6%

Effective Maturity Schedule (% of Net Assets)

Group By Maturity Chart
Value
Value
181 Days or More
7.4%
91-180 Days
2.3%
31-90 Days
21.1%
8-30 Days
5.3%
1-7 Days
64.1%
Material Fund Change [Text Block]
C000026109  
Shareholder Report [Line Items]  
Fund Name Federated Hermes Municipal Obligations Fund
Class Name Service Shares
Trading Symbol MOSXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Federated Hermes Municipal Obligations Fund (the "Fund") for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
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)

Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Shares
$23
0.46%
Expenses Paid, Amount $ 23
Expense Ratio, Percent 0.46%
AssetsNet $ 5,725,711,761
Holdings Count | Holding 373
Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets
$5,725,711,761
Number of Investments
373
Holdings [Text Block]

Top Security Types (% of Net Assets)

Group By Sector Chart
Value
Value
Commerical Paper
6.5%
Municipal Notes
16.1%
Variable Rate Demand Instruments
77.6%

Effective Maturity Schedule (% of Net Assets)

Group By Maturity Chart
Value
Value
181 Days or More
7.4%
91-180 Days
2.3%
31-90 Days
21.1%
8-30 Days
5.3%
1-7 Days
64.1%
Material Fund Change [Text Block]
C000026108  
Shareholder Report [Line Items]  
Fund Name Federated Hermes Municipal Obligations Fund
Class Name Wealth Shares
Trading Symbol MOFXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Federated Hermes Municipal Obligations Fund (the "Fund") for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
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)

Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Wealth Shares
$11
0.21%
Expenses Paid, Amount $ 11
Expense Ratio, Percent 0.21%
AssetsNet $ 5,725,711,761
Holdings Count | Holding 373
Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets
$5,725,711,761
Number of Investments
373
Holdings [Text Block]

Top Security Types (% of Net Assets)

Group By Sector Chart
Value
Value
Commerical Paper
6.5%
Municipal Notes
16.1%
Variable Rate Demand Instruments
77.6%

Effective Maturity Schedule (% of Net Assets)

Group By Maturity Chart
Value
Value
181 Days or More
7.4%
91-180 Days
2.3%
31-90 Days
21.1%
8-30 Days
5.3%
1-7 Days
64.1%
Material Fund Change [Text Block]
C000190788  
Shareholder Report [Line Items]  
Fund Name Federated Hermes Tax-Free Obligations Fund
Class Name Advisor Shares
Trading Symbol TBVXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Federated Hermes Tax-Free Obligations Fund (the "Fund") for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
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)

Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Advisor Shares
$11
0.21%
Expenses Paid, Amount $ 11
Expense Ratio, Percent 0.21%
AssetsNet $ 5,342,263,507
Holdings Count | Holding 343
Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets
$5,342,263,507
Number of Investments
343
Holdings [Text Block]

Top Security Types (% of Net Assets)

Group By Sector Chart
Value
Value
Municipal Notes
12.2%
Commerical Paper
20.1%
Variable Rate Demand Instruments
68.6%

Effective Maturity Schedule (% of Net Assets)

Group By Maturity Chart
Value
Value
181 Days or More
7.5%
91-180 Days
4.5%
31-90 Days
21.4%
8-30 Days
8.7%
1-7 Days
58.8%
Material Fund Change [Text Block]
C000026165  
Shareholder Report [Line Items]  
Fund Name Federated Hermes Tax-Free Obligations Fund
Class Name Service Shares
Trading Symbol TBSXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Federated Hermes Tax-Free Obligations Fund (the "Fund") for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
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)

Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Shares
$23
0.46%
Expenses Paid, Amount $ 23
Expense Ratio, Percent 0.46%
AssetsNet $ 5,342,263,507
Holdings Count | Holding 343
Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets
$5,342,263,507
Number of Investments
343
Holdings [Text Block]

Top Security Types (% of Net Assets)

Group By Sector Chart
Value
Value
Municipal Notes
12.2%
Commerical Paper
20.1%
Variable Rate Demand Instruments
68.6%

Effective Maturity Schedule (% of Net Assets)

Group By Maturity Chart
Value
Value
181 Days or More
7.5%
91-180 Days
4.5%
31-90 Days
21.4%
8-30 Days
8.7%
1-7 Days
58.8%
Material Fund Change [Text Block]
C000026164  
Shareholder Report [Line Items]  
Fund Name Federated Hermes Tax-Free Obligations Fund
Class Name Wealth Shares
Trading Symbol TBIXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Federated Hermes Tax-Free Obligations Fund (the "Fund") for the period of June 1, 2024 to November 30, 2024.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
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)

Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Wealth Shares
$11
0.21%
Expenses Paid, Amount $ 11
Expense Ratio, Percent 0.21%
AssetsNet $ 5,342,263,507
Holdings Count | Holding 343
Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets
$5,342,263,507
Number of Investments
343
Holdings [Text Block]

Top Security Types (% of Net Assets)

Group By Sector Chart
Value
Value
Municipal Notes
12.2%
Commerical Paper
20.1%
Variable Rate Demand Instruments
68.6%

Effective Maturity Schedule (% of Net Assets)

Group By Maturity Chart
Value
Value
181 Days or More
7.5%
91-180 Days
4.5%
31-90 Days
21.4%
8-30 Days
8.7%
1-7 Days
58.8%
Material Fund Change [Text Block]