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Shareholder Report
 6 Months Ended
Aug. 31, 2025
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSR
Amendment Flag false
Registrant Name Federated Hermes High Yield Trust
Entity Central Index Key 0000745967
Entity Investment Company Type N-1A
Document Period End Date Aug. 31, 2025
C000143970  
Shareholder Report [Line Items]  
Fund Name Federated Hermes Opportunistic High Yield Bond Fund
Class Name Class A Shares
Trading Symbol FHYAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Federated Hermes Opportunistic High Yield Bond Fund (the "Fund") for the period of March 1, 2025 to August 31, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
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)

Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class A Shares
$50
0.97%
Expenses Paid, Amount $ 50
Expense Ratio, Percent 0.97%
AssetsNet $ 435,127,978
Holdings Count | Holding 471
InvestmentCompanyPortfolioTurnover 12.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

  • Net Assets$435,127,978
  • Number of Investments471
  • Portfolio Turnover12%
Holdings [Text Block]

Top Index Classifications (% of Net Assets)

Group By Sector Chart
Value
Value
Independent Energy
4.0%
Chemicals
4.1%
Automotive
4.2%
Gaming
4.3%
Midstream
4.4%
Health Care
4.7%
Building Materials
4.8%
Cable Satellite
5.6%
Insurance - P&C
8.4%
Technology
12.2%
Material Fund Change [Text Block]
C000143971  
Shareholder Report [Line Items]  
Fund Name Federated Hermes Opportunistic High Yield Bond Fund
Class Name Class C Shares
Trading Symbol FHYCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Federated Hermes Opportunistic High Yield Bond Fund (the "Fund") for the period of March 1, 2025 to August 31, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
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)

Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class C Shares
$94
1.83%
Expenses Paid, Amount $ 94
Expense Ratio, Percent 1.83%
AssetsNet $ 435,127,978
Holdings Count | Holding 471
InvestmentCompanyPortfolioTurnover 12.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

  • Net Assets$435,127,978
  • Number of Investments471
  • Portfolio Turnover12%
Holdings [Text Block]

Top Index Classifications (% of Net Assets)

Group By Sector Chart
Value
Value
Independent Energy
4.0%
Chemicals
4.1%
Automotive
4.2%
Gaming
4.3%
Midstream
4.4%
Health Care
4.7%
Building Materials
4.8%
Cable Satellite
5.6%
Insurance - P&C
8.4%
Technology
12.2%
Material Fund Change [Text Block]
C000130168  
Shareholder Report [Line Items]  
Fund Name Federated Hermes Opportunistic High Yield Bond Fund
Class Name Institutional Shares
Trading Symbol FHTIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Federated Hermes Opportunistic High Yield Bond Fund (the "Fund") for the period of March 1, 2025 to August 31, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
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)

Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional Shares
$37
0.72%
Expenses Paid, Amount $ 37
Expense Ratio, Percent 0.72%
AssetsNet $ 435,127,978
Holdings Count | Holding 471
InvestmentCompanyPortfolioTurnover 12.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

  • Net Assets$435,127,978
  • Number of Investments471
  • Portfolio Turnover12%
Holdings [Text Block]

Top Index Classifications (% of Net Assets)

Group By Sector Chart
Value
Value
Independent Energy
4.0%
Chemicals
4.1%
Automotive
4.2%
Gaming
4.3%
Midstream
4.4%
Health Care
4.7%
Building Materials
4.8%
Cable Satellite
5.6%
Insurance - P&C
8.4%
Technology
12.2%
Material Fund Change [Text Block]
C000190443  
Shareholder Report [Line Items]  
Fund Name Federated Hermes Opportunistic High Yield Bond Fund
Class Name Class R6 Shares
Trading Symbol FHYLX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Federated Hermes Opportunistic High Yield Bond Fund (the "Fund") for the period of March 1, 2025 to August 31, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
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)

Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class R6 Shares
$37
0.71%
Expenses Paid, Amount $ 37
Expense Ratio, Percent 0.71%
AssetsNet $ 435,127,978
Holdings Count | Holding 471
InvestmentCompanyPortfolioTurnover 12.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

  • Net Assets$435,127,978
  • Number of Investments471
  • Portfolio Turnover12%
Holdings [Text Block]

Top Index Classifications (% of Net Assets)

Group By Sector Chart
Value
Value
Independent Energy
4.0%
Chemicals
4.1%
Automotive
4.2%
Gaming
4.3%
Midstream
4.4%
Health Care
4.7%
Building Materials
4.8%
Cable Satellite
5.6%
Insurance - P&C
8.4%
Technology
12.2%
Material Fund Change [Text Block]
C000024613  
Shareholder Report [Line Items]  
Fund Name Federated Hermes Opportunistic High Yield Bond Fund
Class Name Service Shares
Trading Symbol FHYTX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Federated Hermes Opportunistic High Yield Bond Fund (the "Fund") for the period of March 1, 2025 to August 31, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
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)

Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Shares
$50
0.97%
Expenses Paid, Amount $ 50
Expense Ratio, Percent 0.97%
AssetsNet $ 435,127,978
Holdings Count | Holding 471
InvestmentCompanyPortfolioTurnover 12.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

  • Net Assets$435,127,978
  • Number of Investments471
  • Portfolio Turnover12%
Holdings [Text Block]

Top Index Classifications (% of Net Assets)

Group By Sector Chart
Value
Value
Independent Energy
4.0%
Chemicals
4.1%
Automotive
4.2%
Gaming
4.3%
Midstream
4.4%
Health Care
4.7%
Building Materials
4.8%
Cable Satellite
5.6%
Insurance - P&C
8.4%
Technology
12.2%
Material Fund Change [Text Block]