v3.26.3
Shareholder Report
 6 Months Ended
Aug. 31, 2026
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, 2026
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
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, 2026 to August 31, 2026.
Additional Information [Text Block] You can find additional information at FederatedHermes.com/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/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
Class A Shares
$50
0.98%
Expenses Paid, Amount $ 50
Expense Ratio, Percent 0.98%
AssetsNet $ 403,838,974
Holdings Count | Holding 474
InvestmentCompanyPortfolioTurnover 14.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

  • Net Assets$403,838,974
  • Number of Investments474
  • Portfolio Turnover14%
Holdings [Text Block]

Top Index Classifications (% of Net Assets)

Group By Sector Chart
Table Summary
Value
Value
Independent Energy
3.1%
Automotive
3.3%
Building Materials
3.9%
Midstream
4.0%
Gaming
4.2%
Health Care
4.3%
Cable Satellite
4.5%
Chemicals
5.2%
Insurance - P&C
9.6%
Technology
15.6%
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, 2026 to August 31, 2026.
Additional Information [Text Block] You can find additional information at FederatedHermes.com/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/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
Class C Shares
$93
1.83%
Expenses Paid, Amount $ 93
Expense Ratio, Percent 1.83%
AssetsNet $ 403,838,974
Holdings Count | Holding 474
InvestmentCompanyPortfolioTurnover 14.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

  • Net Assets$403,838,974
  • Number of Investments474
  • Portfolio Turnover14%
Holdings [Text Block]

Top Index Classifications (% of Net Assets)

Group By Sector Chart
Table Summary
Value
Value
Independent Energy
3.1%
Automotive
3.3%
Building Materials
3.9%
Midstream
4.0%
Gaming
4.2%
Health Care
4.3%
Cable Satellite
4.5%
Chemicals
5.2%
Insurance - P&C
9.6%
Technology
15.6%
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, 2026 to August 31, 2026.
Additional Information [Text Block] You can find additional information at FederatedHermes.com/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/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
$37
0.73%
Expenses Paid, Amount $ 37
Expense Ratio, Percent 0.73%
AssetsNet $ 403,838,974
Holdings Count | Holding 474
InvestmentCompanyPortfolioTurnover 14.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

  • Net Assets$403,838,974
  • Number of Investments474
  • Portfolio Turnover14%
Holdings [Text Block]

Top Index Classifications (% of Net Assets)

Group By Sector Chart
Table Summary
Value
Value
Independent Energy
3.1%
Automotive
3.3%
Building Materials
3.9%
Midstream
4.0%
Gaming
4.2%
Health Care
4.3%
Cable Satellite
4.5%
Chemicals
5.2%
Insurance - P&C
9.6%
Technology
15.6%
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, 2026 to August 31, 2026.
Additional Information [Text Block] You can find additional information at FederatedHermes.com/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/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
Class R6 Shares
$37
0.72%
Expenses Paid, Amount $ 37
Expense Ratio, Percent 0.72%
AssetsNet $ 403,838,974
Holdings Count | Holding 474
InvestmentCompanyPortfolioTurnover 14.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

  • Net Assets$403,838,974
  • Number of Investments474
  • Portfolio Turnover14%
Holdings [Text Block]

Top Index Classifications (% of Net Assets)

Group By Sector Chart
Table Summary
Value
Value
Independent Energy
3.1%
Automotive
3.3%
Building Materials
3.9%
Midstream
4.0%
Gaming
4.2%
Health Care
4.3%
Cable Satellite
4.5%
Chemicals
5.2%
Insurance - P&C
9.6%
Technology
15.6%
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, 2026 to August 31, 2026.
Additional Information [Text Block] You can find additional information at FederatedHermes.com/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/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
$50
0.98%
Expenses Paid, Amount $ 50
Expense Ratio, Percent 0.98%
AssetsNet $ 403,838,974
Holdings Count | Holding 474
InvestmentCompanyPortfolioTurnover 14.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

  • Net Assets$403,838,974
  • Number of Investments474
  • Portfolio Turnover14%
Holdings [Text Block]

Top Index Classifications (% of Net Assets)

Group By Sector Chart
Table Summary
Value
Value
Independent Energy
3.1%
Automotive
3.3%
Building Materials
3.9%
Midstream
4.0%
Gaming
4.2%
Health Care
4.3%
Cable Satellite
4.5%
Chemicals
5.2%
Insurance - P&C
9.6%
Technology
15.6%
Material Fund Change [Text Block]