v3.25.2
Shareholder Report
 6 Months Ended
Jul. 31, 2025
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSR
Amendment Flag false
Registrant Name Federated Hermes Short-Intermediate Government Trust
Entity Central Index Key 0000357159
Entity Investment Company Type N-1A
Document Period End Date Jul. 31, 2025
C000024572  
Shareholder Report [Line Items]  
Fund Name Federated Hermes Short-Intermediate Government Fund
Class Name Institutional Shares
Trading Symbol FIGTX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Federated Hermes Short-Intermediate Government Fund (the "Fund") for the period of February 1, 2025 to July 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
$30
0.59%
Expenses Paid, Amount $ 30
Expense Ratio, Percent 0.59%
AssetsNet $ 102,831,141
Holdings Count | Holding 42
InvestmentCompanyPortfolioTurnover 25.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

  • Net Assets$102,831,141
  • Number of Investments42
  • Portfolio Turnover25%
Holdings [Text Block]

Top Security Types (% of Net Assets)

Group By Sector Chart
Value
Value
Cash Equivalents
1.3%
Mortgage-Backed Securities
6.4%
Collaterized Mortgage Obligations
14.4%
U.S. Treasury Securities
77.2%

Effective Maturity Schedule (% of Net Assets)

Group By Maturity Chart
Value
Value
Greater than 5 Years
9.9%
2-5 Years
73.5%
Less than 2 Years
14.6%
Material Fund Change [Text Block]
C000024571  
Shareholder Report [Line Items]  
Fund Name Federated Hermes Short-Intermediate Government Fund
Class Name Class R Shares
Trading Symbol FIGKX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Federated Hermes Short-Intermediate Government Fund (the "Fund") for the period of February 1, 2025 to July 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 R Shares
$66
1.31%
Expenses Paid, Amount $ 66
Expense Ratio, Percent 1.31%
AssetsNet $ 102,831,141
Holdings Count | Holding 42
InvestmentCompanyPortfolioTurnover 25.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

  • Net Assets$102,831,141
  • Number of Investments42
  • Portfolio Turnover25%
Holdings [Text Block]

Top Security Types (% of Net Assets)

Group By Sector Chart
Value
Value
Cash Equivalents
1.3%
Mortgage-Backed Securities
6.4%
Collaterized Mortgage Obligations
14.4%
U.S. Treasury Securities
77.2%

Effective Maturity Schedule (% of Net Assets)

Group By Maturity Chart
Value
Value
Greater than 5 Years
9.9%
2-5 Years
73.5%
Less than 2 Years
14.6%
Material Fund Change [Text Block]
C000024573  
Shareholder Report [Line Items]  
Fund Name Federated Hermes Short-Intermediate Government Fund
Class Name Service Shares
Trading Symbol FIGIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Federated Hermes Short-Intermediate Government Fund (the "Fund") for the period of February 1, 2025 to July 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
$41
0.82%
Expenses Paid, Amount $ 41
Expense Ratio, Percent 0.82%
AssetsNet $ 102,831,141
Holdings Count | Holding 42
InvestmentCompanyPortfolioTurnover 25.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

  • Net Assets$102,831,141
  • Number of Investments42
  • Portfolio Turnover25%
Holdings [Text Block]

Top Security Types (% of Net Assets)

Group By Sector Chart
Value
Value
Cash Equivalents
1.3%
Mortgage-Backed Securities
6.4%
Collaterized Mortgage Obligations
14.4%
U.S. Treasury Securities
77.2%

Effective Maturity Schedule (% of Net Assets)

Group By Maturity Chart
Value
Value
Greater than 5 Years
9.9%
2-5 Years
73.5%
Less than 2 Years
14.6%
Material Fund Change [Text Block]