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Federated Hermes Fund for U.S. Government Securities II Average Annual Total Returns
 12 Months Ended 60 Months Ended 120 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Bloomberg US Aggregate Bond Index(reflects no deduction for fees, expenses or taxes)[Member]      
Prospectus [Line Items]      
Average Annual Return, Percent [1] 7.30% (0.36%) 2.01%
67% Bloomberg US Mortgage Backed Securities Index/33% Bloomberg US Government Bond Index(reflects no deduction for fees, expenses or taxes)[Member]      
Prospectus [Line Items]      
Average Annual Return, Percent [2] 7.83% (0.21%) 1.53%
Federated Hermes Fund for U.S. Government Securities II      
Prospectus [Line Items]      
Average Annual Return, Percent 6.80% (0.84%) 1.06%
[1] The Bloomberg US Aggregate Bond Index is a broad-based benchmark that measures the investment-grade, U.S. dollar denominated, fixed-rate taxable bond market, including Treasuries, government-related and corporate securities, mortgage-backed securities (agency fixed-rate and hybrid ARM pass-throughs), asset-backed securities and commercial mortgage-backed securities.
[2] A custom blended index comprised of 67% of the return of the Bloomberg US Mortgage Backed Securities Index and 33% of the return of the Bloomberg US Government Bond Index.