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Federated Hermes High Income Bond Fund 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%
Service Shares [Member] | Bloomberg US Aggregate Bond Index(reflects no deduction for fees, expenses or taxes)[Member]      
Prospectus [Line Items]      
Average Annual Return, Percent [2],[3] 7.30% (0.36%) 2.01%
Service Shares [Member] | Bloomberg US Corporate High Yield 2% Issuer Capped Index(reflects no deduction for fees, expenses or taxes)[Member]      
Prospectus [Line Items]      
Average Annual Return, Percent [4] 8.62% 4.50% 6.52%
Service Shares [Member] | Lipper Variable Underlying High Yield Funds Average[Member]      
Prospectus [Line Items]      
Average Annual Return, Percent [5] 7.79% 4.30% 5.61%
Service Shares [Member] | S      
Prospectus [Line Items]      
Average Annual Return, Percent 8.18% 3.45% 5.33%
[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] 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.
[3] 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.
[4] The Bloomberg US Corporate High-Yield 2% Issuer Capped Index is an issuer-constrained version of the Bloomberg US Corporate High-Yield Index that measures the market of U.S. dollar denominated, noninvestment-grade, fixed-rate, taxable corporate bonds. The index follows the same rules as the uncapped index but limits the exposure of each issuer to 2% of the total market value and redistributes any excess market value index-wide on a pro-rata basis.
[5] Lipper figures represent the average total returns reported by all of the funds serving as underlying investment options for variable insurance contracts designated by Lipper, Inc. as falling into the category indicated. They do not reflect sales charges.