v3.26.1
Shareholder Report, Line Graph (Details) - USD ($)
 12 Months Ended 24 Months Ended 36 Months Ended 48 Months Ended 60 Months Ended 72 Months Ended 84 Months Ended 96 Months Ended 108 Months Ended 120 Months Ended
May 31, 2016
May 31, 2026
May 31, 2017
May 31, 2018
May 31, 2019
May 31, 2020
May 31, 2021
May 31, 2022
May 31, 2023
May 31, 2024
May 31, 2025
May 31, 2026
C000026761                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Class A Shares                    
Accumulated Value $ 10,000   $ 10,037 $ 10,124 $ 10,294 $ 10,491 $ 10,525 $ 10,457 $ 10,746 $ 11,323 $ 11,889 $ 12,439
C000026763                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Institutional Shares                    
Accumulated Value 10,000   10,081 10,214 10,432 10,653 10,714 10,656 10,956 11,562 12,157 12,751
C000168177                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Class R6 Shares                    
Accumulated Value 10,000   10,083 10,208 10,438 10,661 10,713 10,669 10,983 11,580 12,179 12,764
C000026762                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Service Shares                    
Accumulated Value 10,000   10,071 10,193 10,401 10,622 10,661 10,605 10,893 11,484 12,064 12,641
FEDERATED INDEX: Bloomberg US Aggregate Bond Index                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Bloomberg US Aggregate Bond Index                    
Accumulated Value 10,000   10,158 10,120 10,768 11,781 11,734 10,769 10,538 10,676 11,258 11,836
FEDERATED INDEX: Bloomberg US Aggregate Bond Index                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Bloomberg US Aggregate Bond Index                    
Accumulated Value 10,000   10,158 10,120 10,768 11,781 11,734 10,769 10,538 10,676 11,258 11,836
FEDERATED INDEX: Bloomberg US Aggregate Bond Index                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Bloomberg US Aggregate Bond Index                    
Accumulated Value 10,000   10,158 10,120 10,768 11,781 11,734 10,769 10,538 10,676 11,258 11,836
FEDERATED INDEX: Bloomberg US Aggregate Bond Index                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Bloomberg US Aggregate Bond Index                    
Accumulated Value 10,000   10,158 10,120 10,768 11,781 11,734 10,769 10,538 10,676 11,258 11,836
FEDERATED INDEX: ICE BofA US 6-Month Treasury Bill Index                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   ICE BofA US 6-Month Treasury Bill Index                    
Accumulated Value 10,000   10,065 10,198 10,443 10,691 10,711 10,720 11,048 11,658 12,227 12,713
FEDERATED INDEX: ICE BofA US 6-Month Treasury Bill Index                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   ICE BofA US 6-Month Treasury Bill Index                    
Accumulated Value 10,000   10,065 10,198 10,443 10,691 10,711 10,720 11,048 11,658 12,227 12,713
FEDERATED INDEX: ICE BofA US 6-Month Treasury Bill Index                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   ICE BofA US 6-Month Treasury Bill Index                    
Accumulated Value 10,000   10,065 10,198 10,443 10,691 10,711 10,720 11,048 11,658 12,227 12,713
FEDERATED INDEX: ICE BofA US 6-Month Treasury Bill Index                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   ICE BofA US 6-Month Treasury Bill Index                    
Accumulated Value $ 10,000   $ 10,065 $ 10,198 $ 10,443 $ 10,691 $ 10,711 $ 10,720 $ 11,048 $ 11,658 $ 12,227 $ 12,713