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Cover Page - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2019
Feb. 14, 2020
Jun. 30, 2019
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2019    
Document Transition Report false    
Entity File Number 1-14818    
Entity Registrant Name FEDERATED HERMES, INC.    
Entity Incorporation, State or Country Code PA    
Entity Tax Identification Number 25-1111467    
Entity Address, Address Line One 1001 Liberty Avenue    
Entity Address, City or Town Pittsburgh,    
Entity Address, State or Province PA    
Entity Address, Postal Zip Code 15222-3779    
City Area Code 412    
Local Phone Number 288-1900    
Title of 12(b) Security Class B common stock, no par value    
Trading Symbol FHI    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 3.1
Documents Incorporated by Reference
Part III of this Form 10-K incorporates by reference certain information from the registrant's 2020 Information Statement.
    
Entity Central Index Key 0001056288    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Amendment Flag false    
Class A      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   9,000  
Class B      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   101,117,928