Basis of Presentation (Policies)	9 Months Ended
Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Federated Hermes, Inc. and its consolidated subsidiaries (collectively, Federated Hermes) provide investment advisory, administrative, distribution and other services to various investment products, including sponsored investment companies, collective funds and other funds (Federated Hermes Funds) and Separate Accounts (which include separately managed accounts, institutional accounts, certain sub-advised funds and other managed products) in both domestic and international markets. In addition, Federated Hermes markets and provides stewardship and real estate development services to various domestic and international companies. The interim Consolidated Financial Statements of Federated Hermes included herein have been prepared in accordance with U.S. generally accepted accounting principles (GAAP). In the opinion of management, the financial statements reflect all adjustments that are of a normal recurring nature and necessary for a fair presentation of the results for the interim periods presented.
Use of Estimates	In preparing the financial statements, management is required to make estimates and assumptions that affect the amounts reported in the Consolidated Financial Statements and accompanying notes. Actual results may differ from those estimates, and such differences may be material to the Consolidated Financial Statements.
Consolidation of Variable Interest Entities	Federated Hermes has a controlling financial interest in a VIE and is, therefore, deemed to be the primary beneficiary of a VIE if it has (1) the power to direct the activities of a VIE that most significantly impact the VIE's economic performance and (2) the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE. Financial information for certain entities, whose primary purpose is to collect and distribute carried interest paid by foreign private equity and infrastructure funds, is not available timely and is therefore consolidated on a one quarter lag, adjusted for any known material carried interest revenue and compensation transactions occurring through the balance sheet date.
Fair Value Measurements	Fair value is the price that would be received to sell an asset or the price that would be paid to transfer a liability as of the measurement date. A fair-value reporting hierarchy exists for disclosure of fair value measurements based on the observability of the inputs to the valuation of financial assets and liabilities. The levels are: Level 1 – Quoted prices for identical instruments in active markets. Level 1 assets may include equity and debt securities that are traded in an active exchange market, including shares of mutual funds. Level 2 – Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets. Level 2 assets and liabilities may include debt and equity securities, purchased loans and over-the-counter derivative contracts whose fair value is determined using a pricing model without significant unobservable market data inputs. Level 3 – Valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable in active markets. NAV Practical Expedient – Investments that calculate NAV per share (or its equivalent) as a practical expedient. These investments have been excluded from the fair value hierarchy.

Basis of Presentation (Policies)

9 Months Ended

Sep. 30, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Federated Hermes, Inc. and its consolidated subsidiaries (collectively, Federated Hermes) provide investment advisory, administrative, distribution and other services to various investment products, including sponsored investment companies, collective funds and other funds (Federated Hermes Funds) and Separate Accounts (which include separately managed accounts, institutional accounts, certain sub-advised funds and other managed products) in both domestic and international markets. In addition, Federated Hermes markets and provides stewardship and real estate development services to various domestic and international companies. The interim Consolidated Financial Statements of Federated Hermes included herein have been prepared in accordance with U.S. generally accepted accounting principles (GAAP). In the opinion of management, the financial statements reflect all adjustments that are of a normal recurring nature and necessary for a fair presentation of the results for the interim periods presented.

Use of Estimates

In preparing the financial statements, management is required to make estimates and assumptions that affect the amounts reported in the Consolidated Financial Statements and accompanying notes. Actual results may differ from those estimates, and such differences may be material to the Consolidated Financial Statements.

Consolidation of Variable Interest Entities

Federated Hermes has a controlling financial interest in a VIE and is, therefore, deemed to be the primary beneficiary of a VIE if it has (1) the power to direct the activities of a VIE that most significantly impact the VIE's economic performance and (2) the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE. Financial information for certain entities, whose primary purpose is to collect and distribute carried interest paid by foreign private equity and infrastructure funds, is not available timely and is therefore consolidated on a one quarter lag, adjusted for any known material carried interest revenue and compensation transactions occurring through the balance sheet date.

Fair Value Measurements

Fair value is the price that would be received to sell an asset or the price that would be paid to transfer a liability as of the measurement date. A fair-value reporting hierarchy exists for disclosure of fair value measurements based on the observability of the inputs to the valuation of financial assets and liabilities. The levels are:

Level 1 – Quoted prices for identical instruments in active markets. Level 1 assets may include equity and debt securities that are traded in an active exchange market, including shares of mutual funds.

Level 2 – Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets. Level 2 assets and liabilities may include debt and equity securities, purchased loans and over-the-counter derivative contracts whose fair value is determined using a pricing model without significant unobservable market data inputs.

Level 3 – Valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable in active markets.

NAV Practical Expedient – Investments that calculate NAV per share (or its equivalent) as a practical expedient. These investments have been excluded from the fair value hierarchy.