Basis of Presentation (Policies)	9 Months Ended
Sep. 30, 2020
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 and other funds (Federated Hermes Funds) and Separate Accounts (which include separately managed accounts, institutional accounts, sub-advised funds and other managed products) in both domestic and international markets, as well as stewardship and real estate development services. 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.
Recently Adopted Accounting Guidance	Recently Adopted Accounting Guidance Credit Losses On June 16, 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The amendments in this update replace the incurred loss impairment methodology with a current expected credit loss (CECL) model. CECL requires an entity to estimate lifetime expected credit losses based on relevant information about historical events, current conditions and reasonable and supportable forecasts. Federated Hermes adopted Topic 326 on January 1, 2020 using the modified retrospective adoption method. The adoption did not have a material impact on Federated Hermes' Consolidated Financial Statements. Fair Value Measurement On August 28, 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement. The amendments in this update remove, modify or add disclosure requirements for fair value measurements to improve the effectiveness of disclosures. Federated Hermes adopted Topic 820 on January 1, 2020 using either the prospective or retrospective adoption method, depending on the amendment. The adoption did not have a material impact on Federated Hermes' Consolidated Financial Statements. Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement On August 29, 2018, the FASB issued ASU 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (a consensus of the FASB Emerging Issues Task Force). The amendments in this update align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). Federated Hermes adopted this guidance on January 1, 2020 using the prospective adoption method, which did not require the restatement of prior years. The adoption did not have a material impact on Federated Hermes' Consolidated Financial Statements.
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, 2020

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 and other funds (Federated Hermes Funds) and Separate Accounts (which include separately managed accounts, institutional accounts, sub-advised funds and other managed products) in both domestic and international markets, as well as stewardship and real estate development services. 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.

Recently Adopted Accounting Guidance

Credit Losses

On June 16, 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The amendments in this update replace the incurred loss impairment methodology with a current expected credit loss (CECL) model. CECL requires an entity to estimate lifetime expected credit losses based on relevant information about historical events, current conditions and reasonable and supportable forecasts. Federated Hermes adopted Topic 326 on January 1, 2020 using the modified retrospective adoption method. The adoption did not have a material impact on Federated Hermes' Consolidated Financial Statements.

Fair Value Measurement

On August 28, 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement. The amendments in this update remove, modify or add disclosure requirements for fair value measurements to improve the effectiveness of disclosures. Federated Hermes adopted Topic 820 on January 1, 2020 using either the prospective or retrospective adoption method, depending on the amendment. The adoption did not have a material impact on Federated Hermes' Consolidated Financial Statements.

Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement

On August 29, 2018, the FASB issued ASU 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (a consensus of the FASB Emerging Issues Task Force). The amendments in this update align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). Federated Hermes adopted this guidance on January 1, 2020 using the prospective adoption method, which did not require the restatement of prior years. The adoption did not have a material impact on Federated Hermes' Consolidated Financial Statements.

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.