Business Combinations (Notes)	6 Months Ended
Jun. 30, 2018
Business Combinations [Abstract]
Business Combination Disclosure [Text Block]	Business Combinations On April 12, 2018, Federated entered into an agreement to acquire a majority interest in Hermes Fund Managers Limited (Hermes) from BT Pension Scheme (BTPS). The addition of London-based Hermes, which has had multi-year significant asset growth, will further accelerate Federated's growth in markets outside of the U.S. On July 2, 2018, Federated completed, effective as of July 1, 2018, the acquisition of a 60 percent majority interest in Hermes (Hermes Acquisition). BTPS retained a 29.5 percent interest in Hermes and contributed the remaining 10.5 percent interest into an employee benefit trust for the benefit of certain members of Hermes' management and other key employees under a new long-term incentive plan. Federated paid a total of £259.9 million ($343.3 million) which included £246 million for the previously announced cost of the acquisition and an additional £13.9 million primarily for Federated's 60 percent share of Hermes' estimated excess regulatory capital. Federated funded the transaction through a combination of cash and an $18.0 million drawdown from its existing revolving credit facility (see Note (11) for additional information). Federated has incurred $4.6 million in transaction costs directly attributable to the Hermes Acquisition. Of this amount, $2.8 million has been expensed to date in 2018, primarily recorded in Professional Service Fees on the Consolidated Statements of Income. The transaction costs exclude a derivative loss (see Note (10) for additional information) and a $1.7 million foreign exchange gain recognized in the second quarter of 2018 as a result of holding British pound sterling at quarter end. Federated anticipates future transaction costs of approximately $16 million, of which approximately $11 million may be recorded in the third quarter of 2018. Actual results may differ from these estimates, and such differences may be material to the Consolidated Financial Statements. Due to the timing of the Hermes Acquisition, the information necessary to complete the preliminary purchase price allocation and pro forma financial results are not yet available. This information will be available in connection with third quarter 2018 reporting.

Business Combinations

On April 12, 2018, Federated entered into an agreement to acquire a majority interest in Hermes Fund Managers Limited (Hermes) from BT Pension Scheme (BTPS). The addition of London-based Hermes, which has had multi-year significant asset growth, will further accelerate Federated's growth in markets outside of the U.S.

On July 2, 2018, Federated completed, effective as of July 1, 2018, the acquisition of a 60 percent majority interest in Hermes (Hermes Acquisition). BTPS retained a 29.5 percent interest in Hermes and contributed the remaining 10.5 percent interest into an employee benefit trust for the benefit of certain members of Hermes' management and other key employees under a new long-term incentive plan. Federated paid a total of £259.9 million ($343.3 million) which included £246 million for the previously announced cost of the acquisition and an additional £13.9 million primarily for Federated's 60 percent share of Hermes' estimated excess regulatory capital. Federated funded the transaction through a combination of cash and an $18.0 million drawdown from its existing revolving credit facility (see Note (11) for additional information).

Federated has incurred $4.6 million in transaction costs directly attributable to the Hermes Acquisition. Of this amount, $2.8 million has been expensed to date in 2018, primarily recorded in Professional Service Fees on the Consolidated Statements of Income. The transaction costs exclude a derivative loss (see Note (10) for additional information) and a $1.7 million foreign exchange gain recognized in the second quarter of 2018 as a result of holding British pound sterling at quarter end. Federated anticipates future transaction costs of approximately $16 million, of which approximately $11 million may be recorded in the third quarter of 2018. Actual results may differ from these estimates, and such differences may be material to the Consolidated Financial Statements.

Due to the timing of the Hermes Acquisition, the information necessary to complete the preliminary purchase price allocation and pro forma financial results are not yet available. This information will be available in connection with third quarter 2018 reporting.