Derivatives	9 Months Ended
Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	Derivatives On April 13, 2018, Federated entered into a foreign currency forward derivative financial instrument with Citi Bank, N.A. (Citi) under an existing International Swaps and Derivatives Association, Inc. Master Agreement dated June 9, 2010 (ISDA) in order to hedge against foreign exchange rate fluctuations associated with the payment for the Hermes Acquisition. This forward was not designated as a hedging instrument for accounting purposes. Under this forward transaction, Federated committed to purchase £250 million at an all-in forward rate of 1.43192 (which is comprised of a spot rate of 1.42522 plus forward points of 0.00670) for settlement on August 1, 2018. On June 27, 2018, Federated entered into a second foreign currency forward transaction with Citi in which Federated committed to sell £250 million at an all-in forward rate of 1.31601 (which is comprised of a spot rate of 1.31400 plus forward points of 0.00201) for settlement on August 1, 2018. This forward was not designated as a hedging instrument for accounting purposes. This second forward allowed Federated to effectively close the initial forward to lock in the foreign exchange rate and amount due on August 1, 2018. The change in the spot rate and a reduction in the forward points resulted in a payment of $29.0 million to Citi on August 1, 2018 when both derivatives were settled. The $29.0 million change in fair value of these derivatives was recorded as a nonoperating expense in Other, net on the Consolidated Statements of Income during the three-month period ended June 30, 2018.

Derivatives

On April 13, 2018, Federated entered into a foreign currency forward derivative financial instrument with Citi Bank, N.A. (Citi) under an existing International Swaps and Derivatives Association, Inc. Master Agreement dated June 9, 2010 (ISDA) in order to hedge against foreign exchange rate fluctuations associated with the payment for the Hermes Acquisition. This forward was not designated as a hedging instrument for accounting purposes. Under this forward transaction, Federated committed to purchase £250 million at an all-in forward rate of 1.43192 (which is comprised of a spot rate of 1.42522 plus forward points of 0.00670) for settlement on August 1, 2018.

On June 27, 2018, Federated entered into a second foreign currency forward transaction with Citi in which Federated committed to sell £250 million at an all-in forward rate of 1.31601 (which is comprised of a spot rate of 1.31400 plus forward points of 0.00201) for settlement on August 1, 2018. This forward was not designated as a hedging instrument for accounting purposes. This second forward allowed Federated to effectively close the initial forward to lock in the foreign exchange rate and amount due on August 1, 2018. The change in the spot rate and a reduction in the forward points resulted in a payment of $29.0 million to Citi on August 1, 2018 when both derivatives were settled. The $29.0 million change in fair value of these derivatives was recorded as a nonoperating expense in Other, net on the Consolidated Statements of Income during the three-month period ended June 30, 2018.