Commitments and Contingencies Unrecorded Unconditional Purchase Obligations Disclosure (Details) $ in Millions	Dec. 31, 2017 USD ($)
Unrecorded Unconditional Purchase Obligation [Line Items]
2018	$ 25.7
2019	10.4
2020	4.8
Total	40.9
Purchase Obligations [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
2018	12.6	[1]
2019	5.5	[1]
2020	2.4	[1]
Total	20.5	[1]
Employment-related Commitments [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
2018	10.7	[2]
2019	3.9	[2]
2020	2.3	[2]
Total	16.9	[2]
Other Obligations [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
2018	2.4
2019	1.0
2020	0.1
Total	$ 3.5

[1] Federated is a party to various contracts pursuant to which it receives certain services, including services for marketing and information technology, access to various fund-related information systems and research databases, trade order transmission and recovery services as well as other services. These contracts contain certain minimum noncancelable payments, cancellation provisions and renewal terms. The contracts require payments through the year 2020. Costs for such services are expensed as incurred.

[2] Federated has certain domestic and international employment arrangements pursuant to which Federated is obligated to make minimum compensation payments.