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Consolidation - Narrative (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Variable Interest Entity [Line Items] |  |  |
Accounts receivable from Federated Funds | $ 37,600,000 | $ 35,000,000.0 |
Fee Waivers | 427,300,000 | 358,200,000 | $ 345,500,000
Investments, deconsolidation | 6,200,000 |  |
Non-Consolidated Variable Interest Entity, Not Primary Beneficiary |  |  |
Variable Interest Entity [Line Items] |  |  |
AUM for nonconsolidated Federated Funds | 9,600,000,000 |  |
Non-Consolidated Variable Interest Entity, Not Primary Beneficiary | Cash and Cash Equivalents |  |  |
Variable Interest Entity [Line Items] |  |  |
Federated's maximum risk of loss in non-consolidated investment companies | 111,900,000 |  |
Non-Consolidated Variable Interest Entity, Not Primary Beneficiary | Accounts Receivable |  |  |
Variable Interest Entity [Line Items] |  |  |
Federated's maximum risk of loss in non-consolidated investment companies | 15,400,000 | 16,200,000 |
Financial Support, Fee Waivers |  |  |
Variable Interest Entity [Line Items] |  |  |
Money market funds which meet the scope exception of the consolidation guidance | 311,600,000 | 242,900,000 | 222,100,000
Financial Support, Capital Contributions |  |  |
Variable Interest Entity [Line Items] |  |  |
Money market funds which meet the scope exception of the consolidation guidance | $ 0 | $ 0 | $ 0

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