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Concentration Risk Concentration Risk (Tables) | 12 Months Ended
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Dec. 31, 2017
Risks and Uncertainties [Abstract] |
Schedules of Revenue Concentration | The following table summarizes the percentage of total revenue earned from Federated's asset classes over the last three years:
|  | 2017 |  |  | 2016 |  |  | 2015 |
Money market assets |  | 41 | % |  | 45 | % |  | 33 | %
Equity assets |  | 42 | % |  | 38 | % |  | 46 | %
Fixed-income assets |  | 17 | % |  | 17 | % |  | 21 | %
Voluntary Fee Waivers | The impact of such fee waivers on various components of Federated's Consolidated Statements of Income was as follows for the years ended December 31:
in millions |  | 2017 |  |  | 2016 |  |  | 2015 |
Revenue |  | $ | (4.4 | ) |  | $ | (87.8 | ) |  | $ | (333.6 | )
Less: Reduction in Distribution expense |  | 3.6 |  |  | 65.8 |  |  | 240.6 |
Operating income |  | (0.8 | ) |  | (22.0 | ) |  | (93.0 | )
Less: Reduction in Noncontrolling interest |  | 0.0 |  |  | 0.0 |  |  | 7.1 |
Pre-tax impact |  | $ | (0.8 | ) |  | $ | (22.0 | ) |  | $ | (85.9 | )

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- Definition Tabular disclosure of the nature of a concentration, a benchmark to which it is compared, and the percentage that the risk is to the benchmark. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13537-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6442-108592 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6327-108592 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6404-108592 + Details
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