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Derivative Financial Instruments - Derivatives Not Designated as Hedging Instruments (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Effect of derivatives not designated as hedging instruments on the consolidated statements of operations |  |
Amount of gain (loss) recognized in net income on derivatives | $ 263.2 | $ 2.9
Interest rate contracts |  |
Effect of derivatives not designated as hedging instruments on the consolidated statements of operations |  |
Amount of gain (loss) recognized in net income on derivatives | 500.4 | 67.3
Foreign exchange contracts |  |
Effect of derivatives not designated as hedging instruments on the consolidated statements of operations |  |
Amount of gain (loss) recognized in net income on derivatives | (56.9) | 4.6
Equity contracts |  |
Effect of derivatives not designated as hedging instruments on the consolidated statements of operations |  |
Amount of gain (loss) recognized in net income on derivatives | 177.1 | (75.0)
Credit contracts |  |
Effect of derivatives not designated as hedging instruments on the consolidated statements of operations |  |
Amount of gain (loss) recognized in net income on derivatives | 2.4 | 1.3
Other contracts |  |
Effect of derivatives not designated as hedging instruments on the consolidated statements of operations |  |
Amount of gain (loss) recognized in net income on derivatives | $ (359.8) | $ 4.7

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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4CC -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL109998890-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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