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Fair Value Measurements - Significant Unobservable Inputs Freestanding Derivatives (Details) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2020 USD ($) | Dec. 31, 2019 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation |  |
Adjustment Resulting from Broker Prices Received | $ 0 |
Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation |  |
Derivative Assets (Liabilities), at Fair Value, Net | $ 1 |
Equity options |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation |  |
Derivative Assets (Liabilities), at Fair Value, Net |  | $ (15,000,000)
Equity options | Measurement Input, Option Volatility [Member] | Minimum |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation |  |
Derivative Asset (Liability) Net, Measurement Input |  | 0.13
Equity options | Measurement Input, Option Volatility [Member] | Maximum |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation |  |
Derivative Asset (Liability) Net, Measurement Input |  | 0.28
Equity options | Measurement Input, Option Volatility [Member] | Weighted Average [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation |  |
Derivative Asset (Liability) Net, Measurement Input |  | 0.17

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- Definition Value of input used to measure net derivative asset (liability). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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