Derivative Instruments and Hedging Activities Schedule of Total Return Swaps (Details) - USD ($) |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|---|
| Derivative [Line Items] | |||
| Notional | $ 23,932,603,000 | $ 48,445,497,000 | $ 36,528,169,000 |
| Markit IOS Total Return Swap [Member] | |||
| Derivative [Line Items] | |||
| Notional | 41,890,000 | ||
| Fair Value | (29,000) | ||
| Cost Basis | (59,000) | ||
| Derivative, Unrealized Gains (Losses) | 30,000 | ||
| Markit IOS Total Return Swap [Member] | Maturity Date, 1/12/2043 [Member] | |||
| Derivative [Line Items] | |||
| Notional | 18,625,000 | ||
| Fair Value | 5,000 | ||
| Cost Basis | (30,000) | ||
| Derivative, Unrealized Gains (Losses) | 35,000 | ||
| Markit IOS Total Return Swap [Member] | Maturity Date, 1/12/2044 [Member] | |||
| Derivative [Line Items] | |||
| Notional | 23,265,000 | ||
| Fair Value | (34,000) | ||
| Cost Basis | (29,000) | ||
| Derivative, Unrealized Gains (Losses) | $ (5,000) |
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- Definition Cost (or upfront payable/receivable) as of the balance sheet date of the derivative or group of derivatives. No definition available.
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- Definition The aggregate net gain (loss) from increase (decrease) in fair value of derivatives. No definition available.
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- Definition Fair value of the assets less the liabilities of a derivative or group of derivatives. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Nominal or face amount used to calculate payment on derivative. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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