Available-for-Sale Securities, at Fair Value, Other than Temporary Impairment, Credit Losses Recognized in Earnings (Details) - USD ($) |
Dec. 31, 2020 |
Dec. 31, 2019 |
|---|---|---|
| Investments, Debt and Equity Securities [Abstract] | ||
| Cumulative other-than-temporary credit losses | $ 0 | $ 17,000,000 |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition The cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (a component of shareholders' equity). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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