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Investments - Additional Information (Details) - USD ($) | Mar. 31, 2020 | Dec. 31, 2019
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Debt Securities [Member] |  |
Schedule of Investments [Line Items] |  |
Interest Receivable | $ 343,000,000 | $ 334,000,000
Mortgages [Member] |  |
Schedule of Investments [Line Items] |  |
Interest Receivable | $ 14,000,000 | $ 14,000,000

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- Definition Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.8) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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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. + References No definition available. + Details
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- Details
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- Details
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