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Investments (Fair Value Below Amortized Cost of Gross Unrealized Losses for Fixed Maturity Securities) (Details) - USD ($) $ in Millions | 9 Months Ended |
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Sep. 30, 2022 | Dec. 31, 2021
Gross unrealized losses with number of securities [Line Items] |  |
Document Period End Date | Sep. 30, 2022 |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | $ 7,795 | $ 349

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- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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