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Investments (Fixed Maturity Securities AFS - Narrative) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value of Fixed Maturity Securities AFS | $ 276,780 | $ 340,274
Gross Unrealized Losses | 34,301 | 2,420
Gross Unrealized Gains | 5,239 | 31,901
Nonperforming Financial Instruments [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value of Fixed Maturity Securities AFS | 82 | 22
Gross Unrealized Losses | $ 3 |
Gross Unrealized Gains |  | $ 8

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- Definition Amount, before tax, of unrealized gain 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 (b) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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