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Fair Value of Financial Instruments (Changes In Unrealized Gains (Losses) Within Level 3 Financial Instruments Carried At Fair Value And Still Held) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Changes in unrealized gains (losses) within Level 3 financial instruments carried at fair value and still held |  |  |
Change in unrealized gains (losses) included in net income | $ 3,045 | $ 4,883 | $ 1,841
Trading securities [Member] |  |  |
Changes in unrealized gains (losses) within Level 3 financial instruments carried at fair value and still held |  |  |
Change in unrealized gains (losses) included in net income | (81) | 4 |
Available-for-sale equity securities [Member] |  |  |
Changes in unrealized gains (losses) within Level 3 financial instruments carried at fair value and still held |  |  |
Change in unrealized gains (losses) included in net income | 56 | 43 |
Mortgage Loans On Real Estate [Member] |  |  |
Changes in unrealized gains (losses) within Level 3 financial instruments carried at fair value and still held |  |  |
Change in unrealized gains (losses) included in net income | (20) | 12 |
Derivative investments |  |  |
Changes in unrealized gains (losses) within Level 3 financial instruments carried at fair value and still held |  |  |
Change in unrealized gains (losses) included in net income | 2 | 1,051 | 536
GLB embedded derivative reserves |  |  |
Changes in unrealized gains (losses) within Level 3 financial instruments carried at fair value and still held |  |  |
Change in unrealized gains (losses) included in net income |  |  | 671
MRBs [Member] |  |  |
Changes in unrealized gains (losses) within Level 3 financial instruments carried at fair value and still held |  |  |
Change in unrealized gains (losses) included in net income | 3,183 | 3,729 |
Indexed Annuity Contracts Embedded Derivatives [Member] |  |  |
Changes in unrealized gains (losses) within Level 3 financial instruments carried at fair value and still held |  |  |
Change in unrealized gains (losses) included in net income | $ (95) | $ 44 | $ 634

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- Definition Amount of unrealized gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3) and still held. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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