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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 | 3 Months Ended | 6 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
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 | $ 1,929 | $ (541) | $ 1,128 | $ 881
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 | (5) | (28) | 1 | (58)
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 | (13) | 16 | (29) | 34
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 | (5) | (12) | (3) | (15)
Derivative Investments [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 |  | 1 | (2) | 3
GLB 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 | 2,007 | (492) | 1,369 | 859
Indexed Annuity And IUL Contracts [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 | $ (55) | $ (26) | $ (208) | $ 58

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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 -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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