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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, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
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 | $ (330) | $ 173 | $ (139) | $ 1,751
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 | (28) | 3 | (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 | 16 | 23 | 34 | 30
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 | (12) | 4 | (15) | 8
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 | (281) | $ 143 | (161) | $ 1,713
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 |  | 3 |
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 | $ (26) |  | $ 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 -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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