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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, 2021 | Dec. 31, 2020 | Dec. 31, 2019
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 | $ 3,480 | $ 1,841 | $ 1,086
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 | 4 |  |
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 | 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 | 12 |  |
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 | 2,326 | 671 | 1,015
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 | 1,051 | 536 | 168
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 | $ 44 | $ 634 | $ (97)

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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 http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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