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Equity (Components of Net Unrealized Appreciation Depreciation of Balances Carried at Fair Value) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Comprehensive Income Net Of Tax [Line Items] |  |  |  |  |
Fixed maturity securities available-for-sale |  | $ (60,749) | $ (56,735) |  |
Other invested assets |  | (3,070) | (2,829) |  |
Deferred policy acquisition costs |  | (3,690) | (3,616) | $ (3,512) | $ (3,398)
Accumulated Other Comprehensive Income Loss Change In Component During Period |  | (2,319) | 2,812 | 3,123 |
Change In Net Unrealized Appreciation Depreciation [Member] |  |  |  |  |
Comprehensive Income Net Of Tax [Line Items] |  |  |  |  |
Fixed maturity securities available-for-sale |  | (2,299) | (2,837) | (3,258) |
Other invested assets | [1] | (64) | (29) | (37) |
Effect On Unrealized Appreciation Depreciation [Member] |  |  |  |  |
Comprehensive Income Net Of Tax [Line Items] |  |  |  |  |
Deferred policy acquisition costs |  | $ (44) | $ (54) | $ (98) |
[1] | Includes cash flow hedges. See Note 5 for additional information on cash flow hedges.

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