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Investments (Fixed Maturities Securities Excluding Investments Classified as Trading) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Fixed Maturities, available-for-sale, Amortized Cost |  | $ 334,598 | $ 335,447
Gross Unrealized Gains |  | 9,777 | 8,449
Gross Unrealized Losses |  | 27,894 | 36,039
Fixed Maturities, AFS, allowance for credit losses |  | 160 | 138
Fixed Maturities, available-for-sale, at fair value | [1] | 316,321 | 307,719
Amortized Cost |  | 0 | 1,298
Gross Unrealized Gains |  | 0 | 157
Gross Unrealized Losses |  | 0 | 0
Fixed Maturities, Held-to-maturity, Fair Value |  | 0 | 1,455
Fixed Maturities, HTM, allowance for credit losses |  | 0 | 2
Amortized Cost, Net of Allowance | [1] | 0 | 1,296
U.S. Treasury securities and obligations of U.S. government authorities and agencies |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Fixed Maturities, available-for-sale, Amortized Cost |  | 24,874 | 29,372
Gross Unrealized Gains |  | 1,091 | 1,110
Gross Unrealized Losses |  | 4,169 | 4,413
Fixed Maturities, AFS, allowance for credit losses |  | 0 | 0
Fixed Maturities, available-for-sale, at fair value |  | 21,796 | 26,069
Obligations of U.S. states and their political subdivisions |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Fixed Maturities, available-for-sale, Amortized Cost |  | 8,650 | 10,179
Gross Unrealized Gains |  | 267 | 238
Gross Unrealized Losses |  | 459 | 728
Fixed Maturities, AFS, allowance for credit losses |  | 0 | 0
Fixed Maturities, available-for-sale, at fair value |  | 8,458 | 9,689
Foreign government bonds |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Fixed Maturities, available-for-sale, Amortized Cost |  | 71,556 | 74,103
Gross Unrealized Gains |  | 3,895 | 4,503
Gross Unrealized Losses |  | 5,208 | 5,379
Fixed Maturities, AFS, allowance for credit losses |  | 53 | 1
Fixed Maturities, available-for-sale, at fair value |  | 70,190 | 73,226
Amortized Cost |  | 0 | 725
Gross Unrealized Gains |  | 0 | 128
Gross Unrealized Losses |  | 0 | 0
Fixed Maturities, Held-to-maturity, Fair Value |  | 0 | 853
Fixed Maturities, HTM, allowance for credit losses |  | 0 | 0
Amortized Cost, Net of Allowance |  | 0 | 725
U.S. public corporate securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Fixed Maturities, available-for-sale, Amortized Cost |  | 105,593 | 99,854
Gross Unrealized Gains |  | 2,357 | 1,311
Gross Unrealized Losses |  | 9,711 | 13,563
Fixed Maturities, AFS, allowance for credit losses |  | 67 | 16
Fixed Maturities, available-for-sale, at fair value |  | 98,172 | 87,586
U.S. private corporate securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Fixed Maturities, available-for-sale, Amortized Cost |  | 42,801 | 39,867
Gross Unrealized Gains |  | 807 | 507
Gross Unrealized Losses |  | 2,574 | 3,438
Fixed Maturities, AFS, allowance for credit losses |  | 14 | 57
Fixed Maturities, available-for-sale, at fair value |  | 41,020 | 36,879
Foreign public corporate securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Fixed Maturities, available-for-sale, Amortized Cost |  | 20,473 | 22,235
Gross Unrealized Gains |  | 487 | 416
Gross Unrealized Losses |  | 1,298 | 1,945
Fixed Maturities, AFS, allowance for credit losses |  | 19 | 19
Fixed Maturities, available-for-sale, at fair value |  | 19,643 | 20,687
Amortized Cost |  | 0 | 430
Gross Unrealized Gains |  | 0 | 24
Gross Unrealized Losses |  | 0 | 0
Fixed Maturities, Held-to-maturity, Fair Value |  | 0 | 454
Fixed Maturities, HTM, allowance for credit losses |  | 0 | 2
Amortized Cost, Net of Allowance |  | 0 | 428
Foreign private corporate securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Fixed Maturities, available-for-sale, Amortized Cost |  | 35,128 | 32,755
Gross Unrealized Gains |  | 613 | 150
Gross Unrealized Losses |  | 3,446 | 5,201
Fixed Maturities, AFS, allowance for credit losses |  | 5 | 44
Fixed Maturities, available-for-sale, at fair value |  | 32,290 | 27,660
Asset-backed securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Fixed Maturities, available-for-sale, Amortized Cost |  | 12,514 | 12,972
Gross Unrealized Gains |  | 202 | 166
Gross Unrealized Losses |  | 119 | 286
Fixed Maturities, AFS, allowance for credit losses |  | 2 | 1
Fixed Maturities, available-for-sale, at fair value |  | 12,595 | 12,851
Commercial mortgage-backed securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Fixed Maturities, available-for-sale, Amortized Cost |  | 10,571 | 11,497
Gross Unrealized Gains |  | 34 | 19
Gross Unrealized Losses |  | 713 | 861
Fixed Maturities, AFS, allowance for credit losses |  | 0 | 0
Fixed Maturities, available-for-sale, at fair value |  | 9,892 | 10,655
Residential mortgage-backed securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Fixed Maturities, available-for-sale, Amortized Cost |  | 2,438 | 2,613
Gross Unrealized Gains |  | 24 | 29
Gross Unrealized Losses |  | 197 | 225
Fixed Maturities, AFS, allowance for credit losses |  | 0 | 0
Fixed Maturities, available-for-sale, at fair value |  | 2,265 | 2,417
Amortized Cost |  | 0 | 143
Gross Unrealized Gains |  | 0 | 5
Gross Unrealized Losses |  | 0 | 0
Fixed Maturities, Held-to-maturity, Fair Value |  | 0 | 148
Fixed Maturities, HTM, allowance for credit losses |  | 0 | 0
Amortized Cost, Net of Allowance |  | 0 | 143
Prudential Netting Agreement | U.S. private corporate securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Fixed Maturities, available-for-sale, Amortized Cost |  | 12,370 | 8,040
Fixed Maturities, available-for-sale, at fair value |  | 12,370 | 8,040
Prudential Netting Agreement | Fixed Maturities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Amortized Cost |  |  | 4,250
Fixed Maturities, Held-to-maturity, Fair Value |  |  | 4,250
Prudential Netting Agreement | Fixed Maturities | U.S. private corporate securities |  |  |
Summary Of Investments Other Than Investments In Related Parties Reportable Data [Line Items] |  |  |
Fixed Maturities, available-for-sale, Amortized Cost |  | 12,370 | 8,040
Fixed Maturities, available-for-sale, at fair value |  | $ 12,370 | $ 8,040
[1] | See Note 4 for details of balances associated with variable interest entities.

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