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Business and Summary of Significant Accounting Policies - Schedule of Changes in Other Comprehensive Earnings (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Stockholders' equity attributable to parent, beginning balance |  | $ 6,116 |  |
Reclassification adjustments |  | 126 | $ 173 | $ (101)
Other comprehensive earnings |  | 759 | (3,956) | (352)
Non-controlling interest | [1] | (134) | 35 | 0
Stockholders' equity attributable to parent, ending balance |  | 6,908 | 6,116 |
Unrealized gain (loss) on investments and other financial instruments, net (excluding investments in unconsolidated affiliates) |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Stockholders' equity attributable to parent, beginning balance |  | (3,771) | 1,017 | 1,625
Reclassification adjustments |  | 195 | (38) | (109)
Other comprehensive earnings |  | 961 | (4,783) | (499)
Non-controlling interest |  | (178) | 33 |
Stockholders' equity attributable to parent, ending balance |  | (2,793) | (3,771) | 1,017
Change in current discount rate - future policy benefits |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Stockholders' equity attributable to parent, beginning balance |  | 966 | (2) | (159)
Reclassification adjustments |  | (51) | 204 | 33
Other comprehensive earnings |  | (189) | 764 | 124
Non-controlling interest |  | 38 | 0 |
Stockholders' equity attributable to parent, ending balance |  | 764 | 966 | (2)
Change in instrument-specific credit risk - market risk benefits |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Stockholders' equity attributable to parent, beginning balance |  | (62) | (146) | (159)
Reclassification adjustments |  | (7) | 16 | 3
Other comprehensive earnings |  | (34) | 67 | 10
Non-controlling interest |  | 7 | 1 |
Stockholders' equity attributable to parent, ending balance |  | (96) | (62) | (146)
Other |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Stockholders' equity attributable to parent, beginning balance |  | (3) | 9 | 24
Reclassification adjustments |  | (11) | (9) | (28)
Other comprehensive earnings |  | 21 | (4) | 13
Non-controlling interest |  | (1) | 1 |
Stockholders' equity attributable to parent, ending balance |  | 6 | (3) | 9
Total Accumulated Other Comprehensive Earnings (Loss) |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Stockholders' equity attributable to parent, beginning balance |  | (2,870) | 878 | 1,331
Stockholders' equity attributable to parent, ending balance |  | $ (2,119) | $ (2,870) | $ 878
[1] | Net of income tax (benefit) expense of $(35) million and $9 million for the years ended December 31, 2023, and 2022, respectively.

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