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Business Dispositions - Additional Information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Net realized gains (losses) | Net realized gains (losses)
Income tax expense | $ 443 | $ 531 | $ 383
Continental Europe Operations [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Disposal Group, Including Discontinued Operation, Consideration |  | 11 | 14
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal |  | 21 | 48
HIG:DisposalGroupNotDiscontinuedOperationGainLossOnDisposalAfterTax |  | 16 | 30
Business Combination, Contingent Consideration, Liability | $ 0 |  |
Gain (Loss) on Investments [Member] | Continental Europe Operations [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Income tax expense |  | $ 5 | $ 18

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