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Income Taxes - Significant components of deferred tax assets and liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Deferred tax assets: |  |
Federal net operating loss carryforwards | $ 2 | $ 2
Foreign underwriting losses | 10 | 10
Insurance claims and reserves | 283 | 269
Employee benefits | 114 | 111
Deferred Tax Assets, Lease Liabilities | 45 | 38
Other, net | 20 | 23
Total deferred tax assets before valuation allowance | 474 | 453
Valuation allowance against deferred tax assets | (11) | (14)
Total deferred tax assets | 463 | 439
Deferred tax liabilities: |  |
Investment securities | (233) | (177)
Deferred policy acquisition costs | (73) | (70)
Insurance claims and reserves transition liability | (4) | (8)
Deferred Tax Liabilities, Leasing Arrangements | 42 | 36
Real estate, property and equipment | (7) | (12)
Total deferred tax liabilities | (359) | (303)
Net deferred tax asset | $ 104 | $ 136

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- Definition Amount of reasonable estimate of deferred tax liability related to the transition to revised interest rates and payout factors used in discounting loss reserves as modified by the TCJA. + References No definition available. + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-6 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-6 + Details
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