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Deferred Policy Acquisition Costs - Deferred Policy Acquisition Costs and Asset Reconciliation (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Movement Analysis of Deferred Policy Acquisition Costs |  |  |  |
Deferred policy acquisition costs asset, beginning of period | $ 1,297 | $ 1,143 | $ 1,242 | $ 1,093
Capitalized deferred policy acquisition costs | 523 | 487 | 1,020 | 904
Amortized deferred policy acquisition costs | (453) | (401) | (895) | (768)
Deferred policy acquisition costs asset, end of period | 1,367 | 1,229 | 1,367 | 1,229
Consolidated Property And Casualty Insurance |  |  |  |
Movement Analysis of Deferred Policy Acquisition Costs |  |  |  |
Deferred policy acquisition costs asset, beginning of period | 937 | 796 | 886 | 749
Capitalized deferred policy acquisition costs | 513 | 475 | 998 | 882
Amortized deferred policy acquisition costs | (445) | (393) | (879) | (753)
Deferred policy acquisition costs asset, end of period | 1,005 | 878 | 1,005 | 878
Life Insurance Segment |  |  |  |
Movement Analysis of Deferred Policy Acquisition Costs |  |  |  |
Deferred policy acquisition costs asset, beginning of period | 360 | 347 | 356 | 344
Capitalized deferred policy acquisition costs | 10 | 12 | 22 | 22
Amortized deferred policy acquisition costs | (8) | (8) | (16) | (15)
Deferred policy acquisition costs asset, end of period | $ 362 | $ 351 | $ 362 | $ 351

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