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Deferred Policy Acquisition Costs - Deferred Policy Acquisition Costs and Asset Reconciliation (Detail) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Movement Analysis of Deferred Policy Acquisition Costs |  |
Deferred policy acquisition costs asset, beginning of period | $ 1,242 | $ 1,093
Capitalized deferred policy acquisition costs | 497 | 417
Amortized deferred policy acquisition costs | (442) | (367)
Deferred policy acquisition costs asset, end of period | 1,297 | 1,143
Consolidated Property And Casualty Insurance |  |
Movement Analysis of Deferred Policy Acquisition Costs |  |
Deferred policy acquisition costs asset, beginning of period | 886 | 749
Capitalized deferred policy acquisition costs | 485 | 407
Amortized deferred policy acquisition costs | (434) | (360)
Deferred policy acquisition costs asset, end of period | 937 | 796
Life Insurance Segment |  |
Movement Analysis of Deferred Policy Acquisition Costs |  |
Deferred policy acquisition costs asset, beginning of period | 356 | 344
Capitalized deferred policy acquisition costs | 12 | 10
Amortized deferred policy acquisition costs | (8) | (7)
Deferred policy acquisition costs asset, end of period | $ 360 | $ 347

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