v3.25.2
Deferred Policy Acquisition Costs - Deferred Policy Acquisition Costs and Asset Reconciliation (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
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