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Reinsurance (Tables)
 12 Months Ended
Dec. 31, 2024
Reinsurance Disclosures [Abstract]  
Property Casualty Insurance Assumed And Ceded Business
The table below summarizes our consolidated property casualty insurance net written premiums, earned premiums and incurred loss and loss expenses:
(Dollars in millions)Years ended December 31,
202420232022
Direct written premiums$8,994 $7,784 $7,002 
Assumed written premiums676 597 619 
Ceded written premiums(427)(335)(314)
Net written premiums$9,243 $8,046 $7,307 
Direct earned premiums$8,338 $7,407 $6,677 
Assumed earned premiums642 569 561 
Ceded earned premiums(412)(331)(314)
Earned premiums$8,568 $7,645 $6,924 
Direct incurred loss and loss expenses$5,106 $4,843 $4,495 
Assumed incurred loss and loss expenses355 280 396 
Ceded incurred loss and loss expenses(25)(165)(175)
Incurred loss and loss expenses$5,436 $4,958 $4,716 
Life Insurance Assumed And Ceded Business
The table below summarizes our consolidated life insurance earned premiums and contract holders' benefits incurred:
(Dollars in millions)Years ended December 31,
202420232022
Direct earned premiums$404 $394 $379 
Ceded earned premiums(83)(81)(78)
Earned premiums$321 $313 $301 
Direct contract holders' benefits incurred$358 $391 $394 
Ceded contract holders' benefits incurred(57)(75)(91)
Contract holders' benefits incurred$301 $316 $303