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Reinsurance (Tables)
 12 Months Ended
Dec. 31, 2022
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,
202220212020
Direct written premiums$7,002 $6,229 $5,756 
Assumed written premiums619 515 335 
Ceded written premiums(314)(265)(227)
Net written premiums$7,307 $6,479 $5,864 
Direct earned premiums$6,677 $5,996 $5,623 
Assumed earned premiums561 443 285 
Ceded earned premiums(314)(255)(217)
Earned premiums$6,924 $6,184 $5,691 
Direct incurred loss and loss expenses$4,495 $3,352 $3,699 
Assumed incurred loss and loss expenses396 366 184 
Ceded incurred loss and loss expenses(175)(122)(46)
Incurred loss and loss expenses$4,716 $3,596 $3,837 
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,
202220212020
Direct earned premiums$373 $374 $362 
Ceded earned premiums(78)(76)(73)
Earned premiums$295 $298 $289 
Direct contract holders' benefits incurred$386 $423 $359 
Ceded contract holders' benefits incurred(90)(83)(62)
Contract holders' benefits incurred$296 $340 $297