Reinsurance (Tables)

12 Months Ended

Dec. 31, 2022

Reinsurance Disclosures [Abstract]

Summary of reinsurance financial data [Table Text Block]

The following is a summary of reinsurance financial data reflected in the consolidated statement of income:

(for the year ended December 31, in millions)	2022			2021			2020
Written premiums
Direct	$	36,648		$	33,180		$	30,762
Assumed	1,228			1,064			1,001
Ceded	(2,462)			(2,285)			(2,031)
Total net written premiums	$	35,414		$	31,959		$	29,732
Earned premiums
Direct	$	34,948		$	31,977		$	29,978
Assumed	1,145			1,032			1,010
Ceded	(2,330)			(2,154)			(1,944)
Total net earned premiums	$	33,763		$	30,855		$	29,044
Percentage of assumed earned premiums to net earned premiums	3.4		%	3.3		%	3.5		%
Ceded claims and claim adjustment expenses incurred	$	1,187		$	1,184		$	1,030

Reinsurance recoverables [Table Text Block]

Reinsurance recoverables include amounts recoverable on both paid and unpaid claims and claim adjustment expenses and were as follows:

(at December 31, in millions)	2022		2021
Gross reinsurance recoverables on paid and unpaid claims and claim adjustment expenses	$	3,792	$	3,931
Gross structured settlements	2,802		2,900
Mandatory pools and associations	1,601		1,762
Gross reinsurance recoverables	8,195		8,593
Allowance for estimated uncollectible reinsurance	(132)		(141)
Net reinsurance recoverables	$	8,063	$	8,452