Reinsurance (Tables)

12 Months Ended

Dec. 31, 2021

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)	2021			2020			2019
Written premiums
Direct	$	33,180		$	30,762		$	30,022
Assumed	1,064			1,001			1,041
Ceded	(2,285)			(2,031)			(1,912)
Total net written premiums	$	31,959		$	29,732		$	29,151
Earned premiums
Direct	$	31,977		$	29,978		$	28,994
Assumed	1,032			1,010			1,076
Ceded	(2,154)			(1,944)			(1,798)
Total net earned premiums	$	30,855		$	29,044		$	28,272
Percentage of assumed earned premiums to net earned premiums	3.3		%	3.5		%	3.8		%
Ceded claims and claim adjustment expenses incurred	$	1,184		$	1,030		$	1,089

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)	2021		2020
Gross reinsurance recoverables on paid and unpaid claims and claim adjustment expenses	$	3,931	$	3,731
Gross structured settlements	2,900		2,964
Mandatory pools and associations	1,762		1,801
Gross reinsurance recoverables	8,593		8,496
Allowance for estimated uncollectible reinsurance	(141)		(146)
Net reinsurance recoverables	$	8,452	$	8,350