Reinsurance (Tables)

3 Months Ended

Mar. 31, 2021

Reinsurance Recoverable, Credit Quality Indicator [Table Text Block]


Reinsurance Recoverables by Credit Quality Indicator
	As of March 31, 2021								As of December 31, 2020
	Property and Casualty		Group Benefits		Corporate		Total		Property and Casualty		Group Benefits		Corporate		Total
A.M. Best Financial Strength Rating
A++	$	1,627	$	—	$	—	$	1,627	$	1,598	$	—	$	—	$	1,598
A+	1,823		240		306		2,369		1,788		230		305		2,323
A	565		—		—		565		638		—		—		638
A-	36		9		—		45		37		9		—		46
B++	658		—		3		661		666		—		3		669
Below B++	21		1		—		22		21		1		—		22
Total Rated by A.M. Best	4,730		250		309		5,289		4,748		240		308		5,296
Mandatory (Assigned) and Voluntary Risk Pools	259		—		—		259		259		—		—		259
Captives	308		—		—		308		305		—		—		305
Other not rated companies	318		7		—		325		254		5		—		259
Gross Reinsurance Recoverables	5,615		257		309		6,181		5,566		245		308		6,119
Allowance for uncollectible reinsurance	(95)		(1)		(2)		(98)		(105)		(1)		(2)		(108)
Net Reinsurance Recoverables	$	5,520	$	256	$	307	$	6,083	$	5,461	$	244	$	306	$	6,011

Reinsurance Recoverable, Allowance for Credit Loss [Table Text Block]


Allowance for Uncollectible Reinsurance
	Three Months Ended March 31, 2021								Three Months Ended March 31, 2020
	Property and Casualty		Group Benefits		Corporate		Total		Property and Casualty		Group Benefits		Corporate		Total
Beginning allowance for uncollectible reinsurance	$	105	$	1	$	2	$	108	$	114	$	—	$	—	$	114
Beginning allowance for disputed amounts	53		—		—		53		66		—		—		$	66
Beginning ACL	52		1		2		55		48		—		—		48
Cumulative effect of accounting change [1]									—		1		1		2
Adjusted beginning ACL	52		1		2		55		48		1		1		50
Current period provision (release)	(13)		—		—		(13)		1		—		1		2



Ending ACL	39		1		2		42		49		1		2		52
Ending allowance for disputed amounts	56		—		—		56		65		—		—		65
Ending allowance for uncollectible reinsurance	$	95	$	1	$	2	$	98	$	114	$	1	$	2	$	117

[1] Represents the adjustment to the ACL recorded on adoption of accounting guidance for credit losses on January 1, 2020. For further information, see Note 1 - Basis of Presentation and Significant Accounting Policies of Notes to Consolidated Financial Statements included in the Company's 2020 Form 10-K Annual Report.