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Reinsurance (Tables)

12 Months Ended

Dec. 31, 2024

Insurance [Abstract]

Reinsurance Recoverable, Credit Quality Indicator

Reinsurance Recoverables by Credit Quality Indicator
			As of December 31, 2024															As of December 31, 2023
			P&C			Employee Benefits			Corporate			Total						P&C			Employee Benefits			Corporate			Total
AM Best Financial Strength Rating
A++			$	2,271		$	—		$	—		$	2,271					$	2,398		$	—		$	—		$	2,398
A+			2,169			281			224			2,674						2,030			251			241			2,522
A			829			1			—			830						810			1			—			811
A-			622			4			—			626						653			5			—			658
B++			2			—			2			4						2			—			3			5
Below B++			22			—			—			22						22			—			—			22
Total Rated by AM Best			5,915			286			226			6,427						5,915			257			244			6,416
Mandatory (Assigned) and Voluntary Risk Pools			205			—			—			205						208			—			—			208
Captives			402			—			—			402						353			—			—			353
Other not rated companies			176			5			—			181						226			4			—			230
Gross Reinsurance Recoverables			6,698			291			226			7,215						6,702			261			244			7,207
Allowance for uncollectible reinsurance			(72)			(1)			(2)			(75)						(100)			(1)			(2)			(103)
Net Reinsurance Recoverables			$	6,626		$	290		$	224		$	7,140					$	6,602		$	260		$	242		$	7,104

Reinsurance Recoverable, Allowance for Credit Loss

Allowance for Uncollectible Reinsurance
			As of December 31, 2024						As of December 31, 2023						As of December 31, 2022
P&C beginning allowance for uncollectible reinsurance			$	100					$	102					$	96
Beginning allowance for disputed amounts			57						60						54
P&C beginning ACL			43						42						42
Current period provision			(6)						3						—
Current period gross write-offs			(13)						(2)						—
P&C ending ACL			24						43						42
Ending allowance for disputed amounts			48						57						60
P&C ending allowance for uncollectible reinsurance			72						100						102
Employee Benefits allowance for uncollectible reinsurance			1						1						1
Corporate allowance for uncollectible reinsurance			2						2						2
Total allowance for uncollectible reinsurance			$	75					$	103					$	105

Property and Casualty Insurance and Group Benefits Revenue

Insurance Revenues

Property and Casualty Insurance Revenue

			For the years ended December 31,
Premiums Written			2024			2023			2022
Direct			$	17,622		$	16,144		$	14,891
Assumed			1,102			975			718
Ceded			(1,775)			(1,642)			(1,490)
Net			$	16,949		$	15,477		$	14,119
Premiums Earned
Direct			$	16,915		$	15,514		$	14,328
Assumed			1,001			826			654
Ceded			(1,742)			(1,612)			(1,462)
Net			$	16,174		$	14,728		$	13,520

Employee Benefits Revenue

			For the years ended December 31,
			2024			2023			2022
Gross earned premiums, fees and other considerations			$	6,576		$	6,445		$	5,988
Reinsurance assumed			166			174			175
Reinsurance ceded			(127)			(104)			(106)
Net earned premiums, fees and other considerations			$	6,615		$	6,515		$	6,057

X

- Definition

Tabular disclosure of the effects of reinsurance, for example, but not limited to, disclosure of direct, assumed, and ceded insurance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-SubTopic 605
-Topic 944
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479032/944-605-50-1

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- References

No definition available.

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X

- Definition

Tabular disclosure of allowance for credit loss on reinsurance recoverable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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X

- Definition

Tabular disclosure of credit quality indicator for reinsurance recoverable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-5

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