Reserve for Unpaid Losses and Loss Adjustment Expenses (Tables)

3 Months Ended

Mar. 31, 2024

Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block]

Unfavorable (Favorable) Prior Accident Year Development

	For the three months ended March 31,
	2024		2023
Workers’ compensation	$	(67)	$	(61)
Workers’ compensation discount accretion	12		11
General liability	17		12
Marine	7		1
Package business	—		(5)
Commercial property	(3)		5
Professional liability	(5)		—
Bond	—		—
Assumed reinsurance	9		2
Automobile liability - Commercial Lines	—		—
Automobile liability - Personal Lines	—		—
Homeowners	—		(1)
Net asbestos and environmental ("A&E") reserves	—		—
Catastrophes	—		—
Uncollectible reinsurance	—		8
Other reserve re-estimates, net	(2)		28
Prior accident year development before change in deferred gain	(32)		—
Change in deferred gain on retroactive reinsurance included in other liabilities [1]	(24)		—
Total prior accident year development	$	(56)	$	—

Group Benefits

Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block]

Rollforward of Liabilities for Unpaid Losses and Loss Adjustment Expenses

	For the three months ended March 31,
	2024		2023
Beginning liabilities for unpaid losses and loss adjustment expenses, gross	$	8,274	$	8,160
Reinsurance recoverables	254		245
Beginning liabilities for unpaid losses and loss adjustment expenses, net	8,020		7,915
Provision for unpaid losses and loss adjustment expenses
Current incurral year	1,376		1,325
Prior year's discount accretion	53		53
Prior incurral year development [1]	(189)		(133)
Total provision for unpaid losses and loss adjustment expenses [2]	1,240		1,245
Payments
Current incurral year	(357)		(335)
Prior incurral years	(924)		(889)
Total payments	(1,281)		(1,224)
Ending liabilities for unpaid losses and loss adjustment expenses, net	7,979		7,936
Reinsurance recoverables	255		248
Ending liabilities for unpaid losses and loss adjustment expenses, gross	$	8,234	$	8,184

[1]Prior incurral year development represents the change in estimated ultimate incurred losses and loss adjustment expenses for prior incurral years on a discounted basis.

[2]Includes unallocated loss adjustment expenses ("ULAE") of $45 and $45 for the three months ended March 31, 2024 and 2023, respectively, that are recorded in insurance operating costs and other expenses in the Condensed Consolidated Statements of Operations

Property, Liability and Casualty Insurance Product Line

Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block]

Rollforward of Liabilities for Unpaid Losses and Loss Adjustment Expenses

	For the three months ended March 31,
	2024		2023
Beginning liabilities for unpaid losses and loss adjustment expenses, gross	$	34,044	$	33,083
Reinsurance and other recoverables	6,696		6,465
Beginning liabilities for unpaid losses and loss adjustment expenses, net	27,348		26,618
Provision for unpaid losses and loss adjustment expenses
Current accident year	2,461		2,270
Prior accident year development [1]	(56)		—
Total provision for unpaid losses and loss adjustment expenses	2,405		2,270
Change in deferred gain on retroactive reinsurance included in other liabilities [1]	24		—
Payments
Current accident year	(349)		(321)
Prior accident years	(1,591)		(1,646)
Total payments	(1,940)		(1,967)
Foreign currency adjustment	(5)		8
Ending liabilities for unpaid losses and loss adjustment expenses, net	27,832		26,929
Reinsurance and other recoverables	6,705		6,469
Ending liabilities for unpaid losses and loss adjustment expenses, gross	$	34,537	$	33,398

[1]Prior accident year development for the three months ended March 31, 2024 includes a $24 benefit for amortization of a deferred gain under retroactive reinsurance accounting related to the Navigators Adverse Development Cover ("ADC") as the Company began collection recoveries of the ceded losses from National Indemnity Company ("NICO"), a subsidiary of Berkshire Hathaway Inc, during the period. For additional information regarding the ADC reinsurance agreement, refer to "Change in Deferred Gain on Retroactive Reinsurance" discussion below.