Investments - Schedule of Rollforward of Credit Loss Allowance for Fixed Income Securities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Credit Losses on Fixed Income Securities [Roll Forward]
Beginning balance	$ (17)	$ (36)
Ending balance	(10)	(17)	$ (36)
Fixed income securities
Credit Losses on Fixed Income Securities [Roll Forward]
Beginning balance	(17)	(36)	(13)
Credit losses on securities for which credit losses not previously reported	(3)	(8)	(11)
Net (increases) decreases related to credit losses previously reported	(2)	2	(11)
Decrease (increase) related to sales and other	0	3	(1)
Write-offs	12	22	0
Ending balance	(10)	(17)	(36)
Corporate
Credit Losses on Fixed Income Securities [Roll Forward]
Beginning balance	(16)	(35)
Ending balance	(8)	(16)	(35)
ABS
Credit Losses on Fixed Income Securities [Roll Forward]
Beginning balance	(1)	(1)
Ending balance	$ (2)	$ (1)	$ (1)