Other Insurance Liabilities and Separate Accounts - Roll Forward of Separate Account Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Separate Account, Liability [Roll Forward]
Separate Accounts liability, beginning of the period	$ 3,311	$ 3,250
Premiums and deposits	888	964
Surrenders and withdrawals	(1,336)	(277)
Benefit payments	(953)	(978)
Investment earnings	84	348
Net transfers from general account	8	13
Other	(8)	(9)
Separate Accounts liability, end of the period	1,994	3,311
Cash surrender value, end of the period	$ 933	$ 1,987