Investments (Loan Valuation Allowance for Mortgage Loans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Allowance for Loan and Lease Losses [Roll Forward]
Balance beginning	$ 67	$ 51	$ 35
Provision	38	29	16
Allowance for Loan and Lease Losses, Writeoff	(12)	(13)	0
Balance ending	$ 93	$ 67	$ 51