Investments - Accrued Interest Receivable on Fixed Maturities, AFS and Mortgage Loans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule of Investments [Line Items]
Proceeds from Sale of Debt Securities, Available-for-sale	$ 6,806	$ 14,996	$ 22,457
Fixed maturities
Schedule of Investments [Line Items]
Proceeds from Sale of Debt Securities, Available-for-sale	3,800	11,400	$ 15,900
Fixed maturities
Schedule of Investments [Line Items]
Interest Receivable	371	338
Mortgage loans
Schedule of Investments [Line Items]
Interest Receivable	20	$ 18
Transfer to Investments	$ 80