Adoption of Accounting Pronouncement - Market Risk Benefits by Asset and Liability Positions (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Jan. 01, 2022
Market Risk Benefit [Line Items]
Asset	$ 431		$ 511
Liability	3,021	$ 2,970	2,791
Net liability	(2,590)	(2,855)	(2,280)
Reported
Market Risk Benefit [Line Items]
Asset				$ 366
Liability		0		4,813
Net liability				4,447
Traditional deferred annuities
Market Risk Benefit [Line Items]
Asset	0		0
Liability	167		161
Net liability	(167)	(183)	(161)
Traditional deferred annuities | Reported
Market Risk Benefit [Line Items]
Asset				0
Liability				253
Net liability				253
Indexed annuities
Market Risk Benefit [Line Items]
Asset	431		511
Liability	2,854		2,630
Net liability	$ (2,423)	$ (2,672)	$ (2,119)
Indexed annuities | Reported
Market Risk Benefit [Line Items]
Asset				366
Liability				4,560
Net liability				$ 4,194