Market Risk Benefits - Market Risk Benefits In Asset and Liability Positions (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022		Sep. 30, 2022	Dec. 31, 2021	Jan. 01, 2021
Liability for Future Policy Benefit, Activity [Line Items]
MRB assets	$ 2,200	$ 800	[1]	$ 806
MRB liabilities	4,660	5,864	[1]	6,488
Net Liability	2,460			5,682		$ 19,852
Retirement Strategies
Liability for Future Policy Benefit, Activity [Line Items]
Net Liability	2,991	$ 4,987		5,591	$ 13,392
Other Businesses
Liability for Future Policy Benefit, Activity [Line Items]
MRB assets	13			12
MRB liabilities	92			132
Net Liability	79			120
Individual Variable | Retirement Strategies
Liability for Future Policy Benefit, Activity [Line Items]
MRB assets	2,187			794
MRB liabilities	4,568			6,356
Net Liability	$ 2,381			$ 5,562		$ 19,473

[1] Prior period amounts adjusted for the implementation of ASU 2018-12: Targeted Improvements to the Accounting for Long-Duration Contracts.