Adoption of ASU 2018-12 - Cumulative Effect Adjustments to Components of Stockholders' Equity (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total	$ 6,893	$ 5,102	$ 19,915
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total	4,778	5,924	5,196	$ 8,686
Accumulated Other Comprehensive Income (Loss)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total	$ (3,476)	$ (6,352)	$ 9,984	8,931
Cumulative Effect to Retained Earnings | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total				(6,273)
Cumulative Effect to Retained Earnings | Accumulated Other Comprehensive Income (Loss)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total				4,627
Accounting Standards Update 2018-12 | Cumulative Effect to Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
DAC, VOBA, DSI and DFEL				2,271
Additional liabilities for other insurance benefits				1,197
LFPB and other				(1,902)
MRBs				(3,212)
Total				(1,646)
Accounting Standards Update 2018-12 | Cumulative Effect to Retained Earnings | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
DAC, VOBA, DSI and DFEL				0
Additional liabilities for other insurance benefits				0
LFPB and other				(187)
MRBs				(6,086)
Total				(6,273)
Accounting Standards Update 2018-12 | Cumulative Effect to Retained Earnings | Accumulated Other Comprehensive Income (Loss)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
DAC, VOBA, DSI and DFEL				2,271
Additional liabilities for other insurance benefits				1,197
LFPB and other				(1,715)
MRBs				2,874
Total				$ 4,627