Adoption of ASU 2018-12 - Effect of Accounting Adoption to Consolidated Balance Sheets (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]
DAC, VOBA and DSI	$ 12,397	$ 12,235		$ 12,104
Reinsurance recoverables	29,843	19,953		19,388
Other assets	9,311	6,778
Future contract benefits	(39,864)	(38,826)		(42,828)
DFEL	5,901	5,091		3,591
Other liabilities	7,350	6,356
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
Cumulative Effect to Retained Earnings | Accounting Standards Update 2018-12
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
DAC, VOBA and DSI				6,079
Reinsurance recoverables				3,038
Other assets				242
Future contract benefits				(3,932)
MRBs, net				(4,300)
DFEL				(3,190)
Other liabilities				417
Total				(1,646)
Cumulative Effect to Retained Earnings | Accounting Standards Update 2018-12 | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
DAC, VOBA and DSI				0
Reinsurance recoverables				607
Other assets				242
Future contract benefits				(844)
MRBs, net				(7,956)
DFEL				0
Other liabilities				1,678
Total				(6,273)
Cumulative Effect to Retained Earnings | Accounting Standards Update 2018-12 | Accumulated Other Comprehensive Income (Loss)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
DAC, VOBA and DSI				6,079
Reinsurance recoverables				2,431
Other assets				0
Future contract benefits				(3,088)
MRBs, net				3,656
DFEL				(3,190)
Other liabilities				(1,261)
Total				$ 4,627