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	Jan. 01, 2021	Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred acquisition costs, value of business acquired and deferred sales inducements	$ 12,418	$ 12,263			$ 12,162
Reinsurance recoverables	45,110	21,804			20,713
Other assets	10,597	7,677
Future contract benefits	(40,174)	(38,302)			(42,044)
DFEL	5,923	5,115			3,586
Other liabilities	12,438	6,251
Total	10,507	8,604	$ 25,934
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total	(869)	1,414	3,734		4,167
AOCI
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total	$ (1,585)	$ (5,713)	$ 10,250		9,021
Cumulative effect from adoption of new accounting standards
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total					4,822
Cumulative effect from adoption of new accounting standards | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total					(1,820)
Cumulative effect from adoption of new accounting standards | AOCI
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total					4,822
Accounting Standards Update 2018-12 | Cumulative effect from adoption of new accounting standards
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred acquisition costs, value of business acquired and deferred sales inducements					6,079
Reinsurance recoverables					3,163
Other assets					5,795
Future contract benefits					(3,726)
MRBs, net					(4,300)
DFEL					(3,190)
Other liabilities					(819)
Total				$ 3,002	3,002
Accounting Standards Update 2018-12 | Cumulative effect from adoption of new accounting standards | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred acquisition costs, value of business acquired and deferred sales inducements					0
Reinsurance recoverables					607
Other assets					5,795
Future contract benefits					(760)
MRBs, net					(7,956)
DFEL					0
Other liabilities					494
Total				(1,820)	(1,820)
Accounting Standards Update 2018-12 | Cumulative effect from adoption of new accounting standards | AOCI
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred acquisition costs, value of business acquired and deferred sales inducements					6,079
Reinsurance recoverables					2,556
Other assets					0
Future contract benefits					(2,966)
MRBs, net					3,656
DFEL					(3,190)
Other liabilities					(1,313)
Total				$ 4,822	$ 4,822