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Investments - Schedule of Investments (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]    
AFS securities, at fair value $ 148,347 $ 112,225
Derivative asset, statement of financial position [Extensible Enumeration] Other assets Other assets
Consolidated Entity, Excluding VIE    
Schedule of Equity Method Investments [Line Items]    
Total Investments, including related parties – Retirement Services $ 244,443 $ 202,030
Asset Management | Consolidated Entity, Excluding VIE    
Schedule of Equity Method Investments [Line Items]    
Investments, at fair value 1,489 1,320
Equity method investments 1,072 979
Performance allocations 2,941 2,574
U.S. Treasury securities, at fair value 0 709
Total Investments – Asset Management 5,502 5,582
Retirement Services | Consolidated Entity, Excluding VIE    
Schedule of Equity Method Investments [Line Items]    
AFS securities, at fair value 148,347 112,225
Trading securities, at fair value 2,544 2,473
Equity securities 1,611 1,766
Mortgage loans, at fair value 45,396 28,756
Investment funds 1,741 1,648
Policy loans 334 347
Funds withheld at interest 30,833 42,688
Derivative assets 5,298 3,309
Short-term investments 1,288 2,160
Other investments 1,549 1,076
Total Investments, including related parties – Retirement Services $ 238,941 $ 196,448