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Value of Business Acquired, Deferred Acquisition Costs and Deferred Sales Inducements - Estimated Amortization Expense for VOBA in Future Fiscal Periods (Details) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Mar. 31, 2023
Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]        
2024 $ 111      
2025 138      
2026 126      
2027 115      
2028 105      
Thereafter 812      
Total $ 1,407 $ 1,446 $ 1,572 $ 1,615