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Deferred Policy Acquisition Costs, Value of Business Acquired, Unearned Revenue and Other Intangibles (Estimated Future Amortization) (Details)
$ in Millions
Dec. 31, 2024
USD ($)
Estimated future amortization expense allocated to other expenses for VOBA [Abstract]  
VOBA 2025 $ 116
VOBA 2026 109
VOBA 2027 101
VOBA 2028 93
VOBA 2029 87
Value of Distribution Agreements and Customer Relationships Acquired [Abstract]  
VODA and VOCRA 2025 81
VODA and VOCRA 2026 80
VODA and VOCRA 2027 78
VODA and VOCRA 2028 75
VODA and VOCRA 2029 73
Negative Value of Business Acquired [Abstract]  
Negative VOBA 2025 (24)
Negative VOBA 2026 (23)
Negative VOBA 2027 (21)
Negative VOBA 2028 (20)
Negative VOBA 2029 $ (19)