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Commitments and Contingencies - Funding Commitments (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Commitments    
Funding commitments $ 2,520 $ 1,908
Commercial mortgage loans    
Commitments    
Funding commitments 58 17
Property funds    
Commitments    
Funding commitments 63 27
Pledged asset lines of credit    
Commitments    
Funding commitments $ 2,399 $ 1,864