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INVESTMENTS - Commercial Mortgage Loans by Key Credit Quality Indicator (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Loan-to-Value Ratio:    
Total $ 11,224 $ 12,801
Commercial mortgage loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Weighted average debt-service coverage ratio 2.52  
Loan-to-Value Ratio:    
2024 $ 13  
2023 32  
2022 0  
2021 291  
2020 58  
Prior 1,143  
Total 1,537 $ 1,709
Current-period gross writeoffs:    
2024 0  
2023 0  
2022 0  
2021 0  
2020 0  
Prior 19  
Total $ 19  
Commercial mortgage loans | 2024    
Financing Receivable, Credit Quality Indicator [Line Items]    
Weighted average debt-service coverage ratio 1.21  
Commercial mortgage loans | 2023    
Financing Receivable, Credit Quality Indicator [Line Items]    
Weighted average debt-service coverage ratio 2.62  
Commercial mortgage loans | 2022    
Financing Receivable, Credit Quality Indicator [Line Items]    
Weighted average debt-service coverage ratio 0.00  
Commercial mortgage loans | 2021    
Financing Receivable, Credit Quality Indicator [Line Items]    
Weighted average debt-service coverage ratio 3.16  
Commercial mortgage loans | 2020    
Financing Receivable, Credit Quality Indicator [Line Items]    
Weighted average debt-service coverage ratio 2.52  
Commercial mortgage loans | Prior    
Financing Receivable, Credit Quality Indicator [Line Items]    
Weighted average debt-service coverage ratio 2.37  
Commercial mortgage loans | Loan to Value Ratio, 0% to 59.99%    
Financing Receivable, Credit Quality Indicator [Line Items]    
Weighted average debt-service coverage ratio 2.78  
Loan-to-Value Ratio:    
2024 $ 0  
2023 32  
2022 0  
2021 266  
2020 58  
Prior 920  
Total $ 1,276  
Commercial mortgage loans | Loan to Value Ratio, 60% to 69.99%    
Financing Receivable, Credit Quality Indicator [Line Items]    
Weighted average debt-service coverage ratio 2.11  
Loan-to-Value Ratio:    
2024 $ 0  
2023 0  
2022 0  
2021 25  
2020 0  
Prior 47  
Total $ 72  
Commercial mortgage loans | Loan to Value Ratio, 70% to 79.99%    
Financing Receivable, Credit Quality Indicator [Line Items]    
Weighted average debt-service coverage ratio 1.19  
Loan-to-Value Ratio:    
2024 $ 13  
2023 0  
2022 0  
2021 0  
2020 0  
Prior 87  
Total $ 100  
Commercial mortgage loans | Loan to Value Ratio, 80% or greater    
Financing Receivable, Credit Quality Indicator [Line Items]    
Weighted average debt-service coverage ratio 0.57  
Loan-to-Value Ratio:    
2024 $ 0  
2023 0  
2022 0  
2021 0  
2020 0  
Prior 89  
Total $ 89