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Investments - Schedule of Commercial Mortgage Loans Amortized Cost by Debt Service Coverage Ratio Distribution and Year of Origination (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost, net $ 784 $ 822
Mortgage loans on real estate    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 735 833
Allowance (12) (11)
Amortized cost, net 723 822
Mortgage loans on real estate | 2019 and prior    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 250  
Mortgage loans on real estate | 2020    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 52  
Mortgage loans on real estate | 2021    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 165  
Mortgage loans on real estate | 2022    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 90  
Mortgage loans on real estate | 2023    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 129  
Mortgage loans on real estate | 2024    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 49  
Below 1.0 | Mortgage loans on real estate    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 0 13
Below 1.0 | Mortgage loans on real estate | 2019 and prior    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 0  
Below 1.0 | Mortgage loans on real estate | 2020    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 0  
Below 1.0 | Mortgage loans on real estate | 2021    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 0  
Below 1.0 | Mortgage loans on real estate | 2022    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 0  
Below 1.0 | Mortgage loans on real estate | 2023    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 0  
Below 1.0 | Mortgage loans on real estate | 2024    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 0  
1.0 - 1.25 | Mortgage loans on real estate    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 137 41
1.0 - 1.25 | Mortgage loans on real estate | 2019 and prior    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 59  
1.0 - 1.25 | Mortgage loans on real estate | 2020    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 0  
1.0 - 1.25 | Mortgage loans on real estate | 2021    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 0  
1.0 - 1.25 | Mortgage loans on real estate | 2022    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 18  
1.0 - 1.25 | Mortgage loans on real estate | 2023    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 25  
1.0 - 1.25 | Mortgage loans on real estate | 2024    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 35  
1.26 - 1.50 | Mortgage loans on real estate    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 105 133
1.26 - 1.50 | Mortgage loans on real estate | 2019 and prior    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 47  
1.26 - 1.50 | Mortgage loans on real estate | 2020    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 10  
1.26 - 1.50 | Mortgage loans on real estate | 2021    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 0  
1.26 - 1.50 | Mortgage loans on real estate | 2022    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 30  
1.26 - 1.50 | Mortgage loans on real estate | 2023    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 18  
1.26 - 1.50 | Mortgage loans on real estate | 2024    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 0  
Above 1.50 | Mortgage loans on real estate    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 493 $ 646
Above 1.50 | Mortgage loans on real estate | 2019 and prior    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 144  
Above 1.50 | Mortgage loans on real estate | 2020    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 42  
Above 1.50 | Mortgage loans on real estate | 2021    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 165  
Above 1.50 | Mortgage loans on real estate | 2022    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 42  
Above 1.50 | Mortgage loans on real estate | 2023    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance 86  
Above 1.50 | Mortgage loans on real estate | 2024    
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost before allowance $ 14