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Investments - Available-for-sale Impairment Losses Recognized in Earnings (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Fixed maturity securities available-for-sale:        
Impairment losses recognized in earnings $ 12 $ 12 $ 32 $ 37
Mortgage Receivable        
Fixed maturity securities available-for-sale:        
Gain (loss) on mortgage loans due to changes in expected credit losses 0 5 0 11
Corporate and other bonds        
Fixed maturity securities available-for-sale:        
Impairment losses recognized in earnings 8 8 23 25
Asset-backed        
Fixed maturity securities available-for-sale:        
Impairment losses recognized in earnings $ 4 $ 4 $ 9 $ 12