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Reinsurance - Recoverables and Claims (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Reinsurance      
Claims recovered through reinsurance $ 404 $ 400 $ 407
Reinsurance recoverables 4,500 3,400  
Liabilities for assumed reinsurance arrangements 413 440  
Long term care insurance      
Reinsurance      
Reinsurance recoverable related to LTC risk ceded to Genworth $ 2,600 $ 2,600