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FUTURE POLICY BENEFITS, POLICY AND CONTRACT CLAIMS AND POLICYHOLDERS' ACCOUNT BALANCES - Schedule of Insurance Reserves (Details) - USD ($)
$ in Millions
Jun. 30, 2022
Dec. 31, 2021
Disclosure of reconciliation of changes in insurance contracts by components [line items]    
Gross $ 14,410 $ 8,497
Reinsurance assets (576) (169)
Total insurance reserves    
Disclosure of reconciliation of changes in insurance contracts by components [line items]    
Gross 30,086 8,497
Reinsurance assets (576) (169)
Total insurance reserves $ 29,510 $ 8,328