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Reinsurance (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Ceded Credit Risk [Line Items]      
Reinsurance ACL and deposit assets $ 314.0 $ 188.0  
Maximum retention per single insured life on fixed and VUL insurance contracts $ 20.0    
Percent of mortality risk reinsured on newly issued non-term life insurance contracts 21.00%    
Swiss Re [Member]      
Ceded Credit Risk [Line Items]      
Reinsurance receivable $ 1,100.0    
Trust funded to support reinsurance receivable 710,000.0 1,000.0  
LNBAR [Member]      
Ceded Credit Risk [Line Items]      
Reinsurance Recoverables, Gross 23,900.0 22,800.0  
Reinsurance receivable 4,400.0 2,900.0  
Trust funded to support reinsurance receivable 2,200.0 3,000.0  
Protective [Member]      
Ceded Credit Risk [Line Items]      
Reinsurance Recoverables, Gross 10,100.0 10,700.0  
Protective [Member] | Ceded Credit Risk, Secured [Member]      
Ceded Credit Risk [Line Items]      
Reinsurance Recoverables, Gross 11,500.0 14,000.0  
Athene Holding Ltd. [Member]      
Ceded Credit Risk [Line Items]      
Deposit assets 3,800.0 5,000.0  
Amount of amortization, after-tax, of deferred gain on business sold 25.0 26.0 $ 29.0
Reserves associated with modified coinsurance reinsurance arrangements 3,809.0 5,404.0  
Letter of credit 117.0    
Athene Holding Ltd. [Member] | Ceded Credit Risk, Secured [Member]      
Ceded Credit Risk [Line Items]      
Reserves associated with modified coinsurance reinsurance arrangements 105.0    
Resolution Life [Member]      
Ceded Credit Risk [Line Items]      
Reinsurance receivable 4,700.0    
Deferred gain on business sold through reinsurance 40.0 $ 10.0  
Resolution Life [Member] | Ceded Credit Risk, Secured [Member]      
Ceded Credit Risk [Line Items]      
Reinsurance Recoverables, Gross $ 4,100.0