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Reinsurance (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Ceded Credit Risk [Line Items]    
Maximum retention per single insured life on fixed and VUL insurance contracts $ 20  
Percent of mortality risk reinsured on newly issued non-term life insurance contracts 25.00%  
Percent of total individual life in-force amount reinsured 44.00% 35.00%
Reserves associated with modified coinsurance reinsurance arrangements $ 443 $ 541
Reinsurance recoverables 19,826 6,515
Liabilities for funds withheld 4,860 4,348
Swiss Re [Member]    
Ceded Credit Risk [Line Items]    
Reinsurance receivable 1,500 1,900
Trust funded to support reinsurance receivable 2,400  
Liabilities for funds withheld 177  
Liabilities for reinsurance related embedded derivatives 24  
LNBAR [Member]    
Ceded Credit Risk [Line Items]    
Reinsurance receivable 2,500 $ 2,100
Trust funded to support reinsurance receivable 1,900  
Protective [Member]    
Ceded Credit Risk [Line Items]    
Reinsurance recoverables 12,100  
Trust funded to support reinsurance receivable 13,700  
Athene Holding Ltd. [Member]    
Ceded Credit Risk [Line Items]    
Deposit assets 7,500  
Deferred gain on business sold through reinsurance 8  
Athene Holding Ltd. [Member] | AFS Securities [Member]    
Ceded Credit Risk [Line Items]    
Deposit assets 6,500  
Athene Holding Ltd. [Member] | Trading Securities [Member]    
Ceded Credit Risk [Line Items]    
Deposit assets 559  
Athene Holding Ltd. [Member] | Commercial Loan [Member]    
Ceded Credit Risk [Line Items]    
Deposit assets 72  
Athene Holding Ltd. [Member] | Derivative Instruments [Member]    
Ceded Credit Risk [Line Items]    
Deposit assets 60  
Athene Holding Ltd. [Member] | Cash [Member]    
Ceded Credit Risk [Line Items]    
Deposit assets $ 265