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Reinsurance - Narrative (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Oct. 01, 2023
agreement
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%      
Number of reinsurance agreements | agreement       2
Investments $ 129,254 $ 124,331    
Reinsurance recoverables, net of allowance for credit losses 28,750 29,843    
Reinsurance recoverable, allowance for credit loss 100 81    
Fortitude Re        
Ceded Credit Risk [Line Items]        
Deposits assets 8,100 7,800    
Investments 9,300 9,900    
Reserves associated with modified coinsurance reinsurance arrangements 9,337 9,871    
Resolution Life        
Ceded Credit Risk [Line Items]        
Reinsurance recoverables, net of allowance for credit losses 4,900 5,000    
Reinsurance recoverable for paid and unpaid claims and claims adjustments 3,800 3,800    
Commonwealth        
Ceded Credit Risk [Line Items]        
Deposits assets 9,500 6,200    
Investments 9,000 5,900    
Protective        
Ceded Credit Risk [Line Items]        
Reinsurance recoverables, net of allowance for credit losses 8,400 9,100    
Reinsurance recoverable for paid and unpaid claims and claims adjustments 9,900 10,500    
Athene Holding Ltd.        
Ceded Credit Risk [Line Items]        
Reinsurance ACL and deposit assets 2,100 2,700    
Reserves associated with modified coinsurance reinsurance arrangements 2,067 2,774    
Letter of credit 63      
Amount of amortization, after-tax, of deferred gain on business sold 26 33 $ 25  
Athene Holding Ltd. | Over-Collateralization        
Ceded Credit Risk [Line Items]        
Reserves associated with modified coinsurance reinsurance arrangements 61      
Swiss Re        
Ceded Credit Risk [Line Items]        
Reinsurance recoverables, net of allowance for credit losses 1,300 1,600    
Trust funded to support reinsurance receivable 617 656    
Fixed Annuities | Fortitude Re        
Ceded Credit Risk [Line Items]        
Reinsurance recoverables 10,600 10,500    
Reinsurance recoverables on unpaid losses 2,600 2,700    
Reinsurance recoverable for unpaid claims and claims adjustments 90 11    
Deposits assets $ 3,000 $ 4,200